Bill Softness Recognition via Mechanical Force Sensing
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Solution Overview
Problem
Existing financial bill processing systems face challenges in accurately and efficiently recognizing bill softness due to low accuracy, low speed, and poor anti-interference performance, particularly with soft new bills that are affected by moisture and noise interference.
Innovation Solution
A bill softness recognition method and device that involves receiving and separating bills, capturing images, rolling bills to press prearranged force sensors, acquiring and processing force signals, and determining the softness based on inclination angles and preset conditions, effectively distinguishing soft bills without interference from sound or noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sound-based recognition method is used to detect soft bills, then soft bills can be recognized, but accuracy and stability are seriously affected by noises in various changeable frequencies
Solution Approach 1:
The patent replaces the acoustic detection system with a mechanical detection system. Instead of using sound waves to detect bill softness, the invention employs a mechanical pressing mechanism where a pressing element directly contacts and presses the bill surface. Force sensors measure the mechanical force required to press the bill, providing a direct mechanical measurement that is immune to acoustic noise interference while accurately detecting bill softness characteristics.
2Productivity
If existing sensors (thickness, magnetic, ultraviolet, infrared, touch image) are used for bill recognition, then various bill properties can be detected, but rapid recognition of bill softness with small amount of information is not achieved
Solution Approach 1:
The patent extracts and focuses exclusively on the softness detection function, removing unnecessary complex sensing mechanisms. By using a simple mechanical pressing element combined with force sensors, the system achieves rapid detection speed while maintaining high softness recognition accuracy. The design eliminates redundant sensor types and processes, keeping only the essential mechanical pressing and force measurement components needed for softness detection.
3Measurement precision
If high definition touch image sensor is used, then new bills and old bills can be distinguished, but soft new bills affected by moisture cannot be recognized
Solution Approach 1:
The patent changes the detection parameter from visual appearance (image-based) to mechanical force response (force-based). Instead of relying on image characteristics that may not distinguish softness, the system measures the force required to press the bill surface. This parameter change enables detection of softness properties including moisture-affected soft new bills, as the mechanical force measurement directly reflects the bill's physical softness state regardless of visual appearance.
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 method provides rapid, accurate, and stable recognition of bill softness, improving upon existing systems by reducing interference and enhancing detection speed and accuracy.
Implementation Method 1
acquiring effective force signals fed back from the force sensors
Data Source
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AI summary
A bill softness recognition method and device, so as to solve the problems that the accuracy of the existing bill softness detection is low, the speed is slow and the anti-interference performance is poor. The method comprises: receiving bills (101); extracting bills and dividing the bills, so that the bills enter a bill channel in a separated way (102); collecting a single bill image of an extracted bill and a corresponding bill background image (103); rotating the bill to make the bill press multiple preset force sensors (104); acquiring effective force signals fed back by the force sensors (105); acquiring the oblique angle of the bill according to the single bill image and the corresponding bill background image (106); determining, according to the oblique angle, the effective force sensors pressed by the bill (107); and determining whether the effective force signals of the effective force sensors meet a preset softness condition, and if yes, determining that the bill is a soft bill (108).