GMI Bio-Magnetic Sensor with Magnetic Bead Concentration
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Solution Overview
Problem
Current bio-magnetic detection sensors based on the GMI effect of magnetic metallic fibers face challenges in detecting weak magnetic fields due to small magnetic field strengths in organisms, requiring appropriate magnetic-bead concentrations and simulated lesion shapes for accurate detection.
Innovation Solution
A GMI bio-magnetic measuring device incorporating a magnetic-bead-concentration adjustable platform and a lesion shape simulation platform, utilizing a metallic fiber, impedance analyzer, Helmholtz coil, fluxgate uniaxial magnetometer, and data acquisition system to measure magnetic impedance changes, allowing for precise detection of magnetic-bead concentrations and simulated lesion shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnetic metallic fiber is used as GMI sensor material, then sensitivity and magnetic properties are improved, but detection of weak magnetic fields in organisms remains difficult due to extremely small magnetic field strength
Solution Approach 1:
Magnetic beads are introduced as intermediary markers that concentrate and amplify the weak magnetic field signals from organisms. The beads serve as mediators between the biological target and the GMI sensor, converting faint biological magnetic fields into detectable signal variations through their magnetic properties and concentration effects.
Solution Approach 2:
The patent optimizes key parameters including magnetic bead concentration (0.1-10 μL/mL), frequency (1-100 MHz), and external magnetic field strength (0.01-10 Oe) to maximize detection sensitivity. By adjusting these parameters, the system achieves optimal signal-to-noise ratio for detecting extremely weak biological magnetic fields.
2Measurement precision
If magnetic-bead concentration is increased to enhance detection accuracy, then measurement precision improves, but device complexity and optimization requirements increase
Solution Approach 1:
The system employs dynamic adjustment of magnetic bead concentration based on detection requirements. The concentration can be varied from 0.1 to 10 μL/mL depending on the specific application, allowing optimization for different detection scenarios without requiring multiple fixed-concentration systems.
Solution Approach 2:
Magnetic beads are pre-concentrated and prepared at known concentrations before introduction to the detection system. This preliminary preparation simplifies the detection process by eliminating the need for real-time concentration adjustment during measurement, reducing operational complexity.
3Adaptability or versatility
If different lesion shapes are simulated to study magnetic field distribution, then measurement versatility improves, but device complexity and simulation requirements increase
Solution Approach 1:
The lesion simulation is segmented into basic geometric shapes (spherical, cylindrical, irregular) that can be constructed from simple magnetic bead arrangements. This segmentation approach allows versatile shape simulation using standardized building blocks rather than requiring complex dedicated fixtures for each shape type.
Solution Approach 2:
A single simulation platform is designed to handle multiple lesion shapes and detection scenarios through programmable magnetic bead positioning and adjustable detection parameters. This universal platform replaces the need for separate dedicated systems for each lesion type, reducing overall complexity while maintaining versatility.
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 sensitive and accurate detection of magnetic-bead concentrations and lesion shape changes, improving the sensitivity and response speed of bio-magnetic measurements, laying a foundation for developing micro bio-magnetic measuring sensors.
Implementation Method 1
A magnetic metallic fiber has attracted attention from the academic community due to its size and the magnetic properties exhibited by its microstructure, especially due to a Giant magnetoimpedance (GMI)
Implementation Method 2
The magnetic-bead-concentration adjustable platform or the lesion shape simulation platform is placed at the interior of the Helmholtz coil
Implementation Method 3
A probe of the fluxgate uniaxial magnetometer is disposed in an internal uniform magnetic field area of the Helmholtz coil
Data Source
AI summary
A GMI bio-magnetic measuring device based on a magnetic-bead concentration and a simulated lesion shape, includes an impedance analyzer, a Helmholtz coil, a metallic fiber, a fluxgate uniaxial magnetometer, a data acquisition card, a computer, a magnetic-bead-concentration adjustable platform and a lesion shape simulation platform. The metallic fiber is fixedly disposed on the magnetic-bead-concentration adjustable platform or the lesion shape simulation platform. Two terminals of the metallic fiber are electrically connected with a connection terminal of the magnetic-bead-concentration adjustable platform or the lesion shape simulation platform, and then are electrically connected with an input end of the impedance analyzer. An output end of the impedance analyzer is electrically connected with the computer. The magnetic-bead-concentration adjustable platform or the lesion shape simulation platform is placed at the interior of the Helmholtz coil. A probe of the fluxgate uniaxial magnetometer is disposed at the interior of the Helmholtz coil.