Rail corrugation detection method and device

The invention provides a rail corrugation detection method and device. The method comprises steps of carrying out the integral calculation of an initial vehicle speed set, and obtaining a first mileage set; based on the three-dimensional coordinate set, correcting the first mileage set and the initial vehicle speed set to obtain a third mileage set and a first vehicle speed set; performing data fusion on the initial vehicle body vertical acceleration set, the initial vehicle body transverse acceleration set and the initial noise set according to the first vehicle speed set and the vehicle body head shaking angular velocity set, and calculating a rail corrugation evaluation index; according to the third mileage set and the steel rail corrugation evaluation index, calculating a steel rail corrugation characteristic coefficient, and judging a suspected steel rail corrugation section; and calculating a periodic characteristic coefficient according to the third mileage set and the initial vehicle body vertical acc