Multi-response Thermochromic Sensor Platform for Temperature Monitoring
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Solution Overview
Problem
Commercially available thermochromic inks can only display one environmental profile related to a single stimulus, requiring multiple indicators for temperature and humidity exposure monitoring, which is costly and complex to implement and interpret.
Innovation Solution
A temperature exposure indicator comprising a mixture of a first and second thermochromic material, exhibiting semi-irreversible color changes to indicate both high and low temperature thresholds in a single indicator, simplifying the monitoring process and improving readability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple separate thermochromic indicators are used to monitor different temperature thresholds, then measurement precision for different temperature exposures is improved, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The patent combines multiple thermochromic materials with different transition temperatures into a single composite indicator layer. This single layer contains both a first thermochromic material for detecting low temperature thresholds and a second thermochromic material for detecting high temperature thresholds, merging the functionality of multiple separate indicators into one unified device.
Solution Approach 2:
The single temperature exposure indicator is designed to perform multiple detection functions simultaneously. It can detect both low temperature excursions and high temperature excursions, as well as provide visual feedback for different temperature ranges, making a single device universal for multiple monitoring purposes that previously required separate specialized indicators.
2Measurement precision
If multiple separate thermochromic indicators are used to monitor different temperature thresholds, then measurement precision for different temperature exposures is improved, but ease of operation deteriorates due to interpretation complexity
Solution Approach 1:
Different regions of the single indicator layer exhibit different color changes based on their local thermochromic material composition. The first thermochromic material region changes color for low temperature detection while the second thermochromic material region changes color for high temperature detection, allowing users to interpret different temperature exposures by observing different local areas of the same indicator.
Solution Approach 2:
The patent utilizes distinct color change characteristics for different temperature thresholds. The first thermochromic material exhibits a first color change at low temperature threshold while the second thermochromic material exhibits a second color change at high temperature threshold, providing visually distinguishable signals that simplify user interpretation of different temperature exposure conditions.
3Adaptability or versatility
If multiple separate indicators are implemented for temperature and humidity exposure monitoring, then adaptability to different environmental conditions is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The indicator employs a composite structure containing multiple thermochromic materials with different thermal response characteristics. This composite material system enables the single indicator to respond to various temperature conditions (low temperature, high temperature, and base temperature ranges) that would otherwise require multiple separate specialized indicators, thereby reducing system complexity while maintaining environmental adaptability.
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 solution allows for multiple environmental stimuli to be monitored with a single indicator, reducing manufacturing complexity and improving user interpretation, while maintaining accurate temperature exposure tracking.
Implementation Method 1
The first thermochromic material has a first initial color state while in a base temperature range and is configured to change to a low excursion color state below a low temperature threshold
Implementation Method 2
The second thermochromic material has a second initial color state while in the base temperature range and is configured to change to a high excursion color state above a high temperature threshold
Implementation Method 3
These materials exhibit a color changing hysteresis effect, changing to a high temperature color state when heated above a high temperature threshold, with the high temperature color state being maintained when the material returns to a temperature below the high temperature threshold
Data Source
AI summary
An apparatus, system, and method for producing a temperature exposure indicator is disclosed. The temperature exposure indicator includes a substrate and a mixture containing a first thermochromic material and a second thermochromic material. Each thermochromic material has an initial color state when the mixture is in a base temperature range and each thermochromic material is configured to change to an excursion color state at a certain temperature threshold. As a result, the mixture displays a low mixture excursion color state below a low temperature threshold and a high mixture excursion color state above a high temperature threshold.