Differential thermal sensor
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United States of America Patent
Stats
-
Jan 14, 1992
Grant Date -
N/A
app pub date -
May 23, 1990
filing date -
May 23, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
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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