Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1990-05-01
1991-04-30
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
250349, G08G 117
Patent
active
050120999
ABSTRACT:
The arrangement (201) comprises an optical narrow detection beam (203) focussing system for a passive infrared radiation in accordance with a reference plane (U). A filter selects the spectral analysis band and at least one passive infrared radiation detector is provided in the focal plane. According to the invention, the arrangement comprises a first analog processing chain and a second digital processing chain by means of which it is possible to recover in accordance with a characteristic curve at least the undercarriage of vehicles. On this curve, each turning element of the undercarriage assumes the shape of an identifiable pulse. The arrangement is used in the identification of moving vehicles in a predetermined plane.
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Magne Francois
Paturel Serge
Botjer William L.
Hannaher Constantine
U.S. Philips Corp.
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