Wearable Sensor Calibration Using Standard Motion Correction
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Solution Overview
Problem
Existing sensor data correction systems fail to accurately account for individual differences, personal variations, and aging properties in wearable sensors, leading to inaccurate data interpretation.
Innovation Solution
A sensor data correction system that includes a standard motion mechanism, a determination unit to calculate relationships between sensor data from standard and actual wearable sensors, and a correction unit to adjust data based on these relationships, thereby correcting for individual and personal differences and aging variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensor data correction is performed using coordinate difference from motion sensor, then measurement precision is improved, but reliability deteriorates due to large individual differences and aging properties in wearable sensors
Solution Approach 1:
The system performs preliminary calibration by having the wearer perform standard motions before actual measurement. This preliminary action establishes a baseline relationship between the wearable sensor and a reference sensor, allowing subsequent corrections for individual differences and aging properties during actual use.
Solution Approach 2:
The system continuously compares sensor data from the wearable sensor with reference data from the standard motion mechanism. This feedback loop enables real-time detection of deviations caused by individual differences or aging, and applies corrections based on the calculated relationship, thereby maintaining reliability over time.
2Manufacturing precision
If standard sensor correction methods are used, then manufacturing precision is improved, but adaptability deteriorates due to inability to account for personal differences
Solution Approach 1:
The system applies local quality by creating individualized correction relationships for each wearer rather than using a universal correction method. The determination unit calculates a personalized relationship between the wearable sensor and reference sensor based on the specific wearer's characteristics, enabling accurate adaptation to personal differences while maintaining manufacturing precision.
Solution Approach 2:
The correction relationship is made dynamic by allowing it to be updated over time. The system can recalibrate the relationship as the wearer's usage patterns change or as the sensor ages, transforming a static manufacturing correction into a dynamic adaptation process that maintains both precision and personalization.
3Duration of action of moving object
If wearable sensors are used for long-term monitoring, then duration of action is improved, but measurement precision deteriorates due to aging properties
Solution Approach 1:
The system implements periodic recalibration where the wearer performs standard motions at intervals during long-term monitoring. This periodic action refreshes the correction relationship, compensating for aging effects that accumulate over time and thereby maintaining measurement precision throughout the extended monitoring period.
Solution Approach 2:
The wearable sensor system performs self-correction by using its own sensor data compared against the standard motion mechanism. The determination unit automatically calculates and applies correction factors without requiring external intervention, enabling the system to maintain precision autonomously over long durations despite aging.
Data Source
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AI summary
A sensor data correction system, includes: a standard motion mechanism unit 101, 103 for performing a standard motion of a wearable sensor 102, 104; a determination unit calculating a relationship between first sensor data that is sensed by a first wearable sensor 102 provided with the standard motion mechanism unit and second sensor data that is sensed by a second wearable sensor 104 provided with the standard motion mechanism unit; and a correction unit 107 correcting the first sensor data or the second sensor data, on the basis of the relationship that is calculated by the determination unit.