Abstract: A distance detecting device for detecting a distance from objects with the use of wave signals determined by the distance measuring device and reflected from the objects, the distance detecting device comprising transmitter/receiver means for transmitting and receiving of wave signals with at least a first and a second transmitting/receiving unit which are spatially spaced from one another, with the first unit performing at least one transmitting functions and a second unit performing at least one receiving function, the both units being formed so that the second unit can receive wave signals emitted by the first unit as response signals, and either the function unit or the second unit can receive the wave signals emitted by the first unit as reflection signals, an interference determining device for determining at least one characteristic parameter of the response signal received in the second unit and for determining an interference based on the determined characteristic parameter.

Abstract: An arrangement for detecting the presence of an obstacle in the vicinity of an object includes art least one transmitter that emits a pulsed signal from a predetermined location of the object, at least two receivers capable of receiving echoes of such a pulsed signal as reflected from the obstacle each at a different location of the object, and an evaluating device that measures respective time intervals elapsing between the emission of the pulsed signal and the receipt of the respective echo by the associated receiver.