Patent ID: 6044632
Filing Date: 2000-04-04
Classification: G05D

Abstract:
A backup proximity sensor for a vehicle, the sensor comprising:a first passive infrared sensor (PIR), the first PIR having a first field of view and generating a first output signal in response to a warm body being detected within the first field of view;a second passive infrared sensor (PIR), the second PIR having a second field of view and generating a second output signal in response to a warm body being detected within the second field of view;a support member, the first PIR and the second PIR being affixed to the support member substantially vertically with respect to one another, the first PIR and the second PIR being angularly directed such that the first field of view and the second field of view intersect, the intersection defining a detection zone, the support member being pivotally mounted to provide for scanning of the detection zone in a region behind the vehicle;a pivotal drive mechanism driving the support member; anda detection circuit, the detection circuit being responsive to the first output signal and the second output signal, the detection circuit providing a third output signal indicative of a warm body being present within the detection zone.