Model surface real-time monitoring device and method for electric arc heating conduit test

The invention relates to the technical field of arc heating test, in particular to a model surface real-time monitoring device for arc heating conduit test, which comprises a rectangular spray pipe, a conduit and a to-be-tested model, the conduit is arranged on one side of the rectangular spray pipe and is communicated with the rectangular spray pipe, and the to-be-tested model is arranged on the upper part of the conduit. The guide pipe is fixed through the model pressing block, and an endoscope module and a cooling module used for cooling the endoscope module are arranged at the bottom of the guide pipe. Through the synergistic effect of the cooling module and the endoscope module, the high-temperature-resistant endoscope module is used for achieving clear imaging of the surface of a model in a narrow area under the high-temperature and high-pressure conditions. The cooling module forms a protective gas film on the surface of the endoscope module, baking of high-temperature airflow and scouring of various i