The accuracy of vision measurement is the key factor to judge whether a visual inspection system is successful or not. In the technical measurement project of visual inspection system, many customers will encounter some problems caused by insufficient detection accuracy. How to judge the accuracy of machine vision inspection technology?
After the completion of the design of the visual inspection system, it is necessary to test to determine whether it can check the size of the parts you want to detect, the resolution rate of the camera used, and the accuracy of the software algorithm. You can image things that need to be detected clearly. Only when the boundary needs to be detected has correct and obvious color difference, can it be realized.
For example: to detect the overall dimension, inside and outside diameter of machining parts, the accuracy is required to be 10um. At present, many configurations choose 5 million cameras, which can theoretically reach the accuracy of 10um. But the accuracy of the actual customer test is far less than the requirement of 10um, it is very good to be able to do 30um.
The size of the parts to be tested is related to the resolution of the camera used and the accuracy of the software algorithm. Of course, the first thing is that you can clearly image what needs to be detected, and the boundary that needs to be detected has correct and obvious color difference.
Generally speaking, the larger the field of view of the part in the image, the higher the resolution of the camera and the clearer the detected boundary, the higher the detection accuracy. When the product vision is suitable and the shooting effect is good, the accuracy of Hongbao automatic visual inspection system to detect the workpiece size can reach less than one trace.
The detection system based on machine vision technology has the advantages of low cost, high precision and easy installation. Combined with powerful visual software, it is easy to adjust, flexible and convenient, and the measurement data can be stored, which is convenient to establish statistical analysis, to quickly find problems and solve problems, which is the best choice of industry detection technology.