Thermal measuring and testing – Temperature measurement – Composite temperature-related paramenter
Patent
1981-01-26
1983-09-27
Yasich, Daniel M.
Thermal measuring and testing
Temperature measurement
Composite temperature-related paramenter
374111, 374170, 374179, G01K 302, G01K 714
Patent
active
044065507
ABSTRACT:
A temperature monitoring and display system is used in conjunction with two or more low temperature sensors which produce output currents representative of the temperature being sensed. The currents produced are converted to voltages and applied through differential amplifier circuits to produce output analog signals representative of the sensed temperatures. These signals also are applied to a differential comparator which produces an output signal having a sign and magnitude representative of the difference in the sensed temperatures. A switch is used to select any one of the outputs of the first and second differential amplifiers or the comparator and to apply this output signal to an analog-to-digital converter, the outputs of which then are used to drive a suitable digital display. The output of the comparator itself also may be applied to a suitable utilization circuit and to alarm threshhold detectors to indicate conditions when the temperature relationships sensed by the two sensors exceeds some preestablished relationship.
REFERENCES:
patent: 3814957 (1974-06-01), Way
patent: 4109235 (1978-08-01), Bouthors
patent: 4114442 (1978-09-01), Pratt
patent: 4117670 (1978-10-01), Dombkowski et al.
patent: 4122720 (1978-10-01), Podl
patent: 4209774 (1980-06-01), Bendler
patent: 4298947 (1981-11-01), Tamura et al.
Garrett Lane S.
Ptak LaValle D.
Yasich Daniel M.
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