Throughout the market development, the replacement of manual inspection by machine vision inspection system will be an inevitable trend of the modernization process. The machine vision inspection system has high detection accuracy, can quickly acquire a large amount of information and is automatically processed. Therefore, this technology is widely used in the field of industrial inspection.
Since the reform and opening up 30 years ago, industrial production has become more and more demanding for testing, and cost input has gradually increased. Traditional contact testing has been unable to meet the requirements of customers, and it has not been able to guarantee product quality. Such demand and environment have promoted the development of domestic machine vision technology, and more and more industrial inspection projects have begun to adopt non-contact optical, mechanical, electrical, visual, chemical and other comprehensive technical means. The following will give you an example of the application of key technologies in machine vision in tobacco debris removal systems.
From the production line entering the cigarette factory to the production process of finished cigarettes, the tobacco leaves have gradually detached from artificial assistance. Especially after the leaves are changed into leaves, there is no artificial leaf-laying process, so the sundries mixed in the tobacco leaves And moldy tobacco leaves can not be removed. They have a greater impact on the quality of cigarette products. The tobacco debris removal device is a system for removing debris and mildewed tobacco leaves using a wire-making production line for the processing of the leaves of the leaves, the leaves and the stems. Its components and machine vision technology play a role in the tobacco debris removal system as follows:
Application of machine vision inspection system in the removal of tobacco debris defects:
1. Material single-layer processing device: its function is to change the material such as tobacco leaves from a thick laminated state to a very thin single-layer state, and use the "pressing wind" and "bearing wind" to make the tobacco leaves smoothly from the output end of the belt conveyor. Out, and stable operation along the predictable flat throw motion trajectory, providing conditions for subsequent camera detection.
2. Material Lighting System: Its function is to provide illumination for materials. To obtain high quality image signals, adequate illumination of the material is one of the most important prerequisites.
3. Optical system: Its function is to send the reflected light on the surface of the material to the photodetecting element (such as CCD photosensitive) as accurately as possible.
4. Material image acquisition system: its function is to obtain the image of the material (reflected light on the surface of the material) and convert the analog image signal into a digital image signal that can be accepted and processed by the computer through A/D conversion. It includes industrial cameras and image capture cards.
5. Real-time image processing system: its function is to perform the necessary operations and processing on the acquired digital image signals, extract the feature parameters, and output the judgment result according to the preset discriminant criterion through the intelligent judgment decision module, and generate the actuator according to the Control instructions. It includes computer hardware (such as DSP or dedicated image processing cards) and software.
6. The debris rejection system: its function is to separate debris from the tobacco stream. A compressed air injection method is employed in the system. It includes a high speed pneumatic solenoid valve block and a blow chamber.
With the application of comprehensive machine vision technology, with the full implementation of the tobacco industry's quality improvement and consumption reduction project, it will be more and more applied to the quality inspection, monitoring and sorting of the tobacco industry, in order to enhance the international competitiveness of China's tobacco companies. Make a bigger contribution.
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