Дисертації з теми "Vacuum Sensor"
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Blomqvist, Anneli. "Millimeter Wave Radar as Navigation Sensor on Robotic Vacuum Cleaner." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-288146.
Повний текст джерелаHar radar med millimetervågor förutsättningar att vara navigationsutrustning för en robotdammsugare i ett hem? Electrolux robotdammsugare använder för närvarande en ljussensor för att navigera genom hemmet medan den städar. Nyligen släppte Texas Instruments en ny radarsensor med vågor i frekvensområdet 60-64 GHz. Denna studie syftar till att svara om radarsensorn är användbar för inomhusnavigering. Studien testar sensorn med avseende på noggrannhet och upplösning av vinklar och avstånd i områden som är relevanta för inomhusnavigering. Den testar om olika föremål tillverkade av plast, tyg, papper, metall och trä kan detekteras av sensorn. Slutligen testas vad sensorn kan se om den rör sig medan den mäter. Radarsensorn kan positionera roboten, men hinderdetektering omkring roboten är begränsad. För det mesta ligger sensorns absoluta noggrannhet inom 3° för vinklar och omkring 1dm för avstånd över 0,5 m. Upplösningen för en förflyttning av ett objekt är 1° respektive 5 cm, och två objekt måste placeras minst 14° eller 15 cm ifrån varandra för att båda kunna upptäckas. Kommande utmaningar är att ta bort antennstörningar som ger sämre reflektioner inom 0,5 meter och ta reda på det bästa sättet att förflytta sensorn för att förbättra upplösningen.
Antelius, Mikael. "Wafer-scale Vacuum and Liquid Packaging Concepts for an Optical Thin-film Gas Sensor." Doctoral thesis, KTH, Mikro- och nanosystemteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-119839.
Повний текст джерелаQC 20130325
Domenegueti, José Francisco Miras. "Sensor de umidade e vácuo baseado na reflexão interna." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/76/76131/tde-09092014-113655/.
Повний текст джерелаIn the present work we propose the use of a refractometric technique based on the determination of the critical angle for the development of a relative humidity sensor and, in the same application scope, a primary vacuum gauge. The proposed technique takes advantage of the phase difference acquired by the parallel and perpendicular components of a, linearly polarized, light beam undergoing internal reflection, to produce an easily detectable intensity minimum in the reflected profile corresponding to the position of the critical angle. We develop a study about the main theoretical aspects involved in the total internal reflection phenomenon, where we perform some simulations aiming to evaluate the variations of the critical angle angular position from changes on the refractive index. The basic set up used in the experiments consist of a HeNe tunable laser, a polarizer, a semi-cylindrical prism with known refractive index made of flint glass type, a analyzer, a linear CCD and a computer, where the information collected by de CCD were treated by means of a data acquisition program developed on the LabVIEWTM platform. The used program allows the point-by-point monitoring of the changes of the profile reflected from the prism base, in other words, one can monitor all the evolution dynamics of the refractive index of the analyzed sample in real time. To confirm the effectiveness of the technique, we perform measurements of changes of the refractive index of gaseous samples as function of the relative humidity and the pressure. The system has shown enough sensitivity to track changes of the order of 10-5 in units of the index of refraction.
Beermann, Rüdiger [Verfasser]. "Structured Light Sensor with Affine Stereo Camera Pair for Geometry Measurements of High-Temperature Components in Rough Vacuum / Rüdiger Beermann." Garbsen : TEWISS - Technik und Wissen GmbH, 2021. http://d-nb.info/1229012583/34.
Повний текст джерелаSchäfer-Nolte, Eike Oliver [Verfasser], and Jörg [Akademischer Betreuer] Wrachtrup. "Development of a diamond-based scanning probe spin sensor operating at low temperature in ultra high vacuum / Eike Oliver Schäfer-Nolte. Betreuer: Jörg Wrachtrup." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2014. http://d-nb.info/1052894151/34.
