High-precision online vision detection system and method based on double-station LED carrier tape

Abstract

This invention discloses a high-precision online visual inspection system and method for LED carrier tape based on a dual-station setup. The inspection system in this invention features an adjustable dual-station configuration to meet the requirements for inspecting the planar appearance and thickness dimensions of the LED carrier tape. The structural design fully considers compatibility, inspection speed, and the maximum permissible operating speed of the carrier tape. Furthermore, addressing the challenges of miniaturized carrier tapes and high precision requirements, a least-squares sub-pixel edge detection algorithm is proposed. This algorithm can effectively detect various feature dimensional parameters on the LED carrier tape, achieving high-speed, high-precision positioning and recognition of feature points on the carrier tape image. To address the issue of defocus blurring when the carrier tape moves beyond the lens's depth of field, a linear compensation algorithm is proposed. This algorithm provides real-time feedback of inspection data, quickly guiding the camera and enabling rapid on-site debugging in industrial settings, ensuring the system can be truly applied in industrial production environments.

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