Particle Matter Analysis Device Using Segmented Electrical Collection
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Solution Overview
Problem
Current methods for measuring ultrafine dust concentration in air are inadequate due to high costs, complexity, and inability to provide real-time data, with existing equipment being either unreliable or requiring skilled operators and large sizes, making it difficult to accurately assess concentration variations in urban areas.
Innovation Solution
A compact, low-cost particle matter analysis device that includes a charger, electrophoretic mobility particle collector, aerodynamic particle collector, filter, and processor to measure particle density in real-time by calculating currents from these components, allowing for precise measurement of ultrafine dust density using a micro-electro mechanical systems (MEMS) process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-priced analysis equipment such as SMPS or ELPI is used to obtain accurate average density value, then measurement precision is improved, but device complexity and cost increase, and portability deteriorates
Solution Approach 1:
The device segments the particle collection process into three distinct collectors (electrophoretic mobility particle collector, aerodynamic particle collector, and filter) that operate in sequence. Each collector handles a specific portion of the particle size range or collection mechanism, allowing the system to achieve comprehensive and accurate density measurements without requiring a single complex instrument like SMPS or ELPI.
Solution Approach 2:
The invention replaces complex mechanical analysis systems with an electrical measurement approach. By measuring the current generated by charged particles in each collector and using processor-based calculations to determine density from these electrical signals, the system achieves accurate measurements without the mechanical complexity of traditional instruments.
2Measurement precision
If conventional mass concentration measuring equipment is used to collect ultrafine dust for predetermined period, then measurement precision is improved, but productivity deteriorates due to inability to provide real-time data
Solution Approach 1:
The device enables continuous real-time measurement of ultrafine dust concentration by processing particles as they pass through the collectors without requiring accumulation over a predetermined period. The processor continuously calculates density and concentration from the current signals generated by charged particles, providing immediate results rather than delayed batch analysis.
3Productivity
If turbidity meter is used for real-time measurement, then productivity is improved, but measurement precision deteriorates due to low reliability
Solution Approach 1:
The invention replaces optical measurement methods (turbidity meter) with an electrical measurement system. By charging particles and measuring the current they generate as they pass through collectors, the system achieves both real-time measurement capability and high accuracy, overcoming the reliability limitations of optical methods.
4Productivity
If optical particle counter is used to calculate mass concentration by uniformly applying average density value, then productivity is improved, but measurement precision deteriorates due to significant variation in actual density
Solution Approach 1:
The device dynamically determines the actual density parameter of particles by measuring their electrophoretic mobility and aerodynamic properties, then uses this measured density value in mass concentration calculations. This replaces the static uniform density assumption with a variable, measurement-based density parameter that adapts to the actual particle characteristics being analyzed.
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 accurate, real-time measurement of ultrafine dust density with improved portability and cost-effectiveness, enhancing the accuracy of mass concentration calculations compared to traditional methods.
Implementation Method 1
a charger configured to receive power from a power supply device and to charge particles included in intaken air
Implementation Method 2
an electrophoretic mobility particle collector configured to collect particles having electrophoretic mobility greater than a predetermined electrophoretic mobility among the charged particles based on an electrophoretic mobility
Implementation Method 3
an aerodynamic particle collector configured to collect charged particles passing through the electrophoretic mobility particle collector based on an inertial force of the charged particles
Data Source
AI summary
A particle matter analysis device, an analysis method and a manufacturing method are disclosed. The particle matter analysis device includes a charger configured to receive power from a power supply device and to charge particles included in intaken air, an electrophoretic mobility particle collector configured to collect particles having electrophoretic mobility greater than a predetermined electrophoretic mobility among the charged particles based on an electrophoretic mobility and to measure a current of electrophoretic mobility particles, an aerodynamic particle collector configured to collect charged particles passing through the electrophoretic mobility particle collector based on an inertial force of the charged particles and to measure a current of aerodynamic particles, a filter configured to collect charged particles passing through the aerodynamic particle collector and to measure a current of filtered particles, and a processor, wherein the processor calculates a density of the particles based on a ratio of the current of electrophoretic mobility particles, the current of aerodynamic particles, and the current of filtered particles.