Two signals from the mass flowmeter are filtered by no change of phase, and the phase difference is given by zeropassage arithmetic.
两路信号数据采集后使用了无相位变化的滤波方法,通过过零点算法计算出得出相位差。
2
Before the design of digital circuit, measurement method of phase difference is discussed. Two-way zeropassage phase detector is chosen as solution finally.