Multi-Mode Security Scanners for Fast Anomaly Characterization
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Solution Overview
Problem
Scanners at checkpoints often generate false alarms and require manual intervention for anomalies that they cannot automatically classify, leading to inefficiencies and increased staffing needs.
Innovation Solution
A method and apparatus using multiple scan modes, including a first mode scan for initial anomaly detection and a second mode scan, such as X-ray diffraction, to refine anomaly characterization by obtaining orthogonal information, and a controller to iteratively adjust scanning strategies to differentiate between security risks and non-risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single scan mode is used for initial anomaly detection, then scanning speed is improved, but measurement precision of anomaly characterization deteriorates
Solution Approach 1:
The scanning process is divided into two distinct modes: a first scan mode for rapid initial anomaly detection and a second scan mode for detailed anomaly characterization. The controller segments the scanning task by first performing a quick scan to identify potential anomalies, then selectively performing a second detailed scan only on items containing anomalies, thereby achieving both high scanning speed and precise anomaly characterization.
Solution Approach 2:
The first scan mode performs preliminary anomaly detection before the second scan mode characterizes the anomaly in detail. By conducting the rapid initial scan first, the system prepares by identifying which items require further detailed scanning, thus optimizing the overall process efficiency and precision.
2Measurement precision
If multiple scan modes are used for all items, then measurement precision of anomaly characterization is improved, but productivity deteriorates
Solution Approach 1:
The system segments the population of scanned items into two groups: items containing anomalies (identified by the first scan mode) and items without anomalies. The detailed second scan mode is applied only to the anomaly-containing subset, while the majority of items are processed quickly by the first scan mode alone, thus maintaining high productivity while achieving precise characterization where needed.
Solution Approach 2:
Instead of applying the resource-intensive second scan mode to all items, the system applies it partially only to items where it is necessary (those containing anomalies). This partial action approach maintains productivity by avoiding unnecessary detailed scans on clear items while still achieving precise anomaly characterization when required.
3Reliability
If scanners trigger alarms for all detected anomalies, then reliability of security screening is improved, but loss of time increases due to manual intervention
Solution Approach 1:
The scanner system performs self-service by automatically characterizing anomalies using the second scan mode and controller analysis. The system autonomously determines whether detected anomalies represent actual security threats or false alarms, reducing the need for manual staff intervention and thereby decreasing loss of time while maintaining reliable security screening.
Solution Approach 2:
The system uses feedback from the first scan mode results to control the second scan mode operation. The controller analyzes the initial anomaly detection data and automatically triggers detailed scanning and characterization only when necessary, creating a closed-loop system that reduces false alarms and minimizes manual intervention time while maintaining high reliability.
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
Enhances the efficiency of security screening by reducing false alarms and minimizing manual intervention through iterative refinement of anomaly characterization using multiple scan modes and strategic alignment of scanners.
Implementation Method 1
obtaining, by an emitter and a sensor of a scanner, information representing a first mode scan of an item
Implementation Method 2
interposing, according to the strategy, at least one diffraction grating in a beam path of the scanner
Implementation Method 3
interposing, according to the strategy, at least one diffraction grating in a beam path of the scanner
Implementation Method 4
obtaining, by the emitter and the sensor of the scanner according to the strategy, other information representing a second mode scan of the area of interest while using the at least one diffraction grating
Data Source
AI summary
An example method to characterize an anomaly includes obtaining information about an item using a first mode scan and detecting whether the item contains an anomaly based on the information. The method further includes determining, responsive to detecting the anomaly, an area of interest of the item corresponding to a location of the anomaly, and determining a strategy including a procedure to obtain other information of the area of interest. The method refines a characterization of the anomaly based on the other information, and compares the characterization of the anomaly to a predetermined criterion. The method iteratively revises the strategy to perform additional available procedures, to further refine the characterization of the anomaly. When the characterization of the anomaly meets the predetermined criterion corresponding to a prohibited item, the method identifies the anomaly as prohibited.