Дисертації з теми "Development of Sensors"
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Doepke, Amos. "Development of electrochemical sensors and sensor systems." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1337957955.
Повний текст джерелаBenton, Erin Nicole. "Development and Testing of Gold(I) and Europium(III) Based Sensors for Environmental Applications." Thesis, University of North Texas, 2019. https://digital.library.unt.edu/ark:/67531/metadc1505138/.
Повний текст джерелаJennings, Laura. "Development of versatile luminescent sensors." Thesis, Durham University, 2018. http://etheses.dur.ac.uk/12892/.
Повний текст джерелаMoulin, Armelle Michelle. "Development of microcantilever based sensors." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624225.
Повний текст джерелаSkinner, Graham A. "Development of novel optical sensors." Thesis, University of Strathclyde, 2011. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=16863.
Повний текст джерелаRoss, Susan E. "DEVELOPMENT OF SPECTROELECTROCHEMICAL WAVEGUIDE SENSORS." University of Cincinnati / OhioLINK, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=ucin971364855.
Повний текст джерелаAvila, Gomez Adrian Enrique. "Development MEMS Acoustic Emission Sensors." Scholar Commons, 2017. https://scholarcommons.usf.edu/etd/7392.
Повний текст джерелаAndreoli, Alessandro, and Alessandro Andreoli. "Sensors and algorithms development for body sensor networks in healthcare environment." Doctoral thesis, Università Politecnica delle Marche, 2011. http://hdl.handle.net/11566/241961.
Повний текст джерелаWith the wide diffusion and popularity of laptops, cell-phones, Personal Digital Assistants (PDAs), GPS devices and other intelligent electronic in the post-PC era, computing devices have become more portable, mobile and cheap. Nowadays the electronic in uences the daily life of each man and many tasks hard to do in the past now have become reality and easy to perform thanks to the signi cant advances in technology. From this viewpoint the emergence of wireless sensor networks (WSNs) is essentially the latest trend of Moore's Law toward the miniaturization and ubiquity of computing devices. Wireless sensor networks are used in order to perform activity recognition in heath care eld, the results of this application show how that it is effective in patient's actions monitoring. Moreover an application regarding Heart Rate Variability (HRV)will be presented. This work is based on the analysis of the Rpeak to R-peak intervals (RR-intervals) of the ECG signal in the time and/or frequency domains. Doctors and psychologists are increasingly recognizing the importance of HRV; in fact, a number of studies have demonstrated that patients with anxiety, phobias and posttraumatic stress disorder consistently show lower HRV,even when not exposed to a trauma related prompt. Importantly,this relationship existed independently of age, gender, trait anxiety, cardio-respiratory tness, heart rate, blood pressure and respiration rate. The SPINE-HRV is composed of a wearable heart activity monitoring system to continuously acquire the RR-intervals, and a processing application developed using the SPINE framework. The RR-intervals are processed using the SPINE framework at the base station side through a time-domain analysis of HRV. The analysis provides seven common parameters known in medical literature to help cardiologists in the diagnosis related to several heart diseases. In particular, SPINE-HRV is applied for stress detection of people during activities in their everyday life. Experimentations carried out by monitoring subjects in speci c activities have shown the effectiveness of SPINE-HRV in detecting stress. Currently few research prototypes based on BSNs exist that allow for HRV analysis. However SPINE-HRV represents the fi rst prototype using a wireless chest belt so making the system more comfortable than systems using wired electrodes or handheld devices. Furthermore, because the chest belt is a commercial product for sport and tness activities, it has been designed to be robust against body movements. SPINE-HRV is currently applied to stress detection that is computed through an effective threshold based algorithm. The experimentation of such an application has been carried out on different subjects performing different activities of the everyday life: walking, working at the PC, watching TV, sleeping, and driving. The obtained result are interesting as they show that SPINE-HRV is able to detect stress by performing only a time-domain analysis of HRV with respect to more complex computational methods based on the frequency-domain analysis. Thus, SPINE-HRV can be actually used to detect stress of human beings in real-time. Currently, we are focusing our research efforts in improving the stress analysis algorithm by introducing frequency domain features as well as comparing the obtained results to the clinical blood test for the stress hormone, which has been identi ed by the medical community as the quantitative measurement of the emotional stress level. In the second part of this thesis will be described two smart video transcoder processes in order to develop a media gateway. The aim of this