Device for Detecting the Position of a First or Second Vehicle to be Coupled Together

A road train on which is mounted a device for detecting the position of a first or second vehicle to be coupled together, wherein the road train comprises a first and at least one second vehicle and the device comprises a sensor device which can be is arranged on the first or second vehicle and which detects at least one reference point of the other second or first vehicle by measurement techniques,

• wherein the sensor device has at least one transceiver unit, and on the at least one reference point there can be fastened a transponder, which reflects a radio signal of the transceiver unit,
• wherein the sensor device comprises an electronic controller,
• and the transceiver unit is situated on the first vehicle and the at least one transponder is situated on the second vehicle,
• wherein the electronic controller receives a signal regarding a height condition of an air suspension and calculates from a travel time of the radio signal a direct distance to the at least one transponder.