Liquid measurement apparatus and method for measuring liquid

A liquid measurement apparatus for measuring an amount of liquid flowing from a measured object, the liquid measurement apparatus comprising:

• a passage member having a measurement passage being connected to the measured object at one end;
• a diaphragm provided in the measurement passage to partition the measurement passage into a measured-object side passage and an observation passage, the measured-object side passage being connected with the measured object and filled with test liquid, the diaphragm being configured to change in shape in accordance with change in amount of the test liquid in the measured-object side passage;
• and
• an analyzer,
• wherein the observation passage is filled with high-boiling liquid, which is substantially non-vaporizing at a measurement environment and contains a bubble, which is movable in the observation passage in accordance with change in shape of the diaphragm, and
• the analyzer is configured to calculate a travel distance of the bubble configured to and measure the amount of liquid flowing from the measured object based on the travel distance.

A liquid measurement apparatus for measuring an amount of liquid flowing from a measured object, the liquid measurement apparatus comprising:

• a passage member having a measurement passage being connected to the measured object at one end, the measurement passage being filled with liquid:
• a camera configured to successively photograph the measurement passage to obtain a plurality of measured images;
• and
• an analyzer,
• wherein the liquid filed in the measurement passage contains a bubble, which is movable in the measurement passage in accordance with change in amount of liquid in the measurement passage,
• the analyzer is configured to obtain positions of the bubble on at least three of the plurality of measured images,
• the analyzer is configured to perform a linear approximation of a relationship between elapsed time and the travel distance of the bubble from the obtained positions of the bubble thereby to calculate a unit-time travel distance of the bubble per unit time, and
• the analyzer is configured to measure the amount of liquid flowing from the measured object in a predetermined period based on the unit-time travel distance.