Multi-wavelength detection device and detection method for smoothness of high-speed railway track

The invention belongs to the filed of railway track detection, and relates to improvement of a multi-wavelength detection device and detection method for non-smoothness of a track. The detection device provided by the invention comprises a track inspection van provided with a detection platform [15], wherein the upper surface of the detection platform [15] is equipped with a data processing system comprising a computer, shifters, a shift data acquisition card [5], an OD (origin destination) data acquisition card [6] and a power supply. The detection device is characterized in that the shifters are laser shifters, a detection beam [16] is internally provided with two laser shifters, and the upper surface of the detection platform [15] is equipped with an altitude measurement system. The detection method comprises the following steps: sensor data acquisition and storage, data preprocessing and comprehensive data acquisition. By the adoption of the detection device and the detection method disclosed by the invention, the time of working on the track can be greatly shortened and work efficiency is improved, and the measurement requirements of non-smoothness of a high-speed railway for long waves longer than 100 meters are met.