JP2008070301A - Method and device for detecting disconnection position of power supply cable - Google Patents

Method and device for detecting disconnection position of power supply cable Download PDF

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JP2008070301A
JP2008070301A JP2006250769A JP2006250769A JP2008070301A JP 2008070301 A JP2008070301 A JP 2008070301A JP 2006250769 A JP2006250769 A JP 2006250769A JP 2006250769 A JP2006250769 A JP 2006250769A JP 2008070301 A JP2008070301 A JP 2008070301A
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Mitsugi Minatoya
貢 湊屋
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a disconnection position detecting method and device of a power supply cable capable of detecting a disconnection part without moving a sensor along an electric wire with a relatively easy circuit. <P>SOLUTION: In the disconnection position detecting method and device of a double-core electric wire where two insulated conducting wires are adjacently arranged, the electric capacitance value between two conducting wires is measured from one end of each conducting wire included in the electric wire, the electric capacitance value between two conducting wires is measured from the other end of each conducting wire, and the disconnection part is calculated using the ratio between the electric capacitance values measured from both ends as the ratio of the length of the disconnection part to the overall length of the double-core electric wire of each side. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、電源ケーブルの断線位置を検出する方法及びそれに用いる装置に関する。   The present invention relates to a method for detecting a disconnection position of a power cable and an apparatus used therefor.

電線の断線位置を検出する方法としては、ケーブルに沿ってセンサを移動させ、断線点を境に変化する電解強度を以って断線位置を検出する手法(例えば、下記特許文献1乃至特許文献3)が挙げられる、その際、断線したケーブルの一方端を接地すると共に、他方端に高周波電圧を印加する手法や、導電線の一端に基準交流電圧を印加すると共に、導電線の他端に基準交流電圧とは位相が180度ずれた反転交流電圧が印加する手法等、入力信号には種々の態様がある。   As a method for detecting the disconnection position of the electric wire, a method of detecting the disconnection position by moving the sensor along the cable and using the electrolytic strength that changes at the disconnection point (for example, Patent Document 1 to Patent Document 3 below). In this case, one end of the disconnected cable is grounded, a high-frequency voltage is applied to the other end, a reference AC voltage is applied to one end of the conductive wire, and a reference is applied to the other end of the conductive wire. There are various aspects of the input signal, such as a method in which an inverted AC voltage whose phase is shifted by 180 degrees from the AC voltage is applied.

その他、電線にパルス信号を印加し、そのとき電線に流れる電流を計測し、その電流波形を参照用の電流波形と比較し、計測した電流波形の立ち上がり時点と、波形差が生じた時点との時間間隔に基づき、電流計測箇所から断線箇所までの距離を求めて断線箇所を特定する手法(例えば下記特許文献4)が存在する。   In addition, when a pulse signal is applied to the wire, the current flowing in the wire is measured, the current waveform is compared with the reference current waveform, and the measured current waveform rise time and the time when the waveform difference occurs Based on the time interval, there is a technique (for example, Patent Document 4 below) for determining the distance from the current measurement location to the location where the disconnection occurs.

特開平6−66872号公報Japanese Patent Laid-Open No. 6-66872 特開平9−292432号公報Japanese Patent Laid-Open No. 9-292432 特開平11−44728号公報Japanese Patent Laid-Open No. 11-44728 特開2006−23105号公報JP 2006-23105 A

上記断線検出手法は、いずれも、実用に適した長さを確保されている家電製品の電線や、種々の電気器具等に離れた箇所から電源を供給すべく用いられる延長ケーブル等の断線箇所を検出する手法であるが、前記特許文献1乃至特許文献3に記載の手法は、いずれもその延長ケーブルに沿ってセンサを動かす煩雑な作業が伴い。特許文献4に記載の手法にあっては、パルス信号を発生する回路、及び時間間隔を検出する回路が必要となる。   Any of the above disconnection detection methods can be used to detect disconnection points such as electric wires of household electrical appliances that are secured for practical use and extension cables that are used to supply power from locations away from various electrical appliances. Although it is a method to detect, the methods described in Patent Document 1 to Patent Document 3 all involve complicated work of moving the sensor along the extension cable. In the method described in Patent Document 4, a circuit for generating a pulse signal and a circuit for detecting a time interval are required.

