JPH10123195A - Method and device for detecting defect of insulation electric wire - Google Patents
Method and device for detecting defect of insulation electric wireInfo
- Publication number
- JPH10123195A JPH10123195A JP8274923A JP27492396A JPH10123195A JP H10123195 A JPH10123195 A JP H10123195A JP 8274923 A JP8274923 A JP 8274923A JP 27492396 A JP27492396 A JP 27492396A JP H10123195 A JPH10123195 A JP H10123195A
- Authority
- JP
- Japan
- Prior art keywords
- insulated wire
- magnetic field
- electric wire
- conductor
- insulated
- 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
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、絶縁電線の欠陥検
出方法およびその装置に係り、特に、架空配電線等の絶
縁電線における導体の応力腐食割れや素線切れ等に基づ
く欠陥部を、高い精度で検出する技術に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for detecting a defect in an insulated wire, and more particularly, to a method for detecting a defective portion of an insulated wire such as an overhead distribution line due to stress corrosion cracking or broken wire of a conductor. The present invention relates to a technique for detecting with high accuracy.
【０００２】[0002]
【従来の技術】架空配電線等の絶縁電線における導体部
分に、応力腐食割れや素線切れ等に基づく欠陥部が生じ
ているか否かを検出する技術として、図４に示すよう
に、絶縁電線１の回りに例えば２個の磁界センサ（サー
チコイル）２を１８０度間隔で配して、絶縁電線１に流
れる負荷電流によって生じる磁界を検出するとともに、
該磁界センサ２の出力を、ローパスフィルタ３，プリア
ンプ４を経由して差動増幅器５に送り込み、差電圧を別
のローパスフィルタ６を経由して電圧計等に出力して計
測を行なう方法が知られている。2. Description of the Related Art As a technique for detecting whether or not a defective portion due to stress corrosion cracking or broken wire has occurred in a conductor portion of an insulated wire such as an overhead distribution wire, as shown in FIG. For example, two magnetic field sensors (search coils) 2 are arranged at 180 ° intervals around 1 to detect a magnetic field generated by a load current flowing through the insulated wire 1 and
A method is known in which the output of the magnetic field sensor 2 is sent to a differential amplifier 5 via a low-pass filter 3 and a preamplifier 4, and the difference voltage is output to a voltmeter or the like via another low-pass filter 6 for measurement. Have been.
【０００３】[0003]
【発明が解決しようとする課題】しかし、２個の磁界セ
ンサ２で絶縁電線１の磁界を検出した場合、図５に示す
ように、２個の磁界センサ２が導体１ａの中心に対して
等距離に配されている場合には、導体１ａの異常を正確
に検出することができるものの、図６に示すように、絶
縁電線１に対して２個の磁界センサ２が片寄って配され
ている場合、あるいは、図７に示すように、絶縁被覆１
ｂの表面に有する突条部（ヒレ）等の突出部１ｃが、磁
界センサ２を支持している支持構造物Ｓの穴ｈの内壁面
に接触することにより、絶縁電線１に片寄りが生じる場
合等であると、導体１ａの欠陥の有無に関係なく２個の
磁界センサ２の差電圧（Ｖ2 −Ｖ1 ）が出力されてしま
うため、異常の有無の判別精度が損なわれてしまう。However, when the magnetic field of the insulated wire 1 is detected by the two magnetic field sensors 2, as shown in FIG. 5, the two magnetic field sensors 2 are positioned at the center of the conductor 1 a. When arranged at a distance, the abnormality of the conductor 1a can be accurately detected, but as shown in FIG. In the case, or as shown in FIG.
When the protrusion 1c such as a ridge (fin) on the surface of b contacts the inner wall surface of the hole h of the support structure S supporting the magnetic field sensor 2, the insulated wire 1 is shifted. In such a case, the difference voltage (V 2 −V 1 ) between the two magnetic field sensors 2 is output irrespective of the presence or absence of a defect in the conductor 1a, so that the accuracy of determining whether there is an abnormality is impaired.
【０００４】本発明は、上述の事情に鑑みてなされたも
ので、以下の目的を達成するものである。 絶縁電線の絶縁被覆に、突条部等の突出部が設けられ
ている場合における検出誤差の発生を低減すること。 素線断線等の欠陥部の検出感度を向上させること。[0004] The present invention has been made in view of the above circumstances, and achieves the following objects. To reduce the occurrence of a detection error when a projecting portion such as a ridge is provided on an insulating coating of an insulated wire. Improving the detection sensitivity of defective parts such as broken wires.
