Device for the contact free determination of the position of a mechanical moving part relative to its surroundings, especially a piston or valve member, has a radio receiver attached to the piston and fixed radio transmitters

摘要

The moving part (10) has a radio receiver (12) attached for receiving the signal transmitted by two radio transmitters (15, 16), which are fixed during the measurement process relative to the remaining mechanical arrangement (11). An analysis device (17) determines the position and or angular position of the receiver and therefore the moving part relative to the two transmitters. The receiver is combined with a transmitter (10) in a transmitter receiver unit (13).