Flexible EEG Headset with Spring-Adaptive Electrode Placement
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Solution Overview
Problem
Existing electroencephalography (EEG) headsets struggle to accurately locate electrodes according to the international 10-20 system across varying head sizes and shapes without causing discomfort or requiring complex adjustments.
Innovation Solution
A system featuring a set of electrode bodies connected by spring elements with adjustable spring rates and arcuate sections, allowing for elastic deformation to conform to different head sizes and curvatures, distributing weight via electrode tips with conductive probes and insulative bosses, and incorporating electromagnetic shielding to reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional rigid EEG headsets are used to ensure accurate electrode placement, then measurement precision is improved, but device complexity and user discomfort increase
Solution Approach 1:
The headset employs spring elements with adjustable spring rates that allow the structure to dynamically adapt to different head sizes and shapes. The spring elements can be reconfigured between a first configuration for smaller heads and a second configuration for larger heads, enabling the rigid electrode positioning function to remain effective across varying user anatomies without requiring complex manual adjustments.
Solution Approach 2:
The patent changes the physical parameters of the spring elements by adjusting their spring rates and configurations. By modifying the spring rate parameter, the headset can accommodate different head circumferences while maintaining accurate electrode placement. This parameter adjustment allows the same headset structure to serve multiple user types without requiring complete redesign or complex adjustment mechanisms.
2Adaptability or versatility
If spring elements with adjustable spring rates are used to accommodate different head sizes, then adaptability is improved, but device complexity increases
Solution Approach 1:
The headset divides the adaptation function into multiple spring elements that can be independently configured. Each spring element can be adjusted between different configurations, allowing granular control over the overall headset fit. This segmentation enables complex adaptability to be achieved through simple, modular adjustments rather than requiring a completely complex adjustment mechanism.
Solution Approach 2:
The spring elements serve multiple functions: they provide mechanical coupling between electrode bodies, accommodate different head sizes through configuration changes, and maintain electrode positioning accuracy. This multi-functionality reduces the need for separate adjustment mechanisms, thereby reducing overall device complexity while maintaining high adaptability.
3Measurement precision
If electromagnetic shielding is added to reduce noise, then signal quality is improved, but device complexity and weight increase
Solution Approach 1:
The electromagnetic shielding is merged with the existing spring elements and electrode bodies rather than being added as a separate component. The shielding material is integrated into the structural elements that already exist in the headset, providing noise reduction functionality without requiring additional complex shielding structures or increasing overall device complexity.
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 provides accurate EEG results with minimal discomfort and reduced noise, accommodating diverse head shapes and sizes without complex adjustments, ensuring consistent electrode placement and signal quality.
Implementation Method 1
spring elements with adjustable spring rates and arcuate sections, allowing for elastic deformation to conform to different head sizes and curvatures
Implementation Method 2
incorporating electromagnetic shielding to reduce noise
Data Source
AI summary
One variation of a system for locating electrodes on a head of a user includes a headset defining a set of electrode bodies elastically interconnected by a unique set of spring elements configured to locate the set of electrode bodies at electrode positions of the international 10-20 standard, irrespective of the size of the head of the user. The spring elements are configured to carry electrical signals between interconnected electrode bodies and ultimately to a controller. An electrode tip is mechanically and electrically coupled to each electrode body. The electrode tip comprises a thin conductive probe mounted at the distal end of an elastic beam and is configured to extend from a base of the electrode tip, bypass hair, and electrically couple to the head of the user, and an insulative boss, configured to rest on and transfer the weight of the headset to the head of the user.