JPH0571928A - Method and device for diagnosing deterioration of overhead wire - Google Patents

Method and device for diagnosing deterioration of overhead wire

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Publication number
JPH0571928A
JPH0571928A JP25832891A JP25832891A JPH0571928A JP H0571928 A JPH0571928 A JP H0571928A JP 25832891 A JP25832891 A JP 25832891A JP 25832891 A JP25832891 A JP 25832891A JP H0571928 A JPH0571928 A JP H0571928A
Authority
JP
Japan
Prior art keywords
deterioration
image
overhead wire
overhead line
overhead
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.)
Pending
Application number
JP25832891A
Other languages
Japanese (ja)
Inventor
Kenichi Sofue
健一 祖父江
Hirotaka Yoshida
吉田　　浩隆
Katsuhiko Honjo
克彦 本庄
Junichi Masuda
順一 増田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP25832891A priority Critical patent/JPH0571928A/en
Publication of JPH0571928A publication Critical patent/JPH0571928A/en
Pending legal-status Critical Current

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  • Length Measuring Devices By Optical Means (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

PURPOSE:To obtain a method and device for diagnosing an amount of deterioration at a part of an overhead wire deteriorated without any contact. CONSTITUTION:A method for diagnosing deterioration of an overhead wire obtains an image of a part of an overhead wire 1 ' deteriorated without any contact and then compares an amount of reduction in a diameter of the overhead wire and a color tone of the image of the overhead wire with a wire diameter and the color tone value of the overhead wire when it is new and then determines an amount of deterioration of the overhead wire for determining the amount of deterioration of the overhead wire 1. A device for diagnosing deterioration of the overhead wire consists of an image pick-up machine 6 which automatically measures a distance to the overhead wire 1 and then inputs an image of the overhead wire 1, an expansion and contraction rod 7 which supports the image pick-up machine 6, an expansion and contraction control part 10, a drive part 11 which drives the image pick-up machine 6 in parallel, a part 13 for judging the amount of deterioration which judges the amount of reduction in the diameter of the overhead wire according to image information which is obtained from the image pick-up machine 6 and the amount of deterioration of the overhead wire 1 according to the color tone, and a power-supply part 8 which supplies power to each part.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、架空線の劣化をその構
成にかかわらず、地上から非破壊、非接触で診断する方
法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 for diagnosing the deterioration of an overhead line from the ground in a non-destructive and non-contact manner regardless of its structure.

【０００２】[0002]

【従来の技術】従来、架空線の劣化診断方法としては、
電柱、鉄塔等に昇柱し、または、梯子、高所作業車等を
使用して目視により劣化状況を診断する方法がある。図
５に目視点検法による診断例を示す。一方、架空線に近
接されたコイルに電流を流し、架空線に発生する渦電流
が、架空線の発錆状況により異なることを利用して劣化
状況を判定する電磁誘導法による診断法がある（特開昭
５９−２２２７５５）。図２に電磁誘導法による診断例
を示す。2. Description of the Related Art Conventionally, as a method of diagnosing the deterioration of overhead lines,
There is a method of diagnosing the deterioration situation by visually ascending to a utility pole, a steel tower, etc., or by using a ladder, a work platform, etc. FIG. 5 shows an example of diagnosis by the visual inspection method. On the other hand, there is a diagnostic method by an electromagnetic induction method that determines the deterioration status by utilizing the fact that the eddy current generated in the overhead wire is different depending on the rusting status of the overhead wire by passing a current through a coil close to the overhead wire ( JP-A-59-222755). FIG. 2 shows an example of diagnosis by the electromagnetic induction method.

