Apparatus for measuring temperature of ultrasonic wave propagati

Measuring and testing – Gas analysis – Moisture content or vapor pressure

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G01K 1124

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active

042155754

ABSTRACT:
An ultrasonic wave signal transmitted from an ultrasonic wave transmitter and propagating through an ultrasonic wave propagation medium is received by two ultrasonic wave receivers disposed in a sensor part in a relation spaced apart by a predetermined distance from each other in the direction of transmission of the signal. The sensor part generates a detected phase difference signal having a pulse width corresponding to the phase difference between the ultrasonic wave signal received by one of the two receivers and that received by the other receiver. This detected phase difference signal is applied to a measuring/display part which generates a pulse signal having the number of pulses corresponding to the detected phase difference, and an up/down counter counts the number of pulses of this pulse signal. On the basis of the result of counting by the counter, the temperature of the medium between the transmitter and the receivers is measured and displayed on a display.

REFERENCES:
patent: 3320808 (1967-05-01), Boyd et al.
patent: 3501956 (1970-03-01), Yamaga et al.
patent: 3631340 (1971-12-01), Miller
patent: 4061415 (1977-12-01), Taenzer

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