Academic literature on the topic 'SU8 Sensor Chip'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'SU8 Sensor Chip.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "SU8 Sensor Chip"
1
Qiao, Dan Yang, Feng Qiang Gao, Xin Ming Lin, Zeng Zheng Wang, and Zi Jian Lin. "A Study on HT32F1765 MCU-Based in Smart Home Gas Monitoring." Applied Mechanics and Materials 644-650 (September 2014): 1298–302. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.1298.
Full textAbstract:
With the rapid development of today's society, air pollution is becoming one of the hottest topics of humans’ concern. Looking at the daily life, some peoples’ awareness in the dangers of indoor air pollution and household gas safety is not enough, so it may lead to a number of respiratory diseases, or "sub-health" conditions. (Such as influenza, pharyngitis and other diseases) On the other hand, some families, because of a gas leak, has not been timely warning of fires and caused the tragedy. To solve these problems, this work is designed based on low-power microcontroller as the master chip HT32F1765 100LQFP between the various smart sensors and did data exchange with the home environment monitoring system. The HT chip use as the master chip and combined with using Sharp PM2.5 gas sensors, temperature and humidity sensors, gas concentration sensor as gas sensing devices. We use all these sensors as information collection module, to collect the data information of air quality, temperature, humidity and combustible gas concentration in different rooms and different locations. The real-time data acquisition and sensor would be displayed on the touch screen. In addition, the creation of data monitoring hardware devices, as well as match the mobile phone in APP. Our users can log on the APP remotely to view home monitoring information, or to receive alarm information.. Thus, adults can safely work outside, avoiding unnecessary worry.
2
Hu, Zhixiang, Licheng Zhou, Long Li, Binzhou Ying, Yunong Zhao, Peng Wang, Huayao Li, Yang Zhang, and Huan Liu. "Quantum Dots-Sensitized High Electron Mobility Transistor (HEMT) for Sensitive NO2 Detection." Chemosensors 11, no. 4 (April 18, 2023): 252. http://dx.doi.org/10.3390/chemosensors11040252.
Full textAbstract:
Colloidal quantum dots (CQDs) are gaining increasing attention for gas sensing applications due to their large surface area and abundant active sites. However, traditional resistor-type gas sensors using CQDs to realize molecule recognition and signal transduction at the same time are associated with the trade-off between sensitivity and conductivity. This limitation has restricted their range of practical applications. In this study, we propose and demonstrate a monolithically integrated field-effect transistor (FET) gas sensor. This novel FET-type gas sensor utilizes the capacitance coupling effect of the CQD sensing film based on a floating gate, and the quantum capacitance plays a role in the capacitance response of the CQD sensing film. By effectively separating the gate sensing film from the two-dimensional electron gas (2DEG) conduction channel, the lead sulfide (PbS) CQD gate-sensitized FET gas sensor offers high sensitivity, a high signal-to-noise ratio, and a wide range, with a real-time response of sub-ppb NO2. This work highlights the potential of quantum dot-sensitized FET gas sensors as a practical solution for integrated gas sensor chip applications using CQDs.
3
Gaudestad, Jan, and Antonio Orozco. "Magnetic Current Imaging of a TSV short in a 3D IC." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2015, DPC (January 1, 2015): 001408–28. http://dx.doi.org/10.4071/2015dpc-wp14.
Full textAbstract:
In this paper we show Magnetic Field Imaging (MFI) is the best method for Electric Fault Isolation (EFI) of short failures in 2.5/3D Through Silicon Via (TSV) devices in a true non-destructive way by imaging the current path. To confirm the failing locations and to do Physical Failure Analysis (PFA), a Dual Beam-Plasma FIB (DB-PFIB) system was used for cross sectioning and volume analysis of the TSV structures and high resolution imaging of the identified defects. Magnetic Current Imaging (MCI) is a sub technique of MFI which has been used by the semiconductor industry for more than a decade to find electrical shorts and leakage paths and which has the capability to “look through” all materials typically used in the semiconductor industry, allowing global imaging without the need for physical de-processing [1, 2, 3]. MCI utilizes two types of sensors: a Superconducting Quantum Interference Device (SQUID) sensor for low current and large working distances and a Giant Magneto Resistance (GMR) sensor for sub micron resolution current imaging at wafer/die level [3]. The sample investigated in this work is a triple-layer stack, in which 2 layers of 50 μm thick test chip (Chip 1 and Chip 2 in Figure 1) were assembled on a 200 μm thick bottom chip (Chip 0 in Figure 1). The test chips were manufactured by imec's standard 65 nm CMOS Back End of Line (BEOL) process, 5×50 μm via-middle TSV technology [4], and fine pitch micro bumping process [6]. Further details of the test vehicle and assembly process can be found elsewhere [5]. The sample had a short between daisy chain a1 and a2, which were supposed to be electrically separated. The probe tests that was used for this experiment is shown in Table 1. The signal was injected into the respective daisy chains by probing V+ to V− on the bottom chip. To send a signal between daisy chain a1 and a2 one could probe V− to V− and V+ to V+. The MCI scans were done using the GMR sensor only. The sample was attached to a vacuum chuck and raster scanned. From Fig. 2 one can see that the current enters the top layer (Chip 2) at TSV 18 and goes back down again to Chip 1 at TSV 28. Since the sample clearly has multiple shorts, the short located at TSV pair 23 was chosen for PFA using the PFIB. A short is found between the 2 BEOL layers of Chip 1, causing the current to leak into Chip 2 (Fig. 3).
4
Comes, Maria Colomba, Arianna Mencattini, Davide Di Giuseppe, Joanna Filippi, Michele D’Orazio, Paola Casti, Francesca Corsi, Lina Ghibelli, Corrado Di Natale, and Eugenio Martinelli. "A Camera Sensors-Based System to Study Drug Effects on In Vitro Motility: The Case of PC-3 Prostate Cancer Cells." Sensors 20, no. 5 (March 10, 2020): 1531. http://dx.doi.org/10.3390/s20051531.
Full textAbstract:
Cell motility is the brilliant result of cell status and its interaction with close environments. Its detection is now possible, thanks to the synergy of high-resolution camera sensors, time-lapse microscopy devices, and dedicated software tools for video and data analysis. In this scenario, we formulated a novel paradigm in which we considered the individual cells as a sort of sensitive element of a sensor, which exploits the camera as a transducer returning the movement of the cell as an output signal. In this way, cell movement allows us to retrieve information about the chemical composition of the close environment. To optimally exploit this information, in this work, we introduce a new setting, in which a cell trajectory is divided into sub-tracks, each one characterized by a specific motion kind. Hence, we considered all the sub-tracks of the single-cell trajectory as the signals of a virtual array of cell motility-based sensors. The kinematics of each sub-track is quantified and used for a classification task. To investigate the potential of the proposed approach, we have compared the achieved performances with those obtained by using a single-trajectory paradigm with the scope to evaluate the chemotherapy treatment effects on prostate cancer cells. Novel pattern recognition algorithms have been applied to the descriptors extracted at a sub-track level by implementing features, as well as samples selection (a good teacher learning approach) for model construction. The experimental results have put in evidence that the performances are higher when a further cluster majority role has been considered, by emulating a sort of sensor fusion procedure. All of these results highlighted the high strength of the proposed approach, and straightforwardly prefigure its use in lab-on-chip or organ-on-chip applications, where the cell motility analysis can be massively applied using time-lapse microscopy images.
5
Küng, Alain, Benjamin A. Bircher, and Felix Meli. "Low-Cost 2D Index and Straightness Measurement System Based on a CMOS Image Sensor." Sensors 19, no. 24 (December 11, 2019): 5461. http://dx.doi.org/10.3390/s19245461.
Full textAbstract:
Accurate traceable measurement systems often use laser interferometers for position measurements in one or more dimensions. Since interferometers provide only incremental information, they are often combined with index sensors to provide a stable reference starting point. Straightness measurements are important for machine axis correction and for systems having several degrees of freedom. In this paper, we investigate the accuracy of an optical two-dimensional (2D) index sensor, which can also be used in a straightness measurement system, based on a fiber-coupled, collimated laser beam pointing onto an image sensor. Additionally, the sensor can directly determine a 2D position over a range of a few millimeters. The device is based on a simple and low-cost complementary metal–oxide–semiconductor (CMOS) image sensor chip and provides sub-micrometer accuracy. The system is an interesting alternative to standard techniques and can even be implemented on machines for real-time corrections. This paper presents the developed sensor properties for various applications and introduces a novel error separation method for straightness measurements.
