Magnetic sensor with rectangular field distorting flux bar
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United States of America Patent
Stats
-
Aug 20, 1991
Grant Date -
N/A
app pub date -
Nov 16, 1989
filing date -
Nov 16, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A magnetic sensor for use in measuring the position, velocity, and/or direction of movement of an object having alternating zones of magnetic conductivity with a permanent magnet member having a pole face facing the moving object and having an axis transverse to the direction of movement thereof. A ferromagnetic strip of high permeability is mounted on the face of the magnet coaxial therewith having a length dimension in the direction of movement of the object greater than the width dimension transverse to the direction of movement. The ferromagnetic strip distorts the field of the permanent magnetic member in the area of a pair of the sensor elements such that the flux lines in the area of each of the sensors are urged toward a transverse direction relative to the direction of movement of the object, whereby the flux field in the area of each of the sensor is uniform.
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