Vehicle wheel speed and acceleration sensor and method for...

Details Vehicle wheel speed and acceleration sensor and method for... Vehicle wheel speed and acceleration sensor and method for...

2008-07-29

2008-07-29

Lefkowitz, Edward (Department: 2855)

Electricity: measuring and testing

Electrical speed measuring

C324S207250

Reexamination Certificate

active

11512215

ABSTRACT:
Systems and/or methods for detecting a rotating wheel's speed and/or acceleration are provided. A sensor is attached to the rotating wheel. The sensor includes a circuit (e.g. a Wheatstone bridge circuit) having a plurality of resistors (e.g. 4 resistors). Each resistor includes a giant magnetoresistance (GMR) element and has a resistance changeable based at least in part on a change in magnetic field intensity with respect to an external magnetic field. The sensor generates a signal based at least in part on the resistors' resistances. A processor is operable to calculate the rotating wheel's speed and/or acceleration based at least in part on the signal.

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John P. Carini, “Circular Motion”, Oct. 13, 1999, http://carini.physics.indiana.edu/E105/circular.html.

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