JPH0376691B2 - - Google Patents
Info
- Publication number
- JPH0376691B2 JPH0376691B2 JP2564384A JP2564384A JPH0376691B2 JP H0376691 B2 JPH0376691 B2 JP H0376691B2 JP 2564384 A JP2564384 A JP 2564384A JP 2564384 A JP2564384 A JP 2564384A JP H0376691 B2 JPH0376691 B2 JP H0376691B2
- Authority
- JP
- Japan
- Prior art keywords
- case
- support
- attached
- accelerometer
- partition wall
- 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
- 238000005259 measurement Methods 0.000 claims description 16
- 238000005192 partition Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/20—Arrangements of receiving elements, e.g. geophone pattern
- G01V1/201—Constructional details of seismic cables, e.g. streamers
Landscapes
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】 ［発明の技術分野］ 本発明はケーブル管路内振動測定装置に係る。[Detailed description of the invention] [Technical field of invention] The present invention relates to a cable conduit vibration measuring device.
［発明と技術的背景とその問題点］
道路直下または橋梁に布設されたケーブルに
は、車両の走行に基づく振動により車両の進行方
向に移動する現象（波乗り現象）を生じる。この
現象が増大すると、ケーブルに応力が蓄積され事
故が発生するおそれがある。この現象の実態を把
握するため、現場で種々の計測がなされ、得られ
たデータの解析がなされているが、その中でケー
ブルを布設する管路の振動測定が重要である。[Invention, technical background, and problems thereof] A phenomenon in which cables installed directly under roads or on bridges move in the direction of travel of the vehicle (wave riding phenomenon) occurs due to vibrations caused by the running of the vehicle. If this phenomenon increases, stress may accumulate in the cable and an accident may occur. In order to understand the actual state of this phenomenon, various measurements are being taken on site and the data obtained is being analyzed, and among these measurements, vibration measurement of the conduit in which the cable is installed is important.
管路の振動の測定は、管路内に加速度計を設置
して行うが、管路内での測定にあたるため、振動
測定装置の機能としては次のようなことが要求さ
れる。すなわち、
鉛直方向、管路軸方向、管路軸に垂直かつ水
平方向の３方向の加速度をそれぞれ測定する３
台の加速度計を管路に対して所定方向に正確に
設定されること、
管路内に引込み得る大きさであること、
防水構造であること、
トラブルが生じた場合ただちに外に取り出せ
るものであること、
等が要求される。 Vibration in a pipeline is measured by installing an accelerometer inside the pipeline, but since the measurement is performed inside the pipeline, the following functions are required of the vibration measuring device. In other words, acceleration is measured in three directions: vertically, in the pipe axis direction, and in the horizontal and vertical directions to the pipe axis.
The accelerometer on the stand must be set accurately in the specified direction with respect to the pipe, it must be large enough to be pulled into the pipe, it must be waterproof, and it must be able to be taken out immediately if a problem occurs. , etc. are required.
これらの中で最も困難なことは、項であり、
管路位置に対して加速度計をどのようにして設置
し固定するかである。固定方法としてはマグネツ
トを用いる方法が知られているが、これは測定デ
ータに電気的なノイズが入ること、管路が磁性を
有する鋼鉄管のものに限られるなどの欠点があ
る。 The most difficult of these is the term
The problem is how to install and fix the accelerometer in relation to the pipe position. A method using a magnet is known as a fixing method, but this has drawbacks such as electrical noise being introduced into the measurement data and the pipe line being limited to magnetic steel pipes.
［発明の目的］
本発明は上記の事情に基づきなされたもので、
鉛直、管路軸に垂直かつ水平、管路軸方向の３方
向に管路内ち正確に設定することができ、しかも
管路内に引入れることが可能であり、防水構造を
有するケーブル管路内振動測定装置を得ることを
目的としている。[Object of the invention] The present invention was made based on the above circumstances, and
A cable conduit that can be set accurately within the conduit in three directions: vertically, perpendicular and horizontal to the conduit axis, and in the direction of the conduit axis, and can be drawn into the conduit, and has a waterproof structure. The purpose is to obtain an internal vibration measuring device.
