Electronic Device Biometric Detection with Reference Posture Guidance
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Solution Overview
Problem
The measurement accuracy of biometric information in electronic devices is affected by the user's posture, including arm position and spacing from the torso, which can vary and impact the reliability of measurements.
Innovation Solution
An electronic device equipped with sensors to determine its location and posture, and guide the user into a predetermined reference posture for accurate biometric information measurement, using a combination of biometric and inertial signals to adjust the measurement posture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If biometric information is measured without controlling user posture, then measurement process is simple and fast, but measurement accuracy decreases due to variations in arm position and spacing
Solution Approach 1:
The system performs preliminary actions by detecting user posture before biometric measurement and providing guidance to adjust to reference posture. The processor detects current posture using sensor data, compares it with reference posture, and provides feedback guidance before the actual measurement occurs, ensuring optimal conditions are established in advance.
Solution Approach 2:
The system implements feedback by continuously monitoring user posture through sensors and providing real-time guidance information to the user. The processor compares detected posture with reference posture and provides feedback through output devices (display, audio, or haptic) to guide the user toward the correct posture, thereby improving measurement accuracy through iterative adjustment.
2Reliability
If user posture is monitored and guided to reference posture, then biometric measurement reliability improves, but measurement time increases due to posture adjustment process
Solution Approach 1:
The system applies partial action by providing posture guidance only when the detected posture deviates from the reference posture beyond a threshold. If the user is already in acceptable posture range, no guidance is provided and measurement proceeds immediately, thus avoiding unnecessary time loss while maintaining reliability when needed.
Solution Approach 2:
The system performs preliminary posture detection and assessment before initiating measurement. By quickly evaluating whether current posture is acceptable, the system can proceed directly to measurement when posture is adequate, avoiding time-consuming guidance processes for already-correct postures.
3Measurement precision
If multiple sensors are used to detect posture and location, then measurement accuracy improves, but device complexity and cost increase
Solution Approach 1:
The system achieves multi-functionality by using existing electronic device sensors (accelerometer, gyro, magnetometer) for multiple purposes: device orientation detection, user posture detection, and location determination. These sensors originally designed for basic device functions are repurposed to detect biometric measurement posture, eliminating the need for dedicated posture sensors and reducing overall system complexity.
Solution Approach 2:
The system utilizes the electronic device's own existing sensors and processing capabilities to perform posture detection and guidance functions. The processor leverages data from built-in sensors without requiring external dedicated posture detection equipment, making the system self-sufficient and reducing complexity.
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
Ensures highly reliable biometric information measurement by aligning the user's posture with a reference posture, enhancing the accuracy and consistency of biometric data collection.
Implementation Method 1
The electronic device may measure biometric information based on a bioelectrical impedance analysis (BIA) signal, a photoplethysmogram (PPG) signal or an electrocardiogram (ECG) signal
Implementation Method 2
The electronic device may measure biometric information based on a bioelectrical impedance analysis (BIA) signal
Implementation Method 3
a second sensor configured to sense an inertial signal
Data Source
AI summary
An electronic device may include: an output module comprising output circuitry, a communication module comprising communication circuitry configured to communicate with at least one external device, a first sensor configured to sense a biometric signal, a second sensor configured to sense an inertial signal, and a processor operatively connected to the output module, the communication module, the first sensor, and the second sensor. The processor may be configured to determine a location of the electronic device for a body based on a signal transmitted or received with the at least one external device through the communication module in response to sensing the biometric signal, to determine a posture of the electronic device based on information obtained through the second sensor, to determine a measurement posture based on the location and the posture of the electronic device, and to provide a guide to correspond the measurement posture to a predetermined reference posture.