Smart Food Tray Logging for Accurate Buffet Checkout Weighing
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Solution Overview
Problem
Buffet-style establishments face issues with inaccurate billing due to customers mixing different food items on the same plate, leading to overpayment or underpayment, and the current weighing process is time-consuming and prone to food spillage.
Innovation Solution
Implementing smart food stations and user trays equipped with RFID transceivers and electronic scales that accurately measure and log the weight and type of food items, allowing for automated transaction data collection and processing at checkout.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If customers mix different food items on the same plate, then the checkout process becomes simpler and faster, but billing accuracy deteriorates leading to overpayment or underpayment
Solution Approach 1:
The system segments the billing process by assigning a unique RFID tag to each food item container. When items are transferred to the customer's plate, the RFID reader detects the transfer and automatically records the weight and type of each item separately. This segmentation allows multiple items on one plate to be individually tracked and billed accurately, resolving the contradiction between simplified checkout and billing precision.
2Measurement precision
If individual plates are weighed at checkout, then billing accuracy is maintained, but the process becomes time-consuming and prone to food spillage
Solution Approach 1:
The system performs weight measurement in advance during the food transfer process itself. As each item is moved from the serving station to the customer's plate, the RFID reader and scale immediately record the weight. This preliminary action eliminates the need for separate weighing at checkout, maintaining measurement accuracy while significantly reducing checkout time and preventing food spillage.
3Measurement precision
If multiple food items are tracked individually, then billing accuracy improves, but system complexity increases
Solution Approach 1:
The RFID reader is designed as a universal device that performs multiple functions: identifying food items, measuring their weight, tracking transfers, and generating billing information. This multi-functionality allows the system to track multiple food items individually without requiring separate complex devices for each function, thereby maintaining item-level billing accuracy while managing system complexity.
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
Ensures precise billing based on individual food items, reducing errors and time consumption, and streamlining the checkout process by automating weight-based transactions.
Implementation Method 1
detecting, by one or more scale devices, a change in weight of a prepared food item stored at each of the one or more scale devices
Data Source
AI summary
Devices, systems, and methods for weight-based tracking of prepared foods for affecting checkout. The devices, systems, and methods may include detecting, by one or more scale devices, a change in weight of a respective prepared food item stored at each of the one or more scale devices; controlling, by the respective scale device, a first transceiver of the respective scale device to transmit prepared food transaction data to a second transceiver of a user tray; storing, by the user tray, the transmitted prepared food transaction data in a memory slot at the second transceiver of the user tray; repeating the foregoing at each of the one or more scale devices at which a change in weight of a respective prepared food item is detected; and completing, by a transaction processing station, a checkout of the user tray.