6
Sun, Mojie, Guoqing Song, Jingjing Liu, Hongmei Chen, and Fuqiang Nie. "In situ controllable synthesis of cotton-like polyaniline nanostructures for a H2O2 sensor using an embedded three-electrode microfluidic chip." RSC Advances 7, no. 22 (2017): 13637–42. http://dx.doi.org/10.1039/c6ra27165k.
Full text
7
Li, Zhanming, Zunzhong Ye, Yingchun Fu, Yonghua Xiong, and Yanbin Li. "A portable electrochemical immunosensor for rapid detection of trace aflatoxin B1 in rice." Analytical Methods 8, no. 3 (2016): 548–53. http://dx.doi.org/10.1039/c5ay02643a.
Full textAbstract:
To explore the possibility of achieving rapid and in situ detection of aflatoxin B1 (AFB1), a portable biosensing instrument consisting of an impedance detector and a 3D-printed USB-compatible sensor chip was developed.
8
Y. Elsayed, Mohamed, Sherif M. Sherif, Amina S. Aljaber, and Mohamed A. Swillam. "Integrated Lab-on-a-Chip Optical Biosensor Using Ultrathin Silicon Waveguide SOI MMI Device." Sensors 20, no. 17 (September 1, 2020): 4955. http://dx.doi.org/10.3390/s20174955.
Full textAbstract:
Waveguides with sub-100 nm thickness offer a promising platform for sensors. We designed and analyzed multimode interference (MMI) devices using these ultrathin platforms for use as biosensors. To verify our design methodology, we compared the measured and simulated spectra of fabricated 220-nm-thick MMI devices. Designs of the MMI biosensors based on the sub-100 nm platforms have been optimized using finite difference time domain simulations. At a length of 4 mm, the 50-nm-thick MMI sensor provides a sensitivity of roughly 420 nm/RIU and with a figure of merit (FOM) definition of sensitivity/full-width-at-half-maximum, the FOM is 133. On the other hand, using a thickness of 70 nm results in a more compact design—only 2.4 mm length was required to achieve a similar FOM, 134, with a sensitivity of 330 nm/RIU. The limits of detection (LOD) were calculated to be 7.1 × 10−6 RIU and 8.6 × 10−6 RIU for the 50 nm and the 70-nm-thick sensor, respectively. The LOD for glucose sensing was calculated to be less than 10 mg dL−1 making it useful for detecting glucose in the diabetic range. The biosensor is also predicted to be able to detect layers of protein, such as biotin-streptavidin as thin as 1 nm. The ultrathin SOI waveguide platform is promising in biosensing applications using this simple MMI structure.
9
Zhao, Dong, Bingyuan Zhao, Dmitri Koltsov, Shutang Chen, and Gugang Chen. "Detection of VOCs and Nitrogen Containing Gaseous Molecules By Utilizing Carbon Nanotubes (CNTs) As Sensing Materials." ECS Meeting Abstracts MA2022-02, no. 63 (October 9, 2022): 2629. http://dx.doi.org/10.1149/ma2022-02632629mtgabs.
Full textAbstract:
Carbon nanomaterials are increasingly attractive as potential candidates to make new generation of sensors due to their unique nanostructures that grant their promising electrical, chemical, and physical properties. Among the group of carbon materials, carbon nanotube (CNT) is one of the most encouraging materials because of its features of high surface-to-volume ratio and unique electronic structure. These features enable CNTs the potential to become a highly sensitive sensing material. Since our project aims on detecting bio-marks from human breath, of which the concentrations are extremely low, the nature of our sensor R&D becomes extremely challenging. Consequently, using CNTs as the sensing materials ought to be our obvious choice at this stage. This choice of carbonous materials as sensing media is also on the hope to simplify the sensor’s instability problems in our R&D effort because carbon itself is very chemically inert toward many chemicals. This presentation will serve as a report of the preliminary results from a lab experiment setting to detect several human breath related bio-marks. Sensors were chemiresistive typed and constructed through drop casting on interdigitated sensor circuit. Each sensor chip contains 8 sensor pixels, and the test bed can host maximum of 16 sensor chips simultaneously. In other words, our sensor testing chamber can embed up to 128 sensors at the same time. We then performed the sensor testing against several gases. As expected, the application of nanotechnology in using CNTs enabled us to approach high sensitivity towards to several gaseous analytes, ranging from sub-ppb to sub-ppm. Noticed that, the previous study from our lab revealed that the sensitivity of sensors could be promoted by illuminations of UV light.1 It was approved that the detection limit of nitric oxides is about 27 ppm, providing reliable and stable sensitivity. To simplify the sensor fabrication and miniaturization as well as to reduce power consumption of final sensor units, in this work, we employed an external thermal power to improve the reversibility of the sensors. Two external 375W IR bulbs were used as the heating source in this setting. A dimmer and temperature control circuitry were integrated to maintain the intended operating temperatures. Moreover, we employed our test protocols and methods by functionalizing the CNTs with carboxylic group, besides utilizing the pristine CNTs. It was resulted that this sensor array was able to detect various gaseous species, including NH3, Isoprene, acetone, etc., with relatively high sensitivity. The existence of surfactants in the CNT sensing layer lowered the conductivity of sensor pixels by a great magnitude and resulted in much reduced sensors’ sensitivities. Therefore, removing surfactants in the CNT solution was made, which dramatically improved the sensors’ electric conductivities and boosted sensors’ sensitivities. However, CNT solutions with diluted surfactants destabilize the CNTs’ aqueous suspension, and lead to the non-uniform CNTs layers. The sensor pixels fabricated by using this surfactant deficient CNTs resulted in the formation of CNT bundles or clusters. The gathering of CNTs in a non-uniform fashion could dramatically reduce the sensor’s sensitivity because the bundles would short the interdigitated circuit and disable the CNTs’ sensing capability in most other area of the sensor film. We, therefore, increased the amount of surfactant in the CNT solutions. The sensors fabricated with excess amount of surfactant exhibited highly electric resistance or even non-conductance with very low or no sensitivity. A simple washing process was then developed to wash out the surfactant, which partially resolved the non-uniformity problem. The method to completely prevent the CNT bundles from formation in sensor film is in progress. In conclusion, we developed a gas sensor array that can detect various VOCs and certain nitrogen containing gas molecules with an extremely high or reasonably high sensitivities. Through applying pristine, modified CNTs or mixtures of both into sensor fabrication, the sensing properties were enhanced under an external heating source in comparison with illumination of UV light. The best sensitivity of the sensors is achieved by removing the surfactants in the sensing films. The application of external thermal energy to help on sensors’ performance gets approved. The benefit of using thermal energy vs. UV light is also discussed. G. Chen, T. M. Paronyan, E. M. Pigos, and A. R. Harutyunyan, Scientific Reports 2, 343 (2012).
10
Castro-Hurtado, I., J. Gonzalez-Chávarri, S. Morandi, J. Samà, A. Romano-Rodríguez, E. Castaño, and G. G. Mandayo. "Formaldehyde sensing mechanism of SnO2 nanowires grown on-chip by sputtering techniques." RSC Advances 6, no. 22 (2016): 18558–66. http://dx.doi.org/10.1039/c5ra26105h.
Full textDissertations / Theses on the topic "SU8 Sensor Chip"
1
Attia, Rafaële. "Modifications de surfaces et intégration de MEMS pour les laboratoires sur puce." Paris 6, 2008. https://tel.archives-ouvertes.fr/tel-00516528.
