Electricity: measuring and testing – Magnetic – Displacement
Reexamination Certificate
2007-07-20
2009-12-01
Aurora, Reena (Department: 2858)
Electricity: measuring and testing
Magnetic
Displacement
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.
Cho Bong-Geun
Lee Dong-Rak
Moon Hyoung-Jun
Park Jae-Woo
Aurora Reena
Duane Morris LLP
S & T Daewoo Co., Ltd.
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