Measuring and testing – Vibration – Loose object detection
Reexamination Certificate
2008-05-16
2010-12-21
Surin, Jacques M Saint (Department: 2856)
Measuring and testing
Vibration
Loose object detection
C073S579000, C073S602000
Reexamination Certificate
active
07854167
ABSTRACT:
A diagnosis device for diagnosing loosening of a stator core of a rotary electrical machine. The diagnosis device has: excitation means for vibrating the stator core in the radial direction; vibration detection means for detecting the vibration of the stator core in the radial direction; means for frequency-analyzing an output signal of the vibration detection means that detects vibration generated in the stator core when the stator core is vibrated by the excitation means so as to extract a measurement natural vibration mode of the stator core in a circular ring natural vibration mode; means for estimating a circular ring natural vibration mode of the stator core from shape data of the stator core; and means for determining a clamping state of the stator core by comparing the measurement natural vibration mode and a determination criterion obtained based on the estimated natural vibration mode.
REFERENCES:
patent: 4425523 (1984-01-01), Detinko et al.
patent: 4663553 (1987-05-01), Zimmermann
patent: 4709182 (1987-11-01), Wenske et al.
patent: 4887474 (1989-12-01), Sargeant
patent: 4901572 (1990-02-01), Suyama
patent: 5295388 (1994-03-01), Fischer et al.
patent: 5493894 (1996-02-01), Dailey et al.
patent: 5615575 (1997-04-01), Goodwin
patent: 6924650 (2005-08-01), Haeusermann et al.
patent: 7741854 (2010-06-01), Humphries et al.
patent: 7743675 (2010-06-01), Moore
patent: 57-168977 (1982-10-01), None
patent: 59-061449 (1984-04-01), None
patent: 01-218338 (1989-08-01), None
patent: 10-082714 (1998-03-01), None
patent: 2000-354353 (2000-12-01), None
Huang Ge, “Discussions on Damage Detection of a Spatial Composite-Structure Beam Using Vibration Modal Parameters”, China Academic Journal Electronic Publishing House, May 2005, 11 pages (with English Translation).
Hashiba Yutaka
Ichimonji Masayuki
Katayama Hitoshi
Takahashi Masayuki
Takahashi Norio
Kabushiki Kaisha Toshiba
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Saint Surin Jacques M
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