Thermal measuring and testing – Temperature measurement – In spaced noncontact relationship to specimen
Patent
1982-05-04
1986-04-22
Yasich, Daniel M.
Thermal measuring and testing
Temperature measurement
In spaced noncontact relationship to specimen
128653, 128736, 343450, G01K 100, G01J 552, A61N 140
Patent
active
045838690
ABSTRACT:
To measure the temperature of a sub-surface volume of a body, for example, living tissue, in microwaves, at least two probes are placed on or near the surface of the body to pick up thermal noise in the microwave range. The two probes are positioned so that the volumes of the body from which the respective probes receive thermal noise signals overlap to provide a common volume from which both of the probes receive thermal noise signals. The signals received by the probes are processed so as to be amplified and to accentuate the signals emitted by the common volume relative to the signals omitted by the remainder of the volumes from which the probes receive thermal noise signals. In one form of apparatus, the two probes are connected in parallel to a correlator the output of which is connected to an amplifier-receiver. In another form of apparatus the probes are connected to an amplifier-receiver, one being connected through a phase shifter. In still another form of apparatus, the two probes are connected through a summing device to a square-law detector, one of the probes being connected through a cyclical phase shifter which is synchronized with the square wave detector.
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Chive Maurice
Constant Eugene
Leroy Yves
Mamouni Ahmed
Robillard Michele
Adams Bruce L.
Burns Robert E.
Centre National de la Recherche Scientifique
Lobato Emmanuel J.
Yasich Daniel M.
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