Tamper-Evident Cargo Seal Bolt Lock with RFID Timestamping
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Solution Overview
Problem
Conventional bolt locks on shipping containers lack evidence of tampering, leading to disputes over liability when theft occurs, as they cannot record or prove when the lock was accessed, making it difficult to determine the responsible party.
Innovation Solution
A tamper-evident cargo container seal bolt lock system that includes a conductive bolt member and a receiving member with a sensory circuit and RFID transponder, which records the date and time of any interruption, allowing for the transmission of this information in case of a dispute.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a conventional bolt lock is used on a shipping container, then the lock provides basic security and is simple in structure, but it cannot provide evidence of tampering or record when the lock was accessed
Solution Approach 1:
The patent combines a conventional bolt lock with electronic components including a sensory circuit, microcontroller, RFID transponder, and conductive medium to create an intelligent lock system that records and transmits tampering information, thereby merging mechanical security with electronic evidence tracking
Solution Approach 2:
The conductive medium embedded in the encapsulant serves as an intermediary that provides electrical connectivity between the sensory circuit and the RFID transponder, enabling the transmission of tampering data without adding complex wiring
2Reliability
If a bolt lock is designed to be simple and easy to manufacture, then production costs are low, but it cannot detect or record tampering events during transit
Solution Approach 1:
The bolt lock is designed to perform multiple functions: mechanical locking, tamper detection via sensory circuit, data recording in memory, and wireless transmission through RFID, making it a multi-functional device that enhances reliability while maintaining manufacturing feasibility
Solution Approach 2:
The encapsulant is molded as a thin flexible shell that contains and protects the electronic components while maintaining a compact structure, making the assembly process simpler and more reliable
3Measurement precision
If visual inspection of the container and lock is performed, then basic security checks can be made, but no clear evidence is provided as to when or where theft occurred
Solution Approach 1:
The sensory circuit continuously monitors the integrity of the conductive pathway and provides immediate feedback when tampering occurs, recording the precise time and transmitting the alert via RFID, thereby enabling precise measurement of tampering events
Solution Approach 2:
The patent replaces manual visual inspection with an automated electronic detection system that uses electrical conductivity monitoring and RFID technology to automatically detect, record, and communicate tampering events, eliminating the limitations of human inspection
4Loss of information
If a one-time use bolt lock is used that must be cut open to access contents, then security is maintained, but disputes arise over liability when theft occurs since the lock provides no timing information
Solution Approach 1:
The lock system performs preliminary actions by continuously monitoring the conductive pathway and recording the time of any tampering event in memory before the container reaches its destination, ensuring that evidence is captured and preserved for later dispute resolution
Solution Approach 2:
The RFID transponder creates a digital copy of the tampering event data including timestamp and can transmit this information wirelessly, providing a replicable record of the theft event that can be verified by multiple parties
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 clear evidence of when the lock was tampered with, facilitating the determination of liability and reducing legal disputes by enabling immediate detection and documentation of theft during transit.
Implementation Method 1
an electrically conductive pathway is formed from the conductive medium, through at least a portion of the bolt member and at least a portion of the receiving member
Implementation Method 2
a sensory circuit adapted to electrically interface with the conductive medium so as to detect whether the circuit has been interrupted
Implementation Method 3
an RFID transponder adapted to transmit the recorded date and/or time
Data Source
AI summary
Systems and methods for a tamper-evident cargo container seal bolt lock are disclosed herein. The device can include a receiving member, a conductive bolt member adapted to be snap-locked into the receiving member, and a plastic encapsulant which tethers the bolt member to the receiving member. The encapsulant can contain an electrically conductive medium, such as a wire, which runs from the receiving member to the second end of the bolt. A sensory circuit disposed within the receiving member can be configured to sense whether the circuit has been interrupted (e.g., if the bolt has been cut). In the event of an interruption, the circuit can record the present time and/or date in memory. An RFID transponder disposed within the encapsulant or the receiving member can then transmit the recorded date/time to an RFID interrogator if a dispute subsequently arises as to when the lock had been broken.