Ground Roller Reflectance Sensing to Prevent Backside Treat
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The occurrence of 'backside treat' in corona treatment systems, where corona discharge affects both sides of a web, leading to undesired treatment and reduced effectiveness, is primarily caused by dirt buildup on the ground roller, which traps air and requires the roller to be serviced.
Innovation Solution
A color sensor is integrated into the corona treatment system to detect imperfections on the ground roller by monitoring reflectance levels, triggering an alarm and potentially halting the system's operation when imperfections are detected, indicating the need for servicing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the ground roller is operated without continuous monitoring, then the system maintains simple operation, but backside treat occurs due to dirt buildup
Solution Approach 1:
The patent replaces manual inspection and mechanical monitoring systems with an optical sensor system that automatically detects dirt buildup on the ground roller. The sensor system uses light reflection principles to monitor the roller surface condition, substituting complex mechanical monitoring mechanisms with a simpler optical detection system that provides reliable early warning of contamination.
Solution Approach 2:
The sensor system enables the corona treatment system to self-monitor its own condition by detecting dirt buildup on the ground roller. The system automatically identifies when maintenance is needed through reflectance measurements, allowing the equipment to service itself by triggering alerts before backside treat occurs, eliminating the need for external monitoring personnel.
2Reliability
If the ground roller is cleaned frequently to prevent backside treat, then backside treat is eliminated, but productivity decreases due to maintenance interruptions
Solution Approach 1:
The sensor system performs preliminary detection of dirt buildup on the ground roller before it reaches critical levels that cause backside treat. By monitoring reflectance changes continuously, the system alerts operators at the optimal time for maintenance, allowing cleaning to be performed just when needed rather than on fixed schedules, thus maximizing operational continuity while preventing defects.
Solution Approach 2:
The system implements continuous feedback monitoring through the sensor that measures ground roller surface conditions in real-time. The sensor provides ongoing information about dirt accumulation levels, allowing the system to dynamically adjust maintenance timing based on actual roller condition rather than predetermined schedules, thereby maintaining high productivity while ensuring reliable prevention of backside treat.
3Measurement precision
If manual inspection of the ground roller is performed, then dirt buildup can be detected, but measurement precision is insufficient compared to automated sensing
Solution Approach 1:
The patent replaces manual visual inspection with an automated optical sensor system that objectively measures ground roller surface reflectance. The sensor provides precise quantitative data about dirt buildup levels, eliminating the subjectivity and variability inherent in manual inspection while maintaining operational simplicity through automated monitoring and clear alert signals.
Solution Approach 2:
The sensor system detects dirt buildup by measuring changes in the reflectance characteristics of the ground roller surface. As dirt accumulates, it alters the optical properties of the roller surface, and the sensor precisely detects these reflectance changes, providing accurate measurement of contamination levels that far exceeds the precision of manual visual inspection while keeping the system easy to operate.
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
Prevents backside treat by ensuring the ground roller is maintained, maintaining optimal treatment efficiency and preventing power loss to the opposite side of the web.
Implementation Method 1
The color sensor is capable of detecting imperfections which have changed the reflectance level of the ground roller from a predefined level
Implementation Method 2
Corona treatment is a method using an electrical corona discharge to modify a surface of a web
Data Source
AI summary
According to an aspect of the present disclosure, a color sensor is provided for sensing whether a ground roller in a corona treatment system needs to be serviced. The color sensor is capable of detecting imperfections which have changed the reflectance level of the ground roller from a predefined level. According to another aspect of the present disclosure, if a determination is made that the ground roller needs to be serviced, then an alarm is activated and/or the operation of the corona treatment system is ceased.