Echolocation RFID Tag for Container Fill Level Monitoring

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Solution Overview

Problem

Current RFID technologies do not effectively monitor the internal contents or fill level of product containers, leading to inefficiencies in inventory management and increased replacement costs due to delayed restocking of consumable products.

Innovation Solution

A product management system utilizing RFID tags that employ echolocation or weight-sensing capabilities to determine the quantity of products within containers, coupled with an RFID reader and communication device to transmit data for remote processing, allowing for accurate tracking and timely restocking.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If traditional RFID tags are used for inventory tracking, then product identification and basic inventory monitoring are improved, but the ability to monitor internal contents and fill levels deteriorates

Engineering Contradiction:

Improveproduct identification and inventory monitoringVSAvoidinternal contents and fill level monitoring

Core Design Contradiction:

Loss of informationVSMeasurement precision

Solution Approach 1:

The patent combines traditional RFID identification functionality with echolocation measurement capabilities into a single integrated tag system. The RFID tag includes both identification circuitry and echolocation transducers, allowing simultaneous product identification and precise fill level monitoring without requiring separate systems.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The RFID tag is designed to perform multiple functions: product identification, fill level measurement, and internal contents monitoring. This multi-functional approach eliminates the need for separate monitoring devices and provides comprehensive inventory management capabilities within a single tag unit.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Measurement precision

If RFID tags with echolocation capabilities are implemented, then product level monitoring precision is improved, but device complexity increases

Engineering Contradiction:

Improveproduct level monitoringVSAvoidRFID tag structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The echolocation transducers and measurement circuitry are nested within the RFID tag structure itself. The transducers are positioned inside the tag housing, and the measurement electronics are integrated into the tag's circuit board, creating a compact nested arrangement that minimizes overall complexity.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent uses the container walls as an intermediary medium for echolocation measurements. Instead of requiring direct contact with the product contents, the system transmits signals through the container walls, which act as a mediator to convey information about internal fill levels and contents without direct sensor contact.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If continuous monitoring is implemented, then inventory management efficiency is improved, but energy consumption increases

Engineering Contradiction:

Improveinventory management efficiencyVSAvoidRFID tag energy consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The echolocation monitoring operates periodically rather than continuously, triggered by RFID reader interrogations. The tag performs fill level measurements only when prompted by a reader, entering low-power states between measurements, which significantly reduces overall energy consumption while maintaining effective monitoring capability.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system enables automatic restocking notifications and inventory management without continuous human intervention. The RFID tag autonomously monitors its own status and can trigger restocking alerts when fill levels reach thresholds, allowing the inventory system to service itself and reducing the need for active monitoring energy consumption.

Inventive Principle:

Principle #25Self-service

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 precise monitoring of product levels, reducing replacement costs and improving inventory management by providing real-time data for restocking, thus minimizing delays and discomfort associated with depleted inventory.

Implementation Method 1

an echolocation RFID tag for the transmission of radio signals to a product and thereafter receiving return signals due to the reflection of the transmitted radio signals from the product

Methodology Applied

Scientific EffectEcholocation: Echo

Implementation Method 2

a weight-sensing RFID tag which can determine the weight of a quantity of a product

Methodology Applied

Scientific EffectWeight sensing:

Data Source

PatentUS8284056B2Product management system and method of managing product at a location

Publication Date: 2012.10.09 MCTIGUE ANNETTE COTE

AI summary

A system and method of managing product at a location in which an echolocation RFID tag or a weight-sensing RFID tag is utilized to determine the quantity of material in a container and then this information is read by an RFID reader and then transmitted to a data storage repository and processing program for further handling of the data. The data storage repository and processing program may be near the RFID reader or may be remotely located with respect to the RFID reader.