Color-Changing Environmental Indicator with Dynamic Reference Component
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Solution Overview
Problem
Conventional environmental indicators lack flexibility in responding to various environmental stimuli, such as temperature, humidity, pH, and ultraviolet radiation, and often have fixed-color references that cannot match the specific environmental response characteristics of all host products, limiting their effectiveness in monitoring product quality and freshness.
Innovation Solution
The development of color-changing environmental stimulus indicators featuring a substrate with an active indicator and a reference component that change color in response to environmental stimuli, allowing for customizable responses to different stimuli, including temperature, cumulative temperature, humidity, and ultraviolet radiation, with the option for the active and reference components to change color at different rates or in different ways, extending the indicator's lifetime and matching the host product's characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a constant/fixed-color reference is used in conventional environmental indicators, then the indicator structure is simple, but the indicator cannot match the specific environmental response characteristics of different host products, reducing adaptability
Solution Approach 1:
The reference component is transformed from a static fixed-color element to a dynamic color-changing element that responds to environmental stimuli. The reference component now contains a reference indicator material that changes color in response to environmental conditions, allowing the reference to adapt and match the host product's response characteristics dynamically.
Solution Approach 2:
The reference component's color properties are changed dynamically through environmental stimulus response. By selecting reference indicator materials with different response characteristics (different activation energies, response rates, or stimulus types), the system can match various host product characteristics by changing the reference component's parameters rather than its structure.
2Duration of action of moving object
If the active indicator and reference component change color at the same rate, then the comparison is simple, but the indicator lifetime is limited and cannot be extended
Solution Approach 1:
The active indicator and reference component are designed with different local qualities in terms of their color change characteristics. The reference component uses indicator materials with different activation energies or response rates compared to the active indicator, allowing each component to have optimized properties for its specific function while working together to extend the overall indicator lifetime.
3Adaptability or versatility
If the indicator responds to multiple environmental stimuli, then the monitoring capability is improved, but it becomes difficult to distinguish the effect of each stimulus
Solution Approach 1:
The indicator system is segmented into functionally distinct components: an active indicator that responds to the primary stimulus of interest and a reference component that responds to environmental stimuli in a controlled manner. This segmentation allows the active indicator's response to be isolated and measured against the reference, enabling differentiation of the primary stimulus effect from other environmental factors.
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
These indicators provide extended monitoring capabilities, allowing for a longer lifetime and improved matching of host product characteristics, enabling effective monitoring of products like vaccines, foodstuffs, and industrial items by responding to multiple environmental conditions and offsetting irrelevant stimuli effects.
Implementation Method 1
the active indicator and the reference component change color in response to the same environmental stimulus. In other embodiments, the active indicator and the reference component change color in response to different environmental stimuli. The environmental stimulus includes one or more of temperature, cumulative temperature, humidity, pH, and ultraviolet radiation.
Implementation Method 2
The environmental stimulus includes one or more of temperature, cumulative temperature, humidity, pH, and ultraviolet radiation
Implementation Method 3
In some embodiments, the active indicator or the reference component is a color changing ink, such as a diacetylene
Implementation Method 4
the color-changing environmental stimulus indicator includes an ultraviolet radiation filter configured to protect the active indicator or the reference component from exposure to ultraviolet radiation
Data Source
AI summary
A color-changing environmental stimulus indicator includes a substrate, an active indicator placed above the substrate, and a reference component. The active indicator is configured to change color in response to an environmental stimulus. The reference component is also color changeable in response to an environmental stimulus. The reference component is configured to have a similar appearance to the active indicator at an end point. The environmental stimulus includes one or more of temperature, cumulative temperature, humidity, pH, and ultraviolet radiation.