The surfaceacousticwave (SAW) sensor can transform the measured object into frequency output, viz a kind of digital signal output.
声表面波(SAW)传感器能将被测量转换成容易检测的频率信号,即一种准数字信号的输出。
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Because its driving signal is surfaceacousticwave, thus it overcomes the shortcomings of complex structure, difficult fabrication and miniaturization in normal ultrasonic motor.