Passive Active Terahertz Security Inspection System
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Solution Overview
Problem
Traditional security inspection methods are inefficient, especially during peak hours, and existing terahertz and millimeter wave technologies have limitations in imaging resolution and penetration, making it difficult to accurately identify contraband without interfering with crowd flow.
Innovation Solution
A personnel security inspection system combining passive and active terahertz/millimeter wave devices, where passive devices provide real-time dynamic imaging for initial screening and active devices perform re-inspection on suspected individuals in a separate area, allowing for efficient and accurate detection of contraband without disrupting crowd movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If passive millimeter wave and terahertz imaging is used for long-distance dynamic imaging, then non-interventional security inspection is achieved, but imaging resolution is low and penetration is not high
Solution Approach 1:
The system divides the inspection process into two segments: passive imaging for initial screening and active imaging for re-inspection. This segmentation allows each method to be used where it is most effective, resolving the contradiction between non-interventional operation and imaging resolution.
Solution Approach 2:
The system dynamically switches between passive and active imaging modes based on the inspection needs. Passive mode is used for general crowd screening, while active mode is activated for suspected individuals, making the system adaptable to different operational requirements.
2Measurement precision
If active millimeter wave imaging is used for short-range imaging, then clear imaging with higher penetration is achieved, but it requires intervention and is not suitable for general use
Solution Approach 1:
The system separates the use of active imaging from general crowd screening, restricting it to re-inspection of suspected individuals only. This segmentation eliminates the need for intervention during general screening while maintaining high-resolution capability when needed.
Solution Approach 2:
Instead of applying active imaging to all persons (excessive action), the system applies it only to suspected individuals (partial action), thereby maintaining high resolution where needed while avoiding unnecessary intervention for the majority.
3Reliability
If traditional security gates are used to detect metal articles, then security inspection is performed, but people must pass through one by one causing serious congestion
Solution Approach 1:
The system replaces traditional mechanical security gates with electromagnetic wave-based passive imaging technology, enabling simultaneous screening of multiple persons without physical contact or sequential processing, thereby dramatically improving throughput while maintaining security.
Solution Approach 2:
The system enables dynamic, real-time imaging of moving persons without requiring them to stop or pass through physical gates one by one, allowing continuous crowd flow while maintaining inspection 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
This system improves inspection efficiency and accuracy, reducing the need for extensive manual checks and minimizing personnel requirements, while ensuring effective security screening in high-traffic areas.
Implementation Method 1
acquire, for example, terahertz and/or millimeter wave radiation emitted from a person
Implementation Method 2
acquire, for example, terahertz and/or millimeter wave radiation emitted from a person
Implementation Method 3
irradiating a static person with terahertz and/or millimeter wave in a re-inspection area and collecting reflected wave
Implementation Method 4
irradiating a static person with terahertz and/or millimeter wave in a re-inspection area and collecting reflected wave
Data Source
Figure 1~2
Figure 3~4
AI summary
The disclosure provides a personnel security inspection system and security inspection method. The personnel security inspection system includes a passive terahertz and/or micrometer wave inspection device and an active terahertz and/or micrometer wave inspection device provided at a security inspection site. The passive terahertz and/or micrometer wave inspection device is configured acquire terahertz and/or micrometer wave of a person in a crowd travelling through a security inspection passage and forms a real-time dynamic inspection image of the person. The active terahertz and/or micrometer wave inspection device is configured to acquire an active terahertz and/or micrometer wave inspection image of a static person in a re-inspection area.