In the past, piezoelectricity transducer was adopted usually in theultrasonic flowmeter development, so in higher temperature, for example, exceeds 150"C, the measurement was not carried out.
以往的超声流量计均采用压电超声换能器进行测量，这样在被测流体温度较高，超过150℃的情况下，就无法进行测量了。
参考来源 - 超声相关流量计的设计The pressure signal was detected with the piezoelectricity type pressure sensor. The pulse signal was produced by close switch.
装置采用压电式压力传感器检测力特征信号,采用接近开关检测脉冲信号。
参考来源 - 锻压机械生产过程在线监控装置的研制·2,447,543篇论文数据，部分数据来源于NoteExpress
以上来源于: WordNet
N the production of electricity or electric polarity by applying a mechanical stress to certain crystals 压电
N the converse effect in which stress is produced in a crystal as a result of an applied potential difference 压电效应
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