Wearable Brain Sensor Headband with Biasing Attachment
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Solution Overview
Problem
Monitoring brainwaves using sensors is challenging due to difficulties in obtaining accurate, low signal-to-noise measurements, often requiring recalibration due to movement relative to the sensors.
Innovation Solution
A wearable apparatus with a band assembly featuring a deformable attachment that includes a biasing component, such as a rubber spring strip or foam, to ensure consistent contact of brainwave sensors with the user's forehead, along with multiple sensors for accurate data collection and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If brainwave sensors are placed close to the user's forehead for accurate measurement, then measurement precision is improved, but the device becomes less comfortable and requires recalibration due to movement
Solution Approach 1:
The headband incorporates elastic bands and spring mechanisms that allow the sensor assembly to dynamically adjust its position and maintain consistent contact pressure with the user's forehead during movement, resolving the contradiction between fixed sensor placement for accuracy and movement adaptability for comfort
Solution Approach 2:
A flexible intermediate structure with biasing elements is introduced between the rigid sensor component and the user's head, allowing the sensor to maintain stable contact without requiring direct rigid attachment, thus improving both measurement precision and wearability
2Measurement precision
If multiple brainwave sensors are added to reduce noise and improve accuracy, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The sensor system is divided into multiple independent sensor elements distributed along the headband, each capable of independent measurement. This segmentation allows for noise reduction through signal averaging while maintaining a modular structure that manages complexity
Solution Approach 2:
The multiple sensors serve dual functions: they provide redundant measurements for noise reduction and enable differential measurement techniques that eliminate common-mode interference, thus improving precision without proportionally increasing operational complexity
3Measurement precision
If the headband structure is made rigid to maintain sensor position, then measurement precision is improved, but adaptability to different user head shapes decreases
Solution Approach 1:
The headband employs a hybrid structure where rigid sensor mounting sections are combined with flexible adaptive sections. The rigid portions maintain precise sensor positioning locally, while the flexible portions adapt to different head shapes, resolving the contradiction between local precision and global adaptability
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 wearable apparatus achieves proper sensor placement for accurate brainwave measurement while being comfortable, easy to manufacture, and cost-effective, ensuring reliable data collection and reduced noise.
Implementation Method 1
a deformable attachment that includes a biasing component, such as a rubber spring strip or foam, to ensure consistent contact of brainwave sensors with the user's forehead
Data Source
AI summary
A wearable apparatus for wearing on a head of a user, the apparatus has a band assembly comprising an outer band member comprising outer band ends joined by a curved outer band portion of a curve generally shaped to correspond to the user's forehead; a flexible inner band member comprising inner band ends joined by a curved inner band portion of a curve generally shaped to correspond to the user's forehead, the inner band member is attached to the outer band member at least by each inner band end respectively attached to a respective one of the outer band ends; at least one brainwave sensor disposed inwardly along the curved inner band portion to provide a flexible conductive surface; and a deformable attachment that connects the flexible inner band member to the outer band, the deformable attachment allowing the inner band to conform to the user's forehead shape, the deformable attachment having a biasing component to urge the at the at least one brainwave sensor towards the user's forehead when worn by the user.