Rion Company Ltd.

Aim Tech Co., Ltd.

Kukamoto University

Munehiro Date

Kumamoto University

Date, Munehiro

Ippei Torigoe

Takashi Segami

Noboru Ueda

Hideo Taira

Shinichiro Arima

Yoshifumi Ohbuchi

An acoustic capacity measurement method for finding capacity of a container or object by removing effect of the surface area without using an approximate expression of acoustic impedance is provided. The acoustic capacity measurement method for finding capacity of a container includes a pressure change ratio calculating step, a rotation step, an oblique coordinate transformation step, and a capacity calculating step.

Acoustic capacity, volume, and surface area measurement method

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.

Pressure measuring method and device

Growing community of inventors

Kumamoto, Japan

Ippei Torigoe