Container Vent Odor Sniffing for Low-Atomic-Number Detection
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Solution Overview
Problem
Conventional container inspection systems struggle to accurately detect low atomic number substances such as volatile toxic and harmful substances, flammable and explosive hazardous chemicals, drugs, and explosives using X-ray fluoroscopy or backscatter imaging, and existing detection technologies like GC-IMS have insufficient resolving ability for complex components and long detection times, making rapid and accurate on-site detection difficult.
Innovation Solution
An odor sniffing device with a primary sampling front end and cyclone concentration sampler that collects gas and particulate matter from a container's ventilator, combined with a secondary gas phase detection section using ion mobility spectroscopy and gas chromatography for comprehensive analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If X-ray fluoroscopy or backscatter imaging is used for container inspection, then imaging capability is provided, but detection accuracy for low atomic number substances (volatile toxic substances, flammable chemicals, drugs, explosives) deteriorates
Solution Approach 1:
The patent combines X-ray imaging technology with odor sniffing technology into an integrated inspection system. The X-ray system provides structural imaging while the odor sniffing system simultaneously detects volatile substances, achieving multi-functional inspection capability that resolves the limitation of X-ray alone in detecting low atomic number substances.
Solution Approach 2:
The patent introduces odor sniffing technology as an intermediary detection method to complement X-ray imaging. The odor sniffing system uses specialized sensors to detect volatile organic compounds and chemical signatures that X-ray cannot identify, serving as a mediator to enhance overall detection accuracy for specific substance types.
2Measurement precision
If GC-IMS technology is used for chemical component detection, then detection sensitivity is improved, but detection time increases
Solution Approach 1:
The patent segments the detection process into multiple parallel channels using different detection technologies. Instead of relying on a single GC-IMS system that requires lengthy analysis, the system divides detection into simultaneous X-ray imaging and odor sniffing operations, with each method handling specific detection tasks to reduce overall time while maintaining sensitivity.
Solution Approach 2:
The patent applies partial action by using odor sniffing technology to detect specific target substances (volatile toxic substances, flammable chemicals, drugs, explosives) without requiring complete chemical analysis of all components. This selective detection approach achieves sufficient sensitivity for security inspection purposes while significantly reducing detection time compared to comprehensive GC-IMS analysis.
3Ease of operation
If conventional sampling methods are used for gas collection, then sampling capability is provided, but container damage or probe contamination occurs
Solution Approach 1:
The patent extracts the sampling function from direct contact with the container interior by using odor sniffing technology that can detect substances through the container wall or ventilation openings. This extraction eliminates the need for physical penetration or insertion into the container, preventing both container damage and probe contamination while maintaining sampling 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
Enables rapid and accurate detection of complex chemical components by sniffing gas and particulate matter, providing efficient and intelligent sampling without damaging containers or probes, and allowing for quantitative detection results.
Implementation Method 1
a cyclone concentration sampler defining a cyclone chamber and including opposing first and second ends, a size of the cyclone chamber decreasing gradually from the first end to the second end
Implementation Method 2
the ion mobility spectrometry technology has been heavily equipped by customs, airports, etc., and mainly used for the detection of drugs and explosives
Implementation Method 3
Gas chromatograph is a highly efficient and stable separation tool, which is widely used in separation analysis and quantitative detection of gas phase substances
Implementation Method 4
Photoionization, infrared, microbalance, surface acoustic wave, ion mobility spectroscopy and the like are very suitable for rapid detection of toxic and harmful gases
Data Source
AI summary
Provided are an odor sniffing device (11) and a vehicle-mounted security inspection apparatus for a container (1). The odor sniffing device (11) includes a primary sampling front end (116), which has a vent adapter (116-1) having a shape matching with a vent of the ventilator of the container, so that when the primary sampling front end (116) fits with the ventilator, the vent adapter (116-1) and the vent generally cooperate to achieve fluid communication. The vehicle-mounted security inspection apparatus (1) may perform imaging inspection and chemical inspection simultaneously.