Sensor module for detecting relative displacement and method...

Electricity: measuring and testing – Magnetic – Displacement

Reexamination Certificate

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C324S252000

Reexamination Certificate

active

07626380

ABSTRACT:
The present invention relates to a sensor module for detecting a relative displacement of an object having a groove pattern with alternately formed projection and depression, which comprises a magnet for generating a magnetic field; a giant magneto resistance (GMR) sensor installed between the magnet and the object to detect a variation in the magnetic field and output an electric signal; a signal processing part for processing the output signal from the GMR sensor to output a square wave; and a housing for supporting the magnet, the GMR sensor and the signal processing part, and a method of detecting a moving direction using the same.

REFERENCES:
patent: 6246234 (2001-06-01), Yokotani et al.

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