JPS6162838A - Load speed controller of material tester - Google Patents
Load speed controller of material testerInfo
- Publication number
- JPS6162838A JPS6162838A JP59185143A JP18514384A JPS6162838A JP S6162838 A JPS6162838 A JP S6162838A JP 59185143 A JP59185143 A JP 59185143A JP 18514384 A JP18514384 A JP 18514384A JP S6162838 A JPS6162838 A JP S6162838A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- load
- frequency
- output
- frequency divider
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は、電動機を駆動源とし、（イオ′１の引張試験
、圧縮試験、および繰り返し疲労試験等を行う材料試験
機の負荷速度制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial application field The present invention is applied to load speed control of a material testing machine that uses an electric motor as a drive source and performs tensile tests, compression tests, repeated fatigue tests, etc. of io'1. Regarding equipment.
（ロ）従来技術
材料試験機の荷重負荷動力源に電動機を用いた場合、そ
の負荷速度の可変範囲は、従来、負荷υ■構に可変減速
装置を有する場合でおよそ１〜１ ／１０００００、可
変減速装置を用いなければおよそ１〜１ ／１０００程
度である。(b) Conventional technology When an electric motor is used as the load-loading power source of a material testing machine, the variable range of the load speed is conventionally variable from approximately 1 to 1/100,000 when the load υ■ structure has a variable speed reduction device. If no deceleration device is used, the speed is about 1 to 1/1000.
ところで、材料の引張、圧縮あるいは繰り返し疲労試験
において、高速から極低速までの広範囲の負荷速度が要
求される場合、可変減速機を用いない従来装置では速度
制御範囲が要求をｌｌ′Ｉ′ｉ足せず、また、可変減速
機を用いるとギア等のハックラッシュが存在する為、試
験に悪影響をＪｊえ、正ｒ＋７１゛な試験結果を得るこ
とができないという欠点があった。By the way, when a wide range of loading speeds from high speed to extremely low speed is required in tensile, compression, or cyclic fatigue testing of materials, the speed control range of conventional equipment that does not use a variable reducer cannot meet the requirements. Furthermore, when a variable speed reducer is used, there is a hacklash of the gears, etc., which has a negative effect on the test and makes it impossible to obtain a positive test result.
（ハ）目的
本発明の目的は、負荷機構に可変減速装面を用いること
なく、高速から極低速までの広範囲の負荷速度制御を行
うことのできる、電動機を負荷駆動源とする材料試験機
の負荷速度制御装置を提供することにある。(c) Purpose The purpose of the present invention is to provide a material testing machine using an electric motor as a load drive source, which can control load speed over a wide range from high speed to extremely low speed without using a variable reduction gear in the load mechanism. An object of the present invention is to provide a load speed control device.
（ニ）構成
本発明の特徴とす名ところは、負荷機構の駆動源に直流
ザーボモークを用いるとともに、負荷目標値信号に負荷
検出値信号をフィードバックしてなる誤差信号の絶対値
に比例した周波数のパルス信号を発生ずる電圧−周波数
変換回路と、その電圧−周波数変換回路の出力を入力と
する可変分周器と、誤差信号の極性を判別する極性判別
回路と、可変分周器出力と極性判別回路出力を入力し、
直流サーボモータを、入力パルス信号の周波数に応した
回転数で極性判別結果に応した方向に回転させるモーフ
駆動回路を備えたことにある。(D) Structure The features and advantages of the present invention are that a DC servo motor is used as the drive source of the load mechanism, and that a frequency proportional to the absolute value of the error signal is generated by feeding back the load detection value signal to the load target value signal. A voltage-frequency conversion circuit that generates a pulse signal, a variable frequency divider that receives the output of the voltage-frequency conversion circuit as an input, a polarity discrimination circuit that discriminates the polarity of an error signal, and a variable frequency divider output and polarity discrimination. Input the circuit output,
The present invention includes a morph drive circuit that rotates the DC servo motor at a rotation speed corresponding to the frequency of the input pulse signal and in a direction corresponding to the polarity determination result.
（ボ）実施例 本発明の実施例を、以下、図面に基づいて説明する。(B) Example Embodiments of the present invention will be described below based on the drawings.