network device is to bring about a conversion of the input bitstream into another one characterized by a different video codec. The codecs involved in the transcoding algorithm are the H.263+ (Annex I) and the H.264 baseline pro le. The scope of this study focuses on the possibility of reusing the Intra modes extracted from the input bitstream. Regarding H.263+ to H.264 transcoding, two different thresholds are evaluated for 4x4 blocks and 16x16 macroblocks: all the incoming modes that lead to costs over threshold are rejected and a re-estimation is performed. Otherwise, the incoming Intra mode is directly passed to the H.264 encoder. On the other hand, all the H.264 Intra modes are mapped into the H.263+ Intra modes and passed to the H.263+ encoder skipping the Intra prediction stage. Performance in terms of PSNR and elaboration time of our algorithms are compared to that of the full transcoding approach. A high correlation with PSNR scores is obtained and a significant reduction of computational burden for both transcoding processes is also achieved. The two video transcoder architectures are proposed in order to perform the H.263+ to H.264 conversion and vice versa. Referring to the rst transcoder, two adaptive thresholds are implemented. Both thresholds, used for 4x4 Intra block mode decision and 16x16 Intra block mode decision, vary according to the overall macroblock cost in order to consider the level of detail of the under-study macroblock. This solution is an innovation relating to the approaches proposed in literature based on the usage of a single xed threshold. We can assert that these algorithms represent a basis for the implementation of a low complexity fast transcoder for real-time applications thanks to the low complexity of the modi cation introduced, and also for the reduced computational burden of the entire trancoding process. In fact, we demonstrate a decrease of about 32% in the overall elaboration procedure using an arbitrary QP. The proposed platform also shows high reliability in terms of perceived quality. This is confi rmed by PSNR evaluations for fast transcoding output. PSNR differences are limited to 0.1 dB for all sequences used in the tests. So, the quality of the full transcoding output is very close to the one obtained by the fast transcoding technique. In addition, the overall increase in the bitrate is less than 12%. The H.264 to H.263+ transcoder uses a mapping between the incoming H.264 modes that is rather different to the one proposed in literature. The obtained results, using several standard sequences and QP, show that the overall quality is the same for the output bitstream obtained by the full transcoder and the proposed smart transcoder algorithm, and the bitrate increase is limited to 9% in the worst case. With this mapping it is possible to cancel the computational burden of the Intra mode prediction process. All these considerations allow us to assert that the proposed algorithm can be used in real-time transcoding architectures. Similar analysis concerning Inter frame pictures are actually under study by the authors in order to reduce the complexity of motion estimation procedure in transcoding architectures.
Escudero, Villa Pedro Fernando. "Development of sensors based in MEMS with mechanochromic response." Doctoral thesis, Universitat Autònoma de Barcelona, 2019. http://hdl.handle.net/10803/671630.
Повний текст джерелаLos sensores nanomecánicos han sido reportados históricamente como una herramienta atractiva para la biodetección debido a su alta sensibilidad, alto rendimiento y alta integración. La mayoría de los sensores nanomecánicos se han fabricado con tecnología basada en silicio, pudiendo integrar miles de sensores en un solo chip. Sin embargo, el desarrollo de este tipo de sistemas implica no solo la fabricación de matrices de transductores mecánicos, que actualmente es un proceso muy establecido y de bajo costo, sino también la implementación de un sistema de lectura para leer independientemente la respuesta de cada transductor. Esta tesis doctoral se centró en el desarrollo de un nuevo enfoque para la detección de la respuesta mecánica de una matriz de sensores mecánicos mediante el uso de instrumentación sencilla. Este enfoque consiste en el desarrollo de sensores mecánicos (microcantilevers y micromembranas) con respuesta mecanocrómica, es decir, sensores mecánicos que cambian su color intrínsecamente ante estimulación mecánica. El desarrollo de sensores basados en MEMS con respuesta mecanocrómica es el resultado de una combinación efectiva de la coloración estructural producida por redes de difracción o cristales fotónicos, con el rendimiento de los transductores mecánicos. Los sensores mecánicos con una nanoestructura periódica dispuesta en una cara del sensor, son fabricados y caracterizados. El color mostrado por los sensores cambia intrínsecamente por la acción de un estímulo mecánico externo (carga de presión o tensión superficial) cuando el transductor se deforma, siendo el cambio de color recogido por el uso de un LED y una cámara RGB de bajo costo. Para llevar a cabo este desarrollo, se realiza un estudio teórico de la física de coloración estructural y de modelos matemáticos que