The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 05, 2006
Filed:
May. 12, 2005
Mitsunari Kano, Seto, JP;
Akira Mori, Owariasahi, JP;
Itsuki Hayashi, Kasugai, JP;
Muneharu Nakabayashi, Toyohashi, JP;
Mitsunari Kano, Seto, JP;
Akira Mori, Owariasahi, JP;
Itsuki Hayashi, Kasugai, JP;
Muneharu Nakabayashi, Toyohashi, JP;
Hitachi-Omron Terminal Solutions, Corp., Tokyo, JP;
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 system, the resonance frequency range assumable by the resonance circuitis estimated in advance, there is determined a drive frequency variation range f–fsuch that the estimated resonance frequency range is included therein, and by means of a variable oscillator, drive frequency is repeatedly varied between the first frequency fand the second frequency f. Accordingly, where the resonance frequency of the resonance circuitis fr, when the drive frequency has changed to fr, resonance voltage Vglmay be obtained in the case of large gap G. Where the resonance frequency of the resonance circuitis fr, when the drive frequency has changed to fr, resonance voltage Vglmay be obtained in the case of large gap G.