一种精度可调的速度测量系统的设计与实现

摘要

根据常用的频率采集方法,结合速度矢量信号的特点,提出了将速度矢量信号转换为不同相位的频率信号以实现速度矢量采集的设计思路,通过软硬件结合的方式实现速度采集系统.为提高系统的测试性,设计了自激励测试电路.为了解决速度变化带来的采样精度低问题,设计了采样时钟自动调整机制.经测试,采集结果准确,精度可调,可满足系统要求.%According to the usual frequency acquisition method,combining the characteristics of velocity vector signal,proposed a design idea of velocity vector measurement by the velocity vector signals into fre-quency signals of different phases. Implement velocity measurement system through a combination of soft-ware and hardware . In order to improve the testability of the system,the Self-test circuit is designed. In order to solve the problem of low sampling precision caused by speed changes,designed to automatically adjust the sampling clock mechanism. After testing,the acquisition results are accurate,precision adjusta-ble,meet the system requirements.