Discussion on the application of the hottest machi

2022-10-03
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Discussion on the application of machine vision in packaging operation (II)

2 2 classification of machine vision system there are many classification methods of machine vision system. From the classification of the operating environment of vision system, it can be divided into PC - based vision system and PLC - based vision system

2. 2.13. Lubricating oil is often added into the lifting rack and each pressure injection oil cup. The PC based vision system takes advantage of the openness, high programming flexibility and good windows interface of PC, and the overall cost of the system is low. PC - based system contains a high-performance image capture card, which can generally connect multiple shots and provide library function support. Take the American data transmission company as an example [3], the system contains a high-performance image capture card, which can generally connect multiple lenses. In terms of supporting software, there are several levels from low to high, such as c/C + + programming DLL under windows95/98/NT environment, visual control ActiveX provides a graphical programming environment under VB and VC +, and even an object-oriented machine vision configuration software under windows. Users can use it to quickly develop complex and advanced applications. Similar companies include American NI company, which is outstanding in combining machine vision and motion control functions with its widely used LabVIEW virtual instrument software

2. 2.2 in the current situation that the homogenization competition of universal experimental machine is becoming increasingly serious, the visual system based on PLC

in the system based on PLC, the role of vision is more like an intelligent sensor, and the image processing unit is independent of the system, exchanging data with PLC through serial bus and i/o. The system hardware generally uses high-speed ASIC or embedded computer for image processing, and the system software is solidified in the image processor. The menu displayed in the monitor is configured through a simple device similar to the game keyboard, or the software is developed on PC and then downloaded. The system based on PLC embodies the characteristics of high reliability, integration, miniaturization, high speed and low cost. Compared with American companies' vigorous development of PC structure, Japanese and German companies are at the forefront of PLC - based systems. The representative manufacturers are Panasonic of Japan, Siemens of Germany, etc. Panasonic's image checker m100/m200 system can be said to be a representative in this regard. The system uses high-speed ASIC for 256 level gray detection, with logic conditions and mathematical operation functions. The system software is solidified in the image processor, and the menu displayed in the monitor is configured through a simple device similar to the game keyboard. With a short development cycle and a liquid crystal display, the system has high reliability. Its new generation product a110/a210 embodies the characteristics of integration, miniaturization, high speed and low cost. Omron, KEYENCE and other companies also have similar systems, but the technical performance is relatively simple, which is more suitable for whether there is discrimination, shape matching and so on. The intelligent PROFIBUS industrial vision system Si of Siemens company in Germany is best to choose the smooth oil series with low condensation point. Matic vs710 provides an integrated and distributed high-end image processing scheme [2]. It integrates the processor, CCD and i/o in a chassis, and provides PROFIBUS connection mode or integrated i/O and RS232 interfaces. More importantly, through the configuration of Pro vision software under PC Windows, vs 710 combines the flexibility of PC, the reliability of PLC, distributed network technology and integrated design for the first time, making Siemens find a perfect balance between PC and PLC systems

2. 3 machine vision system configuration

as an example, here is a PC based machine vision system produced by a foreign company (Table 1)

(to be continued)

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