Magnetic Sensing Device

摘要

A magnetic sensing device including a U-shaped magnet with a pair of legs and a base defining a first interior channel and a distal plane. A sensor assembly in the first interior channel includes a sensor that extends above the distal plane. The magnet generates a first region of low or no flux above the distal plane in a first position of the magnet, a second region of low or no magnetic flux in the interior channel in a second position of the magnet, and a third region of magnetic flux above the distal plane in the second position of the magnet which causes the sensor to activate a control signal. The base includes steps and a second interior channel that opens into the first interior channel.

主权项

1. A magnetic sensing device for sensing h presence of a target of a magnetic material comprising:
a generally U-shaped magnet including a pair of spaced-apart legs and a base together defining a first interior channel and a distal plane; a sensor assembly located in the first interior channel and including a sensor extending above the distal plane of the magnet; and the magnet being adapted to generate a first region of low or no magnetic flux in the region of the sensor above the distal plane of the magnet in a first position of the magnet relative to the target, a second region of low or no magnetic flux in the interior channel of the magnet in a second position of the magnet relative to the target, and a third region of magnetic flux in the region of the sensor above the distal plane of the magnet in the second position of the magnet which causes the sensor to activate a control signal.