Carriage Tag Reader Prevents Cross-Registration via Feedback
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Solution Overview
Problem
Rolling carriages, such as shopping carts, often inadvertently read wireless tags from nearby items due to proximity, leading to erroneous registration of items when using tag reading devices.
Innovation Solution
An article input system with a terminal device on each carriage that includes a processor to read and register unique identification information from wireless tags, and a communication mechanism to verify if the tag is already registered on another nearby carriage, preventing incorrect registration by displaying a warning or not registering the item if it is already registered elsewhere.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a tag reading device is installed on the carriage to read wireless tags from items, then item registration capability is improved, but erroneous registration occurs when carriages pass near each other due to inadvertent reading of tags from other carriages
Solution Approach 1:
The system establishes communication between terminal devices on different carriages to exchange information about registered items. When one carriage reads a wireless tag, it notifies other nearby carriages, which then check if they have also read the same tag. This feedback mechanism allows the system to detect and prevent erroneous registrations caused by inadvertent reading of tags from other carriages.
Solution Approach 2:
The terminal device acts as an intermediary between the reading unit and the registration process. It receives read information from the reading unit, communicates with other terminal devices to verify whether the read item belongs to the current carriage or another carriage, and then determines whether to register the item. This intermediary function prevents direct erroneous registration by filtering out items that belong to other carriages.
2Area of stationary object
If the tag reading range is increased to improve reading coverage, then more items can be read, but the likelihood of inadvertently reading tags from other carriages increases
Solution Approach 1:
By maintaining communication between terminal devices on different carriages, the system receives feedback about items read by other carriages. This allows the reading unit to have an extended reading range while the system can identify and exclude items that belong to other carriages based on the feedback information received from other terminal devices.
Data Source
AI summary
An article input device includes a processor. The processor acquires identification information read from a wireless tag by a reading unit installed in a first carrier carrying an article. The processor registers the acquired identification information in a first list when the acquired identification information is not registered in a second list in which identification information read from a wireless tag by a second reading unit installed in a second carrier carrying an article is registered. The processor causes a display on the first carrier to output a notification when the acquired identification information is registered in the second list.