Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1979-10-24
1981-01-27
Goldberg, Gerald
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
330297, 7386128, G01F 105
Patent
active
042468000
ABSTRACT:
In a measuring instrument for obtaining information about a medium through which ultrasonic signals can be transmitted or from which ultrasonic signals can be reflected, transducers (21 and 22) are provided for sending and receiving the ultrasonic signals. Electronic amplification means (25) is provided to amplify received ultrasonic signals to a level suitable for processing by a signal processor (23) to provide the desired information. A power supply (20) is provided for activating the sending and receiving transducers (21 and 22) and the amplification means (25). Strobe switching means (26) is provided for activating the power supply (20) during periodic intervals, leaving intervening spans of time when the power supply (20) is inactive. Capacitive means (32) is provided for activating the amplification means (25) when the power supply (20) is inactive,thereby precluding electronic noise generated by the power supply (20) from establishing a gain limit for the amplification means (25).
REFERENCES:
patent: 3522580 (1970-08-01), Lynch
patent: 4213099 (1980-07-01), Brown
Bidgood William E.
Klarin John D.
Bohner Hal J.
Corr Denis E.
Envirotech Corporation
Goldberg Gerald
Krebs Robert E.
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