Electrostatic Particulate Capture Substrate for Real-Time Air Monitoring
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Solution Overview
Problem
Current air particulate monitoring technologies are limited in the information they can provide due to sensing limitations and short analysis times, are large and expensive, making them impractical for widespread deployment, and lack the ability to dynamically adjust to real-time data and optimize sensing performance.
Innovation Solution
The system captures particles using electrostatic precipitation and mechanical captors, allowing for dynamic adjustments in air flow and imaging specifications, and replenishes the substrate to maintain optimal sensing performance, enabling widespread, inexpensive, and non-intrusive monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional particulate monitoring systems are deployed, then measurement precision is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent extracts the particle capture function from complex traditional monitoring systems and implements it separately using electrostatic precipitation plates. This allows simple, low-cost devices to achieve particle capture capability without requiring the full complexity of traditional systems, thereby resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
The patent uses imaging sensors to capture optical images of particles, creating a visual copy that preserves particle characteristics. This copying approach enables detailed particle analysis through image processing while avoiding the need for complex physical analysis instruments, thus maintaining measurement precision while reducing device complexity and cost.
2Measurement precision
If traditional particulate monitoring systems are deployed, then measurement precision is improved, but loss of time increases due to short analysis windows
Solution Approach 1:
The patent performs preliminary particle capture using electrostatic precipitation, which accumulates particles on charged plates before analysis. This preliminary action allows particles to be collected and held in place, providing sufficient time for detailed imaging and analysis without the time pressure of traditional flow-based systems, thereby resolving the contradiction between measurement precision and analysis time.
Solution Approach 2:
The patent implements dynamic control of the electrostatic precipitation process, allowing adjustment of capture and analysis timing based on particle concentration and analysis requirements. This dynamic approach optimizes the balance between capturing enough particles for precise measurement and allowing sufficient analysis time, resolving the time-related contradiction.
3Productivity
If electrostatic precipitation is used to capture particles, then particle capture efficiency is improved, but energy consumption increases
Solution Approach 1:
The patent employs periodic charging and discharging of the electrostatic precipitation electrodes rather than continuous operation. Particles are captured during charging phases, then the electrodes are discharged to release accumulated charge. This periodic operation maintains high particle capture efficiency while significantly reducing average energy consumption compared to continuous operation, resolving the contradiction between productivity and energy use.
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
This approach allows for comprehensive and real-time monitoring of air particulate matter, providing detailed information about particle characteristics and sources while being cost-effective and deployable in various environments.
Implementation Method 1
capturing is performed using one or more of electrostatic and mechanical captors... electrostatic precipitation can be accomplished by (1) charging an conductive substrate with one charge, and (2) charging particles in collected air with another charge opposite the charge of the substrate. The particles can be charged generating charge carriers with an electrode, causing the particles to charge and deflect in the direction of the oppositely charged substrate
Implementation Method 2
The particles can then be imaged or otherwise sensed by one or more sensors such as an optical or imaging sensor. Imaging by the sensors can be performed by directing light toward the substrate, which in turn causes the particles captured on the substrate to scatter light. The scattered light is detected by the sensor
Data Source
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AI summary
Systems and methods for monitoring air particulate matter are provided herein that capture particles from the air for analysis. Particles are captured using electrostatic and/or mechanical means to deflect particles toward a substrate. Electrostatic precipitation causes charged carriers to deflect towards a charged substrate. Filtration-based means employ filters and/or fibers to capture particles from air flowing therethrough. A sensor such as a camera is used to read the captured particles. An illumination source directs light towards the substrate, causing the particles to scatter light, which the sensor can detect and derive information or imaging therefrom, which can also be used for further particle or pollution analyses. The substrate can be replenished using electrostatic techniques such as reverse electrostatic force, or mechanical means such as cleaning using a brush or replacing a tape substrate. Dynamic PM monitoring detects and makes adjustments such as those related to air volume, imaging characteristics and substrate replenishment.