Measuring and testing – Vibration – Sensing apparatus
Patent
1994-08-18
1997-04-29
Williams, Hezron E.
Measuring and testing
Vibration
Sensing apparatus
73 405A, 73 52, 73579, 73587, 738665, 376249, 376252, 364508, 364550, G01H 1100, G01M 300, G21C 1700
Patent
active
056251505
ABSTRACT:
A sensor system for mapping absolute acoustic noise intensity in a three-dimensional acoustic noise field. Localized noise sources within a vessel are extracted using a distant array of transducers mounted on the vessel wall. The absolute intensity can be measured even when totally masked by background noise at the transducer locations. The system includes an integrated transducer installation. Each transducer is an accelerometer which is mounted on the vessel wall using a rigid attachment rod which serves as an ultrasonic waveguide. The output of each transducer is split into low- and high-frequency components, the low-frequency component being a function of the vibrational displacement of the localized portion of the vessel wall and the high-frequency component being a function of the vibrational/ultrasonic waves propagating through the localized portion of the vessel wall.
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Gaubatz Donald C.
Greene David A.
Greene Rosemary A.
General Electric Company
McGinness James E.
Moller Richard A.
Williams Hezron E.
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