Повний текст джерелаRicci, Francesco 1987. "Levitodynamics toward force nano-sensors in vacuum." Doctoral thesis, Universitat Politècnica de Catalunya, 2019. http://hdl.handle.net/10803/666188.
Повний текст джерелаLa levitodinámica estudia la manipulación de micro y nanorresonadores en levitación con el objetivo de controlar su dinámica. Este nuevo campo ha atraído mucha atención en los últimos años gracias a sus prestaciones sin precedentes en términos de factores de calidad mecánica, posibilidad de enfriamiento del centro de masas a temperatura ambiente y altas sensibilidades en la detección de fuerzas. En esta tesis, establezco un sensor de fuerza basado en el uso de una nanopartícula de sílice levitada ópticamente en el vacío que, gracias a su carga, puede ser accionada mediante campos eléctricos. Los dos primeros experimentos discutidos en este trabajo intentan conseguir un conocimiento más profundo y un mayor control del sistema levitado. En primer lugar, se propone y demuestra un nuevo protocolo para la medida de la masa de la partícula en levitación con una precisión del 2% basado en el estudio de la dinámica forzada cuando la partícula es accionada eléctricamente. Este método mejora en más de un orden de magnitud las mediciones de la masa de la partícula en plataformas de pinzas ópticas estándar. Aprovechando este desarrollo, se realiza un segundo experimento para estudiar importantes problemas relacionados con las propiedades físicas y químicas de las nanopartículas utilizadas, con especial interés en su química superficial y en la comprensión de las pérdidas de masa onbservadas debidas a la desorción de agua de las esferas de sílice. Finalmente, gracias a una amplia base teórica en osciladores mecánicos no lineales, investigo la dinámica estocástica biestable de un nanoresonador accionado paramétricamente en el régimen no lineal, discutiendo el potencial de las transiciones estocásticas activadas por ruido externo y la resonancia estocástica como esquemas de detección de fuerza no convencionales.
Torunbalci, Mert Mustafa. "Wafer Level Vacuum Packaging Of Mems Sensors And Resonators." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613015/index.pdf.
Повний текст джерелаC with a v holding time and bond force of 60 min and 1500 N, respectively. On the other hand, bonding on surfaces where 0.15&mu
m feedthrough lines exist can be done at 420º
C with a 100% yield using same holding time and bond force. Furthermore, glass frit bonding on glass wafers with lateral feedthroughs is performed at temperatures between 435-450º
C using different holding periods and bond forces. The yield is varied from %33 to %99.4 depending on the process parameters. The fabricated devices are wafer level vacuum packaged using the optimized glass frit and Au-Si eutectic bonding recipes. The performances of wafer level packages are evaluated using the integrated gyroscopes, resonators, and pirani vacuum gauges. Pressures ranging from 10 mTorr to 60 mTorr and 0.1 Torr to 0.7 Torr are observed in the glass frit packages, satisfying the requirements of various MEMS devices in the literature. It is also optically verified that Au-Si eutectic packages result in vacuum cavities, and further study is needed to quantify the vacuum level with vacuum sensors based on the resonating structures and pirani vacuum gauges.
Bergman, Joel, and Johan Lind. "Robot Vacuum cleaner." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264502.
Повний текст джерелаÄven om robot dammsugare är en välkänd produkt är produktutveckling fortfarande intressant. Bättre sensorer och mer sofistikerade algoritmer och sensorer används i dammsugare. Syftet med denna avhandling var att lära sig mer om olika dammsugare, algoritmer och konstruktioner av robot dammsugare, för att prova idéer och möjliga hitta förbättringar att implementera på demonstranten. Det första arbetet var att göra en marknadsundersökning för att hitta kundens behov och förväntningar. Även att göra en grov design och layout för det mekaniska och elektriska systemet. Budgeteringen för demonstranten var 1000 kr. Kostnaderna översteg inte budgeten eftersom vi använde oss av laser skurna plastplattor, 3D-printade delar och erhöll motorer utan kostnad. Sex olika avhandlingar studerades för att hitta svar på några av frågorna. Avhandlingarna studerade ämnen som körmönster och mönster för att hitta tillbaka till laddstationen. Vissa idéer för körmönster implementerades på demonstranten. Den använda utvecklingsmetoden var iteration av att hitta användbar information, testa komponenter, koder och även den fullständiga demonstranten. De komponenter som användes var likströmsmotor, stegmotorer, ultraljudssensorer, Arduino mega-mikrokontroller, strömbrytare och AA-batterier. De olika komponenterna krävde olika spänningar och stegmotorn använder ett specifikt drivkort.
