Paper Jam Detection via Optical Wrinkle Verification
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Solution Overview
Problem
Existing paper conveying systems often erroneously detect jams due to wrinkles in the paper, leading to incorrect sound-based jam detection.
Innovation Solution
Incorporating a wrinkle detector downstream of the paper conveyance path, which optically detects wrinkles and adjusts the jam detection method to differentiate between paper jams and wrinkles, thereby reducing erroneous sound-based jam detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If sound-based jam detection is used to quickly detect jams, then detection speed is improved, but false detection increases due to wrinkles generating similar sounds
Solution Approach 1:
The detection system is segmented into two independent detection mechanisms: sound-based detection for quick response and optical wrinkle detection for accuracy verification. The sound detector monitors conveyance path sounds while the optical detector specifically identifies wrinkles, allowing the system to differentiate between genuine jams and wrinkle-induced false alarms.
Solution Approach 2:
The optical wrinkle detector acts as an intermediary verification mechanism between the sound detection and final jam determination. When the sound detector identifies potential jam sounds, the optical detector serves as a mediator to confirm whether the cause is actually a wrinkle or a true jam, preventing false positives.
2Reliability
If the apparatus stops operation when a jam is detected, then operational safety is improved, but productivity decreases due to unnecessary shutdowns from false detections
Solution Approach 1:
The optical wrinkle detector performs preliminary verification before the final jam determination is made. By detecting wrinkles in advance and providing this information to the control unit, the system can prevent unnecessary shutdowns while maintaining safety for genuine jams, thus preserving productivity without compromising operational safety.
3Device complexity
If a single detection method is used to simplify the system, then device complexity is reduced, but detection precision deteriorates due to inability to distinguish wrinkles from jams
Solution Approach 1:
The detection system is divided into specialized components: a sound detector for acoustic monitoring and an optical wrinkle detector for visual inspection. Each detector is optimized for its specific function, with the sound detector capturing conveyance path sounds and the optical detector specifically identifying wrinkle characteristics, thereby achieving high discrimination precision.
Solution Approach 2:
The control unit serves multiple functions by integrating both sound-based jam detection and optical wrinkle detection results. It processes signals from both detectors, compares them against reference data, and makes the final determination, allowing a single control unit to handle multiple detection modalities without requiring separate complex control 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
The system effectively suppresses false jam detection caused by paper wrinkles, improving the accuracy of jam detection and preventing unnecessary apparatus shutdowns.
Implementation Method 1
a sound signal generator, provided with a sound detector provided at a downstream side of the separator in a paper conveyance direction, for generating a sound signal corresponding to a sound generated by a paper during conveyance of the paper
Implementation Method 2
a wrinkle detector, provided at a downstream side of the separator in the paper conveyance direction, for optically detecting a wrinkle of the paper
Data Source
AI summary
There are provided a paper conveying apparatus, a jam detection method and a computer-readable, non-transitory medium that can suppress erroneous detection of a jam by sound due to the sound which a paper which has a wrinkle generates. The paper conveying apparatus includes a separator, a sound signal generator, provided with a sound detector provided at a downstream side of the separator, for generating a sound signal in accordance with the sound generated by a paper during conveyance, a sound jam detector for determining whether a jam has occurred based on the sound signal, and a wrinkle detector, provided at a downstream side of the separator, for detecting optically a wrinkle of a paper, wherein the sound jam detector changes the method of detection of the jam when the wrinkle detector detects a wrinkle of a paper.