describen el principio de funcionamiento del dispositivo mecanocrómico. Con estos elementos básicos, los materiales mecanocrómicos basados en dos tipos de estructuras fotónicas, redes de difracción 1D y ensamblajes coloidales, son fabricados y caracterizados por espectrometría UV-Visible, identificando los principales contribuyentes del cambio de color (variaciones en el período de la nanoestructura y cambios en el ángulo de iluminación de punto de vista). Estos materiales a continuación son integrados a matrices de sensores mecánicos colorimétricos para ser caracterizados por medio de tensión biaxial. Se fabrica, caracteriza y evalúa una matriz de sensores de presión colorimétricos basados en membranas flexibles nanoestructuradas y suspendidas, libres de marcajes y de alimentación de energía orientado a las aplicaciones optofluídicas multiplexadas. La plataforma muestra una sensibilidad de 0.17 kPa-1 en la detección de presiones neumáticas bajas o de fluidos (en un rango entre -1 y 1 kPa) y se demuestra la idoneidad del método de detección colorimétrico midiendo el cambio de color de las membranas que muestran una sensibilidad de 117 nmkPa-1. Finalmente, se realiza un estudio teórico de un sensor nanomecánico colorimétrico de tensión superficial basado en cantilevers y se demuestra su desempeño en la detección de cambios conformacionales moleculares fotoinducidos. De esta manera, el método de detección es capaz de detectar cambios de 1o en la escala de tono (HSV), o 0.75 nm de longitud de onda en el rango visible (400 nm a 650 nm). El desarrollo de sensores basados en MEMS con respuesta mecanocrómica se presenta como una herramienta útil que cumple con los requisitos para el desarrollo de un dispositivo de punto de atención.
Nanomechanical sensors have been historically reported as an attractive tool for biodetecction due to its high sensitivity, high throughput, and high integration. Most of nanomechanical sensors have been fabricated using silicon based technology being able to integrate thousands of sensors in a single chip. However, the development of this kind of systems involves not only the fabrication of arrays of mechanical transducers, which is currently a well-established and low-cost process, but also the implementation of a read-out system to independently read each transducer response. This Doctoral Thesis focused on the development of a new approach for the detection of the mechanical response of an array of mechanical sensors by using simple instrumentation. This approach consists in the development of mechanical sensors (microcantilevers and micromembranes) with mechanochromic response, i.e. mechanical sensors with an intrinsic tunable colour under mechanical stimulation. The development of sensors based in MEMS with mechanochromic response is a result of an effective combination of the structural coloration produce by diffraction gratings or photonic crystals, with the performance of mechanical transducers. Mechanical sensors with a periodical nanostructuration disposed on one face of the sensor, are fabricated and characterized. The colour displayed by the sensors change intrinsically by the action of an external mechanical stimulus (pressure load or surface stress) when the transducer deflects, being the colour change collected by the use of a LED and a low cost RGB camera. In order to carry out this development, a theoretical study of the physics of structural coloration and the mathematical models that describe the working principle of the mechanochromic device is performed. With these basics, the mechanochromic materials based on two types of photonic structures, linear 1D gratings and colloidal assemblies, are fabricated and characterized by UV-Visible spectrometry, finding the main contributors of colour change (variations in the nanostructure period and changes in the illumination and point of view angle). These materials are then integrated into arrays of coloured mechanical sensors and characterised under bi-axial strain. A label-free and power-free array of colour tunable pressure sensors based on flexible nanostructured suspended membranes is fabricated, characterized and evaluated for multiplexed optofluidics applications. The platform shows a sensitivity of 0.17 kPa^(-1) for the detection of low pneumatic or fluid pressures (in a range between -1 and 1 kPa) and the suitability of colorimetric detection method is demonstrated by measuring the membrane colour change with a sensitivity of 117 nm\/kPa. Finally, a theoretical study of a surface stress colorimetric nanomechanical sensor based in cantilevers is performed and demonstrated its performance for the detection of photo-induced molecular conformational changes. In this case, the detection method is able to detect changes of 1^o in the hue scale (HSV) or 0.75 nm for the visible band in wavelengths (400 nm to 650 nm). The development of sensors based in MEMS with mechanochromic response is presented as a useful tool that fulfils the requirements for the development of a point-of-care device, such as: high sensitivity, low-cost, high throughput, label-free, out of the shelf, disposable, multidetection, and also that does not require a sophisticated detection system.
