Handheld Multi-Function Detection Wand for Chemical Residue Screening
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Solution Overview
Problem
Current trace detection portal systems face inefficiencies in dislodging and collecting explosive particles from human bodies, and lack the ability to perform exhaustive searches for multiple threats, particularly in scenarios where physical contact is undesirable and false alarms are common.
Innovation Solution
A handheld multi-function detection wand is developed, equipped with a sampling component and integrated ion mobility spectrometer, which uses impinging and suction air flows to collect particles and vapors from close proximity, incorporating additional detectors for comprehensive threat detection, including metal, biological, and chemical agents, while minimizing size and weight and avoiding radioactive materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large scale air handling system is used to release and collect explosive particles, then the detection coverage is improved, but the system complexity and size increase significantly
Solution Approach 1:
The patent extracts the core sampling function from the complex large-scale air handling system and implements it in a simplified handheld wand configuration. The wand contains essential components (air jet, suction port, sample collector) that can be manually positioned close to the target area, eliminating the need for elaborate infrastructure while maintaining effective particle collection capability
Solution Approach 2:
The patent introduces an intermediary sampling mechanism where a handheld wand with integrated air jet and suction port serves as a bridge between the target area and the detection system. This intermediary device enables flexible, close-proximity sampling without requiring direct integration of the full detection system at the sampling location
2Productivity
If a handheld wand with close proximity sampling is used, then the particle collection efficiency is improved, but the device portability and ease of operation may be compromised
Solution Approach 1:
The patent segments the detection system into a portable handheld wand for sampling and a separate detection system for analysis. The wand is designed to be compact and maneuverable with essential sampling components (air jet, suction port, sample collector), while the bulk of the detection instrumentation can be positioned remotely or integrated in a compact form factor
Solution Approach 2:
The patent implements dynamic positioning capability where the handheld wand can be manually moved to optimal locations close to the target area, allowing flexible adaptation to different screening scenarios and target positions, thereby maintaining high collection efficiency across varied operational conditions
3Adaptability or versatility
If multiple detectors are integrated into the handheld wand, then the multi-threat detection capability is improved, but the device size and weight increase
Solution Approach 1:
The patent integrates multiple detection capabilities (chemical, metal, biological detectors) into a single handheld wand platform, enabling comprehensive multi-threat detection with one device. The wand is designed to accommodate various detector types that can operate simultaneously or sequentially, providing universal screening capability across different threat categories
Solution Approach 2:
The patent merges multiple detection functions and components (sampling system, chemical detector, metal detector, biological detector) into an integrated handheld unit. By combining these functions in a unified platform with shared components (power supply, housing, control electronics), the overall weight and complexity are managed while achieving multi-threat detection capability
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 handheld wand enhances the efficiency of explosive and chemical residue collection and detection, reduces false alarms, and allows for simultaneous detection of multiple threats, providing a non-contact, socially acceptable screening method that is more effective than traditional portal systems.
Implementation Method 1
inserting the sampling trap in a detector such as an ion mobility spectrometer for analysis
Implementation Method 2
uses impinging and suction air flows to collect particles and vapors from close proximity
Implementation Method 3
uses impinging and suction air flows to collect particles and vapors from close proximity
Data Source
AI summary
This invention describes a sample collection method that could release and collect residues of explosives and other chemicals from a surface; the described method is implemented into a compact detection system that can be used as a “wand” for screening chemicals residues on human body. The wand configuration includes multiple functionalities for contrabands detection. The invention further describes a desorption method that can control chemical fragmentation pathway during desorption. The invention describes a combined detection device that detects trace chemicals and metal at the same time.