Full textAbstract:
Cette thèse présente diverses applications de la photopolymérisation radicalaire dans les puces microfluidiques. Dans un premier temps, nous décrirons l’importance des modifications de surfaces des puces microfluidiques afin de conférer à la surface un caractère hydrophile et neutre. Nous présenterons une modification de surface par photopolymérisation radicalaire in-situ de polyacrylamide pour des puces d’une part en PDMS, sur lequel la longévité des modifications de surface est difficile à obtenir, et d’autre part sur le COC qui étant inerte chimiquement, est difficilement modifiable. Dans une autre application la photopolymérisation sera effectuée en volume et nous permettra d’intégrer très simplement des MEMS, in-situ dans le microcanal. L’intégration de réseaux de colonnes fonctionnalisées avec des protéines sera présentée, ainsi que l’implémentation de deux capteurs de flux. Un capteur de flux basé sur l’élongation d’une structure déformable s’est montré très performant en terme de large gamme de mesures, de sensibilité et de reproductibilité. Le deuxième capteur de flux est basé sur la rotation d’un objet autour d’un axe. Sa mesure est indépendante de la viscosité du fluide malgré ses moindres performances
2
Battistini, Gionata <1977>. "Sensori chimici basati su molecole e nanoparticelle." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/1037/1/Tesi_Battistini_Gionata.pdf.
Full textAbstract:
Con questo lavoro di tesi si è cercato da un lato di dare un contributo al settore dei
sensori chimici, caratterizzando e sviluppando diversi sistemi che presentano
promettenti proprietà per l’utilizzo nella realizzazione di sensori luminescenti, e
dall’altro di studiare sistemi di nanoparticelle di oro per identificarne e
caratterizzarne i processi che portano all’interazione con un’unità fluorescente di
riferimento, il pirene.
Quest’ultima parte della tesi, sviluppata nel capitolo 4, sebbene possa apparire
“slegata” dall’ambito della sensoristica, in realtà non lo è in quanto il lavoro di
ricerca svolto rappresenta una buona base di partenza per lo sviluppo di sistemi di
nanoparticelle metalliche con un possibile impiego in campo biomedico e
diagnostico.
Tutte le specie studiate, seppur molto diverse tra loro, posseggono quindi buone
caratteristiche di luminescenza ed interessanti capacità di riconoscimento, più o
meno selettivo, di specie in soluzione o allo stato gassoso.
L’approccio generale che è stato adottato comporta una iniziale caratterizzazione
in soluzione ed una susseguente ottimizzazione del sistema mirata a passare al
fissaggio su supporti solidi in vista di possibili applicazioni pratiche.
A tal proposito, nel capitolo 3 è stato possibile ottenere un monostrato organico
costituito da un recettore (un cavitando), dotato di una parte fluorescente le cui
proprietà di luminescenza sono sensibili alla presenza di una funzione chimica che
caratterizza una classe di analiti, gli alcoli. E’ interessante sottolineare come lo
stesso sistema in soluzione si comporti in maniera sostanzialmente differente,
mostrando una capacità di segnalare l’analita molto meno efficiente, anche in
funzione di una diversa orientazione della parte fluorescente. All’interfaccia
solido-gas invece, l’orientamento del fluoroforo gioca un ruolo chiave nel processo
di riconoscimento, e ottimizzando ulteriormente il setup sperimentale e la
composizione dello strato, sarà possibile arrivare a segnalare quantità di analita
sempre più basse.
Nel capitolo 5 invece, è stato preso in esame un sistema le cui potenzialità, per un
utilizzo come sonda fluorescente nel campo delle superfici di silicio, sembra
promettere molto bene. A tal proposito sono stati discussi anche i risultati del
lavoro che ha fornito l’idea per la concezione di questo sistema che, a breve, verrà
implementato a sua volta su superficie solida.
In conclusione, le ricerche descritte in questa tesi hanno quindi contribuito allo
sviluppo di nuovi chemosensori, cercando di migliorare sia le proprietà fotofisiche
dell’unità attiva, sia quelle dell’unità recettrice, sia, infine, l’efficienza del
processo di traduzione del segnale. I risultati ottenuti hanno inoltre permesso di
realizzare alcuni prototipi di dispositivi sensoriali aventi caratteristiche molto
promettenti e di ottenere informazioni utili per la progettazione di nuovi dispositivi
(ora in fase di sviluppo nei laboratori di ricerca) sempre più efficienti, rispondendo
in tal modo alle aspettative con cui questo lavoro di dottorato era stato intrapreso.
3
Battistini, Gionata <1977>. "Sensori chimici basati su molecole e nanoparticelle." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/1037/.
Full textAbstract:
Con questo lavoro di tesi si è cercato da un lato di dare un contributo al settore dei
sensori chimici, caratterizzando e sviluppando diversi sistemi che presentano
promettenti proprietà per l’utilizzo nella realizzazione di sensori luminescenti, e
dall’altro di studiare sistemi di nanoparticelle di oro per identificarne e
caratterizzarne i processi che portano all’interazione con un’unità fluorescente di
riferimento, il pirene.
Quest’ultima parte della tesi, sviluppata nel capitolo 4, sebbene possa apparire
“slegata” dall’ambito della sensoristica, in realtà non lo è in quanto il lavoro di
ricerca svolto rappresenta una buona base di partenza per lo sviluppo di sistemi di
nanoparticelle metalliche con un possibile impiego in campo biomedico e
diagnostico.
Tutte le specie studiate, seppur molto diverse tra loro, posseggono quindi buone
caratteristiche di luminescenza ed interessanti capacità di riconoscimento, più o
meno selettivo, di specie in soluzione o allo stato gassoso.
L’approccio generale che è stato adottato comporta una iniziale caratterizzazione
in soluzione ed una susseguente ottimizzazione del sistema mirata a passare al
fissaggio su supporti solidi in vista di possibili applicazioni pratiche.
A tal proposito, nel capitolo 3 è stato possibile ottenere un monostrato organico
costituito da un recettore (un cavitando), dotato di una parte fluorescente le cui
proprietà di luminescenza sono sensibili alla presenza di una funzione chimica che
caratterizza una classe di analiti, gli alcoli. E’ interessante sottolineare come lo
stesso sistema in soluzione si comporti in maniera sostanzialmente differente,
mostrando una capacità di segnalare l’analita molto meno efficiente, anche in
funzione di una diversa orientazione della parte fluorescente. All’interfaccia
solido-gas invece, l’orientamento del fluoroforo gioca un ruolo chiave nel processo
di riconoscimento, e ottimizzando ulteriormente il setup sperimentale e la
composizione dello strato, sarà possibile arrivare a segnalare quantità di analita
sempre più basse.
Nel capitolo 5 invece, è stato preso in esame un sistema le cui potenzialità, per un
utilizzo come sonda fluorescente nel campo delle superfici di silicio, sembra
promettere molto bene. A tal proposito sono stati discussi anche i risultati del
lavoro che ha fornito l’idea per la concezione di questo sistema che, a breve, verrà
implementato a sua volta su superficie solida.
In conclusione, le ricerche descritte in questa tesi hanno quindi contribuito allo
sviluppo di nuovi chemosensori, cercando di migliorare sia le proprietà fotofisiche
dell’unità attiva, sia quelle dell’unità recettrice, sia, infine, l’efficienza del
processo di traduzione del segnale. I risultati ottenuti hanno inoltre permesso di
realizzare alcuni prototipi di dispositivi sensoriali aventi caratteristiche molto
promettenti e di ottenere informazioni utili per la progettazione di nuovi dispositivi
(ora in fase di sviluppo nei laboratori di ricerca) sempre più efficienti, rispondendo
in tal modo alle aspettative con cui questo lavoro di dottorato era stato intrapreso.
4
Perget, Florian. "Développement de réseaux de capteurs de nouvelle génération pour la surveillance de structures aéronautiques." Thesis, Toulouse, INSA, 2014. http://www.theses.fr/2014ISAT0035/document.
