Coin Identification via Inductive Frequency Analysis

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Solution Overview

Problem

Conventional coin counting devices face difficulties in accurately identifying and sorting coins due to issues like jamming, incomplete detection, and inability to distinguish defective coins, leading to unreliable counting and inefficient change dispensing.

Innovation Solution

A coin identifying method that uses a coin counting device equipped with a coin guider and inductors to determine the type and defectiveness of coins by analyzing frequency changes as they pass through specific inductive points, comparing these changes to reference data to identify normal and defective coins.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional coin counting devices are used, then coin counting function is provided, but reliability of detecting and counting coins cannot be improved due to some coins not being detected

Engineering Contradiction:

Improvereliability of detecting and counting coinsVSAvoiddetection accuracy of coins

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The coin identification process is segmented into multiple detection stages: initial coin detection, frequency measurement during coin passage, and secondary verification. This multi-stage segmentation ensures that coins are detected reliably and reduces missed detections by verifying through multiple measurement points.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Reference frequency data is pre-measured and stored for each coin type before actual coin counting operations. This preliminary action creates a database of expected frequency characteristics that enables rapid and accurate identification during operation, improving both reliability and precision.

Inventive Principle:

Principle #10Preliminary action

2Productivity

If conventional coin sorting methods are used, then coin sorting is performed, but it is not possible to suppress an occurrence of jamming during sorting and counting of coins

Engineering Contradiction:

Improvecoin sorting efficiencyVSAvoidstability of coin sorting operation

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

Coins are identified and classified by type and defect status before the sorting process begins. This preliminary identification ensures that coins are sorted in the correct sequence and that defective coins are separated beforehand, preventing jamming during the sorting operation and maintaining high productivity with improved reliability.

Inventive Principle:

Principle #10Preliminary action

3Quantity of substance

If conventional coin counting devices are used, then coin counting is performed, but it is not possible to discharge defective coins

Engineering Contradiction:

Improvecounting accuracy of coinsVSAvoidability to identify defective coins

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent replaces mechanical inspection methods with electromagnetic induction-based frequency measurement. By measuring changes in inductor frequency as coins pass through, the system can non-contactly identify defective coins based on their electromagnetic properties, enabling accurate detection and separate discharge of defective coins while maintaining counting accuracy.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Adaptability or versatility

If multiple types of coins are input, then various payment options are available, but there is great difficulty in counting the coins

Engineering Contradiction:

Improvepayment method diversityVSAvoidcoin counting speed

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The system replaces slow manual counting with automated electromagnetic frequency measurement. As each coin passes through the inductor, its unique frequency signature is measured and compared against reference data, enabling rapid identification and counting of multiple coin types simultaneously, thus maintaining payment versatility while dramatically improving counting productivity.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 method improves the efficiency and reliability of coin identification by accurately determining the type and defectiveness of coins, reducing jamming and ensuring smooth change dispensing.

Implementation Method 1

a maximum or minimum frequency value output while a coin to be identified, which is input to the coin counting device, passes a first inductor, a maximum or minimum frequency value output while the coin to be identified passes a second inductor

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS12087120B2Method for identifying coin

Publication Date: 2024.09.10 SAITEC INC

AI summary

The present disclosure relates to a method for identifying a coin, and more particularly, to a coin identifying method capable of simultaneously identifying a type of coin and whether the coin is defective. In the coin identifying method of the present disclosure, since the type of coin and whether the coin is defective are simultaneously determined, there is an advantage that efficiency and reliability of identification can be improved.