EEG Device Segmented Body Adapts Head Shape
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Solution Overview
Problem
Conventional EEG measuring devices face challenges in achieving close contact with the scalp due to differences in individual head shapes and sizes, leading to discomfort and unreliable signal recordings.
Innovation Solution
The EEG measuring device features a body with adjustable segments that can be moved relative to each other, allowing for size adjustments to fit various head shapes and sizes. An adjuster mechanism provides a restoring force to maintain close contact with the scalp, ensuring reliable signal recording.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-size EEG device is used, then the device structure is simple, but it cannot adapt to different head shapes and sizes leading to poor contact
Solution Approach 1:
The EEG device body is divided into multiple segments that can move relative to each other, allowing the device to adapt to different head shapes and sizes while maintaining a relatively simple overall structure
Solution Approach 2:
The device incorporates movable segments with restoring force mechanisms that allow dynamic adjustment to fit different head geometries, transitioning from a static fixed structure to a dynamic adaptable structure
2Reliability
If brush type electrodes are used to ensure contact, then contact reliability improves, but pain and discomfort to the subject increases
Solution Approach 1:
The device uses elastic members to provide restoring force that ensures continuous contact between the electrode and scalp without requiring rigid brush structures, thereby maintaining contact reliability while eliminating pain and discomfort
Solution Approach 2:
The mechanical brush structure is replaced with an elastic restoring force mechanism that achieves reliable contact through controlled elastic deformation rather than mechanical pressure, reducing harmful effects on the subject
3Reliability
If wet electrodes with conductive gel are used, then electrical impedance is minimized, but subject discomfort and hair washing requirements increase
Solution Approach 1:
The device uses dry electrodes with elastic restoring force that automatically ensure continuous contact with the scalp, eliminating the need for conductive gel and the associated discomfort and hair washing requirements while maintaining reliable electrical signal quality
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 device efficiently measures EEG signals regardless of head shape or size variations, maintaining close contact with the scalp and providing reliable recordings even when the device size is adjusted.
Implementation Method 1
an adjustment elastic member coupled to the connection pinion gear and configured to, based on the connection pinion gear rotating in a first rotational direction, apply a restoring force to the connection pinion gear in a second rotational direction opposite to the first rotational direction
Data Source
AI summary
The present disclosure relates to an EEG measuring device which is in close contact with a head of a subject while having an adjustable size to fit the head of the subject.