Plastic Electrode Particle Mobility Analyzer
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Solution Overview
Problem
Existing particle mobility analyzers are limited by the need for solid metals for electrical conductivity, restricting manufacturing versatility, portability, and cost-effectiveness.
Innovation Solution
A particle mobility analyzer using a plastic core with embedded conductive materials, such as carbon nanotubes, and a metallic coating, allowing for reduced weight, lower manufacturing costs, and varied designs through methods like 3-D printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solid metals are used for electrodes to ensure electrical conductivity, then electrical conductivity is maintained, but weight and manufacturing cost increase
Solution Approach 1:
The patent uses a composite structure where a plastic core material is combined with conductive materials (such as conductive paint, metallic coatings, or embedded conductive elements) to create electrodes that maintain electrical conductivity while significantly reducing weight compared to solid metal electrodes. This composite approach allows the non-conductive plastic to provide structural support while the conductive layer provides the necessary electrical properties.
2Reliability
If solid metals are used for electrodes, then electrical conductivity is ensured, but manufacturing versatility and design flexibility are restricted
Solution Approach 1:
The combination of plastic core material with conductive coatings or embedded conductive elements enables versatile manufacturing methods including 3-D printing, molding, and various coating techniques. This composite structure allows for complex geometries and customized designs that would be difficult or expensive to achieve with solid metal electrodes, while maintaining the necessary electrical conductivity through the conductive layer.
3Reliability
If solid metals are used for electrodes, then electrical conductivity is maintained, but manufacturing cost increases
Solution Approach 1:
The plastic core material is generally less expensive than solid metals, and the conductive coatings or embedded conductive elements can be applied through cost-effective methods such as spray coating, dip coating, or embedding during molding. This composite approach reduces material costs while maintaining the necessary electrical conductivity, making the analyzer more cost-effective to manufacture.
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
The solution enables a lightweight, cost-effective, and versatile particle mobility analyzer with improved accuracy due to the proximity of the particle counter and reduced material density, enhancing portability and design flexibility.
Implementation Method 1
The electrical field between the electrodes causes charged particles to be attracted through the sheath air to the charged collector electrode. The electrical mobility of the collected particles is a function of the dimensions of the DMA, the applied voltage, and the aerosol flow rate.
Implementation Method 2
This creates an electric field in an annular space between the two electrodes.
Implementation Method 3
A particle mobility analyzer using a plastic core with embedded conductive materials, such as carbon nanotubes, and a metallic coating
Data Source
Figure 1
AI summary
Mobility analyzer comprising a first electrode and a second electrode, one of said electrodes being grounded and th other of said electrodes being connectable to a high-voltage source, which analyzer further comprises an aerosol inlet and an sheath flow outlet as well as at least one sample flow channel with a sample inlet and a sample outlet, wherein the electrodes are embodied in a plastic material provided with a electrically conductive coating.