Full textAbstract:
Les réseaux de capteurs sans-fil sont une nouvelle technologie qui permet de déployer des capteurs hétérogènes et de les faire communiquer sans fil et de façon autonome. Cette capacité nouvelle à surveiller ou instrumenter le monde qui nous entoure ouvre la voie à de nouvelles applications innovantes ou à une évolution majeure d’applications déjà existantes.D’une dizaine de nœuds à plusieurs milliers, les réseaux de capteurs sans fil commencent à conquérir le monde industriel et notre vie quotidienne. Leurs besoins en communications, gestion, génération et stockage de l’énergie, miniaturisation et réduction des coûts ne nécessitent pas seulement de perfectionner les technologies actuelles mais bien d’en inventer de nouvelles. Parmi toutes les applications révolutionnaires des réseaux de capteurs sans fil comme dans la santé, l’environnement, l’industrie et le militaire, l’une des applications les plus transformatrices est la surveillance de structure. La surveillance de structure est l’art de surveiller tout ce qui peut s’abimer, s’user ou tomber en panne. Elle est particulièrement importante dans les domaines des transports et du bâtiment, étant donné que la sécurité des personnes est en jeu. En plaçant aux endroits stratégiques des capteurs sans-fil, il sera possible de prévoir et de prévenir la défaillance d’un pont, l’usure d’un avion ou d’un train ou la déformation d’un bâtiment. La surveillance de structure permet de prévenir les pannes et les défaillances, de réduire les coûts de maintenance et d’améliorer les performances. C’est un processus complexe qui implique plusieurs technologies : des capteurs, la transmission de l’information et l’analyse des données. La nature (accéléromètre, gyroscope, jauge de contrainte, température, pression, fuite, givre, etc. . .), la position ainsi que le nombre de capteurs sont dictés et dépendants des besoins de l’analyse de la structure qui doit être effectuée. De ce fait, les contraintes imposées au système de transmission de données sans fil, afin d’offrir une couverture suffisante de la structure de l’appareil avec plusieurs centaines voire plusieurs milliers de capteurs que leur localisation rendra difficile d’accès, nécessitent des nouvelles innovations en matière d’efficacité énergétique et de performance de communication. Ce travail s’intéresse à la conception et l’implémentation d’un système de transmission de données dans un réseau de capteurs sans-fil. Après une présentation des exigences du système de surveillance de structure aéronautique, l’architecture générale du système de surveillance est décrite. Une couche physique spécifique à haute efficacité énergétique basée sur l’Impulse-Radio UltraWide Band a été conçue. Les designs complets de l’émetteur et du récepteur IR-UWB sont présentés ainsi que l'optimisation du codage canal par rapport à la consommation énergétique. Une couche MAC spécifique permettant un nombre important de nœuds et une efficacité énergétique élevée basée sur du TDMA reconfigurable a été conçue. Plusieurs prototypes ont été implémentés pour valider la conception et démontrer les performances. Ces implémentation utilise des techniques avancées d’optimisation de la consommation énergétique et de reconfigurabilité afin de répondre aux exigences des réseaux de capteurs sans-fil. Des simulations ASIC permettent également de prévoir que ce système permettra de supporter des débits applicatifs de plusieurs centaines de mégabits par seconde, tout en permettant à plusieurs dizaines de nœuds de communiquer. Les performances énergétiques de ce système de communication sont aujourd’hui à l’état de l’art. Enfin, cette technologie de communication sans-fil a été intégrée dans un système complet de deux nœuds capteurs et d’un routeur dans un démonstrateur FPGAWireless Sensor Networks (WSN) is an emerging technology which allows deploying wireless communicating autonomous heterogenous sensors. This monitoring capability paves the way for new innovative applications or breakthrough evolution of existing ones. WSN have started to change the industry and our daily lives. Their communication, energy, miniaturization and cost requirements cannot be met by evolutions of current technologies but will require new innovations.Among health, environment, industrial and military applications for WSN, one of the most revolutionary is Structural Health Monitoring (SHM). SHM is the art of monitoring anything which can wear, break down or be damaged. It is of utmost importance in safety sensitive domains such as the transport and construction industries.By placing sensors in carefully chosen locations, SHM will allow failure prediction, cost reduction and improved performance of bridges, planes, building or engines.The tens to thousands of sensors and the huge amount of data generated places a strong burden on the wireless communication of the nodes, which cannot be satisfied with today’s technology. This work presents the design and implementation works such a wireless communication system.Following a presentation of the context and requirement of this work, a general description of the SHM system is given. A specific highly energy efficient physical layer based on Impulse-Radio UltraWide Band (IR-UWB) has been designed.The complete IR-UWB transmitter and receiver are detailed, including the energy efficiency optimized channel coding. A specific Medium Access Control (MAC) layer allowing a large number of communicating nodes based on reconfigurableTime Division Multiple Access (TDMA) was designed. Several prototypes of this system have been implemented to prove feasibility and performance. These implementations employ advanced energy consumption reduction and reconfigurability techniques to answer WSN communication challenges. An ASIC implementation simulation has demonstrated hundreds of megabits per second data rate at state of the art energy efficiency
5
Ngan, Nicolas. "Etude et conception d'un réseau sur puce dynamiquement adaptable pour la vision embarquée." Thesis, Paris Est, 2011. http://www.theses.fr/2011PEST1040/document.
Full textAbstract:
Un équipement portable moderne intègre plusieurs capteurs d'image qui peuvent être de différents types. On peut citer en guise d'exemple un capteur couleur, un capteur infrarouge ou un capteur basse lumière. Cet équipement doit alors supporter différentes sources qui peuvent être hétérogènes en terme de résolution, de granularité de pixels et de fréquence d'émission des images. Cette tendance à multiplier les capteurs, est motivée par des besoins applicatifs dans un but de complémentarité en sensibilité (fusion des images), en position (panoramique) ou en champ de vision. Le système doit par conséquent être capable de supporter des applications de plus en plus complexes et variées, nécessitant d'utiliser une seule ou plusieurs sources d'image. Du fait de cette variété de fonctionnalités embarquées, le système électronique doit pouvoir s'adapter constamment pour garantir des performances en terme de latence et de temps de traitement en fonction des applications, tout en respectant des contraintes d'encombrement.% Même si depuis de nombreuses années, un grand nombre de solutions architecturales ont été proposées pour améliorer l'adaptabilité des unités de calcul, un problème majeur persiste au niveau du réseau d'interconnexion qui n'est pas suffisamment adaptable, en particulier pour le transfert des flux de pixels et l'accès aux données. Nous proposons dans cette thèse un nouveau réseau de communication sur puce (NoC) pour un SoC dédié à la vision. Ce réseau permet de gérer dynamiquement différents types de flux en parallèle en auto-adaptant le chemin de donnée entre les unités de calcul, afin d'exécuter de manière efficace différentes applications. La proposition d'une nouvelle structure de paquets de données, facilite les mécanismes d'adaptation du système grâce à la combinaison d'instructions et de données à traiter dans un même paquet. Nous proposons également un système de mémorisation de trames à adressage indirecte, capable de gérer dynamiquement plusieurs trames image de différentes sources d'image. Cet adressage indirect est réalisé par l'intermédiaire d'une couche d'abstraction matérielle qui se charge de traduire des requêtes de lecture et d'écriture, réalisées suivant des indicateurs de la trame requise (source de l'image, indice temporel et dernière opération effectuée). Afin de valider notre proposition, nous définissons une nouvelle architecture, appelée Multi Data Flow Ring (MDFR) basée sur notre réseau avec une topologie en anneau. Les performances de cette architecture, en temps et en surface, ont été évaluées dans le cadre d'une implémentation sur une cible FPGAModern portable vision systems include several types of image sensors such as colour, low-light or infrared sensor. Such system has to support heterogeneous image sources with different spatial resolutions, pixel granularities and working frequencies. This trend to multiply sensors is motivated by needs to complete sensor sensibilities with image fusion processing techniques, or sensor positions in the system. Moreover, portable vision systems implement image applications which require several images sources with a growing computing complexity. To face those challenges in integrating such a variety of functionalities, the embedded electronic computing system has to adapt permanently to preserve application timing performance in latency and processing, and to respect area and low-power constraints. In this thesis, we propose a new Network-On-Chip (NoC) adapted for a System-On-Chip (SoC) dedicated to image applications. This NoC can manage several pixel streams in parallel by adapting dynamically the datapatah between processing elements and memories. The new header packet structure enables adaptation mechanisms in routers by combining instructions and data in a same packet. To manage efficiently the frames storage required for an application, we propose a frame buffer system with an indirect frame addressing, which is able to manage several frames from different sensors. It features a hardware abstraction layer which is in charge to collect reading and writing requests, according to specific frame indicators such as the image source ID. The NoC has been validated in a complete processing architecture called Multi Data Flow Ring (MDFR) with a ring topology. The MDFR performances in time and area has been demonstrated for an FPGA target
6
Fung, Wing Wah. "Lightly cemented rubber tire chips as highway pavement sub-base and the use of fiber Bragg's grating (FBG) as instrumentation sensors /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202004%20FUNG.
Full text
7
Wirtschafter, Benjamin. "Interféromètre à atomes froids piégés sur puce avec séparation spatiale." Thesis, université Paris-Saclay, 2022. http://www.theses.fr/2022UPASP056.
Full textAbstract:
Depuis plus de 30 ans, de nombreux laboratoires ont développé des expériences de physique atomique permettant de mesurer des accélérations ou des rotations en utilisant des gaz d'atomes manipulés par des champs magnétiques et refroidis par laser. Toutefois, la plupart de ces expériences sont trop encombrantes et remplissent des salles entières. Il est donc nécessaire de réduire drastiquement leur taille afin de pouvoir considérer des applications industrielles aux capteurs à atomes froids en dehors du laboratoire. Bien que de nombreux efforts aient étés réalisés ces dernières années notamment à l'Onera et chez Muquans, la taille du dispositif complet est encore trop imposante pour certaines applications. À la fin des années 90, il a été démontré que des atomes pouvaient être piégés et manipulés sur une puce, permettant ainsi de réduire à la fois la taille et la consommation énergétique de ces capteurs en comparaison d'expériences en laboratoire. C'est dans ce cadre que Thales a commencé à s'intéresser à la réalisation de capteurs inertiels sur puce avec des atomes froids pour la navigation autonome. La technique retenue par notre groupe permet la réalisation de chacune des fonctions nécessaires à l'obtention d'une centrale inertielle sur la même puce atomique. Elle repose notamment sur la séparation spatiale sélective de nuages atomiques dans un piège magnétique via l'habillage d'états internes dans le domaine micro-onde. L'objectif de cette thèse est de concevoir et évaluer la faisabilité de nouveaux types de capteurs inertiels reposant sur l'interférométrie, en utilisant des atomes refroidis piégés au voisinage d'une puce tout au long de la séquence de mesure. Dans le Chapitre 1, nous présentons les applications possibles des interféromètres atomiques et les défis à relever pour miniaturiser ces capteurs et les rendre embarquables, puis nous comparons les performances entre les technologies concurrentes. Le Chapitre 2 est consacré à la description théorique des différentes techniques utilisés dans l'expérience. Le refroidissement des atomes par effet Doppler et le piégeage magnétique sont notamment expliqués, puis nous décrivons une séquence d'interférométrie de Ramsey dans le cas d'une horloge, ainsi que dans le cas d'un accéléromètre, c'est à dire une séquence de Ramsey incluant une séparation spatiale sélective des deux états de l'interféromètre à l'aide d'habillages micro-ondes. Dans le Chapitre 3, nous décrivons l'ensemble du dispositif expérimental et toutes les étapes de préparations du nuage d'atomes depuis la sublimation du rubidium jusqu'au transfert dans le piège d'interférométrie. Nous y décrivons la façon dont on commande l'expérience ainsi que les différents modes de détection des atomes. Dans le Chapitre 4, nous présentons les résultats obtenus durant la thèse. Nous commençons par démontrer des déplacements sélectifs individuels de nuages polarisés dans un des deux états de l'interféromètre, puis des deux à la fois. Nous présentons une méthode originale pour calibrer la position du piège magnétique, puis nous présentons les franges d'interférences obtenus lors de séquences de Ramsey avec séparation spatiale des deux états. Enfin, nous présentons une étude du contraste des franges en fonction de la température du nuage, ainsi que des mesures de variance d'AllanFor more than 30 years, many laboratories have developed atomic physics experiments to measure accelerations or rotations using atomic gases manipulated by magnetic fields and cooled by laser. However, most of these experiments are too cumbersome and fill entire rooms. Therefore, it is necessary to drastically reduce their size in order to be able to consider industrial applications to cold atom sensors outside the laboratory. Although many efforts have been made in recent years, particularly at Onera and Muquans, the size of the complete device is still too large for certain applications. In the late 1990s, it was demonstrated that atoms could be trapped and manipulated on a chip, thereby reducing both the size and power consumption of these sensors compared to laboratory experiments. It is within this framework that Thales has begun to take an interest in producing on-chip inertial sensors with cold atoms for autonomous navigation. The technique adopted by our group allows the realization of each of the functions necessary to obtain an inertial measurement unit on the same atomic chip. It is based on the selective spatial separation of atomic clouds in a magnetic trap via the dressing of internal states in the microwave domain. The objective of this thesis is to design and evaluate the feasibility of new types of inertial sensors based on interferometry, using cooled atoms trapped in the vicinity of a chip throughout the measurement sequence. In Chapter 1, we present the possible applications of atomic interferometers and the challenges to be met to miniaturize these sensors and make them embedded. We then compare the performances between competing technologies. Chapter 2 is devoted to the theoretical description of the different techniques used in the experiment. The cooling of atoms by Doppler effect and magnetic trapping are explained in particular, then we describe a sequence of Ramsey interferometry in the case of a clock, as well as in the case of an accelerometer, i.e. a sequence of Ramsey including a selective spatial separation of the two states of the interferometer using microwave dressing. In Chapter 3, we describe the entire experimental setup and all the preparation steps of the cloud of atoms from the sublimation of rubidium to the transfer into the interferometry trap. We describe there the way in which one controls the experiment as well as the various modes of detection of the atoms. In Chapter 4, we present the results obtained during the thesis. We begin by demonstrating individual selective displacements of polarized clouds in one of the two states of the interferometer, followed by simultaneous displacement of both states. We present an original method to calibrate the position of the magnetic trap, then we present the interference fringes obtained during Ramsey sequences with spatial separation of the two states. Finally, we present a study of fringe contrast as a function of cloud temperature, as well as Allan variance measures
8
Siemes, Kerstin. "Establishing a sea bottom model by applying a multi-sensor acoustic remote sensing approach." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209381.
Full textAbstract:
Detailed information about the oceanic environment is essential for many applications in the field of marine geology, marine biology, coastal engineering, and marine operations. Especially, knowledge of the properties of the sediment body is often required. Acoustic remote sensing techniques have become highly attractive for classifying the sea bottom and for mapping the sediment properties, due to their high coverage capabilities and low costs compared to common sampling methods. In the last decades, a number of different acoustic devices and related techniques for analyzing their signals have evolved. Each sensor has its specific application due to limitations in the frequency range and resolution. In practice, often a single acoustic tool is chosen based on the current application, supported by other non-acoustic data where required. However, different acoustic remote sensing techniques can supplement each other, as shown in this thesis. Even more, a combination of complementary approaches can contribute to the proper understanding of sound propagation, which is essential when using sound for environmental classification purposes. This includes the knowledge of the relation between acoustics and sediment properties, the focus of this thesis. Providing a detailed three dimensional picture of the sea bottom sediments that allows for gaining maximum insight into this relation is aimed at.Chapters 4 and 5 are adapted from published work, with permission:
DOI:10.1121/1.3569718 (link: http://asadl.org/jasa/resource/1/jasman/v129/i5/p2878_s1) and
DOI:10.1109/JOE.2010.2066711 (link: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=5618582&queryText%3Dsiemes)
In reference to IEEE copyrighted material which is used with permission in this thesis, the IEEE does not endorse any of the Université libre de Bruxelles' products or services.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
9
Koshkinbayeva, Ainur. "New photonic architectures for mid-infrared gaz sensors integrated on silicon." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI019.
