Electricity: measuring and testing – Magnetic – Displacement
Reexamination Certificate
2006-12-05
2006-12-05
Patidar, Jay M. (Department: 2862)
Electricity: measuring and testing
Magnetic
Displacement
C324S207260, C324S229000
Reexamination Certificate
active
07145325
ABSTRACT:
Improving reducing or eliminating the effects of variation in characteristics of the resonance circuit in a resonance type displacement detection apparatus, so as to improve displacement detection accuracy. In a displacement detection system10, the resonance frequency range assumable by the resonance circuit21is estimated in advance, there is determined a drive frequency variation range f1–f2such that the estimated resonance frequency range is included therein, and by means of a variable oscillator30, drive frequency is repeatedly varied between the first frequency f1and the second frequency f2. Accordingly, where the resonance frequency of the resonance circuit21is fr1, when the drive frequency has changed to fr1, resonance voltage Vgl1may be obtained in the case of large gap G. Where the resonance frequency of the resonance circuit21is fr2, when the drive frequency has changed to fr2, resonance voltage Vgl2may be obtained in the case of large gap G.
REFERENCES:
patent: 4851770 (1989-07-01), Fiori, Jr.
patent: 5079502 (1992-01-01), Rogacki et al.
patent: 6208135 (2001-03-01), Shattil
patent: 0 169 633 (1986-01-01), None
patent: 2 394 295 (2004-04-01), None
patent: 56-107118 (1981-08-01), None
patent: 09-101106 (1997-04-01), None
patent: 11-030622 (1999-02-01), None
patent: 2001-281125 (2001-10-01), None
patent: 2003-298403 (2003-10-01), None
Hayashi Itsuki
Kano Mitsunari
Mori Akira
Nakabayashi Muneharu
Hitachi-Omron Terminal Solutions Corp.
McDermott Will & Emery LLP
Patidar Jay M.
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