中文摘要：

为了实现对微弱振动的频率检测,提出一种基于变幅放大的机械振动测量方案,并设计了机械振动精密测量仪。测量时由变幅放大装置将微弱振动的幅值放大,然后经压电敏感元件转换为电信号,并通过高速A/D转换器和FPGA硬件电路完成对信号的采样过程,再利用软件插补细分算法实现0.061ns级的时间测量,从而实现高精度的频率测量。

英文摘要：

In order to detect the frequency of weak vibration, a method to measure the mechanical vibration is proposed with amplitude amplification, while a mechanical vibration precision measuring instrument is designed on the basis of it. When measured by the amplitude amplifying method, it means to amplify weak vibration amplitude and change it into an electrical signal by a piezoelectric sensing element, and then the signal is sampling by high speed A/D converter and FPGA hardware circuit, and time measurement can reach 0.061ns level under software interpolation subdivision algorithm, so as to realize high-precision frequency measurement.