Leak testing system for pipes - has generator for producing pressure difference between inside and outside of pipe and microphones for detecting noises typical of leaks inside pipe and correction microphones outside.

摘要

The system produces a pressure difference inside the pipe wrt. the outside. Microphones (6,7) inside the pipe detect noises typical of leaks which are analysed for loudness, frequency and position. An external microphone (8) detects external noises for correction purposes. Directional microphones, or microphones mounted on a lance, can be used to ensure accurate location of leakage points. USE/ADVANTAGE - Esp. for testing concrete or stoneware pipes. Overcomes e.g. long settling times and lack of sensitivity.