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. 11, 2006
Filed:
Nov. 26, 2002
Shinichiro Arima, Kumamoto, JP;
Noboru Ueda, Kumamoto, JP;
Hideo Taira, Kumamoto, JP;
Yoshifumi Ohbuchi, Fukuoka, JP;
Ippei Torigoe, Kumamoto, JP;
Shinichiro Arima, Kumamoto, JP;
Noboru Ueda, Kumamoto, JP;
Hideo Taira, Kumamoto, JP;
Yoshifumi Ohbuchi, Fukuoka, JP;
Ippei Torigoe, Kumamoto, JP;
AIM Tech Co., Ltd., Kumamoto, JP;
Abstract
The invention provides a pressure measuring method and device that are capable of easily measuring the volume of a pipe that is an object of inspection and of eliminating the influences of a change in temperature in the pipe. A pressure measuring method using a pressure sensorconnected to a pipe for feeding a gas thorough a connecting portion for measuring the pressure in the pipe, the method being characterized in that the method comprises a pressurizing step for pressurizing the inside of the pipe by a pumpwith the pipe held in the closed state, and a step for measuring an amount of pressure change of the pipe in the standing state after completion of the pressurization step, and in that an amount of pressurization change of the in-pipe pressure by the pressurization step, and the flow rate of the gas fed into the pipe during pressurization are measured, and the volume of the pipe in the closed state is calculated on the basis of the amount of pressurization change and the flow rate of the gas, and the amount of leakage of the gas from the pipe is calculated on the basis of the volume of the pipe and the amount of pressure change in the standing state.