Tone wheel testing apparatus and its test method

Details Tone wheel testing apparatus and its test method Tone wheel testing apparatus and its test method

2006-07-11

2006-07-11

Tokar, Michael (Department: 2862)

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

C324S207250

Reexamination Certificate

active

07075291

ABSTRACT:
Tone wheel testing apparatus and the test method using the apparatus are disclosed. Tone wheel testing apparatus comprising a surface adjusting means for holding in the horizontal position an annular object to be tested to which a tone wheel is attached, the means comprising a pair of pressing members between which the object is held, and the one of the pressing members having a reference surface with which the tone wheel is contacted in order to make the tone wheel align in the rotary axis direction of the object, a rotatable chucking means for seizing the object so as to make the center of the object align with its rotary center when the object is held by the surface adjusting means, and a magnetic testing sensor disposed adjacent to the tone wheel of the object so as to face each other. According to which, the up and down appear on the tone wheel surface in the circumferential direction are corrected and the gap between the testing sensor and the tone wheel is accurately maintained, thereby enabling an appropriate setting arrangement of tone wheel for accurate measurement of the array pitch of each pole and the magnetic force.

REFERENCES:
patent: 6003375 (1999-12-01), Ouchi et al.
patent: 6217220 (2001-04-01), Ohkuma et al.
patent: 6414479 (2002-07-01), LaCroix et al.
patent: 6559633 (2003-05-01), Nachtigal et al.

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