Document Handling Apparatus Multi-Direction Light Detection
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Solution Overview
Problem
Existing document handling apparatuses face challenges in accurately determining the defacement degree of paper sheets, particularly for valuable securities, as they struggle to differentiate between contamination and other forms of damage, leading to low determination accuracy and inconsistencies with human perception.
Innovation Solution
The apparatus employs a multi-light-source detection system that irradiates the paper sheet from different directions, using a combination of transmitted and reflected image detection units to analyze shading, wrinkles, and folds, and processes the data to accurately determine defacement by changing lighting patterns and image processing techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single detection method (either toughness detection or visual detection of non-printed parts) is used, then the detection system remains simple, but the determination accuracy of defacement degree is low and cannot accurately differentiate between contamination and other forms of damage
Solution Approach 1:
The patent combines multiple detection methods (toughness detection using sound intensity, visual detection of non-printed parts, and printed part analysis) into a single integrated document handling apparatus. The control unit processes multiple types of detection results simultaneously to comprehensively determine the defacement degree, resolving the contradiction by merging simple detection methods into a complex but accurate determination system.
Solution Approach 2:
The apparatus is designed with multi-functional detection capabilities that can handle various types of defacement (contamination, wrinkles, folds, toughness changes) using a single integrated system. The control unit universally processes different detection results to determine defacement degree, allowing the system to accurately differentiate between different forms of damage while maintaining a unified detection architecture.
2Measurement precision
If the apparatus detects defacement based on brightness of non-printed parts, then the detection method is simple, but it cannot accurately determine paper sheets contaminated in printed parts or officially sealed notes
Solution Approach 1:
The patent applies different detection strategies to different regions of the paper sheet. For non-printed parts, it uses brightness and rugosity detection; for printed parts, it analyzes shading characteristics and variance values; for toughness changes, it uses sound intensity detection. This localized approach allows the apparatus to accurately detect defacement across various regions and types of damage.
Solution Approach 2:
The apparatus employs multiple detection parameters (brightness, rugosity, sound intensity, shading characteristics, variance values) to detect different aspects of defacement. By changing detection parameters based on the type of defacement and paper sheet region, the system achieves high accuracy across diverse detection scenarios including contamination, wrinkles, folds, and toughness changes.
3Reliability
If multiple detection methods are combined to improve determination accuracy, then the detection capability is enhanced, but the device complexity and processing requirements increase
Solution Approach 1:
The patent integrates multiple detection methods (acoustic toughness detection, optical non-printed part detection, and printed part analysis) into a single unified apparatus. The control unit combines results from all detection methods to determine the defacement degree, achieving high reliability through comprehensive analysis while maintaining a consolidated system architecture rather than separate independent systems.
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
This approach allows for high-accuracy detection of defacement, including contamination and folds, using a single optical system and processing circuit, improving the reliability of determining the authenticity and condition of paper sheets.
Implementation Method 1
an image detection unit comprising a plurality of light sources to irradiate a surface of a paper sheet as an inspection target with light from two different directions, and a light receiving unit configured to receive reflected light from the surface of the paper sheet
Data Source
AI summary
According to one embodiment, a document handling apparatus includes an image detection unit including a plurality of light sources to irradiate a surface of a paper sheet as an inspection target with light from two different directions, and a light receiving unit configured to receive reflected light from the surface of the paper sheet, and configured to detect an image on the surface of the paper sheet, and a detected information processing unit configured process detected information from the image detection unit and determine a defacement degree of the paper sheet. The detected information processing unit is configured to detect gray contamination of the paper sheet from an image detected by simultaneously turning on the plurality of light sources and to detect wrinkles or folds of the paper sheet from an image detected by turning on one of the plurality of light sources.