Retail Goods Handling Classification Using Energy-Harvesting RFID Tags
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Solution Overview
Problem
Existing RFID tracking systems are inadequate for detecting and distinguishing various types of interactions with goods in retail environments, particularly during customer handling, due to limited energy, range, and operational autonomy, leading to inefficient contamination prevention and unnecessary sanitization measures.
Innovation Solution
A radio frequency micro-device tag with wireless power supply and enhanced antenna design, equipped with sensors, allows for dynamic detection and classification of goods handling, providing additional data beyond basic identification, and activating appropriate management procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RFID tags are used for tracking goods, then identification and tracking capability is improved, but energy supply duration and operational autonomy deteriorate due to limited power from inductive charging
Solution Approach 1:
The system performs preliminary charging of RFID tags when goods are on shelves within range of charging stations. This stored energy is then available for extended periods when goods are removed and taken away from charging range, solving the contradiction between reliable identification and limited energy duration.
Solution Approach 2:
The RFID tags automatically recharge themselves when in range of charging stations without manual intervention. This self-service charging mechanism ensures continuous operational autonomy while maintaining reliable tracking capability throughout the product lifecycle.
2Measurement precision
If RFID readers are positioned close to goods for accurate reading, then measurement precision is improved, but device complexity and installation management worsen due to need for precise positioning in heterogeneous retail environments
Solution Approach 1:
The system transitions from requiring precise horizontal positioning to utilizing vertical dimension - placing readers on overhead structures above shelves. This dimensional change allows readers to cover multiple product types and positions without precise horizontal alignment, reducing installation complexity while maintaining reading accuracy.
Solution Approach 2:
The RFID readers are designed with omnidirectional or wide-angle antennas that can detect and read multiple types of goods simultaneously from a single position. This multi-functionality eliminates the need for specialized positioning for each product type, simplifying installation while preserving measurement precision.
3Ease of manufacture
If barcode systems are used for tracking, then ease of manufacture and implementation is improved, but reliability deteriorates due to code damage, detachment, and illegibility during goods manipulation
Solution Approach 1:
The system replaces mechanical barcode labels with electronic RFID tags that have no moving parts or vulnerable surfaces. This substitution eliminates the problems of code damage, detachment, and illegibility while maintaining ease of implementation through simple tag attachment to goods.
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
Enables accurate detection and classification of goods handling, allowing targeted interventions such as disinfection or reordering, reducing unnecessary sanitization and improving contamination prevention.
Implementation Method 1
The RFID technique or RFID tag (referring to the marker that implements said technology) works according to an inductive principle: in an RFID system, a reader generates an electromagnetic field at a predetermined frequency; when an RFID tag, which can usually be classified as read-only or read/write, enters the electromagnetic field generated by the reader a small electric current is formed in the so-called resonant circuit of said RFID tag
Data Source
AI summary
This patent concerns a system for tracking and identifying goods at points of sale. Particularly it concerns a physical system and a method that can be conveniently used to recognize whether the goods displayed at a point of sale have been manipulated and if so identify with good approximation by means of an expert system the possible type of manipulation that has occurred. That system allows, thanks to this evaluation, to activate, where appropriate, management and control procedures appropriate to the identified event. These procedures include, by way of example, actions to combat possible biological contamination of the goods but also to plan regular reordering, re-packaging, cleansing, fragrance or care of the goods displayed at the point of sale. The proposed system obtains these aforementioned objectives through a new identification tag that can be used to detect the possible removal of the goods from its usual point of display in a point of sale through the acquisition and analysis of various significant parameters (distance, duration, environmental conditions, etc.). This usual point (shelf, display, cabinet and the like) being equipped with a reader that analyzes the data of the tag and classifies them through an expert system aimed at identifying situations of possible handling of the goods. Said tag not using batteries but being recharged wirelessly by said reader during the normal parking of the goods at the point of exposure. That system of tracing and identifying goods at points of sale by being used to detect and classify the handling of goods normally placed on the exhibition facilities (21), (22) of a point of sale; that classification being obtained through a reader (2) installed on those display structures (21), (22); said reader (2) being equipped with an expert system (3) that processes the data provided by a tag (1) applied on said goods; that tag (1) being provided with a said tag (1) includes an energy harvesting circuit (12) and being used to track the movement of those goods when they move away from that reader (2).