Full textAbstract:
Les travaux portent sur les multiplexeurs optiques fonctionnant à mi-IR pour la source à large bande dans l'application de détection de gaz. Deux configurations ont été étudiées: réseau de guides d'onde (AWG) et réseau concave planaire (PCG). Premièrement, le principe du fonctionnement a été compris afin de développer une solution analytique pour le champ de sortie en utilisant une approximation gaussienne du champ et de l'optique de Fourier. Ensuite, un outil de simulation semi-analytique de la réponse spectrale pour les deux configurations de multiplexeur a été développé dans MATLAB. La distribution normale des erreurs de phase a été introduite dans le modèle semi-analytique AWG, ce qui nous a permis d'étudier la corrélation entre l'écart-type des erreurs de phase et le niveau de diaphonie de la réponse spectrale AWG. AWG à 5,65 μm a été fabriqué à partir de la technologie SiGe / Si à l'aide de l'outil MATLAB pour le calcul des paramètres de conception et de l'outil P.Labeye pour le calcul de la géométrie AWG. Les dispositifs avec des paramètres légèrement variables ont été caractérisés: AWG1 avec guides d'ondes de 4,6 μm et MMI de 9 μm; AWG2 avec guides d'ondes de 4,6 μm et MMI de 11 μm; AWG3 avec guides d'ondes de 4,8 μm et MMI de 9 μm. Des mesures des dispositifs sur la puce 36 (centre de la plaquette) et sur la puce 32 (côté de la plaquette) ont été effectuées et analysées. Les mesures de température de AWG2 et AWG3 (puce 32 et puce 36) aux points cinq points de température ont montré une dépendance linéaire du déplacement spectral avec la température qui a une bonne corrélation avec les prédictions de simulationThe work focuses on optical multiplexers operating in mid-IR for broadband source in gas sensing application. Two configurations were studies – arrayed waveguide grating (AWG) and planar concave grating (PCG). First, principle of operation was understood in order to develop analytical solution for output field using Gaussian approximation of the field and Fourier Optics. Then, semi-analytical simulation tool of the spectral response for both multiplexer configurations was developed in MATLAB. Normal distribution of phase errors was introduced to semi-analytical AWG model, which allowed us to study the correlation between standard deviation of phase errors and the level of crosstalk of AWG spectral response. AWG at 5.65 µm was fabricated based on SiGe/Si technology using the MATLAB tool for design parameters calculation and P.Labeye’s tool for AWG geometry calculation. Devices with slightly varying parameters were characterized: AWG1 with 4.6 µm waveguides and 9µm MMI; AWG2 with 4.6 µm waveguides and 11µm MMI; AWG3 with 4.8 µm waveguides and 9µm MMI. Measurements of devices on chip 36 (center of the wafer) and chip 32 (side of the wafer) were performed and analyzed. Temperature measurements of AWG2 and AWG3 (chip 32 and chip 36) at points five temperature points showed linear dependence of spectral shift with the temperature which has a good correlation with simulation predictions
10
Nguyen, Dat Son. "Développement des capteurs sans fil basés sur les tags RFID uhf passifs pour la détection de la qualité des aliments." Phd thesis, Université de Grenoble, 2013. http://tel.archives-ouvertes.fr/tel-00951402.
Full textAbstract:
Le but de cette thèse est de développer des capteurs sur la base des tags RFID, des technologies et matériaux disponibles au Vietnam afin de contribuer à résoudre la problématique du contrôle de la qualité des produits alimentaires. En effet la technologie RFID s'est affirmée en importance pour ses applications dans de nombreux domaines. Dans ce contexte, l'identification des produits alimentaires expirés, sans les endommager, est une orientation de recherche très prometteuse. Un tag RFID UHF passif peut aussi être composé de plusieurs puces et plusieurs antennes, chaque couple puce/antenne conçu pour travailler sur un intervalle déterminé de valeur de permittivité. Donc, à partir de l'ensemble des permittivités définies pour chaque couple puce/antenne et les signaux réfléchis vers le lecteur, nous pourrons "mesurer" la permittivité de l'objet tracé. Ainsi la connaissance de la permittivité des aliments et la conception spécifique de l'antenne, nous développerons un tag capteur de type "multi puce/antenne" qui sera utilisé comme un capteur sans fil pour la détection de la qualité des aliments
Books on the topic "SU8 Sensor Chip"
1
Bisutti, Francesca, and Elisabetta Molteni. La corte della Niobe. Venice: Edizioni Ca' Foscari, 2018. http://dx.doi.org/10.30687/978-88-6969-281-9.
Full textAbstract:
La coincidenza delle ricorrenze – l’Università Ca’ Foscari compie 150 anni dalla fondazione e sono passati 100 anni dalla fine della Grande guerra – invita a ricordare la coraggiosa, allora ancora giovane, Scuola Superiore di Commercio, che, alla fine del primo conflitto, è costretta a contare i suoi allievi caduti. Dopo due decenni, nel 1943, il Regio Istituto di Economia e Commercio stabilisce di dedicare la corte minore del palazzo Giustinian dei Vescovi alla memoria di tutti gli studenti, i docenti e i dipendenti caduti nei conflitti che fino ad allora avevano insanguinato il secolo. Monumenti, memorie e lapidi sono, in senso figurato, ricomposti nella statua di Niobe, Mater Studiorum che piange la morte violenta dei propri allievi. La corte della Niobe è abitata dalla potente scultura di Napoleone Martinuzzi, suo fulcro visivo ed emotivo, e da tanti, tanti nomi. Il tentativo è stato quindi di cominciare a restituire non solo la storia di quello spazio ma anche delle esistenze e del pensiero di coloro i cui nomi hanno qui trovato dimora. Questi aspetti della memoria sono stati al centro del lavoro di molti e sottotraccia nel lavoro di tutti: di chi si è occupato di delineare un profilo esistenziale dei caduti, di chi ha studiato le ideologie e le politiche che hanno animato i periodi tribolati delle guerre e dei dopoguerra o ha analizzato i processi istituzionali e la mentalità in tempo di guerra, di chi ha indagato sull’assetto e le trasformazioni architettoniche della corte. Ma il problema del tempo passato, delle tracce che lascia e di come conservarle si è posto anche a chi ha compiuto ricerche sui documenti e a chi ha studiato le pietre del sacrario e ne ha avuto cura.
2
Stark, Denis W. M1 Chip Mac Mini User Guide: A Complete Beginners and Senior Instruction Manual to Learn and Master the Latest Apple M1 Mac Mini with Big Sur. Independently Published, 2020.
Find full textBook chapters on the topic "SU8 Sensor Chip"
1
Carminati, Marco, Pietro Ciccarella, Marco Sampietro, and Giorgio Ferrari. "Single-Chip CMOS Capacitive Sensor for Ubiquitous Dust Detection and Granulometry with Sub-micrometric Resolution." In Lecture Notes in Electrical Engineering, 8–18. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-55077-0_2.
Full text
2
Mele, Filippo. "Application Specific Integrated Circuits for High Resolution X and Gamma Ray Semiconductor Detectors." In Special Topics in Information Technology, 31–42. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-85918-3_3.
Full textAbstract:
AbstractThe increasing demand for performance improvements in radiation detectors, driven by cutting-edge research in nuclear physics, astrophysics and medical imaging, is causing not only a proliferation in the variety of the radiation sensors, but also a growing necessity of tailored solutions for the front-end readout electronics. Within this work, novel solutions for application specific integrated circuits (ASICs) adopted in high-resolution X and $$\upgamma $$ γ ray spectroscopy applications are studied. In the first part of this work, an ultra-low noise charge sensitive amplifier (CSA) is presented, with specific focus on sub-microsecond filtering, addressing the growing interest in high-luminosity experiments. The CSA demonstrated excellent results with Silicon Drift Detectors (SDDs), and with room temperature Cadmium-Telluride (CdTe) detectors, recording a state-of-the-art noise performance. The integration of the CSA within two full-custom radiation detection instruments realized for the ELETTRA (Trieste, Italy) and SESAME (Allan, Jordan) synchrotrons is also presented. In the second part of this work, an ASIC constellation designed for X-Gamma imaging spectrometer (XGIS) onboard of the THESEUS space mission is described. The presented readout ASIC has a highly customized distributed architecture, and integrates a complete on-chip signal filtering, acquisition and digitization with an ultra-low power consumption.
3
OLIVEIRA, S. N., M. E. R. M. C. MATA, M. C. S. CAMELO, A. G. C. ROSAL, and M. E. M. DUARTE. "Estudo do encolhimento de chips de batata doce processados pelo método combinado de secagem e fritura." In A indústria de alimentos e a economia circular: alimentando uma nova consciência. Agron Food Academy, 2021. http://dx.doi.org/10.53934/9786599539640-36.
Full textAbstract:
A batata-doce é uma dicotiledônea, pertencente à família botânica Convolvulaceae, gênero Ipomoea e espécie Ipomoea batatas (L.) Lam, possivelmente originária das Américas Central e do Sul, sendo encontrada desde a Península de Yucatan, no México, até a Colômbia. Afim de valorizar a cultura da batata doce, aliando-a ao desenvolvimento de produtos alimentícios em consonância com os avanços industriais, este trabalho tem como objetivo elaborar chips de batata doce com diferentes espessuras e estudar o encolhimento que ocorre no processo combinado de pré-secagem em estufa mais fritura por imersão em óleo vegetal, ocasionam na cinética. Neste estudo foram avaliados chips com espessuras de 0,75; 1,25 e 1,75mm, e as temperaturas utilizadas no processo de secagem foram de 60, 70 e 80°C. Foi avaliado também o índice de expansão volumétrico do processo combinado de secagem seguido de fritura. Houve a expansão dos chips nos segundos iniciais do processo de fritura, expansão atribuída ao óleo introduzido no alimento durante o processo. Os chips de menor espessura (0,75mm) apresentaram maior índice de expansão para todas as temperaturas utilizadas como pré-tratamento.
