LEAKAGE DETECTION METHOD AND LEAKAGE DETECTOR

To provide a leakage detection method and a leakage detector which can detect with good accuracy the position of a moving body in a conduit in which liquid having pressure circulates, and more accurately detect the presence of leakage and a leakage position.SOLUTION: The leakage detection method includes: setting, in a conduit where leakage is to be detected, a detection start point and a monitoring point which is apart a prescribed distance from the detection start point and at which a monitoring device monitoring the inside of the conduit is arranged; moving a moving body, together with liquid, which is formed so that the sound transmitted via the liquid can be collected and recorded when the liquid circulates, and collecting and recording the transmitted sound while counting from the detection start point; monitoring the inside of the conduit by the monitoring device arranged at the monitoring point that is set in the conduit while counting with the same time base as when counting the moving body from the detection start point; and detecting a leakage position in the conduit by the time of day when it is detected by the monitoring device that the moving body has passed through the monitoring point, the time of day at the detection start point, and sound data on the sound transmitted via the liquid having been received and recorded by the moving object in the movement process.SELECTED DRAWING: Figure 2 【課題】圧力を持った液体が流通する管路に於ける移動体の位置を精度よく検出すること、漏れの有無、漏洩位置をより正確に検知することができる漏洩検知方法と、漏洩検知装置を提供する。【解決手段】漏洩検知方法は、漏れを検知すべき管路に、検知起点及び該検知起点から所定距離離隔し且つ該管路の内部を監視する監視装置を配置した監視点を設定し、液体が流通する際に該液体を介して伝達された音を集音記録し得るように構成された移動体を液体と共に移動させると共に前記検知起点から計時しつつ伝達音を集音して記録し、移動体の前記検知起点からの計時と同一時間軸で計時しつつ管路に設定された監視点に配置された監視装置によって該管路の内部を監視し、監視装置によって移動体が監視点を通過したことを検出したときの時刻と検知起点に於ける時刻と、移動体が移動過程で受信して記録した液体を介して伝達された音の音データと、によって、管路に於ける漏洩位置を検知する。【選択図】 図２