At present, machine vision inspection is widely used. It can not only control the quality rate of enterprise products, but also greatly improve the accuracy rate compared with manual inspection. But in practical application, there are two problems? Note that the instability of the light source and the inconsistent position of the measured object are respectively.
Due to the different materials, reflection and refraction on the surface of the detected object, the problem of light source lighting and imaging is the first difficulty to be overcome. Especially in the detection of glass and reflective objects.
In the application of machine vision, it mainly includes four aspects: measurement, detection, recognition and positioning. The measurement is most likely to be affected by the light. Only 10% - 20% of the light changes, the measurement results will have a large error, basically about 1 to 2 pixels. These problems are not software problems, but lighting changes the edges of the image. Therefore, when providing customers with machine vision system solutions, VisionSmart will try to minimize the interference of light source lighting problems to ensure the stability of the light source of the machine vision system.
In the design of machine vision system, it is necessary to consider the change of the detected object's detection position in the shooting field of view. Under the requirement of high quality, only the fixture to achieve the position adjustment or other forms can not completely ensure that the target to be measured is in the same position, and there will be a large error in the detection. Therefore, it is necessary to cooperate with the positioning function to ensure that the deviation of the measurement results is small enough.
