LED lamp beads are mainly characterized by low power consumption, high brightness, many colors, anti vibration, long life, cold light source, etc. In recent years, LED lamp beads have been rapidly popularized in all walks of life and widely used in lighting, LED large screen display, traffic lights, computers, electronic toys and gifts, switches, telephones, and many other production fields. It is only a matter of time before they can fully replace white woven lamps.
In practical applications, LED with the same wavelength has the same color. If the color is required to be consistent, it is difficult for manufacturers with high price and no LED spectrophotometer to produce pure color lamp plants.
The vision solution brought by Yuanke Optoelectronics this time is a case of LED lamp bead color difference detection, which detects the color difference of LED lamp beads, including red, green, blue and white.
Project difficulties
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① The LED lamp bead is small, about 1mm * 1mm, so it requires 5 million pixels of high-definition industrial lens for imaging observation.
② The LED lamp panel has a large area, and the lens imaging range is 100mm * 200mm. Therefore, a short focus industrial lens is required to provide a wide imaging field of vision.
③ The lamp bead recognition shall meet the requirements of automatic and efficient detection, and the photographing frequency is 0.3s/pcs, so a gigabit network industrial camera is required.
Solution
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1. The camera uses gigabit network camera;
2. The lens uses a 25 mm industrial lens of 5 megapixel level.
Case results display:
