Device to detect seat belt buckle status

Details Device to detect seat belt buckle status Device to detect seat belt buckle status

1998-04-24

2000-06-27

Dickson, Paul N.

Land vehicles

Wheeled

Attachment

180268, 24633, B60R 2200

Patent

active

060797444

ABSTRACT:
A seat belt buckle and latch indicating system employs a seat belt buckle with a Giant Magnetoresistive (GMR) sensor spaced from a magnet above a gap through which a ferromagnetic latch protrudes. The latch may reside at three distinct positions: unlatched, latched, and latched without the presence of a hasp. The latch functions as a magnetic field concentrator with the result that the sensed magnetic field is dependent on latch position. The GMR sensor provides a signal indicating the sensor is working at all times, and provides specific information based on physical positioning of the critical components of the belt and which indicates that the buckle is mated to the seat belt hasp.

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