Welding depth estimation system based on real-time tracking of moving interface

The utility model discloses a welding depth estimation system based on real-time tracking of a moving interface, which comprises a welding state detecting unit, a data storage unit, a parameter input unit, a processor and a display. The welding state detecting unit is arranged at the bottom of a welded position of a welded workpiece; relational models of solid-liquid phase change interface positions and corresponding welding state detecting parameters during welding of various welding materials are stored in the data storage unit; the parameter input unit is used for inputting welded workpiece materials and setting control parameters; the processor is used for analyzing and processing information detected by the welding state detecting unit according to information inputted by the parameter input unit and data stored in the data storage unit, and used for tracking the solid-liquid phase change interface positions of the welded workpiece in real time; the display is connected with the processor; and the weldin