第１図は本発明実施例の構成を示すブロック図で、第２
図は本発明実施例により制御される＋Ａ利試験機の負荷
機構りの構成を示す図である。FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.
The figure is a diagram showing the configuration of a load mechanism of a +A profit tester controlled by an embodiment of the present invention.
第２図において、１は直流サーボモータでその動力は、
ブーＩＪ ２、ヘルド３、プーリ４、ウオーム５、ウオ
ームホイール６、およびねし７を介して試験片Ｗに伝達
され、可変減速機等を用いず殆どバンクラッシュの発生
しない構造となっている。In Figure 2, 1 is a DC servo motor whose power is:
It is transmitted to the test piece W via the boot IJ 2, heald 3, pulley 4, worm 5, worm wheel 6, and screw 7, and has a structure in which a variable reduction gear or the like is not used and almost no bank crash occurs.
なお、８はロー１′セルである。Note that 8 is a row 1' cell.
設定器１０は試験片Ｗに加えるべき荷重の目標値信号を
発生する為のもので、例えば第３図（ａ）。The setting device 10 is for generating a target value signal of the load to be applied to the test piece W, for example, as shown in FIG. 3(a).
（ｂｌに示す如きランプ波や、同図（Ｃ１に示す如き繰
り返し三角波等の電圧信号を出力することができる。It is possible to output a voltage signal such as a ramp wave as shown in (bl) or a repetitive triangular wave as shown in the same figure (C1).
試験片Ｗに作用する荷重は、ロードセル８およびロード
アンプ１１によって検出され、その検出値信号は目標値
信号にフィー１”ハックされている。The load acting on the test piece W is detected by the load cell 8 and the load amplifier 11, and the detected value signal is hacked by a fee of 1'' to the target value signal.
このフィードハックにおいて生ずる誤差信号は、増巾器
１２で増［１１された後、絶対値回路１３によってその
極性にかかわらず常に正の直流電圧信号とされ、■−ｒ
コンバータ１４に入力される。同時に、誤差信号の極性
は極性判別回路１５によって判別される。The error signal generated in this feed hack is amplified by the amplifier 12 and then converted into a positive DC voltage signal by the absolute value circuit 13 regardless of its polarity.
It is input to converter 14. At the same time, the polarity of the error signal is determined by the polarity determining circuit 15.
Ｖ−ｆコンバータ１４は、入力信号の電圧に比例した周
波数のパルス信号を発生するが、この■−ｆコンバータ
は約５０ ＫＩｌｚ〜５１１ｚ （１〜１００００ ）
の範囲の周波数のパルス信号を発生ずることができる。The V-f converter 14 generates a pulse signal with a frequency proportional to the voltage of the input signal.
It is possible to generate pulse signals with frequencies in the range of .
Ｖ−ｆコンバータ１４の出力パルス信号は次段の可変分
周器１６の入力信号となっている。The output pulse signal of the Vf converter 14 serves as an input signal to the next stage variable frequency divider 16.
可変分周器１６は、１〜１／１０まで分周可能なマルチ
プライヤ３個と、１〜１／２まで分周可能なマルチプラ
イヤ１個を、カスケード接続して構成されており、入力
パルス周波数に対して１〜１ ／２０００の範囲で分周
することができる。従って、Ｖ−ｆコンバータ１４およ
び可変分周器１６とにより、誤差信号から最大１〜１
／２０００００００の周波数範囲のパルス信号を発生さ
せることができる。The variable frequency divider 16 is configured by cascading three multipliers that can divide the frequency from 1 to 1/10 and one multiplier that can divide the frequency from 1 to 1/2. The frequency can be divided in the range of 1 to 1/2000. Therefore, by using the V-f converter 14 and the variable frequency divider 16, the error signal can be
It is possible to generate pulse signals in the frequency range of /20000000.
