RFID Reading Device With Vertical Antenna Segmentation
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Solution Overview
Problem
Existing self-checkout systems face difficulties in efficiently reading information from RFID tags attached to commodities, particularly when commodities are overlapping or arranged in a way that hinders effective radio wave transmission, leading to cumbersome operator intervention to identify and separate unread commodities.
Innovation Solution
A reading device equipped with multiple antennas at different vertical locations, a specifying unit, a selection unit, and a guide unit to identify and instruct the movement of commodities based on read information, deducing overlapping relationships and providing guide information to facilitate efficient selection and separation of commodities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single antenna is used for reading RFID tags, then the device complexity is low, but the reading reliability deteriorates when commodities overlap or are arranged in complex patterns
Solution Approach 1:
The reading device is divided into multiple independent antenna units (first antenna and second antenna) positioned at different vertical locations. Each antenna can independently read RFID tags, allowing the system to segment the reading task across multiple spatial positions to overcome overlapping commodity arrangements.
Solution Approach 2:
The patent introduces a vertical dimension by positioning antennas at different heights (first antenna below the table surface, second antenna above the table surface). This dimensional change allows radio waves to penetrate through commodities from opposite directions, resolving reading failures caused by horizontal overlapping arrangements.
2Ease of operation
If commodities are placed in a shopping basket for checkout, then the ease of operation is improved, but the reading precision deteriorates due to overlapping and unknown arrangement states
Solution Approach 1:
By adding vertical positioning of antennas (below and above the table), the system can read RFID tags from multiple vertical perspectives. This dimensional approach allows reading through shopping baskets even when commodities are densely packed or in unknown arrangements, as radio waves can penetrate from opposite vertical directions.
Solution Approach 2:
The system uses the reading results from multiple antennas to determine which commodities have been successfully read. Based on this feedback, the guide unit provides targeted guidance to operators about which specific commodities need to be moved, creating a closed-loop system that improves reading precision through iterative correction.
3Productivity
If operator guidance is provided for moving commodities, then the productivity is improved, but the device complexity increases due to additional guiding components
Solution Approach 1:
The system automatically identifies which commodities cannot be read and generates guidance information without requiring manual operator intervention for identification. The guide unit self-services by providing clear instructions on which commodities to move, reducing the cognitive load and time required for operators while maintaining system simplicity.
4Reliability
If multiple antennas at different vertical locations are used, then the reading reliability is improved for overlapping commodities, but the device complexity increases
Solution Approach 1:
The reading function is segmented into multiple independent antenna units positioned at different vertical locations. Each antenna operates independently to read RFID tags, allowing the system to divide the reading task across spatial segments to overcome the limitations of single-point reading in complex commodity arrangements.
Solution Approach 2:
The patent adds vertical spatial distribution of antennas (first antenna below table surface, second antenna above table surface) to create multi-directional reading capability. This dimensional approach allows radio waves to penetrate commodities from opposite vertical directions, resolving reading failures caused by horizontal overlapping while maintaining relatively simple antenna structures.
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
Enhances the operability of self-checkout processes by accurately identifying and guiding the movement of commodities, reducing operator effort and improving the efficiency of reading operations even in complex arrangements.
Implementation Method 1
two or more antennas arranged at different vertical locations with respect to a table having a placing region for receiving a commodity, and configured to transmit radio waves and communicate with an RFID (Radio Frequency IDentifier) tag
Data Source
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AI summary
According to one embodiment, a reading device reads inherent information of a commodity from an attached RFID tag. The device includes antennas arranged at different vertical locations with respect to a table having a placing region. The antennas respectively transmit radio waves from different locations to the placing region. A specifying unit of the reading device can specify a commodity in the placing region based on the inherent information read through the antennas. A selection unit of the reading device can select one commodity to be moved from the placing region from commodities specified by the specifying unit if a container in which the commodities are contained is taken in the placing region. A guide unit of the reading device can display guide information for instructing a movement of the commodity selected by the selection unit from the placing region on a display.