Stevens, Amy Victoria. "Novel solid electrolyte sensors for the selective detection of hydrocarbons in vacuum." Thesis, University of Cambridge, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608728.
Повний текст джерелаSilva, Elisabeth Mary Cunha da. "Chemical and sensory investigations on the processing and preservation of a lamb product." Thesis, Queen's University Belfast, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324852.
Повний текст джерелаIborra, Bernad María del Consuelo. "Comparison of vacuum treatments and traditional cooking in vegetables using instrumental and sensory analysis." Doctoral thesis, Universitat Politècnica de València, 2013. http://hdl.handle.net/10251/32953.
Повний текст джерелаIborra Bernad, MDC. (2013). Comparison of vacuum treatments and traditional cooking in vegetables using instrumental and sensory analysis [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/32953
TESIS
Matějů, Jan. "Řídicí jednotka pro robotický vysavač." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219701.
Повний текст джерелаDürndorfer, Mario [Verfasser]. "Thermal Micro Sensors for Pressure Measurements in the High, Fine and Rough Vacuum Ranges / Mario Dürndorfer." München : Verlag Dr. Hut, 2017. http://d-nb.info/1140977679/34.
Повний текст джерелаGallo, Antonio. "Magnetic field sensors suitable for high temperature and vacuum operations and for remote handling in harsh environment." Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3427514.
Повний текст джерелаNell’ambito delle tecnologie alternative per la produzione di energia la fusione termonucleare controllata appare la più promettente allo scopo di diminuire la dipendenza mondiale dai combustibili fossili quali il petrolio e il carbone. La ricerca sulla fusione mira allo sviluppo di una nuova fonte energetica nel medio termine e dovrebbe trovare ingegnerizzazione nella seconda metà di questo secolo, affiancando le attuali tecnologie. La ricerca sui tokamak quali JET e ITER e il futuro DEMO, basata sul confinamento del plasma attraverso l’utilizzo di campi magnetici, appare allo stato attuale la più promettente e dovrebbe fornire risultati importanti già nei prossimi due decenni. Nell’ambito della fusione termonucleare controllata grande importanza rivestono le diagnostiche magnetiche, che forniscono informazioni fondamentali sullo stato del plasma e permettono un controllo attivo sulla posizione e la forma dello stesso. Questa tesi si occupa dell’ideazione, sviluppo e produzione di due nuove tipologie di sensori magnetici, adatti al funzionamento in ambienti ostili quali l’interno della camera da vuoto (vessel) di ITER. Tali sensori sono stati ideati per resistere ad alte temperature e ad intensi bombardamenti neutronici e dovranno essere installati dietro la prima parete del vessel, a contatto dello stesso. Si tratta di sensori per campi magnetici aventi una frequenza compresa tra 0.001Hz e 10kHz. La tesi è così strutturata: • Il capitolo 1 fornisce una visione di massima sul problema energetico e descrive i rudimenti teorici della fusione nucleare • Il capitolo 2 introduce il problema delle diagnostiche magnetiche elencando i tipi di sensori utilizzati in macchine esistenti (JET, RFX-mod, JT60), con un approfondimento delle problematiche relative ad ITER • Il capitolo 3 descrive lo sviluppo e la produzione di diversi set di sensori costruiti utilizzando la tecnologia LTCC. Tale capitolo elenca i test e le analisi micrografiche effettuate • Il capitolo 4 descrive lo sviluppo e la costruzione di una serie di sensori costruiti mediante la tecnologia del cavo avvolto usando cavi in rame con isolamento in fibra di vetro denominati POZh • Il capitolo 5 descrive il progetto di una struttura necessaria al supporto di tali sensori (LTCC/POZh) all’interno del vessel di ITER
Kousourakis, Asimenia, and asimeniak@hotmail com. "Mechanical Properties and Damage Tolerance of Aerospace Composite Materials Containing CVM Sensors." RMIT University. Aerospace, Mechanical and Manufacturing Engineering, 2009. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20090506.095922.
