| 无线无源声表面波气压传感器 |
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| 引用本文： | 江城,杨军锋,王学德.无线无源声表面波气压传感器[J].传感器与微系统,2005,24(6):79-81,84. |
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| 作者姓名： | 江城 杨军锋 王学德 |
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| 作者单位： | 空军工程大学,工程学院,陕西,西安,710038 |
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| 摘 要： | 阐述了声表面波气压传感器的设计原理、结构及相应的遥测系统和数据采样处理系统。应用正交相位检测法,将几纳秒的时间差测量转化成较大的相位测量。采用回波幅值触发采样,有效提高采样及数据处理效率。设计的SAW气压传感器理论灵敏度可达0.7kPa,测量范围在为10～350kPa。
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| 关 键 词： | 无线无源 声表面波 气压传感器 遥测系统 |
| 文章编号： | 1000-9787(2005)06-0079-03 |
Wireless passive air pressure sensor based on SAW |
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| Jiang Cheng,YANG Jun-feng,WANG Xue-de.Wireless passive air pressure sensor based on SAW[J].Transducer and Microsystem Technology,2005,24(6):79-81,84. |
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| Authors: | Jiang Cheng YANG Jun-feng WANG Xue-de |
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| Abstract: | Design principle structure,remote-measuring system and sampling-processing system of the sensor are discussed.In order to improve the sensitivity of the wireless sensor,the method of quadrature coherent detection is used to process the signals of the reflected wave.The detection of several ns time-errors can be changed to the detection of phase.For data reduction,an asynchronous sampling is applied utilizing individually triggered sample/hold circuits.The theoretical sensitivity of SAW air sensor can reach 0.7kPa,and the measuring range is 10～ 350kPa. |
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| Keywords: | wireless passive SAW(surface acoustic wave) air pressure sensors remote-measuring system |
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