Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1989-09-12
1990-08-14
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367158, 367113, 367912, 310334, 310337, 381173, G01V 140, H01L 4108
Patent
active
049493167
ABSTRACT:
Electrical signal-receiving transducers for logging tools include a silicon plate having piezoresistors formed thereon and response to deflection caused by pressure waves acting on said plate to generate an electrical signal through a bridge circuit including balancing resistors. Another embodiment of the transducer comprises a curved plate which is supported in a tool cavity for response to a pressure wave to deflect and exert forces on a piezoelectric element to generate a signal proportional to the deflection and a pressure wave causing such deflection. Monopole and quadrupole arrangements of the curved plate may be used for sensing or generating symmetric and asymmetric wave forms.
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Atlantic Richfield Company
Martin Michael E.
Moskowitz Nelson
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