JPS58169571U

JPS58169571U - resistance measuring device

Info

Publication number: JPS58169571U
Application number: JP6615282U
Authority: JP
Inventors: 宇野沢　昇
Original assignee: 横河電機株式会社
Priority date: 1982-05-07
Filing date: 1982-05-07
Publication date: 1983-11-12

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は本考案装置の一実施例を示す電気的接、読図、
第２図は第１図装置に用いられるアナログ・ディジタル
変換器の出力波形図である。ＣＬ・・・閉回路、Ｒｘ・・・被測定抵抗、ＰＴ・・・
クリップ式変圧器、ＣＴ・・・クリップ式変流器、１３
・・・注入コイル、１４・・・電圧検出コイル、２３・
・・電流検出コイル、Ｏ８Ｃ・・・発振回路、ＢＰＡ・
・・電力増幅器、ＦＬ・・・フィルタ、ＡＭ・・・増幅
器、ＳＥ・・・同期整流回路、ＡＤ・・・アナログ・デ
ィジタル変換器、ＤＩＳ・・・表示回路。FIG. 1 shows an embodiment of the device of the present invention, including electrical connection, diagram reading,
FIG. 2 is an output waveform diagram of the analog-to-digital converter used in the apparatus shown in FIG. CL...Closed circuit, Rx...Resistance to be measured, PT...
Clip type transformer, CT...Clip type current transformer, 13
... Injection coil, 14... Voltage detection coil, 23.
・Current detection coil, O8C ・Oscillation circuit, BPA・
...power amplifier, FL...filter, AM...amplifier, SE...synchronous rectifier circuit, AD...analog-digital converter, DIS...display circuit.

Claims

[Scope of utility model registration request]

A clip-type current transformer having an injection coil and a voltage detection coil, a clip-type current transformer having a coil for detecting a current flowing through a resistance to be measured based on the voltage injected by the injection coil, and a voltage of the transformer having an integrator. After the output of the detection coil is integrated by the integrator for a certain period of time, the output of the current transformer is integrated with a polarity opposite to that of the output of the voltage detection coil, and the output of the current transformer is integrated, and the integrator output becomes zero from the beginning. 1. A resistance measuring device comprising: an analog-to-digital converter for counting clock pulses that cross the clock pulse; and a display circuit for displaying the output of the analog-to-digital converter.