Method and device for characterizing density deviation rate of tobacco lamina in gridding box

The embodiment of the invention provides a method and device for characterizing density deviation rate of tobacco lamina in a gridding box. The method comprises the steps: calculating a sample microwave signal value of a sample tobacco lamina box through a microwave method; acquiring corresponding density value detection methods according to the different types of sample tobacco lamina boxes to obtain sample density values corresponding to the different types of sample tobacco lamina boxes; establishing a density value prediction model according to the sample microwave signal value and the sample density value; obtaining a finished product tobacco lamina box, carrying out grid division, and obtaining a finished product microwave signal value of each grid; obtaining a finished product density value of each grid in combination with the density prediction model, and calculating a tobacco lamina density deviation rate according to the finished product density value; and performing quality evaluation on the finish