Banknote Sensor Dust Removal Using Distributed Suction Openings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Value document processing apparatuses face challenges in maintaining the cleanliness of optical sensors due to dust accumulation, which affects their authenticity checking and operational efficiency.
Innovation Solution
A method and apparatus that utilize a suction conduit system with movable suction openings and conduit portions along the transport path to actively remove dust from the area of the checking device, including a hand cleaning portion and multiple suction openings positioned strategically to prevent dust from reaching the sensors, ensuring effective dust removal and prolonged apparatus operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical sensors are used for checking value documents, then checking accuracy is improved, but dust accumulation on sensors worsens, requiring frequent cleaning
Solution Approach 1:
The suction openings are positioned along the transport path to proactively remove dust particles before they can reach and accumulate on the optical sensors. This preliminary cleaning action prevents dust accumulation rather than addressing it after it occurs.
Solution Approach 2:
Air flow acts as an intermediary medium to transport dust particles away from the optical sensors. The suction system creates air currents that carry dust particles through the suction openings, preventing direct contact between dust and sensitive sensor surfaces.
2Productivity
If checking devices are placed in the housing, then checking function is improved, but dust in the housing area worsens, reducing operational time
Solution Approach 1:
Multiple suction openings are positioned along the transport path to continuously and proactively remove dust particles from the housing interior before they can settle on checking devices. This maintains optimal operating conditions throughout the device's operational life.
Solution Approach 2:
The suction system operates continuously during value document transport, maintaining constant dust removal from the housing interior. This continuous action ensures that dust accumulation does not interrupt the checking function, maximizing operational time.
3Object-affected harmful factors
If multiple suction openings are positioned along the transport path, then dust removal effectiveness is improved, but device complexity worsens
Solution Approach 1:
The suction system is divided into multiple independent suction openings positioned at different locations along the transport path. Each opening handles dust removal in its specific zone, allowing the system to address dust accumulation at multiple points without requiring a single complex centralized system.
Solution Approach 2:
The suction conduit system serves multiple functions simultaneously: it removes dust from different areas of the housing, protects multiple checking devices, and operates throughout the entire transport path. This multi-functionality justifies the increased complexity by providing comprehensive dust protection.
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 solution effectively reduces dust accumulation in the housing and checking device area, enhancing the accuracy and longevity of value document processing by maintaining sensor cleanliness and reducing maintenance efforts.
Implementation Method 1
dust is sucked off at at least two different places on the transport path and/or through a hand cleaning portion having a suction opening movable, relative to the checking device, into the area of the checking device
Data Source
AI summary
A value document processing apparatus comprises an input for value documents to be processed, an output and/or a storage device for processed value documents, a transport device for singled transport of value documents from the input to the output or the storage device, a housing, a checking device arranged in the housing for checking value documents transported in singled form past it, and a suction conduit system for suction air which has a port for a suction unit for sucking air with dust out of the suction conduit system, and at least one hand cleaning portion connected to the port and having a suction opening movable in the area of the checking device, and/or at least two conduit portions connected to the port and having suction openings arranged at different portions of the transport path and directed onto the transport path.