Coin Identification Coil System for High-Speed Authentication
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Solution Overview
Problem
Existing medal detection devices in slot machines face challenges in identifying coins at high speeds, especially when multiple coins pass through continuously due to friction resistance in the transfer path, leading to inefficiencies in authentication and condition assessment.
Innovation Solution
A device with a passage path containing an exciting coil and a detection coil wound around a core body, where the signal level of the coil output is used to identify coins based on their authenticity and condition, with thresholds set to differentiate between various types of coins, allowing for simplified data handling and rapid identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional optical sensors and capacitance sensors are used to detect coins, then coin authentication can be performed, but the identification speed decreases when multiple coins pass through continuously
Solution Approach 1:
The patent replaces conventional optical sensors and capacitance sensors with a magnetic field-based detection system using exciting coils and detection coils. This substitution enables non-contact, high-speed detection of coin properties (outer diameter, thickness, electrical resistivity) through magnetic flux changes, significantly increasing identification speed while maintaining authentication accuracy even when multiple coins pass through continuously
Solution Approach 2:
The patent changes the detection parameter from optical/capacitance measurements to magnetic field measurements. By measuring changes in magnetic flux caused by coins with different physical properties (outer diameter, thickness, electrical resistivity), the system achieves faster identification speed. The control unit calculates these parameters from the coil output signal levels, enabling high-speed processing without sacrificing authentication capability
2Measurement precision
If detailed signal analysis is performed on each coin, then authentication accuracy is maintained, but data processing complexity increases
Solution Approach 1:
The patent extracts only the essential coin parameters (outer diameter, thickness, electrical resistivity) from the coil output signal, discarding redundant information. The control unit calculates these three key parameters from the signal level changes and compares them against stored reference values, achieving accurate authentication with simplified processing logic rather than performing complex detailed signal analysis on the entire waveform
Solution Approach 2:
The patent applies different processing strategies to different aspects of coin detection. The exciting coil generates a magnetic field that interacts with the coin's physical properties, while the detection coil measures the resulting flux changes. The control unit then applies localized processing by comparing specific calculated parameters (outer diameter, thickness, electrical resistivity) against reference values, achieving accurate authentication without requiring complex processing of the entire signal
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
Enables high-speed identification of coins by reducing data processing complexity and accurately distinguishing between different coin types, even when multiple coins pass through continuously, improving the efficiency of the authentication process.
Implementation Method 1
an exciting coil and a detection coil; a core body around which the exciting coil and the detection coil are wound
Implementation Method 2
a signal level of the coil output signal rising if the identification object passes through the passage path
Data Source
AI summary
A device for identifying an object to identify may include a passage through which the object passes; an exciting coil and a detection coil; a core body around which the exciting coil and the detection coil are wound; and a control unit to which the detection coil is connected. The core body may include a first core and a second core. An analog coil output signal may be input into the control unit, a signal level of the coil output signal rising if the identification object passes through the passage path. The control unit may obtain a signal value of the coil output signal and identify the object.