| 无线无源测温原理 |
| 添加时间：2017/8/16 17:13:14 浏览次数： |
| 1.无线采集器通过天线发射无线射频信号作为传感器激励信号。 1. The wireless terminal transmission radio frequency signal as the sensor by antenna excitation signal. 2.传感器天线接收该无线射频信号，通过叉指换能器的逆压电效应在基片表面激活一个声表面波。声表面波沿基片传播，被左右两个周期性反射栅反射形成谐振。该谐振器的谐振频率与基片的温度有关。叉指换能器通过压电效应将声表面波转变成应答的无线射频信号输出。 2. Sensor antennas for the wireless radio frequency signal, through the fork refers to the inverse piezoelectric effect of transducer in the substrate surface activation of a surface acoustic wave. Surface acoustic wave propagation along the substrate, by about two periodic resonance reflection grating formation. The resonant frequency of the resonator is associated with the temperature of the substrate. Fork refers to the surface acoustic wave transducer with piezoelectric effect into response of radio frequency signal output. 3.返回的无线射频信号被采集器天线接收，通过测量无线射频信号的频率变化即可得到温度值。 3. To return to the wireless radio frequency signals are collector antenna, by measuring the frequency of the radio frequency signal changes can get temperature value. |
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