本発明は、上記実情に鑑みて為されたものであって、比較的容易な回路を以って電線に沿ってセンサを移動させることなく断線箇所を検出できる電源ケーブルの断線位置検出方法及び装置の提供を目的とする。   The present invention has been made in view of the above circumstances, and a disconnection position detection method and apparatus for a power cable capable of detecting a disconnection point without moving the sensor along the electric wire with a relatively easy circuit. The purpose is to provide.

上記課題を解決する為になされた本発明による二芯電線の断線位置検出方法は、相絶縁された二本の導線を隣接して配してなる二芯電線の断線位置検出方法であって、当該電線が内包する各導線の一端から前記二本の導線間の電気容量値を計測すると共に、各導線の他端から当該二本の導線間の電気容量値を計測し、両端から計測した電気容量値の比を、断線箇所を境とする各側の二芯電線の全長に対する長さの比として前記断線箇所を算出する事を特徴とする。   The disconnection position detection method for a two-core electric wire according to the present invention made to solve the above-mentioned problem is a disconnection position detection method for a two-core electric wire in which two insulated wires are adjacently arranged, The electrical capacitance value between the two conductors is measured from one end of each conductor contained in the electric wire, the electrical capacitance value between the two conductors is measured from the other end of each conductor, The disconnection location is calculated by using the ratio of the capacitance values as the ratio of the length to the total length of the two-core electric wires on each side with the disconnection location as a boundary.

本発明による三芯電線の断線位置検出方法は、相絶縁された三本の導線を正三角形状に隣接して配してなる三芯電線の断線位置検出方法であって、当該電線が内包する各導線の一端から、三本の導線のなかから一対の導線を選択してなる異なった三種の導線対間の電気容量値をそれぞれ計測すると共に、前記三種の導線対間について計測した電気容量値の最大値と最小値との比を、前記一端から断線箇所に至る長さの三芯電線の全長に対する比として前記断線箇所を算出する事を特徴とする。   The disconnection position detecting method for a three-core electric wire according to the present invention is a method for detecting a disconnection position of a three-core electric wire in which three insulated wires are arranged adjacent to each other in an equilateral triangle shape, and the electric wire includes From each end of each conducting wire, the electrical capacitance value measured between the three types of conducting wire pairs is measured while measuring the electrical capacitance value between three different conducting wire pairs obtained by selecting a pair of conducting wires from among the three conducting wires. The ratio of the maximum value and the minimum value is calculated as the ratio of the length from the one end to the disconnection location with respect to the total length of the three-core electric wire, and the disconnection location is calculated.

上記課題を解決する為になされた本発明による二芯電線の断線位置検出装置は、相絶縁された二本の導線を隣接して配してなる二芯電線の断線位置検出装置であって、当該電線が内包する各導線の両端へ接続するセンサプローブと、これらのセンサプローブを経て検出した電気容量成分を含む様にCRマルチバイブレータが構成された発振部と、当該発振部の出力から前記二本の導線間の電気容量値を算出する電気容量値算出部と、当該電線の両端から検出した前記二本の導線間の電気容量値の比を算出し出力する境界比率算出部とを具備する事を特徴とする。   The disconnection position detection device for a two-core electric wire according to the present invention made to solve the above-mentioned problem is a disconnection position detection device for a two-core electric wire in which two insulated wires are adjacently arranged, A sensor probe connected to both ends of each conducting wire included in the electric wire, an oscillating unit in which a CR multivibrator is configured to include an electric capacitance component detected through these sensor probes, and an output of the oscillating unit from the two An electric capacity value calculating unit for calculating an electric capacity value between the two conductive wires, and a boundary ratio calculating unit for calculating and outputting a ratio of the electric capacity values between the two electric wires detected from both ends of the electric wire. It is characterized by things.

本発明による三芯電線の断線位置検出装置は、相絶縁された三本の導線を正三角形状に隣接して配してなる三芯電線の断線位置検出装置であって、当該電線が内包する三本の導線のなかから一対の導線を選択してなる異なった三種の各導線対の一端へ接続するセンサプローブと、これらのセンサプローブを経て検出した電気容量成分を含む様にCRマルチバイブレータが構成された発振部と、当該発振部の出力から前記三種の導線対間の電気容量値を算出する電気容量値算出部と、前記三種の導線対間について計測した電気容量値の最大値と最小値との比を算出し出力する境界比率算出部とを具備する事を特徴とする。   The disconnection position detecting device for a three-core electric wire according to the present invention is a disconnection position detecting device for a three-core electric wire in which three phase-insulated conductors are arranged adjacent to each other in an equilateral triangle shape. The CR multivibrator includes a sensor probe connected to one end of each of three different types of conductor pairs selected from a pair of conductors among the three conductors, and a capacitance component detected through these sensor probes. A configured oscillating unit; an electric capacitance value calculating unit that calculates an electric capacitance value between the three types of conductor pairs from an output of the oscillating unit; and a maximum value and a minimum electric capacitance value measured between the three types of electric wire pairs. And a boundary ratio calculating unit that calculates and outputs a ratio to the value.

