IN-GROUND PIPELINE MONITORING

摘要

A method for monitoring an in-ground pipeline (12) by detecting an occurrence of a contact with an in-ground pipeline via an acoustic sensor (22) employing a first selected detection parameter and a second sensor (32) employing a second selected detection parameter, which is different from the first selected detection parameter. The locations of the acoustic sensor and the second sensor are known and the input signals from the sensors arrive at a processor (26) at different times and at known respective speeds such as to permit a determination of the point of contact with in-ground pipeline.