Device, container and method for measuring liquid volume in container based on pressure sensing

A method for measuring a liquid volume in a container based on pressure sensing, comprising the following steps:

• S10, forming a sealed space in the container through a compression member;
• a pressure sensor and a force transmission member are arranged on the compression member, the force transmission member converts an air pressure in a sealed space into pressure applied to the pressure sensor, and an area value of a stress surface is a determined value;
• the pressure sensor detects the pressure value from the force transmission member before and after compression;
• S20, compressing the air in the sealed space through movement of the compression member relative to the container;
• S30, obtaining a liquid quantity detection parameter, comprising an air pressure value in the sealed space before compression, a pressure value detected by the pressure sensor before compression, a pressure value detected by the pressure sensor after the compression, an area value of the stress surface of the force transmission member, a volume value of the compressed air in the container, and a volume value of the container;
• and
• S40, acquiring the liquid volume in the container by using the liquid quantity detection parameter.