JPH0161170B2 - - Google Patents
Info
- Publication number
- JPH0161170B2 JPH0161170B2 JP22746282A JP22746282A JPH0161170B2 JP H0161170 B2 JPH0161170 B2 JP H0161170B2 JP 22746282 A JP22746282 A JP 22746282A JP 22746282 A JP22746282 A JP 22746282A JP H0161170 B2 JPH0161170 B2 JP H0161170B2
- Authority
- JP
- Japan
- Prior art keywords
- probe
- pedestal
- detection
- vibration detection
- resonance
- 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
- 239000000523 sample Substances 0.000 claims description 38
- 238000001514 detection method Methods 0.000 claims description 33
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 18
- 239000002184 metal Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】
本発明は機械装置などの回転部の振動を検出す
る振動検出プローブに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration detection probe that detects vibrations of a rotating part of a mechanical device or the like.
振動検出プローブには各機械に固定する固定方
式と持ち運び可能な可搬方式とあり、また検出セ
ンサとして動電形・圧電形などがあるが、本発明
は特に圧電素子を用いた可搬形の振動検出プロー
ブにかゝわる。第１図は従来の振動検出プローブ
の正面断面図である。この振動検出プローブは探
触針と検出部とホルダー部とから構成されてい
る。探触針１は円錐状をなし、その基部のフラン
ジ部分にはねじ２が刻設され、その上面に台座３
が一体的に固着されている。二つの圧電振動子
４，４′を電極板１０を介して接合した圧電素子
が負荷質量９と検出部筐体５の内側底面との間に
ねじにより螺着され、さらにこの検出部筐体５が
ねじ６により前記台座３に螺着されている。ホル
ダー部７は検出部筐体５を覆うように探触針１の
フランジ部分でねじ２により螺着されている。探
触針１の先端部を振動している被検出体に当接す
ると負荷質量９が振動することにより圧電振動子
４，４′に生じた電圧信号は電極板１０からのリ
ード線と検出部筐体５とを経てケーブル８により
計測器本体（図示しない）に導かれる。この振動
検出プローブは第２図の振動共振特性に示すよう
に複数個の共振点をもつている。同図でａは探触
針１の先端部と被検出体との接触に起因する接触
共振であり、ｂは検出部筐体５と台座３との接触
に起因する接触共振である。ｃは縦共振と呼ばれ
るもので、探触針１の形状・寸法・材質によりき
まるものである。振動検出プローブはｂの接触共
振を利用して感度をたかめ振動検出を行なう。し
かしこの接触共振は接触面の状態で個々に異な
り、ねじ６の締付けトルクにより移動する。また
隣接する縦共振との結合共振により共振点附近の
周波数特性が微妙にかわる。従つて個々の振動検
出プローブごとに出力が変わり較正を要するとい
う欠点があつた。 There are two types of vibration detection probes: a fixed type that is fixed to each machine and a portable type that can be carried around.Also, there are electrodynamic types and piezoelectric types as detection sensors. Relating to detection probes. FIG. 1 is a front sectional view of a conventional vibration detection probe. This vibration detection probe is composed of a probe needle, a detection section, and a holder section. The probe needle 1 has a conical shape, a screw 2 is carved in the flange part of its base, and a pedestal 3 is provided on the top surface of the probe needle 1.
