Rotation speed sensor

Details Rotation speed sensor Rotation speed sensor

1998-08-25

2000-08-15

Moller, Richard A.

Measuring and testing

Speed, velocity, or acceleration

Magnetic speed measuring or mechanical speed measuring with...

324168, 324174, G01P 300

Patent

active

061018791

ABSTRACT:
In the present invention, a detection coil and a cancellation coil are closely provided and electrically connected in series to cancel induction noise. The cancellation coil may be disposed at a position not to sense the rotation. An axis of the cancellation coil may be provided in parallel to an axis of the detection coil. The numbers of turns for the cancellation coil may be the same as those for the detection coils. The cancellation coil may be disposed coaxial to the detection coils.

REFERENCES:
patent: 5744720 (1998-04-01), Ouchi
patent: 5905375 (1999-05-01), Shirai et al.

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