Wind direction division-based railway crosswind early warning system and crosswind strength calculation method

The invention discloses a wind direction division-based railway crosswind early warning system and a crosswind strength calculation method. The system includes a data collection unit, a quality control unit, a detection unit, and an alarm unit. The data collection unit collects wind speed and direction data. A positioning module obtains a geographic position of a current station and invokes a topographic feature database, and then sends data to the data quality control unit. The data quality control unit compares and analyzes the data with a numerical interval of a meteorological element thathas appeared in history of the station and meteorological data of a neighboring station, and deletes invalid data and corrects erroneous data, and data calculated by the data quality control unit is finally transmitted to the detection unit and compared with a preset threshold. Finally, a control instruction is delivered to the alarm unit. The system provided in the invention can assist in surveying and mapping meteorolog