Darkroom Security Inspection Apparatus Non-Destructive Sampling
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Solution Overview
Problem
Traditional IMS-based security inspection technologies are inconvenient for sampling, leading to low detection efficiency and often require destructive sampling or unpacking of items, which is impractical for rapid on-site inspections.
Innovation Solution
A darkroom type security inspection apparatus featuring a sampling assembly with a conveyor unit and X-ray detection for positioning, a sample processing assembly for concentration and desorption, and a sample inspecting assembly using GC-IMS or separated ion mobility spectrometry, allowing for non-destructive, rapid, and accurate detection of various sizes of goods without unpacking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional IMS-based security inspection equipment is used, then the detection sensitivity for chemical substances is improved, but the sampling convenience deteriorates and detection efficiency decreases
Solution Approach 1:
The inspection system is divided into independent functional modules: conveyor unit for object transport, sampling unit for non-destructive sample collection, processing unit for sample preparation, and detection unit for analysis. This modular segmentation allows each component to be optimized independently, maintaining high detection sensitivity while improving sampling convenience through automated operations.
Solution Approach 2:
A sampling interface is introduced as an intermediary between the object to be inspected and the detection system. This interface enables non-destructive sample collection without requiring unpacking or direct contact with the object, thereby improving sampling convenience while preserving detection sensitivity through controlled sample transfer.
2Measurement precision
If traditional IMS-based security inspection equipment is used, then the detection sensitivity for chemical substances is improved, but the detection efficiency decreases
Solution Approach 1:
The sample is collected and prepared in advance through automated sampling and processing units before detection. This preliminary action ensures that when the sample reaches the detection unit, it is already in the optimal state for analysis, thereby maintaining high detection sensitivity while improving overall detection efficiency through streamlined workflow.
Solution Approach 2:
The conveyor unit enables continuous transport of objects through the inspection system, while the sampling and processing units operate continuously to prepare samples for detection. This continuous operation eliminates idle time between detection cycles, improving detection efficiency while maintaining sensitivity through uninterrupted sample flow.
3Measurement precision
If destructive sampling is used to improve detection accuracy, then the measurement precision is improved, but the object integrity deteriorates
Solution Approach 1:
A sample is extracted from the object through the sampling interface without destroying the object itself. This extracted sample is then processed and analyzed to achieve high detection accuracy, while the original object remains intact and undamaged, preserving its integrity and composition.
Solution Approach 2:
The sampling interface is designed to collect samples from specific locations on the object's surface or interior without affecting the overall object structure. This localized sampling approach enables accurate chemical detection while maintaining the global integrity and composition stability of the inspected object.
4Measurement precision
If unpacking is required to improve detection accuracy, then the measurement precision is improved, but the operation complexity increases
Solution Approach 1:
The sampling unit is designed to automatically collect samples from objects without requiring manual unpacking or intervention. The system performs self-service sampling through automated mechanisms that access and collect samples while the object remains packaged, thereby maintaining detection accuracy while reducing operational complexity.
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
Enables high-speed, accurate, and non-destructive sampling and detection of chemical substances, suitable for rapid inspections in customs and other settings, improving detection efficiency and sensitivity for volatile and semi-volatile substances.
Implementation Method 1
a X-ray detection unit to detect a position of the objected to be inspected
Implementation Method 2
a sample inspecting assembly configured to inspect composition of the sample by means of a gas chromatographic-ion mobility spectrometer
Implementation Method 3
Ion mobility spectrometry (IMS) technology, due to its characteristics of simple structure, high sensitivity, and rapid analysis
Implementation Method 4
a sample processing assembly configured to concentrate and desorb the sample
Data Source
AI summary
A darkroom type security inspection apparatus and a method of performing an inspection using the darkroom type security inspection apparatus. An apparatus includes a housing constituting a closed darkroom, and assemblies disposed inside the housing. The assemblies disposed inside the housing include: a sample collecting unit configured to collect a sample, a conveyor unit, and a X-ray detection unit to detect a position of the objected to be inspected, wherein the X-ray detection unit is configured to determine the position of the objected to be inspected within the sampling assembly so that the object to be inspected together with the conveyor unit is conveyed to an expected position; and a sample processing assembly, wherein the assemblies disposed inside the housing are communicated by fittings or connectors.