Development And Test Of High Temperature Surface Acoustic Wave Gas Sensors
DOWNLOAD
Download Development And Test Of High Temperature Surface Acoustic Wave Gas Sensors PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Development And Test Of High Temperature Surface Acoustic Wave Gas Sensors book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Development And Test Of High Temperature Surface Acoustic Wave Gas Sensors
DOWNLOAD
Author : Armando Emilio Ayes Moncada
language : en
Publisher:
Release Date : 2020
Development And Test Of High Temperature Surface Acoustic Wave Gas Sensors written by Armando Emilio Ayes Moncada and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with Acoustic surface waves categories.
Piezoelectric Based Gas Sensors For Harsh Environment Gas Component Monitoring
DOWNLOAD
Author : Chen Zhang
language : en
Publisher:
Release Date : 2019
Piezoelectric Based Gas Sensors For Harsh Environment Gas Component Monitoring written by Chen Zhang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
In this study, gas sensing systems that are based on piezoelectric smart material and structures are proposed, designed, developed, and tested, which are mainly aimed to address the temperature dependent CO2 gas sensing in a real environment. The state-of-the-art of gas sensing technologies are firstly reviewed and discussed for their pros and cons. The adsorption mechanisms including physisorption and chemisorption are subsequently investigated to characterize and provide solutions to various gas sensors. Particularly, a QCM based gas sensor and a C-axis inclined zigzag ZnO FBAR gas sensor are designed and analyzed for their performance on room temperature CO2 gas sensing, which fall into the scope of physisorption. In contrast, a Langasite (LGS) surface acoustic wave (SAW) based acetone vapor sensor is designed, developed, and tested, which is based on the chemisorption analysis of the LGS substrate. Moreover, solid state gas sensors are characterized and analyzed for chemisorption-based sensitive sensing thin film development, which can be further applied to piezoelectric-based gas sensors (i.e. Ca doped ZnO LGS SAW gas sensors) for performance enhanced CO2 gas sensing. Additionally, an innovative MEMS micro cantilever beam is proposed based on the LGS nanofabrication, which can be potentially applied for gas sensing, when combined with ZnO nanorods deposition. Principal component analysis (PCA) is employed for cross-sensitivity analysis, by which high temperature gas sensing in a real environment can be achieved. The proposed gas sensing systems are designated to work in a high temperature environment by taking advantage of the high temperature stability of the piezoelectric substrates.
Gas Sensors
DOWNLOAD
Author : G. Sberveglieri
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Gas Sensors written by G. Sberveglieri and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.
There were two reasons that induced me to plan and to organize this book, the first was the lack of a text entirely devoted to the subject of gas sensors, notwithstanding some books devoted to the various kind of chemical sensors have recently been published. The second reason was the need of introducing the basic topics of gas detection mechanisms to a growing number of researchers active in research and development laboratories of industries and uni versities. The field of chemical sensors is indeed in fast and consistent growth, as it is proved by the increased number of participants to the congresses that were recently held on this subject, namely the Third Meeting on Chemical Sensors (September 24 - 26, 1990, Cleveland), Transducers' 91 (June 24 - 27, 1991, S. Francisco) and EUROSENSORS V (September 30 - October 3, 1991, Rome). Therefore, this book is mainly intended as a reference text for researchers with a MS degree in physics, chemistry and electrical engineering; it reports the last progresses in the R. & D. and in the technology of gas sensors. I choose to deal specifically with the topic of gas sensors because these devices show a very large number of applications in the domestic and industrial field and they are characterized by a great effort of research and development.
Langasite Surface Acoustic Wave Sensors
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2012
Langasite Surface Acoustic Wave Sensors written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
We report on the development of harsh-environment surface acoustic wave sensors for wired and wireless operation. Surface acoustic wave devices with an interdigitated transducer emitter and multiple reflectors were fabricated on langasite substrates. Both wired and wireless temperature sensing was demonstrated using radar-mode (pulse) detection. Temperature resolution of better than ±0.5°C was achieved between 200°C and 600°C. Oxygen sensing was achieved by depositing a layer of ZnO on the propagation path. Although the ZnO layer caused additional attenuation of the surface wave, oxygen sensing was accomplished at temperatures up to 700°C. The results indicate that langasite SAW devices are a potential solution for harsh-environment gas and temperature sensing.
