MAGNETIC TRANSDUCER AND PROXIMITY DETECTION DEVICE INCORPORATING SUCH A TRANSDUCER

摘要

A magnetic transducer utilizes the magnetostrictive effect for creating an easy axis of magnetization in the longitudinal axis of a magnetic wire having a high cobalt content by bending said wire, which is then placed in a non-magnetic hollow tube within which the two ends of the wire engage with one another; this tube is placed in the axis of a detection coil and the application of a magnetic field, alternately in one direction and the other in the longitudinal axis of the assembly creates a flux variation due to the magnetization change in the easy axis; the pulses detected have a high amplitude and a low rise time; such a magnetic transducer can be used, more particularly for proximity transducers for elements in translation or in rotation, for example for motors.