A photoacoustic temperature measurement method combined with quantitative absorption distribution

2021 ◽  
Author(s):  
Yang Liu ◽  
Mingjian Sun ◽  
Yiming Ma ◽  
Zezheng Qin
Keyword(s):  
Temperature Measurement ◽  
Measurement Method ◽  
Quantitative Absorption

scholarly journals Turbine Blade Three-Wavelength Radiation Temperature Measurement Method Based on Reflection Error Correction

2021 ◽  
Vol 11 (9) ◽  
pp. 3913
Author(s):  
Kaifeng Zheng ◽  
Jinguang Lü ◽  
Yingze Zhao ◽  
Jin Tao ◽  
Yuxin Qin ◽  
...  
Keyword(s):  
Temperature Measurement ◽  
Turbine Blade ◽  
Measurement Method ◽  
Turbine Blades ◽  
Target Surface ◽  
Maximum Error ◽  
Radiation Temperature ◽  
Average Error ◽  
Real Surface ◽  
Wavelength Radiation

The turbine blade is a key component in an aeroengine. Currently, measuring the turbine blade radiation temperature always requires obtaining the emissivity of the target surface in advance. However, changes in the emissivity and the reflected ambient radiation cause large errors in measurement results. In this paper, a three-wavelength radiation temperature measurement method was developed, without known emissivity, for reflection correction. Firstly, a three-dimensional dynamic reflection model of the turbine blade was established to describe the ambient radiation of the target blade based on the real surface of the engine turbine blade. Secondly, based on the reflection correction model, a three-wavelength radiation temperature measurement algorithm, independent of surface emissivity, was proposed to improve the measurement accuracy of the turbine blade radiation temperature in the engine. Finally, an experimental platform was built to verify the temperature measurement method. Compared with three conventional colorimetric methods, this method achieved an improved performance on blade temperature measurement, demonstrating a decline in the maximum error from 6.09% to 2.13% and in the average error from 2.82% to 1.20%. The proposed method would benefit the accuracy in the high-temperature measurement of turbine blades.

scholarly journals Research on a fiber Bragg grating temperature measurement method for inter-satellite laser link

2020 ◽  
Vol 91 (1) ◽  
pp. 015007
Author(s):  
Chi Wang ◽  
Yidong Zhang ◽  
Jianmei Sun ◽  
Chenye Yang ◽  
Xuan Ren ◽  
...  
Keyword(s):  
Temperature Measurement ◽  
Fiber Bragg Grating ◽  
Measurement Method ◽  
Bragg Grating

29pm1-F-4 Thermal property and temperature measurement method in micrometer scale

2015 ◽  
Vol 2015.7 (0) ◽  
pp. _29pm1-F-4-_29pm1-F-4
Author(s):  
Kimihito Hatori ◽  
Takaaki Awano ◽  
Tetsuya Ohtuki ◽  
Makoto Sekine
Keyword(s):  
Thermal Property ◽  
Temperature Measurement ◽  
Measurement Method ◽  
Micrometer Scale
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