Повний текст джерелаUppalapati, Balaadithya. "Design and Analysis of Wafer-Level Vacuum-Encapsulated Disk Resonator Gyroscope Using a Commercial MEMS Process." University of Dayton / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1510764485530995.
Повний текст джерелаScatolini-Silva, Aline Mary [UNESP]. "Características físicas e químicas, sensoriais e microbiológicas de ovos armazenados em diferentes condições de embalagens sob temperatura ambiente." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/104922.
Повний текст джерелаConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Foram realizados 3 experimentos com o objetivo de avaliar as características físicas e químicas, sensoriais e microbiológicas de ovos de casca branca e vermelha, higienizados ou não, e armazenados em diferentes condições de embalagens sob temperatura ambiente. 1.800 ovos de casca branca e 1.800 de casca vermelha foram embalados em três condições de embalagens (filme PVC, vácuo parcial e vácuo parcial com sachês sequestrantes de O2) e armazenados durante quatro períodos (7, 14, 21 e 28 dias). Exceto para as análises microbiológicas de quantificação de bolores e leveduras na casca dos ovos, foi utilizado um delineamento inteiramente casualizado em esquema fatorial 3x2x4+1 (condições de embalagem, higienização ou não, e períodos de armazenamento + testemunha - ovos frescos), com 4 repetições. As médias obtidas foram comparadas pelo teste de Tukey a 5 % de significância. Concluiuse que a qualidade interna dos ovos decresce com o tempo de estocagem de forma mais acentuada nos ovos embalados em filme plástico, já que a condição de vácuo preservou algumas características dos mesmos. E com a higienização, as condições de armazenamento dos ovos em filme de PVC devem ser melhoradas, pois a queda da qualidade interna destes foi a mais afetada. Na análise sensorial, os ovos embalados em filme de PVC foram os que mostraram melhores aceitações em todos os atributos avaliados, independente de terem sido higienizados ou não. Ovos embalados em condição de vácuo com sachê sequestrante de gás oxigênio em relação à contaminação microbiana de suas cascas foram semelhantes aos ovos embalados em filme plástico, que é a forma comercialmente empregada
Three studies were conducted with the aim of evaluating the physical and chemical characteristics, sensory and microbiological of white and redshelled eggs, sanitized or not, stored under different packaging conditions at room temperature. 1.800 white shelled and 1.800 red shelled eggs were packed in three conditions of packaging (PVC film, partial vacuum and partial vacuum with gas sachets O2 absorbers) and stored for four periods (7, 14, 21 and 28 days). Except for microbiologically analysis of quantification of yeasts and molds in eggshell, it was used a completely randomized experimental design in a 3x2x4+1 factorial arrangement (three packaging conditions, sanitized or not, storage period, and control - fresh eggs), with four repetitions. The averages were compared by Tukey test at 5% significance level. It can be concluded that the internal egg quality decreases with storage time sharper in the eggs packed in PVC film, because vacuum has preserved some features of them. With sanitation, the storage conditions of eggs in PVC film should be improved because its internal quality decrease was the most affected. At sensory analyzes the eggs packed in PVC film showed the best acceptances in all attributes, be sanitized or not. And on partial vacuum with oxygen gas absorbers condition had their shells with similar microbial contamination of eggs packaged in plastic film, which is the used commercially
Ford, Tara K. "Interaction of non-meat ingredients on sensory characteristics and chemical characteristics of pork loin chops during vacuum-packaged refrigerated storage." Texas A&M University, 2004. http://hdl.handle.net/1969.1/2687.
