Simulation test method, device, equipment and system for steel rail inspection

The invention discloses a simulation test method, device, equipment and system for steel rail inspection, and is applied to the technical field of train testing, a processor is connected with a line-scan digital camera, the line-scan digital camera is used for shooting a linear array comprising N indicator lights, and the processor is used for determining a steel rail image and a speed curve; k pixel rows of the steel rail image are sequentially selected, and the switching frequency when the pixel rows are switched is the switching frequency determined based on the speed and is the same as the frequency for sending the row trigger signal; when the ith pixel row is selected, brightness control of corresponding N indicating lamps is carried out through a driving circuit according to N pixel gray values in the row, and a row trigger signal is sent to the line-scan digital camera for one time at the same time; and after the K pixel rows are selected, outputting a frame of shot image through the linear array camer