可変分周器１６の出力パルス信号と、前述した極性判別
回路１５の出力信号は、直流サーボモータ１の駆動回路
１７に供給される。駆動回路１７は、極性判別回路１５
の出力信号を正転・逆転指令信号として、入力パルス周
波数に比例した回転数で直流サーボモータ１を回転駆動
さゼることかでき、例えばｆ−Ｖコンバーク１７ａとサ
ーボアンプ１７ｂによって構成することができる。The output pulse signal of the variable frequency divider 16 and the output signal of the polarity determination circuit 15 described above are supplied to the drive circuit 17 of the DC servo motor 1. The drive circuit 17 includes a polarity determination circuit 15
The DC servo motor 1 can be driven to rotate at a rotation speed proportional to the input pulse frequency by using the output signal as a forward/reverse rotation command signal.For example, it can be configured by an f-V converter 17a and a servo amplifier 17b. can.
従って、直流サーボモータ】の回転数は１〜１ ／２０
００００００の範囲に亘って制御可能となり、その直流
サーボモータ１を駆動源とする負荷機構は、１〜Ｉ ／
２０００００００の範囲の負荷速度で制御することがで
きる。Therefore, the rotation speed of the DC servo motor is 1 to 1/20
The load mechanism, which uses the DC servo motor 1 as a drive source, can be controlled over a range of 1 to I/
It can be controlled with a load speed in the range of 20,000,000.
なお、以上の実施例においては、制御量を荷重とした場
合の例を示したが、他の物理量、例えば振巾や伸びを制
御量としても、ロードセル８に替えて振巾検出器や伸び
計を設置することにより、全く同様の速度制御を行い得
ることは勿論である。In addition, in the above embodiment, an example was shown in which the controlled quantity is the load, but other physical quantities, such as swing width or elongation, may also be used as the controlled quantity, by using a swing width detector or an extensometer instead of the load cell 8. Of course, by installing the same speed control, it is possible to perform the same speed control.
（へ）効果
以上説明したように、本発明によれば、目標値信号に検
出値信号をフィードバックしてなる誤差信号の電圧に比
例するパルス信号を発生し、そのパルス信号を可変分周
器によって任意に分周し、その可変分周器の出力パルス
周波数に比例した回転数で負荷機構の駆動源たる直流サ
ーボモータを駆動するよう構成したので、直流サーボモ
ータの可変速範囲を著しく拡大することができ、負荷機
構内に可変減速装置を用いることなく、例えば１〜］
／２０００００００の広範囲に亘る負荷速度制御を達成
することができる。これは、試験片の引張（又圧縮）荷
重速度を、例えば３５０ ｍ／ｍｉｎ〜０．００００２
ｍｍ／ｍｉｎ程度の広範囲に制御し得るとともに、繰り
返し疲労試験の繰り返し周波数ではおよそ２’、５１１
ｚ〜Ｘｌ０−Ｉ？Ｉｌｚの制御を行うことができること
を意味し、材料試験機としての要求を充分に達成し得る
ものである。また、可変減速機等功機械的変速装置を不
要とするから、バックラッシュの影響を受けることなく
、特に、繰り返し疲労試験は常に正確なデータを得るこ
とができ、その効果は大きい。(F) Effects As explained above, according to the present invention, a pulse signal proportional to the voltage of the error signal obtained by feeding back the detected value signal to the target value signal is generated, and the pulse signal is transmitted by the variable frequency divider. Since the frequency is arbitrarily divided and the DC servo motor, which is the drive source of the load mechanism, is driven at a rotation speed proportional to the output pulse frequency of the variable frequency divider, the variable speed range of the DC servo motor can be significantly expanded. For example, 1~] without using a variable speed reduction device in the load mechanism.
/20,000,000 can be achieved over a wide range of load speed control. This allows the tensile (or compressive) loading rate of the specimen to be varied, for example from 350 m/min to 0.00002 m/min.
It can be controlled over a wide range of about mm/min, and the repetition frequency of the cyclic fatigue test is approximately 2', 511
z~Xl0-I? This means that Ilz can be controlled, and the requirements for a material testing machine can be fully achieved. In addition, since a mechanical transmission device such as a variable speed reducer is not required, accurate data can always be obtained especially in repeated fatigue tests without being affected by backlash, which is highly effective.
