EEG Headset with Adjustable Bands for 10-20 Electrode Placement
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Solution Overview
Problem
Existing electroencephalography (EEG) headsets face challenges in accurately and repeatably locating electrodes on users' heads, particularly in adhering to the 10-20 electrode placement standard, due to variations in head shape and size, which affects the quality and labeling of collected EEG data.
Innovation Solution
The EEG headset features adjustable bands and electrodes that can be expanded and retracted to fit various head sizes, with mechanisms for macro and micro adjustments to align electrodes according to the 10-20 system, ensuring precise electrode placement and automatic tagging of signals with correct channel labels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fixed electrode placement is used in EEG headsets, then the device structure is simple, but the electrode placement precision deteriorates due to variations in head shape and size
Solution Approach 1:
The patent implements adjustable bands with macro and micro adjustment mechanisms that allow the electrode positions to be dynamically modified according to individual head shapes and sizes. The bands can be adjusted macro-level to accommodate different head circumferences and micro-level to fine-tune electrode positions, transforming the fixed structure into a dynamic, adaptable system that maintains placement precision across diverse users.
Solution Approach 2:
The electrode placement system is segmented into multiple adjustable components including separate bands for different head regions, macro adjustment mechanisms for coarse positioning, and micro adjustment mechanisms for fine positioning. This segmentation allows each component to be independently optimized and adjusted, enabling precise electrode placement while maintaining manageable device complexity through modular design.
2Adaptability or versatility
If adjustable bands and electrodes are implemented to fit various head sizes, then the adaptability improves, but the device complexity increases
Solution Approach 1:
The system employs dynamic adjustment capabilities where bands can be modified in length and electrode positions can be reconfigured to match individual head geometries. This dynamic adaptability allows the same headset to accommodate diverse head sizes and shapes while maintaining the 10-20 electrode placement standard, enhancing versatility without requiring multiple specialized headsets.
Solution Approach 2:
The patent incorporates preliminary adjustment features such as pre-configured band lengths and marked electrode positions that can be quickly modified before use. The macro and micro adjustment mechanisms are designed to be easily operated by users or technicians, enabling rapid adaptation to different head sizes without complex setup procedures, thus balancing versatility with ease of operation.
3Measurement precision
If manual electrode positioning is used, then the device complexity is low, but the measurement precision and data quality deteriorate
Solution Approach 1:
The patent incorporates feedback mechanisms that provide visual or tactile indicators to guide electrode positioning. The adjustment mechanisms include reference marks, alignment guides, and positioning indicators that feedback the current electrode locations, enabling precise placement according to the 10-20 system. This feedback reduces positioning errors and ensures consistent, accurate electrode placement across different users and operators.
Solution Approach 2:
The patent replaces purely manual mechanical positioning with enhanced mechanical systems that include guided adjustment mechanisms, locked positions, and reference alignment features. These improved mechanical systems provide more precise and repeatable positioning while maintaining ease of operation, bridging the gap between simple manual adjustment and complex automated positioning systems.
Data Source
AI summary
One variation of a system for collecting biosignal data includes: a left junction; a right junction; a first band spanning the left and right junctions; a first band adjuster configured to adjust a length of the first band between the left and right junctions; a second band spanning the left and right junctions and radially offset from the first band about a lateral axis spanning the left and right junctions; a second band adjuster configured to adjust a length of the second band between the left and right junctions; a first electrode fixedly mounted to the first band and centered between the left and right junctions; a second electrode mounted to the first band offset from the first electrode and laterally-adjustable along the length of the first band; and a third electrode mounted to the second band and laterally-adjustable along the length of the second band.