Abstract: An object detection system is mounted at the rear of a vehicle the trailer receiver for the vehicle. The object detection system warns the driver of the vehicle of persons or objects behind the vehicle, when the vehicle is moving backwards. The system emits microwaves rearwardly of the vehicle and senses microwave reflected from objects behind the vehicle. The microwave transceiver is mounted in the trailer receiver in place of the trailer ball that is normally mounted in the receiver.

Abstract: An object detection system adapted for use on a motor vehicle during backup operations is remotely programmable. Sensor parameters can be redefined at time of installation and can be made dependent on velocity. Alarm characteristics can also be determined through programming. The same unit can thus be adapted to operate with a wide variety of different vehicle platforms, and can be customized to individual drivers or types of drivers. The sensor includes a digital-to-analog converter used to tune the microwave oscillator. Such tuning control allows for automatic calibration at the time of final test and manufacturing.