G - Physics – 01 – S
Patent
G - Physics
01
S
343/70, 340/124.
G01S 17/46 (2006.01)
Patent
CA 1285636
ABSTRACT OF THE DISCLOSURE A proximity detecting and warning system for use in collision avoidance, particularly with aircraft. The system responds to pulsed light sources within a selected frequency band and particularly the frequency of aircraft strobe and rotating beacon light sources while disregarding any other natural steady state light sources as well as man-made light sources such as street lighting and ground lighting sources. The system detects pulsed light sources on aircraft or vehicles within the proximity pilot or operator. The alarm occurs when another aircraft is within the detection envelope which typically extends in an elliptical pattern around the transmitter in all directions with a detection range of up to approximately three miles. The circuit is designed to detect the strobe or rotating beacons having frequencies standardized by Federal Regulation which also requires that these sources be illuminated at all times during flight. The proximity sensing system has a light pulse detector, a circuit for limiting the response of the device to the particular frequencies selected, and processing circuits which process received signals to discriminate between the selected frequencies and activates the visual and audible alarms.
540185
Smart & Biggar
Snaper Alvin Allyn
LandOfFree
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