Wireless EEG Sensor Electrode Noise Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing EEG devices are complex, costly, and require trained personnel for setup and operation due to high sensitivity to environmental noise and contact resistance issues, making them impractical for widespread use outside clinical settings.
Innovation Solution
A method and system for sensing electrical activity in tissue using a sensor electrode and a reference electrode with an amplifier configuration that reduces noise influence, allowing for effective signal amplification and isolation of the signal of interest, enabling the use of media material to guide users in releasing emotional limitations by measuring changes in brain activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If prior EEG devices are used to measure brain electrical activity, then measurement precision is improved, but device complexity increases and requires trained personnel for operation
Solution Approach 1:
The patent extracts and removes the problematic wires and external amplifier from the measurement system. By using a wireless architecture where the sensor electrode communicates directly with a processor via wireless transmission, the system eliminates the complex wiring infrastructure and external amplification hardware that contributed to device complexity while maintaining measurement precision
Solution Approach 2:
The patent introduces a wireless communication intermediary between the sensor electrode and the processor. Instead of direct wired connections requiring complex shielding and routing, the system uses wireless signals as an intermediary to transmit the brain activity data, significantly simplifying the overall system architecture
2Measurement precision
If differential amplifiers are used to amplify small brain signals, then measurement precision is improved, but sensitivity to environmental noise increases
Solution Approach 1:
The patent removes the differential amplifier from the signal path entirely. By using a wireless sensor electrode that can directly transmit signals to the processor, the system eliminates the amplification stage that was inherently sensitive to environmental noise while still achieving precise measurements through direct digital processing
Solution Approach 2:
The patent replaces the mechanical/electrical amplification system with a wireless transmission system. Instead of using analog amplifiers that are susceptible to noise, the system uses digital wireless communication to transmit the raw signal directly to the processor for digital processing and analysis
3Measurement precision
If skin preparation is performed to reduce contact resistance, then measurement precision is improved, but ease of operation deteriorates due to extensive preparation required
Solution Approach 1:
The patent changes the electrical parameters of the sensor electrode to achieve low contact resistance without extensive skin preparation. By modifying the electrode material properties, surface characteristics, or electrical characteristics of the sensor itself, the system achieves reliable signal transmission with minimal skin preparation requirements
4Reliability
If wires are used to connect electrodes to the EEG machine, then signal transmission is achieved, but environmental noise interference increases
Solution Approach 1:
The patent replaces the wired mechanical connection system with a wireless transmission system. By eliminating physical wires that act as antennas for electromagnetic noise, the system uses wireless communication to transmit signals, thereby reducing susceptibility to environmental electromagnetic interference while maintaining reliable signal transmission
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 allows for accurate measurement of brain electrical activity with reduced noise interference and simplified skin preparation, enabling users to monitor and manage emotional states without the need for extensive training or clinical settings.
Implementation Method 1
Electrical activity is detected from the tissue between a first point and a second point on skin of the user and a voltage signal is generated in response thereto
Implementation Method 2
The voltage signal is amplified to amplify the signal of interest and undesired signals without substantially amplifying the noise
Data Source
AI summary
An exemplary embodiment providing one or more improvements includes apparatus and methods for sensing electrical activity in tissue of a person in a manner which is substantially limits or eliminates interference from noise in a surrounding environment.