Sound Jam Detection in Paper Conveyance Systems
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Solution Overview
Problem
Paper conveying apparatuses often mistakenly determine a jam due to the sound generated by moving members during paper conveyance, leading to incorrect jam detection.
Innovation Solution
The apparatus includes a moving member, a drive module, a sound signal generator, a sound jam detector, and a control module that determines whether a jam has occurred based on sound signals, using a different method when the drive module is driving the moving member to differentiate between jam sounds and moving member sounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If sound-based jam detection is implemented, then jam detection speed is improved, but false detection increases due to moving member sounds
Solution Approach 1:
The patent applies dynamics by making the detection method adaptable to different operational states. The control module dynamically switches between a first determination method (when moving member is stationary) and a second determination method (when moving member is driven), allowing the system to maintain high detection speed while avoiding false alarms from moving member sounds during operation.
Solution Approach 2:
The patent changes the detection parameters based on the operational state of the moving member. When the moving member is driven, the system uses a second determination method with adjusted sound threshold criteria, allowing it to tolerate higher sound levels during operation while still detecting actual jams, thus maintaining both speed and accuracy.
2Reliability
If continuous jam detection is performed, then detection reliability is improved, but energy consumption increases
Solution Approach 1:
The patent implements periodic action by performing sound-based jam detection only at specific intervals and conditions rather than continuously. The control module activates the sound jam detector based on the operational state of the moving member, performing detection when the moving member is stationary or in specific states, thereby maintaining reliable detection while reducing overall energy consumption.
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 effectively suppresses mistaken jam detection by distinguishing between sounds caused by paper conveyance and those generated by moving members, improving the accuracy of jam detection in paper conveying systems.
Implementation Method 1
a sound signal generator for generating a sound signal corresponding to a sound generated by a paper during conveyance of the paper
Data Source
AI summary
There is provided the paper conveying apparatus, jam determining method, and computer program, which can suppress the mistaken determining of the occurrence of a jam by sound due to a sound generated by a moving member driven in relation to conveyance of a paper. The paper conveying apparatus according to an embodiment includes a moving member driven in relation to conveyance of a paper, a drive module for driving the moving member, a sound signal generator for generating a sound signal corresponding to a sound generated by a paper during conveyance of the paper, a sound jam detector for determining whether a jam has occurred based on the sound signal, and a control module for stopping conveyance of a paper when the sound jam detector determines that a jam has occurred. The control module controls so that the sound jam detector determines whether a jam has occurred by a determining method different from a determining method used while the drive module is not driving the moving member, or the sound jam detector does not determine whether a jam has occurred, while the drive module is driving the moving member.