China's industrial technology and system industry has become increasingly mature, and industrial control automation technology is also developing to the direction of intelligence, networking and integration. When it comes to industrial automation, we think of automatic factory machine automation, automatic production lines, but the real sense of understanding is not much. For example, why is machine vision used in industrial automation? Today, we'll find out the answer.
What is machine vision?
The so-called machine vision, is to use machines instead of human eyes to do measurement and judgment. Machine vision system refers to the machine vision products will be taken into the target into image signals, transmitted to the special image processing system, according to the pixel distribution and brightness, color and other information, into digital signals; The image system performs various operations on these signals to extract the features of the target, and then controls the equipment action in the field according to the discriminant results.
Machine vision in industrial automation
There are five main reasons for using machine vision systems in industrial automation control:
Accuracy - Because of the physical limitations of the human eye, machines have obvious advantages in accuracy. Even if the human eye relies on a magnifying glass or microscope to examine the product, the machine will still be more accurate because it will be accurate to the thousandth of an inch.
Repeatability - The machine can perform the test in the same way over and over again without getting tired. The human eye, by contrast, detects a product slightly differently each time, even if it is identical.
Speed - Machines can test products faster. Especially when detecting objects moving at high speeds, such as on a production line, machines can increase productivity.
Objectivity -- Another fatal defect of human eye detection is the subjectivity brought by emotions. The detection results will vary with the mood of the workers, while the machine does not have emotions, sorrows, joys, etc., so the detection results are naturally very considerable and reliable.
Cost - Since machines are faster than people, an automatic detection machine can take on the tasks of several people. And the machine does not need to stop, will not get sick, can work continuously, so can greatly improve the production efficiency.
The use of machine vision system can not only quickly obtain a lot of information, and easy automatic processing, but also easy to design information and processing control information integration, therefore, in the modern automated production process, machine vision system is widely used in conditions monitoring, finished product inspection and quality detection and other industries. Machine vision system has the characteristics of high production flexibility and automation. In some not very good environment, not suitable for manual work or artificial vision is difficult to meet the requirements of the occasion, commonly used machine vision to replace artificial vision; At the same time, in the process of mass industrial production, the machine vision detection method can greatly improve the production efficiency and the degree of automation of production. And machine vision is easy to realize information integration, is the foundation of digital manufacturing.
Therefore, machine vision and industrial automation are indispensable, machine vision is a branch of automation, there is no automation is impossible to have machine vision. Machine vision has the characteristics of fast speed, high precision and low noise in the process of use and can adapt to most of the harsh environment. If it is used in the field of industrial automation, it can replace the production mode based on manual and mechanical, improve production efficiency, and greatly save the cost required by manpower and mechanical maintenance. In addition, machine vision technology can also effectively improve the precision of industrial automation production, so as to promote the good development of industrial industry.
