JPS60134144U

JPS60134144U - Electro-hydraulic material testing equipment

Info

Publication number: JPS60134144U
Application number: JP2165684U
Authority: JP
Inventors: 神崎　和夫
Original assignee: 株式会社ミツトヨ
Priority date: 1984-02-20
Filing date: 1984-02-20
Publication date: 1985-09-06

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図は従来の電気液圧式材料試験装置の制御系を示す
ブロック図、第２図ａｔ　ｂｖ　ｃｔ　ｄは測定値の変
化を示すグラフ図、第３図は本考案の実施例に係る電気
液圧式材料試験装置の制御系を示すブロック図、第４図
は第３図に示す電気液圧式材料試験装置の制御系に用い
られる増幅器利得制御装置を示すブロック図である。１・・・発振器、２・・・ポジション設定器、３，４゜
５・・・検出器、６・・・加算器、７・・・アクチュエ
ータ、８・・・サーボ弁、９・・・増幅器、１０・・・
試験モード切換スイッチ、１１，１２，１３・・・帰還
増幅器、１５・・・増幅器利得制御装置、１６，１８・
・・全波整流回路、１７・・・ピークホールド回路、１
９．２１・・・比較器、２０・・・加算器、２２・・・
カウンタ。Fig. 1 is a block diagram showing the control system of a conventional electrohydraulic material testing device, Fig. 2 is a graph showing changes in measured values, and Fig. 3 is a block diagram showing the control system of a conventional electrohydraulic material testing device. FIG. 4 is a block diagram showing a control system of the electrohydraulic material testing apparatus shown in FIG. 3. FIG. 4 is a block diagram showing an amplifier gain control device used in the control system of the electrohydraulic material testing apparatus shown in FIG. 1... Oscillator, 2... Position setter, 3,4゜5... Detector, 6... Adder, 7... Actuator, 8... Servo valve, 9... Amplifier , 10...
Test mode selection switch, 11, 12, 13... Feedback amplifier, 15... Amplifier gain control device, 16, 18...
...Full wave rectifier circuit, 17...Peak hold circuit, 1
9.21... Comparator, 20... Adder, 22...
counter.

Claims

[Scope of utility model registration request]

An electro-hydraulic material testing device that adds the signals of the oscillator, position setter, and detector using an adder and inputs the result to the control system of the hydraulic actuator via the amplifier, while electrically detecting the measured value of the detector. , the amplifier includes a first comparator that compares the signal from the detector with a reference signal and generates a signal each time the value of one signal becomes larger than the value of the other signal; an adder that adds the signals of the comparator, and compares the added value with a predetermined value and increases the gain of the amplifier when the added value is smaller than the predetermined value; The electro-hydraulic material is connected to an amplifier gain control device comprising a second comparator that issues a signal to reduce the value of the amplifier when the added value is larger than a predetermined value. Test equipment.