Magnetic Field Detection Using Dynamic Sample-Stage Positioning
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Solution Overview
Problem
The use of multiple magnetic sensors increases cost and deteriorates detection accuracy due to characteristic variations between sensors.
Innovation Solution
A magnetic field detection system with a shield box, a magnetic sensor, and a sample stage, utilizing drive mechanisms to vary the relative positional relationship between the sample stage and shield box, allowing wide-range magnetic field measurement with a single or reduced number of sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple magnetic sensors are arranged in the measurement space, then wide-range detection of foreign objects is enabled, but cost increases and detection accuracy deteriorates due to characteristic variations between sensors
Solution Approach 1:
The system makes the measurement space dynamic by moving the sample stage relative to the magnetic sensor. The sample stage can be positioned at multiple locations within the measurement space, allowing a single magnetic sensor to effectively scan and detect foreign objects across the entire measurement space. This dynamic positioning replaces the need for multiple stationary sensors, thereby maintaining wide detection coverage while avoiding the accuracy deterioration caused by sensor characteristic variations.
2Area of stationary object
If multiple magnetic sensors are arranged in the measurement space, then wide-range detection of foreign objects is enabled, but cost increases
Solution Approach 1:
The invention employs a dynamic sample stage that can be positioned at multiple locations within the measurement space. By moving the sample stage to different positions, a single magnetic sensor can effectively monitor the entire measurement space. This dynamic approach eliminates the need for multiple magnetic sensors, thereby reducing the quantity of sensors required while maintaining wide detection coverage.
3Measurement precision
If a single magnetic sensor is used, then cost is reduced and detection accuracy is improved, but wide-range magnetic field measurement becomes difficult
Solution Approach 1:
The system resolves this contradiction by making the measurement configuration dynamic. The sample stage can be moved to multiple predetermined positions within the measurement space, allowing a single magnetic sensor to effectively scan and measure magnetic fields across the entire measurement space. This dynamic positioning enables wide-range measurement capability while maintaining the advantages of using only one high-precision magnetic sensor.
Solution Approach 2:
The invention adds the dimension of time and spatial movement to the measurement process. Instead of having multiple sensors covering the space simultaneously, the system uses a single sensor that moves through different spatial positions (adding the dimension of motion) to cover the entire measurement space. This transforms a static multi-sensor spatial arrangement into a dynamic single-sensor scanning approach, achieving wide-range measurement with a single sensor.
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
Enables wide-range magnetic field measurement while reducing the number of magnetic sensors, thereby lowering costs and preventing accuracy deterioration from sensor variations.
Implementation Method 1
a magnetic shield surrounding a measurement space
Implementation Method 2
a magnetic sensor fixed to the shield box in the measurement space
Data Source
AI summary
To provide a magnetic field detection system capable of achieving wide-range magnetic field measurement while reducing the number of magnetic sensors to be used. A magnetic field detection system includes: a shield box having magnetic shields surrounding ameasurement space; a magnetic sensor fixed to the shield box in the measurement space; a sample stage inserted at least at a part thereof into the measurement space; and drive mechanisms for varying the relative positional relationship between the sample stage and shield box. The relative positional relationship between the sample stage and shield box can thus be varied by the drive mechanisms, thus enabling magnetic field measurement over a wide range by using a single or a small number of magnetic sensors.