Space indicator between trailed rear end and parking position limits

摘要

At least one transmitter for ultrasonic, IR, microwave etc. signals, and a sensor for reflected signals is located at the trailer (12) rear. The signals are processed by an evaluator and there is an indicator of the distance of the driver's cab (11). A modulator (20) at the trailer feeds the signals of the evaluator, or the distance signals to an HF carrier. A demodulator in the driver's cab demodulates the signals transmitted via the DC voltage supply line (21) of the articulated vehicle, and supplies them to the indicator.