Metal Strip Temperature Sensing with High-Emissivity Reference Areas
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Inaccurate temperature measurements of metal strips in metalworking processes due to uncertainties in emissivity, leading to incorrect furnace settings and quality issues.
Innovation Solution
Introducing locally positioned reference areas on the metal strip with higher emissivity to stabilize and enhance emissivity, allowing precise temperature determination using thermal imaging cameras and infrared sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If infrared sensors and thermal imaging cameras are used to measure metal strip temperature, then non-contact temperature measurement is achieved, but measurement accuracy deteriorates due to emissivity variations
Solution Approach 1:
The patent applies local quality by creating reference areas with deliberately modified surface properties (different emissivity, color, or texture) at specific locations on the metal strip. These localized modifications allow the infrared measurement system to distinguish between actual temperature variations and emissivity variations, thereby improving temperature measurement accuracy while maintaining reliability across different strip conditions.
2Measurement precision
If emissivity is not specified with sufficient accuracy, then temperature measurement becomes simpler, but measurement results deteriorate in precision
Solution Approach 1:
The patent introduces reference areas as intermediary elements that mediate between the metal strip surface and the infrared measurement system. These reference areas serve as known references with stable, distinguishable properties that allow the system to calculate and compensate for emissivity variations without requiring complex direct emissivity measurements of the strip itself.
3Measurement precision
If reference areas with different properties are introduced on the metal strip, then temperature measurement accuracy is improved, but strip processing complexity worsens
Solution Approach 1:
The patent applies preliminary action by pre-establishing reference areas on the metal strip before the temperature measurement process. These reference areas are created during strip production or preparation, allowing the measurement system to automatically reference them during operation without adding complexity to the actual temperature measurement process or requiring additional processing steps.
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 accurate and repeatable temperature measurement of moving metal strips, ensuring consistent process quality by minimizing emissivity variations and enabling real-time monitoring.
Implementation Method 1
the infrared sensor and/or the thermal imaging camera detects at least the surface of the metal strip
Implementation Method 2
reference areas have been introduced locally in the direction of movement of the metal strip, which have a higher emissivity compared to the rest of the surface of the metal strip
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a method for determining the temperature of a moving metal strip (1), wherein the metal strip (1) is passed by at least one infrared sensor (10) and/or at least one thermal imaging camera (10), wherein the infrared sensor (10) and/or the thermal imaging camera (10) detects at least partially the surface of the metal strip (1), wherein reference areas (2) have been introduced locally in the direction of movement of the metal strip (1), which have a higher emissivity compared to the rest of the surface of the metal strip (1).