Search-Coil Sensor Modules for Precise Iron Object Tracking
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Solution Overview
Problem
Existing magnetic sensor technologies face challenges in detecting the location and movement of objects containing iron without altering the core and coil, and in preventing detection delays due to temporary magnetic field subsidence during pole changes.
Innovation Solution
A multi-measurement apparatus using search-coil type sensors with impedance matching units and amplifiers to detect fine changes in magnetic fields, allowing for continuous operation and accurate measurement of objects' positions and movement paths, regardless of sensor arrangement or environmental effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If search-coil type sensors are used to detect fine magnetic field changes of iron-containing objects, then measurement precision is improved, but device complexity increases due to impedance matching units and amplifiers
Solution Approach 1:
The system divides the detection task into multiple sensor modules, each independently equipped with impedance matching units and amplifiers. This segmentation allows each module to operate autonomously with optimized signal processing, improving overall measurement precision while distributing the complexity across modular units rather than a single complex system.
Solution Approach 2:
Impedance matching units serve as intermediary components between the sensors and amplifiers, optimizing signal transfer and reducing losses. This intermediary stage enables precise detection of fine magnetic field changes by ensuring maximum power transfer and minimal signal degradation before amplification.
2Measurement precision
If amplifiers are used to amplify fine current and voltage signals, then measurement precision is improved, but energy consumption increases
Solution Approach 1:
The system employs periodic sampling and signal processing techniques where amplifiers are activated only when changes in magnetic field are detected, rather than continuous operation. This periodic action maintains high measurement precision for fine signal detection while significantly reducing overall energy consumption by keeping amplifiers in low-power states during stable conditions.
Solution Approach 2:
The amplifiers dynamically adjust their gain and operating parameters based on the detected signal strength and environmental conditions. By changing operational parameters rather than maintaining fixed high-gain amplification, the system achieves precise measurement of fine signals only when necessary, reducing energy consumption during normal operating conditions.
3Adaptability or versatility
If multiple sensor modules are deployed to measure locations of multiple objects, then measurement capability is improved, but device complexity increases
Solution Approach 1:
Each sensor module is designed as a universal, multi-functional unit capable of detecting magnetic field changes from any iron-containing object regardless of position or orientation. This universality allows multiple identical modules to be deployed for multi-object tracking without increasing individual module complexity, as each module performs the same functions independently.
Solution Approach 2:
The system combines multiple sensor modules into a coordinated network where each module maintains independent functionality but contributes to collective multi-object measurement capability. By merging identical modular units rather than creating complex differentiated sensors, the system achieves versatile multi-object measurement while keeping individual module complexity manageable.
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 ultra-low power detection of fine magnetic field changes and flux quantities, maintaining performance across different environments and preventing detection delays, even during temporary magnetic field subsidence.
Implementation Method 1
the sensor modules have respective induced magnetic fields formed due to a change in distance from the objects containing iron (Fe) and measure movement of one or more of the objects
Data Source
AI summary
A multi-measurement apparatus using a search-coil type sensor includes: sensor modules, each of which has one or more sensors including respective housings having respective inner spaces, respective cores formed to be inserted into the inner spaces of the housings, and respective coils which are each wound around a portion of an outer circumferential surface of each of the housings, the portion corresponding to a position of each of the cores; impedance matching units that are connected to a plurality of the sensors, respectively, and perform impedance matching; and amplifiers that are connected to the impedance matching units, respectively, and amplify a fine current and voltage generated during approach of objects to the sensors.