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本文就 V/F 变换方式在交流采样中的特点进行了分析,对这种模数转换方式由于积分效应引起的转换误差提出了确定统一时滞的校正方法。本文也对 V/F 变换方式的采样频率与精度(字长)的矛盾提出了一种有效的解决方案,并应用在数据采集系统中。
In this paper, the characteristics of V / F conversion in AC sampling are analyzed. A correction method to determine the uniform delay is proposed for the conversion error caused by the integration effect. This article also proposed an effective solution to the contradiction between the sampling frequency and the accuracy (word length) of the V / F conversion method and applies it in the data acquisition system.