Optical Rigidity Detection for Continuous Sheet Transport
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Solution Overview
Problem
Existing sheet manufacturing apparatuses cannot detect the rigidity level of manufactured sheets without adversely affecting productivity, as existing detection methods require pausing or slowing down sheet transport.
Innovation Solution
A rigidity level detection apparatus is integrated into the sheet manufacturing process, featuring a transport unit, a press unit with deformable rollers, and a detection unit using sensors to determine the sheet's rigidity level while maintaining continuous transport speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a level sensor is used to detect the amount of loosening during printing, then the rigidity level can be detected, but sheet transport must be paused or slowed down, resulting in lower productivity
Solution Approach 1:
The patent replaces the mechanical level sensor-based detection method with an optical detection system using light emitting and light receiving units. This substitution allows rigidity detection to occur without mechanical contact or interruption of sheet transport, thereby maintaining high productivity while achieving accurate rigidity measurement through optical means.
Solution Approach 2:
The invention enables continuous sheet transport during rigidity detection by eliminating the need to pause or slow down the transport mechanism. The light-based detection system operates concurrently with uninterrupted sheet movement, ensuring that the useful action of sheet production continues without interruption while measurement takes place.
2Measurement precision
If existing rigidity detection mechanisms are applied to sheet manufacturing, then rigidity level can be measured, but sheet transport speed must be reduced, affecting overall manufacturing efficiency
Solution Approach 1:
The patent substitutes mechanical detection methods with an optical system using light emitting and receiving units positioned to detect sheet characteristics during transport. This non-contact optical measurement enables rigidity assessment without the mechanical interference or speed restrictions inherent in traditional methods.
Solution Approach 2:
The detection system is designed to operate during continuous sheet transport without requiring speed reduction or pausing. The light-based measurement captures rigidity information while sheets move through the system at normal production speeds, maintaining manufacturing efficiency.
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 accurate detection of sheet rigidity levels without pausing or significantly reducing transport speed, thus maintaining productivity while ensuring only sheets with appropriate rigidity levels are produced.
Implementation Method 1
a detection unit having a sensor that detects a given position on the sheet moved in the transport direction by deforming
Data Source
AI summary
Provided is a rigidity level detection apparatus provided in a sheet manufacturing apparatus that manufactures a sheet by performing compression shaping of a defibrated material of a fiber-containing material and configured to detect a rigidity level of the sheet. The rigidity level detection apparatus includes a transport unit that transports the sheet, a press unit having a press member that deforms the sheet by pressing the sheet in a direction intersecting with a transport direction of the sheet while the sheet is transported by the transport unit, a detection unit having a sensor that detects a given position on the sheet moved in the transport direction by deforming, and a determination unit that determines the rigidity level of the sheet based on a detection value from the sensor.