The working process of CCD is divided into four parts: photoelectric conversion, charge storage, charge transfer and charge detection. Photoelectric conversion is the conversion of optical signals into electrical signals.CCD consists of a number of photosensitive pixels, each pixel is a photodiode that detects the charge generated on the pixel, and the amount of signal charge generated is directly proportional to the intensity of the incident light and the exposure time.
CCD Visual Inspection CCD Visual Inspection Working Principle
CCD Visual Inspection equipment is the use of machines instead of the human eye for measurement and judgment.CCD Visual Inspection Working Principle refers to the CCD image pickup device will be captured by the object converted into image signals, and then sent to a dedicated image processing system, according to the distribution of pixels and brightness, color, and other information, and will be converted into a digital signal; image processing system, based on the distribution of pixels, brightness, color and other information, will be converted into a digital signal. Converted to digital signals; the image system performs various operations on these signals to extract the characteristics of the target (e.g., area, number, position, length), and then according to preset permissible ranges and other conditions, including size, angle, number, face pass/fail, yes/no, etc., to realize the automatic identification function. The operation of the equipment is then controlled in the field based on the results of the discrimination. This is a valuable mechanism for production, assembly or packaging. It is invaluable in detecting defects and preventing defective products from being delivered to consumers.
CCD Vision Inspection Machine CCD Vision Inspection Function
CCD machine vision system is a high-tech product used for industrial inspection and identification, machine vision improves the flexibility and automation of production. In some cases not suitable for hazardous working environment or manual vision, these conditions are difficult to meet the requirements of manual work, usually use machine vision to replace manual vision. At the same time, in large-scale industrial production processes, manual vision is used to check product quality and efficiency is not high, and accuracy is not high, machine vision inspection methods can greatly improve productivity and production automation.
In today's world, science and technology are changing rapidly, and continue to introduce more and more powerful and complex technology products, for people's work and life to bring innovative experience and change. Behind these high quality technological products, there exists an increasingly complex production process that requires machining, assembly and inspection. These put more and more demands on the eyes of automated machines, CCD machine vision systems. ccd machine vision systems in industry will become more and more popular. In the future, it will replace manual labor in factories for some inspection and identification.
CCD vision inspection equipment CCD vision inspection of important factors
Lighting is an important factor affecting the input of the machine vision system, which directly affects the quality of the input data and the application effect. Since there is no universal machine vision lighting device, for each specific application example, the appropriate lighting device must be selected to achieve the best results.
Light sources can be categorized into visible and invisible light. A few common visible light sources are white flag lamps, fluorescent lamps, mercury lamps and sodium lamps. The disadvantage of visible light is that the light energy cannot be kept stable. How to keep the light energy stabilized to a certain extent is an urgent problem to be solved in the actual process.
On the other hand, ambient light may affect image quality, so you can use the method of adding a protective screen to minimize the impact of ambient light. Based on their illumination methods, lighting systems can be categorized into: backlighting, forward lighting, structural lighting and strobe lighting.
Backlighting, in which the object to be measured is placed between the light source and the camera, has the advantage of acquiring high-contrast images. Forward illumination means that the light source and the camera are located on the same side of the object to be measured, which is easy to install.
Structured light illumination projects a grating or linear light source onto the object to be measured and demodulates the three-dimensional information about the object based on the distortion they produce. Strobe flash illumination is designed to direct high-frequency light pulses onto the object, and the camera shot needs to be synchronized with the light source.
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