Tubular wheel speed sensor

Details Tubular wheel speed sensor Tubular wheel speed sensor

G - Physics

01

P

64/21, 341/73.4,

G01P 3/44 (2006.01) B60T 1/06 (2006.01) B60T 8/171 (2006.01) G01P 3/488 (2006.01) H02K 21/38 (2006.01)

Patent

CA 1063698

ABSTRACT OF THE DISCLOSURE A rotation indication system having an improved sensing device for determining the velocity of a rotating body is disclosed. The improved sensing device is tubular in configuration and includes a source of magnetic flux and two pole pieces that define a split magnetic field. The sensing device is mounted in close proximity to a rotor which is connected to the rotating body. The rotor has apertures which interrupt the split magnetic field producing an output signal with a frequency proportional to the velocity of the rotating body. The sensing device is oriented relative to the rotor apertures so that each pole piece is alternatively in register with an aperture to produce the desired output signal. Since the sensing device is tubular in shape, it can be rotated about its axis to obtain the desired orientation with the rotor apertures, thus permitting the use of the sensing device with a wide range of rotor diameters having various aperture spacings.

223775

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