本発明による電線の断線位置検出方法によれば、電線の端、例えば、コンセントやプラグの端子、又は未処理の始終端部にプローブを接続し比較的容易な回路を以って電線に沿ってセンサを移動させることなく断線箇所を検出できる。そして、その装置にあっても、比較的小規模で低コストなものとできる。   According to the method for detecting a break position of an electric wire according to the present invention, a probe is connected to the end of the electric wire, for example, a terminal of an outlet or a plug, or an unprocessed start / end portion, along a wire with a relatively easy circuit. The disconnection location can be detected without moving the sensor. And even if it is in the apparatus, it can be made comparatively small and low-cost.

以下、本発明による電線の断線位置検出方法の実施の形態を、それに用いる電線の断線位置検出装置(以下、位置検出装置と記す。)の実施の形態と共に、図面に基づき詳細に説明する。   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an electric wire break position detection method according to the present invention will be described below in detail with reference to the drawings together with an embodiment of an electric wire break position detection apparatus (hereinafter referred to as a position detection apparatus) used therefor.

図1に示す位置検出装置は、相絶縁された二本の導線1,1を隣接して配してなる二芯電線2の断線位置検出装置(第一の実施の形態)であって、当該電線2が内包する各導線1,1の両端に接続するセンサプローブ3と、これらのセンサプローブ3を経て検出した電気容量成分を含む様にCRマルチバイブレータ4が構成された発振部5と、当該発振部5の出力から前記二本の導線1,1間の電気容量値を算出する電気容量値算出部6と、当該電線2の両端から検出した前記二本の導線1,1間の電気容量値の比を算出し出力する境界比率算出部7とを具備するものである。   The position detection device shown in FIG. 1 is a disconnection position detection device (first embodiment) for a two-core electric wire 2 in which two insulated wires 1 and 1 are arranged adjacent to each other. A sensor probe 3 connected to both ends of each of the conducting wires 1 and 1 included in the electric wire 2; an oscillating unit 5 in which a CR multivibrator 4 is configured so as to include a capacitance component detected through the sensor probe 3; An electric capacitance value calculation unit 6 that calculates an electric capacitance value between the two conductors 1 and 1 from the output of the oscillation unit 5, and an electric capacitance between the two conductors 1 and 1 detected from both ends of the electric wire 2. A boundary ratio calculation unit 7 that calculates and outputs a ratio of values is provided.

当該例における前記センサプローブ3は、断線の検出対象である電線(以下、被検電線2と記す。)の各々の端から電気容量値を検出すべく各端について一対ずつ設けられている(各方の一対が一まとめとされ、先端部で二股に分かれた形態でも良い。)。各センサプローブ3には、当該電線2が内包する導線1の端と電気的に接続する為の電極8が設けられている。当該電極8は、前記被検電線2が内包する各導線1,1の両端、或いは挟持機能を有するコンセントの端子へ差し入れる針形状(図1及び図2参照)や、プラグの突出した端子を掴むクリップ形状(所謂ワニ口クリップやU字状のフック部が導線を挟持する形態のクリップ等の形状)、又はそれらを兼ね備えた形状で設けられる。   The sensor probe 3 in this example is provided in pairs for each end so as to detect an electric capacitance value from each end of an electric wire (hereinafter, referred to as a test electric wire 2) which is a detection target of disconnection (each It is also possible to adopt a form in which a pair of the two are grouped together and divided into two forks at the tip. Each sensor probe 3 is provided with an electrode 8 for electrical connection with the end of the conducting wire 1 included in the electric wire 2. The electrode 8 includes a needle shape (see FIGS. 1 and 2) inserted into both ends of each of the conductive wires 1 and 1 included in the test electric wire 2 or a terminal of a receptacle having a clamping function, or a terminal protruding from a plug. It is provided in a clip shape (a shape such as a so-called crocodile clip or a clip in a form in which a U-shaped hook portion sandwiches a conductive wire) or a shape that combines them.

