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引言现代不少技术领域对低频或超低频相位测量提出了较高的测量准确度。多种类型的相位计,特别是数量最大的过零检波法(它包含时间比值法和平均电压法)所用的数字相位计,都具有百分之几到十分之几度的准确度。但是不适当的测量将引入各种附加误差,因而破坏了相位计用于测量时可以达到的准确度。本文分类评述低频相位测量和相位计校准时的误差源,并论述了防止和消除这些误差的原则和方法。误差分类
INTRODUCTION Many modern technologies have proposed higher measurement accuracy for low frequency or ultra-low frequency phase measurements. Many types of phase meters, especially the largest number of zero-crossing detection methods (which include the time ratio method and the average voltage method) used in digital phase meter, have a few tenths of a tenths of a degree of accuracy. However, inadequate measurement introduces various additional errors, thus undermining the accuracy that the phase meter can be used to measure. This article reviews the source of errors in low-frequency phase measurement and phase calibration, and discusses the principles and methods to prevent and eliminate these errors. Error classification