Physiological Signal Detection Module with Heating Member
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional physiological signal detection methods face challenges with disposable electrodes causing skin irritation and impedance issues, leading to distorted signals, especially in long-term measurements, and active electrodes complicate the system with separate power supply requirements for each channel.
Innovation Solution
A physiological signal detection module with a detachable electrode housing and a printed circuit board for impedance matching, combined with a heating member to maintain the electrode at a stable temperature, and a multi-channel connector module with an integrated power supply unit for powering the detection system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a disposable electrode with conductive gel is used, then impedance between the electrode and skin is reduced, but skin irritation and stinging pain occur during long-time measurement
Solution Approach 1:
The patent uses a disposable dry electrode that replaces the conductive gel with a conductive polymer coating. This eliminates the need for reusable electrodes with complex cleaning protocols, reducing skin irritation while maintaining acceptable signal quality for portable applications
Solution Approach 2:
The patent changes the material parameter of the electrode from metallic with conductive gel to conductive polymer coating, fundamentally altering how the electrode interfaces with skin to eliminate irritation while maintaining electrical conductivity
2Object-affected harmful factors
If a dry electrode is used instead of conductive gel, then skin irritation is reduced, but impedance difference between electrode and skin causes signal distortion
Solution Approach 1:
The patent introduces an impedance matching circuit as an intermediary component between the dry electrode and the signal detection system. This circuit compensates for the impedance mismatch between the dry electrode and skin, correcting signal distortion without requiring conductive gel
Solution Approach 2:
The patent changes the electrical parameters of the electrode interface by using a conductive polymer coating with specific resistance characteristics that better match skin impedance, reducing signal distortion while maintaining the benefits of dry electrodes
3Reliability
If an active electrode with buffer is used to match impedance, then signal stability is improved, but the connector design becomes complex requiring separate power supply for each channel
Solution Approach 1:
The patent merges the impedance matching function into the electrode assembly itself through an integrated circuit, eliminating the need for separate active electrodes and complex connector designs. The circuit is built directly into the electrode housing, combining multiple functions in a single component
Solution Approach 2:
The patent creates a universal electrode assembly that can be used across multiple channels with the same design, eliminating the need for channel-specific active electrodes. The integrated circuit provides impedance matching for all channels through a single standardized interface
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
This solution enables stable and undistorted physiological signal detection by maintaining electrode temperature and simplifying the system with integrated power, reducing skin irritation and system complexity.
Implementation Method 1
a heating member interposed between the electrode and the electrode housing to increase the temperature of the electrode to a certain degree
Data Source
AI summary
Provided is a physiological signal detection module which has a heating member and a multi-channel connector. The heating member maintains an electrode's contact with a user skin at a constant temperature, and the multi-channel connector module for electrical connection transmits the physiological signal to an external physiological signal detection apparatus. It is possible to prevent the skin from being directly contacted with the electrode in the cold state and have a less impact given by a change of the impedance due to a skin temperature based on the change of the season and external temperature, so that the stable physiological signal can be detected without distortion.