Coin Validation Oscillator Frequency Amplitude Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing coin validation systems in coin-operated machines, such as parking meters, face challenges in accurately identifying coin denominations due to variations in metallic composition and size, leading to inefficiencies in validation processes.
Innovation Solution
A system utilizing oscillators with coils surrounding the coin passageway to vary frequency and amplitude of oscillations, coupled with a time feature and amplitude determining unit, and an assessing unit that applies linear and rotational transformations to determine if the signal characteristics fall within predetermined windows for each coin denomination, ensuring accurate validation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional coin validation methods are used, then the validation process is simple, but accuracy in identifying coin denominations deteriorates due to variations in metallic composition and size
Solution Approach 1:
The system measures multiple parameters of the coin (mass, diameter, thickness, magnetic properties) simultaneously and uses these parameter variations to accurately identify coin denominations. By analyzing changes in oscillation frequency and amplitude caused by different coin parameters, the system achieves high identification accuracy while accommodating variations in metallic composition and size.
Solution Approach 2:
The patent replaces traditional mechanical coin validation methods with an oscillation-based detection system. Coins are detected by measuring their effect on oscillating elements (such as quartz crystals or magnetic oscillators), substituting mechanical contact and wear-based validation with precise physical measurement of oscillation characteristics, thereby improving accuracy without proportionally increasing complexity.
2Measurement precision
If multiple measurement parameters are used to improve validation accuracy, then identification precision improves, but processing time increases
Solution Approach 1:
The system performs multiple measurements simultaneously rather than sequentially. As the coin passes through the validation zone, all measurement parameters (mass, diameter, thickness, magnetic properties) are captured in continuous real-time during a single pass, eliminating the need for multiple validation steps and reducing processing time while maintaining high accuracy.
Solution Approach 2:
The system pre-establishes reference profiles for different coin denominations and their expected parameter ranges. During validation, measured parameters are immediately compared against these pre-stored references, enabling rapid identification without requiring complex real-time calculations, thus reducing processing time while maintaining accuracy.
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
This approach enables rapid and accurate validation of coins by determining if the signal characteristics align with specific windows, allowing for efficient allocation of denomination values, reducing processing time to approximately 500 μs and minimizing errors across different coin types.
Implementation Method 1
an oscillator having a component positioned relative to the passageway for the frequency and amplitude of oscillation of the oscillator to be varied, in use, by passage of the coin along the passageway
Data Source
AI summary
A system for validating a coin has a passageway through which the coin passes, in use; an oscillator having a component positioned relative to the passageway for the frequency and amplitude of oscillation of the oscillator to be varied, in use, by passage of the coin along the passageway; a period (or frequency) determining unit for determining the period (or frequency) of an oscillating signal provided by the oscillator when influenced by the coin and for supplying a determined period (or frequency) value; an amplitude determining unit for determining the amplitude of the oscillating signal provided by the oscillator when influenced by the coin and for supplying a determined amplitude value; and an assessing unit for assessing if the determined period (or frequency) and amplitude values lie in a predetermined window of period (or frequency) and amplitude values.