Adaptive Optical Channel Selection for Wearable Sensor Power Balance
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Solution Overview
Problem
Wearable devices face a trade-off between measurement quality and power consumption due to varying optical channel selections based on sensor arrangement and user physiology, leading to inconsistent performance in physiological data collection.
Innovation Solution
Adaptive sensor selection techniques in wearable devices that select optical channels based on measurement quality metrics and power consumption metrics, adjusting emission power and photodetector parameters to optimize data collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple optical channels are used to improve measurement quality, then measurement quality is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic optical channel selection where the system continuously monitors signal quality metrics and power consumption levels, then adaptively adjusts which optical channels are active. This allows the wearable device to switch between different optical channel configurations based on real-time conditions, optimizing the balance between measurement quality and power consumption rather than using a fixed configuration
Solution Approach 2:
The system changes operational parameters by adjusting emission power levels and photodetector sensitivity settings across different optical channels. By modifying these parameters dynamically, the system can achieve high measurement quality when needed while reducing power consumption during periods of lower measurement requirements, directly addressing the trade-off between these two factors
2Use of energy by moving object
If optical channel selection is adjusted to reduce power consumption, then power consumption is reduced, but measurement quality deteriorates
Solution Approach 1:
The patent incorporates feedback mechanisms where the system continuously monitors measurement quality metrics from the optical channels and uses this information to adjust which channels remain active. When measurement quality drops below acceptable thresholds, the system automatically activates additional optical channels or increases emission power to restore quality, ensuring that power consumption is reduced only when measurement quality requirements are still met
Solution Approach 2:
The system performs preliminary assessment of optical channel signal quality and power consumption characteristics before making selection decisions. By pre-evaluating the performance metrics of available optical channels, the system can proactively select the optimal subset that meets measurement quality requirements while minimizing power consumption, rather than reactively adjusting after quality degradation occurs
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
Enhances measurement quality while reducing power consumption by dynamically selecting and configuring optical channels and components for improved physiological data collection.
Implementation Method 1
a first light-emitting component and a second light-emitting component. The first photodetector may be located between the first light-emitting component and the second light-emitting component
Implementation Method 2
collect physiological data associated with a user based on sensor measurements performed by the wearable device
Data Source
AI summary
Methods, systems, and devices for adaptive sensors are described. A system may acquire physiological data from a user via multiple optical channels of a wearable device, where each optical channel includes a light-emitting component and a photodetector. The system may determine respective measurement quality metrics and respective power consumption metrics associated with each optical channel based on the physiological data. Additionally, the system may select one or more optical channels of the multiple optical channels of the wearable device based on a comparison of the respective measurement quality metrics and the respective power consumption metrics associated with each optical channel. The system may acquire additional physiological data using the one or more optical channels based on the selecting.