| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method and a device for measuring fluid pressure within a pressure container, which make it possible, with a simple configuration, to measure the pressure of the liquid encapsulated in the pressure container with high accuracy. <P>SOLUTION: The method includes: a process of supplying liquid into a liquid chamber at a fixed flow rate and of measuring pressure of the liquid supplied into the liquid chamber, when the liquid chamber and a gas chamber are provided within an accumulator 100, separated by a partition wall; a process of memorizing the relations between the lapsed time and the measured value; a process of deriving a first approximate equation with the use of a plurality of data within a certain range before reaching an inflection point at which an increase gradient of the liquid pressure relative to the lapsed time changes rapidly, out of all the memorized relations; a process of deriving a second approximate equation with the use of a plurality of data within a certain range after reaching the inflection point; and a process of calculating an intersection point of the first approximate equation and the second approximate equation and determining the pressure at the intersection point as pressure of the liquid when liquid is not supplied. <P>COPYRIGHT: (C)2012,JPO&INPIT |
