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[Relationship between temperature range and wavelength bandwidth for multi band pyrometry]
Tai-ran Fu1, Xiao-fang Cheng, Mao-hua Zhong
1Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, China. trfu@mail.tsinghua.edu.cn
Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|December 20, 2008
Summary
This study extends tri-wavelength pyrometry to tri-band pyrometry for accurate radiation temperature measurements. It theoretically determines the sensor bandwidth required for effective temperature measurement range in pyrometry applications.
Area of Science:
- Thermodynamics
- Optical Engineering
- Metrology
Context:
- Accurate temperature measurement is crucial in many industrial and scientific applications.
- Traditional pyrometry methods face limitations in dynamic range and sensor sensitivity.
- Extending pyrometry techniques is necessary for non-distortion measurements.
Purpose:
- To extend tri-wavelength pyrometry to tri-band pyrometry using waveband measurements of radiation temperature.
- To discuss the restriction conditions for effective temperature measurement range in tri-band pyrometry.
- To theoretically determine the required sensor bandwidth for optimal pyrometry performance.
Summary:
- The research develops a tri-band pyrometry method based on a two-parameter linearity spectral emissivity model.
- It analyzes the impact of sensor dynamic range, minimum sensitivity, and measurement bandwidth on temperature measurement accuracy.
- Numerical simulations are used to present the variation of the effective temperature measurement range with sensor bandwidth for objects with known radiation characteristics.
Impact:
- Provides theoretical guidance for designing radiation temperature measurement sensors.
- Enables more accurate and reliable non-distortion temperature measurements in pyrometry.
- Optimizes the effective temperature measurement range by defining sensor bandwidth requirements.
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