Volume measurement device based on dynamic differential pressure attenuation

The invention introduces a new device for measuring volume by combining dynamic differential pressure attenuation with anodic aluminum oxide (AAO) leak, and aims to make the volume measurement of a metal container have the characteristics of high accuracy, high efficiency, simplicity, convenience and feasibility. The device comprises an air charging device, a first valve, a container under test, an AAO leak, a second valve, a differential pressure transmitter and a vacuum pump unit, wherein the vacuum pump unit pumps air to keep a low pressure end of the AAO leak at 0Pa; the air charging device inflates a system, and the flow conductivity remains unchanged when gas passes through the AAO leak; and the differential pressure transmitter is used for measuring the differential pressure betweentwo ends of the AAO leak, and performing exponential function fitting on the change of the differential pressure between the two ends in order to calculate the volume of the container under test. 本发明介绍了种利用动态差压衰减与阳极多孔氧化铝(AAO)