Release time：2023-03-22 11:03:50 Viewed：0
CCD machine vision inspection equipment in the detection of products, several unstable factors will lead to a great impact on the detection accuracy and efficiency. The following Xiaobian and everyone together to analyze the unstable factors in the detection of CCD visual detection equipment.
First, CCD visual inspection equipment instability factors: industrial cameras
For CCD visual inspection equipment, the key selection of industrial camera takes into account its sensor type, pixel and frame number, in which the controller is divided into CCD and CMOS two, CMOS optical lens processing speed is high, each component, power circuit intermediate spacing is very close, the impact is serious, high noise development, Compared with CMOS camera, CCD controller camera has the characteristics of high sensitivity, low noise and fast response time. On the stability level, CCD camera has strong shock and vibration resistance. Generally speaking, CCD controller camera is better than CCD camera on the development quality and stability level.
Another key factor affecting the image quality of the camera is the wide-angle lens of the camera. In addition to the main parameters of the wide-angle lens, such as the focal length, focal length and focal length, which must be selected according to the actual situation in the work, a key factor affecting the accuracy of the network detection is that the geometric deviation of the image can not be cleared, but can only be filled. Although many industrial cameras today use a variety of methods to fill in the gaps caused by wide-angle lens distortion, in the high-precision inspection industry, the geometry can still affect the accuracy of the inspection.
Two, CCD visual detection equipment instability factor: light source
The light source has the characteristics and shortcomings of enlarging image, the effect of eliminating confusion and background picture, which immediately affects the quality of input data information. Because there is no universal lighting fixture, the design scheme of light source has been the problem of machine vision technology. Generally, it is necessary to select the type of light source for each special application case. Also according to the actual natural environment of the light source installation, light source direct method to carry out the weight, in order to exceed the best practical effect. There are differences in the stability of different kinds of light sources. The common light sources are ring light, strip light, surface light source, back light source, coaxial light, bowl light and so on. Therefore, the selection difference of light source is also an unstable factor affecting ccd visual detection equipment.
Three, CCD visual inspection equipment instability factors: machine vision software
The influence of the stability of machine vision software on machine vision technology is beyond doubt. The visual recognition system will eventually carry out a series of image processing such as image filtering, edge detection and edge acquisition by computer with purposeful optimization algorithm. Different image processing and analysis methods and different inspection methods and calculation methods. Are produced different deviations, the optimization algorithm is good or bad decision precision measurement accuracy, therefore, need to choose the right machine vision software, so as to avoid CCD visual detection equipment accuracy becomes low.
Vision software system: Simple and easy to operate, no image professional knowledge, no need to write code on the spot to meet various visual needs, geometric positioning, measurement, detection, identification support image tools dynamic loading, delete multi-camera multi-station multi-function parallel processing speed, more than 100 kinds of self-created algorithm support customization, provide secondary development kit, to meet different customer needs to support multi-brand cameras, Mainstream PLC/ robot docking.
Four, CCD visual testing equipment instability factors: environmental factors
The accurate measurement of natural environment in the work of visual identification system includes temperature, sunlight exposure, switching power supply transformation, dust, environmental humidity and interference signals, etc. A good natural environment is to ensure the normal operation of visual identification system. Therefore, the environmental factors are also the unstable factors of CCD visual inspection equipment, interference signal is the influence factor of industrial production inspection on the spot is difficult to avoid, it is the influence of industrial camera power circuit, network signal transmission power circuit and other weak power circuit installation power circuit is particularly serious, therefore, in the use of CCD visual inspection equipment, need to choose the appropriate environment.
The above is the influence of CCD visual inspection equipment instability factors.
