Optical Sensor Distance Error Correction via Light Intensity Analysis
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Solution Overview
Problem
Optical sensors face accuracy issues due to deviations in the distance between the light source and detector, leading to variations in biometric information estimation across different devices.
Innovation Solution
A method and apparatus that adjust the brightness of the light source and use preset material data to correct errors in the distance between the light source and detector by analyzing differences in light reception or image gradation, allowing for precise recalibration of the detection area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the distance between light source and detector is not precisely controlled during manufacturing, then device complexity and manufacturing cost are reduced, but measurement precision deteriorates due to absorbance changes
Solution Approach 1:
The patent applies preliminary action by measuring the actual distance between light source and detector during manufacturing and storing this information for later correction. This allows the system to pre-compensate for distance variations, maintaining measurement precision without requiring extremely tight manufacturing tolerances.
Solution Approach 2:
The patent changes the parameter of distance measurement from a fixed manufacturing specification to a variable parameter that is measured and corrected during operation. By using the measured distance value to correct absorbance calculations, the system adapts to actual distance variations, resolving the contradiction between manufacturing precision requirements and measurement precision.
2Measurement precision
If physical measurement methods are used to correct distance error, then measurement precision improves, but device complexity and calibration time increase
Solution Approach 1:
The patent replaces complex mechanical measurement and calibration systems with a simplified optical measurement approach. Instead of using physical tools to measure and adjust distances, the system uses the optical sensor itself to measure distance based on light intensity, automatically calculating and applying corrections without mechanical intervention.
Solution Approach 2:
The system performs self-calibration by using its own light source and detector to measure the distance between them. The optical sensor automatically measures the distance based on light intensity variations and applies corrections to its own measurements, eliminating the need for external calibration equipment or complex manual procedures.
3Measurement precision
If distance measurement and correction is performed for each device, then measurement precision improves across devices, but productivity decreases due to additional calibration steps
Solution Approach 1:
The patent replaces time-consuming mechanical measurement procedures with rapid optical measurements. The distance correction is performed using light intensity measurements and automated calculations, which are much faster than physical measurement methods, thereby maintaining productivity while achieving consistent measurement precision across devices.
Solution Approach 2:
Each device performs automatic self-calibration without requiring external intervention or complex calibration procedures. The system quickly measures its own distance parameters and applies corrections autonomously, minimizing calibration time and maintaining high productivity while ensuring measurement consistency across all devices.
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 improves the accuracy of biometric information estimation by ensuring consistent measurements across devices, enhancing the reliability of antioxidant indicator assessments.
Implementation Method 1
controlling the light source to emit light to a preset material; acquiring preset material data corresponding to the emitted light and the preset material using the detector; correcting, by using the acquired preset material data, an error of a distance between the light source and the detector based on a difference between a first amount of light received at a first point of the detector and a second amount of light received at a second point of the detector
Data Source
AI summary
A method of correcting an error of an optical sensor which includes a light source and a detector, including adjusting a brightness of the light source to a preset brightness; controlling the light source to emit light to a preset material; acquiring preset material data corresponding to the emitted light and the preset material using the detector; and correcting, by using the acquired preset material data, an error of a distance between the light source and the detector based on a difference between a first amount of light received at a first point of the detector and a second amount of light received at a second point of the detector, or based on a gradation of an image obtained by the detector