Повний текст джерелаGuntupalli, Bhargav. "Nanomaterial-Based Electrochemical and Colorimetric Sensors for On-Site Detection of Small-Molecule Targets." FIU Digital Commons, 2017. http://digitalcommons.fiu.edu/etd/3488.
Повний текст джерелаScatolini-Silva, Aline Mary. "Características físicas e químicas, sensoriais e microbiológicas de ovos armazenados em diferentes condições de embalagens sob temperatura ambiente /." Jaboticabal : [s.n.], 2010. http://hdl.handle.net/11449/104922.
Повний текст джерелаAbstract: Three studies were conducted with the aim of evaluating the physical and chemical characteristics, sensory and microbiological of white and redshelled eggs, sanitized or not, stored under different packaging conditions at room temperature. 1.800 white shelled and 1.800 red shelled eggs were packed in three conditions of packaging (PVC film, partial vacuum and partial vacuum with gas sachets O2 absorbers) and stored for four periods (7, 14, 21 and 28 days). Except for microbiologically analysis of quantification of yeasts and molds in eggshell, it was used a completely randomized experimental design in a 3x2x4+1 factorial arrangement (three packaging conditions, sanitized or not, storage period, and control - fresh eggs), with four repetitions. The averages were compared by Tukey test at 5% significance level. It can be concluded that the internal egg quality decreases with storage time sharper in the eggs packed in PVC film, because vacuum has preserved some features of them. With sanitation, the storage conditions of eggs in PVC film should be improved because its internal quality decrease was the most affected. At sensory analyzes the eggs packed in PVC film showed the best acceptances in all attributes, be sanitized or not. And on partial vacuum with oxygen gas absorbers condition had their shells with similar microbial contamination of eggs packaged in plastic film, which is the used commercially
Orientadora: Hirasilva Borba
Coorientadora: Luciana Miyagusku
Banca: Nadja Susana Mogyca Leandro
Banca: Raphael Lucio Andreatti Filho
Banca: Vera Maria Barbosa de Moraes
Banca: Maria Regina Barbieri de Carvalho
Doutor
Hofman, Jiří. "Testovací metody pro hodnocení radiačních efektů v přesných analogových a signálově smíšených obvodech pro aplikace v kosmické elektronice." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-401588.
Повний текст джерелаFirmino, Marcel Eduardo. "Construção de um sistema experimental para desaceleração de átomos." Universidade de São Paulo, 1991. http://www.teses.usp.br/teses/disponiveis/54/54132/tde-19032009-103705/.
Повний текст джерелаThis work presents the development and test of an experimental set-up which allows to produce a very strong slow motion atomic beam. We discuss the calculation and construction of the solenoid to compensate the Doppler effect arising during the deceleration process, vacuum chambers, the oven which produces the atomic beam and the optical system used. We have studied the Zeeman-tuned technique to slow an atomic beam of sodium atoms. A new technique to study the deceleration which Consist in monitoring the fluorescence along the deceleration path is used, which allow us a direct observation of the process.
Müller, Jan. "Kondenzační technika a odvody spalin." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226844.
Повний текст джерела(10691970), Andrew Strongrich. "MEMS Wireless Sensor Networks for Spacecraft and Vacuum Technology." Thesis, 2021.
Знайти повний текст джерелаJian, Jia-xian, and 簡嘉賢. "Fabrication and Measurement of CMOS MEMS-Based Thermoelectric Vacuum Sensor." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/48574613951290320930.
