Ultrasonic temperature sensor

Details Ultrasonic temperature sensor Ultrasonic temperature sensor

1985-07-01

1986-09-09

Frankfort, Charles

Thermal measuring and testing

Temperature measurement

By a vibratory effect

374119, G01K 1122

Patent

active

046105514

ABSTRACT:
An ultrasonic temperature sensor is based upon the variation in the speed of propagation of a torsional wave in a material whose torsional modulus varies as a function of temperature. A transducer for producing a torsional wave is coupled through an acoustic waveguide to a sensor element which has a torsional modulus which varies with temperature. A discontinuity in the sensor causes a portion of the torsional wave to be reflected while the remainder traverses the sensor and is reflected. The time delay between the first and second pulses is thus a measure of the temperature.

REFERENCES:
patent: 3214977 (1965-11-01), Apfel
patent: 3487690 (1970-01-01), Bell et al.
patent: 3540265 (1970-11-01), Lynnworth
patent: 3584327 (1971-06-01), Murry
patent: 3595082 (1971-07-01), Miller, Jr.
patent: 3717033 (1973-02-01), Gordon et al.
patent: 3738171 (1973-06-01), Shepard et al.
patent: 4541732 (1985-09-01), Shah

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