【０００３】[0003]

【発明が解決しようとする課題】目視による方法は、診
断のため点検者に危険な高所作業が伴うこと、劣化度合
いの判断が点検者の経験によるところが多く、劣化度判
定にばらつきがでる等の問題があった。電磁誘導法は、
非接触測定であっても地上から、あるいは、遠隔からの
測定が難しく、さらに、発錆のない非金属材料への応用
が不可能であるという欠点があった。また、この手法で
は、発錆（腐食物）量と線径の減少量の両方を測定する
ことは困難であった。加えて被測定体の架空線の中間に
金物等が取付けられている場合は、その部分の診断が困
難であるという欠点があった。本発明は、架空線の劣化
程度を地上からの測定で、架空線の構成の如何にかかわ
らず非接触で定量的に測定する方法と装置を得るにあ
る。The visual method involves a dangerous work at a high place for the inspector for diagnosis, and the degree of deterioration is often determined by the inspector's experience, so that the degree of deterioration varies. There was a problem. The electromagnetic induction method
Even with non-contact measurement, it is difficult to measure from the ground or from a distance, and further, there is a drawback that it cannot be applied to non-metallic materials without rusting. Moreover, it is difficult to measure both the amount of rust (corrosion) and the decrease in wire diameter with this method. In addition, when a metal object or the like is attached in the middle of the overhead wire of the object to be measured, there is a drawback that it is difficult to diagnose that part. The present invention is to obtain a method and an apparatus for quantitatively measuring the degree of deterioration of an overhead line from the ground and without contact regardless of the configuration of the overhead line.

【０００４】[0004]

【課題を解決するための手段】本発明の架空線劣化診断
方法は、架空線に非接触で、かつ遠隔からの測定によっ
て架空線画像を得、前記架空線画像を基にし、新品時の
線径並びに色調値と比較し、架空線径の減肉量及び架空
線画像の色調（明度、色相、彩度）によって、架空線の
腐食あるいは環境劣化による架空線の劣化度を、定量化
するにあり、The method for diagnosing overhead wire deterioration according to the present invention provides an overhead wire image obtained by remote measurement without contacting the overhead wire, and based on the overhead wire image, a new line To quantify the degree of deterioration of the overhead line due to corrosion of the overhead line or environmental degradation by comparing the diameter and the color tone value and the amount of thinning of the overhead line diameter and the color tone (lightness, hue, saturation) of the overhead line image. Yes,

【０００５】その装置は、架空線までの距離を自動的に
測定するとともに、架空線の画像を入力する撮像機と、
前記撮像機を地上より接近させる伸縮棹と、前記伸縮棹
を所定の位置まで伸縮させる伸縮制御部と、前記撮像機
を架空線に平行して移動させる測定機駆動部と、前記撮
像機から得た画像情報から架空線径の減少量及び色調か
ら架空線の劣化度を判定する劣化判定部と、各部に電力
を供給する電源部からなる。The device automatically measures the distance to the overhead line, and an image pickup device for inputting an image of the overhead line,
Obtained from the image pickup device, a telescopic rod that brings the image pickup device closer to the ground, a telescopic control unit that extends and contracts the telescopic rod to a predetermined position, a measuring device driving unit that moves the image pickup device in parallel to an overhead line, and the image pickup device. A deterioration determination unit that determines the degree of deterioration of the overhead wire from the reduction amount of the overhead wire diameter and the color tone from the image information, and a power supply unit that supplies power to each unit.

【０００６】[0006]

【作用】本発明の方法は架空線を非接触で劣化程度を定
量的に測定でき、架空線の下部で作業でき、高温物体、
高所物体、危険性へ高い場所の測定が可能となる。The method of the present invention enables non-contact measurement of the degree of deterioration of an overhead line, work under the overhead line,
It is possible to measure high objects and places with high risk.

【０００７】[0007]

【実施例】図１は、本発明による劣化診断装置の構成図
である。この図において符号１は被検査体となる架空
線、６は撮像機、７は伸縮棹、８は電源部である。９は
劣化判定部 であり、伸縮棹７を制御する１０の伸縮制
御部と、架空線に平行して撮像機６を移動させる１１の
駆動部、駆動部制御のための１２の駆動制御卓、及び撮
像機６から得た画像信号を基に架空線の劣化程度を判定
する１３の劣化判定部から構成される。1 is a block diagram of a deterioration diagnosis apparatus according to the present invention. In this figure, reference numeral 1 is an overhead wire which is an object to be inspected, 6 is an image pickup device, 7 is a telescopic rod, and 8 is a power supply unit. Reference numeral 9 denotes a deterioration determination unit, 10 expansion / contraction control units for controlling the expansion / contraction rod 7, 11 drive units for moving the image pickup device 6 in parallel with the overhead line, 12 drive control consoles for controlling the drive units, And 13 deterioration determination units that determine the degree of deterioration of the overhead line based on the image signal obtained from the image pickup device 6.

