Patent ID: 8294455

Claim:
An arrangement for detecting a displacement of two parts in relation to one another, comprising: a monitoring chamber; a plurality of monitoring bodies in the monitoring chamber, wherein the plurality of monitoring bodies are of at least two types, wherein the types differ from one another based on a physical parameter; a motion transfer device to move the monitoring bodies from a first monitoring arrangement into a second monitoring arrangement if the two parts are returned to an initial state after changing the position of the two parts; a sensor device with sensors to generate a sensor signal corresponding to the physical parameter of the monitoring bodies in a first monitoring arrangement, and to generate a sensor signal corresponding to the physical parameter of the monitoring bodies in a second monitoring arrangement; and an evaluation device, wherein the sensor signal is transmitted to the evaluation device, wherein each monitoring body has a shape of a ball, wherein the monitoring chamber is formed by a cylinder chamber of a first annular cylinder closed on one side and by an end face of a second annular cylinder, wherein the second annular cylinder is displaceable in an axial direction in the cylinder chamber, and wherein the first annular cylinder and the second annular cylinder are connected, and wherein the balls are held in contact with each other based on a clamping force of a spring between the end face and a contact area at the first annular cylinder in the first monitoring arrangement and in the second monitoring arrangement.