Measuring and testing – Gas analysis – Moisture content or vapor pressure
Patent
1979-09-10
1981-01-20
Woodiel, Donald O.
Measuring and testing
Gas analysis
Moisture content or vapor pressure
356 44, 250337, G01K 1120
Patent
active
042455073
ABSTRACT:
A temperature probe measures temperature changes within biological material while the tissue is being irradiated with microwaves. In order to measure tissue temperatures accurately a probe must be designed to function in a microwave field while causing minimum perturbation to the microwave field. This generally requires a probe being constructed of dielectric (non-metallic) material which utilizes physical phenomena which are thermally dependent yet unaffected by electromagnetic fields at the field strength and frequencies of interest. In one embodiment the structure of the probe basically includes an optical fiber bundle for conducting light both toward and away from a temperature sensitive luminescent element located at one end of the optical fiber bundle, the source for exciting the temperature sensitive element and a light responsive detection element located at the output end of the optical fiber bundle for detecting light emitted from the temperature sensitive element which is temperature dependent. The light received by the light responsive detection element can be analyzed with regard to several parameters (intensity, frequency and phase) and thereby used for indicating the temperature of the biological sample or tissue.
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Danchuk William A.
Woodiel Donald O.
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