Research on system of liquid automatic filling

This paper introduced a design of liquid automatic filling system, and shed light on the working principle and hardware structure of the system. The paper focused on analyzing principle and method of how to use temperature measurement circuit and the ultrasonic technology to detect flowing liquid. And it discussed what caused the mistakes which occurred in Packaging film transmission and Ultrasonic Flow Detection. This system has the function of real-time flow detection, temperature regulation, automatic transmission of Packaging film, parameter setting and displaying. The system has a extensive social practical value.