Moore, Charles Bruce. "The development of in vivo sensors." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296869.
Повний текст джерелаHarvey, Raven Mariah. "Development of genetically encoded heme sensors." Thesis, Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53607.
Повний текст джерелаGreig, Thomas Alexander. "Development of CMOS active pixel sensors." Thesis, Brunel University, 2008. http://bura.brunel.ac.uk/handle/2438/5345.
Повний текст джерелаPolwart, Ewan. "Development of SERS active fibre sensors." Thesis, University of Strathclyde, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249014.
Повний текст джерелаJones, Christopher Peter. "The development of novel electrochemical sensors." Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/46715.
Повний текст джерелаKritzinger, Pieter Christo. "The development of carbon nanostructured sensors." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5389.
Повний текст джерелаENGLISH ABSTRACT: During this research the possibility of using carbon nanostructures in sensors were investigated. Graphene and carbon nanotubes (CNTs) are the nano- structures that were used in the developed sensors. Graphene is a single atomic layer of carbon and a carbon nanotube (CNT) is a rolled up sheet of graphene that forms a tube. The unique structure and incredible properties of both these materials make them ideal to be used in sensory applications. A graphene sensor was developed and experiments were performed to determine whether graphene is a viable candidate to be used in a wide range of sensory applications. The graphene sensor operated successfully as a humidity sensor and this led to the discovery that humidity can be used to control the bandgap in graphene. The absorption of CO2 in graphene was successfully measured using surface acoustic waves. As a result, any gas that graphene absorbs can be detected using this method. The use of graphene in three liquid applications was tested. The graphene showed no potential to be used as a pH sensor or as a ow sensor. An experiment was undertaken to determine whether graphene can increase the e ciency of a water electrolysis process, but it was established that the graphene does not make a signi cant di erence. A CNT gas sensor that identi es a gas based on its ionization characteristics was studied and designed. Due to the insu cient height of the grown CNTs, it was decided to focus on the creation of a model of the sensor that can be used to design it optimally. The results of the experiments con rmed that carbon nanostructures such as graphene and CNTs have potential to be used in future sensing applications.
AFRIKAANSE OPSOMMING: Hierdie navorsing ondersoek die moontlikheid om koolstof-nanostrukture in sensor-apparate te gebruik. Grafeen en koolstof-nanobuisies (KNB) is die nanostrukture wat in die ontwikkelde sensors gebruik is. Grafeen is 'n enkel atomiese koolsto agie en KNBs is 'n opgerolde grafeenlagie wat 'n buisie vorm. Die unieke struktuur en ongeloo ike eienskappe van beide hierdie materiale, maak hulle uiters geskik om in sensor-toepassings gebruik te word. 'n Grafeensensor is ontwikkel en eksperimente is uitgevoer om te bepaal of grafeen 'n goeie kanidaat is om in 'n wye verskeidenheid van toepassings gebruik te word. Die grafeensensor is suksesvol aangewend as 'n humiditeitsensor en dit het gelei tot die uitvindsel dat humiditeit gebruik kan word om die energiegaping in grafeen te varieer. Die absorpsie van CO2 in grafeen is suksesvol gemeet deur oppervlak akoestiese golwe te gebruik. Gevolglik kan enige gas wat grafeen absorbeer op hierdie manier gemeet word. Die gebruik van grafeen is in drie vloeistof-toepassings getoets. Die grafeen het geen potensiaal getoon om as 'n pH-sensor of as 'n vloei-sensor aangewend te word nie. 'n Eksperiment is ook uitgevoer om te toets of grafeen die e ektiwiteit van 'n water-elektroliese proses kan verhoog, maar die resultate het gewys dat dit nie 'n wesenlike verskil maak nie. 'n KNB-gassensor, wat 'n gas identi seer uit die ioniseerings eienskappe van die gas, is bestudeer en ontwikkel. Die lengte van die KNBs wat gegroei is, was onvoldoende en daar is gefokus op die ontwerp van 'n model van die sensor wat gebruik kan word om dit optimaal te ontwerp. Die resultate van die eksperimente het bevestig dat koolstof-nanostrukture soos grafeen en KNB baie potentiaal het om in toekomstige sensor-toepassings gebruik te word.
