Wearable ECG Mode Switching via PPG Contact Difference
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Solution Overview
Problem
Conventional smart watches require manual and slow switching between ECG measurement modes, such as wristband and chest-lead modes, which is inconvenient.
Innovation Solution
A method and apparatus that use PPG data from an optical heart-rate sensor to automatically switch between ECG measurement modes by calculating the difference in PPG data generated by a measurement electrode's contact with the skin, allowing for efficient and intelligent mode switching between ECG wristband and chest-lead modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual switching between ECG measurement modes is implemented via physical button or application selection, then the device structure remains simple, but the switching speed is slow and user convenience deteriorates
Solution Approach 1:
The system automatically detects the user's body position using PPG data from the optical heart-rate sensor and switches between ECG measurement modes without manual intervention. The device serves itself by using its own sensor data to determine the optimal measurement mode, eliminating the need for user interaction while maintaining simple device structure.
Solution Approach 2:
The system continuously monitors PPG data and uses the difference between successive readings to detect body position changes. This feedback mechanism triggers automatic mode switching when position changes are detected, enabling fast and convenient operation without adding complex external control mechanisms.
2Productivity
If automatic switching based on PPG data is implemented, then switching speed and user convenience improve, but the device complexity increases due to additional processing requirements
Solution Approach 1:
The optical heart-rate sensor serves multiple functions: it collects PPG data for heart rate monitoring and simultaneously provides data for body position detection and mode switching control. By reusing existing sensor data for multiple purposes, the system achieves fast automatic switching without adding dedicated hardware components, thus avoiding increased device complexity.
Solution Approach 2:
The system replaces manual mechanical switching (physical buttons or application selection) with an automated electronic control system that processes PPG data. This substitution eliminates the need for user interaction and physical switching mechanisms, achieving high switching speed while using software-based control rather than additional hardware.
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
Enables fast and efficient automatic switching between ECG measurement modes, eliminating the need for manual intervention and improving user experience by utilizing PPG data to determine the contact state and adjust the measurement mode accordingly.
Implementation Method 1
receiving two successive pieces of PPG data transmitted by an optical heart-rate sensor, where the PPG data is generated by a contact between a measurement electrode and a skin
Data Source
AI summary
A method and an apparatus for switching an ECG measurement mode, a wearable device, and a computer-readable storage medium. The method includes: receiving two successive pieces of PPG data transmitted by an optical heart-rate sensor, where the PPG data is generated by a contact between a measurement electrode and a skin; calculating a difference between the two received pieces of the PPG data; and controlling switching among measurement modes based on the difference, where the measurement modes comprise an ECG wristband mode and an ECG chest-lead mode Manual switching of an ECG measurement mode is avoided with simple operations, high efficiency, and more intelligence.