Bill Processing Conveyance Speed Control for Fraud Prevention
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Solution Overview
Problem
Existing bill processing apparatuses are vulnerable to fraudulent activities where legitimate bills can be drawn out after authenticity judgment, as the conveyance speed is not effectively controlled to prevent such actions.
Innovation Solution
A paper sheet processing apparatus with a conveyance mechanism that includes a stepping motor, allowing the conveyance speed to be controlled by changing the pulse signal generation cycle, increasing the speed only after the authenticity judgment is completed, thereby preventing fraudulent drawing out of bills.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the conveyance speed is kept constant during the authenticity judgment process, then the reading accuracy is maintained, but the paper sheet remains vulnerable to fraudulent drawing out
Solution Approach 1:
The conveyance mechanism transitions from constant speed to variable speed operation. During the authenticity judgment process, the conveyance speed is maintained at a constant low speed to ensure reading accuracy. After judgment completion, the speed is dynamically increased to prevent fraudulent drawing out. This dynamic speed adjustment resolves the contradiction between maintaining judgment reliability and preventing fraud.
Solution Approach 2:
The conveyance mechanism operates in distinct periodic phases: a first conveyance phase at constant speed for accurate reading, followed by a second conveyance phase at increased speed for fraud prevention. This periodic action pattern allows the system to alternately prioritize reading accuracy and security, resolving the contradiction through time-based separation of functions.
2Object-affected harmful factors
If the conveyance speed is increased to prevent fraudulent drawing out, then security is improved, but the reading accuracy may be compromised
Solution Approach 1:
The conveyance process is segmented into two distinct phases: a first conveyance phase at constant speed specifically for accurate reading and judgment, and a second conveyance phase at increased speed for fraud prevention. By segmenting the process, the system ensures that high speed is only applied when it no longer compromises reading accuracy, thus resolving the contradiction between security and precision.
Solution Approach 2:
The authenticity judgment is performed as a preliminary action before the speed increase. The system first completes the reading and judgment process at constant speed, then subsequently increases the conveyance speed. This preliminary action sequence ensures that reading accuracy is never compromised, as the speed increase occurs only after the critical reading phase is complete.
3Stability of the object's composition
If the conveyance speed is controlled to be constant, then the processing stability is maintained, but the productivity is reduced due to slower overall processing
Solution Approach 1:
The conveyance system dynamically adjusts its operating characteristics based on process stage. During the reading phase, constant speed provides stability for accurate judgment. After judgment completion, the system transitions to variable speed operation, increasing the conveyance speed to improve overall processing throughput. This dynamic adaptation resolves the contradiction between stability and productivity.
Solution Approach 2:
The system maintains continuous conveyance operation without stopping, but varies the speed profile. The conveyance mechanism continuously moves the paper sheet through the system, first at constant speed for reading, then at increased speed for discharge. This continuous action with variable speed profile eliminates idle time while maintaining stability during critical operations, resolving the contradiction between stability and productivity.
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 apparatus effectively reduces opportunities for fraudulent activities by increasing the conveyance speed post-authenticity judgment, ensuring accurate processing and reliable feeding of bills into the housing part without compromising reading accuracy.
Implementation Method 1
a conveyance mechanism which is capable of conveying the paper sheet inserted from the insertion slot, allowing the conveyance speed to be controlled by changing the pulse signal generation cycle
Data Source
AI summary
A paper sheet processing apparatus capable of preventing a paper sheet from being drawn out by an unauthorized action. The bill processing device includes: an insertion slot into which a bill is inserted; a bill conveyance mechanism capable of conveying the bill having been inserted from the insertion slot; a bill reader reading the bill conveyed by the bill conveyance mechanism; an authenticity judging mechanism judging an authenticity of the bill read by the bill reader; and a pulse output part driving a motor for controlling conveyance speed of the bill by a motor of the bill conveyance mechanism. The pulse output part controls the conveyance speed by the bill conveyance mechanism after the completion of reading by the bill reader.