GF32.50-P-4600-03A Plunger Travel Sensor, Function

GF32.50-P-4600-03A Plunger travel sensor, function
- with CODE (487) Active body control (ABC)

Component Identification:

A wire, known as a wave conductor (a), is enclosed by a moving position magnet (f). The position to be measured is marked by the current position of the position magnet. The position magnet generates a magnetic longitudinal field (b) at its position in the wave conductor. The necessitates that all the materials which are located between the magnet and the wave conductor (piston rod), are non-magnetizable.

For the measurement, a short current pulse (e) is sent through the wave conductor. This produces a second magnetic field (c) radially around the wave conductor. A new magnetizing direction is produced at the location of the position magnet from the superposition of the longitudinal magnetic field (of the position magnet) and of the radial magnetic field (of the current pulse) which is positioned perpendicular to it.

This results in a short-time distortion of the wave conductor which triggers a torsion pulse (d).

The torsion pulse runs in the form of an oscillation wave with a fixed propagation rate to the end of the wave conductor where a receiver (g) for torsion waves is located. The position of the magnet is determined from the propagation time of the torsion wave between the exciting current pulse and the receiver pulse. The torsion pulse converter supplies the result of the measurement in the form of an electric signal to the ABC control module.