Blanket Drum Creep Detection Using Dual-End Temperature Sensors
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Solution Overview
Problem
The blanket held by the blanket drum in LEP printing is prone to move out of its correct position, leading to inaccurate temperature readings by sensors and affecting print quality and component lifespan.
Innovation Solution
A system with first and second sensors at the ends of the blanket drum takes temperature readings to identify blanket creep conditions, and a remedial measure engine addresses the identified creep by sending user messages or adjusting temperature data to correct the issue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature sensors are positioned at the ends of the blanket drum to monitor blanket temperature, then temperature monitoring capability is improved, but measurement precision deteriorates due to blanket creep causing inaccurate readings
Solution Approach 1:
The system continuously monitors blanket temperature at multiple positions and compares actual readings against expected temperature profiles. When deviations indicate blanket creep, the system generates feedback signals to alert operators and can automatically adjust heating parameters to compensate for the shifted blanket position, maintaining measurement accuracy despite position changes
Solution Approach 2:
The system establishes expected temperature profiles and creep detection thresholds before operation begins. By pre-programming normal temperature variations and creep patterns, the system can immediately detect anomalies when they occur, enabling early intervention before print quality deteriorates
2Reliability
If multiple temperature sensors are added to detect blanket creep conditions, then detection capability is improved, but device complexity increases
Solution Approach 1:
The blanket drum surface is divided into multiple monitoring zones with sensors positioned at specific locations (e.g., ends and center). Each sensor monitors a specific segment, and by comparing readings across segments, the system can detect creep conditions without requiring complete coverage, reducing the total number of sensors needed while maintaining detection accuracy
Solution Approach 2:
The temperature sensors serve dual purposes: they monitor both the temperature for print quality control and the blanket position for creep detection. This multi-functionality allows the system to detect blanket creep using existing temperature monitoring infrastructure, avoiding the need for separate dedicated creep sensors and reducing overall system complexity
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
Enables early detection and remediation of blanket creep, improving print quality, extending the lifespan of components, and enhancing the safety and efficiency of LEP printing systems.
Implementation Method 1
a sensor adjacent to the blanket drum is to take a temperature reading of the blanket drum
Data Source
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AI summary
In one example of the disclosure, a first sensor located adjacent to a first end of the blanket drum is utilized to take a first temperature reading. A second sensor located adjacent to a second end of the blanket drum is utilized to take a second temperature reading. A blanket creep condition is identified responsive to determining a difference in blanket drum temperatures is in excess of a predetermined threshold. A remedial measure is caused to be performed to address the blanket creep condition.