【０００８】次に、これら各構成の作用について説明す
る。撮像機６には、自動的に焦点を定めるオート・フォ
ーカス機能が装備されており、架空線までの距離を測定
することができる。また、輝度の基準値を基に架空線像
と背景像の輝度を一定の画像品質に調整することができ
る。これらの調整の後、撮像機６で検知した架空線の画
像信号は、電気信号に変換されて劣化判定部１３に送ら
れる。劣化判定部１３では、得られた画像信号から、架
空線径及び架空線の色調を算出して劣化程度を判定す
る。これら一連の劣化診断の過程は、駆動制御卓１２の
操作により撮像機６を架空線１と平行に移動すること
で、繰り返し実施できる。なお、電源部８は、各装置部
に電力を供給する。Next, the operation of each of these components will be described. The image pickup device 6 is equipped with an auto focus function for automatically focusing, and can measure the distance to the overhead line. Further, the brightness of the overhead line image and the background image can be adjusted to a constant image quality based on the brightness reference value. After these adjustments, the image signal of the overhead line detected by the imaging device 6 is converted into an electric signal and sent to the deterioration determination unit 13. The deterioration determination unit 13 calculates the diameter of the overhead wire and the color tone of the overhead wire from the obtained image signal to determine the degree of deterioration. These series of deterioration diagnosis processes can be repeatedly performed by operating the drive control console 12 to move the image pickup device 6 in parallel with the overhead line 1. The power supply unit 8 supplies power to each device unit.

【０００９】次に、劣化判定部１３の内部構成を示す。
図２は、劣化判定部１３の構成図である。１４は画像入
力信号、１５は距離入力信号、１６は明度調整部、１７
は明度基準データ、１８は画像調整部、１９は架空線の
線径測定部、２０は架空線の色調測定部、２１は劣化度
基準ＤＢ、２２は架空線の劣化度判定部、２３は劣化度
記録部、２４は結果の表示部、２５は架空線の入力画像
モニタ及び２６は画像記録部である。Next, the internal structure of the deterioration determination unit 13 will be shown.
FIG. 2 is a configuration diagram of the deterioration determination unit 13. Reference numeral 14 is an image input signal, 15 is a distance input signal, 16 is a brightness adjusting section, 17
Is lightness reference data, 18 is an image adjusting unit, 19 is an overhead wire diameter measuring unit, 20 is an overhead wire color tone measuring unit, 21 is a deterioration degree reference DB, 22 is an overhead wire deterioration degree determining unit, and 23 is deterioration. A degree recording unit, 24 is a result display unit, 25 is an overhead line input image monitor, and 26 is an image recording unit.