［発明の概要］
本発明のケーブル管路内振動測定装置は、円筒
状のケースと、このケース内、中間部に配設され
た支持台と、この支持台に取付けられ、支持台上
面に垂直な測定方向を有する加速度計と、同支持
台に取付けられ、ケースの軸線に平行な測定方向
を有する加速度計と、同支持台に取付けられ、支
持台横断面における水平方向の測定方向を有する
加速度計と、同支持台に取付けられ、支持台の回
転角度を検出するポテンシヨメータと、ケース両
端近傍をそれぞれ水密に閉塞する隔壁と、隔壁に
装着され、ケース径方向に往復動する出力軸を有
するシリンダと、一端が隔壁中心部に結着されて
ケースの軸線方向に延在され、かつ他端にワイヤ
ー係止部を設けられた牽引軸とを有することを特
徴とする。[Summary of the Invention] The in-cable conduit vibration measuring device of the present invention includes a cylindrical case, a support stand disposed in the middle part of the case, and a support stand that is attached to the support stand and that is perpendicular to the top surface of the support stand. an accelerometer mounted on the same support and having a measurement direction parallel to the axis of the case; and an accelerometer mounted on the same support and having a measurement direction in the horizontal direction in the cross section of the support. a potentiometer that is attached to the support base and detects the rotation angle of the support base, a bulkhead that watertightly closes the vicinity of both ends of the case, and an output shaft that is attached to the bulkhead and reciprocates in the case radial direction. and a traction shaft whose one end is connected to the center of the partition wall and extends in the axial direction of the case, and whose other end is provided with a wire locking portion.
［発明の実施例］
第１図において、円筒状のケース１内の中間部
１ａに、横断面弓形の支持台３が配設され、支持
台３の両端に円筒形の隔壁２が溶接により連結さ
れている。隔壁２は外周面にパツキング４が嵌着
され、ケース１内周面に水密に接触しており、ケ
ース１両端近傍をそれぞれ水密に閉塞している。[Embodiment of the Invention] In FIG. 1, a support base 3 having an arcuate cross section is provided in an intermediate portion 1a within a cylindrical case 1, and cylindrical partition walls 2 are connected to both ends of the support base 3 by welding. has been done. Packing 4 is fitted onto the outer peripheral surface of the partition wall 2 and is in watertight contact with the inner peripheral surface of the case 1, thereby watertightly closing the vicinity of both ends of the case 1.
支持台３上面には、測定方向を支持台３上面に
垂直にした加速度計６、測定方向をケース１の軸
線方向とした加速度計７、測定方向を支持台３の
横断面における水平方向とした加速度計５の３個
の加速度計が取付けられている。また支持台３上
に、支持台３の回転角度を検出するポテンシヨメ
ータ８，９，１０が取付けられている。これらの
ポテンシヨメータのうち８と９とは支持台３横断
面における回転角度を検出するものであり、他の
１０は支持台３縦断面における回転角度を検出す
るものである。なお、各ポテンシヨメータ８，
９，１０はそれぞれ振子８ａ，９ａ，１０ａと協
働し、支持台３の横断面に対する角度に比例した
信号を発生する。隔壁２，２にはそれぞれ出力軸
１１がケース１の径方向に往復動するエアシリン
ダ１２を取付けてある。 On the top surface of the support stand 3, there is an accelerometer 6 whose measurement direction is perpendicular to the top surface of the support stand 3, an accelerometer 7 whose measurement direction is the axial direction of the case 1, and an accelerometer 7 whose measurement direction is the horizontal direction in the cross section of the support stand 3. Three accelerometers, accelerometer 5, are installed. Furthermore, potentiometers 8, 9, and 10 are mounted on the support base 3 to detect the rotation angle of the support base 3. Of these potentiometers, 8 and 9 are for detecting the rotation angle in the cross section of the support base 3, and the other 10 are for detecting the rotation angle in the vertical cross section of the support base 3. In addition, each potentiometer 8,
9 and 10 cooperate with pendulums 8a, 9a and 10a, respectively, to generate signals proportional to the angle with respect to the cross section of the support base 3. Air cylinders 12 whose output shafts 11 reciprocate in the radial direction of the case 1 are attached to the partition walls 2, 2, respectively.
