JPH0128332B2 - - Google Patents
Info
- Publication number
- JPH0128332B2 JPH0128332B2 JP55145617A JP14561780A JPH0128332B2 JP H0128332 B2 JPH0128332 B2 JP H0128332B2 JP 55145617 A JP55145617 A JP 55145617A JP 14561780 A JP14561780 A JP 14561780A JP H0128332 B2 JPH0128332 B2 JP H0128332B2
- Authority
- JP
- Japan
- Prior art keywords
- load cell
- acceleration
- piezo
- vibration
- dynamic
- 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.)
- Expired
Links
- 230000001133 acceleration Effects 0.000 claims description 34
- 238000012360 testing method Methods 0.000 claims description 6
- 230000003252 repetitive effect Effects 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic means
- G01N2203/0051—Piezoelectric means
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)
- Vibration Prevention Devices (AREA)
Description
【発明の詳細な説明】
本発明は、防振ゴムのバネ定数、ダンピング係
数を測定するための防振ゴムの動的特性測定装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dynamic characteristic measuring device for vibration isolating rubber for measuring the spring constant and damping coefficient of vibration isolating rubber.
一般に、上記ダンピング係数Ｃ、バネ定数Ｋ
は、防振ゴムに加振機により繰返し動的荷重Ｆを
加えたときのこの動的荷重Ｆに基く防振ゴムの変
位X〓、変位速度Ｘ及び加速度X〓により、次の運動
方程式から求められる。Ｍは防振ゴムの質量であ
る。 Generally, the above damping coefficient C, spring constant K
is obtained from the following equation of motion using the displacement X〓, displacement speed X, and acceleration It will be done. M is the mass of the vibration-proof rubber.
Ｆ＝MX¨＋CX＋KX〓
このために、防振ゴムの動的特性を測定するた
めの装置は、防振ゴムの動的荷重を計測する荷重
センサーと、防振ゴムのたわみを計測するセンサ
ーとを最低備える必要があるが、従来は、荷重セ
ンサーとして、固定の基礎と加振機との間に被験
体としての防振ゴムと共に加振軸方向に直列に配
置されたピエゾロードセルを使用しているのに対
し、後者のセンサーとしては、直線電圧差動トラ
ンス、速度検出器、加速度検出器などを使用して
いた。このように、両センサーに種類の異なるも
のを使用すると、両センサーの位相特性を合せる
ことが難しくなり、防振ゴムの動的特性を高精度
で測定する上での大きな障害となつていた。 F=MX¨+CX+KX〓 For this reason, the device for measuring the dynamic characteristics of the anti-vibration rubber includes a load sensor that measures the dynamic load on the anti-vibration rubber and a sensor that measures the deflection of the anti-vibration rubber. Conventionally, a piezo load cell is used as a load sensor, which is placed in series in the vibration axis direction with vibration isolating rubber as a test object between a fixed foundation and a vibration exciter. In contrast, the latter sensors used linear voltage differential transformers, speed detectors, acceleration detectors, etc. In this way, when different types of sensors are used, it becomes difficult to match the phase characteristics of both sensors, which becomes a major obstacle in measuring the dynamic characteristics of anti-vibration rubber with high precision.
また、上記差動トランスでは、復調回路やロー
パスフイルタを必要とするため、位相遅れや高域
での周波数特性に難がある。速度検出器は比較的
優れているが、加振機の全ストロークに亘つて計
測可能にするにはそれ丈長いものが必要で、しか
も高周波低振幅加振時のコア棒の横ブレの影響を
回避するのが難しい。上記加速度検出器には、ゲ
ージ型と圧電型とがあるが、ゲージ型は高域に難
があり、圧電型は大きな放電時定数のものがない
ため低域特性に難がある。 Further, since the differential transformer requires a demodulation circuit and a low-pass filter, it has problems with phase lag and frequency characteristics in high frequencies. Speed detectors are relatively good, but they need to be long to be able to measure the entire stroke of the exciter, and they also need to be long enough to avoid the effects of lateral wobbling of the core rod during high-frequency, low-amplitude excitation. Difficult to avoid. The above-mentioned acceleration detectors include a gauge type and a piezoelectric type, but the gauge type has difficulty in high frequency characteristics, and the piezoelectric type has difficulty in low frequency characteristics because it does not have a large discharge time constant.
このため、上述のようなセンサーを使用した従
来の装置では、防振ゴムの動的特性を高精度で測
定するのに必要とされる、例えば１Hzの低周波数
から例えば1KHzの高周波数までの理想的な周波
数特性を位相特性と一諸に得ることは不可能であ
つた。 For this reason, conventional devices using the above-mentioned sensors cannot achieve the ideal frequency range from a low frequency of, for example, 1 Hz to a high frequency of, for example, 1 KHz, which is required to measure the dynamic characteristics of anti-vibration rubber with high precision. It has been impossible to obtain both the typical frequency characteristics and the phase characteristics at the same time.
