EMG Sensor Electrode Selection via Signal Comparison
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Solution Overview
Problem
It is challenging for individuals lacking anatomical knowledge to accurately attach electromyography (EMG) sensors to the correct location on the skin surface for effective signal measurement, as the quality of biological signals such as EMG, EKG, and EEG is heavily dependent on the sensor's position.
Innovation Solution
A device comprising electrodes and a control unit that selects optimal electrode combinations by comparing signal sizes, using a bracelet to support electrodes and a guide unit to provide movement patterns for muscle contraction and relaxation, ensuring consistent signal measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple electrodes are used to measure biological signals, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system performs preliminary testing of multiple electrode combinations before actual measurement. The control unit automatically tests different electrode pairings and identifies the optimal combination in advance, so that when measurement is needed, the best electrodes are already selected and ready for use.
Solution Approach 2:
The system is self-configuring and self-optimizing. The control unit automatically selects the best electrode combinations without requiring manual intervention or anatomical knowledge from the user. The system serves itself by autonomously determining optimal electrode placements based on actual signal quality measurements.
2Ease of operation
If automatic electrode selection is implemented, then ease of operation is improved, but use of energy increases
Solution Approach 1:
The system performs electrode combination testing only partially or selectively - not all possible combinations are tested exhaustively. Instead, the control unit tests a sufficient number of combinations to identify the optimal pairing, balancing the need for automatic selection with energy conservation considerations.
3Measurement precision
If signal size comparison is used to determine optimal electrodes, then measurement precision is improved, but loss of time occurs
Solution Approach 1:
The optimal electrode combination is determined in advance through preliminary testing and signal comparison. Once the best combination is identified during the setup phase, it is stored and reused for subsequent measurements, avoiding repeated time-consuming comparisons during actual use.
Data Source
AI summary
Provided is a device for measuring a signal and a method of operating the same. The device may include electrodes attached to the device, and a control unit for determining the optimal pair of electrodes to be used for measuring the signal. Also, the device may include an output unit for measuring signals that are sensed by the electrodes.