Medium Conveyance Lift Detection for Bound Media
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Solution Overview
Problem
Existing medium conveying apparatuses struggle to accurately detect bound media, leading to potential damage during separation, and require improved abnormality control mechanisms.
Innovation Solution
The apparatus employs a pick roller, separation roller, conveyance roller, lift sensor, and passing sensor to detect a medium's lift and passing, with a processor determining if the medium is bound based on these detections, executing abnormality control when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single sensor is used to detect bound media, then the device complexity is reduced, but the measurement precision of bound medium detection deteriorates
Solution Approach 1:
The detection system is segmented into multiple sensors positioned at different locations: a first sensor detects medium passage, a second sensor detects medium lift, and a third sensor detects bound medium characteristics. This segmentation allows each sensor to specialize in detecting specific aspects of medium transport, improving overall detection precision without requiring a single complex sensor
Solution Approach 2:
The control unit acts as an intermediary that integrates signals from multiple sensors and applies logical processing to determine bound medium status. The control unit combines information from medium passage detection, lift detection, and bound medium detection to make a comprehensive determination, resolving the contradiction by coordinating multiple simple sensors rather than using one complex sensor
2Measurement precision
If multiple sensors are added to improve detection accuracy, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The detection functionality is segmented across three distinct sensors positioned at different locations in the conveyance path, allowing each sensor to perform a specific detection task with high precision while keeping individual sensor complexity low
Solution Approach 2:
The control unit continuously receives feedback from multiple sensors and processes the information to determine abnormality status. The system uses feedback from medium passage, lift, and bound medium detection to dynamically adjust control actions, improving detection accuracy through coordinated sensor feedback rather than increasing individual sensor complexity
3Productivity
If the separation roller operates aggressively to separate media, then the productivity increases, but the object-affected harmful factors increase due to media damage
Solution Approach 1:
The system performs preliminary detection of bound media using multiple sensors before the separation roller attempts to separate the media. By detecting bound medium characteristics in advance, the control unit can prepare appropriate control actions to prevent damage during separation
Solution Approach 2:
The control unit applies preliminary anti-action by detecting bound media before aggressive separation occurs and implementing control measures to prevent the harmful effect of damage. The system counteracts potential damage by identifying bound medium status ahead of time and adjusting separation operations accordingly
4Reliability
If abnormality control is implemented to prevent media damage, then the reliability improves, but the productivity decreases due to conveyance stopping
Solution Approach 1:
The control unit continuously monitors feedback from multiple sensors to detect bound medium status. By implementing real-time feedback control, the system can make informed decisions about when to execute abnormality control actions, improving reliability while minimizing unnecessary conveyance interruptions that would reduce productivity
Data Source
AI summary
A medium conveying apparatus includes a pick roller feeding a medium, a separation roller located on a downstream side of the pick roller, a conveyance roller located on a downstream side of the separation roller, a medium sensor being located on a downstream side of the separation roller and detecting the medium, a lift sensor detecting a lift of the medium on an upstream side of the conveyance roller, a passing sensor being located on an upstream side of the separation roller and detecting passing of the medium, and a processor to determine that the medium is a predetermined medium when a lift of the medium and passing of the medium are detected in a predetermined period after the medium is detected, and execute abnormality control when the medium is determined to be the predetermined medium.