Can machine vision completely replace manual inspection
When the naked eye can not accurately distinguish the quality of products, highly intelligent machine vision equipment has become the first choice for replacement.
With the acceleration of the automation process in the manufacturing industry, the inspection of the size, size, defects and appearance defects of various parts is becoming more and more strict. However, the traditional visual inspection of the root cannot meet the requirements of high-speed and accurate inspection. Therefore, efficient, accurate, stable performance, intelligent and automatic machine vision inspection system is widely used in various manufacturing fields.
With the maturity of machine vision technology, more and more manufacturing enterprises are considering how to use machine vision to help the production line realize the functions of inspection, measurement and automatic identification, so as to improve efficiency and reduce costs, so as to maximize production benefits.
Whether machine vision can completely replace manual inspection needs to be divided into two aspects: cost and technology.
If an enterprise wants to replace human eye detection with machine vision detection, it needs to be upgraded, which is a difficult expenditure for small and medium-sized enterprises. At the same time, it also needs relevant talents after using machine vision detection, which is another expenditure. Therefore, at present, machine vision detection replaces human eye detection only in some powerful large enterprises. Unless it is necessary for small and medium-sized enterprises to upgrade and replace, they will not consider it.
Compared with the cost, technology is the key reason that restricts the replacement of human eye detection by machine vision detection. At present, lighting is a difficult point in the application of machine vision detection. If the obtained pictures are viewed by people and the results can only be given after careful consideration, then the algorithm is too difficult to do. On the contrary, if we do a good job in lighting in the early stage and highlight the features to be detected, the algorithm is not difficult.
At present, machine vision inspection is much more intelligent than human, which is mainly reflected in unexpected defect recognition. At present, machine vision is to give some specific defect patterns to identify whether they have occurred or not. This sometimes leads to some obvious defects, just because there is no specific information stored in the machine vision system because there is no previous occurrence or mode diversification, resulting in missed detection of machine vision detection; When such errors are detected manually, even if the defect has not been found before, there is still a great chance to find it through our own judgment.
At present, there are many smart camera suppliers and many analysis software suppliers. Although their software algorithms have their own characteristics, they are really similar in use and have very similar functions. However, they all process the pictures obtained by the camera according to fixed patterns and steps, analyze an expected feature from the pictures, and then give the discrimination results. There is no revolutionary intelligent algorithm.
Machine vision detection can not achieve human intelligence recognition in a short time, because the theories related to image analysis algorithms are not ready.
However, compared with human eye detection, machine vision detection has the greatest advantage, that is, stability. Manual inspection through the naked eye, even if the reward and punishment system is well designed, there may be a missed inspection rate, while machine vision inspection will not be missed due to negligence. Therefore, machine vision inspection is superior to human eye inspection in terms of stability inspection most needed by factory inspection. Even if the above-mentioned non algorithm special defects occur, it is a small probability event after all, and the frequent defects can still be found by machine vision inspection.
At the same time, in terms of cost, with the development of machine vision and the downward trend of price, it can be more popular. At present, four operators are required for four shifts in general factories, and the annual cost is more than 200000, and 200000 can almost build a set of machine vision.
Therefore, it is a trend for machine vision inspection to replace manual inspection, which will be more and more popular. The main reason for the restriction at present is that machine vision inspection is not intelligent enough. It will take a long time for machine vision to replace manual inspection.