1、Working principle of machine vision system

   Different from the human eye system, the machine vision system is mainly composed of computer, optical system, image acquisition card, CCD camera and focusing mirror.  The specific working process of the system is as follows:  The light from LED backlight and coaxial light source shines on the object to be detected at the same time, and the reflected light is refracted through the optical lens in the photoelectric sensor of CCD camera and forms an image. The image acquisition card converts the image into electrical signal, which is saved in the computer after the analog-to-digital conversion. At the same time,  The computer runs the corresponding image processing software, according to the different color, pixel distribution, brightness and other information, the color, size and shape of the object can be recognized and judged.  

2、Application of visual positioning technology

   When the object to be cut is placed on the rotating workbench, the lens of the automatic focusing system will directly focus on the edge of the object. After the information is transmitted to the computer, the automatic focusing evaluation function will be used to identify and judge the edge.  System of automatic focus is on the other hand, if the lens depth of field not within the scope of the area of information, the computer control and micro displacement Z axis motor motion control focusing mechanism, makes by cutting objects in the system again the focus of the lens, then through the computer to collect on the cutting edge of the object point, after the completion of the acquisition of the data is passed to the computer for processing,  Finally, determine whether the image is in the focal position.  If so, the image is collected as the best image and stored;  If not, the computer needs to control the Z-axis motor for micro-movement, collect the edge of the object again, process and judge, and so on until the collected image is judged to be a focusing image.  Then the focus control mechanism stops working and is stored.  The whole workflow is realized under the prompt and control of the computer, so the workflow also has a higher signal amplification module and intelligent electrical module.