Throughout the market development, machine vision detection system to replace manual detection will be the inevitable trend of modernization process. Machine vision detection system has high detection accuracy, can quickly obtain a large amount of information and automatic processing, therefore, this technology is also widely used in the field of industrial detection.
Since the reform and opening up 30 years ago, industrial production has higher and higher requirements for testing, and the cost input has gradually increased. Such demand and environment have promoted the blowout development of domestic machine vision technology, and more and more industrial testing projects have begun to adopt non-contact optical, mechanical, electrical, vision, chemical and other comprehensive technical means. The following will give you an example of the application of key technologies of machine vision in tobacco debris removal system.
The whole process of tobacco leaves from entering the production line of cigarette factory to producing finished cigarettes has gradually been removed from manual assistance, especially after the leaves are changed into leaves, there is no longer the process of manual leaf laying, so the sundry and mildewed tobacco leaves mixed in the leaves cannot be removed. They have a greater impact on the quality of cigarette products. Tobacco debris removal equipment is a system used to remove debris and moldy tobacco leaves on the silk production line of leaf rebaking silk, leaf silk and stem silk. Its components and the role of machine vision technology in tobacco debris removal system are as follows:
Application of machine vision detection system in eliminating tobacco debris defects:
1. Material single-layer processing device: its function is to change the tobacco leaf and other materials from a thick layered state to a very thin single-layer state, and use "pressure wind" and "support wind" to make the tobacco leaf smoothly thrown from the output end of the belt machine, and run stably along the predictable flat throwing trajectory, providing conditions for subsequent camera detection.
2. Material lighting system: its role is to provide lighting for materials. In order to obtain high quality image signal, sufficient illumination of the material is one of the most important necessary conditions.
3. Optical system: its function is to send the reflected light on the surface of the material to the photoelectric detection element (such as CCD photosensitive parts) as accurately as possible.
4. Material image acquisition system: its function is to obtain the image of the material (the reflected light on the surface of the material) information, and through A/D conversion, the analog image signal into the computer can accept and process the digital image signal. It includes an industrial camera and an image acquisition card.
5. Real-time image processing system: its function is to collect the digital image signal to carry out the necessary operation and processing, extract the characteristic parameters, through the intelligent judgment decision-making module, according to the preset discriminant criteria output judgment results, and then generate the control instructions of the executive mechanism. It includes computer hardware (such as a DSP or a dedicated image processing card) and software.
6. Debris removal system: Its function is to separate debris from the stream of tobacco leaves. In this system, the compressed air injection mode is used. It comprises a high speed pneumatic solenoid valve group and a jet cavity.
The application of comprehensive machine vision technology, with the comprehensive implementation of the project to improve quality and reduce consumption in the tobacco industry, it will be more and more applied to the quality testing, monitoring and sorting of the tobacco industry, and make greater contributions to the promotion of the international competitiveness of China's tobacco enterprises.
