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Updated: Jan 23, 2026
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Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
Published on: November 7, 2016
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An acousto-optic coupled method for temperature field reconstruction in high gradient flame regions.
Jingkao Tan1, Na Li1, Qulan Zhou1
1State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
The Review of Scientific Instruments
|January 22, 2026
Summary
A new acousto-optic method improves temperature field diagnostics in flames by combining acoustic pyrometry with optical data. This approach overcomes limitations in high-gradient areas, significantly reducing errors for industrial furnace monitoring.
Area of Science:
- Combustion diagnostics
- Optical and acoustic sensing technologies
Background:
- Acoustic pyrometry (AP) is effective for temperature field reconstruction in uniform environments.
- Standard AP methods struggle with high temperature gradients, leading to hotspot localization failures and high errors (NRMSE > 8.3%).
Purpose of the Study:
- To develop an improved method for accurate temperature field diagnostics in complex combustion environments with high temperature gradients.
- To overcome the inherent limitations of traditional acoustic pyrometry in challenging flame regions.
Main Methods:
- An acousto-optic coupled method was proposed, integrating optical luminous flame information.
- This optical data served as an additional constraint to an enhanced acoustic pyrometry technique.
Main Results:
- The acousto-optic method successfully addressed AP's limitations in high-gradient flame areas.
- Achieved a normalized root mean square error (NRMSE) below 5%, a reduction of over 60% compared to improved AP.
Conclusions:
- The acousto-optic coupled method provides a novel and effective solution for temperature diagnostics in complex combustion.
- This technique has significant implications for real-time monitoring and control in industrial furnaces.
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