Train track seam width detection method and device and medium

The invention discloses a rail gap width detection method and device for a train rail and a medium, and is applied to the technical field of low-speed maglev train suspension control. The method comprises the following steps: acquiring vertical suspension characteristic values at different positions of a train track through an eddy current type displacement sensor when the train runs; then determining the suspension gap value of the rail gap and the suspension height of the eddy current displacement sensor according to the obtained suspension characteristic values, and finally determining the rail gap width result of the train rail according to the corresponding relation between the suspension gap value, the suspension height and the rail gap width. Wherein the corresponding relation is established according to the historical suspension gap value data, the historical suspension height data and the corresponding historical rail gap width data. By means of the scheme, rail gap width detection can be completed i