Ultrasonic measuring device

Details Ultrasonic measuring device Ultrasonic measuring device

1981-06-22

1984-01-10

Ruehl, Charles A.

Measuring and testing

Volume or rate of flow

By measuring vibrations or acoustic energy

G01F 166

Patent

active

044247150

ABSTRACT:
The apparatus herein relates to an ultrasonic measuring device having a quadrupole circuit unit. Two ultrasonic converter circuits are alternately and complementary operable as transmitter and receiver circuits and have terminals on opposite sides of the quadrupole circuit unit. The quadrupole circuit unit has a transmission signal generator on the input side thereof and a receiver amplifier on the output side thereof. This kind have a zero point displacement which becomes noticeable by the fact that during a measurement in static liquid the measured signal has different values depending on the direction. As only one transmission signal generator and only one receiver amplifier are used, these values cannot be eliminated as is possible in the case of known constructions with two transmitters. This problem is dealt with by forming substantially equal terminating impedances of the quadrupole formed by both ultrasonic conveyor circuits and by providing the transmission signal generator in the form of a current generator.

REFERENCES:
patent: 2724269 (1955-11-01), Kalmus
patent: 3835704 (1974-09-01), Elazar et al.
patent: 4164865 (1979-08-01), Hall et al.
patent: 4202210 (1980-05-01), Multon et al.
patent: 4312238 (1982-01-01), Rey

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