are integrally fixed. A piezoelectric element in which two piezoelectric vibrators 4 and 4' are joined together via an electrode plate 10 is screwed between the load mass 9 and the inner bottom surface of the detection unit housing 5, and is further screwed into the detection unit housing 5. is screwed onto the base 3 with screws 6. The holder part 7 is screwed onto the flange portion of the probe needle 1 with screws 2 so as to cover the detection part housing 5 . When the tip of the probe 1 comes into contact with a vibrating object to be detected, the load mass 9 vibrates, and the voltage signal generated in the piezoelectric vibrators 4 and 4' is transmitted to the lead wire from the electrode plate 10 and the detection section. The cable 8 passes through the housing 5 and is guided to the main body of the measuring instrument (not shown). This vibration detection probe has a plurality of resonance points, as shown in the vibration resonance characteristics of FIG. In the figure, a indicates contact resonance caused by the contact between the tip of the probe 1 and the object to be detected, and b indicates contact resonance caused by the contact between the detection unit housing 5 and the pedestal 3. c is called longitudinal resonance, and is determined by the shape, dimensions, and material of the probe needle 1. The vibration detection probe uses contact resonance b to increase sensitivity and perform vibration detection. However, this contact resonance differs depending on the condition of the contact surface, and moves depending on the tightening torque of the screw 6. Furthermore, the frequency characteristics near the resonance point change slightly due to coupled resonance with adjacent longitudinal resonances. Therefore, there was a drawback that the output varied for each vibration detection probe and calibration was required.
本発明の目的は上記の欠点を除去し、構造上安
定な、信頼のできる測定が可能な振動検出プロー
ブを提供することにある。 The object of the present invention is to eliminate the above-mentioned drawbacks and to provide a vibration detection probe which is structurally stable and allows reliable measurements.
本発明による振動検出プローブは探触針と検出
部とホルダー部とからなり、探触針が外周に周溝
を有する台座と一体構造をなし、前記台座に検出
部の圧電素子が締付けねじにより直接装着されて
いることを特徴とする。 The vibration detection probe according to the present invention consists of a probe needle, a detection part, and a holder part, and the probe needle has an integral structure with a pedestal having a circumferential groove on the outer periphery, and the piezoelectric element of the detection part is directly attached to the pedestal by a tightening screw. It is characterized by being installed.
以下図面を参照して本発明を詳しく説明する。
第３図が本発明の一実施例の正面断面図である。
基部のフランジ部分にねじ１０２が刻設されてい
る探触針１０１は台座１０３と一体構造になつて
いる。圧電振動子１０４，１０４′負荷質量１０
５よりなる検出部の圧電素子は、第１図のように
筐体に組込まず、直接に締付けねじ１０６で前記
台座１０３に螺着されている。ホルダー部は探触
針１０１のフランジ部分にねじ１０２により螺着
された金属円筒カバー１１１とそれに螺合する円
筒カバー１１２との二段構造になつている。第１
図の従来例では筐体が検出部からの電圧信号の一
の伝達路であつたが、本発明の構造ではホルダー
部の金属円筒カバー１１１と、前記の二つの円筒
カバー１１１，１１２の間隙に押圧力をうけて挾
持されている金属性のコネクタ保持板１１０とが
伝達路になる。すなわち圧電振動子１０４，１０
４′には極性を異にする電圧が発生し、台座１０
３、金属円筒カバー１１１、コネクタ保持板１１
０を経てコネクタ１０９でケーブルのシールド線
に伝達される。圧電振動子１０４，１０４′を区
画する電極板１０７はリード線によりコネクタ１
０９でケーブル１０８の芯線に連結されている。 The present invention will be described in detail below with reference to the drawings.
FIG. 3 is a front sectional view of one embodiment of the present invention.
The probe needle 101, which has a screw 102 carved into the flange portion of its base, has an integral structure with a pedestal 103. Piezoelectric vibrator 104, 104' load mass 10
The piezoelectric element of the detection section 5 is not assembled into the housing as shown in FIG. 1, but is directly screwed onto the base 103 with a tightening screw 106. The holder part has a two-tiered structure including a metal cylindrical cover 111 screwed onto the flange portion of the probe needle 101 with screws 102 and a cylindrical cover 112 screwed onto the metal cylindrical cover 111. 1st
In the conventional example shown in the figure, the casing was one transmission path for the voltage signal from the detection section, but in the structure of the present invention, the metal cylindrical cover 111 of the holder section and the gap between the two cylindrical covers 111 and 112 are The metallic connector holding plate 110, which is held under pressure, serves as a transmission path. That is, piezoelectric vibrators 104, 10
4', voltages with different polarities are generated, and the pedestal 10
3. Metal cylindrical cover 111, connector holding plate 11
0 and is transmitted to the shield wire of the cable at the connector 109. The electrode plate 107 that partitions the piezoelectric vibrators 104 and 104' is connected to the connector 1 by a lead wire.
