Method and system for constructing road space-time load spectrum based on grating array

The invention discloses a method for constructing a road space-time load spectrum system based on a grating array, and the method comprises the following steps: laying a grating sensing array on a selected road, dividing the grating sensing array into a sensing unit in the transverse direction according to a lane width and in the longitudinal direction according to a fixed length, and coding each sensing unit; the grating array sensing array is used for sensing a vibration signal generated due to the change of the vehicle load; recording the timestamp of the load information of each sensing unit on each lane according to the sampling frequency of the grating, and performing classification according to the timestamps to form a data set; processing the data set, and dividing a statistical unit according to the sensing unit; scribing at any time, and calculating an accumulated load and an average load of each statistical unit in the time period; drawing a load spectrum of the load in each statistical unit changi