RFID Tag Visual Tactile Alarm Indicators
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Solution Overview
Problem
Current visual and electronic time-temperature indicators for perishable goods are often inaccurate, prone to tampering, and require an RFID interrogator for data retrieval, leading to inefficient monitoring and potential spoilage in supply chain operations.
Innovation Solution
A Radio Frequency Identification (RFID) tag with a controller that sets an alarm state for predetermined conditions, providing visual, audible, or tactile indicators, which can only be reset by an authorized entity, and includes sensors for detecting environmental or object conditions, ensuring accurate and secure monitoring without the need for continuous power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If visual time-temperature indicators use chemical reactions to provide immediate visual results, then the indication speed is improved, but the accuracy deteriorates because chemical indicators cannot precisely match complex time-temperature degradation profiles
Solution Approach 1:
The patent replaces chemical reaction-based visual indicators with electronic RFID tags that use sensors and microcontrollers to accurately measure and record temperature profiles. This substitution of chemical systems with electronic measurement systems resolves the contradiction by providing both immediate indication capability and high measurement precision through digital sensing and processing.
Solution Approach 2:
The patent introduces an intermediary electronic display component that visually represents temperature data without relying on chemical reactions. The display acts as a mediator between the temperature sensor and the user, providing accurate real-time visual feedback while maintaining measurement precision through electronic rather than chemical means.
2Measurement precision
If RFID tags require an interrogator to read temperature profiles, then measurement precision is improved, but the ease of operation deteriorates because users cannot quickly verify conditions without specialized equipment
Solution Approach 1:
The patent segments the temperature monitoring function into two independent components: an RFID tag with sensor for accurate measurement and a separate visual display component for immediate indication. This segmentation allows the display to provide quick visual feedback without requiring an interrogator, while the RFID tag maintains its precision measurement capability for detailed data retrieval when needed.
Solution Approach 2:
The patent introduces a visual display as an intermediary between the RFID tag and the user. This display provides immediate visual indication of temperature conditions, enabling users to quickly verify status without needing specialized interrogator equipment, while the RFID tag itself retains full measurement precision capabilities.
3Reliability
If visual indicators are placed inside packaging to prevent tampering, then reliability is improved, but the ease of operation deteriorates because the indicators are not visually accessible until the package is opened
Solution Approach 1:
The patent segments the indicator system into an internal RFID tag component (placed inside packaging for security) and an external visual display component (accessible for viewing). This segmentation allows the tag to remain protected while the display provides immediate visual feedback, resolving the contradiction between anti-tampering and accessibility.
Solution Approach 2:
The patent merges the RFID tag and visual display into a single integrated unit that can be placed inside packaging. This combination allows the entire system to be secured within the package while still providing visual indication, as the display does not require external power or complex components that would compromise security.
4Reliability
If chemical time-temperature indicators are set to degrade quickly to ensure safety, then reliability is improved, but productivity deteriorates because good material is inappropriately discarded due to poor indicator accuracy
Solution Approach 1:
The patent replaces conservative chemical indicators with precise electronic temperature sensors and microcontrollers that accurately track actual temperature exposure. This substitution eliminates the need for conservative overestimation, allowing users to confidently accept or reject material based on accurate data, thereby improving material utilization efficiency while maintaining safety.
Solution Approach 2:
The patent implements real-time temperature monitoring and recording with visual feedback that accurately reflects actual thermal exposure. This precise feedback mechanism replaces conservative estimation with actual measurement, enabling users to make informed decisions about material acceptance and reducing unnecessary discards of still-viable material.
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
The RFID tag provides immediate and secure visual or tactile alerts of temperature deviations, ensuring the integrity of perishable goods and reducing unnecessary spoilage by allowing for on-site verification of temperature profiles without the need for an interrogator, while preventing tampering through authorized reset mechanisms.
Implementation Method 1
sensors for detecting environmental or object conditions
Implementation Method 2
RFID systems and methods for providing visual, tactile, and electronic indicators of an alarm condition
Data Source
AI summary
A Radio Frequency Identification (RFID) tag according to one embodiment includes a controller for setting one or more alarm states upon occurrence of one or more alarm conditions, and a visual display device under control of the controller, the visual display device providing a visual, audible, and/or tactile indicator of an alarm condition when an alarm state is set. The visual, audible, and/or tactile indicator of the alarm condition optionally can only be reset by an authorized entity, or cannot be reset.