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:
Jul. 29, 2008
Filed:
Mar. 22, 2007
Takumi Hashizume, Chiba-shi, Chiba-ken, JP;
Tetsuya Wakui, Sakai, Osaka, JP;
Jyun-ichi Eino, Tokyo, JP;
Nobuo Miyaji, Tokyo, JP;
Takumi Hashizume, Chiba-shi, Chiba-ken, JP;
Tetsuya Wakui, Sakai, Osaka, JP;
Jyun-ichi Eino, Tokyo, JP;
Nobuo Miyaji, Tokyo, JP;
Yokogawa Electric Corporation, Tokyo, JP;
Other;
Abstract
A detecting apparatus includes the following units. A pressure detecting unit detects in time series higher and lower static pressures and a differential pressure. Fluctuation calculating units calculate time series data sets of a differential pressure fluctuation, a higher static pressure fluctuation, and a lower static pressure fluctuation. Square sum calculating units calculate the square sum of the time series data sets of the differential pressure fluctuation, the square sum of the time series data sets of the higher static pressure fluctuation, and the square sum of the time series data sets of the lower static pressure fluctuation. A correlation coefficient calculating unit calculates first and second correlation coefficients. An intermediate variable calculating unit calculates an intermediate variable. A blockage rate calculating unit calculates a blockage rate. A determination unit determines a blockage of higher and lower pressure impulse lines with reference to the blockage rate.