Gautam, Madhav. "Development of Graphene Based Gas Sensors." University of Toledo / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1365030920.
Повний текст джерелаJones, Erica Nicole. "Development of Biopolymer Based Resonant Sensors." University of Dayton / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1272992841.
Повний текст джерелаBindra, Dilbir Singh. "Development of potentially implantable glucose sensors." Diss., The University of Arizona, 1990. http://hdl.handle.net/10150/185235.
Повний текст джерелаBorràs, Brull Marta. "Development of electrochemical sensors for hydrogen peroxide determination." Doctoral thesis, Universitat Rovira i Virgili, 2020. http://hdl.handle.net/10803/669818.
Повний текст джерелаLa motivación principal detrás de esta tesis es el desarrollo de nuevos sensores (bio)químicos de bajo coste que puedan sentar las bases para el diseño de plataformas de detección robustas, económicamente asequibles, escalables y fáciles de usar. La primera estrategia se basa en la incorporación de polímeros conductores para conseguir un rendimiento analítico mejorado y al mismo tiempo, unas características finales del dispositivo de asequibilidad y sencillez en su uso. La segunda parte abarca la exploración y el desarrollo de sensores para el diagnóstico no invasivo, con el objetivo de mejorar la calidad de vida de los usuarios finales. El trabajo empieza introduciendo la importancia de la detección del peróxido de hidrógeno, incluyendo algunas de sus muchas aplicaciones en distintos campos, i una breve descripción de la estructura de la tesis y sus objetivos. A continuación se presentan algunos de los trabajos más recientes en la detección de peróxido de hidrógeno utilizando polímeros conductores. La comparación del rendimiento analítico así como los retos a afrontar en un futuro también se describen en la tesis. Fruto de estos retos, la primera parte de la tesis se basa en el desarrollo de nuevas estrategias para la determinación de peróxido de hidrógeno en forma de trabajo experimental. La segunda parte enfoca el desarrollo de sensores electroquímicos basados en el uso de enzimas oxidasa para la detección de peróxido de hidrógeno como producto de la reacción principal. Además, se explican también los fundamentos científicos de las técnicas usadas y los principios de detección en los que se basa la tesis.
The main motivation behind this doctoral thesis is the development of novel and low-cost (bio)chemical sensors that can set the basis to design robust, affordable, scalable and user-friendly sensing platforms. The first approach is based on the incorporation of conducting polymers to achieve enhanced analytical performance as well as desirable final device features, such as affordability and simple operation. The second part of the thesis is addressed on the exploration and development of biosensors for non-invasive diagnostics, with the aim of improving the quality of life of potential end-users. The work begins by introducing the importance of the determination of hydrogen peroxide, including some of its several applications in different fields and a brief description of the thesis structure and objectives. It continues by presenting some of the most recent works on hydrogen peroxide detection using conducting polymers. A critical comparison of the analytical performance and some of the future challenges are described. Fruit of these challenges, the first part of the thesis is based on the development of new approaches for such detection in the form of experimental work. The frame of the second part of the thesis points out the development of electrochemical sensors based on enzymes in order to determine hydrogen peroxide as a byproduct of the main oxidase reaction. In addition, some background of scientific foundation, technological methods and principles on which the work stands is also provided.
Maddala, Sasanka, and Veerababu Velugubantla. "Development of a Multi Sensor Android Application." Thesis, Blekinge Tekniska Högskola, Institutionen för matematik och naturvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-20862.
Повний текст джерелаLiu, Yifan. "Development of microcantilever sensors for cell studies." Thesis, Heriot-Watt University, 2013. http://hdl.handle.net/10399/3244.
Повний текст джерелаGao, Xiaobing. "Development of sensors for industrial sewing machines." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0011/MQ52554.pdf.
Повний текст джерелаAhmad, Mohammad. "Development of highly sensitive fibre-based sensors." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.421879.
Повний текст джерелаChan-Henry, Robert Yatshein. "Design and development of electrochemical gas sensors." Thesis, City University London, 1992. http://openaccess.city.ac.uk/7730/.
Повний текст джерелаGodber, S. X. "The development of novel steroscopic imaging sensors." Thesis, Nottingham Trent University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292248.
Повний текст джерелаElliott, Nicholas James. "Development of distributed optical fibre chemical sensors." Thesis, Glasgow Caledonian University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270520.
Повний текст джерелаMd, Noh Mohd Fairulnizal. "Electrochemical sensors development for toxic heavy metals." Thesis, Cranfield University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.422358.
Повний текст джерелаShu, Zhi Xin. "The development of sensors for toxic compounds." Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/38158.
Повний текст джерелаZhang, Sifu. "Development of intravascular sensors with improved Haemocompatibility." Thesis, Keele University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.685727.
Повний текст джерелаWhite, Carl Barry. "Development of carbon-based atomic oxygen sensors." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/342945/.
Повний текст джерелаJoyce, Bryan Steven. "Development of Active Artificial Hair Cell Sensors." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/52911.
Повний текст джерелаPh. D.
Finnemeyer, Valerie A. "Development of Liquid Crystal Infrared Imaging Sensors." Kent State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=kent1463139065.
Повний текст джерелаDing, Binlei. "Development of High Resolution Interferometric Inertial Sensors." Doctoral thesis, Universite Libre de Bruxelles, 2021. https://dipot.ulb.ac.be/dspace/bitstream/2013/317532/4/content.pdf.
Повний текст джерелаDoctorat en Sciences de l'ingénieur et technologie
info:eu-repo/semantics/nonPublished
Andersson, Moa. "Product development and design of industrial sensors." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH. Forskningsmiljö Produktutveckling - Industridesign, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-36113.
Повний текст джерелаIoT-teknologi, Internet of Things, är en snabbt växande marknad, det innebär att mer och mer produkter, kläder, även människor förses med sensorer som i sin tur kan förstå omgivningen och kommunicera, detta för att skapa ett smartare samhälle. För att företag ska kunna vidhålla positionen på marknaden är det viktigt att hela tiden erbjuda produkter med bättre komponenter och mindre till storleken. För skapa en starkare position, företaget borde erbjuda revolutionerande produkter med unika egenskaper. Det är en av de här idéerna som har undersökts i det här examensarbetet. Arbetet har skett under ett samarbete med företaget CombiQ, belägen i Jönköping. Produkten som skulle tas fram var en industriell sensor, som skulle använda sig av IIoT-teknologin, Industrial Internet of Things, som företaget utvecklar. Tidpunkten när det här arbete utfördes, CombiQ hade inga egna produkter men all teknologi som sitter i sensorerna. För att ta fram en industriell sensor för CombiQ behövde inte bara möjligheterna att tillverka en produkt utefter funktionerna undersökas. Varumärket behövde även analyseras för att utveckla en produkt som uttrycker företaget och dess varumärke på rätt sätt. Genom att tillämpa metoder och verktyg från både produktutvecklingsprocesser och designprocesser, kunde ett koncept tas fram som uppfyllde de uppställda kraven och funktionerna. Den huvudsakliga funktionen i sensorn var att produkten skulle bestå av moduler och på det viset kunna justeras utefter vad kunden behöver. Vidare, under projektet har även CombiQ som varumärke undersökts och riktlinjer för designen har tagits fram som reflekterar företaget och dess varumärke. Design riktlinjerna kan användas för att ta fram ytterligare produkter med samma maner, vilket har visats i detta arbete genom att ta fram designkoncept på ytterligare produkter som räknas till samma produktfamilj som sensorn med moduler.
ROCCO, GIULIA MARIA. "Development of Microfluidic Sensors by Additive Manufacturing." Doctoral thesis, Università degli studi di Pavia, 2020. http://hdl.handle.net/11571/1326027.
