A dark cold table, cryogenic laser shock test system and control method

The present invention provides a cryogenic stage, the experimental system and control method for laser shock peening cryogenic adjusted tapered gap using electromagnetic theory to precisely control the volume of vaporized liquid nitrogen, and further adjusting the amount of heat absorbed by the liquid nitrogen vaporized precisely control stage cryogenic temperature and a sample surface, effectively expanding cryogenic temperature adjustment range of laser shock test system, and l / cooling speed, and closed-loop control in combination improve the control precision of the surface temperature of the sample. Further, the present invention implements intelligent control cryogenic laser shock peening process by the computer and PLC control unit, reducing the amount of liquid nitrogen during the experiment and improve the processing efficiency.