EEG Electrode Impedance Feedback for Automatic Head Contact
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Solution Overview
Problem
Existing EEG signal acquisition apparatuses have a low intelligence degree, requiring manual adjustment of signal acquisition electrodes for full contact with the user's head, leading to potential poor signal quality.
Innovation Solution
A method and apparatus that includes a movably connected signal acquisition electrode and a pushing component, which automatically adjusts the electrode's position based on impedance thresholds, ensuring full contact and eliminating the need for manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If manual adjustment of signal acquisition electrodes is used, then full contact with user's head can be achieved, but the intelligence degree of the apparatus remains low
Solution Approach 1:
The electrode automatically adjusts its own position through the pushing component based on impedance feedback, eliminating the need for manual adjustment by operators. The system serves itself by detecting contact quality and autonomously optimizing electrode placement.
Solution Approach 2:
The system continuously monitors contact impedance between the electrode and user's head, using this feedback signal to control the pushing component. When impedance exceeds the threshold, the system automatically adjusts the electrode position and recalibrates, creating a closed-loop control system that improves intelligence degree.
2Extent of automation
If pushing component is added to automatically adjust electrode, then intelligence degree increases, but device complexity increases
Solution Approach 1:
The apparatus is divided into functionally independent modules: the pushing component for mechanical adjustment, the impedance detection unit for monitoring, and the control unit for decision-making. This segmentation allows each component to perform its specific function efficiently while maintaining overall system manageability despite increased complexity.
3Reliability
If electrode is automatically pushed to ensure full contact, then signal quality improves, but contact pressure may become excessive
Solution Approach 1:
The pushing component dynamically adjusts the electrode position based on real-time impedance measurements. Rather than applying fixed continuous pressure, the system pushes only when impedance exceeds the threshold, then stops when optimal contact is achieved, creating a dynamic adjustment process that ensures signal quality while avoiding excessive pressure.
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 apparatus achieves high intelligence by automatically adjusting electrodes for optimal contact, simplifying operations and ensuring high-quality EEG signal acquisition without manual intervention.
Implementation Method 1
controlling when a contact impedance between the signal acquisition electrode and the head is greater than or equal to a first impedance threshold, the pushing component to push the signal acquisition electrode to move towards the head
Data Source
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AI summary
A method for controlling a signal acquisition electrode, an electroencephalogram, EEG, signal acquisition apparatus, and a medium are provided, which relate to the field of EEG signal acquisition technologies. The signal acquisition electrode is movably connected to a wearable component of the EEG signal acquisition apparatus. The wearable component is adapted to be worn on a head of a user, and the EEG signal acquisition apparatus further includes a pushing component. The method includes: controlling, when a contact impedance between the signal acquisition electrode and the head is greater than or equal to a first impedance threshold, the pushing component to push the signal acquisition electrode to move towards the head to acquire an EEG signal by using the signal acquisition electrode. The signal acquisition electrode is in full contact with the head, eliminating a need for staff to manually adjust the signal acquisition electrode, and therefore the EEG signal acquisition apparatus provided by the present disclosure has a high intelligence degree and can simplify an operation of the staff.