第１図は本発明実施例の構成を示すブロック図、第２図
は本発明実施例により制御される材料試験機の負荷機構
の構成を示す図である。第３図（ａ）。
（ｂｌ、ｆｃｌはそれぞれ設定器１０の出力波形の例を
示ずグラフである。
１−直流サーボモータ、５〜ウオーム
６−ウオームホイール、７−ボールネジ８−ロードセル
、 １０−設定器１３−絶対値回路、 １４−
Ｖ −ｆコンバータ１５−極性判別回路、 １６−可変
分周器１７−駆動回路、 ｌ ７ ａ−−ｆ −
Ｖ ’：Ｊンハータ１７ ｂ−サーボアンプFIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a diagram showing the configuration of a loading mechanism of a material testing machine controlled by the embodiment of the present invention. Figure 3(a). (bl and fcl are graphs that do not show examples of the output waveforms of the setting device 10, respectively. 1 - DC servo motor, 5 - worm 6 - worm wheel, 7 - ball screw 8 - load cell, 10 - setting device 13 - absolute value circuit, 14-
V-f converter 15 - polarity discrimination circuit, 16 - variable frequency divider 17 - drive circuit, l 7 a--f -
V': J-Harta 17 b-servo amplifier
Claims (1)
験体に加えるべき物理量の目標値信号に、被試験体に作
用する上記物理量の検出値信号をフィードバックするこ
とにより、上記負荷機構の駆動制御を行う材料試験機に
おける制御装置であって、上記目標値信号に上記検出値
信号をフィードバックしてなる誤差信号の絶対値に比例
した周波数のパルス信号を発生する電圧−周波数変換回
路と、その電圧−周波数変換回路の出力を入力とする可
変分周器と、上記誤差信号の極性を判別する極性判別回
路と、上記可変分周器出力と上記極性判別回路出力を入
力し、上記直流サーボモータを、入力パルス信号の周波
数に応じた回転数で上記極性の判別結果に応じた方向に
回転させるモータ駆動回路とを備えたことを特徴とする
材料試験機の負荷速度制御装置。It has a load mechanism using a DC servo motor as a drive source, and drives the load mechanism by feeding back a detected value signal of the physical quantity acting on the test object to a target value signal of the physical quantity to be applied to the test object. A control device for a material testing machine that performs control, the voltage-frequency conversion circuit generating a pulse signal with a frequency proportional to the absolute value of an error signal obtained by feeding back the detected value signal to the target value signal; A variable frequency divider that receives the output of the voltage-frequency conversion circuit as an input, a polarity discrimination circuit that discriminates the polarity of the error signal, and a variable frequency divider that inputs the output of the variable frequency divider and the output of the polarity discrimination circuit, and the DC servo motor. A load speed control device for a material testing machine, comprising: a motor drive circuit that rotates the motor at a rotation speed corresponding to the frequency of an input pulse signal in a direction according to the polarity determination result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59185143A JPS6162838A (en) | 1984-09-03 | 1984-09-03 | Load speed controller of material tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59185143A JPS6162838A (en) | 1984-09-03 | 1984-09-03 | Load speed controller of material tester |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6162838A true JPS6162838A (en) | 1986-03-31 |
| JPH0562289B2 JPH0562289B2 (en) | 1993-09-08 |
Family
ID=16165620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59185143A Granted JPS6162838A (en) | 1984-09-03 | 1984-09-03 | Load speed controller of material tester |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6162838A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6425888U (en) * | 1987-07-30 | 1989-02-14 | ||
| JPH01118741A (en) * | 1987-10-30 | 1989-05-11 | Shimadzu Corp | Material testing machine |
| JP2003215005A (en) * | 2002-01-22 | 2003-07-30 | Hokkaido Technology Licence Office Co Ltd | Material testing machine |
-
1984
- 1984-09-03 JP JP59185143A patent/JPS6162838A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6425888U (en) * | 1987-07-30 | 1989-02-14 | ||
| JPH01118741A (en) * | 1987-10-30 | 1989-05-11 | Shimadzu Corp | Material testing machine |
| JP2003215005A (en) * | 2002-01-22 | 2003-07-30 | Hokkaido Technology Licence Office Co Ltd | Material testing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0562289B2 (en) | 1993-09-08 |
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