Arrangement for making contactless distance measurements

An air spring for a motor vehicle having a chassis and wheels having respective axles, the air spring defining an axis of symmetry and comprising:

• a first part fixedly connected to said chassis;
• a second part fixedly connected to one of said axles;
• a flexible sleeve member connected between said first and second parts so as to roll on said second part as the vehicle moves over a roadway with said first and second parts being movable relative to each other causing the distance therebetween to vary and with said second part wobbling so as to move away from said axis of symmetry along a spatial curve because of at least one of said roadway and a load carried by said motor vehicle;
• a transmitter/receiver unit mounted on one of said parts off-center relative to said axis of symmetry and said transmitter/receiver unit defining a longitudinal axis inclined at an angle to said axis of symmetry and said transmitter/receiver unit being mounted at said angle so as to transmit energy signals along said longitudinal axis;
• and,
• a reflector component mounted on the other one of said parts and said reflector component defining a convexly formed reflecting surface aligned in a direction transverse to said longitudinal axis facing toward said transmitter/receiver unit so as to permit said convexly formed reflecting surface to reflect said energy signals back to said transmitter/receiver unit along said longitudinal axis irrespective of said wobbling of said second part relative to said axis of symmetry.