SENSOR ASSEMBLY

摘要

A sensor assembly includes a housing, a shield member, a magnetic field sensor, and a sensing magnet. The housing is configured to be mounted at least proximate to an electromagnetic coil that generates a first magnetic field to cause a movable component to move linearly along an axis based on the strength of the first magnetic field. The sensing magnet is configured to be coupled to the movable component to move therewith. The magnetic field sensor and the sensing magnet are disposed within a shielded chamber defined by the shield member, which is ferrous to shield the magnetic field sensor and sensing magnet from the first magnetic field. The magnetic field sensor detects an electrical characteristic responsive to a second magnetic field produced by the sensing magnet to monitor a position of the movable component along the axis.

主权项

1. A sensor assembly comprising:
a housing extending between a front and a rear, the housing configured to be mounted at least one of on or proximate to an electromagnetic coil configured to generate a first magnetic field to move a movable component linearly along an axis between an advanced position and a retracted position relative to the electromagnetic coil based on a strength of the first magnetic field; a shield member disposed within the housing, the shield member defining a shielded chamber; a sensing magnet configured to be coupled to the movable component such that the sensing magnet moves with the movable component, the sensing magnet disposed within the shielded chamber; and a magnetic field sensor disposed within the shielded chamber, the magnetic field sensor detecting an electrical characteristic responsive to a second magnetic field produced by the sensing magnet to monitor a position of the movable component along the axis, wherein the shield member is composed of a ferrous material to shield the magnetic field sensor and the sensing magnet from the first magnetic field generated by the electromagnetic coil.