Patent ID: 6150956
Filing Date: 2000-11-21
Classification: G01S

Abstract:
A proximity warning system for warning of the proximity of an obstacle within at least one zone of interest adjacent to a vehicle, the system comprising:(a) at least one primary sensor deployed to receive radiation from at least part of the zone of interest, said primary sensor being configured to produce a primary output indicative of a quantity of electromagnetic radiation incident on said primary sensor;(b) means for generating a compensation output indicative of a quantity of background electromagnetic radiation incident on said primary sensor;(c) at least one transmitter configured to transmit an electromagnetic signal towards at least part of the zone of interest;(d) a compensation module associated with said means for generating a compensation output and said transmitter, said compensation module being responsive to said compensation output to vary a transmission power of said electromagnetic signal; and(e) a processing module associated with at least said primary sensor, said processing module being responsive to said primary output to generate a warning signal.