LEAK DETECTION METHOD AND LEAK DETECTOR

PROBLEM TO BE SOLVED: To reduce noise generation and to detect leakage and its position in a pipe by moving a body along the approximate center of the pipe through which pressurized liquid flows.SOLUTION: In the leak detection method, a movable body 1 is moved together with liquid along an approximate center of a pipe B. The movable body is configured so as to collect and record the sound transmitted through the liquid when a pressurized liquid flows through the pipe and to detect its movement position in the pipe. From the data of sound transmitted through the liquid and recorded during the movement of the movable body and the detected movement position of the movable body in the pipe, a leakage position in the pipe is detected. The leakage detector A has the movable body 1 that is arranged with: a sound collection member 10 whose outside diameter is smaller than an inner diameter of a pipe and which collects sound transmitted through the liquid; a recording member 11 for recording the collected sound; and a position detection member 12 for detecting the movement position, and that moves together with the liquid. The specific gravity of the moving body is substantially the same as that of the flowing liquid.SELECTED DRAWING: Figure 2 【課題】圧力を持った液体が流通する管路の略中心に沿って移動体を移動させることで、ノイズの発生を低減して管路の漏れの有無、漏洩位置を検知する【解決手段】漏洩検知方法は、管路Ｂを圧力を持った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すると共に管路内に於ける移動位置を検知し得るように構成された移動体１を、液体と共に該管路の略中心に沿って移動させ、移動体の移動過程で記録した液体を介して伝達された音の音データと、検知した移動体の管路内に於ける移動位置と、によって、管路に於ける漏洩位置を検知する。漏洩検知装置Ａは、外径が管路の内径よりも小さく、液体を介して伝達された音を集音する集音部材１０と、集音した音を記録する記録部材１１と、移動位置を検知するための位置検知部材１２と、が配置され且つ液体と共に移動する移動体１を有し、移動体の比重が流通する液体の比重と略同じである。【選択図】 図２