Differential thermal sensor

Details Differential thermal sensor Differential thermal sensor

1990-05-23

1992-01-14

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

2503381, 374121, G01J 526

Patent

active

050813595

ABSTRACT:
A differential temperature sensor uses two different thermopiles each encased in its own can. The thermopiles are given a position and spatial orientation to best suit the measuring task. A connector of low thermal impedance thermally connects the cold junctions of the two thermopiles. The connector is adjusted, angled or pivoted to allow the proper relative orientation of the thermopiles. The thermopiles are placed close to the detected areas to keep the thermopile cold junctions and a detected reference area close in temperature. An automatic assembly process uses the present invention in conjunction with a photoelectric switch which confirms the presence of the subject being measured. An improved chiropractic measuring device also uses the differential sensor to accurately sense nerve damage near the spine.

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Amperes/Phillips Flyer on Low Profile IR Sensors.
Amperex Electronic Corporation Technical Publication No. 147, pp. 1-5, Feb. 1985.
Exergen Corporation Electronic Schematic of Sensor Circuit Jul. 9, 1986.
Exergen Corporation Electronics Schematic by M. B., Oct. 1, 1986.

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