【０００５】[0005]
【課題を解決するための手段】絶縁電線の導体に交番電
流を流した際に発生する磁界を検出して、導体に異常が
生じているか否かを判別する場合に、絶縁電線の回り
に、複数の位置決めローラにおける外周部の歯部を対向
状態に配して、絶縁電線の表面に位置決めローラを接触
または近接させて絶縁電線の位置を設定するとともに、
位置決めローラを絶縁電線の円周方向に転動させて、絶
縁電線の表面に設けられている突出部を、位置決めロー
ラの外周面の凹部に逃すことにより、絶縁電線における
導体の位置の変動を抑制する技術が採用される。交番電
流による磁界を検出する手段として磁界センサが配さ
れ、該磁界センサが電線挿通穴を有する支持具に取り付
けられ、該支持具に、外周部に歯部を有する複数の位置
決めローラが、電線挿通穴の内壁に円周方向に間隔を空
けて、１８０度離れた位置等に、外周面を対向させた状
態に配される。Means for Solving the Problems When detecting a magnetic field generated when an alternating current is applied to a conductor of an insulated wire and judging whether or not the conductor has an abnormality, when the insulated wire is turned around, Disposing the teeth of the outer peripheral portion of the plurality of positioning rollers in an opposed state, setting the position of the insulated wire by contacting or approaching the positioning roller to the surface of the insulated wire,
The positioning roller is rolled in the circumferential direction of the insulated wire, and the protrusion provided on the surface of the insulated wire is made to escape into the recess on the outer peripheral surface of the positioning roller, thereby suppressing fluctuations in the position of the conductor in the insulated wire. Technology is adopted. A magnetic field sensor is provided as means for detecting a magnetic field due to the alternating current, and the magnetic field sensor is attached to a support having an electric wire insertion hole. The holes are arranged at intervals in the circumferential direction on the inner wall of the hole, and are disposed 180 degrees apart or the like with their outer peripheral surfaces facing each other.
【０００６】[0006]
【発明の実施の形態】以下、本発明に係る絶縁電線の欠
陥検出方法およびその装置の一実施形態について、図１
ないし図３を参照して説明する。図１ないし図３におい
て、符号２は磁界センサ、Ｓは支持具、ｈは電線挿通
穴、１１は位置決めローラ、１２は歯部、１３は凹部、
１４は回転軸を示している。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method and an apparatus for detecting a defect of an insulated wire according to the present invention will be described below with reference to FIG.
This will be described with reference to FIG. 1 to 3, reference numeral 2 denotes a magnetic field sensor, S denotes a support, h denotes an electric wire insertion hole, 11 denotes a positioning roller, 12 denotes a tooth portion, 13 denotes a concave portion,
Reference numeral 14 denotes a rotation axis.
【０００７】前記磁界センサ２は、例えばボビンに細線
を密巻きしたものであり、巻き数，巻き径，寸法等が同
一特性であるもの（同型のもの）が２個組み合わせて用
いられる。該磁界センサ２は、支持具Ｓにおける電線挿
通穴ｈの内壁の近傍に内向状態に配され、図１に示すよ
うに、その１組のものが、電線挿通穴ｈに挿入される絶
縁電線１の円周方向に１８０度離れた状態に対向配置さ
れている。なお、磁界センサ２の出力信号は、前述した
図４に示す検出回路および方法を適用することにより処
理される。The magnetic field sensor 2 is, for example, a thin wire wound tightly around a bobbin, and two sensors (of the same type) having the same characteristics such as the number of turns, the winding diameter, and the dimensions are used in combination. The magnetic field sensor 2 is disposed inwardly in the vicinity of the inner wall of the wire insertion hole h of the support S, and as shown in FIG. Are arranged facing each other at a distance of 180 degrees in the circumferential direction. The output signal of the magnetic field sensor 2 is processed by applying the above-described detection circuit and method shown in FIG.
【０００８】前記支持具Ｓには、一対をなす磁界センサ
２に加えて、例えば３個の位置決めローラ１１が、その
外周部を電線挿通穴ｈの内壁面から突出させた状態に、
絶縁電線１の挿通方向に平行に配した回転軸１４により
回転可能にで取り付けられている。The support S has, in addition to a pair of magnetic field sensors 2, for example, three positioning rollers 11 in such a state that the outer peripheral portions thereof protrude from the inner wall surface of the electric wire insertion hole h.
