Acoustically Driven Ferromagnetic Resonance Sensor Arrays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing magnetic sensors, such as SERF and SQUID sensors, are large, complex, and difficult to integrate, while FMR sensors face challenges in being implemented in a flexible and portable manner suitable for various applications.
Innovation Solution
A magnetic sensor array circuit utilizing acoustically driven ferromagnetic resonance (ADFMR) sensors, integrated into a compact circuit system that enables multidimensional measurement of electromagnetic field properties, with features like time and frequency domain multiplexing, active and passive noise shielding, and switchable operational states for power conservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If SERF and SQUID magnetic sensing approaches are used, then sensitivity is improved, but device size and complexity increase significantly
Solution Approach 1:
The patent replaces complex mechanical and cryogenic systems (SQUID) or vacuum tube systems (SERF) with an acoustically driven FMR sensor that uses surface acoustic waves and standard semiconductor fabrication, eliminating the need for complex shielding and temperature control infrastructure
Solution Approach 2:
The patent changes the operating parameters by using acoustically driven FMR at room temperature with nanoscale ferromagnetic films, transitioning from the extreme conditions required by SERF and SQUID sensors to standard laboratory and commercial environments
2Measurement precision
If SERF and SQUID sensors are implemented, then sensitivity is improved, but integration difficulty increases
Solution Approach 1:
The patent replaces difficult-to-integrate mechanical and cryogenic systems with acoustically driven FMR sensors that can be fabricated using standard semiconductor processes, enabling straightforward integration into existing electronic systems
Solution Approach 2:
The patent creates a universal sensor platform that can be integrated with various electronic systems and readout circuits using standard fabrication techniques, making the sensor adaptable to multiple applications without requiring specialized infrastructure
3Measurement precision
If traditional FMR sensors are used, then measurement capability is achieved, but portability and flexibility are limited
Solution Approach 1:
The patent segments the sensor into a compact, self-contained device with integrated acoustic wave generation and detection, ferromagnetic film, and readout circuitry, enabling portability while maintaining measurement capability
Solution Approach 2:
The patent changes the physical scale and operating conditions of FMR sensors, transitioning from large laboratory equipment to compact, room-temperature devices that can be easily transported and deployed in various environments
4Ease of operation
If FMR sensors are made smaller and more integrated, then portability is improved, but sensitivity may be reduced
Solution Approach 1:
The patent concentrates the magnetic moment into a localized nanoscale ferromagnetic film region, enhancing the magnetic signal density and maintaining high sensitivity despite the overall compact device size
Solution Approach 2:
The patent uses acoustically driven vibrations of the ferromagnetic film to enhance the magnetic resonance signal, allowing compact sensors to achieve high sensitivity through resonant amplification of the magnetic moment precession
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 system achieves highly sensitive, accurate, and precise measurement of electromagnetic fields over various frequency spectrums, with reduced noise and lower power consumption, enabling its use in diverse applications such as brain activity monitoring and augmented reality.
Implementation Method 1
The ADFMR sensor may include: a piezoelectric substrate
Implementation Method 2
Ferromagnetic resonance (FMR) may be used to measure magnetic properties of materials by detecting the precessional motion of the magnetization in a ferromagnetic sample
Implementation Method 3
acoustically driven ferromagnetic resonance (ADFMR) sensors... measurement of electromagnetic field properties
Data Source
AI summary
Systems and method for a multi-array magnetic sensing component, which can include a circuit base platform; a set of magnetic sensors arranged on the circuit base platform; and a circuit system comprising intermediary circuit components, signal input, and a signal output, the signal input being an electrical oscillator signal input and being directable to each magnetic sensor in the set of magnetic sensors, the signal output including magnetic field measurements from the set of magnetic sensors, wherein each magnetic field measurement is individually selectable, the circuit system being configured to turn on or off subsets of the set of magnetic sensors, and the intermediary circuit components including a mixer.