Wearable Biometric Terminal Sensor Fusion
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Solution Overview
Problem
Existing mobile terminals require separate user operation to detect desired biometric signals, which can be inconvenient and may not provide continuous or accurate data without manual intervention.
Innovation Solution
A watch-type terminal with integrated first and second sensor modules on the band, including PPG sensors and electrodes, that can detect biometric signals without additional user control, using algorithms to form various types of biometric data and output guide information based on collected data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a mobile terminal includes multiple sensors for detecting biometric signals, then the accuracy and comprehensiveness of biometric data is improved, but the device complexity and user operation burden increase
Solution Approach 1:
The patent combines multiple sensor modules (first sensor module with PPG sensor, second sensor module with electrodes) into a single wearable terminal device. The control module integrates data from both sensors to detect multiple biometric signals (heart rate, blood oxygen, electrodermal activity) simultaneously, resolving the contradiction by merging sensors rather than requiring separate devices or complex manual operation.
Solution Approach 2:
The wearable terminal is designed with multi-functional sensor modules that can detect various biometric signals using different sensing principles (optical PPG sensing and electrical electrode sensing). This universal design allows a single device to perform multiple detection functions, improving measurement precision without proportionally increasing device complexity.
2Measurement precision
If the terminal continuously collects biometric data using multiple sensors, then data accuracy and completeness are improved, but energy consumption increases
Solution Approach 1:
The control module is configured to control the first and second sensor modules to operate alternately or periodically rather than continuously simultaneously. The controller can switch between PPG-based detection and electrode-based detection based on the type of biometric signal needed, reducing energy consumption while maintaining data accuracy through periodic sampling and data fusion.
Solution Approach 2:
The terminal automatically determines which sensor module to activate based on the required biometric signal type, eliminating the need for manual user selection. The system self-manages sensor activation and data collection strategies, optimizing energy usage while ensuring accurate biometric measurement through appropriate sensor selection.
3Measurement precision
If the terminal requires separate user operation for each sensor, then measurement precision is maintained, but ease of operation deteriorates
Solution Approach 1:
The control module automatically manages the operation of multiple sensor modules without requiring separate user commands for each sensor. The system autonomously selects and activates the appropriate sensor (PPG or electrode) based on the desired biometric measurement, performing self-service operations that maintain measurement precision while dramatically improving ease of operation.
Solution Approach 2:
Multiple sensor operations are merged into a single integrated detection process. Instead of requiring users to manually operate separate sensors for different biometric signals, the combined sensor system is controlled through a unified interface, allowing users to obtain comprehensive biometric data through minimal interaction while maintaining the precision of individual sensor measurements.
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 continuous, accurate detection of biometric signals without user intervention, providing comprehensive biometric data and guide information, enhancing user convenience and data accuracy.
Implementation Method 1
a first sensor module 310 disposed on a surface of a band 202 in contact with a user's body when the watch type terminal 200 is worn... including a PPG sensor
Implementation Method 2
EP 2 989 965 A2 discloses a wearable terminal... A controller is configured to extract an electrocardiogram by measuring a difference of electric potentials of body muscles sensed from the first touch pad and the second touch pad
Data Source
Figure 1A
Figure 1B~1C
Figure 1D
AI summary
A watch type terminal including a main body mountable on part of a user; at least one biometric sensor installed in the main body; and a controller configured to control the biometric sensor to detect a biometric signal of the user, determine target biometric data for the user to be collected based on the detected biometric signal, control the biometric sensor to detect additional biometric signals of the user to collect the target biometric data, and output the target biometric data to the user.