Irreversible Chromogenic Indicator for Overheating Localization
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Solution Overview
Problem
Existing methods for detecting overheating in technical installations are often based on unsustainable substances and lack the ability to provide a clear indication of overheated areas after the installation has cooled down, as they require analysis during or shortly after overheating and do not combine effectively with olfactory warnings.
Innovation Solution
A composition using irreversibly cleavable chromogenic indicator substances, such as glycosides, which change color or fluorescence upon overheating, allowing for precise localization of damaged areas even after cooling, combined with olfactory indicator substances for simultaneous visual and olfactory warnings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reversibly thermochromic substances are used for hotspot analysis, then the effect can be reproduced and analyzed during operation, but the method cannot detect overheated areas after the system has cooled down
Solution Approach 1:
The patent changes the fundamental parameter of thermochromic substance behavior from reversible to irreversible. Irreversibly thermochromic substances undergo permanent color change when exposed to overheating, allowing detection to persist after cooling. This parameter change resolves the contradiction by sacrificing reproducibility to gain extended detection capability beyond the immediate overheating event.
Solution Approach 2:
The indicator substances are applied as consumable coatings or stickers that are discarded after use. Once they have indicated an overheating event through permanent color change, they serve their purpose and can be replaced. This approach allows for simple, cost-effective detection without the complexity of reusable systems.
2Loss of time
If irreversibly thermochromic substances are used, then overheating can be detected after cooling, but the substances often cannot be produced sustainably and require corresponding coating applications
Solution Approach 1:
The indicator substances are designed to be self-contained in sticker or film form, requiring no separate coating application process. The substance serves multiple functions: it provides the thermal indication, adheres to the surface, and protects the underlying material. This self-service approach resolves the manufacturing and application complexity issues.
Solution Approach 2:
The patent uses composite material structures where the irreversibly thermochromic substance is integrated into a sticker or film matrix. This composite approach combines the functional indicator material with adhesive and protective layers, creating a ready-to-apply solution that simplifies manufacturing and application while maintaining sustainable production practices.
3Measurement precision
If known thermochromic substances are used, then overheating detection is achieved, but they cannot be combined with olfactory overheating protection
Solution Approach 1:
The patent merges visually active irreversibly thermochromic substances with olfactory indicator substances into a single integrated system. Both indicator types are applied together on the same technical installation, allowing simultaneous visual and olfactory detection of overheating. This combining approach resolves the contradiction by enhancing versatility while maintaining precise overheating detection capability.
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 localization of overheated areas post-cooling and provides a simultaneous visual and olfactory warning, using sustainable and non-toxic substances that can be applied to various technical devices, ensuring effective damage identification and prevention.
Implementation Method 1
the chromogenic indicator substance is irreversibly cleavable, preferably pyrolyzable, at a temperature greater than or equal to 50°C and less than or equal to 300°C
Implementation Method 2
chromogenic indicator substance... exhibits an absorption spectrum in the visible range different from that of the chromogenic indicator substance or a fluorescence different from that of the chromogenic indicator substance
Implementation Method 3
olfactory indicator substance... can also be based on glycosides, namely glycosides of warning odors
Data Source
AI summary
The invention relates to a method of providing an industrial installation with a warning signal against overheating, wherein a chromogenic indicator substance is applied to a device or components thereof or a chromogenic indicator substance is added to a casing; wherein the chromogenic indicator substance is selected from an ester, thioester, ether, thioether, amide, acetal, hemiacetal, carbamate, glycoside and/or combinations thereof, preferably selected from a glycoside, acetate, sulfate, phosphate and/or combinations thereof, more preferably selected from a glycoside, even more preferably selected from an N-glycoside, O-glycoside, S-glycoside and/or combination thereof, wherein the glycoside is an alpha- or beta-anomer; wherein the chromogenic indicator substance is irreversibly cleavable, preferably pyrolysable, at a temperature not less than 50°C, preferably not less than 60°C, more preferably not less than 70°C; and wherein at least one cleavage product, preferably at least one pyrolysis product, of the chromogenic indicator substance has an absorption spectrum different from the chromogenic indicator substance in the visible region or a fluorescence different from the chromogenic indicator substance.