Optical Pumping Fusion Detection for Synchronized Brain Sensing
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Solution Overview
Problem
Current non-invasive brain-computer interface (BCI) sensors face challenges in multi-modal fusion detection due to asynchronous measurements, positional misalignment, large device sizes, and inter-sensor cross-modal interference, particularly in systems combining OPM-MEG and PAI sensors.
Innovation Solution
An optical pumping-based multimodal fusion detection apparatus is designed with aligned laser paths and shared detection geometry to achieve spatiotemporally synchronized magnetic and photoacoustic detection at identical positions, utilizing a laser generation module, laser path control module, atomic vapor cell, photodetection module, and ultrasonic detection module for hardware reuse and reduced crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multi-modal sensor fusion is adopted to achieve higher temporal and spatial resolution, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent combines OPM-MEG and PAI sensors into a single integrated detection apparatus, merging magnetic field detection and photoacoustic imaging functions into one unified system. This consolidation reduces the number of separate devices needed while maintaining high temporal and spatial resolution through coordinated operation of both sensor types.
Solution Approach 2:
The detection apparatus is designed to perform multiple functions simultaneously - both OPM-MEG magnetic field detection and PAI photoacoustic imaging - using a shared platform. The system can switch between or combine these modalities depending on the detection requirements, providing versatile functionality without requiring separate specialized devices.
2Reliability
If OPM-MEG and PAI sensors operate as independent devices, then each sensor maintains its functional performance, but positional misalignment occurs
Solution Approach 1:
The patent integrates OPM-MEG and PAI sensors into a single detection apparatus with a unified structure, ensuring that both sensor types are positioned at identical locations. This physical integration eliminates positional misalignment between separate devices while maintaining the functional performance of each sensing modality through dedicated detection paths.
3Adaptability or versatility
If separate OPM-MEG and PAI devices are used, then measurement synchronization is difficult to achieve, but each device can operate independently
Solution Approach 1:
The patent combines OPM-MEG and PAI detection functions into a single synchronized system where both modalities operate simultaneously from the same detection apparatus. The unified control architecture enables precise temporal coordination of both sensing modalities, eliminating synchronization delays between separate devices while maintaining operational flexibility.
4Measurement precision
If multi-modal sensors are integrated, then spatiotemporal-synchronized detection is achieved, but crosstalk between sensors increases
Solution Approach 1:
The patent divides the detection system into distinct functional modules - separate detection paths for OPM-MEG and PAI sensors, with independent signal processing channels. This segmentation isolates the sensing mechanisms physically and electrically, reducing electromagnetic and optical interference between modalities while maintaining synchronized operation through coordinated control.
5Adaptability or versatility
If multiple independent sensors are used, then detection coverage is comprehensive, but device size increases
Solution Approach 1:
The patent consolidates OPM-MEG and PAI sensing functions into a single compact detection apparatus, merging what would traditionally require separate devices into one integrated unit. This consolidation maintains comprehensive detection coverage by preserving both sensing modalities while reducing the overall device footprint through shared structural components and coordinated operation.
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 apparatus enables synchronized multi-modal fusion detection with reduced device size and minimized crosstalk, enhancing temporal and spatial resolution in brain activity monitoring.
Implementation Method 1
optical pumping-based magnetoencephalography (OPM-MEG) device
Implementation Method 2
the pulsed laser emitted from the first laser emission port propagates through the atomic vapor cell and is subsequently detected by the photodetection module
Implementation Method 3
PAI technology employs short-pulse laser excitation of tissues and detects ultrasound signals generated by the photoacoustic effect
Implementation Method 4
the pulsed laser emitted from the first laser emission port propagates through the atomic vapor cell and is subsequently detected by the photodetection module
Implementation Method 5
detects ultrasound signals generated by the photoacoustic effect to create images
Data Source
AI summary
An optical pumping-based multimodal fusion detection apparatus is provided, relating to the field of brain-computer interfaces. The system includes a laser generation module, laser path control module, atomic vapor cell, photodetection module, ultrasonic detection module, and data processing module. The photodetection module, ultrasonic detection module, and data processing module function as a detection module. The detection module collects the laser intensity and polarization variation signals of the first laser after passing through the atomic vapor cell to output local magnetic field variations in the brain caused by neural discharges. It also collects ultrasonic signals corresponding to an interaction of the second pulsed laser with the measured part to output the subject's blood oxygen signal.