Obstacle detector system for motor vehicle - has transmitter and receiver units at four extremities proving distance signals for central display unit

摘要

A transmitter and receiver unit is positioned at each of the four extremities of a motor vehicle. The transmitter transmits a wave at a predetermined angle and the wave is reflected by an obstacle for return to the receiver. The receivers provide signals for a central unit inside the vehicle. This provides a reading of distance from the obstacle. Audible and visual signals are activated within a predetermined and adjustable range from the obstacle. These operate with increasing urgency as the distance decreases to allow the vehicle driver to stop the particular manoeuvre.