本発明は上述した点に鑑みてなされたもので、
その目的とするところは、低周波数から高周波数
まで理想的な周波数特性と位相特性とを有し、防
振ゴムの動的特性の高精度の測定を可能にする防
振ゴムの動的特性測定装置を提供することにあ
る。 The present invention has been made in view of the above points, and
The purpose of this is to measure the dynamic characteristics of anti-vibration rubber, which has ideal frequency and phase characteristics from low frequencies to high frequencies, and enables highly accurate measurement of the dynamic characteristics of anti-vibration rubber. The goal is to provide equipment.
この目的を達成するためになされた本発明によ
る防振ゴムの動的特性測定装置は、基礎と繰返し
荷重を発生する加振機の可動部との間に被験体と
しての防振ゴムと直列に配列した第１のピエゾロ
ードセルと前記可動部に取付けた前記第１のピエ
ゾロードセルと同種の第２のピエゾロードセル及
び該第２のピエゾロードセルに取付けたデツドマ
スからなり、前記第２のピエゾロードセルが発生
する動的荷重信号及び前記デツドマスの質量とに
より求められる加速度信号を発生する加速度セン
サーとを備え、前記第１のピエゾロードセルが発
生する動的荷重信号と前記加速度センサーが発生
する加速度信号とに基き防振ゴムの動的特性を測
定するようになされている。ピエゾロードセルは
一般に、2000秒程度の大きな放電時定数を有する
ものが容易に得られ、デツドマスの重量を変更す
ることによつて高域も5KHz程度まで充分適用で
きるため、低周波数から高周波数まで理想的な周
波数特性が得られ、しかも第１のピエゾロードセ
ルと同種の第２のピエゾロードセルにデツドマス
を取付けて構成した加速度センサーにより得られ
る加速度信号と第１のロードセルにより得られる
荷重信号との間の位相関係を容易に合せることが
できるため、理想的な位相特性も得られ、このこ
とにより、防振ゴムの動的特性を高精度に測定す
ることができるようになる。 In order to achieve this objective, the vibration isolating rubber dynamic characteristic measuring device according to the present invention is designed to connect the vibration isolating rubber as a test object in series between the foundation and the movable part of the vibrator that generates repeated loads. The second piezo load cell is composed of an array of first piezo load cells, a second piezo load cell of the same type as the first piezo load cell attached to the movable part, and a dead mass attached to the second piezo load cell, and the second piezo load cell generates electricity. and an acceleration sensor that generates an acceleration signal determined from a dynamic load signal generated by the first piezo load cell and the mass of the dead mass, the acceleration signal being generated based on the dynamic load signal generated by the first piezo load cell and the acceleration signal generated by the acceleration sensor. It is designed to measure the dynamic characteristics of anti-vibration rubber. In general, piezo load cells can be easily obtained with a large discharge time constant of about 2000 seconds, and by changing the weight of the dead mass, they can be applied to high frequencies up to about 5KHz, making them ideal from low to high frequencies. A frequency characteristic is obtained, and the difference between the acceleration signal obtained by an acceleration sensor configured by attaching a dead mass to a second piezo load cell of the same type as the first piezo load cell and the load signal obtained by the first load cell is obtained. Since the phase relationship can be easily matched, ideal phase characteristics can also be obtained, thereby making it possible to measure the dynamic characteristics of the anti-vibration rubber with high precision.
本発明の好ましい実施例では、加速度センサー
を可動部について対称な位置に複数配列し、これ
らの信号を相加平均して加速度信号を得るように
している。このため、被験体のアンバランスなど
によつて特に高域で加振機の可動部が横ブレして
も、相加平均して得た加速度信号は、各々のセン
サーの計測誤差が相殺された正確なものとなる。 In a preferred embodiment of the present invention, a plurality of acceleration sensors are arranged at symmetrical positions with respect to the movable part, and these signals are arithmetic averaged to obtain an acceleration signal. Therefore, even if the movable part of the vibrator shakes horizontally, especially in the high range, due to unbalance of the subject, the measurement errors of each sensor are canceled out in the arithmetic averaged acceleration signal. It will be accurate.
以下、本発明の実施例を図面について説明す
る。 Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明による装置を一部破断して示
し、図中１は基礎Ｂに固定された第１のピエゾロ
ードセル、２は第１のピエゾロードセル１と同じ
ように基礎Ｂに対して固定して設置された加振
機、３は第１のピエゾロードセル１と同種の第２
のピエゾロードセルで、加振機２の可動部２ａの
一端に固着して取付けられると共にこの第２のピ
エゾロードセル３に固着して取付けられたデツド
マス４と共に加速度センサーを構成している。５
は被験体としての防振ゴムで、加振機２の可動部
２ａの他端の取付テーブル６と第１のピエゾロー
ドセル１とにチヤツク６ａ及び１ａをそれぞれ介
して取付けられている。 FIG. 1 shows a partially cutaway view of the device according to the present invention, in which 1 is a first piezo load cell fixed to a foundation B, and 2 is a first piezo load cell fixed to the foundation B in the same way as the first piezo load cell 1. 3 is a second piezo load cell of the same type as the first piezo load cell 1.
This piezo load cell is fixedly attached to one end of the movable part 2a of the vibrator 2, and together with a dead mass 4 fixedly attached to this second piezo load cell 3, constitutes an acceleration sensor. 5
is a vibration isolating rubber as a test object, which is attached to the mounting table 6 at the other end of the movable part 2a of the vibration exciter 2 and the first piezo load cell 1 via chucks 6a and 1a, respectively.
上述の構成にて、加振機２が防振ゴム５に繰返
し動的荷重を加えたとき、第１のピエゾロードセ
ル１によつて防振ゴム５の動的荷重信号が得ら
れ、第２のピエゾロードセル３によつて第２の荷
重信号が得られる。今、加振機２の可動部２ａの
加速度をα、デツドマス４の重量をｍとすると、
第２の荷重信号によつて表わされる荷重Ｆは
Ｆ＝mα
となり、荷重Ｆと重量ｍが既知であるため、加速
度αが求められる。この加速度αを積分して得た
速度を更に積分することにより、変位、すなわち
防振ゴム５のたわみが求められる。 With the above configuration, when the vibrator 2 repeatedly applies a dynamic load to the vibration isolating rubber 5, the first piezo load cell 1 obtains a dynamic load signal of the vibration isolating rubber 5, and the second A second load signal is obtained by the piezo load cell 3. Now, if the acceleration of the movable part 2a of the vibrator 2 is α, and the weight of the dead mass 4 is m, then
The load F represented by the second load signal is F=mα, and since the load F and the weight m are known, the acceleration α can be determined. By further integrating the velocity obtained by integrating this acceleration α, the displacement, that is, the deflection of the vibration isolating rubber 5 is determined.
第１図に示すように、可動部２ａに１個の加速
度センサーしか取付られていない場合には、防振
ゴム５のアンバランスなどにより、特に高域で可
動部２ａが横ブレすると、加速度センサーによつ
て得られる加速度信号には計測誤差が導入される
ようになる。 As shown in FIG. 1, when only one acceleration sensor is attached to the movable part 2a, if the movable part 2a laterally shakes, especially at high frequencies, due to unbalance of the anti-vibration rubber 5, the acceleration sensor A measurement error will be introduced into the acceleration signal obtained by this method.
第２図はこのような加速度信号の計測誤差をな
くするためになされた好ましい実施例を示し、第
１図の第２のピエゾロードセル３とデツドマス４
との代りに、第１図に示すように可動部２ａに取
付けられた取付テーブル６の可動部２ａについて
対称な位置に、各々第２のロードセル３′とデツ
ドマス４′とからなる４つの加速度センサーを取
付け、これらのセンサーからの信号を相加平均し
て、すなわち４つの信号を加算して４で割つて加
速度信号を得ている。このように相加平均して得
た加速度信号は、可動部２ａに横ブレがあつた
も、可動部２ａの真の加速度に極めて近い加速度
を示すことになる。この第２図の実施例の加速度
センサーで得られる加速度信号は第１図で得られ
るものと位相が180゜ずれている。 FIG. 2 shows a preferred embodiment made to eliminate such measurement errors of acceleration signals, and the second piezo load cell 3 and dead mass 4 of FIG.
Instead, as shown in FIG. 1, four acceleration sensors each consisting of a second load cell 3' and a dead mass 4' are installed at symmetrical positions with respect to the movable part 2a of the mounting table 6 attached to the movable part 2a. is attached, and the signals from these sensors are arithmetic averaged, that is, the four signals are added and divided by four to obtain the acceleration signal. The acceleration signal obtained by arithmetic averaging in this way shows an acceleration that is extremely close to the true acceleration of the movable part 2a even if the movable part 2a has a lateral shake. The acceleration signal obtained by the acceleration sensor of the embodiment shown in FIG. 2 is out of phase with that obtained in FIG. 1 by 180 degrees.