前記発振部5を構成するCRマルチバイブレータ4は、被検電線2を構成する二本の導線1,1間の電気容量成分を、当該回路の時定数を決定するコンデンサとして含み(図1(B)及び図2(B)のコンデンサのシンボル参照)方形波を出力するものである。回路構成は被検電線2の仕様に応じて適宜設計すればよいが、実用上は、約50cmから数十m程度の範囲の長さを有する被検電線2が包含する二本の導線1,1間の全長に亘る電気容量成分において、約5cmから50cm程度の断線位置の変化がその電気容量成分の変化に対する出力周波数の変化を以って検出できる時定数を選択する事が望ましい。   The CR multivibrator 4 constituting the oscillating unit 5 includes a capacitance component between the two conductors 1 and 1 constituting the test wire 2 as a capacitor for determining the time constant of the circuit (FIG. 1 (B ) And the symbol of the capacitor in FIG. 2B) to output a square wave. The circuit configuration may be appropriately designed according to the specifications of the test electric wire 2, but in practice, the two conductors 1 included in the test electric wire 2 having a length in the range of about 50 cm to several tens of meters. It is desirable to select a time constant that can detect a change in the disconnection position of about 5 cm to about 50 cm with a change in the output frequency with respect to the change in the capacitance component in the capacitance component over the entire length of 1.

前記電気容量値算出部6は、前記発振部5から出力された単位時間当たりの波数をカウントし周波数f又は周期Tを導くものである。CRマルチバイブレータ4においては、その中にコンデンサとして含む電気容量成分はその発振周期Tに比例することから、導いた周期Tを電気容量成分と等価の値たる前記電気容量値と視ることができる。   The electric capacity value calculation unit 6 counts the number of waves per unit time output from the oscillation unit 5 and derives the frequency f or the period T. In the CR multivibrator 4, the capacitance component included therein as a capacitor is proportional to the oscillation period T. Therefore, the derived cycle T can be regarded as the capacitance value equivalent to the capacitance component. .

前記境界比率算出部7は、前記被検電線2の各々の端から電気容量値を検出すべく各端について一対ずつ設けられている各センサプローブ3を経て得られた当該被検電線2の各端からの電気容量値の比を出力するものである。被検電線2の長さが既知の場合には、当該長さを入力することにより、得られた比を乗じて一方の端から断線位置までの長さを算出する構成とすることも出来る。   The boundary ratio calculation unit 7 is configured so that each of the test electric wires 2 obtained through the sensor probes 3 provided in pairs for each end in order to detect the capacitance value from each end of the electric test wire 2. The ratio of the electric capacity value from the end is output. When the length of the test electric wire 2 is known, the length from one end to the disconnection position can be calculated by inputting the length and multiplying the obtained ratio.

当該例にあっては、前記センサプローブ3は被検電線2の各端に対して一対ずつ設けられており、各対をなすセンサプローブ3(センサプローブ対)について各々CRマルチバイブレータ4を具備しているが、前記センサプローブを一対のみ設け、各端について電気容量値を順次計測し、先後計測において得られた電気容量値を保持する記憶部9を設け、当該記憶部9に記録された電気容量値の比を出力する構成としても良い。また、センサプローブ3を二対設ける場合にあっても、各センサプローブ対について各々CRマルチバイブレータ4を備えずに単一のCRマルチバイブレータで構成し、当該CRマルチバイブレータの電気容量成分接続用端子に接続するセンサプローブ3をセンサプローブ対毎にスイッチで切り替える手法を採っても良い。   In this example, a pair of the sensor probes 3 is provided for each end of the electric wire 2 to be tested, and each pair of sensor probes 3 (sensor probe pairs) includes a CR multivibrator 4. However, only one pair of the sensor probes is provided, the capacitance value is sequentially measured at each end, and the storage unit 9 that holds the capacitance value obtained in the previous and subsequent measurement is provided, and the electric recording recorded in the storage unit 9 is provided. A configuration that outputs a ratio of capacitance values is also possible. Further, even when two pairs of sensor probes 3 are provided, each sensor probe pair is configured by a single CR multivibrator without the CR multivibrator 4, and a terminal for connecting capacitance components of the CR multivibrator. A method may be adopted in which the sensor probe 3 connected to is switched by a switch for each sensor probe pair.

