System for measuring relationship between fuel tank margin and liquid level height, and measuring method thereof

The invention provides a system for measuring the relationship between a fuel tank margin and a liquid level height, and a measuring method thereof, wherein, in the system for measuring the relationship between the fuel tank margin and the liquid level height, the opening at the lower end of a liquid tank is sequentially connected with a first valve, a first pump and a first flow meter through pipelines to the opening at the upper end of the fuel tank; the opening at the lower end of the fuel tank is connected to the opening at the lower end of a glass tube through a pipe to form a communicating vessels; the glass tube has a floating ball inside; the top end of the glass tube is provided with a height sensor for measuring the height of the floating ball; and the pipeline between the fuel tank and the glass tube is divided into a branch pipe to sequentially connect a second flow meter, a second pump, and a second valve to the opening at the upper end of the liquid tank. According to theinvention, the correspon