Physiological Signal Electrode Array with Automatic Contact Selection
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Solution Overview
Problem
Existing physiological signal measurement systems face errors and disruptions due to electrodes becoming loosened or detached from the body surface during subject movement, leading to inaccurate or incomplete signal measurement.
Innovation Solution
A system and method that utilize multiple first and second electrodes, where a measurement apparatus continuously tests and selects suitable electrodes to form a closed loop for signal measurement, allowing for substitution of electrodes if contact is lost, ensuring continuous and accurate physiological signal acquisition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple electrodes are attached on the subject's body to ensure continuous measurement, then measurement reliability is improved, but device complexity increases
Solution Approach 1:
The electrode array is segmented into multiple first electrodes and second electrodes that can be independently tested and selected. This segmentation allows the system to divide the measurement function across multiple components, ensuring that if one electrode fails or loses contact, others can compensate, thereby improving reliability while managing complexity through modular design
Solution Approach 2:
The measurement apparatus performs preliminary testing on all electrodes before actual measurement to determine their operational status. This preliminary action identifies functional electrodes in advance, allowing the system to pre-select valid electrode pairs for measurement, thus ensuring reliability without requiring complex real-time detection mechanisms during measurement
2Measurement precision
If electrodes are tested continuously to ensure good contact, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The system implements periodic testing of electrodes at predetermined intervals rather than continuous testing. This periodic action maintains measurement precision by regularly checking electrode contact status while minimizing time loss by allowing measurement to proceed between testing cycles, thus balancing precision requirements with time efficiency
3Reliability
If substitutional electrodes are selected automatically when contact is lost, then reliability is improved, but device complexity increases
Solution Approach 1:
The measurement apparatus automatically performs electrode testing, status determination, and substitutional electrode selection without external intervention. This self-service capability improves measurement continuity and reliability by ensuring immediate detection and correction of contact issues, while the automation actually reduces operational complexity despite increasing internal system intelligence
Data Source
AI summary
The present invention provides a system and a method for measuring physiological signal. The system includes a plurality of electrodes and a measurement apparatus. A plurality of first electrodes of the electrodes are attached on a first area of a subject. A plurality of second electrodes of the electrodes are attached on a second area of the subject. The measurement apparatus is coupled to the electrodes and performs testing on the first electrodes and the second electrodes to obtain a plurality of testing results. The measurement apparatus selects one of the first electrodes as a first measuring electrode and selects one of the second electrodes as a second measuring electrode according to the testing results. The measurement apparatus measures a physiological signal of the subject through the first measuring electrode and the second measuring electrode.