Adjustable Banknote Separation Wheel Velocity Control
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Solution Overview
Problem
Existing sheet matter separation mechanisms face challenges in maintaining consistent spacing between media of different lengths, leading to increased rejection rates and inefficient resource use due to varying wheel sizes and motor loads.
Innovation Solution
A sheet matter separation mechanism that adjusts the relative velocity between the banknote separating wheel and the driving wheel motor based on preset velocity adjusting regions, using sensors to detect medium position and control the separation spacing, ensuring consistent spacing between separated media.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the banknote separating wheel rotates at constant velocity to separate one sheet medium per rotation, then the separation mechanism is simple, but the wheel volume and moment of inertia become very large for long sheet media like cheques
Solution Approach 1:
The patent applies dynamics by making the banknote separating wheel velocity adjustable rather than constant. The control unit dynamically adjusts the rotating velocity based on the length of the sheet medium being processed. For longer media like cheques, the velocity is reduced, allowing adequate separation spacing without requiring an excessively large wheel diameter. This resolves the contradiction by making the wheel size feasible while maintaining proper separation through velocity control.
2Manufacturing precision
If the banknote separating wheel diameter is increased to accommodate long sheet media separation, then adequate spacing is achieved, but the moment of inertia increases and motor load increases
Solution Approach 1:
The patent changes the velocity parameter of the banknote separating wheel based on the sheet medium length. Instead of using a large-diameter wheel to achieve spacing, the system maintains a compact wheel diameter and achieves proper spacing by adjusting the rotating velocity downward for longer media. The control unit calculates the appropriate velocity to ensure the wheel completes exactly one rotation per sheet separation, maintaining consistent spacing without increasing wheel size or motor load.
3Productivity
If the spacing between separated sheet media is reduced, then resource efficiency improves, but the response time of the inverter becomes insufficient causing crashes
Solution Approach 1:
The patent implements feedback control where the control unit continuously monitors the separation process and adjusts the banknote separating wheel velocity in real-time. Based on detected sheet medium length and position, the system dynamically modifies the rotation speed to maintain optimal spacing. This feedback mechanism ensures that spacing is reduced efficiently without causing crashes, as the velocity adjustment compensates for the reduced time available for inverter response during faster separation cycles.
Data Source
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AI summary
A sheet medium separating mechanism and a control method and a control system thereof. When the head part of a currently separated medium reaches the front boundary of a preset speed regulating region in front of a money distributing wheel (111) and the tail part of the currently separated medium leaves the back boundary of a preset speed regulating region on the money distributing wheel, relative speeds of a money distributing wheel motor (122) and a back money distributing power wheel motor (120) are regulated, so that a preset medium separating distance is kept between the tail part of the currently separated medium and the head part of a next separated medium. Therefore, the sheet medium separating mechanism is adapted to sheet media of different shapes and different specifications, the money distributing wheel size and rotary inertia of longitudinal deposit equipment are reduced, and the motor load is effectively lowered.