Fuel Dispenser Flow Meter Fraud Detection via Transponder Verification
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Solution Overview
Problem
Fuel dispensers face fraud and tampering issues due to interference with displacement sensors, which affect the accuracy of fuel volume measurement, leading to potential overcharging or undercharging of customers.
Innovation Solution
The implementation of a system using transponders and interrogator electronics for wireless communication between the fuel flow meter and displacement sensor, enabling remote electronic verification and preventing unauthorized tampering by ensuring the correct coupling of the displacement sensor with the flow meter before fueling transactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical locks and pins are used to prevent detachment of the displacement sensor, then the security of the sensor connection is improved, but the device complexity increases
Solution Approach 1:
The patent replaces mechanical locking systems (locks, pins, and enclosures) with an electronic verification system. The displacement sensor includes an electronic identifier that communicates with the flow meter through wireless or wired electronic coupling, allowing the system to verify sensor presence and authenticity without mechanical restraints. This eliminates complex mechanical components while maintaining security through electronic authentication.
Solution Approach 2:
The patent introduces an electronic intermediary system consisting of identifiers, verifiers, and communication circuits that mediate between the displacement sensor and flow meter. This electronic intermediary replaces the need for direct mechanical coupling and locking mechanisms, enabling secure connection verification through electronic signals rather than physical restraints.
2Ease of operation
If the displacement sensor is made detachable for ease of installation, then the ease of operation is improved, but the vulnerability to fraud increases
Solution Approach 1:
The patent implements a feedback verification system where the flow meter continuously monitors the presence and validity of the displacement sensor through electronic communication. The verifier in the flow meter receives signals from the sensor's identifier and provides feedback to the control system. This feedback mechanism allows the system to detect when a sensor is detached or tampered with, enabling real-time fraud prevention while maintaining installation flexibility.
Solution Approach 2:
The patent employs preliminary verification actions before allowing fuel dispensing operations. The system performs preliminary checks to verify that the displacement sensor is properly coupled and authenticated before initiating any fuel transaction. This preliminary verification prevents fraud by ensuring the sensor's integrity is established beforehand, while still allowing easy installation and removal of the sensor component.
3Reliability
If electronic verification systems are implemented to prevent fraud, then the reliability of fuel measurement is improved, but the device complexity increases
Solution Approach 1:
The patent designs the electronic verification system to serve multiple functions simultaneously. The identifier and verifier components not only authenticate the sensor's legitimacy but also establish the electronic coupling between sensor and flow meter, and provide continuous monitoring during operation. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in device complexity while maintaining high reliability.
Data Source
AI summary
A method of conducting a fueling transaction at a fuel dispenser. The fuel dispenser includes a flow meter operatively connected to internal fuel flow piping. The method comprises the step of providing a displacement sensor for generating information representative of an amount of fuel delivered through the flow meter. The displacement sensor comprises at least one transponder operatively connected to the flow meter. The method also comprises providing at least one interrogator electronics configured for remote electronic communication with the at least one transponder and authorizing the fueling transaction. Finally, the method comprises communicating with the at least one transponder using the at least one interrogator electronics during the fueling transaction. Fuel dispensers and flow meter assemblies comprising displacement sensors having transponders and/or capacitive sensing elements are also disclosed.