上記構成を有する位置検出装置によれば、当該被検電線2が内包する各導線1,1の一端から前記二本の導線1,1間の電気容量値を計測すると共に、各導線1,1の他端から当該二本の導線1,1間の電気容量値を計測し、両端から計測した電気容量値の比を、断線箇所を境とする各側の二芯電線(被検電線2)の全長に対する長さの比として前記断線箇所を算出する電線の断線位置検出方法を実施できることとなる。   According to the position detection apparatus having the above-described configuration, the electrical capacitance value between the two conductors 1 and 1 is measured from one end of each conductor 1 and 1 included in the test electric wire 2 and each conductor 1 and 1 is measured. The electrical capacitance value between the two conducting wires 1 and 1 is measured from the other end of the wire, and the ratio of the electrical capacitance values measured from both ends is determined to be a two-core electric wire on each side with the broken wire as the boundary (test wire 2) Thus, it is possible to implement a method for detecting a broken position of an electric wire by calculating the broken portion as a ratio of the length to the total length of the wire.

図2に示す例は、相絶縁された三本の導線1,1,1を正三角形状に隣接して配し(隣接する導線との間隔が一定に配置)てなる三芯電線(被検電線2)の位置検出装置(第二の実施の形態)であって、当該被検電線2が内包する三本の導線1,1,1のなかから一対の導線1,1を選択してなる異なった三種の各導線対の一端へと電気的に接続する為の電極8を具備したセンサプローブ3と、これらのセンサプローブ3を経て検出した電気容量成分を含む様にCRマルチバイブレータ4が構成された発振部5と、当該発振部5の出力から前記三種の導線対間の電気容量を算出する電気容量値算出部6と、前記三種の導線対間について計測した電気容量値の最大値と最小値との比を算出し出力する境界比率算出部7とを具備するものである。   The example shown in FIG. 2 is a three-core electric wire (test object) formed by arranging three phase-insulated conductors 1, 1, 1 adjacent to each other in a regular triangle shape (constant spacing between adjacent conductors). A position detecting device (second embodiment) of the electric wire 2), wherein a pair of conducting wires 1, 1 are selected from among the three conducting wires 1, 1, 1 included in the electric wire 2 to be tested. A sensor probe 3 having an electrode 8 for electrical connection to one end of each of three different types of conducting wire pairs, and a CR multivibrator 4 is configured so as to include capacitance components detected through these sensor probes 3 The oscillating unit 5, the capacitance value calculating unit 6 that calculates the capacitance between the three types of conductor pairs from the output of the oscillating unit 5, and the maximum value of the capacitance value measured between the three types of conductor pairs A boundary ratio calculation unit 7 that calculates and outputs a ratio to the minimum value is provided.

当該例における前記センサプローブ3は、被検電線2の端から電気容量値を検出すべく二本又は三本設けられている(当該二本又は三本が一まとめとされ、先端部で二股又は三股に分かれた形態でも良い。)。各センサプローブ3には、当該被検電線2が内包する導線1の端と電気的に接続する為の電極8が設けられている。当該電極8は、前記第一の実施の形態と同様に、被検電線2が内包する各導線1,1,1の両端、或いは挟持機能を有するコンセントの端子へ差し入れる針形状や、プラグの突出した端子を掴むクリップ形状、又はそれらを兼ね備えた形状で設けられる。   In the example, two or three sensor probes 3 are provided to detect the capacitance value from the end of the electric wire 2 to be tested (the two or three are grouped together and bifurcated at the tip or It may be divided into three parts.) Each sensor probe 3 is provided with an electrode 8 for electrically connecting to the end of the conducting wire 1 included in the electric wire 2 to be tested. As in the first embodiment, the electrode 8 has a needle shape inserted into both ends of each of the conducting wires 1, 1, 1 contained in the electric wire 2 to be tested, or a terminal of an outlet having a clamping function, or a plug It is provided in the shape of a clip that holds the protruding terminal or a shape that combines them.

前記発振部5を構成するCRマルチバイブレータ4は、被検電線2を構成する三本の導線1,1,1からなる三種の各導線対の一端から得た電気容量成分を、当該回路の時定数を決定するコンデンサとして含み方形波を出力するものである。回路を構成する際の留意点は、先に記した第一の実施の形態におけるCRマルチバイブレータ4と同様であり、前記電気容量値算出部6の態様も先に記した第一の実施の形態における電気容量値算出部6と同様である。   The CR multivibrator 4 constituting the oscillating unit 5 uses the capacitance component obtained from one end of each of the three types of conductor pairs consisting of the three conductors 1, 1, 1 constituting the test electric wire 2 at the time of the circuit. A square wave is output as a capacitor for determining a constant. The points to be noted when configuring the circuit are the same as those of the CR multivibrator 4 in the first embodiment described above, and the aspect of the capacitance value calculation unit 6 is also described in the first embodiment. This is the same as the electric capacity value calculation unit 6 in FIG.