Fabrication Of High Temperature Surface Acoustic Wave Devices For Sensor Applications
DOWNLOAD
Author : Mohd. Nizar Hamidon
language : en
Publisher:
Release Date : 2005
Fabrication Of High Temperature Surface Acoustic Wave Devices For Sensor Applications written by Mohd. Nizar Hamidon and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Surface Acoustic Wave Saw Cryogenic Liquid And Hydrogen Gas Sensors
DOWNLOAD
Author : Brian H. Fisher
language : en
Publisher:
Release Date : 2012
Surface Acoustic Wave Saw Cryogenic Liquid And Hydrogen Gas Sensors written by Brian H. Fisher and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
This research was born from NASA Kennedy Space Center's (KSC) need for passive, wireless and individually distinguishable cryogenic liquid and H2 gas sensors in various facilities. The risks of catastrophic accidents, associated with the storage and use of cryogenic fluids may be minimized by constant monitoring. Accidents involving the release of H2 gas or LH2 were responsible for 81% of total accidents in the aerospace industry. These problems may be mitigated by the implementation of a passive (or low-power), wireless, gas detection system, which continuously monitors multiple nodes and reports temperature and H2 gas presence. Passive, wireless, cryogenic liquid level and hydrogen (H2) gas sensors were developed on a platform technology called Orthogonal Frequency Coded (OFC) surface acoustic wave (SAW) radio frequency identification (RFID) tag sensors. The OFC-SAW was shown to be mechanically resistant to failure due to thermal shock from repeated cycles between room to liquid nitrogen temperature. This suggests that these tags are ideal for integration into cryogenic Dewar environments for the purposes of cryogenic liquid level detection. Three OFC-SAW H2 gas sensors were simultaneously wirelessly interrogated while being exposed to various flow rates of H2 gas. Rapid H2 detection was achieved for flow rates as low as 1ccm of a 2% H2, 98% N2 mixture. A novel method and theory to extract the electrical and mechanical properties of a semiconducting and high conductivity thin-film using SAW amplitude and velocity dispersion measurements were also developed. The SAW device was shown to be a useful tool in analysis and characterization of ultrathin and thin films and physical phenomena such as gas adsorption and desorption mechanisms.
Piezoelectric Composite Based Flexible Printed Acoustic Gas Sensor
DOWNLOAD
Author : Kiran Kumar Sappati
language : en
Publisher:
Release Date : 2021
Piezoelectric Composite Based Flexible Printed Acoustic Gas Sensor written by Kiran Kumar Sappati and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.
"Among different types of gas sensors acoustic wave (AW) gas sensors are of great interest. Flexible printed electronics offer inexpensive and simple fabrication. There is very limited research carried out in developing AW gas sensors based on flexible printed electronics. The main objective of this research is to develop an AW gas sensor that is compact, flexible, highly sensitive, has low frequency operation and supports mass fabrication with roll to roll printing. Lead Zirconate-Titanate (PZT)-Poly dimethylsiloxane (PDMS) based composite thin films are flexible, easy to prepare and possess good piezoelectric and dielectric properties. A simple fabrication technique for preparation of PZT-PDMS thin films is reported. 28 v\% PZT-PDMS corona poled film has achieved a piezoelectric charge constant of 78.33 pC/N with a Young's modulus of around 10 MPa which is suitable for developing AW gas sensor. After that, the surface of the PZT–PDMS composite is treated with plasma treatment for better adhesion with conductive ink. Optimized plasma treatment conditions are achieved by varying plasma parameters such as the pressure and type of gas, gas flow, and time of treatment. Water contact angle measurements, X-ray photoelectron spectroscopy (XPS), and Fourier transform infrared analysis (FTIR) and adhesive tests demonstrate that N2-atmospheric pressure plasma (APP) treatment proves to be the most efficient surface modification technique. Printed conductive patterns on the N2 treated film show strong mechanical stability and great electric conductivity under bending and releasing.AW resonator based on flexural plate wave (FPW) mode is developed using plasma treated PZT-PDMS thin films. The prototype FPW resonator has a resonant frequency of 22.65 MHz with an attenuation of -1.552 dB. The resonator is used for volatile organic compound (VOC) sensing by applying PDMS as sensing layer. Sensitivities with acetic acid and toluene vapor concentrations are measured to be 0.66 and 160.63 kHz/ppm, respectively. The limit of detection for acetic acid and toluene vapor are 10.3 and 0.03 ppm, respectively. Further, the sensor shown good repeatability and response time with both the VOCs. Finally, a FPW gas sensor with differential topology with one input and two outputs is fabricated and employed for temperature compensation. The difference between two output resonant frequencies is considered as the sensor’s differential response. The sensor is applied with MWCNT layer and demonstrated for CO2 monitoring. The sensor successfully compensated temperature effect at two different temperatures at 25 C and 45 C with closer sensitivities. Further, the feasibility of time domain measurement for both 2 port and differential configurations is demonstrated. Finally, the developed prototype sensor has shown good gas sensing capabilities with ability to support R2R printing"--
Development Of High Temperature Gas Sensor Technology
DOWNLOAD
Author : Gary W. Hunter
language : en
Publisher:
Release Date : 1997
Development Of High Temperature Gas Sensor Technology written by Gary W. Hunter and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Presented at the International Gas Turbine & Aeroegine Congress & Exhibition, Orlando, FL, Jun 2-Jun 5, 1997.
Development Of Surface Acoustic Wave Sensors Using Nanostructured Palladium For Hydrogen Gas Detection
DOWNLOAD
Author : Amol V. Chaudhari
language : en
Publisher:
Release Date : 2003
Development Of Surface Acoustic Wave Sensors Using Nanostructured Palladium For Hydrogen Gas Detection written by Amol V. Chaudhari and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Chemical engineering categories.
The Design And Construction Of A Test Rig For Surface Acoustic Wave Gas Sensors
DOWNLOAD
Author : A. R. M. Przybylko
language : en
Publisher:
Release Date : 1987
The Design And Construction Of A Test Rig For Surface Acoustic Wave Gas Sensors written by A. R. M. Przybylko and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with categories.