09 is connected to the core wire of the cable 108.
台座１０３は外周に周溝１１３が設けられてい
る。図では周溝１１３の位置が台座の下方で探触
針１０１のフランジ部分と接するところにある
が、これより上方においてもよい。 A circumferential groove 113 is provided on the outer periphery of the pedestal 103. In the figure, the position of the circumferential groove 113 is below the pedestal and in contact with the flange portion of the probe needle 101, but it may be located above this.
上記の構造によりこの振動検出プローブの共振
特性が著しく改善される。まず検出部は締付けね
じ１０６で直接に台座１０３に螺着しているか
ら、従来例の筐体と台座との接触に起因する第２
図に示したｂの接触共振はなくなる。そして本発
明ではｃの縦共振を利用して振動検出を行なうの
であるが、縦共振は探触針１０１と台座１０３と
の一体構造の形状・寸法・材質で設計によりきま
るものであるから、信頼度の高い振動検出データ
が得られる。ただし上記の構造では圧電振動子１
０４，１０４′の位置が探触針１０１のフランジ
部分に極めて近くなつているから、振動計測の際
いわゆるベース歪に起因するノイズが発生する。
すなわち計測の際、全体がゴムカバー１１４で保
護されたプローブを手で把握し、探触針１０１を
被測定回転部に垂直に保持し測定するが、このと
きの手によるプローブ把握力は極めて大きく、ま
たホルダー部は一部金属円筒カバー１１１である
から外力の伝達が大きいので検出出力（ノイズ）
が生ずるのである。しかし本発明による構造では
台座１０３の下部に周溝１１３を設けることによ
つて有効にベース歪を減少させている。第４図に
周溝１１３の効果を実験的に検討した結果を示し
ている。周溝部直径と台座直径との比を0.5程度
にすればベース歪による外力による出力は周溝を
設けない場合の10％程度となり１万Ｇの衝撃を与
えても問題にならない程度になる。このように周
溝１１３を設けることで外部よりの力の伝達路が
実効的に増大した効果を得る。 The above structure significantly improves the resonance characteristics of this vibration detection probe. First, since the detection unit is screwed directly onto the pedestal 103 with the tightening screw 106, the second
The contact resonance b shown in the figure disappears. In the present invention, vibration detection is performed using the longitudinal resonance of c. However, since the longitudinal resonance is determined by the design of the integral structure of the probe 101 and the pedestal 103, the shape, dimensions, and material are determined by the design. Highly accurate vibration detection data can be obtained. However, in the above structure, piezoelectric vibrator 1
Since the positions of 04 and 104' are extremely close to the flange portion of the probe needle 101, noise due to so-called base distortion occurs during vibration measurement.
That is, during measurement, the probe, which is entirely protected by the rubber cover 114, is grasped by hand, and the probe needle 101 is held perpendicular to the rotating part to be measured. Also, since the holder part is partially made of a metal cylindrical cover 111, the transmission of external force is large, so the detection output (noise) is
occurs. However, in the structure according to the present invention, the base distortion is effectively reduced by providing the circumferential groove 113 in the lower part of the pedestal 103. FIG. 4 shows the results of an experimental study on the effect of the circumferential groove 113. If the ratio of the circumferential groove diameter to the pedestal diameter is set to about 0.5, the output due to external force due to base distortion will be about 10% of that in the case where no circumferential groove is provided, and it will not be a problem even if an impact of 10,000 G is applied. By providing the circumferential groove 113 in this manner, an effect is obtained in which the transmission path for external force is effectively increased.
