JPS6082253U

JPS6082253U - Electro-hydraulic material testing equipment

Info

Publication number: JPS6082253U
Application number: JP17227483U
Authority: JP
Inventors: 神崎　和夫
Original assignee: 株式会社明石製作所
Priority date: 1983-11-09
Filing date: 1983-11-09
Publication date: 1985-06-07
Also published as: JPS6315804Y2

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図は従来の試験装置のブロック図、第２図はこの考
案の試験装置一実施例を示すブロック図、第３図は第２
図に示す装置の作動状態を示すタイミングチャートであ
る。２・・・サーボ弁、Ｐ・・・試験片、４′・・・加算器
、５・・・発振器、６・・・増幅器、７・・・アクチェ
ータ、８・・・変位検出器、９・・・伸び検出器、１０
・・・荷重検出器、１１〜１３・・・帰還増幅器、１４
′・・・ポジション設定用Ｄ／Ａコンバータ、１５　ａ
〜１５　Ｃ？　　１６ａ〜１６ｃ・・・アナログスイッ
チ、１７ａ〜１７Ｃ・・・試験モード切換スイッチ、１
８．１９・・・データレシーバ、２″０・・・Ａ／Ｄコ
ンバータ、２１・・・スタートスイッチ、２２・・・ス
トップスイッチ、２３・・・キーボードエンコーダ、２
４・・・メモリ、２５・・・ｃｐｕ、　２６・・・コン
ピュータ・バス、２８・・・液圧源駆動回路、２９・・
・液圧源。Fig. 1 is a block diagram of a conventional test device, Fig. 2 is a block diagram showing an embodiment of the test device of this invention, and Fig. 3 is a block diagram of a conventional test device.
3 is a timing chart showing the operating state of the device shown in the figure. 2... Servo valve, P... Test piece, 4'... Adder, 5... Oscillator, 6... Amplifier, 7... Actuator, 8... Displacement detector, 9... ...Elongation detector, 10
... Load detector, 11-13 ... Feedback amplifier, 14
'...D/A converter for position setting, 15a
~15 C? 16a-16c...Analog switch, 17a-17C...Test mode changeover switch, 1
8.19...Data receiver, 2''0...A/D converter, 21...Start switch, 22...Stop switch, 23...Keyboard encoder, 2
4...Memory, 25...CPU, 26...Computer bus, 28...Liquid pressure source drive circuit, 29...
・Hydraulic pressure source.

Claims

[Scope of utility model registration request]

Signals from the oscillator, position setter, and detector corresponding to each test mode are input to the control system of the actuator that applies a load to the test piece via an adder, and the signals are selectively set to the desired test mode state. In an electro-hydraulic material testing device that switches to the mode and electrically detects the mode measurement value, there is a circuit that operates in conjunction with this when the power switch of the device is turned on to switch to displacement mode, and a circuit that switches to displacement mode. A circuit that inputs the detection signal of the displacement detector as a negative feedback signal to the adder when the displacement mode is changed, and a circuit that cancels the detection signal of the displacement detector with the negative feedback signal when the displacement mode is activated (the circuit inputs the detection signal of the displacement detector to the adder as a negative feedback signal). By providing a circuit, when the displacement mode is entered, signals other than the oscillator are prevented from being input to the control system of the actuator, and furthermore, signals other than the oscillator are not input to the control system of the actuator. An electro-hydraulic material testing device characterized by being provided with a hydraulic pressure source drive circuit that operates when the