Modular X-ray Backscatter System for Portable Personnel Screening
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Solution Overview
Problem
Current radiation-based personnel screening systems are bulky, difficult to transport, and limited in detecting non-metallic objects, with poor image quality due to low radiation doses, making them unsuitable for portable and high-throughput applications, especially in public venues and military settings.
Innovation Solution
A modular X-ray backscatter system with detachable components, including detector towers and an X-ray source, optimized for compactness, light weight, and rapid assembly, allowing for efficient detection of threats and high image clarity without excessive radiation exposure, using a pencil beam and dual-axis scanning to enhance detection range and throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional portal systems are used for radiation-based screening, then detection capability is provided, but the system becomes bulky and difficult to transport
Solution Approach 1:
The system is divided into separate functional modules: a radiation source module, a detector module, and a processing module. Each module can be independently transported and assembled at the deployment location, eliminating the need to transport a complete bulky portal system while maintaining full detection capability.
Solution Approach 2:
The detector module is positioned within or adjacent to the radiation source module, with components nested within each other to minimize overall footprint. The modular design allows compact packaging for transport while enabling full functionality when assembled.
2Object-affected harmful factors
If low radiation doses are used to reduce exposure, then safety is improved, but image quality deteriorates
Solution Approach 1:
The system employs continuous scanning of the radiation beam across the subject's body, accumulating detection data continuously rather than relying on single high-dose pulses. This continuous action allows sufficient signal accumulation for good image quality while maintaining low instantaneous and total radiation doses.
Solution Approach 2:
A scintillator crystal is introduced as an intermediary between the radiation source and detector. The scintillator converts radiation into light signals, enabling more efficient detection and improving signal-to-noise ratio, which allows maintaining image quality at lower radiation doses.
3Reliability
If manual searching is used to detect non-metallic objects, then detection capability is provided, but the process becomes slow and inconvenient
Solution Approach 1:
The system replaces manual mechanical searching with an automated radiation-based detection system. The radiation source and detector automatically scan the subject's body, detecting non-metallic objects through their radiation scattering properties, eliminating the need for manual physical search while significantly increasing screening speed.
4Reliability
If heavy back-end cables and wires are used for connecting components, then system functionality is maintained, but compactness and portability are reduced
Solution Approach 1:
The heavy back-end cables and wires are extracted from the system design. Each modular component includes its own integrated electronics and power supply, eliminating the need for extensive external cabling. This extraction significantly reduces the volume and weight of the system while maintaining full functionality through wireless or minimal-connection interfaces.
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 system provides effective threat detection of various materials, including low-Z objects, with improved image quality and reduced radiation exposure, enabling rapid scanning and portability, meeting stringent portability and safety standards for diverse deployment scenarios.
Implementation Method 1
images of various types of material can be generated using X-ray scattering. The intensity of scattered X-rays is related to the atomic number (Z) of the material scattering the X-rays.
Implementation Method 2
a first detection system configured to detect radiation scattered from a person
Data Source
AI summary
The present specification discloses an inspection system for detecting objects being carried by a person. The inspection system is highly modular and capable of being assembled by a two person team using conventional tooling equipment. In one embodiment, the inspection system has three primary modules—two detection modules and one radiation source module—that can be readily attached and detached from each other or to a frame and connected to a signal processing system to provide for a quick set up and tear down process.