Saturable core proximity sensor including a flux director and a

Details Saturable core proximity sensor including a flux director and a Saturable core proximity sensor including a flux director and a

1992-09-11

1994-09-27

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Displacement

32420712, 32420716, 32420726, 324253, G01B 714

Patent

active

053510046

ABSTRACT:
A variable reluctance saturable core proximity sensor assembly comprising a target and a sensor. The target consists of a magnet having a high field strength, a base plate having a high relative permeability, and a nonmagnetic metal housing surrounding the magnet and base plate. The sensor consists of a core made from a material having a high relative permeability, a coil surrounding the core and a housing made from a nonmagnetic material surrounding the core and coil. At its distal end of the core is a flux director that intercepts the magnetic field produced by the target. The flux director comprises a plurality of radially extending arms having the same permeability as the core. The flux director has a cross-sectional area selected so that the flux director and core saturate at substantially the same time. The sensor assembly may be used in either a slide-by or head-on mode.

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