4
Oliveira, S. N., M. E. R. M. C. Mata, A. G. C. Rosal, M. C. S. Camelo, and M. E. M. Duarte. "MODELAGEM CINÉTICA DA SECAGEM DE CHIPS DE BATATA DOCE." In A Indústria de Alimentos e a Economia Circular: Alimentando uma Nova Consciência. Agron Food Academy, 2022. http://dx.doi.org/10.53934/9786599539640-38.
Full textAbstract:
A batata-doce (Ipomoea batatas L.) é um tubérculo perecível em que a expansão da cultura é restringida por falta de alternativas para sua industrialização. No sentido de valorizar a cultura da batata doce, aliando-a ao desenvolvimento de produtos alimentícios, essa pesquisa foi realizada com o objetivo de desenvolver técnicas para obtenção de chips de batata doce utilizando-se diferentes processos de secagem. Foram testadas três espessuras de chips, 0,75, 1,25 e 1,75mm, e os métodos de produção foram através de secagem em estufa com circulação de ar por 6h nas temperaturas de 60,70 e 80°C. Os dados obtidos no processo de secagem foram tratados segundo os modelos de Page, Henderson e Pabis e Cavalcanti Mata, sendo obtidos também dados referentes ao encolhimento dos chips durante o processamento, os quais foram tratados pelos modelos de Suzuki, a fim de se obter o coeficiente de encolhimento (n) para cada tratamento. Desta pesquisa, as principais conclusões foram: que a espessura dos chips e a temperatura interferem no processo de secagem, quanto menor a espessura e maior a temperatura, maior foi a remoção de água no processo. Entre os modelos de Page, Henderson e Pabis, e Cavalcanti Mata, o de Cavalcanti Mata representou melhor os dados experimentais de secagem, com coeficiente de correlação superior a 0,99, enquanto que o modelo que melhor se ajustou aos dados de encolhimento para os chips de batata doce desidratados por 6h foi o modelo Uniforme 2 com coeficiente de correlação próximo à 1.
5
GARCIA, M. F. M., M. F. LOPES, R. N. LIMA, V. G. LIMA, and V. L. M. SILVA. "UTILIZAÇÃO DO MÉTODO DE REDE CHECK-ALL-THAT-APPLY (CATA) E ACEITAÇÃO SENSORIAL DE CHIPS DE COCO CONDIMENTADOS." In Produção Animal e Vegetal: Inovações e Atualidades - Volume 2. Agron Food Academy, 2022. http://dx.doi.org/10.53934/9786585062039-54.
Full textAbstract:
Os coqueiros foram introduzidos no Brasil através da Bahia, denominados Coco-da-baía, e inicialmente se expandiram ao longo do litoral nordestino, onde estão localizados os principais produtores nacionais Bahia, Sergipe e Ceará. Além disso, desse fruto se aproveita da casca à polpa, onde encontra-se diversos nutrientes. O objetivo do trabalho foi elaborar diferentes formulações de chips de coco com adição de especiarias e avaliar sua aceitação sensorial. As polpas dos cocos foram cortadas em chips, temperados em quatro formulações diferentes, sendo elas F1 (Tempero Dona Lita) F2 (Orégano + Curry), F3 (Chimichurri + Páprica doce) e F4 (Tempero Dona Lita + Páprica), submetidos a desidratação em estufa a 140°C durante 40 minutos. O perfil sensorial foi determinado através do método CATA. O teste de aceitação sensorial foi avaliado utilizando escala hedônica para os atributos sensoriais cor, aparência, aroma, sabor, textura e aceitação global. A preferência entre as amostras foi avaliada por teste de ordenação, a intenção de compra utilizando-se a escala de cinco pontos, em que 5 representa “certamente consumiria” e 1 “certamente não consumiria”. Os chips de coco condimentado foi bem aceito sensorialmente, sendo as quatro formulações aceitas pelos provadores com notas superiores a 7 em todos os parâmetros. Para o teste CATA a formulação F1 apresentou com maior frequência os atributos de aparência temperada e sabor de tempero, F2 aroma salgado e agradável, F3 a textura ideal, aroma de tempero, sabor de tempero e picante e a F4 apetitosa, sabor agridoce, agradável e textura mole.
6
Santos, Cochiran Pereira dos, Antônio Carlos de Oliveira, Heli Lucas Santos Pinto, Adriana de Jesus Santos, and Marcos Antonio Passos Chagas. "PROPOSTA EXPERIMENTAL PARA A DETERMINAÇÃO DA RESISTIVIDADE ELÉTRICA DE MATERIAIS E SEU COMPORTAMENTO EM FUNÇÃO DA TEMPERATURA." In Engenharias - Automação, Robótica, Metrologia e Energia - Volume 2: estudos e tendências, 150–60. Editora Científica Digital, 2023. http://dx.doi.org/10.37885/230512956.
Full textAbstract:
A maioria dos circuitos elétricos possui resistores para controlar a passagem de corrente em várias de suas partes, como os incorporados a chips em circuitos integrados, sendo os de filme de carbono e filme metálico os tipos mais comuns. O valor da resistência de um resistor depende de sua geometria e resistividade, podendo ser determinada pela lei de Ohm, enquanto a temperatura é o único fator que faz com que sua resistividade varie. No caso dos metais, a resistência é diretamente proporcional ao aumento da temperatura, mas certos materiais, como os semicondutores, diminuem sua resistência à medida que a temperatura aumenta, fato muito importante em várias aplicações da Física e Engenharia. O objetivo deste trabalho é propor um experimento para analisar o comportamento da resistividade elétrica de resistores quando submetidos a diferentes temperaturas por meio de um método simples e prático. A metodologia consiste em realizar leituras da resistência elétrica de resistores de filme de carbono e filme metálico em três temperaturas distintas: à temperatura ambiente, resfriados em nitrogênio líquido (-196 °C) e aquecidos a 324 °C, proporcionando um gradiente de temperatura de 520 °C. Os resultados de resistividade elétrica determinados a partir da resistência elétrica plotados em função da temperatura seguem o comportamento teórico previsto em relação ao material constituinte, e a variação observada nesses valores mostra que os dados possuem coerência, corroborando desta forma o processo e tornando viável a aplicação deste experimento a uma gama extensa de interessados, podendo contribuir em muito no ensino desse tema e sua correlação às mais diversas engenharias.
Conference papers on the topic "SU8 Sensor Chip"
1
Zheng, Xiao-Hu. "Research and Fabrication on Eddy Current Sensor Based on UV-LIGA." In 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21067.
Full textAbstract:
An analytical model of an eddy current sensor designed for noncontact distance measurement was presented. The device consists of two planar coil (driver coil and pickup coil) stacked on the magnetic core. The planar coil fabricated by UV-LIGA technology with SU8 photoresist was illustrated, and the permalloy magnetic core electroforming process was presented also. Tested with 10–50KHz sine signal, the output voltage on the sensing coil rearched 30mv with an stainless target placed at a distance of 10μm, and the experimental showed a linear relation between the distance and output voltage within 50μm distance. The whole size of the device was: Φ5mm × 1.5 mm. The results demonstrated that the device could nondestructive evaluate the distance and be easily integrated on chip.
2
Mohammadi, Abdolreza R., and Mu Chiao. "A Simple Method for Adhesive Bonding of Capacitive Pressure Sensors." In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-39123.
