Magnetic Property Determination Device for Paper Sheets
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Solution Overview
Problem
Conventional magnetic property determination apparatuses for paper sheets with multiple magnetic materials are complex and costly due to the need for multiple magnets and sensors, leading to increased size and complexity.
Innovation Solution
A magnetic property determination apparatus that uses a magnetization unit with strategically positioned magnets and magnetically permeable members to generate distinct magnetic field regions, allowing for the differentiation of high-coercive, middle-coercive, and low-coercive magnetic materials based on their magnetization directions and detection signals without requiring multiple sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple magnets and sensors are used to determine multiple types of magnetic materials, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The patent combines multiple magnets and sensors into a single integrated magnetization unit and detection unit. The magnetization unit includes multiple magnets (first magnet, second magnet, third magnet) and magnetically permeable members that work together to magnetize different magnetic materials in different directions. The detection unit includes multiple sensors (first sensor, second sensor, third sensor) that detect the magnetization states of different magnetic materials. This merging allows the system to determine multiple types of magnetic materials with different coercive forces using a unified structure rather than separate measurement systems.
Solution Approach 2:
The magnetization unit is designed to perform multiple functions: it can magnetize high-coercive force magnetic materials, middle-coercive force magnetic materials, and low-coercive force magnetic materials in different directions using the same unit. The detection unit similarly performs multiple detection functions for different magnetic material types. This multi-functionality eliminates the need for separate dedicated systems for each magnetic material type, reducing overall device complexity while maintaining measurement precision.
2Measurement precision
If multiple magnets and sensors are used to detect different magnetic materials, then the measurement precision is improved, but the size of the apparatus increases
Solution Approach 1:
The patent merges multiple magnets (first, second, and third magnets) and magnetically permeable members into a single compact magnetization unit. Similarly, multiple sensors are integrated into a single detection unit. This consolidation reduces the overall volume required compared to having separate dedicated systems for each magnetic material detection, while still maintaining the capability to detect multiple types of magnetic materials with different coercive forces.
Solution Approach 2:
The patent utilizes different spatial arrangements and dimensional configurations for the magnets and sensors. The magnets are positioned at different locations (first magnet at one position, second and third magnets at another position) and oriented in different directions to create distinct magnetic field patterns. This dimensional arrangement allows multiple detection functions to be packed into a compact volume, reducing apparatus size while maintaining measurement precision.
3Measurement precision
If multiple magnets and sensors are used to determine magnetic materials, then the measurement precision is improved, but the manufacturing cost increases
Solution Approach 1:
The patent combines multiple magnets and sensors into integrated units, reducing the total number of separate components that need to be manufactured and assembled. The magnetization unit and detection unit are designed as integrated modules that can be manufactured together, potentially reducing manufacturing complexity and cost compared to producing separate dedicated systems for each magnetic material type.
Solution Approach 2:
The magnetization unit and detection unit are designed as universal multi-functional systems that can determine multiple types of magnetic materials with different coercive forces using the same hardware infrastructure. This universality eliminates the need for multiple separate systems, reducing overall manufacturing costs while maintaining the precision required for detecting different magnetic material types.
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 determines the type of magnetic materials by controlling magnetization directions and detecting variations in the bias magnetic field, reducing the size and cost while maintaining accuracy in distinguishing between different coercive forces.
Implementation Method 1
a magnetization unit (3) that magnetizes a magnetic material included in the paper sheet (100) in a magnetization direction
Implementation Method 2
generate distinct magnetic field regions, allowing for the differentiation of high-coercive, middle-coercive, and low-coercive magnetic materials based on their magnetization directions
Implementation Method 3
a magnetic detection unit (2) that detects the magnetism based on a variation of the bias magnetic field
Implementation Method 4
The first and second magnetic field regions are generated by shifting in the transport direction the magnet arranged above the transport path and the another magnet arranged below the transport path
Data Source
Figure 1A~1B
Figure 2
Figure 3A~3D
AI summary
A magnetic property determination apparatus that determines the magnetic materials on a paper sheet transported through a transport path includes a magnetization unit and a magnetic detection unit. The magnetization unit generates a magnetization magnetic field including a first magnetic field region and a second magnetic field region on the transport path. A magnetic field intensity and a magnetic field direction are set different between the first magnetic field region and the second magnetic field region so that the magnetic materials are magnetized in different magnetization directions depending on coercive forces of the magnetic materials. The magnetic detection unit that generates a bias magnetic field on the transport path downstream in a transport direction of the magnetization unit, and that detects a magnetic charge of the magnetic materials by detecting variations of the bias magnetic field.