Ultrasonic temperature measuring apparatus

Details Ultrasonic temperature measuring apparatus Ultrasonic temperature measuring apparatus

1979-02-14

1980-08-05

Gill, James J.

Measuring and testing

Vibration

Resonance, frequency, or amplitude study

73339A, G01N 2900, G01K 1124

Patent

active

042155827

ABSTRACT:
An ultrasonic temperature measuring apparatus includes a display section and a sensor section connected therebetween with a signal line and a ground line. The display section produces and transmits an excitation signal producing signal having a frequency 1/N times that of an excitation signal for a ultrasonic vibrator over the signal line to the sensor section. In the sensor section, in response to the excitation signal producing signal, the excitation signal is produced to excite the ultrasonic wave vibrator and to transmit the ultrasonic wave continuously into a propagation medium. The ultrasonic wave received at a receiver spaced from the ultrasonic vibrator by a predetermined distance is phase compared with the excitation signal and a pulse difference signal having a pulse width indicative of the phase difference and hence a temperature of the propagation medium is produced. The pulse width signal conveying temperature information of the medium is transmitted from the sensor section to the display section over the same signal line. The signal levels of the excitation signal producing signal and the temperature information signal are made different levels to distinguish from each other.

REFERENCES:
patent: 3320808 (1967-05-01), Boyd et al.
patent: 3620070 (1971-11-01), Collins
patent: 4147064 (1979-04-01), Bond

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