Study On Phosphor Magnet Power Flaw Detection Methods For Wheel Band Surface Based On Linear CCD

In order to meet special requirements of automation and intelligent in flaw detection for wheel band surface, supported by the traditional phosphor magnet powder flaw detection methods, take advantage of the CCD technology and the image processing technology, we design a set of the fluorescent magnetic particle detection system for wheel band surface based on linear CCD. Research work is described as follows in detail in this paper:1. The working principle of CCD image sensor is described in detail. According to emission spectrum of the phosphor magnet powder and requirements of the fluorescent magnetic particle detection system, a high sensitivity and high-level linear CCD camera is adopted to meet the systems.2. In view of bad on-site working conditions and excited spectrum of the phosphor magnet powder, the light source system is optimally designed. A UV-LED light source is adopted to obtain the high intensity and uniform illumination. In order to filter effectively harmful ultraviolet ray and useless visible light, we add a glass filter in front of the ultraviolet source. The new light source not only improved the on-site working conditions, but also meet the requirements of the phosphor magnet powder flaw detection systems.3. In order to eliminate the influence of the interference information in the image, such as the pseudo-defect water marks, knife marks and so on, a good set of image processing software is designed through analyzing the flaw characteristics and image processing algorithms.4. The detection principle and structure of the fluorescent magnetic particle detection system for wheel band surface based on linear CCD have been introduced in detail in this paper. The system is easy to operate and can be achieved online real-time detection for the wheel band surface flaw based on suitable image processing software.The wheel band surface fluorescent magnetic particle detection system for wheel band surface based on linear CCD is a new generation of automation and online flaw detection system. The system perfect the deficiency of traditional phosphor magnet powder flaw detection methods, such as bad on-site working conditions, easily leading to missed detection and so on, which provides experience and reference for the flaw detection of other ferromagnetic material surface.