SAW resonators for temperature control of high-voltage equipment

IF 4.1 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical Pub Date : 2025-05-08 DOI:10.1016/j.sna.2025.116679

G. Ya. Karapetyan , V.E. Kaydashev , V.A. Kalinin

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Abstract

We study a new wireless system consisting of a temperature sensor and a reader designed for simultaneous remote monitoring of several nearby positioned passive temperature sensors for three phase high voltage equipment. The proposed temperature sensor based on two SAW resonators with slightly different frequencies and the method to monitor a temperature induced shift of the frequency difference between two anti-resonances allows one to enhance accuracy of the temperature measurements. The use of a sensor with two anti-resonances results in reduced reflections of RF signal outside the anti-resonance frequency bands eliminating a parasite electromagnetic influence of the neighboring sensors to each other. A special reader circuit has been proposed which allows obtain sufficiently sharp peaks at the anti-resonant frequencies of the SAW resonators. Inexpensive alternative to the voltage-controlled generators is used for reader design as only the frequency difference of anti-resonances is enough to be measured by cheaper means instead of probing both frequencies separately. A sensor remote monitoring range of 4 m has been achieved to simultaneously monitor the temperature of three nearby positioned sensors. It has been experimentally shown that the temperature coefficient of the anti-resonance frequency difference (TCFD) for the studied double resonance sensor is −401.7 ppm/°C which is ∼20 times greater than the temperature coefficient of the each resonance frequency (TCF).

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用于高压设备温度控制的SAW谐振器

本文研究了一种由温度传感器和读取器组成的新型无线系统，用于同时远程监测三相高压设备附近的几个无源温度传感器。所提出的温度传感器基于两个频率略有不同的声表面波谐振器和监测两个反谐振器之间的频率差的温度引起的位移的方法，可以提高温度测量的精度。具有两个反共振的传感器的使用减少了反共振频带外射频信号的反射，消除了相邻传感器相互之间的寄生电磁影响。提出了一种特殊的读取电路，可以在声表面波谐振器的抗谐振频率处获得足够尖锐的峰值。电压控制发电机的廉价替代品用于阅读器设计，因为只有反谐振的频率差足以通过更便宜的手段来测量，而不是分别探测两个频率。实现了4 m的传感器远程监测距离，同时监测附近3个定位传感器的温度。实验表明，所研究的双谐振传感器的抗谐振频差温度系数（TCFD）为−401.7 ppm/°C，是各谐振频率温度系数（TCF）的约20倍。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Sensors and Actuators A-physical 工程技术-工程：电子与电气

CiteScore

8.10

自引率

6.50%

发文量

630

审稿时长

49 days

期刊介绍： Sensors and Actuators A: Physical brings together multidisciplinary interests in one journal entirely devoted to disseminating information on all aspects of research and development of solid-state devices for transducing physical signals. Sensors and Actuators A: Physical regularly publishes original papers, letters to the Editors and from time to time invited review articles within the following device areas: • Fundamentals and Physics, such as: classification of effects, physical effects, measurement theory, modelling of sensors, measurement standards, measurement errors, units and constants, time and frequency measurement. Modeling papers should bring new modeling techniques to the field and be supported by experimental results. • Materials and their Processing, such as: piezoelectric materials, polymers, metal oxides, III-V and II-VI semiconductors, thick and thin films, optical glass fibres, amorphous, polycrystalline and monocrystalline silicon. • Optoelectronic sensors, such as: photovoltaic diodes, photoconductors, photodiodes, phototransistors, positron-sensitive photodetectors, optoisolators, photodiode arrays, charge-coupled devices, light-emitting diodes, injection lasers and liquid-crystal displays. • Mechanical sensors, such as: metallic, thin-film and semiconductor strain gauges, diffused silicon pressure sensors, silicon accelerometers, solid-state displacement transducers, piezo junction devices, piezoelectric field-effect transducers (PiFETs), tunnel-diode strain sensors, surface acoustic wave devices, silicon micromechanical switches, solid-state flow meters and electronic flow controllers. Etc...