Title:
METHOD AND APPARATUS FOR DIAGNOSING BUSHING
Document Type and Number:
WIPO Patent Application WO/2011/108391
Kind Code:
A1
Abstract:
Disclosed are a method and an apparatus for diagnosing bushing, in which even minor signs of abnormal rubbing of a bushing in a diesel engine are accurately detected. Waveform data indicating acceleration of vibration generated during operation of a bushing are detected. The acceleration waveform data are converted into a frequency-domain acceleration spectrum by means of Fourier transformation. Information on a plurality of peaks generated in the frequency-domain acceleration spectrum by a rotational frequency interval of a shaft being measured is quantified by performing predetermined signal processing combined with rotational frequency information of the shaft. A characteristic value is obtained and monitoring is performed as to whether the characteristic value obtained is greater than a predetermined threshold value. It is determined that an abnormality has occurred in the bushing if the characteristic value is greater than the threshold value.
Inventors:
SAKO, Takashi (1-105, Kanda Jinbocho Chiyoda-k, Tokyo 01, 〒1018101, JP)
迫 孝司 (〒01 東京都千代田区神田神保町一丁目１０５番地 Tokyo, 〒1018101, JP)
迫 孝司 (〒01 東京都千代田区神田神保町一丁目１０５番地 Tokyo, 〒1018101, JP)
Application Number:
JP2011/053734
Publication Date:
September 09, 2011
Filing Date:
February 21, 2011
Export Citation:
Assignee:
Asahi Kasei Engineering Corporation (3-23, Nakanoshima 3-chome Kita-ku, Osaka-sh, Osaka 05, 〒5308205, JP)
旭化成エンジニアリング株式会社 (〒05 大阪府大阪市北区中之島三丁目３番２３号 Osaka, 〒5308205, JP)
SAKO, Takashi (1-105, Kanda Jinbocho Chiyoda-k, Tokyo 01, 〒1018101, JP)
旭化成エンジニアリング株式会社 (〒05 大阪府大阪市北区中之島三丁目３番２３号 Osaka, 〒5308205, JP)
SAKO, Takashi (1-105, Kanda Jinbocho Chiyoda-k, Tokyo 01, 〒1018101, JP)
International Classes:
G01H17/00
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (TMI ASSOCIATES, 23rd Floor Roppongi Hills Mori Tower, 6-10-1, Roppongi, Minato-k, Tokyo 23, 〒1066123, JP)
Claims: