Multiple Optical Sensor Control for Position-Variable Biometric Measurement
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Solution Overview
Problem
Wearable electronic devices with multiple optical sensors face challenges in maintaining accurate measurements due to frequent changes in sensor position when worn, leading to inconsistent data acquisition.
Innovation Solution
The electronic device includes a housing with optical sensors and a motion sensor, controlled by a processor to determine signal characteristics and adjust the operation of each sensor based on the wearing state and event type, ensuring accurate measurement values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple optical sensors are employed to improve measurement accuracy, then the reliability of biometric data acquisition is improved, but the device complexity increases and the difficulty of detecting and measuring increases due to frequent position changes
Solution Approach 1:
The patent implements dynamic sensor selection and control by continuously monitoring signal characteristics (such as signal strength, noise level, and quality metrics) from each optical sensor and adapting which sensors are active based on current wearing conditions. This allows the system to optimize measurement reliability while managing complexity through intelligent, real-time adjustment rather than static configuration.
Solution Approach 2:
The system changes operational parameters of the optical sensors based on detected signal characteristics and wearing state. By adjusting parameters such as light emission intensity, sampling frequency, and sensor activation status according to real-time feedback, the system maintains accurate measurements across varying conditions without requiring complex hardware modifications.
2Reliability
If multiple optical sensors are employed to improve measurement accuracy, then the reliability of biometric data acquisition is improved, but the difficulty of detecting and measuring increases due to frequent position changes
Solution Approach 1:
The patent employs feedback mechanisms where signal characteristics from each optical sensor are continuously monitored and used to adjust sensor operation. The system detects signal quality metrics and uses this feedback to determine which sensors provide reliable data, dynamically adjusting measurement strategies to maintain accuracy despite position changes during wear.
3Measurement precision
If optical sensors are controlled based on signal characteristics to improve measurement accuracy, then the measurement precision is improved, but the use of energy increases due to separate driving and control of multiple sensors
Solution Approach 1:
The system applies partial action by selectively activating only the necessary subset of optical sensors based on current wearing conditions and signal characteristics. Instead of continuously operating all sensors, the system activates only those providing sufficient signal quality, thereby reducing energy consumption while maintaining measurement precision through intelligent sensor selection rather than exhaustive sensor operation.
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 approach allows for more precise biometric data acquisition by individually controlling optical sensors based on their signal characteristics and the device's usage state, enhancing measurement accuracy.
Implementation Method 1
Each of the optical sensors includes a respective light emitter and a respective light receiver
Data Source
AI summary
An electronic device and a method for controlling the electronic device are provided. The electronic device includes a motion sensor and optical sensors. Each of the optical sensors includes a light emitter and a light receiver. The optical sensors are separately driven to determine a respective signal characteristic of each of the optical sensors. A current state of an object to be measured is determined, based on at least one signal received through the motion sensor or the optical sensors. A light emitter of at least one of the optical sensors is driven, based on the respective signal characteristics of the optical sensors according to the current state of the object to be measured. Based on the respective signal characteristics of the optical sensors, a light signal sensed through a light receiver of at least one of the optical sensors is selected and received.