Non-oriented gear tooth sensor using a Hall cell.

摘要

A non-oriented direct coupled sensor (26o for gear teeth or similarly shaped discontinuities of a ferromagnetic target uses a single magnet (30) and a direct coupled Hall cell integrated circuit (34) to detect the presence or absence of gear teeth. The sensor (26) incorporates techniques for flux steering and flux reversals independent of the orientation of the sensor to the target to overcome the operate or release point of a Hall switch, latch or other device. The use of spaced apart, offset flux concentrators (32a, 32b) provides a sensitive device with favorable tolerances in temperature and air gap.