また、エアシリンダ１２に空気を供給するホー
ス１３および各加速度計、ポテンシヨメータに給
電するケーブル、その制御のための信号線１４は
隔壁２から水密にケース１内に引込まれている。
隔壁２の中心部に、一端が結着されてケース１の
軸線方向に延在された牽引軸１５が設けられてい
る。牽引軸他端にはアイナツトのようなワイヤー
係止部１６が撚り戻し器１７を介して連結されて
いる。 Further, a hose 13 for supplying air to the air cylinder 12, cables for supplying power to each accelerometer and potentiometer, and a signal line 14 for controlling the same are drawn into the case 1 from the partition wall 2 in a watertight manner.
A traction shaft 15 is provided at the center of the partition wall 2 and has one end tied to the traction shaft 15 and extends in the axial direction of the case 1 . A wire locking portion 16 like an eye nut is connected to the other end of the traction shaft via an untwisting device 17.
上記構成の本発明振動測定装置は、エアシリン
ダ１２の出力軸１１先端がケース１の周面より内
側となるようにして、ワイヤー係止部１６にワイ
ヤーロープを取付け、管路１８内の所定の測定位
置に引入れる。この時、支持板３はケース１に対
して固定されているが、ワイヤー係止部１６に撚
り戻し器１７が付属していることと、支持台３が
おもりの役目をすることから、支持台３の上面が
ほぼ水平状態となる。 In the vibration measuring device of the present invention having the above configuration, a wire rope is attached to the wire locking part 16 so that the tip of the output shaft 11 of the air cylinder 12 is inside the circumferential surface of the case 1, and a predetermined position in the conduit 18 is installed. Pull it into the measurement position. At this time, the support plate 3 is fixed to the case 1, but since the untwister 17 is attached to the wire locking part 16 and the support base 3 acts as a weight, the support plate 3 is fixed to the case 1. The top surface of 3 is almost horizontal.
所定の測定位置に引入れた後、エアシリンダ１
２を作動させて出力軸１１を外方に突出させ、管
路１８内壁を押しつけることにより装置全体を管
路１８に固定する。このとき、装置が管路１８の
横断面に対して第４図に示すように、ある角度θ
傾いて固定された場合、実振巾Ax，Ayは第５図
に示される関係となることから、次式で表わされ
る。 After pulling into the specified measurement position, air cylinder 1
2 is activated to cause the output shaft 11 to protrude outward, and the entire apparatus is fixed to the conduit 18 by pressing against the inner wall of the conduit 18. At this time, as shown in FIG.
When it is tilted and fixed, the actual vibration widths Ax and Ay have the relationship shown in FIG. 5, and are therefore expressed by the following equation.
Ax＝M1 cosθ＋M2 sinθ
Ay＝M2 cosθ−M1 sinθ
ここで、M1，M2は測定された振巾、θは測定
器の傾きである。角度θはポテンシヨメータ８〜
１０で予め較正しておき、出力電圧と角度に変換
してAx，Ayを求める。 Ax = M 1 cos θ + M 2 sin θ Ay = M 2 cos θ − M 1 sin θ where M 1 and M 2 are the measured amplitudes, and θ is the inclination of the measuring instrument. Angle θ is potentiometer 8~
10, and convert it into output voltage and angle to find Ax and Ay.
