公开(公告)号：US5248935A

公开(公告)日：1993-09-28

申请号：US838946

申请日：1992-02-21

申请人： Mitsuhiro Sakoyama ,  Masaharu Takeda ,  Naohide Suzuki

发明人： Mitsuhiro Sakoyama ,  Masaharu Takeda ,  Naohide Suzuki

IPC分类号： G01R21/133 ,  G06G7/02

CPC分类号： G01R21/133 ,  G06G7/02

摘要： An electronic type watthour measuring apparatus equipped with an automatic measuring-error correcting circuit. The electronic type watthour measuring apparatus includes: a power-to-voltage (W/V) converter for converting electrical power supplied from a power source into a voltage signal corresponding to the electrical power; a voltage-to-frequency converter for converting the voltage signal derived from the W/V-converter into a frequency signal corresponding to the voltage signal and indicative of the electrical power with an error; a calculator for calculating a difference between the frequency of the frequency signal and a frequency of a reference signal derived from a reference watthour meter while measuring the same electrical power from the power source; and a controller for controlling the voltage signal outputted from the W/V-converter based on the difference in the frequencies of both the frequency signal and reference signal so as to eliminate the error contained in the electric power measured by the electronic type watthour measuring apparatus.

摘要翻译： 一种配备有自动测量误差校正电路的电子式瓦特测量装置。 所述电子式电度计测量装置包括：电源电压（W / V）转换器，用于将从电源提供的电力转换为对应于电力的电压信号; 电压 - 频率转换器，用于将从所述W / V转换器导出的电压信号转换为与所述电压信号相对应的频率信号并且指示具有误差的电功率; 计算器，用于在测量来自所述电源的相同电力的同时计算所述频率信号的频率与从所述参考电度表得到的参考信号的频率之间的差; 以及控制器，用于基于频率信号和参考信号的频率差来控制从W / V转换器输出的电压信号，以消除由电子式电度计测量装置测量的电力中包含的误差 。