Повний текст джерелаToday, additive manufacturing (AM) technology is well-known to everybody: each of us has, at least once, heard about that and many have already seen a 3D printer at work. In last years, the cost reduction of 3D printers has meant that AM was no longer used just for rapid prototyping but, also, for the manufacturing of many end-use products. Moreover, its benefits (the material efficiency, the possibility to produce complex shapes in very fast time and at low-cost,...), attracted also the scientists, leading them to use this technology in their research. Recently, 3D-printing made its appearance in the microwave field, and the number of papers presenting devices fabricated with this technology grows every year more. It is within this scenario that my PhD thesis is contributing, being entirely dedicated to 3D-printing technology and its applications in the development of microwave devices. In particular, my work is focused on the realization of microfluidic devices based on resonant cavities. The devices were designed, fabricated, and experimentally verified to demonstrate the potential of merging the microwave field with 3D printed sensing devices. The thesis is organized in six chapters. In the first part, an introductory frame outlines the panorama in which the PhD thesis is situated, together with the state of the art of AM and microfluidics as applied to the microwave field and, eventually, the adopted technologies. The second part, the core of the thesis, deals with the fabricated microfluidic sensors, that is, devices that allow to extract liquids' dielectric properties. The retrieval of liquids properties, i.e., dielectric permittivity and loss tangent, has very important applications in chemical and biological fields. In this work, microfluidic sensors are realized through 3D-printed resonant cavities with a (3D-printed) pipe inside, where liquids under test (LUT) can be injected and their properties extracted. Sensors with two different geometries have been analyzed. The first one consists in a square Substrate Integrated Waveguide (SIW) cavity with a multi-folded pipe inside. In the second structure, instead, the high quality factor of spherical-like shapes is exploited. A pumpkin-shape cavity resonator is fabricated, with a pipe passing, straight, between the two poles. One of the main advantages of AM fabrication is the possibility of emptying both structures, so to minimize as much as possible the dielectric losses due to the substrate. Moreover, the pumpkin structure, realized with a 2 mm-thick dielectric shell, was metallized in the inner part, thanks to electroplating. This guaranteed an increase in quality factor, especially if compared with the square structure. Both these structures were tested with nine different liquids, consisting of mixtures of water and isopropanol. To extract dielectric permittivity and loss tangent of the LUTs, the shift in the resonant frequency on one hand and the change of the quality factor on the other hand, have been considered. In particular, the procedure for the extraction of the dielectric permittivity has been improved, with respect to what can be read in literature, and also a novel method for the extraction of the loss tangent is proposed. The intention to create a self-sustained device for the retrieval of LUTs properties, is then pointed out. Such an investigation has culminated in the realization of an oscillator based on the aforementioned 3D-printed resonator. The design of the oscillator was performed in such a way to obtain an output signal with a working frequency similar to the resonator one and dependent on the LUT injected in the cavity. With a spectrum analyzer, the oscillation frequency was measured in different cases, and the permittivity of the different LUTs was obtained with good accuracy.
Garoli, Denis. "Development of Sensors for Ultraviolet Radiation Monitoring." Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3425004.
Повний текст джерелаAbhijith, N. "Semi Conducting Metal Oxide Gas Sensors: Development And Related Instrumentation." Thesis, Indian Institute of Science, 2006. https://etd.iisc.ac.in/handle/2005/281.
Повний текст джерелаAbhijith, N. "Semi Conducting Metal Oxide Gas Sensors: Development And Related Instrumentation." Thesis, Indian Institute of Science, 2006. http://hdl.handle.net/2005/281.
Повний текст джерелаPino, Flavio. "Development of nanomaterials for environmental monitoring." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/325142.
Повний текст джерелаEnvironmental monitoring based on biosensing systems has increased its relevance not only in the research field but also in the real industrial application. This is due to the advantages of such analytical platforms especially their simplicity and their cost/efficiency. Moreover, the recent advances in nanoscience and nanotechnology increase the emerging of new nanomaterials which have interesting electrical properties such as their capacity to improve the electrode conductivity. This has a particular interest in the development of electrochemical biosensing systems. The combination of nanomaterials with electrochemical biosensing platforms can build up powerful analytical tools for the environmental monitoring. This represents the main objective of this PhD Thesis, that divided in six chapters describes the development and application of three new biosensing platforms for environmental monitoring using nanomaterials. The first chapter of the thesis gives a general introduction on environmental monitoring of pollutants and offers a brief description and classification of these compounds. This chapter also gives an overview of the relevance of the use of nanomaterials in biosensing systems for environmental monitoring