Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1995-01-24
1996-11-05
Eldred, J. Woodrow
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367160, 367162, 310337, 310345, 310356, H04R 1700
Patent
active
055724876
ABSTRACT:
A high frequency transducer capable of transmitting and receiving having an operational range from 100 kHz to 2 MHz, a free field voltage sensitivity (FFVS) greater than -218 dB re 1 V/.mu.Pa (300 kHz), and a maximum hydrostatic pressure rating of 20.68 Mpa (3000 psi). The sensor element is made of lead titanate with a radial mode of 150 kHz being suppressed by the use of a rubber grommet surrounding the lead titanate element. The sensor element is retained within a sensor housing by a plurality of annealed iron wires attached to an annealed iron ring, both of the faces of the sensor housing are then covered with an acoustically transparent window of natural gum rubber. The sensor housing is attached to a non-metallic preamplifier housing made of a rigid polyurethane containing a preamplifier circuit, a transmit protection circuit, and a plurality of relays for switching the preamplifier circuit during the transmit and receive modes. A remotely control unit is connected to the transducer through a cable attached to a connector located on the preamplifier housing. The sensor housing and preamplifier housing are joined together electrically by a slip fit coaxial coupler for ease of maintenance and repair.
REFERENCES:
patent: 3054982 (1962-09-01), Kieser
patent: 3202962 (1965-08-01), Elston
patent: 3255431 (1966-06-01), Howatt
patent: 4010441 (1977-03-01), Richard
patent: 4694440 (1987-09-01), Ogura et al.
patent: 4789971 (1988-12-01), Powers et al.
patent: 5155707 (1992-10-01), Fisher
Ivey, A New Standard Reversible Transducer (USRD Type E37) For High Frequy to 2MHz, Oral Presentation, J. Acous. Soc. of Amer., vol. 94, No. 3, Pt. 2, p. 1831, Sep. 1993.
Eldred J. Woodrow
McDonnell Thomas E.
Stockstill Charles
The United States of America as represented by the Secretary of
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