Distributed Airflow Sensing Based on High-Spatial-Resolution BOTDA and a Self-Heated High-Attenuation Fiber

被引：5

作者：

Zhang, Hongying ^{[1
]}

Lei, Yanyang ^{[1
]}

Zhou, Jinzhe ^{[2
]}

Dong, Yongkang ^{[3
]}

机构：

[1] Harbin Univ Sci & Technol, Sch Measurement & Commun Engn, Heilongjiang Prov Key Lab Quantum Control, Harbin 150080, Peoples R China

[2] Harbin Univ Sci & Technol, Sch Sci, Harbin 150080, Peoples R China

[3] Harbin Inst Technol, Natl Key Lab Sci & Technol Tunable Laser, Harbin 150001, Peoples R China

来源：

SENSORS | 2022年 / 22卷 / 11期

基金：

中国国家自然科学基金;

关键词：

distributed airflow sensing; Brillouin optical time domain analysis; high-attenuation fiber; Brillouin frequency shift; SILVER-COATED FIBER; BRAGG;

D O I：

10.3390/s22114017

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An all-fiber distributed airflow sensing method based on a differential pulse-width pair Brillouin optical time domain analysis (DPP-BOTDA) and a self-heated high-attenuation fiber (HAF) is proposed and demonstrated. The HAF heated the sensing fiber, producing a gradient temperature distribution in it through physical contact, where the temperature distribution was obtained by DPP-BOTDA with a spatial resolution of 5 cm. The heat loss caused by the airflow was reflected in the decrease in the Brillouin frequency shift and spatially resolved by DPP-BOTDA. Distributed airflow sensing was experimentally demonstrated for measurements of airflow movement, multiple airflow sources and the deflection angle of the airflow. The positioning error of the airflow was no larger than similar to 2.2 cm; for the deflection angle measurements of the airflow, the maximum demodulation error was 2.5 degrees within the angle range of 0-30 degrees.

引用

页数：10

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