Spectroscopy Displacement Compensation for Moving Skin Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Micro-miniaturized spectrometers used in spectroscopy face challenges in maintaining measurement accuracy when mounted on moving body parts, as the relative position of detection areas changes over time, making it difficult to obtain consistent spectra from specific skin areas.
Innovation Solution
A spectroscopy system that includes multiple detectors and displacement sensors to measure and compensate for the relative position changes of detection areas with respect to a target area, using linear combinations of detection spectrums to calculate a stable target spectrum, allowing for continuous analysis of analytes on moving objects like human skin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a microminiaturized spectrometer is mounted on a moving body part such as a wrist or an elbow, then the measurement range and number of measurements are dramatically increased, but the relative position of the spectrometer changes over time, causing measurement inconsistency
Solution Approach 1:
The patent applies dynamics by making the detection area movable rather than fixed. The detection area is configured to move relative to the light source and spectrometer, allowing it to track and compensate for position changes on the skin surface. This dynamic adjustment maintains optimal detection geometry despite movement, resolving the contradiction between increased measurement versatility and maintained spectral consistency.
Solution Approach 2:
The patent implements feedback control by continuously monitoring the relative position between the detection area and the target skin region, then adjusting the detection area position accordingly. This closed-loop system ensures that even when the spectrometer moves on the body, the detection area can be repositioned to maintain consistent measurement conditions, thereby preserving measurement precision while allowing movement.
2Measurement precision
If fixed focus and fixed detection areas are used, then measurement error is reduced and reproducibility is secured, but the measurement range is limited and requires changing detection area position when foreign substances are present
Solution Approach 1:
The patent resolves this contradiction by making the detection area dynamically adjustable rather than fixed. The detection area can be repositioned to different locations on the skin surface while maintaining optimal detection geometry through controlled movement. This allows the system to expand its measurement range to multiple locations without sacrificing the reproducibility achieved through fixed-focus optics and controlled detection parameters.
3Adaptability or versatility
If multiple detection areas are used to increase measurement range, then more measurements can be made, but the system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the detection function into multiple detection areas that can be selectively activated. Rather than requiring multiple complete spectrometer systems, the single spectrometer can sequentially or simultaneously engage different detection areas to measure different skin regions. This segmented approach increases measurement range while avoiding the full complexity of multiple independent measurement systems.
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
A spectroscopy system includes detectors configured to obtain detection spectrums of respective detection areas that are located at different positions of an object; and an information processor configured to obtain a target spectrum of a target area by using position information of the detection areas and the detection spectrums obtained by the detectors.