Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1979-04-12
1981-02-10
Ruehl, Charles A.
Measuring and testing
Gas analysis
Moisture content or vapor pressure
310313R, 331107A, G01K 1124
Patent
active
042494184
ABSTRACT:
A transmitting section includes an oscillator which has a surface acoustic wave device of which the frequency characteristic varies responding to the temperature of a base plate thereof, the oscillator generating an oscillation output of a frequency corresponding to the frequency characteristic and an antenna for transmitting the oscillation output. A receiving section includes a receiving antenna, a means for detecting the output of the receiving antenna, and a signal processing circuit for processing the output of the detecting means to generate at least one of the temperature display and control signals of the base plate of the surface acoustic wave device.
REFERENCES:
patent: 3983424 (1976-09-01), Parks
patent: 4096740 (1978-06-01), Sallef
Barrett et al., Journal of Meterology, vol. 6, No. 4, Aug. 1949, pp. 273-276.
Reeder, Proceedings of the IEEE, vol. 64, No. 5, May 1976, pp. 754-756.
Lewis, Surface Acoustic Wave Devices and Applications, Ultrasonics, May 1974, pp. 115-123. _
Maines et al., Simple Technique for the Accurate Determination of Delay, Electronic Letters, vol. 5, No. 26, Dec. 27, 1969, pp. 678-680. _
Ruehl Charles A.
Tokyo Shibaura Denki Kabushiki Kaisha
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