前記境界比率算出部7は、前記センサプローブ3が三本設けられている場合には、当該被検電線2を構成する三本の導線1,1,1からなる三種の各導線対の一端(計測の基準となる端。以下、計測端と記す。)から各センサプローブ3,3,3を経て得られた電気容量値を順次計測し、計測において得られた電気容量値を保持する記憶部9を設け、当該記憶部9に記録された電気容量値の大小を比較し、最大の電気容量値と最小の電気容量値との比を出力する構成を採るものである。被検電線2の長さが既知の場合には、当該長さを入力することにより、得られた比を乗じて計測端から断線位置までの長さを算出する構成とすることも出来る。   When the three sensor probes 3 are provided, the boundary ratio calculation unit 7 includes one end of each of three types of conductor pairs (three conductors 1, 1, 1) constituting the test electric wire 2 ( A storage unit that sequentially measures electric capacitance values obtained from each of the sensor probes 3, 3, and 3 from an end serving as a reference for measurement (hereinafter referred to as a measurement end) and holds the electric capacitance value obtained in the measurement. 9 is provided, the magnitudes of the capacitance values recorded in the storage unit 9 are compared, and the ratio between the maximum capacitance value and the minimum capacitance value is output. When the length of the electric wire 2 to be tested is known, the length from the measurement end to the disconnection position can be calculated by inputting the length and multiplying the obtained ratio.

当該例にあっては、前記センサプローブ3を三本備えると共に、当該センサプローブ3,3,3からなる三種のセンサプローブ対について各々CRマルチバイブレータ4が備えられているが、各導線対の電気容量成分を個別に測定する為のセンサプローブ3を二本のみ設ける構成とし、当該被検電線2を構成する三本の導線1,1,1からなる三種の各導線対の計測端から二本の前記センサプローブ3,3を経て得られた電気容量値を順次計測し、先後計測において得られた電気容量値を保持する記憶部9を設け、当該記憶部9に記録された電気容量値の大小を比較し、最大の電気容量値と最小の電気容量値との比を出力する構成を採っても良い。また、当該例の様にセンサプローブ3を三本設ける場合にあっても、当該センサプローブ3,3,3からなる三種のセンサプローブ対について各々CRマルチバイブレータ4を備えずに単一のCRマルチバイブレータで構成し、当該CRマルチバイブレータの電気容量成分接続用端子に接続するセンサプローブ3を、前記センサプローブ対毎にスイッチで切り替える手法を採っても良い。   In this example, three sensor probes 3 are provided, and a CR multivibrator 4 is provided for each of the three types of sensor probe pairs including the sensor probes 3, 3, 3. Only two sensor probes 3 for individually measuring the capacitance component are provided, and two from the measurement end of each of the three types of conductor pairs consisting of the three conductors 1, 1, 1 constituting the test electric wire 2. The capacitance values obtained through the sensor probes 3 and 3 are sequentially measured, and a storage unit 9 for holding the capacitance values obtained in the previous and subsequent measurements is provided, and the capacitance value recorded in the storage unit 9 is stored. A configuration may be adopted in which the size is compared and the ratio between the maximum electric capacity value and the minimum electric capacity value is output. Further, even when three sensor probes 3 are provided as in the example, each of the three types of sensor probe pairs consisting of the sensor probes 3, 3, 3 is not provided with a CR multivibrator 4, but a single CR multi A method may be adopted in which the sensor probe 3 configured by a vibrator and connected to the capacitance component connection terminal of the CR multivibrator is switched by a switch for each sensor probe pair.

上記構成を有する位置検出装置によれば、相絶縁された三本の導線を正三角形状に隣接して配してなる三芯電線2が内包する各導線1の一端より、三本の導線1,1,1のなかから一対の導線1,1を選択してなる異なった三種の導線対間の電気容量値をそれぞれ計測すると共に、前記三種の導線対間について計測した電気容量値の最大値と最小値との比を、前記一端から断線箇所に至る長さの三芯電線2の全長に対する比として前記断線箇所を算出する電線の断線位置検出方法を実施できることとなる。   According to the position detection device having the above-described configuration, the three conductors 1 are formed from one end of each conductor 1 including a three-core electric wire 2 formed by arranging three insulated wires adjacent to each other in an equilateral triangle shape. , 1, and 1 to select the pair of conductors 1 and 1, respectively, and measure the capacitance values between the three different types of conductor pairs, and the maximum value of the capacitance values measured between the three types of conductor pairs. And the minimum value as a ratio of the length from the one end to the broken portion with respect to the total length of the three-core electric wire 2, the method for detecting the broken position of the electric wire can be implemented.

