VESSEL VOLUME MEASUREMENT METHOD, AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2013 - IPC G01F17/00 

FIELD: measurement equipment.

SUBSTANCE: volume of a vessel is changed by value ΔV and change of gas pressure in the vessel is determined before and after the volume change, on the basis of which desired vessel volume V₀ is determined. First, pressure is levelled in a tightly closed vessel with environment. Volume of the vessel is changed by movement of the rod by value ΔV₁ and pressure ΔP₁ is measured inside the vessel in relation to environment. Then it shall be proved that it is not changed as time goes on. Volume of the vessel is changed by value ΔV, pressure in the vessel is levelled with the environment, volume of the vessel is changed again by value ΔV₂, pressure ΔP₂ is measured inside the vessel in relation to environment, and it shall be proved again that it will not change with the course of time. Desired vessel volume Vo is determined by the following formula: V₀=(ΔV·k·ΔP₂/ΔV₂)/(ΔP₂/ΔV₂-ΔP₁/ΔV₁), where: k=1 if the vessel volume is decreased and k=-1 if it is increased. A vessel volume measuring device includes a thin-wall cover plate in which a hole is made. In the hole there installed is an O-ring and a cylindrical rod having the possibility of its rotation and axial movement of its cylindrical part in lower part of the hole. In the cover plate there is the first through channel and the second through channel, the inputs of which are located on inner side of the cover plate. A rod turning device through the specified angle and a shutoff angle shutting off the connection of the first channel to atmosphere are installed on the cover plate. The first input of a differential pressure sensor is connected to output of the second channel, its second input is interconnected with atmosphere, and its output and output of the turning device are connected to a volume calculation device.

EFFECT: improving measurement accuracy of vessel volume.

3 cl, 1 dwg