Abstract: An improved magnetic sensor for use in measuring the position, velocity and/or direction of movement of an object having alternating zones of different magnetic conductivity in the direction of movement, comprises a permanent magnet member having a pole face facing the moving object and having an axis transverse to the direction of movement thereof. A pair of sensor elements are mounted on the permanent magnet pole face, one on each of the opposite sides of the magnet axis in the direction of movement of the object. A laminated flux bar having strips of ferromagnetic material of high permeability and strips of ceramic material having low permeability is mounted on the pair of sensor elements.

Abstract: An improved magnetic sensor for use in measuring the position, velocity and/or direction of movement of an object having alternating zones of different magnetic conductivity in the direction of movement, comprises a permanent magnet member having a pole face facing the moving object and having an axis transverse to the direction of movement thereof. A pair of sensor elements are mounted on the permanent magnet pole face, one on each of the opposite sides of the magnet axis in the direction of movement of the object. A laminated flux bar having strips of ferromagnetic material of high permeability and strips of ceramic material having low permeability is mounted on the pair of sensor elements.

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.

Abstract: An improved magnetic sensor for use in measuring the position, velocity and/or direction of movement of an object having alternating zones in the direction of movement of different magnetic conductivity comprises 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 and has a length dimension in the direction of movement of the object which is greater than the width dimension transverse to the direction of movement. A pair of sensor elements are mounted on the ferromagnetic strip, one on each of the opposite sides of the magnet axis in the direction of movement of the object.