Patterning Device Image Detection Sensor Positioning
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Solution Overview
Problem
Devices for patterning workpieces, such as those made of wood, often produce distorted or defective printed images due to inadequate positioning and color variations, leading to suboptimal image quality.
Innovation Solution
Incorporating an image detection sensor and control means to precisely determine the workpiece's position and analyze its surface, allowing for real-time adjustments to the printing process, including nozzle control and maintenance, to ensure accurate and high-quality printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional sensors are used for rough detection of workpiece contour and thickness, then the device structure remains simple, but the printed image quality deteriorates due to inadequate positioning and color variations
Solution Approach 1:
The patent replaces conventional mechanical/rough sensors with optical detection sensors (cameras, color measurement sensors) to detect workpiece position, contour, and color information. This substitution enables precise digital capture of workpiece characteristics, which are then processed by control means to adjust printing parameters, thereby improving printed image quality without excessive mechanical complexity
Solution Approach 2:
The patent implements a feedback mechanism where detection sensors continuously monitor workpiece position and color, the control means processes this information, and the printing means adjusts its operation accordingly. This closed-loop feedback system ensures real-time corrections to maintain high printed image quality while managing system complexity through automated control
2Measurement precision
If no image detection sensor is used, then the device structure remains simple, but positioning accuracy deteriorates causing distorted and smudged printed images
Solution Approach 1:
The patent uses optical detection sensors (cameras) to replace rough mechanical positioning sensors. These optical sensors provide high-precision digital images of the workpiece, enabling accurate determination of workpiece position, orientation, and contour through image processing, thereby achieving precise positioning without complex mechanical adjustment mechanisms
Solution Approach 2:
The patent creates a digital copy of the workpiece through image detection sensors. This digital representation (image data) is then processed by the control means to determine precise positioning information and adjust printing parameters, eliminating the need for direct mechanical measurement and improving positioning accuracy
3Manufacturing precision
If printing is performed without real-time surface analysis, then the printing process is faster, but image quality deteriorates due to defects and color variations
Solution Approach 1:
The patent implements continuous detection and printing operations. The detection sensor continuously monitors the workpiece surface during the printing process, and the control means continuously adjusts printing parameters based on real-time feedback. This continuous operation ensures high image quality without significant interruption to printing speed
Solution Approach 2:
The patent performs preliminary detection of workpiece surface characteristics (color, defects, contour) before the printing process begins. The control means uses this advance information to pre-adjust printing parameters such as ink quantity, color mixing, and positioning, ensuring optimal printing conditions are established before actual printing commences, thereby maintaining both quality and speed
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly enhances printed image quality by preventing distortions and defects, maintaining precise control over the printing process, and ensuring reproducible results through continuous monitoring and corrective measures.
Implementation Method 1
The term 'image detection sensor' refers in this case at least to any means which operates on an optical basis and supplies information about the image formed
Implementation Method 2
a drying means, in particular a UV drying means. This allows a predetermined drying state of the applied ink to be produced before the respective image detection is carried out
Data Source
AI summary
The invention relates to a device (1) for patterning workpieces (2), which preferably consist at least partially of wood, wood materials or the like, having an ink-jet printing means (10) having a plurality of nozzles (12) from which drops of ink can be expelled, a workpiece carrier means (20) for carrying the workpiece (2) to be patterned, a conveyor device for bringing about a relative movement between the workpiece (2) to be patterned and the printing means (10). The device according to the invention is characterised in that it further has at least one image detection sensor (46).