Linear displacement transducer for strain gauge applications - has meander-type pick=up and transformer coils to detect relative movement

摘要

The linear transducer is esp. suitable for use with strain gauges and is designed to improve the measurement of small displacements at high temps. and under vibration conditions. It comprises a pick-up winding (1) whose turns are wound around a lower former, and two transformer windings (2, 3) wound on an upper former, these windings being in the shape of zig-zags. The side windings (1, 2, 3) are essentially at right-angles to the main coil (4) so that the inductive coupling between the auxiliary sections (6) of the individual coils is minimal. The ends of the pick-up winding (9) and those of the transformer windings (8) are on opposite faces of the transducer. The output signal from the transducer is practically linear in relation to displacement.