Passive remote sensing for temperature and pressure using SAW resonator devices
Passive remote sensing for temperature and pressure using SAW resonator devices
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DOI：
10.1109/58.726466
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发表时间：
1998-09-01
影响因子：
3.6
通讯作者：
Goroll, M
中科院分区：
文献类型：
--
作者：
Buff, W;Klett, S;Goroll, M
使用基于表面声波（SAW）技术的无源传感器的无线感测对于许多应用是必要的。本文提出了一种利用两个声表面波谐振器（SAWR）的差频输出进行温度和压力测量的新型传感器设计。该传感器由位于同一衬底上的两个声表面波谐振器组成，具有不同的声表面波传播方向，依靠声表面波传播速度的变化来测量环境量，如压力或温度。该方法的目的是抑制询问单元和无源传感器设备之间的RF链路（无线电信道）的干扰影响。在这种情况下，输出信号是频率差，并且在传感器信号的传输期间不依赖于无线电信道的变化。
Wireless sensing using passive sensors based on surface acoustic wave (SAW) technology is necessary for many applications. In this paper a new sensor design that uses the differential frequency output from two SAW resonators (SAWR) for temperature and pressure measurement is presented. The sensor, which consists of two SAWRs on the same substrate with different SAW propagation directions, relies on the variations of the SAW propagation velocity to measure environmental quantities such as pressure or temperature. The aim of this approach is to suppress the disturbing influences of the RF link (radio channel) between the interrogation unit and the passive sensor device. In this case, the output signal is a frequency difference and does not depend on changes in the radio channel during the transmission of the sensor signal.