Valuable Document Identification Using Multi-Stage Image Collection
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Solution Overview
Problem
The existing valuable document identifying system based on point triggering strategy suffers from false triggering, incomplete information collection, low identification rate, adaptability issues due to fixed collecting time, and inaccurate counting of partially adhered documents.
Innovation Solution
A system and method that replaces thru-beam sensors with a central controller and multiple-stage image collecting units, using similarity matching between image blocks and background images to determine document arrival and passage, allowing for adaptive collecting time and accurate counting of documents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If point triggering strategy with thru-beam sensors is used, then the system can detect document arrival and passage, but false triggering occurs when detecting points are located on transparent holes of documents
Solution Approach 1:
The patent divides the document detection into multiple stages: front end position detection for arrival triggering, middle stage information collection, and rear end position detection for passage triggering. This segmentation ensures that detection is performed at multiple points along the document transmission path, reducing false triggering from transparent holes at any single location.
Solution Approach 2:
The patent introduces a central controller as an intermediary that coordinates the triggering signals from front and rear position detectors, manages the information collection process, and ensures proper sequencing. This intermediary layer prevents false triggering by validating signals and maintaining system state consistency.
2Productivity
If point triggering strategy is used, then the system can start and stop information collection, but information is not collected completely when triggering points are on transparent holes
Solution Approach 1:
The front position detector triggers the information collection process in advance when the document arrives at the detection point. This preliminary triggering ensures that the collecting device is ready and starts collecting information as the document enters the effective detecting region, preventing information loss that would occur with delayed triggering from transparent hole detection.
Solution Approach 2:
The information collection process runs continuously from document arrival until the document passes the rear position detector. This continuous collection ensures that all document information is captured regardless of triggering issues at specific points, eliminating gaps that would occur with point-based triggering alone.
3Ease of operation
If fixed collecting time T is used, then the system can control information collection duration, but adaptability to various document sizes is reduced
Solution Approach 1:
The system dynamically adjusts the information collection duration based on real-time document transmission status. The collecting device operates from document arrival (triggered by front position detector) until document passage is confirmed (triggered by rear position detector), rather than using a fixed time T. This dynamic adjustment maintains ease of operation through automated control while achieving full adaptability to various document sizes and transmission speeds.
4Productivity
If front and rear counters are used separately, then the system can track document passage, but counting accuracy is reduced for partially adhered documents
Solution Approach 1:
The patent merges the counting functions of front and rear detectors into a unified counting process managed by the central controller. Both detectors contribute to a single document count when they jointly confirm complete document passage, preventing double-counting of adhered documents while maintaining accurate tracking of individual document flow through the system.
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
Reduces false triggering, ensures complete information collection, improves identification rate, adapts to various document sizes, and accurately counts partially adhered documents, enhancing system reliability and efficiency.
Implementation Method 1
Photoelectric thru-beam sensors are arranged at the front end and rear end of the identifying device as position detector
Data Source
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Figure 5(a)~5(b)
AI summary
A valuable document identification method and an identification system thereof are provided. The method involves an information collecting module for identifying valuable documents starts, after a banknote separation module for storing valuable documents starts; informationis sequentially collected by the information collecting module along movement direction of valuable documents; after arrival an pass of valuable documents are inspected, the colleted valuable document identification information is processed and identified by the identification module, and an identification result is obtained; the valuable document information state is recorded; valuable documents are counted based on the identification result and the valuable document information state, and then valuable documents are identified and judged. As a results, the reliability of the valuable document identification process is improved, and the fault rate due to the counting problem is reduced.