Multi-feed Detection via Width and Overlap Sensor Fusion
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Solution Overview
Problem
Existing medium conveying apparatuses face challenges in accurately detecting multi-feed conditions, where multiple media are conveyed overlappingly, leading to inefficient processing and potential damage, as they rely on single detection methods that may fail to distinguish between adhered objects and actual multi-feeds.
Innovation Solution
A medium conveying apparatus equipped with a conveying roller, a width detection sensor, and an overlap detection sensor, where a processor determines abnormality processing based on the width and overlap detection widths, executing processing when the two widths are equal to prevent multi-feed issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single detection method is used to detect multi-feed, then the device complexity is reduced, but the measurement precision and reliability of multi-feed detection deteriorate
Solution Approach 1:
The detection system is segmented into two independent detection methods: width detection (using width detection sensors) and overlap detection (using overlap detection sensors). Each sensor type focuses on a specific aspect of medium detection, and their results are integrated by the processor to determine multi-feed conditions, thereby improving overall detection accuracy without requiring a single complex sensor system
Solution Approach 2:
The patent merges the results from width detection and overlap detection into a unified multi-feed determination system. The processor combines detection signals from both sensor types to make a comprehensive judgment about multi-feed conditions, achieving higher reliability through synthesis of multiple detection perspectives
2Device complexity
If width detection alone is used, then the device complexity is reduced, but the reliability of multi-feed determination deteriorates
Solution Approach 1:
The system continuously monitors both width and overlap detection signals during medium conveyance. The processor uses feedback from both sensor types to dynamically determine multi-feed conditions, adjusting the conveyance state based on real-time detection results from both width and overlap sensors
3Device complexity
If overlap detection alone is used, then the device complexity is reduced, but the measurement precision of medium width detection deteriorates
Solution Approach 1:
The detection system is designed with multi-functionality where both width detection sensors and overlap detection sensors contribute to multiple detection objectives. The width detection sensors not only measure medium width but also provide information about medium position, while overlap detection sensors detect both overlap conditions and medium presence, creating a universal detection system
Data Source
AI summary
A medium conveying apparatus includes a conveying roller to convey a medium, a width detection sensor for detecting a width of the medium conveyed by the conveying roller in a direction perpendicular to a conveying direction, an overlap detection sensor for detecting an overlap of the medium conveyed by the conveying roller, and a processor to determine whether to execute an abnormality processing for a multi-feed, based on the width of the medium acquired based on a detection result by the width detection sensor and a detection result by the overlap detection sensor. The processor acquires an overlap detection width being a width in which the medium is estimated to overlap in the direction perpendicular to the conveying direction, based on the detection result by the overlap detection sensor. The processor executes the abnormality processing when the width of the medium and the overlap detection width are equal.