Thermal measuring and testing – Temperature measurement – By electrical or magnetic heat sensor
Patent
1991-03-25
1992-08-11
Cuchlinski, Jr., William A.
Thermal measuring and testing
Temperature measurement
By electrical or magnetic heat sensor
374164, 374183, 73295, 364557, G01K 710, G01F 2324
Patent
active
051373700
ABSTRACT:
A thermoresistive sensor system compensates for ambient temperature of a medium. First and second side-by-side sensors are mounted in the medium, each having a resistance that varies with temperature change in the medium. A thermal compensation control circuit supplies current to the first sensor such that the cube of its current times its resistance (I.sub.1.sup.3 .times.R.sub.1) is constant. The control circuit supplies current to the second sensor at a multiple of the current through the first sensor. A signal based upon the voltages across each sensor is produced as a temperature compensated output. In this manner, the system automatically compensates for temperature changes in the medium which would otherwise degrade the accuracy of the output.
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Garcia Omar
McCulloch Reginald W.
Bennett G. Bradley
Cuchlinski Jr. William A.
Delta M Corporation
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