Security Pulse Generator for Fuel Dispenser Fraud Detection
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Solution Overview
Problem
Fuel dispensers face inaccuracies and frauds due to modifications in measuring software, pulse signal interference, and component failures, leading to ineffective prevention of oil theft and leakage.
Innovation Solution
A security pulse generator for fuel dispensers, comprising a pulse signal generating component, encoding microprocessor, and measuring microprocessor, which generates and encodes pulse signals, and compares decoded and received pulse numbers to detect fraudulent activities, using photoelectric or electromagnetic methods with magnetic field encoding for enhanced accuracy and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional pulse signal transmission is used in fuel dispensers, then the device complexity is low, but the measurement precision deteriorates due to fraud and interference
Solution Approach 1:
The patent implements a nested verification structure where an encoding microprocessor embeds encoded pulse signals within the transmission channel, and a measuring microprocessor decodes and verifies these signals. This nested approach allows fraud detection capabilities to be integrated within the existing pulse transmission system without requiring a complete system redesign, thereby improving measurement accuracy while controlling device complexity.
Solution Approach 2:
The patent introduces an encoding microprocessor as an intermediary component between the pulse signal source and the measuring system. This intermediary encodes the pulse signals with verification information, enabling fraud detection without directly modifying the core measurement process. The intermediary approach allows the system to maintain low complexity while achieving high measurement precision through the added verification layer.
2Reliability
If fraud detection mechanisms are added to fuel dispensers, then the reliability improves, but the device complexity increases
Solution Approach 1:
The patent segments the fraud detection function into separate encoding and measuring microprocessors, each handling specific aspects of verification. The encoding microprocessor handles signal encoding and initial verification, while the measuring microprocessor handles decoding and final validation. This segmentation allows reliability to be improved through distributed verification logic without requiring a single complex fraud detection system, thereby controlling overall device complexity.
Solution Approach 2:
The patent implements feedback mechanisms where the encoding microprocessor provides encoded verification signals back into the transmission channel, and the measuring microprocessor uses these feedback signals to validate the authenticity of pulse counts. This feedback approach enhances reliability by creating a closed-loop verification system that can detect and prevent fraud, while the feedback is integrated into the existing signal flow rather than requiring separate complex monitoring systems.
3Measurement precision
If pulse signal encoding is implemented, then the measurement precision improves, but the ease of operation deteriorates
Solution Approach 1:
The patent implements self-service verification where the encoding microprocessor automatically encodes pulse signals with verification information, and the measuring microprocessor automatically decodes and validates these signals without requiring manual intervention. This self-service approach maintains measurement precision through automated encoding/decoding while preserving ease of operation by eliminating the need for operators to manually verify pulse counts or understand complex verification procedures. The system handles all verification tasks autonomously.
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
Effectively prevents fraud and leakage by accurately comparing pulse numbers, providing smaller, more stable, and environment-independent solutions with multiple operating modes, ensuring secure fuel dispensing.
Implementation Method 1
The rotating circle number of the optical grating encoder is proportional to the flow volume
Implementation Method 2
The rotating circle number of the magnetic field generator part is proportional to the flow volume
Implementation Method 3
a programmable magnetic rotary encoding chip, which inducts the magnetic field distribution of said magnetic steel body to transmit two circuit output pulse signals after it is processed and converted
Data Source
AI summary
A security pulse generator and methods thereof are applied in fuel dispensers. The fuel dispenser includes a flow measuring transducer and a control main board on which there is a measuring microprocessor on the control main board. The security pulse generator includes: a pulse signal generating component, which generates a corresponding pulse signal according to the rotation of the flow measuring transducer; an encoding microprocessor, which receives and transduces the pulse signal, transmits it to the control main board, and meanwhile encodes the output pulse signal; a measuring microprocessor, which receives and decodes output pulse number encoded data from the encoding microprocessor and transforms it to the output pulse number after decoding it, then compares it to the pulse number of the control main board to determine if there is suspecting frauds in the fueling process.