Charged Seed Cloud for Airborne Agent Scavenging

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Solution Overview

Problem

The existing methods for generating clouds of seedant particulates to detect and neutralize airborne biological agents, such as Anthrax, are limited by the low probability of collisions between seed and target particles due to their size and the atmospheric conditions, requiring large quantities of seed particles and inefficient interactions.

Innovation Solution

Applying a charge to the seed particles to create a highly charged seed cloud that produces a strong electric field between the cloud and the ground, causing the seed particles to move downward and attract target particles, increasing their interaction and effective coverage area.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If large quantities of seed particles are used to increase collision probability, then the number of interactions with target particles increases, but the quantity of substance required becomes impractically large

Engineering Contradiction:

Improvenumber of interactionsVSAvoidquantity of seed particles

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The patent applies electrostatic charging to seed particles, changing their electrical parameter from neutral to highly charged state. This parameter change creates strong electric fields that dramatically increase collision probability with target particles, allowing effective operation with much smaller quantities of seed particles compared to uncharged systems

Inventive Principle:

Principle #35Parameter changes

2Productivity

If seed particles are made larger to increase collision cross-section, then collision probability increases, but the particles become too large for Brownian motion to efficiently diffuse them

Engineering Contradiction:

Improvecollision probabilityVSAvoiddiffusion speed

Core Design Contradiction:

ProductivityVSSpeed

Solution Approach 1:

The patent replaces Brownian motion (thermal diffusion mechanism) with electrostatic attraction as the primary collision mechanism. By charging seed particles, the system substitutes random thermal motion with directed electrostatic forces, enabling efficient collision capture without relying on particle size for diffusion

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Speed

If seed particles are made smaller to enable Brownian motion diffusion, then diffusion efficiency increases, but the particles fall below the size where inertial impact routinely takes place

Engineering Contradiction:

Improvediffusion efficiencyVSAvoidcollision probability

Core Design Contradiction:

SpeedVSProductivity

Solution Approach 1:

The patent substitutes both Brownian motion and inertial impact mechanisms with electrostatic attraction. By charging small seed particles, the system creates long-range electrostatic forces that dominate over gravitational and inertial effects, enabling highly efficient collision capture of target particles regardless of the seed particle size

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Productivity

If uncharged seed particles are used, then the system is simpler to implement, but the collision probability between seed and target particles is extremely low

Engineering Contradiction:

Improvecollision probabilityVSAvoidsystem complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent changes the electrical charge parameter of seed particles from neutral to highly charged. This single parameter change fundamentally transforms the interaction mechanism from rare random collisions to frequent electrostatically-driven collisions, dramatically improving productivity while the added complexity of charging remains manageable

Inventive Principle:

Principle #35Parameter changes

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 significantly enhances the number of interactions between seed and target particles, allowing for effective detection, neutralization, and removal of airborne agents with a much smaller quantity of seed particles, improving the efficiency and practicality of the process.

Implementation Method 1

Applying a charge to the seed particles so that the seed cloud formed by release of the seed particles at altitude is highly charged, which in turn produces a strong electric field between the seed cloud and ground

Methodology Applied

Scientific EffectElectric field: Electric Field

Implementation Method 2

The relatively strong electric field causes the seed particles to move downward (toward the ground) at a velocity sufficient to increase interactions between the seed particles and the target particles

Methodology Applied

Scientific EffectElectrostatic attraction: Ion Repulsion/Attraction

Data Source

PatentUS8373962B2Charged seed cloud as a method for increasing particle collisions and for scavenging airborne biological agents and other contaminants

Publication Date: 2013.02.12 PERATON INC

AI summary

A system and method is provided for increasing interaction between seed particles in a seed cloud and target particles to be neutralized, detected or knocked down to the ground. This is achieved by applying a charge to the seed particles so that the seed cloud formed by release of the seed particles at altitude is highly charged, which in turn produces a strong electric field between the seed cloud and ground. The relatively strong electric field causes the seed particles to move downward (toward the ground) at a velocity sufficient to increase interaction (collisions) between the seed particles and the target particles.