The insulated wire 1 is rotatably mounted on a rotating shaft 14 arranged in parallel with the insertion direction.
【０００９】前記位置決めローラ１１は、図２等に示す
ように、外周部が歯車状とされて、歯部１２及び凹部１
３を有するものが採用される。該位置決めローラ１１
は、少なくとも一対のものが、電線挿通穴ｈの内壁面に
対して突出した状態に配されるとともに、その位置が磁
界センサ２に対して絶縁電線１の挿通方向に隣合わせで
並べた状態となるように設定され、図１例においては、
電線挿通穴ｈにおける円弧状内面ｃにも配されている。As shown in FIG. 2 and the like, the positioning roller 11 has a gear-shaped outer peripheral portion, and has a tooth portion 12 and a concave portion 1.
3 is adopted. The positioning roller 11
Is a state in which at least one pair is arranged so as to protrude from the inner wall surface of the electric wire insertion hole h, and the position thereof is arranged adjacent to the magnetic field sensor 2 in the insertion direction of the insulated electric wire 1. In the example of FIG. 1,
It is also arranged on the arcuate inner surface c in the electric wire insertion hole h.
【００１０】さらに、位置決めローラ１１は、その歯部
１２が絶縁電線１の表面に対して接触または近接状態と
なるように設定されるとともに、凹部１３が、絶縁電線
１の突出部１ｃを収容し得る大きさに形成されている。
なお、突出部１ｃは、突条のものが絶縁被覆１ｂと一体
に長手方向に沿って形成され、その大きさが、図３にお
けるＬ，Ｈ寸法が１ｍｍ程度で、曲率Ｒａ，Ｒｂが０．
３〜０．４ｍｍ程度である。Further, the positioning roller 11 is set such that its teeth 12 come into contact with or close to the surface of the insulated wire 1, and the recess 13 accommodates the protruding portion 1 c of the insulated wire 1. It is formed in a size that can be obtained.
The protruding portion 1c is formed in the form of a ridge along the longitudinal direction integrally with the insulating coating 1b, has a size of about 1 mm in L and H dimensions in FIG. 3, and has curvatures Ra and Rb of 0.1 mm.
It is about 3 to 0.4 mm.
【００１１】したがって、図１に示すように、絶縁電線
１を支持具Ｓの電線挿通穴ｈに挿通させると、絶縁電線
１の表面に位置決めローラ１１の歯部１２が接触または
近接状態となることにより、絶縁電線１と磁界センサ２
との位置設定が正確に行なわれ、磁界センサ２の検出値
に有意義な差が生じているか否かにより、導体１ａにお
ける応力腐食割れや素線切れ等の欠陥部の有無が判別さ
れる。Therefore, as shown in FIG. 1, when the insulated wire 1 is inserted into the wire insertion hole h of the support S, the teeth 12 of the positioning roller 11 come into contact with or close to the surface of the insulated wire 1. The insulated wire 1 and the magnetic field sensor 2
Is accurately set, and the presence or absence of a defective portion such as stress corrosion cracking or broken wire in the conductor 1a is determined based on whether or not a significant difference occurs in the detection value of the magnetic field sensor 2.
【００１２】一方、絶縁電線１及び支持具Ｓの間で相対
的な回転が生じて、絶縁電線１の突出部１ｃが位置決め
ローラ１１に接触すると、突出部１ｃ等と歯部１２との
接触により位置決めローラ１１が回転して、図２に示す
ように、突出部１ｃ等が凹部１３に収容された退避状態
となる。この際にも絶縁電線１の導体１ａと磁界センサ
２との相対位置のずれが生じることがなく、導体１ａに
欠陥部が生じているか否かを誤差なく検出することがで
きる。On the other hand, when relative rotation occurs between the insulated wire 1 and the support S, and the protrusion 1 c of the insulated wire 1 comes into contact with the positioning roller 11, the protrusion 1 c and the like and the teeth 12 contact each other. When the positioning roller 11 rotates, as shown in FIG. 2, the protrusion 1 c and the like are in a retracted state in which the protrusions 1 c and the like are accommodated in the recesses 13. Also in this case, the relative position between the conductor 1a of the insulated wire 1 and the magnetic field sensor 2 does not occur, and it is possible to detect without error whether or not the conductor 1a has a defect.
