Smart RFID Label for Shelf-Life Monitoring in Metal Containers
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Solution Overview
Problem
Existing technologies for monitoring perishable products lack effective solutions for communicating shelf-life data beyond RF capabilities, especially in situations where RF readers are not present or perform poorly, and fail to provide reliable temperature monitoring within metal-lined containers.
Innovation Solution
The integration of digital sensing with RFID technology, incorporating visual and audio communication interfaces, such as LEDs and audio signals, to monitor and report shelf-life data, along with a smart label design that allows the sensor module to be inside a package while the antenna remains outside, enhancing RF reception and battery longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If RF technology is used for communicating shelf-life data, then data transmission capability is improved, but communication reliability deteriorates when RF readers are not present or perform poorly
Solution Approach 1:
The patent introduces visual (LED) and audio indicators as intermediary communication channels between the sensor module and the user. When RF communication is unavailable or unreliable, these intermediaries provide alternative pathways for transmitting shelf-life data, thereby resolving the contradiction between data transmission capability and communication reliability.
Solution Approach 2:
The sensor module is designed with multi-functionality, capable of communicating through multiple channels: RF transponder for standard communication, LED visual indicators for alternative communication, and audio signals for yet another alternative. This universal communication approach ensures that shelf-life data can be transmitted reliably regardless of RF reader availability, resolving the reliability issue while maintaining data transmission capability.
2Adaptability or versatility
If sensor module is placed inside a package for monitoring, then product integration is improved, but RF reception deteriorates due to metal-lined containers
Solution Approach 1:
The patent uses visual LED indicators and audio signals as intermediary communication devices that do not rely on RF transmission. The sensor module can be placed inside the metal-lined container for optimal product integration, while these intermediaries provide a reliable communication pathway that bypasses the RF blocking effect of metal containers, thus resolving the contradiction between integration and reception reliability.
Solution Approach 2:
The system segments the communication function into multiple independent channels: RF transponder for wireless communication when available, LED visual indicators for line-of-sight communication, and audio signals for acoustic communication. This segmentation allows the sensor module to be optimally positioned inside the package for monitoring while using alternative segments (LED/audio) that are not affected by metal container interference.
3Measurement precision
If battery is placed inside a cold container for temperature monitoring, then monitoring accuracy is improved, but battery life deteriorates due to cold conditions
Solution Approach 1:
The patent segments the temperature monitoring function from the power supply function. The sensor module that performs temperature monitoring remains inside the cold container for accurate measurements, while the battery is relocated outside the container in a warmer environment. This segmentation allows the monitoring function to maintain precision while the power supply function operates in more favorable thermal conditions, extending battery life.
Solution Approach 2:
The patent introduces visual LED indicators and audio signals as intermediaries for communicating temperature monitoring data. This allows the sensor module to remain inside the cold container for accurate monitoring while the battery can be positioned outside. The intermediaries transmit the monitoring data without requiring the battery to be inside the cold environment, thus resolving the contradiction between monitoring accuracy and battery life.
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 reliable communication of shelf-life data through alternative interfaces when RF is unavailable, maintains battery power in cold conditions, and optimizes RF performance in metal-lined containers, ensuring accurate temperature monitoring and extended battery life.
Implementation Method 1
The indicator may include a LED, OLED, LCD, light or other visual, audio or otherwise humanly perceivable sensory indicator
Implementation Method 2
a sensor may use different types of audio sounds signal to shelf-life status, product information and alerts
Implementation Method 3
The sensor is adapted to operate with an RFID device including an antenna for receiving signals from an RF reader
Data Source
AI summary
A condition monitoring system includes a radio frequency transponder module including an RFID chip having a first memory, and an antenna; at least one sensor module that monitors data related to the condition of a product and includes a second memory for storing the monitored data; and a communication interface that couples the at least one sensor module to the RFID chip of the radio frequency transponder module so that the sensor module is operative to communicate with the RFID chip by way of the communication interface and the RFID chip first memory is operative to store data related to the product.