Volume measuring apparatus and method

Details Volume measuring apparatus and method Volume measuring apparatus and method

1988-01-26

1989-12-19

Lall, Parshotam S.

Boots, shoes, and leggings

364558, 73149, 73 37, G01F 134, G01M 302

Patent

active

048887188

ABSTRACT:
A volume measuring apparatus comprises pair of tanks of substantially the same volume for supplying gas to a container to be measured and a refernce container, a pressurized gas source for filling the pair of tanks with gas under the same pressure, a volume adder for providing a known volume variation to either one of the container to be measured and the reference container, and a differential pressure detector for measuring the differential pressure between the container to be measured and the reference container. The ratio of the differential pressure variation to the volume variation, which represents the sensitivity for detecting differential pressure, is precalculated based on differential pressure variations obtained in the cases where the volume variation is provided and is not provided. A container desired to be measured is connected to a measuring side pneumatic system and the volume of the container to be measured is computed using the detection sensitivity and the differential pressure measured, with the gas in the pair of tanks being released into the container to be measured and the reference container.

REFERENCES:
patent: 4112738 (1978-12-01), Turner
patent: 4187715 (1980-02-01), Nevitt
patent: 4189936 (1980-02-01), Ellis
patent: 4675834 (1987-06-01), Furuse
patent: 4763518 (1988-08-01), Daviaud et al.
patent: 4840064 (1989-06-01), Fudim

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