Equipment and method for online detection of impurity rate of sugar cane entering factory

The invention discloses on-line detection equipment and method for the impurity rate of sugar cane entering a factory. The method comprises the following steps: receiving a box of harvested materials through a material taking box; the weighed materials are weighed through a weighing mechanism, and the mass m1 of the materials before impurity removal is obtained; materials are poured into the hopper through the feeding mechanism; sugarcane roots are separated out through the first-stage vibrating screen; other materials penetrate through screen holes of the first-stage vibrating screen to fall down; light sugarcane leaves and soil are removed through a fan; after falling onto the second-stage vibrating screen, the silt or the stones penetrate through screen holes of the second-stage vibrating screen to be removed; the sugarcane subjected to impurity removal is weighed through a weighing mechanism, and the mass is m2 at the moment; weight data are collected through the terminal processing unit and uploaded to t