Image Reading Apparatus Wear Compensation via Dynamic Correction
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Solution Overview
Problem
Image reading apparatuses face variations in image length due to wear and tear of components, leading to inconsistent document feeding speeds and reduced image quality.
Innovation Solution
An image reading apparatus with a feeder that provides frictional force opposite to the transport direction, a correction factor acquisition unit that adjusts based on fed document number and rotational number, and an output unit for displaying correction information, ensuring consistent image length and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the feeder continuously feeds documents through wear-prone components, then productivity is improved, but the frictional force varies causing image length variations
Solution Approach 1:
The system implements feedback by detecting the fed document number and using it to dynamically acquire and apply correction factors that compensate for feeder wear, thereby maintaining consistent image length despite continuous operation
Solution Approach 2:
The system changes the parameter of correction factor based on the fed document number, allowing the image reading apparatus to adapt to feeder wear over time by adjusting the correction factor as documents are fed
2Productivity
If the transport roller transports documents over extended periods, then productivity is improved, but the roller diameter decreases causing transport distance variations
Solution Approach 1:
The system detects the rotational number of the transport roller and uses this feedback to acquire correction factors that compensate for diameter reduction, maintaining accurate transport distance despite extended usage
Solution Approach 2:
The system replaces mechanical precision maintenance with a computational solution, using detection of rotational number and correction factors to compensate for mechanical wear without physical adjustment
3Device complexity
If the feeder operates without correction mechanisms, then device complexity is reduced, but image reading precision deteriorates
Solution Approach 1:
The system introduces an intermediary correction factor that mediates between the simple feeder mechanism and the image reading precision requirement, allowing the simple feeder to achieve precise results through computational correction
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 reduces variations in image length and quality by dynamically adjusting the correction factor based on component wear and user adjustments, enhancing the reliability of image reading processes.
Implementation Method 1
a separating pad configured to generate frictional force between the separating pad and documents
Data Source
AI summary
An image reading apparatus is configured to read an image of each of documents transported in a transport path from an upstream side to a downstream side in a transport direction, acquires a correction factor for correcting a read image on the basis of a fed document number, and corrects the length of the read image in the transport direction on the basis of the correction factor which has been acquired.