Constant power thermal sensor

Details Constant power thermal sensor Constant power thermal sensor

1990-03-16

1991-07-09

Lall, Parshotam S.

Boots, shoes, and leggings

36457103, 340622, 374 44, 374183, 73295, G01K 700

Patent

active

050311263

ABSTRACT:
A constant power thermal property sensor compensates for changes in the temperature of the medium into which the sensor is disposed. The sensor has two side-by-side probes mounted in the medium with resistances that vary with temperature. A constant power source produces a current through the first probe and a current source applies a current to the second probe at a fixed ratio of the current in the first probe. The voltages across the probes are monitored and compared, and a signal is produced which is divided by current through the first probe. The resulting signal is representative of the heat transfer between the probes and the medium. The signal does not appreciably vary with changes in the temperature of the medium, and the medium may be a liquid, a gas, a liquid flow, a gas flow, or a combination of media. In this construction, two principal applications for the sensor are liquid level detectors and flow monitors.

REFERENCES:
patent: 3302458 (1967-02-01), Scadron
patent: 3479875 (1969-11-01), Riddell
patent: 3678749 (1972-07-01), Harper
patent: 4102199 (1978-07-01), Tsipouras
patent: 4209837 (1980-06-01), Brown
patent: 4326199 (1982-04-01), Tarpley et al.
patent: 4479190 (1984-10-01), Takai et al.
patent: 4513617 (1985-04-01), Hayes
patent: 4588308 (1986-05-01), Saito
patent: 4590797 (1986-05-01), Beaubatie et al.
patent: 4602871 (1986-07-01), Hanaoka
patent: 4609292 (1986-09-01), Asano et al.
patent: 4713783 (1987-12-01), Fletcher
patent: 4771393 (1988-09-01), Ishida et al.

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