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:
Jan. 19, 2010
Filed:
Sep. 25, 2007
Takumi Hashizume, Chiba, JP;
Tetsuya Wakui, Osaka, JP;
Jyun-ichi Eino, Tokyo, JP;
Nobuo Miyaji, Tokyo, JP;
Yoshitaka Yuki, Tokyo, JP;
Takumi Hashizume, Chiba, JP;
Tetsuya Wakui, Osaka, JP;
Jyun-ichi Eino, Tokyo, JP;
Nobuo Miyaji, Tokyo, JP;
Yoshitaka Yuki, Tokyo, JP;
Yokogawa Electric Corporation, Tokyo, JP;
Abstract
An impulse line-clogging detecting apparatus. The apparatus is provide with: a differential pressure detecting unit that detects a differential pressure of a fluid, and outputs time-series data of the differential pressure. Fluctuations are determined by a differential pressure fluctuation calculating unit that calculates a differential pressure fluctuation, and a fluctuation variance calculating unit that calculates a variance of the differential pressure fluctuation. Based upon the calculated variance, a variance ratio calculating unit calculates a variance ratio of the differential pressure fluctuation variance to a differential pressure fluctuation variance obtained in advance in a normal state of the high and low pressure side impulse lines. A variance ratio correcting unit calculates a correction value for suppressing a change of the variance ratio. Finally; a clogging determining unit determines whether the high and low pressure side impulse lines are clogged, based on the variance ratio corrected by the variance ratio correcting unit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile