Xinxiwang teaches you to analyze the unstable factors of CCD visual inspection equipment

In the machine vision industry, whether it is new personnel or professionals, in the process of using CCD visual inspection equipment, if there are unstable factors, it will easily lead to a great impact on the detection accuracy and efficiency. Let's take a look at what are the factors that affect the instability of CCD visual inspection equipment?

First, industrial cameras

For CCD visual inspection equipment, the key to the selection of industrial cameras 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, the middle distance of each component and power circuit is very close, the impact is serious, the development noise is high. CCD controller camera relative to CMOS camera has high sensitivity, low noise and fast response time characteristics, in the stability level, CCD camera shock and vibration resistance is also strong, generally speaking, CCD controller camera in the image quality and stability level is better than CCD camera.

Another key factor affecting the quality of the camera is the camera's wide-angle lens, wide-angle lens in addition to the main parameters such as the focal length, focal length and focal length that must be selected according to the actual work, a key factor affecting the accuracy of network detection is that the geometric distortion of the image can not be cleared, only fill. Although many industrial cameras today fill the bias caused by wide-angle lens changes in a variety of ways, in the high-precision inspection industry, geometry still affects inspection accuracy.

Second, Light Source

The light source has the characteristics and shortcomings of the larger image, the effect of weakening the confusion and the background image, which immediately affects the quality of the input data information, because there is no universal lighting fixture, the design scheme of the light source has been a problem of machine vision technology, and it is generally necessary to select the type of light source for each special use case. It is also necessary to weigh the installation of the light source and the direct injection method of the light source according to the actual natural environment to exceed the best actual effect. There are differences in the stability of different types of light sources, the common light sources are ring light, strip light, surface light, backlight, coaxial light, bowl light and so on. Therefore, the selection difference of the light source is also an unstable factor affecting the CCD visual inspection equipment.

Third, machine vision software

The influence of the stability of machine vision software on machine vision technology is undeniable. The visual recognition system will eventually use the computer to select a purposeful optimization algorithm to carry out a series of image processing, such as image filtering, edge detection and edge acquisition, with different image processing and analysis methods and different inspection methods and calculation methods. All of them produce different deviations, and the optimization algorithm is good or bad to decide the level of accurate measurement accuracy, therefore, it is necessary to choose the right machine vision software, so as to avoid the low accuracy of CCD visual inspection equipment.

Vision Software System: Simple and easy to operate, no image expertise, no need to write code on site to meet various visual needs, geometric positioning, measurement, detection, identification support image tools dynamic loading, deletion multi-camera multi-station multi-function parallel processing speed, more than 100 kinds of self-created algorithms support customization, provide secondary development kit, to meet different customer needs to support multi-brand cameras, Mainstream PLC/ robot docking.

Fourth, environmental factors

The accurate measurement of the natural environment in the work of the 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 the visual identification system. Therefore, environmental factors are also unstable factors of CCD visual inspection equipment, interference signal is an unavoidable factor of industrial production inspection on the spot, it is especially serious on the industrial camera power supply circuit, network signal transmission power supply circuit and other weak power installation power circuit, therefore, in the use of CCD visual inspection equipment, you need to choose the right environment.