Results 201 to 210 of about 121,086 (257)
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Proceedings of IEEE 48th Annual Symposium on Frequency Control, 2002
This paper presents experimental data on the performance of some types of SAW sensors like, biosensor, gas sensor and pressure sensors. It is shown that such parameter, as sensitivity is determined by kind of piezocrystal cut and direction of SAW propagation as well as by the construction of sensor, method of treatment of signal, properties of covering
I.B. Yakovkin +3 more
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This paper presents experimental data on the performance of some types of SAW sensors like, biosensor, gas sensor and pressure sensors. It is shown that such parameter, as sensitivity is determined by kind of piezocrystal cut and direction of SAW propagation as well as by the construction of sensor, method of treatment of signal, properties of covering
I.B. Yakovkin +3 more
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Wireless Interrogation of Implantable SAW Sensors
IEEE Transactions on Biomedical Engineering, 2020Implantable sensors provide long-term, accurate physiological measurements after a minimally invasive procedure, particularly when designed as transponders. Wireless interrogation of deeply implanted transponders with RF remains a challenge due to the high loss at the skin-air interface and large tissue RF absorption.
Longfang Zou +2 more
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Precision SAW pressure sensors
1993 IEEE International Frequency Control Symposium, 2002The design and performance of two types of SAW (surface acoustic wave) pressure sensors are considered. SAW resonator oscillators with metal strip gratings designed for operation at 200 and 360 MHz have been used in both types of devices. The sensitivity and the nonlinearity of both sensors, a sensor with a sensitive element shaped as an integral ...
Yu.N. Vlassov +3 more
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Technical Physics, 2002
A new principle of designing a SAW gas sensor is described. This sensor, being essentially of sorption type, also offers properties of thermometric SAW sensors. The basic idea here is that heat fluxes propagate between the SAW substrate and the working surface of the temperature-regulating system with some delay.
R. G. Kryshtal +3 more
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A new principle of designing a SAW gas sensor is described. This sensor, being essentially of sorption type, also offers properties of thermometric SAW sensors. The basic idea here is that heat fluxes propagate between the SAW substrate and the working surface of the temperature-regulating system with some delay.
R. G. Kryshtal +3 more
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2009 IEEE International Ultrasonics Symposium, 2009
This paper presents results for a 250MHZ orthogonal frequency coded (OFC) surface acoustic wave (SAW) cantilever device on YZ LiNbO 3 . A 1-D model is presented which predicts the variation in the wave velocity with applied strain. A FEM analysis is conducted which verifies the strain on the cantilever and supports the 1-D model predictions.
Roller, M. +2 more
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This paper presents results for a 250MHZ orthogonal frequency coded (OFC) surface acoustic wave (SAW) cantilever device on YZ LiNbO 3 . A 1-D model is presented which predicts the variation in the wave velocity with applied strain. A FEM analysis is conducted which verifies the strain on the cantilever and supports the 1-D model predictions.
Roller, M. +2 more
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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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