Cigarette quality on-line detection device and detection method based on machine vision

The invention provides a cigarette quality on-line detection device and a detection method based on machine vision. The detection device comprises a light path detecting unit, an image information processing unit, a control unit and an executing mechanism. The detection method comprises the steps as follows: a white LED light source emits illuminating beams through an optical component, the illuminating beams penetrates through a piece of shielding glass to irradiate on a cigarette advancing at a high speed, and a reflected light generated on the cigarette is focused on the target surface of a high-speed CCD (charge coupled device) line-scan camera through a reflecting mirror and a lens; image information is converted into digital signals through an A/D sampling module and transmitted to the image information processing unit so as to enable the quality of every cigarette to be judged; and the analysis result is transmitted to an upper controller and a PLC ( Programmable Logic Controller) through a CAN bus network, so that defective cigarettes are counted and tracked and then are removed. The cigarette quality online detection device and the detection method can remove unaccepted products on line accurately and deliver qualified products to downstream equipment, thereby greatly improving finished product qualification rate and production rate of a whole production line.