Optical Sensor Light Initialization for Accurate SpO2 Detection
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Solution Overview
Problem
Existing detection devices struggle to accurately initialize light quantities for measuring blood oxygen saturation levels (SpO2), leading to inaccurate data acquisition.
Innovation Solution
A detection device equipped with first and second light sources emitting different wavelengths, optical sensors, a light quantity controller, and a biometric information detector to set and maintain light quantities for precise measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If light quantity is not properly initialized, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent applies preliminary action by performing light quantity initialization before actual blood oxygen saturation measurement. The light quantity controller adjusts the light source output to predetermined levels in advance, ensuring accurate measurements are obtained from the start. This preliminary initialization prevents measurement errors without requiring complex real-time adjustments during measurement.
Solution Approach 2:
The patent implements feedback through the light quantity controller that monitors measurement values from optical sensors and adjusts light source output accordingly. The controller receives feedback about measurement quality and automatically adjusts light quantity to reach target values, ensuring high measurement precision while maintaining manageable system complexity through automated control.
2Measurement precision
If multiple light sources with different wavelengths are used, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent applies multi-functionality by designing a detection device where multiple light sources with different wavelengths serve various measurement purposes. The first light source (e.g., red light) and second light source (e.g., infrared light) can be used for different types of biometric measurements including blood oxygen saturation, pulse rate, and other physiological parameters, maximizing the utility of each light source.
Solution Approach 2:
The patent implements dynamics by enabling the light quantity controller to dynamically adjust the output of each light source independently. The system can vary the intensity and wavelength combinations based on measurement requirements, allowing flexible adaptation to different measurement scenarios while maintaining high precision through controlled optical parameters.
3Measurement precision
If light quantity is precisely controlled, then measurement precision is improved, but use of energy increases
Solution Approach 1:
The patent applies partial action by using light sources at optimized intensity levels rather than maximum power continuously. The light quantity controller sets appropriate light levels that are sufficient for accurate measurement but not excessive, reducing energy consumption while maintaining measurement precision. The system uses only the necessary light intensity required for each specific measurement task.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting light source intensity and wavelength parameters based on measurement requirements. The light quantity controller modifies these parameters to achieve optimal measurement precision while minimizing energy consumption, adapting the optical parameters to match the specific detection task rather than using fixed high-power settings.
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
Enables highly accurate detection of biometric information, including blood oxygen saturation, by ensuring optimal light quantity initialization and measurement.
Implementation Method 1
a plurality of optical sensors provided at different locations from each other and configured to measure and detect the light emitted by the first light source and the second light source
Data Source
AI summary
According to an aspect, a detection device includes: a first light source configured to emit light having a predetermined wavelength; a second light source configured to emit light having a wavelength different from that of light emitted by the first light source; optical sensors provided at different locations from each other and configured to measure the light emitted by the first light source and the second light source; a light quantity controller configured to set a light quantity of at least one of the first light source or the second light source so that a measurement value based on at least one of detection values of the optical sensors reaches a predetermined target value; and a biometric information detector configured to, when the measurement value has reached the predetermined target value, detect information on a living body with the optical sensors using the set light quantity for detecting biometric information.