Method and means for measuring temperature using acoustical reso

Details Method and means for measuring temperature using acoustical reso Method and means for measuring temperature using acoustical reso

1978-10-30

1980-11-18

Ruehl, Charles A.

Measuring and testing

Gas analysis

Moisture content or vapor pressure

73579, G01K 1126

Patent

active

042338433

ABSTRACT:
The temperature of an environment is determined by measuring the acoustical response of a temperature sensitive two mode resonator placed in the environment. Two variable frequency signals are generated and applied to the resonator, and the two resonant frequencies of the resonator are determined. Frequency difference of the two frequencies is determined, and if the difference lies within a substantially uniform frequency range, the environment temperature is calculated from at least one of the frequencies. If the difference lies outside of the substantially uniform frequency range, then at least one of the two signals is spurious and no temperature calculation is made.

REFERENCES:
patent: 3318152 (1967-05-01), Thompson et al.
patent: 3826931 (1974-07-01), Hammond
patent: 4039969 (1977-08-01), Martin
patent: 4102195 (1978-07-01), Thompson et al.

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