例えば、市販のビニールキャプタイヤコードやゴムキャプタイヤコードにあっては、電線1mあたりの電気容量は約100pFから150pF程度である。これに類する仕様の二芯被検電線の断線位置を、前記第一の実施の形態を用いて検出した場合、一端から計測した前記二本の導線間の電気容量値が1000pFに相当する値であり、他端から計測した前記二本の導線間の電気容量値が4000pFに相当する値である場合は、それらの比であるところの前記一端から全長に対する比:20%の位置に断線が生じていると考えられる。   For example, in a commercially available vinyl captyre cord or rubber captyre cord, the electric capacity per 1 m of electric wire is about 100 pF to 150 pF. When the disconnection position of a two-core test electric wire with specifications similar to this is detected using the first embodiment, the capacitance value between the two conductors measured from one end is a value corresponding to 1000 pF. Yes, when the capacitance value between the two conductors measured from the other end is a value corresponding to 4000 pF, a disconnection occurs at a ratio of 20% to the total length from the one end, which is the ratio between them. It is thought that.

一方、これに類する仕様の三芯被検電線の断線位置を、前記第二の実施の形態を用いて検出した場合、第一の導線対間の電気容量値が5000pFに相当する値であり、第二の導線対間の電気容量値が1000pFに相当する値であり、第三の導線対間の電気容量値が1000pFに相当する値である場合は、それらの最大値に対する最小値の比であるところの計測端から全長に対する比:20%の位置に断線が生じていると考えられる。   On the other hand, when the disconnection position of the three-core test electric wire having a specification similar to this is detected using the second embodiment, the capacitance value between the first conductor pair is a value corresponding to 5000 pF, When the capacitance value between the second conductor pair is a value corresponding to 1000 pF and the capacitance value between the third conductor pair is a value corresponding to 1000 pF, the ratio of the minimum value to the maximum value is It is considered that a disconnection occurs at a position of 20% from a certain measurement end to the total length.

以上の如く、本発明による電源ケーブルの断線位置検出方法及び装置の存在は、長尺の電線を備える種々の電気機器の耐用期間を長期化し、また、作業現場における断線事故を比較的容易に復旧できることで機器の不備に起因する時間の無駄遣いも解消し効率的な操業の実現に寄与することとなる。   As described above, the existence of the method and apparatus for detecting the disconnection position of the power cable according to the present invention prolongs the service life of various electric devices having long electric wires and relatively easily restores the disconnection accident at the work site. By being able to do so, the waste of time due to inadequate equipment is also eliminated, contributing to the realization of efficient operation.

(A):本発明による電線の断線位置検出方法を用いる電線の一例を示す説明図、及び(B):本発明による電線の断線位置検出装置の第一の実施の形態を示すブロック図である。(A): It is explanatory drawing which shows an example of the electric wire which uses the disconnection position detection method of the electric wire by this invention, (B): It is a block diagram which shows 1st embodiment of the disconnection position detection apparatus of the electric wire by this invention. . (A):本発明による電線の断線位置検出方法を用いる電線の一例を示す説明図、及び(B):本発明による電線の断線位置検出装置の第二の実施の形態を示すブロック図である。(A): It is explanatory drawing which shows an example of the electric wire which uses the disconnection position detection method of the electric wire by this invention, (B): It is a block diagram which shows 2nd embodiment of the electric wire break position detection apparatus by this invention. .

符号の説明Explanation of symbols

1 導線,2 電線,3 センサプローブ,4 マルチバイブレータ,
5 発振部,6 電気容量値算出部,7 境界比率算出部,8 電極,9 記憶部,
1 lead wire, 2 electric wire, 3 sensor probe, 4 multivibrator,
5 Oscillator, 6 Electric capacitance value calculator, 7 Boundary ratio calculator, 8 Electrode, 9 Memory,

Claims (4)

相絶縁された二本の導線を隣接して配してなる二芯電線の断線位置検出方法であって、
当該電線が内包する各導線の一端から前記二本の導線間の電気容量値を計測すると共に、各導線の他端から当該二本の導線間の電気容量値を計測し、両端から計測した電気容量値の比を、断線箇所を境とする各側の二芯電線の全長に対する長さの比として前記断線箇所を算出する電線の断線位置検出方法。
A method for detecting a disconnection position of a two-core electric wire formed by arranging two phase-insulated conductors adjacent to each other,
The electrical capacitance value between the two conductors is measured from one end of each conductor contained in the electric wire, the electrical capacitance value between the two conductors is measured from the other end of each conductor, A method for detecting a disconnection position of an electric wire, wherein the ratio of the capacitance value is calculated as a ratio of the length to the total length of the two-core electric wire on each side with the disconnection portion as a boundary.
相絶縁された三本の導線を正三角形状に隣接して配してなる三芯電線の断線位置検出方法であって、
当該電線が内包する各導線の一端から、三本の導線のなかから一対の導線を選択してなる異なった三種の導線対間の電気容量値をそれぞれ計測すると共に、前記三種の導線対間について計測した電気容量値の最大値と最小値との比を、前記一端から断線箇所に至る長さの三芯電線の全長に対する比として前記断線箇所を算出する電線の断線位置検出方法。
A method for detecting a broken position of a three-core electric wire in which three insulated wires are arranged adjacent to each other in an equilateral triangle shape,
From one end of each conducting wire included in the electric wire, each of the electric capacitance values between three different types of conducting wire pairs selected from a pair of conducting wires among the three conducting wires is measured, and between the above three types of conducting wire pairs A wire breakage position detection method for calculating the breakage location as a ratio of the measured maximum value and minimum value of the capacitance value to a total length of a three-core electric wire having a length from the one end to the breakage location.
相絶縁された二本の導線を隣接して配してなる二芯電線の断線位置検出装置であって、
当該電線が内包する各導線の両端へ接続するセンサプローブと、これらのセンサプローブを経て検出した電気容量成分を含む様にCRマルチバイブレータが構成された発振部と、当該発振部の出力から前記二本の導線間の電気容量値を算出する電気容量値算出部と、当該電線の両端から検出した前記二本の導線間の電気容量値の比を算出し出力する境界比率算出部とを具備する電線の断線位置検出装置。
A disconnection position detecting device for a two-core electric wire in which two conductors that are phase-insulated are arranged adjacent to each other,
A sensor probe connected to both ends of each conducting wire included in the electric wire, an oscillating unit in which a CR multivibrator is configured to include an electric capacitance component detected through these sensor probes, and an output of the oscillating unit from the two An electric capacity value calculating unit for calculating an electric capacity value between the two conductive wires, and a boundary ratio calculating unit for calculating and outputting a ratio of the electric capacity values between the two electric wires detected from both ends of the electric wire. Wire breakage position detection device.
相絶縁された三本の導線を正三角形状に隣接して配してなる三芯電線の断線位置検出装置であって、
当該電線が内包する三本の導線のなかから一対の導線を選択してなる異なった三種の各導線対の一端へ接続するセンサプローブと、これらのセンサプローブを経て検出した電気容量成分を含む様にCRマルチバイブレータが構成された発振部と、当該発振部の出力から前記三種の導線対間の電気容量値を算出する電気容量値算出部と、前記三種の導線対間について計測した電気容量値の最大値と最小値との比を算出し出力する境界比率算出部とを具備する電線の断線位置検出装置。
A disconnection position detecting device for a three-core electric wire in which three conductors insulated in phase are arranged adjacent to each other in a regular triangle shape,
A sensor probe that is connected to one end of each of three different pairs of conductors obtained by selecting a pair of conductors from the three conductors included in the wire, and a capacitance component detected through these sensor probes is included. An oscillation unit in which a CR multivibrator is configured, an electric capacitance value calculation unit that calculates an electric capacitance value between the three types of conductor pairs from the output of the oscillation unit, and an electric capacitance value measured between the three types of conductor pairs An apparatus for detecting a breakage position of an electric wire, comprising: a boundary ratio calculation unit that calculates and outputs a ratio between a maximum value and a minimum value.
JP2006250769A 2006-09-15 2006-09-15 Method and apparatus for detecting disconnection position of power cable Expired - Fee Related JP4500294B2 (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5380583A (en) * 1976-12-25 1978-07-17 Sumitomo Electric Ind Ltd Disconnection detective method for shielded cable

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5380583A (en) * 1976-12-25 1978-07-17 Sumitomo Electric Ind Ltd Disconnection detective method for shielded cable

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