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[Calculation of infrared temperature measurement on non-Lambertian objects]
Zhen Yang1, Shi-cheng Zhang, Li Yang
1Academy of Ship and Power Engineering, Naval University of Engineering, Wuhan 430033, China. ljyangzhen@163.com
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|October 14, 2010
Summary
This study establishes a mathematical model for infrared imaging, simplifying temperature measurement. It confirms that corrections are vital for accurate non-Lambertian object temperature readings, especially for smooth or low-emissivity surfaces.
Area of Science:
- Physics
- Thermodynamics
- Optics
Context:
- Infrared thermography relies on understanding thermal radiation principles.
- Accurate temperature measurement is crucial across various scientific and industrial applications.
- Existing models may not fully account for surface properties affecting infrared emissivity and reflectivity.
Purpose:
- To develop a universal mathematical model for infrared imagers.
- To derive a simplified formula for temperature measurement using infrared imagers.
- To investigate the impact of surface properties on infrared temperature measurement accuracy.
Summary:
- A universal mathematical model for infrared imagers was established based on infrared radiation theory.
- Experiments demonstrated that the sum of emissivity and reflectivity varies with object type, surface condition, and temperature.
- For non-Lambertian objects, particularly smooth or low-emissivity surfaces, corrections are necessary to avoid significant temperature measurement errors.
Impact:
- Provides a method for accurate infrared temperature measurement on non-Lambertian objects through amendments.
- Highlights the importance of considering surface characteristics for precise thermographic analysis.
- Enhances the reliability of infrared imaging in applications involving diverse materials and surface conditions.
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