Measuring and testing – Vibration – Sensing apparatus
Patent
1981-09-28
1988-05-31
Birmiel, Howard A.
Measuring and testing
Vibration
Sensing apparatus
73657, 73 405A, 73 491, 340555, 340557, 350358, G01N 2904
Patent
active
047473096
ABSTRACT:
Structures, for example pipe-lines and chemical process equipment, are provided with linear microphones sensitive to vibration associated with the structure. By monitoring the modulation of carrier signals in the microphone actual or incipient faults in the structure are detected.
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Birmiel Howard A.
Imperial Chemical Industries plc
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