Повний текст джерела國立高雄應用科技大學
光電與通訊工程研究所
102
This paper presents the measurement and the fabrication of thermocouple vacuum sensors fabricated by a low cost CMOS process and MEMS technology. The thermocouple vacuum sensors have two types of suspended structures with different solid thermal conductance. The vacuum sensor with shorter supporting leads and larger solid conductance was named TP401 and the other one was TP402. Each suspended structure was formed by using <100> silicon anisotropic etching process after the CMOS process and has a polysilicon heater and an aluminum/polysilicon thermocouple pair. The polysilicon heater also serves as a thermistor temperature sensor. The performances of the sensors were characterized in this work. Furthermore, an AC electrical modulation method using a lock-in amplifier was adopted for improving the signal-to-noise ratio of the measurement of the sensors. The thermal conductance of TP401 and TP402 were evaluated as 73.83uW/K and 79.2uW/K according to the ratio of bias heating power to temperature difference between the hot junction and the cold junction of the thermocouple. The thermocouple output voltage was about 13mV as the power of heater was 2.5mW. The thermal time constants of these sensors were also figured out by adopting the measurement of infrared frequency response of the thermocouple vacuum sensors in air and in vacuum respectively. The measurement results show that the thermal time constants of TP402 were 15ms and 220ms at atmospheric pressure and in vacuum environment respectively. The pressure response measurement of the vacuum sensors using DC bias will result in an 8-10mV voltage fluctuation and lower the signal-to-noise ratio. The signal fluctuation could be improved to 0.3mV by using an AC electrical modulation.
Lin, Kuan-Yu, and 林冠宇. "Fabrication of a Vacuum Packaging Capacitive Sensor for Micro-Ring Gyroscope." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/17195874904100597460.
Повний текст джерела國立臺灣大學
應用力學研究所
99
In this research, a micro-ring vibratory gyroscope with grid-like masses was fabricated on a (111) single-crystal silicon wafer by MEMS technology. The base and the electrode sensing layer of the gyroscope were fabricated with Corning Pyrex #7740 glasses. The gyroscope can be used to measure any object’s rotational information through differential motions between grid-like masses and the electrode sensing layer. The frequency-offset problem was solved by using (111) silicon to fabricate the gyroscope. However, due to the high density of atomic arrangement in (111) silicon, fabricating processes were difficult. The ICP was used to fabricate the main part of the gyroscope and ring oscillator. The anodic bonging process was used to bond (111) silicon and glasses. The SiOG process was used for the gyroscope packaging process. To ensure the internal part of gyroscope was in vacuum, the SiOG process must be done under vacuum environment. With such procedure, interferences between air resistances and ring oscillator’s motions can be avoided, and the sensitivity of the gyroscope can be enhanced.
Lin, Che-Yu, and 林哲宇. "Development of clamped-clamped beam type piezoelectric sensor for vacuum pressure measurement." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/45619720375140636940.
Повний текст джерела國立中興大學
機械工程學系所
100
In this thesis, a clamped-clamped beam type piezoelectric vacuum pressure sensor was developed. The piezoelectric beam fixed at both ends consists of a PZT layer perfectly bonded to the copper substrate. The dimensions of the PZT layers and copper substrate are both 20mm × 5mm × 200μm. Two pairs of electrodes cover the surfaces of the PZT at the bottom and top layers near both ends. Input voltage was applied at one pair of electrodes to vibrate piezoelectric beam and output voltage was measured at the other pair of electrodes. Experimental results showed that developed pressure sensor has a wide range from 6.5×10-6 to 760Torr. Output voltage generated by vibrations of beams which were varied by viscous gas damping forces acting on the beams in the vacuum. Damping forces can be calculated from damping ratio by half power method experimentally. Damping ratio of sensor includes the effect of strain rate damping and viscous gas damping. The strain rate damping is assumed to be proportional to the bonding stiffness of beam and gas damping is assumed to be changed by the pressure. Experimental results showed that output voltages of sensors were proportional to gas damping ratio. It indicated vacuum pressures can be estimated from output voltage. Vacuum pressures of nitrogen and argon are also compared. Experimental results showed that the gas damping ratio of argon is greater than the damping ratio of nitrogen. Piezoelectric outputs and damping ratios are in the same trend with the vacuum pressures.
Liu, Guo-Yan, and 劉國晏. "The Tin-Lead alloy gas sensor array nanowire manufacturing with die-casting in high vacuum." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/m7ua8d.
