Real-time fabric defect photoelectric detection system

ZHANG Qiu-kun1， ZHONG Shun-cong 1，2
（1. School of Mechanical Engineering and Automation， Fuzhou University， Fuzhou 350108，China；
2. Key Laboratory of Safety Science of Pressurized System of Ministry of Education， East China University
of Science and Technology， Shanghai 200237， China）

Abstract：Aiming at solving the low efficiency problems of manual visual fabric defect inspection，a real-time fabric defect photoelectric detection system was investigated. Instead of detection of light reflection from fabric，a light transmission technique with higher signal-to-noise rate was employed in the system for evaluating the fabric defect. A photodiode was used to record the defect signal of fabric. The weak signal was amplified，filtered，and then converted to a digital signal by an analog-to-digital converter. Consequently，the digital signal was sent to a microcomputer. The signal was quantitatively evaluated and finally a defect alarm was triggered. From the experimental results，the timeliness，robustness and detection precision of the system are demonstrated，therefore，it can be recommended for the applications in fabric industries.
Key words： fabric defect detection； photoelectric detection； microcomputer