Patent ID: 7353692
Filing Date: 2008-04-08
Classification: A61B,G01M

Abstract:
1. A leakage tester, comprising: a pressurizing apparatus for pressurizing a measurement object by introducing gas into the measurement object; a pressurization control section for controlling the pressurizing operation by the pressurizing apparatus such that the pressuring apparatus performs a first pressurizing operation to stop pressurizing before reaching a predetermined pressure after starting pressurizing and a second pressurizing operation to stop pressurizing after pressurized until reaching the predetermined pressure after the first pressurizing operation; a pressure detecting section for detecting the pressure in the measurement object, the pressure detecting section detecting at least the pressure value in the measurement object when the first pressurizing operation is stopped and the value of pressure change in the measurement object after the second pressurizing operation is stopped; a volume estimating section for estimating the volume of the measurement object based on the pressurizing amount of the first pressurizing operation and the pressure value when the pressurizing operation is stopped; and a leak determination section for determining the leakage state of the measurement object based on the pressure change information obtained in accordance with the volume of the measurement object estimated by the volume estimating section and the amount of pressure change detected by the pressure detecting section after the second pressurizing operation is stopped.