ORIENTATION SYSTEM

To provide an orientation system which has high positioning accuracy of a failure generation position of a power cable.SOLUTION: An orientation system 100 for orienting an accident point of a power cable 4 includes an optical fiber cable 41 which is installed in parallel with the power cable 4, an orientation master unit 2, an orientation slave unit 3 and an information processing device 1. The orientation master unit 2 includes a transmission device 22 that makes light incident on one end of one optical fiber cable 41a to transmit it. The orientation slave unit 3 includes a branching device 32 that branches light emitted from the other end, and makes the light incident on one end of the other optical fiber cable 41b of the pair of optical fiber cables 41. The orientation master unit 2 includes a master unit reception device 23 which receives the emission light emitted from the other end. The information processing device 1 includes: an emission control unit 101 which emits light; a reception light change reception unit 102 which receives the time change of the intensity of the received light; and an accident point derivation unit 103 which derives an accident point A on the basis of the time of change in the intensity of the received light and the propagation speed of the light.SELECTED DRAWING: Figure 1 【課題】電力ケーブルの障害発生位置の測位精度の高い標定システムを提供すること。【解決手段】電力ケーブル４の事故地点を標定する標定システム１００は、電力ケーブル４に並行して設置される光ファイバケーブル４１と、標定親機２と、標定子機３と、情報処理装置１とを有し、標定親機２は、一方の光ファイバケーブル４１ａの一端に光を入射させて送信する送信装置２２を有し、標定子機３は、他端から出射する光を分岐して一対の光ファイバケーブル４１の他方の光ファイバケーブル４１ｂの一端に入射させる分岐装置３２を有し、標定親機２は、他端から出射する出射光を受信する親機受信装置２３を有し、情報処理装置１は、光を出射させる出射制御部１０１と、受信した光の強度の時間変化を受け付ける受信光変化受付部１０２と、受信光の強度の変化する時刻、及び光の伝播速度に基づいて事故地点Ａを導出する事故地点導出部１０３と、を有する。【選択図】図１