Results 251 to 260 of about 139,964 (303)
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Saw resonator temperature sensor
Sensors and Actuators A: Physical, 1992Abstract The temperature dependence of a SAW resonator is used to determine temperature. The high linearity of the frequency shift with temperature makes it possible to achieve a high resolution and a high stability with a simple oscillator circuit. Preliminary data for the resonator and the temperature-frequency characteristic are given.
Frank Möller, Jens Kuhn
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The Journal of the Acoustical Society of America, 2008
Devices and methods for acoustically measuring temperature and pressure are disclosed. A SAW sensor in accordance with an illustrative embodiment can include an electrode structure adapted to transmit and receive surface acoustic waves along a SAW delay line, temperature sensing means for measuring temperature along a first direction of the SAW delay ...
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Devices and methods for acoustically measuring temperature and pressure are disclosed. A SAW sensor in accordance with an illustrative embodiment can include an electrode structure adapted to transmit and receive surface acoustic waves along a SAW delay line, temperature sensing means for measuring temperature along a first direction of the SAW delay ...
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2006 International Conference on Microwaves, Radar & Wireless Communications, 2006
In this paper the microwave humidity sensor has been presented. In the device the surface acoustic waves (SAW) resonator with nafion coating was used. The sensor exhibits good sensitivity and linearity as well as the resistance to active chemical compounds.
Adam Kawalec, Mateusz Pasternak
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In this paper the microwave humidity sensor has been presented. In the device the surface acoustic waves (SAW) resonator with nafion coating was used. The sensor exhibits good sensitivity and linearity as well as the resistance to active chemical compounds.
Adam Kawalec, Mateusz Pasternak
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IEEE NTC,Conference Proceedings Microwave Systems Conference, 2002
The article gives an overview of the capabilities of sensor systems combining the basic principles of SAW identification (ID) tags with the properties of SAW sensors. The concept of SAW telemetry systems created in this way has several advantages compared with other solutions, with the two most important being that the sensors themselves do not require
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The article gives an overview of the capabilities of sensor systems combining the basic principles of SAW identification (ID) tags with the properties of SAW sensors. The concept of SAW telemetry systems created in this way has several advantages compared with other solutions, with the two most important being that the sensors themselves do not require
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High-temperature langasite SAW oxygen sensor
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2011High-temperature langasite SAW oxygen sensors using sputtered ZnO as a resistive gas-sensing layer were fabricated and tested. Sensitivity to oxygen gas was observed between 500°C to 700°C, with a sensitivity peak at about 625°C, consistent with the theoretical predictions of the acoustoelectric effect.
Peng, Zheng +5 more
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Proceedings of LFNM 2005. 7th International Conference on Laser and Fiber-Optical Networks Modeling, 2005., 2005
Surface acoustic wave (SAW) devices can be used as identification and sensor elements (SAW transponders) for measuring physical, chemical and biological quantities such as temperature, pressure, torque, acceleration, humidity, etc. that do not need additional power supply for the sensor elements and may be accessed wirelessly.
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Surface acoustic wave (SAW) devices can be used as identification and sensor elements (SAW transponders) for measuring physical, chemical and biological quantities such as temperature, pressure, torque, acceleration, humidity, etc. that do not need additional power supply for the sensor elements and may be accessed wirelessly.
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Passive wireless UV SAW sensor
Applied Physics A, 2020This paper presents studies of a passive wireless ultraviolet (UV) surface acoustic wave (SAW) sensor operating in the frequency range 436–440 MHz. The sensor contains two SAW delay lines (DLs). The first DL is measuring, and the second is the reference.
G. Ya. Karapetyan +6 more
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Remote sensor system using passive SAW sensors
Proceedings of IEEE Ultrasonics Symposium ULTSYM-94, 1994The aim of this paper is to show the possibilities of combining the basic principles of SAW identification (ID) tags with the well known properties of SAW sensors. The concept of SAW ID-sensors created in this way has several advantages over other solutions with the most two important being that the sensors themselves do not require a separate energy ...
null Buff +7 more
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New capabilities for optimizing SAW gas sensors
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2001It is shown how the performances of SAW gas sensors can be optimized based on pure acoustic peculiarities of SAW propagation in anisotropic single crystals. For a given gas and sensitive membrane, the calibration curve (dependence of the response R versus gas concentration n), the sensitivity S (slope of the calibration curve: S = dR/dn), the detection
VI Anisimkin, E Verona
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A miniaturized SAW-PIRANI sensor
2012 IEEE International Ultrasonics Symposium, 2012SAW Pirani sensors are a promising solution for low pressure monitoring. We present here the first results obtained with a new packaging solution based on CSSP technology. Pressure sensitivity and good response time are demonstrated experimentally. A model is developed to account for the sensor's behavior, including an observed slow drift.
P. Nicolay, O. Elmazria, X. Perois
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