Full textAbstract:
We have developed a simple, low cost technique using new materials to bond capacitance pressure sensors. The old methods have difficult processes when a metal trace on the bonding area perturbs the sealing. The new method uses a polymeric gap-controlling block between glass and silicon wafers and a heat curing adhesive which penetrates between them due to capillary force. We used two different materials including SU-8™ and UV (ultraviolet) curing adhesive in order to control the gap. The technique allows us to generate a small gap between the chips due to low viscosity of the heat curing adhesive, align and bond chips immediately, make a strong bond, and easily seal the sensor. Also, the high temperature, strong heat curing adhesive makes the sensor suitable for high temperature and high pressure applications. The sensors were tested up to 2 MPa and 170°C in a nitrogen chamber. The maximum thermal error of ±1.74% and ±1% full scale output (FSO) were measured for SU-8 and UV sensors, respectively.
3
Lemke, Benjamin, Oliver Paul, Shankar Ganapathysubramanian, Patrick Nardi, and Rajashree Baskaran. "Stress Mapping Below Flip-Chip Bumps With High Spatial Resolution Using Piezoresistive CMOS Sensors." In ASME 2011 Pacific Rim Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Systems. ASMEDC, 2011. http://dx.doi.org/10.1115/ipack2011-52124.
Full textAbstract:
This paper presents a CMOS stress sensor chip including arrays of piezoresistive sensor elements with high spatial resolution sensitive to the in-plane stress components σxx – σyy and σxy, to the out-of-plane stress σxz and σyz, and to the normal stress sum σΣ = (σxx + σyy)/2 − σzz. For the first time, an application of novel vertical stress sensors is presented, measuring the mechanical stress distributions below electroless nickel (eNi) bumps subject to lateral shear forces and vertical compression. All measured stress values are linearly proportional to the applied forces. The vertical shear stress sensors resolve residual vertical shear stresses of up to 51 MPa in the shear experiments. An adjustable numerical model is established assuming two different Young’s moduli of silicon nitride (SiN) emulating the adhesion between the SiN and eNi. Qualitative agreement of the in-plane stress distributions between experiment and numerical simulation is found in the shear and compression experiments, while good correlation for σΣ is found only for temperature uncompensated stress values in the compression test. The modeling of the absolute values shows differences to the experimental data of about ±30%.
4
Li, Pengfei, Nan Lei, Jie Xu, and Wei Xue. "A Lab-on-a-Chip Device Using a Dielectrophoresis-Aligned Carbon Nanotube Sensor Array." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62814.
Full textAbstract:
Here we report the design, fabrication, and characterization of a lab-on-a-chip device using a nanotube-based sensor array. The microfluidic components are composed of an ultraviolet (UV) light-defined, cross-linked SU-8 microchannel and a polydimethylsiloxane (PDMS) top cover. The hybrid microfluidic structure provides a fully sealed microchannel, well-aligned features, and precisely positioned nanosensors. Well-organized single-walled carbon nanotube (SWNT) thin films are deposited and aligned across the electrodes on a silicon substrate with dielectrophoresis. The assembly of SWNTs is carried out in a sealed microchannel. The SWNT devices are configured as two-terminal resistor-type sensors with the metal electrodes as the probing pads and the dielectrophoretically captured SWNTs as the sensing elements. The SWNT devices are used as integrated flow sensors to monitor the flow rate in the microchannel. In addition, when exposed to aqueous solutions with various pH values, these sensors change their resistance accordingly and demonstrate high sensitivity towards pH solutions.
5
Köck, A., E. Brunet, G. C. Mutinati, T. Maier, and S. Steinhauer. "Chip-to-chip SnO2 nanowire network sensors for room temperature H2 detection." In SPIE Defense, Security, and Sensing. SPIE, 2012. http://dx.doi.org/10.1117/12.919096.
Full text
6
Nasseraddin, Connor, Jaime Gonzalo Flor Flores, Talha Yerebakan, Jim Solomon, Andrey Matsko, and Chee Wei Wong. "Sub-Hertz Reciprocal Frequency Readout for Chip-Scale Optomechanical Inertial Navigation." In CLEO: Applications and Technology. Washington, D.C.: Optica Publishing Group, 2023. http://dx.doi.org/10.1364/cleo_at.2023.atu4i.8.
Full textAbstract:
We further our work on precision optomechanical inertial sensing by designing an integrated frequency counter for RF readout of our inertial sensor. We implement signal conditioning and frequency-to-digital conversion, obtaining a sub-Hertz measurement resolution.
7
Teman, Adam, Orly Yadid-Pecht, and Alexander Fish. "An Improved AB2C scheme for leakage power reduction in image sensors with on-chip memory." In 2009 IEEE Sensors. IEEE, 2009. http://dx.doi.org/10.1109/icsens.2009.5398197.
Full text
8
Zhang, Xin, Yingxin Li, Yulong Zhang, Zuhui Chen, Shi Liu, Richard D. Nelson, and John C. LaRue. "Design of Microcontroller Based Test Bench for a Multichannel Integrated Biosensor Chip." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206841.
Full textAbstract:
The planar microelectrode array (pMEA) is an important tool for non-invasive recording in the fields of neuroscience and biosensing. It can be used for extra-cellular measurement of the induced voltage on an electrode underneath a cell upon the occurrence of an action potential. With the principle of capacitive coupling, the sensed electrode signal amplitudes typically range between 100 μV and 1 mV, depending on the cell type. Due to the small amplitude of original neural signals, signal conditioning and processing microelectronics units are necessary to integrate with the pMEA sensor for achievement of best measurement performance. Introducing fully customized ASIC into the microelectrode array substrate provides an efficient solution, which establishes the possibility of creating the biosensor system on chip (SoC) with a large number of sensing-sites for simultaneous measurement without introducing significant noise from the signal conditioning and processing circuitry [1]. In this research work, we have developed a fully customized biosensor chip for sensing the propagation of action potentials. With the paralleled multiple sub-circuits, this prototype multi-site planar microelectrode array biosensor integrates 24 (4 × 6) microelectrode array sensing sites, 24 parallel analog neural signal buffers and a shared OTA based high gain amplifier on the same substrate. Figure 1 depicts the biosensor chip architecture and the functional blocks of the biosensor system setup. The prototyped biosensor chip was fabricated by MOSIS using AMI C5 0.5μm, double poly, triple metal layer CMOS technology. The electroless gold plating process post-CMOS processing and packaging techniques were applied to the biosensor chip to promote the biocompatibility and stability in the aqueous cell culture environment. To interface the biosensor chip with PC, a microcontroller based electronic system is necessary to implement the functions of A/D conversion, biosensor chip control signal generation, digital signal processing and data/command communication between biosensor chip and GUI software running on PC. In this research work, a Motorola ColdFire MCF5307 microcontroller based electronic system was setup to serve as the interface between the biosensor chip and PC, which realized the full functions listed above. The firmware running on MCF5307 microcontroller was implemented with ColdFire assembly language where on the PC client Matlab platform was chosen to simply the software design work.
9
Tseng, Huan-Jan, Po-Tsang Huang, Shang-Lin Wu, Sheng-Chi Lung, Wei-Chang Wang, Wei Hwang, and Ching-Te Chuang. "28nm 0.3V 1W2R Sub-Threshold FIFO Memory for Multi-Sensor IoT Applications." In 2019 32nd IEEE International System-on-Chip Conference (SOCC). IEEE, 2019. http://dx.doi.org/10.1109/socc46988.2019.1570555748.
Full text
10
Onen, Onursal, Alper Sisman, Patricia Kruk, and Rasim O. Guldiken. "An Urinary Biosensor for Early Stage Ovarian Cancer Detection: Experimental Characterization." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-87850.
Full textAbstract:
In this study, an experimental characterization of a piezoelectric ultrasonic MEMS biosensor for detection of anti-apoptotic protein Bcl-2 in sub ng/ml scale is presented. Bcl-2 is demonstrated to be elevated at different stages of ovarian cancer in urine ranging from 0.5 to 12 ng/ml. Here, shear horizontal (SH) polarized surface acoustic waves (SAWs) were utilized by interdigital transducers (IDTs), which were micro fabricated on piezoelectric ST cut Quartz wafers. SH SAWs were generated and sensed by a pair of IDTs, separated by judiciously designed a delay path in-between with for most effective Bcl-2 capture. The Bcl-2 concentration is characterized with respect to the change in resonance frequency. The target sensitivity for diagnosis and quantifying the stage of ovarian cancer is achieved with successful detection of Bcl-2 levels as low as 0.5 ng/ml. The results are promising for the sensor system to be used in a lab-on-a-chip platform for point of care urinary ovarian cancer monitoring diagnosis.