Thermal measuring and testing – Temperature measurement – In spaced noncontact relationship to specimen
Patent
1990-10-19
1992-03-10
Cuchlinski, Jr., William A.
Thermal measuring and testing
Temperature measurement
In spaced noncontact relationship to specimen
374124, 374129, 356 43, G01J 556
Patent
active
050945440
ABSTRACT:
A scanning infrared sensor (10) in which the scanner (21), detector (32) and temperature converter (35) are all contained in proximity with one another in a single housing assembly (18) enables correction of both emissivity based on emissivity settings (41) for each of a plurality of spot targets (16') along a scan line (16) and correction for DC offset errors based on reference temperature measurement (45) of hot and cold references (34, 36). Correction is performed before digital conversion by an A/D converter (56) by a nulling circuit (46), a programmable gain circuit (50) and a bias circuit (62) to produce corrected digital temperature signals on a plurality of output ports (26) respectively associated to a plurality of spot targets (16') along a scan line (16) on a target (12) which are individually connectable with a multiple temperature display (27), a temperature recorder (28) and a process control (30).
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Bennett G. Bradley
Cuchlinski Jr. William A.
Femal Michael J.
Potthast James W.
Square D Company
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