【００１３】[0013]
【発明の効果】本発明に係る絶縁電線の欠陥検出方法お
よびその装置によれば、磁界センサに位置決めローラを
並べて配置し、磁界センサと絶縁電線の表面とを接触ま
たは近接状態として、導体の異常の有無を判別するもの
であるから、以下のような効果を奏する。 （１） 位置決めローラで絶縁電線の位置を設定するこ
とにより、導体の欠陥部の検出精度を向上させることが
できる。 （２） 位置決めローラに凹部を設けて、絶縁電線にお
ける突条部等の突出部を退避させることにより、絶縁電
線の絶縁被覆に、突条部が設けられている場合や局部的
な突出部が形成されている場合における検出誤差の発生
を低減することができる。 （３） 位置決めローラを回転させることにより、絶縁
電線の挿通を円滑にして、異常の検出作業性を向上させ
ることができる。According to the method and apparatus for detecting defects in an insulated wire according to the present invention, positioning rollers are arranged side by side on a magnetic field sensor, and the magnetic field sensor and the surface of the insulated wire are brought into contact with or in proximity to each other to detect abnormalities in the conductor. Since the presence / absence is determined, the following effects are obtained. (1) By setting the position of the insulated wire with the positioning roller, the detection accuracy of the defective portion of the conductor can be improved. (2) By providing a concave portion in the positioning roller and retracting a protruding portion such as a ridge portion of the insulated wire, a case where the ridge portion is provided on the insulating coating of the insulated wire or a local protruding portion is formed. It is possible to reduce the occurrence of a detection error in the case where it is formed. (3) By rotating the positioning roller, the insertion of the insulated wire can be smoothly performed, and the workability of detecting an abnormality can be improved.
【図１】 本発明に係る絶縁電線の欠陥検出方法および
その装置の一実施形態を示す正面図である。FIG. 1 is a front view showing an embodiment of a method and a device for detecting a defect of an insulated wire according to the present invention.
【図２】 図１における位置決めローラの歯部と絶縁電
線の突出部との係合状況を示す正面図である。FIG. 2 is a front view showing an engagement state between a tooth portion of a positioning roller and a protruding portion of an insulated wire in FIG.
【図３】 図２における絶縁電線の突出部の拡大図であ
る。FIG. 3 is an enlarged view of a protruding portion of the insulated wire in FIG. 2;
【図４】 絶縁電線の欠陥部検出方法の従来技術を示す
結線図である。FIG. 4 is a connection diagram showing a conventional technique for detecting a defective portion of an insulated wire.
【図５】 図４の磁界センサと絶縁電線との配置状況を
示す正面図である。FIG. 5 is a front view showing the arrangement of the magnetic field sensor and the insulated wires of FIG. 4;
【図６】 図５の磁界センサが絶縁電線に対して片寄っ
た場合の検出状況を示す正面図である。FIG. 6 is a front view showing a detection state when the magnetic field sensor of FIG. 5 is offset with respect to the insulated wire.
【図７】 図５の絶縁電線が支持構造物の穴内で片寄っ
た場合の検出状況を示す正面図である。FIG. 7 is a front view showing a detection state when the insulated wire of FIG. 5 is offset in a hole of the support structure.
１ 絶縁電線 １ａ 導体 １ｂ 絶縁被覆 １ｃ 突出部 ２ 磁界センサ（サーチコイル） ３ ローパスフィルタ ４ プリアンプ ５ 差動増幅器 ６ ローパスフィルタ Ｓ 支持具 ｈ 電線挿通穴 ｃ 円弧状内面 １１ 位置決めローラ １２ 歯部 １３ 凹部 １４ 回転軸 DESCRIPTION OF SYMBOLS 1 Insulated electric wire 1a Conductor 1b Insulation coating 1c Projection 2 Magnetic field sensor (search coil) 3 Low-pass filter 4 Preamplifier 5 Differential amplifier 6 Low-pass filter S Support h Electric wire insertion hole c Arc-shaped inner surface 11 Positioning roller 12 Tooth 13 Recess 14 Axis of rotation
Claims (4)
流を流した際に発生する磁界を検出して、導体に異常が
生じているか否かを判別する方法であって、絶縁電線の
回りに、複数の位置決めローラ（１１）における外周部
の歯部（１２）を対向状態に配して、絶縁電線の表面に
前記歯部を接触または近接させて絶縁電線の位置を設定
するとともに、位置決めローラを絶縁電線の円周方向に
転動させて、絶縁電線の表面に設けられている突出部
（１ｃ）を、位置決めローラの外周部の凹部（１３）に
逃すことにより、絶縁電線における導体の位置の変動を
抑制した状態で磁界の検出を行なうことを特徴とする絶
縁電線の欠陥検出方法。1. A method of detecting a magnetic field generated when an alternating current flows through a conductor (1a) of an insulated wire (1) to determine whether or not the conductor has an abnormality. , The teeth (12) of the outer peripheral portion of the plurality of positioning rollers (11) are arranged to face each other, and the teeth are brought into contact with or close to the surface of the insulated wire to set the position of the insulated wire. By rolling the positioning roller in the circumferential direction of the insulated wire, the protrusion (1c) provided on the surface of the insulated wire is allowed to escape into the concave portion (13) on the outer periphery of the positioning roller, so that the insulated wire is insulated. A method for detecting a defect in an insulated wire, comprising: detecting a magnetic field in a state where a change in the position of a conductor is suppressed.