【００１０】次に、これら劣化判定部１３の各構成の作
用について説明する。撮像機６から得た画像信号は、明
度基準データ１７を基に明度調整部１６で、架空線像の
明度を基準化する。画像調整部１８では、架空線像と背
景像の分離を行い、両方の明度差分を取って架空線像の
明度の基準化を行う。さらに、撮像機６で得た１被検体
（架空線）までの距離（Ｈ）を基に架空線像の大きさを
基準化して、等スケールの画像として画像モニタ２５に
映す。また、この画像は画像記録部２６にメモリでき
る。続いて、線径測定部１９では、基準化された架空線
画像から線径（Ｄ）を測定する。色調測定部２０では、
架空線画像の色調を測定する。劣化度判定部２２では、
劣化度基準化ＤＢ２１で予めデータ化されている新品架
空線線径値及び架空線劣化度別色調の範囲を基に、架空
線の劣化度を判定する。得られた診断結果は、劣化度記
録部２３にメモリされ、表示部２４に出力される。Next, the operation of each component of the deterioration determining unit 13 will be described. The image signal obtained from the image pickup device 6 is standardized in the brightness of the overhead line image by the brightness adjusting unit 16 based on the brightness reference data 17. The image adjusting unit 18 separates the aerial line image and the background image, and takes the difference in brightness between the two to standardize the brightness of the aerial line image. Further, the size of the overhead line image is standardized on the basis of the distance (H) to one subject (overhead line) obtained by the image pickup device 6, and is displayed on the image monitor 25 as an image of equal scale. Further, this image can be stored in the image recording unit 26. Then, the wire diameter measuring unit 19 measures the wire diameter (D) from the standardized overhead wire image. In the color tone measuring unit 20,
Measure the color tone of the overhead line image. In the deterioration degree determination unit 22,
The deterioration degree of the overhead wire is determined based on the value of the diameter of the new overhead wire and the range of the color tone according to the deterioration degree of the overhead wire, which is preliminarily converted into data in the deterioration standardization DB 21. The obtained diagnosis result is stored in the deterioration degree recording unit 23 and output to the display unit 24.

【００１１】図３に、これらの架空線劣化診断の動作フ
ローを示す。まず、被検査架空線の新品時の線径値並び
に色調を劣化判定基準ＤＢ２１に記録させておく。伸縮
棹７の制御によって撮像機６を架空線１に接近させ、架
空線１の画像を捉える。この時、撮像機６では架空線１
に焦点を調整している（１００）。まず、ステップ１０
０で得た焦点調整によって撮像機６と架空線１の距離
（Ｈ）を測定する（１１０）。これに並行して、架空線
１を撮像して、画像を電気信号に変換する（１２０）。
次に、被検査体である架空線からの光量、輝度等をフィ
ルタ化して一定の明度となるよう明度調整を行う（１３
０）。次に架空線像とその背景画像を明度差によって分
離し、距離（Ｈ）を基に画面上に一定寸法の架空線像に
縮小あるいは拡大して画面寸法の規格化を行う（１４
０）。また、この段階で、撮像画像のモニタと、必要に
より画像の記録が可能である。FIG. 3 shows an operation flow of these overhead line deterioration diagnosis. First, the wire diameter value and color tone of a new overhead wire to be inspected are recorded in the deterioration determination reference DB 21. The image pickup device 6 is brought close to the overhead line 1 by the control of the expansion / contraction rod 7, and an image of the overhead line 1 is captured. At this time, in the image pickup device 6, the overhead line 1
The focus is adjusted to (100). First, step 10
The distance (H) between the imaging device 6 and the overhead line 1 is measured by the focus adjustment obtained at 0 (110). In parallel with this, the overhead line 1 is imaged and the image is converted into an electric signal (120).
Next, the amount of light from the overhead line, which is the object to be inspected, the brightness, etc. are filtered to adjust the brightness so that the brightness is constant (13).
0). Next, the aerial line image and its background image are separated by the difference in lightness, and the aerial line image of a certain size is reduced or enlarged on the screen based on the distance (H) to standardize the screen size (14).
0). At this stage, it is possible to monitor the captured image and record the image if necessary.

【００１２】画像処理された信号は、線径測定部１９と
色相測定部２０に並行して送られる。線径測定では、ス
テップ１４０で処理された画像信号から、被検査体架空
線の直径（Ｄ）を測定し、予め入力した被架空線の新品
時直径と比較し、その減少割合を演算する（１５０）。
色相測定では、ステップ１４０で処理された画像信号か
ら、被検査体架空線の色調を測定し、新品時の基準化さ
れた色調値を基に相対色調値を演算する（１６０）。最
後に、測定した線径減少量及び相対色調値の組み合わせ
によって、被検査体架空線の劣化度を演算判定する（１
７０）。The image-processed signal is sent to the wire diameter measuring unit 19 and the hue measuring unit 20 in parallel. In the wire diameter measurement, the diameter (D) of the overhead wire of the object to be inspected is measured from the image signal processed in step 140, and it is compared with the pre-input diameter of the overhead wire at the time of new article, and the reduction ratio is calculated ( 150).
In the hue measurement, the color tone of the overhead wire of the object to be inspected is measured from the image signal processed in step 140, and the relative color tone value is calculated based on the standardized color tone value of a new product (160). Finally, the degree of deterioration of the overhead wire to be inspected is calculated and determined based on the combination of the measured wire diameter reduction amount and the relative color tone value (1
70).

【００１３】判定結果は、劣化度記録部２３において記
録され、また、必要により印刷出力される。図４に、亜
鉛メッキ鋼撚線の劣化度判定の例を示す。縦軸に線径減
少量、横軸に相対色調値として相対色相値のみを採用し
た場合を示す。劣化度は、線径減少量のみによらず、相
対色相値が小さくなるに従って増加する。この場合、劣
化度がＡからＤに進むに従って劣化度は増大し、Ｄでは
取替が必要と判定する。The judgment result is recorded in the deterioration degree recording section 23, and is printed out if necessary. FIG. 4 shows an example of determining the degree of deterioration of a galvanized steel stranded wire. The vertical axis shows the case where the wire diameter reduction amount is used, and the horizontal axis shows only the relative hue value as the relative tone value. The degree of deterioration increases as the relative hue value decreases, not depending only on the wire diameter reduction amount. In this case, the degree of deterioration increases as the degree of deterioration advances from A to D, and it is determined that replacement is necessary in D.

【００１４】[0014]

【発明の効果】以上説明したように、本発明によれば、
架空線に非接触で、かつ、遠隔からも架空線の劣化度を
検知できるので、点検作業の危険性を十分に回避でき
る。また、地上アクセスによって、定量的な点検が迅速
に行なえる。また、本発明によれば、高温物体及び高所
物体等、危険性の高い場所における測定が可能であり、
遠隔監視、モニタリングによる常時監視、点検への応用
が可能である。As described above, according to the present invention,
Since the degree of deterioration of the overhead line can be detected remotely without contacting the overhead line, the risk of inspection work can be sufficiently avoided. In addition, ground access allows quick quantitative inspection. Further, according to the present invention, it is possible to measure in high-risk places such as high-temperature objects and high-altitude objects,
Remote monitoring, constant monitoring by monitoring, and application to inspection are possible.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の架空線劣化診断装置の一実施例の構成
図である。FIG. 1 is a configuration diagram of an embodiment of an overhead line deterioration diagnosing device of the present invention.

【図２】本発明の劣化判定部の一実施例の構成図であ
る。FIG. 2 is a configuration diagram of an embodiment of a deterioration determination unit of the present invention.

【図３】本発明の劣化判定部の動作過程図である。FIG. 3 is an operation process diagram of a deterioration determination unit of the present invention.

【図４】亜鉛メッキ鋼撚線を診断した場合に劣化判定部
の決定する劣化度判定図である。FIG. 4 is a deterioration degree determination diagram determined by a deterioration determination unit when a galvanized steel twisted wire is diagnosed.

【図５】従来の目視による劣化診断法の説明図である。FIG. 5 is an explanatory view of a conventional visual deterioration diagnosis method.

【図６】従来の電磁誘導法による劣化診断方法の説明図
である。FIG. 6 is an explanatory diagram of a deterioration diagnosis method using a conventional electromagnetic induction method.

【符号の説明】[Explanation of symbols]

６ 撮像機 ７ 伸縮棹 ８ 電源部 ９ 劣化判定部 １０ 伸縮制御部 １１ 駆動部 １２ 駆動制御卓 １３ 劣化判定部 １４ 画像人力信号 １５ 距離入力信号 １６ 明度調整部 １７ 明度基準データ １８ 画像調整部 １９ 線径測定部 ２０ 色調測定部 ２１ 劣化度基準ＤＢ ２２ 劣化度記録部 ２３ 劣化度判定部 ２４ 画像記録部 6 Imager 7 Expansion rod 8 Power supply unit 9 Deterioration determination unit 10 Expansion control unit 11 Drive unit 12 Drive control console 13 Deterioration determination unit 14 Image human power signal 15 Distance input signal 16 Brightness adjustment data 17 Brightness reference data 18 Image adjustment unit 19 Wire Diameter measuring unit 20 Color tone measuring unit 21 Degradation standard DB 22 Degradation recording unit 23 Degradation determination unit 24 Image recording unit

───────────────────────────────────────────────────── フロントページの続き (72)発明者 増田 順一 東京都千代田区内幸町１丁目１番６号 日 本電信電話株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Junichi Masuda 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 架空線に非接触で、かつ遠隔からの測定
によって架空線画像を得、前記架空線画像を基にし、新
品時の線径並びに色調値と比較し、架空線径の減肉量及
び架空線画像の色調（明度、色相、彩度）によって、架
空線の腐食あるいは環境劣化による架空線の劣化度を、
定量化することを特徴とする架空線劣化診断方法。1. An overhead wire image is obtained by non-contact and remote measurement with the overhead wire, and based on the overhead wire image, the wire diameter and the color tone value at the time of new article are compared to reduce the thickness of the overhead wire diameter. Depending on the quantity and color tone (lightness, hue, saturation) of the overhead line image, the degree of deterioration of the overhead line due to corrosion of the overhead line or environmental degradation
A method for diagnosing overhead line deterioration characterized by quantification. 【請求項２】 架空線までの距離を自動的に測定すると
ともに、架空線の画像を入力する撮像機と、前記撮像機
を地上より接近させる伸縮棹と、前記伸縮棹を所定の位
置まで伸縮させる伸縮制御部と、前記撮像機を架空線に
平行して移動させる測定機駆動部と、前記撮像機から得
た画像情報から架空線径の減少量及び色調から架空線の
劣化度を判定する劣化判定部と、各部に電力を供給する
電源部からなることを特徴とする架空線劣化診断装置2. An image pickup device for automatically measuring a distance to an overhead line and inputting an image of the overhead line, an expansion rod for bringing the imager closer to the ground, and an expansion rod for expanding and contracting to a predetermined position. An expansion / contraction control unit, a measuring machine driving unit that moves the image pickup device in parallel with the overhead line, a reduction amount of the overhead line diameter from the image information obtained from the image pickup device, and a deterioration degree of the overhead line from the color tone are determined. An overhead line deterioration diagnosis device comprising a deterioration determination unit and a power supply unit that supplies electric power to each unit.
JP25832891A 1991-09-09 1991-09-09 Method and device for diagnosing deterioration of overhead wire Pending JPH0571928A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25832891A JPH0571928A (en) 1991-09-09 1991-09-09 Method and device for diagnosing deterioration of overhead wire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25832891A JPH0571928A (en) 1991-09-09 1991-09-09 Method and device for diagnosing deterioration of overhead wire

Publications (1)

Publication Number Publication Date
JPH0571928A true JPH0571928A (en) 1993-03-23

Family

ID=17318725

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25832891A Pending JPH0571928A (en) 1991-09-09 1991-09-09 Method and device for diagnosing deterioration of overhead wire

Country Status (1)

Country Link
JP (1) JPH0571928A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005057956A (en) * 2003-08-07 2005-03-03 Central Res Inst Of Electric Power Ind Method, device, and program for detecting electric wire abnormality by image processing, and method for forming image for electric wire inspection
JP2008276805A (en) * 2008-08-04 2008-11-13 Central Res Inst Of Electric Power Ind Method of creating image for electric wire inspection
JP2009133670A (en) * 2007-11-29 2009-06-18 Kankou:Kk Track inspection apparatus of straddling type monorail

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005057956A (en) * 2003-08-07 2005-03-03 Central Res Inst Of Electric Power Ind Method, device, and program for detecting electric wire abnormality by image processing, and method for forming image for electric wire inspection
JP2009133670A (en) * 2007-11-29 2009-06-18 Kankou:Kk Track inspection apparatus of straddling type monorail
JP2008276805A (en) * 2008-08-04 2008-11-13 Central Res Inst Of Electric Power Ind Method of creating image for electric wire inspection

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