Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1979-06-01
1981-01-27
Woodiel, Donald O.
Measuring and testing
Gas analysis
Moisture content or vapor pressure
128736, 128773, G01K 100
Patent
active
042467845
ABSTRACT:
Passive non-invasive temperature measurement of the interior of a body is accomplished by using the acoustic thermal noise spectra of the body. One or more acoustic transducers are coupled with the surface of the body to intercept the acoustical noise signal from within the interior of the body along well defined paths to generate a corresponding electrical signal. The noise power spectrum of the electrical signal is analyzed by means of a power spectrum analyzer to develop an output representing the temperature-depth distribution along said paths. The output of the power spectrum analyzer may be displayed and/or recorded or subjected to further signal processing.
REFERENCES:
"Subcutaneous Temperatures: A Method of Non-Invasive Sensing," Science, vol. 190, Nov. 1975, pp. 669-671.
"Atmospheric Absorption Measurements with a Microwave Radiometer," Physical Review, vol. 70, 9-1946, pp. 340-347.
Journal of the Optical Society of America, vol. 49, #10, 10-1959, pp. 1004-1007.
Journal of Geophysical Research, vols. 67, 68, pp. 4259 et seq., and 1683-1703, respectively, 1962, 1963.
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