with a detailed review of the last published works describing also their innovation aspects and also the possible drawbacks. In Chapter 3 the biosensing platform for environmental monitoring based on the inhibition of acetylcholinesterase is described. The developed system uses magnetic beads and acetylcholinesterase enzyme over Boron Doped Diamond Electrode. Moreover, through the use of magnetic beads and the surface characteristics of the electrode, this platform is used as multi use system with high reproducibility able also to measure the pesticide chlorpyrifos in real sample (Yokoama river, Japan). In Chapter 4 a simultaneous detection system of pollutants for catechol (a phenol derivative) and chlorpyrifos (an organophosphate pesticide), is developed. Such sensing is achieved through a SPCE modified with IrOx NPs and tyrosinase. The proposed biosensor reports improvement in the sensitivity for catechol compared to previously reported biosensors. This biosensor shows also a high sensitivity for chlorpyrifos while being used in a tyrosinase inhibition mode operation. Finally the efficiency of this biosensor is explored for real applications in river and tap water showing great possibilities for future application as a low cost platform. In Chapter 5 a free enzymatic bio-sensing system based on CuO nanoparticles for detection of phenols compounds and for a high toxic herbicide (Diuron) is proposed. Such sensing is achieved through a SPCE where CuO NPs create a stable complex with phenolic compounds that are measured through electrochemical reaction at electrode surface. Moreover it is one of the first applications using CuO NPs for environmental monitoring. CuO NPs have the function to mimic the active centre of tyrosinase obtaining results comparable with other enzymatic platforms. This analytical platform can be used for real sample applications due to the fact that the detection limit is within the requested levels of monitoring established by the legislation. Annex A shows a very interesting review over the biosensing systems inenvironmental monitoring using nanomaterials. This review was published in a very high impact factor journal (Chemical Review Impact factor of 46.658).
Wei, Yu Zhang. "Design and development of new micro-force sensors." Thesis, University of Macau, 2017. http://umaclib3.umac.mo/record=b3691170.
Повний текст джерелаJebelli, Ali. "Development of Sensors and Microcontrollers for Underwater Robots." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31283.
Повний текст джерелаOshima, Yoshinobu. "Development of Monitoring Systems Using Fiber Optic Sensors." 京都大学 (Kyoto University), 2003. http://hdl.handle.net/2433/77756.
Повний текст джерелаGriffiths, David John. "Development of Ionic Polymer Metallic Composites as sensors." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/35676.
Повний текст джерелаMaster of Science
Meenakshisundaram, Guruguhan. "Development of novel implantable sensors for biomedical oximetry." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1217427728.
Повний текст джерелаAnderson, Henrik. "Development of Electroacoustic Sensors for Biomolecular Interaction Analysis." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-107211.
Повний текст джерелаLeibl, Nadja. "Development of molecularly imprinted polymers for chemical sensors." Thesis, Compiègne, 2018. http://www.theses.fr/2018COMP2446.
Повний текст джерелаThis thesis proposes a rational design approach towards molecularly imprinted polymers (MIPs) for sensing nitro-explosives. Molecularly imprinted polymers are mimicking biological molecular recognition. They have the advantage to be stable in harsh environments and can be tailored into different physical forms for interfacing with transducers. Their synthesis is based on the co-polymerization of functional and cross-linking monomers in the presence of the target analyte or, as in this thesis, with a structural analogue leading to a rigid three-dimensional polymer network with binding sites complementary to the template in size, shape and position of the functional groups. The choice of the functional monomer was carried out with a rational design approach combining molecular modelling, nuclear magnetic resonance (NMR) and isothermal calorimetry (ITC) studies. This allows to optimize the pre-polymerization mixture in order to get strong complexation between the functional monomer and the template. The obtained results were confronted with binding studies performed on synthesized polymers. The thus designed polymer formulation was interfaced with transducer surfaces in form of nanoparticles, films and nanoparticles embedded into electro-polymerized polydopamine films. In addition to the traditional MIPs by free radical polymerization, molecularly imprinted in-situ electro-polymerized polydopamine films were investigated as an alternative approach for sensing nitro-explosives electrochemically
LOMBARDO, LUCA. "Development and characterization of sensors for human health." Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2774813.
Повний текст джерелаAmakubo, Suguru Frederick. "Carbon electronics : nano-carbons for the development of radiation sensors, image intensifiers and medical sensors." Thesis, University College London (University of London), 2017. http://discovery.ucl.ac.uk/10024912/.
Повний текст джерелаJahangir, Jahanbeen. "Development of sensor systems for application in cryopreservation." Thesis, University of Bedfordshire, 2014. http://hdl.handle.net/10547/556475.
Повний текст джерелаDiamond, D. "Ubiquitous sensing - the development of analytical measurements." Thesis, Queen's University Belfast, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246459.
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