Wearable Device Wear Detection via Posture-Adjusted Light Standards
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wearable electronic devices face challenges in accurately determining whether they are being worn on the body, as existing methods rely solely on light measurement, which can be influenced by various factors such as posture and sunburn, leading to potential misclassification.
Innovation Solution
Incorporating a light emitter and receiver to measure incident light, combined with an acceleration sensor to determine the device's posture, and processors to set a standard value for wear detection based on the measured light and posture, ensuring accurate wear detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only light measurement is used to determine wear status, then the device complexity is reduced, but the measurement precision deteriorates due to influence from posture and sunburn factors
Solution Approach 1:
The patent combines multiple detection methods (light measurement and acceleration sensor measurement) into a unified wear status determination system. The light receiver measures incident light amount while the acceleration sensor measures posture, and both are integrated by the processor to comprehensively determine wear status, thereby improving measurement precision without excessive increase in device complexity
Solution Approach 2:
The processor acts as an intermediary that receives data from both the light receiver and acceleration sensor, processes this information, and determines wear status based on combined analysis. This intermediary processing allows the system to account for posture and sunburn factors by comparing light measurement data with posture measurement data
2Ease of operation
If light measurement is performed without considering posture, then the ease of operation is improved, but the reliability of wear detection deteriorates
Solution Approach 1:
The system automatically performs posture measurement and compensation without requiring user intervention. The acceleration sensor continuously monitors posture and the processor automatically adjusts the determination standard value based on measured posture, making the operation convenient while maintaining high reliability
Solution Approach 2:
The system dynamically changes the determination standard value based on posture parameters. When posture changes (affecting light reflection), the standard value is adjusted accordingly, allowing reliable wear detection across different operational conditions without complicating user interaction
3Device complexity
If a fixed determination standard value is used, then the device complexity is reduced, but the adaptability to individual variations in posture and sunburn deteriorates
Solution Approach 1:
The determination standard value is made dynamic rather than fixed. The processor adjusts the standard value based on real-time posture measurements from the acceleration sensor, enabling the system to adapt to individual variations in user posture and sunburn conditions while maintaining relatively simple control logic
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 enhances the accuracy of wear detection by considering individual variations in posture and sunburn, reducing the likelihood of incorrect classification and providing a reliable method for determining if the device is worn.
Implementation Method 1
a light emitter that emits light with a certain wavelength toward a body while the device is worn on the body; a light receiver that measures an incident light amount of the light with the certain wavelength
Data Source
AI summary
A wearable electronic device includes, a light emitter that emits light with a certain wavelength toward a body while the device is worn on the body; a light receiver that measures an incident light amount of the light with the certain wavelength; a posture measurer that measures a posture of a part of the body where the device is worn; and one or more processors. The processor is configured to, determine a posture of the part of the body where the device is worn based on a measured result measured by the posture measurer, and set a first standard value for determining whether the device is worn on the body or not based on the incident light amount in a case that the part of the body where the device is worn is in a standard posture.