Roller Pressure Sensor for Roll-to-Roll Substrate Transfer
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Solution Overview
Problem
Conventional roll-to-roll devices face challenges in uniformly distributing tension and detecting pressure variations during the transfer of ultrathin glass substrates, which can lead to breaking or cracking, and existing sensors like load cells are inadequate for monitoring pressure distribution.
Innovation Solution
A roller with pressure sensors comprising a plurality of pressure sensing units distributed on a thin film, electrically connected but not in contact, which are mounted on intermediate rollers to detect non-uniform pressure distribution and transmit signals for real-time adjustment of tension and speed to ensure uniform transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional load cell sensors are used under the roller to detect tension, then tension detection capability is provided, but the sensors cannot detect pressure distribution or speed variation during the transfer process
Solution Approach 1:
The pressure sensor is divided into multiple pressure sensing units distributed on a thin film, allowing detection of pressure distribution across different locations. Each sensing unit independently detects local pressure, enabling comprehensive pressure mapping without requiring a complex array of separate sensors
Solution Approach 2:
Multiple pressure sensing units are integrated onto a single thin film substrate, combining multiple detection functions into one unified sensor assembly. This merged structure simplifies installation and reduces the number of separate components needed while maintaining comprehensive pressure detection capability
2Reliability
If sensors are arranged in a load cell under the roller to detect tension and speed, then breaking or cracking detection is enabled, but uniform pressure distribution cannot be monitored
Solution Approach 1:
Multiple pressure sensing units are distributed at different locations on the thin film, allowing local pressure conditions to be detected independently. This enables identification of localized pressure variations that could indicate potential substrate damage while maintaining overall reliability monitoring
3Measurement precision
If a pressure sensor with electrically connected but non-contacting sensing units is used, then pressure distribution monitoring is achieved, but electrical connection without physical contact must be implemented
Solution Approach 1:
The thin film serves as an intermediary substrate that mechanically supports multiple pressure sensing units while allowing electrical connections to be made without direct physical contact between the sensing units themselves. This mediator enables independent positioning of sensing units while maintaining electrical connectivity through the film structure
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 enables continuous monitoring and adjustment of pressure distribution, improving transfer efficiency and preventing substrate damage by ensuring uniform tension and speed, thus enhancing the smoothness and accuracy of the manufacturing process.
Implementation Method 1
a pressure sensor is attached to the roller and the pressure sensor comprises a plurality of pressure sensing units distributed on a thin film
Data Source
AI summary
Provided is a roller with pressure sensor. The roller includes a pressure sensor mounted to the roller. The pressure sensor includes a plurality of pressure sensing units distributed on a thin film. The pressure sensing units are electrically connected to each other with a metal wire but not in contact with each other. Also provided is a roll-to-roll device, which includes a roller mechanism and a pressure sensor.