Повний текст джерела國立臺北科技大學
機電整合研究所
100
SnO2 is a very common materials used in gas sensor applications, caused by the change of resistance in a reducing atmosphere with the oxygen of the oxide surface adsorption reaction. Has been successfully applied to detect or identify a variety of toxic gases and combustion gases, such as CO, NO2, H2S, C2H6O2, CH4, etc. In this study, the use of vacuum die-casting will hypoeutectic, eutectic and hypereutectic molten tin-lead alloy molten metal cast into the nano template of anodic aluminum oxide(AAO), after curing of the liquid metal, the available array of tin-lead alloy nanowires after heat treatment oxidation array of tin-lead alloy nanowires, use wet etching to remove the template so that the wire bare copper thin films to complete device fabrication. Finally, on top of steamed copper thin films of metal semiconductor gas sensor production. The components of the composition, micro structure and nature of the detection while the Mapping、EDS、SEM、TEM、 XRD and DSC for analysis. The purpose of this study thin film sensor element as a control group, while the array of nanowire sensing element as a design group, the two groups of components in the same testing conditions, comparison of the sensitivity of the carbon monoxide response. Gas detection part is to design the measurement platform, the concentration of gas to be measured by MFC controls, signal measurement and signal data capture their writing LabView, finally confirmed with arrays of nanowire sensing element is much larger than than the surface area of thin film sensing element, therefore, the sensitivity increased substantially, the concentration of 500 ppm carbon monoxide atmosphere, nanowire array sensitivity of the sensing elements arranged in order SnO2(25.13%)>Sn70%-Pb30%(17.83%)>Sn63%-Pb37%(14.89%)>Sn50%-Pb50%(14.02%).
Labello, Jesse M. "Characterization of the Temperature Dependence of Optical Components in a Cryo-Vacuum Chamber used for Space Sensor Testing." 2007. http://trace.tennessee.edu/utk_gradthes/162.
Повний текст джерелаCheng, Chun-Wen, and 鄭鈞文. "Development and implementations of wafer-level process platform with various vacuum conditions for micro sensors integration." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/f75m74.
Повний текст джерелаLiu, Kuan-Chih, and 劉冠志. "The Application of Fiber Optic Sensors for Monitoring Resin Flow Frout in Vacuum Assisted Resin Transfer Molding (VARTM) Process." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/99502062622467237128.
Повний текст джерела臺灣大學
工程科學及海洋工程學研究所
98
The optic fiber is the commonly used in communication, after special processing it can be made a sensing part. At present, fiber optic sensors are applied generally in civil engineering and aeronautics, astronautics engineering for monitoring. The fiber grating sensor unified many merits, for example, the volume is small, the diameter thin and mass is light, not electromagnetic wave disturbance, High transmission, Anti-corrosive, thermostable, easy to embedded in the structure and establish quasi-distributional multiplex monitor network, It’s suitable in the structure strain and the temperature monitoring. Nowadays, composite FRP usually has used to the yacht, aerospace vehicle, windmill rotor structures etc., but tendency of along with the structure of large scale, regarding structure security and quality request, Therefore forewarn monitor of regarding the structure and diagnoses the technology to be important day after day, Because the fiber optical sensor has easy to embedded in structure. So it’s can embed fiber optic sensor in composite structure manufacture in the structure, After the structure formation , advantageously monitor the structure interior condition. This research mainly lies is used fiber grating sensor that applied to Vacuum Assisted Resin Transfer Molding (VARTM) process, fiber grating sensor was embedded between the fabric layers to monitoring the resin flow in composite process, and discusses relations of the fiber grating wavelength change and the resin flow. Practical application resin flow of experiment in thick laminate. Monitoring internal resin flow front in thick laminate. Discussion on experiment result and simulation software analysis result. Serviceability of the confirmation fiber grating sensor monitor resin flow front.
Lynch, Nancy Marie. "Flavor, aroma and color influences on consumer acceptance and flavor profile analysis of polyvinyl chloride and vacuum packaged ground beef." 1985. http://hdl.handle.net/2097/27486.
Повний текст джерела