A real-time ink breakage visual detection method and system in a print process of a plotter

By establishing a mapping between pixel coordinates and physical coordinates, dynamically adjusting the camera frame rate, and employing image preprocessing technology, the real-time and accuracy issues of ink breakage detection during inkjet printing were resolved. This enabled rapid and accurate ink breakage identification and automatic processing, reducing product scrap rates and improving production efficiency.

CN122402084APending Publication Date: 2026-07-17SHANDONG ZHONGKANG GUOCHUANG RES INST OF ADVANCED DYEING & FINISHING TECH CO LTD +1

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG ZHONGKANG GUOCHUANG RES INST OF ADVANCED DYEING & FINISHING TECH CO LTD
Filing Date
2026-04-30
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing ink breakage detection technology for inkjet printers suffers from insufficient real-time performance, low accuracy, and inability to accurately locate individual nozzles, resulting in high product scrap rates and low production efficiency.

Method used

By establishing a mapping relationship between pixel coordinates and physical coordinates, the camera's frame rate is dynamically adjusted. Adaptive filtering and color space conversion technologies are used to achieve real-time image preprocessing and ink breakage identification, accurately locate faulty nozzles, and output audible and visual alarm signals and linkage control commands according to the severity.

Benefits of technology

It enables real-time ink interruption detection during the inkjet printing process, providing rapid response and accurate positioning of individual nozzles, thereby reducing product scrap rates and improving detection accuracy and production efficiency.

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Abstract

本申请公开了一种喷绘机打印过程中实时断墨视觉检测方法及系统,所述方法,包括:打印并采集标准校准图像,对校准图像进行坐标标定后建立像素坐标与物理坐标的映射关系,同时设定各通道的正常灰度范围阈值及断墨判定参数;获取标准参数集中的图像物理尺度参数,根据走纸速度对相机采集帧率进行动态调节后对喷印后的实时图像进行采集并预处理;根据正常灰度范围阈值及断墨判定参数对预处理后图像进行断墨识别;根据断墨区域坐标与尺寸参数对故障喷孔进行定位,同时对断墨的严重程度进行判定;根据判定的严重程度输出相应的声光报警信号,并向喷绘机主控系统发送联动控制指令,实现断墨检测与处理。本申请实现了对断墨故障的实时响应,准确率高。
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