Checkout Device Coin Limiting Mechanism
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Solution Overview
Problem
Checkout devices are not designed to handle large amounts of coins or bills in a single transaction, leading to clogging and overflow issues, necessitating limitations on the number of coins or bills that can be deposited, which is inconvenient for store operations and customers.
Innovation Solution
A checkout device with a change machine that counts coins by denomination and a processor to determine if the number of inserted coins exceeds a set threshold, controlling the machine to dispense excess coins and display warnings to the user, thereby limiting the number of coins of the same denomination that can be deposited in a single transaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of coins or bills that can be deposited in a transaction is limited for each denomination, then clogging and overflow are prevented, but it becomes inconvenient for store clerks to perform replenishment operations requiring substantial amounts of coins or bills
Solution Approach 1:
The system dynamically adjusts the coin acceptance limit based on the operational context. When a replenishment operation is detected (through specific input operations or modes), the limit is increased or suspended, allowing substantial amounts of coins to be deposited. For normal customer transactions, the standard limit applies to prevent clogging and overflow. This dynamic adjustment resolves the contradiction by making the limit adaptive rather than fixed.
2Ease of operation
If the change machine is designed to receive a large amount of coins in a single transaction, then replenishment operations become convenient, but clogging and overflow occur during normal customer transactions
Solution Approach 1:
The system employs dynamic limit adjustment based on operational mode. During normal customer transactions, a strict coin limit is enforced to prevent clogging and overflow. When replenishment operations are initiated (detected through specific user actions or system modes), the limit is dynamically increased or removed, enabling convenient deposition of large coin amounts. This resolves the contradiction by making the machine's acceptance capacity adaptive to the operational context.
3Ease of operation
If no limit is imposed on the number of coins deposited, then customer convenience is improved, but the checkout device experiences clogging and overflow
Solution Approach 1:
The system implements a dynamic coin acceptance limit that adjusts based on the transaction type and operational context. For standard customer transactions, a reasonable limit is applied to prevent clogging and overflow while maintaining adequate convenience. The system can dynamically adjust or suspend this limit when detecting replenishment operations or other legitimate scenarios requiring larger coin amounts, thus balancing reliability and ease of operation under different conditions.
Data Source
AI summary
A checkout device includes a change machine into which coins can be inserted and from which coins can be dispensed, the change machine being configured to count a number of inserted coins for each denomination, a memory that stores a first number indicating a total number of coins that can be accepted in a single transaction for each denomination, and a processor configured to: acquire, from the change machine, a number of coins inserted in a transaction for each denomination, determine whether the number of the inserted coins exceeds the first number for each denomination, and upon determining that the number of the inserted coins exceeds the first number for a denomination, control the change machine to dispense a second number of coins of the denomination exceeding the first number.