Screening System Using Shielded Region for Trace Vapor Detection
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Solution Overview
Problem
Current passenger screening systems lack direct examination for trace particles of target materials due to their rapid diffusion in open environments, leading to decreased accuracy and increased time and cost, which compromises the efficiency of security screening processes at transportation terminals.
Innovation Solution
A screening system that applies an electromagnetic field within a shielded region, measures sensor output, collects and identifies trace vapors, and determines the presence of target materials using a kiosk with inductive sensors and a processor, facilitating the detection of contraband on individuals by creating a barrier to airflow and using trace detection systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If trace particle examination is performed in an open environment, then direct detection of target material is possible, but accuracy decreases due to rapid diffusion of trace particles
Solution Approach 1:
The patent creates a controlled enclosure environment that isolates the detection region from external air currents and contaminants. This enclosed space maintains a stable atmospheric condition where trace particles do not rapidly diffuse, enabling reliable and accurate detection of target materials on passengers without the interference of open environment factors.
2Measurement precision
If trace particle examination is performed, then direct detection of target material is possible, but time and cost increase, decreasing screening efficiency
Solution Approach 1:
The system performs preliminary collection of trace particles in an enclosed space before analysis. By pre-concentrating and containing trace particles in the enclosure during a brief period, the system enables rapid subsequent detection without requiring extended sampling times, thus maintaining high screening efficiency while achieving accurate detection.
Solution Approach 2:
The patent introduces an intermediate enclosure space that mediates between the passenger and the detection system. This intermediate region captures and concentrates trace particles, serving as a buffer that allows thorough examination without directly impacting the overall screening throughput, thereby resolving the conflict between detection accuracy and screening efficiency.
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
Enhances the accuracy and reliability of trace vapor detection while maintaining the efficiency of the security screening process by containing trace particles within a shielded area, allowing for effective identification of target materials on individuals without significant increases in time or cost.
Implementation Method 1
an inductive sensor configured to apply an electromagnetic field in the region and to measure an output representative of an interaction of the electromagnetic field and a first target material located in the region
Implementation Method 2
a region at least partially enclosed by electromagnetic shielding
Data Source
AI summary
A method of operating a screening system includes applying an electromagnetic field to a subject in a region at least partially enclosed by electromagnetic shielding, and measuring an output from a sensor. The output is representative of an interaction of the electromagnetic field and the subject. A trace vapor is collected from the subject within the region, and the trace vapor is identified. Based on the measured sensor output and the identified trace vapor, whether a target material is associated with the subject is determined.