RFID Cargo Weight Verification for Container Security
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Solution Overview
Problem
Current container security systems, such as weigh station and Automatic Vehicle Identification programs, lack the capability to effectively identify at-risk containers, particularly when trucks enter the U.S. through ports of entry, failing to account for unidentified or improperly tagged materials that may pose security risks.
Innovation Solution
Integration of RFID functions with monitoring systems and on-board transponders to poll and verify the weight information of cargo containers in transit, comparing estimated payload weight from RFID tags with measured weights to determine a risk profile, allowing vehicles with discrepancies to be flagged for inspection and potentially reclassified as low-risk after physical verification and tagging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If weigh station and Automatic Vehicle Identification systems are used to monitor cargo containers, then vehicle identification and basic weight checking is improved, but the ability to identify at-risk containers with unidentified or improperly tagged materials remains insufficient
Solution Approach 1:
The patent introduces RFID tags as an intermediary element attached to individual cargo items within containers. These tags serve as mediators between the cargo itself and the monitoring system, enabling automatic identification and weight verification without requiring complex manual inspection procedures at weigh stations
Solution Approach 2:
The patent replaces traditional mechanical weight measurement systems at weigh stations with an electronic RFID-based weight verification system. The RFID tags store weight information that can be automatically read and verified against scale measurements, eliminating the need for complex mechanical weighing infrastructure while improving detection capability
2Reliability
If all vehicles undergo routine weight station inspection, then security checking is improved, but processing time and productivity are reduced
Solution Approach 1:
The patent implements preliminary RFID tagging of cargo items before they are loaded into containers. This preliminary action ensures that weight and identification information is already captured and stored in the RFID tags, allowing for rapid verification at weigh stations without requiring time-consuming manual inventory or weighing procedures
Solution Approach 2:
The patent establishes a feedback mechanism where RFID readers at weigh stations automatically read tag information, compare it with scale measurements, and provide immediate feedback on whether the container passes security checks. This automated feedback loop enables rapid decision-making about whether vehicles need full inspection or can proceed quickly
3Measurement precision
If RFID readers poll cargo for weight information continuously, then weight verification accuracy is improved, but energy consumption and system complexity increase
Solution Approach 1:
The patent implements periodic polling of RFID tags rather than continuous monitoring. The RFID reader polls cargo for ID number and weight information at specific intervals or at key events such as when the vehicle approaches the weigh station or during routine stops. This periodic action maintains measurement precision while significantly reducing energy consumption compared to continuous monitoring
Data Source
AI summary
A system and method for establishing a weight related risk profile using RFID technology is provided. While the cargo container is in transit, a RFID reader inside a cargo container polls the contents of the container by reading RFID data from each RFID tagged item and calculate the payload weight. When the truck transporting the cargo container passes a weigh station, or a high-speed scale embedded in the road, a payload weight is measured by a scale. A risk factor is assessed by comparing the estimated weight by the RFID reader with the measured weight by the scale. According to one aspect of the invention, the RFID based polling system has the ability to map the weight and location for each tagged item and estimate a container weight distribution. The estimated weight distribution is compared with the weight distribution measured by the scale to determine potential anomalies.