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:
Apr. 22, 2014
Filed:
Sep. 12, 2008
Masanobu Watanabe, Kanagawa-Ken, JP;
Yasumi Kitajima, Tokyo, JP;
Tsuyoshi Hagiwara, Kanagawa-Ken, JP;
Masahiko Warashina, Kanagawa-Ken, JP;
Mieko Sato, Kanagawa-Ken, JP;
Masanobu Watanabe, Kanagawa-Ken, JP;
Yasumi Kitajima, Tokyo, JP;
Michio Sato, Kanagawa-Ken, JP;
Tsuyoshi Hagiwara, Kanagawa-Ken, JP;
Masahiko Warashina, Kanagawa-Ken, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
The present invention provides a vibration monitoring apparatus that monitors vibration of a jet pump disposed in a reactor pressure vessel using ultrasonic wave, including: an ultrasonic sensor that is attached to an outside the reactor pressure vessel, and transmits and receives ultrasonic wave; a reflector that is mounted on a surface of a riser pipe of the jet pump, and includes a planar reflecting surface that can reflect ultrasonic wave; and a signal processing unit that performs signal processing of the ultrasonic wave transmitted by the ultrasonic sensor, reflected by the reflecting surface of the reflector, and received by the ultrasonic sensor, and measures a vibration amplitude of the riser pipe and calculates a vibration waveform.