なお、図示実施例では、被験体としての防振ゴ
ム５を加動部２ａと第１のピエゾロードセル１と
の間に配列しているが、基礎Ｂと第１のロードセ
ル１との間に被験体を配列できるように、第１の
ロードセル１を可動部２ａの方に固定して取付け
るようにしてもよい。 In the illustrated embodiment, the vibration isolating rubber 5 as a test object is arranged between the moving part 2a and the first piezo load cell 1, but the test object is arranged between the base B and the first load cell 1. The first load cell 1 may be fixedly attached to the movable part 2a so that the bodies can be arranged.
第１図は本発明による防振ゴムの動的特性測定
装置を一部破断して示す側面図、及び第２図は第
１図の一部分の変形例を示す斜視図である。
Ｂ……基礎、１……第１のピエゾロードセル、
２……加振機、２ａ……可動部、３，３′……第
２のピエゾロードセル、４，４′……デツドマス、
５……防振ゴム。
FIG. 1 is a partially cutaway side view showing a dynamic characteristic measuring device for vibration isolating rubber according to the present invention, and FIG. 2 is a perspective view showing a modification of a portion of FIG. 1. B...Basic, 1...First piezo load cell,
2... Vibrator, 2a... Movable part, 3, 3'... Second piezo load cell, 4, 4'... Dead mass,
5... Anti-vibration rubber.
Claims (1)
との間に被験体としての防振ゴムと直列に配列し
た第１のピエゾロードセルと、前記可動部に取付
けた前記第１のピエゾロードセルと同種の第２の
ピエゾロードセル及び該第２のピエゾロードセル
に取付けたデツドマスからなり、前記第２のピエ
ゾロードセルが発生する動的荷重信号及び前記デ
ツドマスの質量とにより求められる加速度信号を
発生する加速度センサーとを備え、前記第１のピ
エゾロードセルが発生する動的荷重信号と前記加
速度センサーが発生する加速度信号とに基き防振
ゴムの動的特性を測定するようになしたことを特
徴とする防振ゴムの動的特性測定装置。 ２ 前記加速度センサーを前記可動部について対
称な位置に複数配列し、これらのセンサーからの
信号を相加平均して加速度信号を得るようにした
ことを特徴とする特許請求の範囲第１項記載の防
振ゴムの動的特性測定装置。[Scope of Claims] 1. A first piezo load cell arranged in series with a vibration isolating rubber serving as a test object between a foundation and a movable part of a vibration exciter that generates a repetitive load; A second piezo load cell of the same type as the first piezo load cell and a dead mass attached to the second piezo load cell, and an acceleration determined from a dynamic load signal generated by the second piezo load cell and the mass of the dead mass. and an acceleration sensor that generates a signal, and the dynamic characteristics of the anti-vibration rubber are measured based on the dynamic load signal generated by the first piezo load cell and the acceleration signal generated by the acceleration sensor. A device for measuring the dynamic characteristics of anti-vibration rubber. 2. A plurality of the acceleration sensors are arranged at symmetrical positions with respect to the movable part, and signals from these sensors are arithmetic averaged to obtain an acceleration signal. A device for measuring the dynamic properties of anti-vibration rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14561780A JPS5769229A (en) | 1980-10-20 | 1980-10-20 | Measuring device for dynamic characteristics of rubber vibration insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14561780A JPS5769229A (en) | 1980-10-20 | 1980-10-20 | Measuring device for dynamic characteristics of rubber vibration insulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5769229A JPS5769229A (en) | 1982-04-27 |
| JPH0128332B2 true JPH0128332B2 (en) | 1989-06-02 |
Family
ID=15389165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14561780A Granted JPS5769229A (en) | 1980-10-20 | 1980-10-20 | Measuring device for dynamic characteristics of rubber vibration insulator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5769229A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015010963A (en) * | 2013-06-28 | 2015-01-19 | 国立大学法人 東京大学 | Measurement device |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104677756A (en) * | 2013-12-02 | 2015-06-03 | 国家电网公司 | Synthetical fatigue testing system and method for extensional vibration and torsion of composite insulator |
| RU2650848C1 (en) * | 2017-06-19 | 2018-04-17 | Олег Савельевич Кочетов | Method of testing multimass vibration isolation systems |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5565138A (en) * | 1978-11-10 | 1980-05-16 | Saginomiya Seisakusho Inc | Measuring unit of dynamic characteristic of vibration- proof rubber |
-
1980
- 1980-10-20 JP JP14561780A patent/JPS5769229A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5565138A (en) * | 1978-11-10 | 1980-05-16 | Saginomiya Seisakusho Inc | Measuring unit of dynamic characteristic of vibration- proof rubber |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015010963A (en) * | 2013-06-28 | 2015-01-19 | 国立大学法人 東京大学 | Measurement device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5769229A (en) | 1982-04-27 |
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