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:
Aug. 23, 2016
Filed:
Dec. 24, 2010
Tomoya Sakaguchi, Kuwana, JP;
Nobuyuki Ninoyu, Shanghai, CN;
Junichi Hirata, Iwata, JP;
Yasuhiko Sakakibara, Iwata, JP;
Tomoya Sakaguchi, Kuwana, JP;
Nobuyuki Ninoyu, Shanghai, CN;
Junichi Hirata, Iwata, JP;
Yasuhiko Sakakibara, Iwata, JP;
NTN CORPORATION, Osaka, JP;
Abstract
An effective value operation unit calculates an effective value of a vibration waveform of a bearing, the vibration waveform being measured by using a vibration sensor. An envelope processing unit performs envelope processing on the vibration waveform measured by using the vibration sensor, thereby generating an envelope waveform of the vibration waveform. An effective value operation unit calculates an effective value of an AC component of the envelope waveform generated by the envelope processing unit. A diagnostic unit diagnoses an abnormality of the bearing based on the effective value of the vibration waveform calculated by the effective value operation unit and the effective value of the AC component of the envelope waveform calculated by the effective value operation unit.