本文叙述了一种测量音频或倔于音频范围内的周期性电信号的相位测量仪器。测量误差在信号幅度的一定范围内与之无关,而对于实际中常遇到的信号,误差可小于0.1°。这种仪器操作简单,只需要调节计数器的灵敏度。相位测量结果在计数器上读数。文章还介绍了使测量结果与测试信号中所含有偶次谐波无关的方法。 This article describes a phase measurement instrument that measures audio or periodic electrical signals that are dead in the audio range. The measurement error has nothing to do with a certain range of signal amplitude, but the error can be less than 0.1 ° for the signal often encountered in practice. This kind of instrument is simple to operate, only needs to adjust the counter’s sensitivity. The phase measurement is read on the counter. The article also describes ways to make the measurement independent of the even harmonics contained in the test signal.