Noise rejection in a sonic transducer

Details Noise rejection in a sonic transducer Noise rejection in a sonic transducer

1985-07-08

1988-01-26

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

307234, 307470, G01R 2704, H03K 522

Patent

active

047219025

ABSTRACT:
A method of time domain noise rejection in a sonic transducer is disclosed in which all signal reception is prevented between application of a periodic electrical pulse and reception of the corresponding electrical signal. An inhibit signal, produced for a substantial portion of the time interval between application of an electrical pulse and reception of the corresponding electrical return signal, blocks all noise that may occur to provide a false indication of a return electrical signal during the time of the inhibit signal.

REFERENCES:
patent: 3189849 (1962-04-01), Tellerman
patent: 3413544 (1966-02-01), Jotten et al.
patent: 3898555 (1975-08-01), Tellerman
patent: 4104582 (1978-08-01), Lambertsen
patent: 4135397 (1979-01-01), Krake
Acknowledged as prior art is the Series DCTL Precision Continuous Liquid Level Sensor of Temposonics Incorporated.
Acknowledged as prior art is the Series DCTR Non Contacting Potentiometer of Temposonics Incorporated.

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