Blood Vessel Detection Using Multi-Wavelength Depth and Angle Sensing
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Solution Overview
Problem
Conventional blood vessel search methods are two-dimensional and unsuitable for non-invasive lipid measurement due to the presence of multiple tissues between the blood vessels and epidermis, leading to inaccurate measurements.
Innovation Solution
A blood vessel detection device and method using multiple wavelength lights to calculate blood vessel depth and angle information, determining a suitable measurement position by analyzing light intensities and absorption characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional two-dimensional blood vessel search method is used, then the measurement process is simple, but the measurement precision is insufficient due to the presence of multiple tissues between blood vessels and epidermis
Solution Approach 1:
The patent transitions from two-dimensional surface detection to three-dimensional spatial detection by introducing depth information through multi-wavelength light absorption measurements. The system calculates blood vessel depth based on light intensity differences at various wavelengths, enabling accurate localization of blood vessels beneath multiple tissue layers.
Solution Approach 2:
The patent utilizes changes in light absorption parameters at different wavelengths to detect blood vessel characteristics. By measuring light intensity at multiple wavelengths with different absorption coefficients by hemoglobin and water, the system can distinguish blood vessels from surrounding tissues and calculate their depth and orientation.
2Measurement precision
If multiple wavelength lights are used to calculate blood vessel depth and angle information, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The patent designs the light emitting-receiving unit to perform multiple functions: irradiating with multiple wavelengths, detecting light intensity at various positions, and calculating both depth and angle information. This multi-functional approach consolidates what could be separate systems into a single integrated unit, reducing overall system complexity while maintaining high measurement precision.
3Adaptability or versatility
If blood vessel depth and angle information are calculated using light intensity analysis, then the suitability for non-invasive measurement is improved, but the calculation complexity increases
Solution Approach 1:
The patent replaces complex mechanical or invasive measurement systems with optical-based detection. By using light intensity measurements at multiple wavelengths and positions, the system calculates blood vessel depth and angle information non-invasively, eliminating the need for physical contact or surgical intervention while maintaining measurement accuracy.
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
Enhances the precision and accuracy of non-invasive lipid measurements by identifying optimal measurement positions based on blood vessel depth and angle information.
Implementation Method 1
a first irradiation unit that irradiates a predetermined position of a subject with a light having a first wavelength with a smaller absorption by hemoglobin or by water and a light having a second wavelength with a larger absorption by hemoglobin or by water than that of the first wavelength
Implementation Method 2
a light intensity detection unit that detects a light intensity at not less than one position, the light intensity emitted from the subject at a predetermined distance or at continuous positions from irradiation positions of the lights
Data Source
AI summary
A blood vessel detection device comprises: a first irradiation unit for irradiating a predetermined site of a subject with light of a first wavelength that is absorbed less by hemoglobin or water and light of a second wavelength that is absorbed more by hemoglobin or water than the first wavelength; a second irradiation unit for irradiating the predetermined site with light of a third wavelength that is absorbed less by hemoglobin; a light intensity detection unit for detecting the intensity of light emitted from the subject at one or more positions spaced apart by a predetermined distance from the light irradiation positions of the first and second irradiation units or one or more contiguous positions; and a control unit that calculates blood vessel depth information, calculates blood vessel angle information, and determines an optimal position for measurement based on the blood vessel depth information and the blood vessel angle information.