［発明の効果］
本発明の装置は、加速度計の向きが管路に対し
て拘束されることなく所定に設定することができ
るので、管路の振動を簡単かつ正確に測定するこ
とができる。また、構造が簡単であるので、製作
が容易、故障が少ないという利点がある。また比
較的小型であるから管路への引入れを容易に行う
ことができる。さらに、防水構造とすることも容
易である。[Effects of the Invention] In the device of the present invention, the direction of the accelerometer can be set to a predetermined value without being restricted with respect to the conduit, so vibrations in the conduit can be easily and accurately measured. Furthermore, since the structure is simple, it has the advantage of being easy to manufacture and having fewer failures. Moreover, since it is relatively small, it can be easily introduced into the pipe. Furthermore, it is easy to provide a waterproof structure.
第１図は本発明による装置の一実施例を示す断
面図、第２図は同側面図、第３図は第１図−
線に沿う横断面図、第４図および第５図はそれぞ
れ同実施例の使用状態の説明図である。
１……ケース、２……隔壁、３……支持台、
５，６，７……加速度計、８，９，１０……ポテ
ンシヨメータ、１１……出力軸、１２……シリン
ダ、１５……牽引軸、１６……ワイヤー係止部、
１８……管路。
FIG. 1 is a sectional view showing an embodiment of the device according to the present invention, FIG. 2 is a side view of the same, and FIG.
The cross-sectional view taken along the line, FIG. 4, and FIG. 5 are explanatory views of the same embodiment in use, respectively. 1... Case, 2... Partition wall, 3... Support stand,
5, 6, 7... Accelerometer, 8, 9, 10... Potentiometer, 11... Output shaft, 12... Cylinder, 15... Traction shaft, 16... Wire locking part,
18... Pipeline.
Claims (1)
配設された支持台と、この支持台に取付けられ、
支持台上面に垂直な測定方向を有する加速度計
と、同支持台に取付けられ、ケースの軸線に平行
な測定方向を有する加速度計と、同支持台に取付
けられ、支持台横断面における水平方向の測定方
向を有する加速度計と、同支持台に取付けられ、
支持台の回転角度を検出するポテンシヨメータ
と、ケース両端近傍をそれぞれ水密に閉塞する隔
壁と、隔壁に装着され、ケース径方向に往復働す
る出力軸を有するシリンダと、一端が隔壁中心部
に結着されてケースの軸線方向に延在され、かつ
他端にワイヤー係止部を設けられた牽引軸とを備
えたことを特徴とするケーブル管路内振動測定装
置。1. A cylindrical case, a support stand disposed in the middle part of the case, and a support stand attached to the support stand,
An accelerometer that has a measurement direction perpendicular to the top surface of the support, an accelerometer that is attached to the support and has a measurement direction parallel to the axis of the case, and an accelerometer that is attached to the support and has a measurement direction that is parallel to the axis of the case, and An accelerometer having a measurement direction and attached to the same support base,
A potentiometer that detects the rotation angle of the support base, a partition wall that watertightly closes the vicinity of both ends of the case, a cylinder that is attached to the partition wall and has an output shaft that reciprocates in the radial direction of the case, and one end that is attached to the center of the partition wall. 1. An apparatus for measuring vibration in a cable conduit, comprising a traction shaft that is tied together and extends in the axial direction of a case, and has a wire locking portion at the other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2564384A JPS60169721A (en) | 1984-02-13 | 1984-02-13 | Vibration measuring device in cable conduit line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2564384A JPS60169721A (en) | 1984-02-13 | 1984-02-13 | Vibration measuring device in cable conduit line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60169721A JPS60169721A (en) | 1985-09-03 |
| JPH0376691B2 true JPH0376691B2 (en) | 1991-12-06 |
Family
ID=12171511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2564384A Granted JPS60169721A (en) | 1984-02-13 | 1984-02-13 | Vibration measuring device in cable conduit line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60169721A (en) |
-
1984
- 1984-02-13 JP JP2564384A patent/JPS60169721A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60169721A (en) | 1985-09-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |