Distributed Optical Fiber Micro-vibration Sensing for Broken Fabric Bag Inspection in a Baghouse Filtration System

5th Annual International Conference on Material Engineering and Application

工业技术（总论）;材料科学

Shi, Bo^1^2 ; Li, Jun^1 ; Liu, Xu'an^1^2 ; Tang, Yuquan^1 ; Pang, Tao^1 ; Dong, Fengzhong^1^2

Anhui Provincial Key Laboratory of Photonic Devices and Materials, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei

230031, China^1

University of Science and Technology of China, Hefei

230029, China^2

关键词: Distributed optical fiber;    Filtration systems;    Laser intensities;    Microvibrations;    Monitoring technologies;    Optical time domain reflectometer;    Phase sensitive;    Time domain reflectors;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/484/1/012035/pdf
DOI  :  10.1088/1757-899X/484/1/012035

来源: IOP

【 摘 要 】

A method based on phase sensitive optical time domain reflectometer (φ-OTDR) distributed optical fiber micro-vibration sensor, is proposed to detect and locate the broken fabric bags in a baghouse filtration system. The mechanism is by detecting the laser intensity change in a standard optical fiber cable hang in the filter bag, and which is the result of the dynamic airflow's perturbation in the baghouse. While the location of broken bags is realized by optical time domain reflector method. Field trial in Hefei cement industry platform is conducted and test results show that the minimum detectable hole size is 1cm2. The method provides an alternative way for environmental dust emission monitoring and pre-warning in cement industry. Other application niches such as power plant, coalmine industry could also benefit from this new monitoring technology.