Banknote Storage Roller Speed Control for Belt Tension
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Solution Overview
Problem
Conventional banknote temporary storage devices face issues with loose or cast coiling belts due to non-constant belt speeds caused by changing roller diameters, leading to uneven banknote spacing and reduced storage capacity, along with increased maintenance costs.
Innovation Solution
A banknote temporary storage device with real-time adjustment of drive motor angular speeds, utilizing sensors and a control system to calculate and maintain constant linear speeds of the coiling belt by determining real-time radii of the rollers and adjusting motor speeds accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the coiling belt is constantly tightened to improve tenseness and storage capacity, then the storage capacity of the storage roller is improved, but the linear speed of the storage roller and belt standby roller becomes inconsistent causing loose or cast of the coiling belt
Solution Approach 1:
The patent applies dynamics by making the rotating speeds of the storage roller and belt standby roller adjustable in real-time. As the coiling belt is deployed or retracted changing the effective radius, the control system dynamically adjusts the motor speeds to maintain constant linear speed. This resolves the contradiction by allowing the system to adapt its parameters (speeds) in response to changing conditions (radius) while maintaining the belt tightened state for maximum storage capacity.
Solution Approach 2:
The patent implements feedback control where the control system continuously monitors the deployment state of the coiling belt and adjusts the rotating speeds of the storage roller and belt standby roller accordingly. The feedback mechanism ensures that the linear speeds remain consistent despite changes in roller radius, preventing belt looseness or casting while maintaining the belt in a tightened state for optimal storage capacity.
2Device complexity
If empirical values are used to estimate radius increment, then the control method is simple, but the linear speed consistency between storage roller and belt standby roller is insufficient causing belt loose or cast
Solution Approach 1:
The patent replaces the empirical estimation method with a calculation-based approach using the circular motion principle (v = ωr). Instead of relying on predetermined empirical values, the system calculates the required angular speeds based on the actual radius measurements and the desired constant linear speed. This substitution of calculation for empirical estimation improves belt stability while keeping the control system relatively simple.
Solution Approach 2:
The patent changes the control parameter from fixed empirical radius increment values to dynamically calculated values based on actual radius measurements. By using the formula v = ωr, the system adjusts the angular speed parameter (ω) according to the measured radius (r) to maintain constant linear speed (v), thereby improving belt stability without significantly increasing system complexity.
3Ease of operation
If the linear speed of storage roller differs significantly from belt standby roller, then the control is easier, but unequal spaces between banknotes occur reducing storage capacity and causing belt waste
Solution Approach 1:
The patent applies dynamics by making the rotating speeds of the storage roller and belt standby roller adjustable in real-time. As the coiling belt is deployed or retracted changing the effective radius, the control system dynamically adjusts the motor speeds to maintain constant linear speed. This resolves the contradiction by allowing the system to adapt its parameters (speeds) in response to changing conditions (radius) while maintaining the belt in a tightened state for maximum storage capacity.
Solution Approach 2:
The patent implements feedback control where the control system continuously monitors the deployment state of the coiling belt and adjusts the rotating speeds of the storage roller and belt standby roller accordingly. The feedback mechanism ensures that the linear speeds remain consistent despite changes in roller radius, preventing belt looseness or casting while maintaining the belt in a tightened state for optimal storage capacity.
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
Ensures constant linear speed of the coiling belt, preventing belt slippage and cast, maintaining even banknote spacing, and enhancing storage capacity while reducing maintenance costs.
Implementation Method 1
a coiling belt with two ends fixed on the storage roller and the belt standby roller respectively, which is wound around, and is retracted and deployed between the storage roller and the belt standby roller
Data Source
Figure 1
Figure 2
AI summary
A paper money temporary storage device and a paper money storage method therefor. The paper money temporary storage device (100) comprises a signal collection unit. The signal collection unit comprises a coded disk (103), a coded disk signal sensor (104) and a rubber wheel (105), wherein the coded disk (103) and the rubber wheel (105) are arranged between a storage reel (109) and a belt standby reel (110) via the same rotating shaft; and a coiling belt (107) engages with the rubber wheel (105) closely and drives the rubber wheel (105) to rotate. The paper money temporary storage device (100) makes clever use of the structures of the rubber wheel (105) which is coaxial with the coded disk (103) and engages closely with the coiling belt, the coded disk (103) and the coded disk signal sensor (104), so that the number of rotation turns of the rubber wheel (105) can be obtained by way of recording the number of rotation turns of the coded disk (103), thereby calculating the real-time speed of the coiling belt (107) when each piece of paper money enters or rolls out, so as to obtain a real-time radius of the storage reel (109) or the belt standby reel (110), and, therefore, it can be ensured that the coiling belt (107) conducts a uniform motion at a target speed by way of adjusting an angular speed of a drive motor according to the real-time radius.