流を流した際に発生する磁界を検出して、導体に異常が
生じているか否かを判別する装置であって、絶縁電線が
挿通される電線挿通穴（ｈ）を有する支持具（Ｓ）と、
該支持具における電線挿通穴の近傍に配され交番電流を
流した際に発生する磁界を検出する磁界センサ（２）
と、前記電線挿通穴の内壁に円周方向に間隔を空けて配
され挿通状態の絶縁電線の表面に接触または近接させる
ことにより絶縁電線の位置を設定する複数の位置決めロ
ーラ（１１）とを具備することを特徴とする絶縁電線の
欠陥検出装置。2. A device for detecting a magnetic field generated when an alternating current flows through a conductor (1a) of an insulated wire (1), and determining whether or not the conductor has an abnormality. A support (S) having an electric wire insertion hole (h) through which
A magnetic field sensor (2) disposed near the wire insertion hole in the support for detecting a magnetic field generated when an alternating current flows;
And a plurality of positioning rollers (11) arranged on the inner wall of the electric wire insertion hole at intervals in the circumferential direction to contact or approach the surface of the insulated electric wire in the inserted state to set the position of the insulated electric wire. A defect detection device for an insulated wire.
車状の歯部（１２）が形成されていることを特徴とする
請求項２記載の絶縁電線の欠陥検出装置。3. The defect detecting device for an insulated wire according to claim 2, wherein a gear-shaped tooth (12) is formed on an outer peripheral portion of the positioning roller (11).
（ｈ）の内壁における円周方向の１８０度離れた位置
に、外周部を対向させた状態に配されていることを特徴
とする請求項２または３記載の絶縁電線の欠陥検出装
置。4. The positioning roller (11) is disposed at a position 180 degrees apart in the circumferential direction on the inner wall of the electric wire insertion hole (h) with its outer peripheral portion facing the outer peripheral portion. Item 3. The defect detecting device for an insulated wire according to item 2 or 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27492396A JP3720144B2 (en) | 1996-10-17 | 1996-10-17 | Insulated wire defect detection apparatus and defect detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27492396A JP3720144B2 (en) | 1996-10-17 | 1996-10-17 | Insulated wire defect detection apparatus and defect detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10123195A true JPH10123195A (en) | 1998-05-15 |
| JP3720144B2 JP3720144B2 (en) | 2005-11-24 |
Family
ID=17548434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27492396A Expired - Fee Related JP3720144B2 (en) | 1996-10-17 | 1996-10-17 | Insulated wire defect detection apparatus and defect detection method |
Country Status (1)
| Country | Link |
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| JP (1) | JP3720144B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478144A (en) * | 2017-07-27 | 2017-12-15 | 中国科学院高能物理研究所 | A kind of silk thread positioner and method based on quadrupole electromagnet and vibration line technology |
| CN110865282A (en) * | 2019-11-07 | 2020-03-06 | 云南电网有限责任公司临沧供电局 | Detection method of insulating tool for live-wire work |
-
1996
- 1996-10-17 JP JP27492396A patent/JP3720144B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478144A (en) * | 2017-07-27 | 2017-12-15 | 中国科学院高能物理研究所 | A kind of silk thread positioner and method based on quadrupole electromagnet and vibration line technology |
| CN110865282A (en) * | 2019-11-07 | 2020-03-06 | 云南电网有限责任公司临沧供电局 | Detection method of insulating tool for live-wire work |
| CN110865282B (en) * | 2019-11-07 | 2021-10-01 | 云南电网有限责任公司临沧供电局 | Detection method of insulating tool for live-wire work |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3720144B2 (en) | 2005-11-24 |
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