Research on X-ray Non-Destructive Detection Method and System of Strips Density in Case

In order to take non-destructive detection for strips density in case, an X-ray non-destructive automatic detection system is established. Based on the principle of X-ray ionization radiation, when the X-ray interaction with the material, the phenomenon of scattering and photoelectric absorption occurs, the X-ray transmission intensity will be reduced. Through detecting the X-ray transmission intensity, the density of test material can be measured. The density of tobacco leaves in different location can be calculated by the different attenuation of X-ray. Through detecting the packing density of nine different points in case, the density variation rate can be calculated by statistics method. The experimental results show that the trueness of this method is 1.75%, the precision of this method for the packing density is 0.085 kg/m³, the absolute relative error is less than 5% when the packing density is larger than 200 kg/m³, and the error will decrease while the packing density increases, the accuracy of this method is higher than the method of sampling from 9 points. It can satisfy the system requirements of real time, non-destructive and higher precision.