JPS6049470U

JPS6049470U - digital multimeter

Info

Publication number: JPS6049470U
Application number: JP14127983U
Authority: JP
Inventors: 仁志武田; 敦之戸田; 八木　操一; 清和田
Original assignee: 株式会社小糸製作所
Priority date: 1983-09-12
Filing date: 1983-09-12
Publication date: 1985-04-06

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 drawings]

第１図は本考案の一実施例によるデジタルマルチメータ
の概略ブロック図、第２図は第１図の積分回路およびピ
ーク値検出器の具体例を示す回路構成図、第３図および
第４図は第２図のピーク値検出器のオペアンプにオフセ
ット調整機構を付加した例をそれぞれ示す回路構成図、
第５図ａおよびｂは第１図の発電機から直流出力端子を
経てバッテリに供給される全波整流波の電圧およびひず
み波型流の波形図である。　　　　パ１０・・・電流検出用抵抗、１１・・・積分回路、１２
・・・ピーク値検出器、１３・・・Ａ−Ｄ変換器、１４
・・・マイクロプロセッサ、１５・・・デジタル表示器
。FIG. 1 is a schematic block diagram of a digital multimeter according to an embodiment of the present invention, FIG. 2 is a circuit configuration diagram showing a specific example of the integrating circuit and peak value detector of FIG. 1, and FIGS. 3 and 4. are circuit configuration diagrams showing an example in which an offset adjustment mechanism is added to the operational amplifier of the peak value detector shown in Fig. 2, respectively.
5a and 5b are waveform diagrams of the full-wave rectified wave voltage and distorted waveform current supplied from the generator of FIG. 1 to the battery via the DC output terminal. Para 10...Resistor for current detection, 11...Integrator circuit, 12
...Peak value detector, 13...A-D converter, 14
...Microprocessor, 15...Digital display.

Claims

[Scope of utility model registration request]

Equipped with a detector that detects a signal with a waveform similar to a distorted wave, an integrating circuit that integrates the signal waveform detected by the detector, and a peak value detector that detects the peak value of the integrated output from the integrating circuit. , by appropriately selecting an integration constant of the integrating circuit according to the waveform distortion of the distorted wave, the effective value can be calculated and measured from the peak value detected by the peak value detector. A digital multimeter.