Wearable Spectroscope Calibration via Charger Reference
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Solution Overview
Problem
Existing wearable devices face challenges in conveniently calibrating spectrometers for accurate biometric signal measurement, particularly when integrated into wearable devices for daily use.
Innovation Solution
A wearable device system that includes a spectroscope capable of emitting light to a reference material during charging, measuring its intensity, and using this data to calculate the light absorbance of the user's skin by emitting light to the skin and measuring the reflected intensity, with a processor determining absorbance based on the corrected intensity and skin reflectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a spectroscope is installed in a wearable device for biometric signal measurement, then the capability to detect light and measure biometric signals is improved, but the complexity of calibrating the spectroscope increases
Solution Approach 1:
The patent applies preliminary action by performing spectroscope calibration automatically during the charging process. The charger includes a reference material that enables the spectroscope to calibrate itself before actual biometric measurements are taken. This preliminary calibration action eliminates the need for separate manual calibration steps, thereby maintaining measurement precision while reducing operational complexity for users.
2Measurement precision
If manual calibration of the spectroscope is required, then measurement accuracy can be maintained, but the ease of operation deteriorates
Solution Approach 1:
The patent implements self-service by enabling the spectroscope to perform automatic calibration using a reference material integrated into the charger. When the wearable device is placed on the charger, the spectroscope automatically measures the reference material's optical properties and adjusts its measurements accordingly. This self-calibration mechanism maintains measurement precision while completely eliminating manual calibration operations, significantly improving ease of operation.
3Productivity
If the spectroscope is calibrated using a reference material during charging, then the productivity of biometric data collection is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing the charger to serve multiple functions: it charges the wearable device's battery and simultaneously provides a reference material for spectroscope calibration. The reference material is integrated into the charger structure, allowing the charger to function both as a power source and as a calibration standard. This multi-functionality improves biometric data collection productivity without requiring separate calibration equipment, thereby limiting the increase in overall system 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
This method allows for reliable and accurate measurement of biometric signals by calibrating the spectrometer using a reference material during charging and applying this calibration to skin measurements, enhancing the precision of biometric data collection.
Implementation Method 1
measure an intensity of the first light reflected from the reference material
Implementation Method 2
determine absorbance of the skin of the user based on the intensity of the first light and the intensity of the second light
Implementation Method 3
measure an intensity of the second light reflected from the skin of the user
Implementation Method 4
emit a second light to a skin of a user, and measure an intensity of the second light reflected from the skin of the user
Data Source
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AI summary
A wearable device, a charger, and a method for estimating absorbance of the wearable device are provided. The wearable device includes a spectroscope configured to emit a first light to a reference material of a charger, measure an intensity of the first light reflected from the reference material, emit a second light to a skin of a user, and measure an intensity of the second light reflected from the skin of the user; and a processor configured to determine absorbance of the skin of the user based on the intensity of the first light and the intensity of the second light.