Wireless Flexible Magnetic Sensor Aerogel Substrate
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Solution Overview
Problem
Current magnetic sensors lack the capability for wireless, flexible, high-resolution, non-contact detection of the spatial distribution of alternating magnetic fields, particularly strong and high-frequency fields, which are crucial in various technological and scientific applications.
Innovation Solution
A wireless flexible magnetic sensor based on the magnetothermal effect is developed, utilizing an aerogel substrate with magnetothermal effect magnetic nanoparticles that generate heat in response to alternating magnetic fields, measured using an infrared camera to determine the field strength's spatial distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional magnetic sensors are used, then magnetic field detection is achieved, but wireless capability, flexibility, and high-resolution spatial distribution detection are lacking
Solution Approach 1:
The patent replaces traditional electrical connection and signal transmission mechanisms with a magnetothermal effect-based wireless detection system. Magnetic nanoparticles convert magnetic field energy to thermal energy, which is then detected by infrared camera without requiring physical electrical contacts, thereby achieving wireless operation and simplified system structure while maintaining high measurement precision
Solution Approach 2:
The patent utilizes the magnetothermal effect parameter change - converting magnetic field strength into temperature changes. By measuring temperature distribution through infrared detection, the system achieves high-resolution spatial distribution detection of magnetic fields without complex sensor arrays, resolving the contradiction between measurement precision and device complexity
2Adaptability or versatility
If contact-based detection methods are used, then detection accuracy is achieved, but flexibility and adaptability to complex surfaces are limited
Solution Approach 1:
The patent employs flexible aerogel substrate containing magnetic nanoparticles that can conform to complex curved surfaces. This flexible structure maintains close contact with irregular surfaces while enabling wireless magnetic field detection, thereby achieving both high adaptability and detection accuracy without the rigidity constraints of traditional sensors
Solution Approach 2:
The patent replaces mechanical contact-based electrical sensors with wireless magnetothermal detection. The infrared camera detects thermal radiation from magnetic nanoparticles without physical contact, allowing the flexible sensor to adapt to various surfaces while maintaining detection accuracy through non-contact measurement
3Area of stationary object
If conventional sensor arrays are deployed for spatial distribution detection, then detection coverage is improved, but device complexity and contact requirements increase
Solution Approach 1:
The patent creates a universal detection platform where magnetic nanoparticles embedded in flexible aerogel can detect magnetic fields across large areas. The same material system provides both spatial distribution detection and wireless operation capabilities, eliminating the need for complex multi-component sensor arrays while expanding detection coverage
Solution Approach 2:
The patent replaces complex electrical sensor arrays with a simplified magnetothermal detection system. Infrared camera captures thermal radiation patterns from magnetic nanoparticles distributed across the detection area, achieving wide-area spatial distribution detection with minimal device complexity and no contact requirements
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
This solution enables wireless, flexible, high-resolution, and non-contact detection of alternating magnetic fields, filling the existing gap in technology and offering a wide range of applications, including the detection of strong and high-frequency fields.
Implementation Method 1
Ultrafine magnetic nanoparticles will undergo relaxation under the action of an alternating magnetic field, and the heat generated is directly related to the strength of the alternating magnetic field
Implementation Method 2
Infrared detection is an emerging, non-contact and non-destructive detection technology, which is real-time, accurate, fast, and highly sensitive
Data Source
AI summary
The present disclosure provides a wireless flexible magnetic sensor based on magnetothermal effect, and a preparation method and a detection method thereof. The magnetic sensor includes an aerogel substrate, and magnetic nanoparticles having magnetothermal effect that are attached to a surface of the aerogel substrate. The magnetic sensor is placed in the alternating magnetic field to be measured, and then a trigger signal is generated by a data collecting device and sent to an infrared camera. The infrared camera can collect temperature distribution information at different instants of time from the surface of the magnetic sensor. A curve of temperature rise changes at different positions on the surface of the magnetic sensor can be obtained by analyzing a temperature distribution image captured by the infrared camera. Thus, a spatial distribution of the strength of the alternating magnetic field at different positions on the surface of the sensor can be determined.