Photochromic Fluid Flow Visualization in Dynamic Lubrication
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Solution Overview
Problem
Current methods for visualizing fluid flow, such as those using photochromic reactions, face challenges in accurately measuring lubrication conditions due to noise from surface movement, air bubbles, and other environmental changes, particularly when the measured object is in a moving or changing environment.
Innovation Solution
A measurement method and system that utilize a photochromic compound dissolved in the fluid, where the compound's absorption changes with transformation-inducing light, allowing for imaging in specific wavelength ranges to reduce noise and enhance visualization and thickness measurement accuracy, by taking images before and after irradiation with transformation-inducing light and processing these images to create a noise-reduced visualization of fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If images are taken using white light for observation, then the fluid flow can be visualized, but noise from surface movement, air bubbles, and environmental changes obstructs detailed understanding
Solution Approach 1:
The patent segments the illumination light into multiple wavelength components using a diffraction grating, separating the light into different wavelengths that correspond to different absorption characteristics of the photochromic compound. This allows selective imaging at wavelengths that maximize contrast between the fluid flow and background noise.
Solution Approach 2:
The patent changes the imaging parameter by using multiple wavelength ranges instead of a single broad-spectrum white light. By capturing images at different wavelengths where the photochromic compound has different absorption characteristics, the system can enhance signal-to-noise ratio and reduce the impact of environmental interference.
2Loss of information
If a photochromic compound is used to visualize fluid flow, then lubrication conditions can be understood, but the measurement environment complexity increases due to moving bodies and changing conditions
Solution Approach 1:
The patent introduces a diffraction grating as an intermediary optical element that separates the illumination light into multiple wavelengths. This intermediary device enables wavelength-selective imaging without requiring complex mechanical adjustments or multiple light sources, thereby managing measurement environment complexity while preserving lubrication condition information.
3Measurement precision
If multiple wavelength images are captured and processed, then noise-reduced visualization is achieved, but the measurement process complexity increases
Solution Approach 1:
The patent performs preliminary action by capturing multiple wavelength images simultaneously or in rapid succession before the fluid flow changes significantly. This preliminary capture of multi-wavelength data allows subsequent processing to extract accurate fluid thickness information without requiring complex real-time processing during fluid motion.
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 clear visualization of fluid flow and accurate measurement of fluid thickness even in dynamic environments, reducing the impact of noise from surface movement and air bubbles, thereby improving the understanding of lubrication conditions.
Implementation Method 1
a photochromic reaction is a phenomenon in which the absorption spectrum of a substance changes with the change in the molecular structure of a photochromic component of the substance, caused by the substance being irradiated with light such as ultraviolet light
Implementation Method 2
By illuminating the part of the engine oil being measured with illumination light used for observation, reflected light from the engine oil (to be precise, light that passes the engine oil and is reflected from the engine behind the engine oil) is obtained
Data Source
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AI summary
According to the present invention, a measurement method for visualizing the flow of a fluid (23) has: a preparation step for dissolving, in the fluid (23), a photochromic compound of which the amount of light absorption changes when the photochromic compound is irradiated with a transformation-generating light (31); a transformation-generating light irradiating step for irradiating the fluid (23) with the transformation-generating light (31) that causes photochromism; and a post-transformation image capturing step for capturing an image of the fluid (23) irradiated with the transformation-generating light. In the post-transformation image capturing step, a first image (B) is generated by capturing the image of the fluid (23) using first light in a first wavelength range, wherein the amount of light absorption of the first light changes due to the irradiation of the transformation-generating light (31).