Security Inspection Equipment with Forescatter and Backscatter Detectors
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Solution Overview
Problem
Current security inspection equipment using X-ray transmission struggles to detect low-density substances like explosives and drugs, especially when hidden behind metal objects, and requires cumbersome double inspections to observe internal information on both sides of an item.
Innovation Solution
The proposed security inspection equipment employs a combination of forescatter, backscatter, and transmission detectors with a ray emitter capable of emitting fan and flying spot beams, utilizing a space modulator and adjustable detector modules to reduce detection dead angles and enable simultaneous detection of high-density and low-density substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If X-ray transmission equipment is used for security inspection, then the structure is simple and operation is easy, but it is difficult to detect low-density substances such as explosives and drugs
Solution Approach 1:
The patent combines three different detection methods (transmission detection, backscatter detection, and forescatter detection) into a single integrated security inspection system. This merging allows the system to leverage the advantages of each method: transmission detection for simple operation, backscatter detection for identifying low-density substances, and forescatter detection for observing internal information on both sides of inspected items, thereby resolving the contradiction between structural simplicity and detection precision.
Solution Approach 2:
The security inspection equipment is designed with multi-functional detection capabilities by incorporating multiple detector types that can operate simultaneously or independently. The system can detect both high-density and low-density substances, observe internal structures from multiple angles, and provides comprehensive inspection results, making it universally applicable to various inspection scenarios while maintaining operational simplicity.
2Measurement precision
If backscatter detection is used to inspect low-density substances, then detection precision for explosives and drugs is improved, but it cannot effectively inspect substances hidden behind metal objects and requires twice inspections for both sides
Solution Approach 1:
The patent merges backscatter detection with forescatter detection in a single integrated system. The forescatter detector is positioned to receive scattered radiation from the front side of the inspected object, enabling observation of internal information on both sides simultaneously. This combination eliminates the need for twice inspections while maintaining the ability to detect low-density substances, thereby reducing inspection process complexity without sacrificing detection precision.
3Measurement precision
If single-sided backscattering imaging is used, then detection of low-density substances is effective, but observation of internal information on the opposite side is poor
Solution Approach 1:
The patent introduces a new detection dimension by positioning the forescatter detector to capture scattered radiation from the front side of the inspected object. This additional detection angle provides complementary information about internal structures on both sides of the object, compensating for the limitations of single-sided backscattering imaging and reducing information loss without affecting the detection capability for low-density substances.
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 configuration enhances detection accuracy and efficiency by optimizing internal information observation on both sides of the inspected item and reducing the need for double inspections, allowing for more reliable and rapid identification of prohibited items.
Implementation Method 1
a X-ray transmission equipment is often utilized for scanning items, in which X-rays emitted from a X-ray source form a scanning sector through a collimator
Implementation Method 2
X-ray backscattering technique can well inspect substances with a low density... the backscatter detector collects the X-ray backscattered rays
Implementation Method 3
a transmission detector located on an opposite side of the object to be detected relative to the ray emitter
Data Source
AI summary
The present disclosure proposes a security inspection equipment and a radiation detection method, and relates to the field of security inspection. The security inspection equipment according to the present disclosure includes: a ray emitter; and a radiation detector comprising a forescatter detector, the forescatter detector and the ray emitter located on opposite sides of an object to be detected; wherein the radiation detector further comprises at least one of the following detectors: a backscatter detector located between the ray emitter and the object to be detected; or a transmission detector wherein the transmission detector and the ray emitter located on opposite sides of an object to be detected. Such a security inspection equipment has a forescatter detector, which can be used in combination with backscatter detector, to reduce detection dead angles.