以上説明したように、本発明による振動検出プ
ローブは探触針および台座の構造・寸法・材質等
によりきまる一意的な縦共振を利用し、また台座
に周溝を設け外力の伝達を防ぎベース歪によるノ
イズを減少することで、プローブを手で把持し振
動計測するに最も適した構造となつている。また
圧電素子を筐体に封入せず直接に台座に固定する
ことからプローブ全体として従来例に比し小形化
され振動計測時の把握が容易である利点を有す
る。 As explained above, the vibration detection probe according to the present invention utilizes unique longitudinal resonance determined by the structure, dimensions, materials, etc. of the probe needle and pedestal, and also has a circumferential groove in the pedestal to prevent transmission of external force and to prevent base distortion. By reducing noise caused by vibration, the structure is most suitable for holding the probe in the hand and measuring vibrations. Furthermore, since the piezoelectric element is not enclosed in a housing and is directly fixed to the pedestal, the probe as a whole has the advantage of being smaller in size than the conventional example and being easier to grasp when measuring vibrations.
第１図は従来の振動検出プローブの正面断面
図、第２図は第１図のプローブの振動共振特性を
示す図、第３図は本発明の一実施例の正面断面
図、第４図はベース歪に関する実験データを示す
図である。
１０１……探触針、１０２，１０６……ねじ、
１０３……台座、１０４，１０４′……圧電振動
子、１０５……負荷質量、１０７……電極板、１
０８……ケーブル、１０９……コネクタ、１１０
……コネクタ保持板、１１１……金属円筒カバ
ー、１１２……円筒カバー、１１３……周溝、１
１４……ゴムカバー。
FIG. 1 is a front sectional view of a conventional vibration detection probe, FIG. 2 is a diagram showing the vibration resonance characteristics of the probe in FIG. 1, FIG. 3 is a front sectional view of an embodiment of the present invention, and FIG. FIG. 3 is a diagram showing experimental data regarding base distortion. 101... Probe needle, 102, 106... Screw,
103... Pedestal, 104, 104'... Piezoelectric vibrator, 105... Load mass, 107... Electrode plate, 1
08...Cable, 109...Connector, 110
... Connector holding plate, 111 ... Metal cylindrical cover, 112 ... Cylindrical cover, 113 ... Circumferential groove, 1
14...Rubber cover.
Claims (1)
検出プローブにおいて、探触針が外周に周溝を有
する台座と一体構造をなし、前記台座に検出部の
圧電素子が締付けねじにより直接装着されている
ことを特徴とする振動検出プローブ。1 In a vibration detection probe consisting of a probe needle, a detection part, and a holder part, the probe needle has an integral structure with a pedestal having a circumferential groove on the outer periphery, and a piezoelectric element of the detection part is directly attached to the pedestal with a tightening screw. A vibration detection probe characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22746282A JPS59120923A (en) | 1982-12-28 | 1982-12-28 | Oscillation detecting probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22746282A JPS59120923A (en) | 1982-12-28 | 1982-12-28 | Oscillation detecting probe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59120923A JPS59120923A (en) | 1984-07-12 |
| JPH0161170B2 true JPH0161170B2 (en) | 1989-12-27 |
Family
ID=16861248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22746282A Granted JPS59120923A (en) | 1982-12-28 | 1982-12-28 | Oscillation detecting probe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59120923A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7319692B2 (en) * | 2021-02-08 | 2023-08-02 | 株式会社ミヤワキ | Measuring device and its manufacturing method |
| JP7411237B2 (en) * | 2021-02-09 | 2024-01-11 | 株式会社ミヤワキ | Vibration probes and measurement equipment |
-
1982
- 1982-12-28 JP JP22746282A patent/JPS59120923A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59120923A (en) | 1984-07-12 |
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