UV Fluorescence Detection for Real-Time Microplastic Measurement
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Solution Overview
Problem
Current systems for measuring microplastics in water are inaccurate due to uneven distribution and lack real-time data, leading to unreliable estimates of plastic concentrations.
Innovation Solution
A system utilizing UV light to measure microplastic fluorescence, comprising EM radiation emitters, photoresistors, and a controller for real-time monitoring, integrated with a fluid conduit to prevent external light interference and enable continuous analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional sampling methods are used to measure microplastics in water, then the system is simple to operate, but the measurement accuracy is poor due to uneven distribution of microplastics
Solution Approach 1:
The patent replaces traditional mechanical sampling and laboratory analysis with an optical detection system. UV lights illuminate the water column, causing microplastics to fluoresce, which are then detected by photodetectors. This substitution of mechanical sampling with optical fields enables continuous, real-time measurement without physical contact, resolving the contradiction between measurement accuracy and system complexity.
Solution Approach 2:
The patent introduces UV light as an intermediary to detect microplastics indirectly through fluorescence. Instead of directly measuring or sampling microplastics, the system uses UV illumination to excite fluorescent emissions from microplastics, which are then detected. This intermediary approach enables accurate measurement of otherwise difficult-to-detect particles without complex sampling equipment.
2Loss of time
If laboratory analysis is used for microplastic detection, then the equipment is simple, but real-time data is not available due to delayed feedback
Solution Approach 1:
The patent implements continuous illumination of the water column with UV lights and continuous detection by photodetectors, enabling real-time measurement of microplastic concentrations. This continuous operation eliminates the time delays inherent in batch laboratory analysis, providing immediate feedback while maintaining measurement accuracy through sustained optical detection.
Solution Approach 2:
The patent replaces time-consuming mechanical laboratory analysis procedures with instantaneous optical detection. The fluorescence-based detection method provides real-time data without the delays of sample collection, transport, and laboratory processing, resolving the contradiction between speed and accuracy.
3Measurement precision
If random location sampling is performed, then the sampling process is simple, but the estimate of plastic concentrations is unreliable due to uneven distribution
Solution Approach 1:
The patent transitions from point-based random sampling to continuous spatial mapping by illuminating and detecting across the entire water column. The system scans multiple locations simultaneously or sequentially, building a comprehensive spatial distribution map of microplastics. This dimensional expansion from discrete points to continuous space enables accurate concentration estimation without complex sampling strategies.
Solution Approach 2:
The patent uses UV light and fluorescence as intermediaries to detect microplastics across the entire water column, eliminating the need for physical sampling at discrete locations. This intermediary detection method provides comprehensive spatial coverage and accurate concentration estimates while maintaining operational simplicity.
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
Provides accurate, real-time measurement of microplastic concentrations, allowing for immediate insights into aggregation patterns and higher concentration areas in aquatic environments.
Implementation Method 1
when plastics are subjected to Ultraviolet (UV) light in dark environments, plastics exhibit fluorescence, a process where plastics absorb light, or other Electromagnetic (EM) radiation, and light is emitted
Implementation Method 2
The at least one photoresistor detect the light emitted by the microplastics in the sample water after absorbing the UV light
Data Source
AI summary
A system for measuring microplastics in an aquatic environment is a system that provides practical and accurate means of assessing the presence of plastics in a body of water. The system may include an electronics housing, Electromagnetic (EM) radiation emitters, a photoresistor, a controller, a power source, and a fluid conduit. The electronics housing is a portable hermetic structure that protects the electronic and electrical components from water damage. The EM radiation emitters emit Ultraviolet (UV) light that is absorbed by the microplastics in the sample water being analyzed. The photoresistor detects the light emitted by the microplastics in the sample water after absorbing the UV light. The controller processes the sensor signals from the at least one photoresistor to generate analysis data. The power source provides the energy necessary for the operation of the system. The fluid conduit enables the controlled flow of the sample water for analysis.