Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1996-08-02
1999-04-13
Westin, Edward P.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
25033904, G01J 526
Patent
active
058941266
ABSTRACT:
A thermally differentiable pattern such as hot melt adhesive is monitored in a production line system. An electrical output from a thermopile radiation sensor is applied to a detection circuit which processes the sensor electrical output to perform an inverse to the sensor transfer function and to perform a differentiation which provides a pulsed output at rising and falling edges of the sensor signal. Comparators provide respective output pulse signals representing the respective rising and falling edges. An adjustable amplifier in the circuit adjusts pulse threshold relative to sensed radiation.
REFERENCES:
patent: 4831258 (1989-05-01), Paulk et al.
patent: 5195359 (1993-03-01), Kubota et al.
Brochure, TH Series, X SUNX, 17 pages.
Brochure, NHD-1, Nordson, 3 pages.
Brochure, NHD-2, Nordson, 3 pages.
Pompei Francesco
Ternullo Janus
Exergen Corporation
Hanig Richard
Westin Edward P.
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