METHOD FOR MONITORING LEAKAGE OF PIPELINE BY ACOUSTIC EMISSION

摘要

PURPOSE:To enable the positive monitoring of leakage in a long pipeline, by arranging a large number of acoustic emission (AE) sensors on a pipeline so as to provide intervals between said sensors and subjecting the detection signal from each sensor to analytical processing. CONSTITUTION:N many AE sensors 2-1-2-N are mounted on a pipeline 1 in the longitudinal direction thereof at predetermined intervals. Individual addresses are specified for the sensors 2-1-2-N and the operation control apparatus 5 in each sensor brings the converter 3 and amplifier 4 connected to itself into an operation state only when the address information in an arrived call signal coincides with its own address. The apparatuses 5 of the sensors 2-1-2-N receive call signals from a common detection signal line 6 and the output of the amplifier 4 of each sensor is sent out to a common detection signal line 7 while the output of the converter 3 is amplified. One monitor apparatus main body 10 in charge of all of the sensor 2-1-2-N sends out a call signal to the line 6 and receives the detection signal from the line 7 for analytical processing.