基于SFED和RBS响应区间边界的φ-OTDR振动定位研究
Vibration Location of φ-OTDR Based on SFED and RBS Response Section Boundary
路泽永 1刘欣 2赵亚丽 3高超 4沙洲5
作者信息
- 1. 河北石油职业技术大学电气与电子系,河北承德 067000;河北省仪器仪表工程技术研究中心,河北承德 067000
- 2. 河北石油职业技术大学数理部,河北承德 067000
- 3. 河北省仪器仪表工程技术研究中心,河北承德 067000;河北石油职业技术大学工业技术中心,河北承德 067000
- 4. 河北石油职业技术大学工业技术中心,河北承德 067000
- 5. 天津大学精密测试技术及仪器国家重点实验室,天津 300072
- 折叠
摘要
针对传统管道泄漏监测系统的空间分辨率易受探测脉冲宽度限制的问题,提出一种用瑞利后向散射(Rayleigh back scattered,RBS)响应区间边界结合空-频能量分布定位分布式光纤振动入侵事件的方法.利用空间频率能量分布显示RBS响应区间的左边界来表征振动入侵事件的准确位置.采用不同宽度的探测脉冲对设计的相敏光学时域反射仪(φ-optical time-domain reflectometer,φ-OTDR)系统进行振动检测实验,研究了 RBS响应区间随探测脉冲宽度变化的特性.然后通过3种不同环境下的振动测试,验证了采用空-频能量和RBS响应区间边界相结合的方法进行振动定位的可行性和优越性,实验证明采用提出的方法,在采样率为50 MS/s时,系统定位精度为2 m.
Abstract
This paper proposes a method for locating distributed fiber vibration intrusion events using Rayleigh backscattering(RBS)response section boundary combined with air-frequency energy distribution,aiming to address the issue of limited spatial resolution in traditional pipeline leakage monitoring systems due to the width of the detection pulse.The spatial frequency ener-gy distribution is used to display the left boundary of the RBS response section to characterize the exact location of vibration in-trusion events.Vibration detection experiments were carried out on the designed phase-sensitive optical time-domain reflecto-meter(φ-OTDR)with different width detection pulses,and the characteristics of RBS response section varying with the width of detection pulses were studied.Then,through vibration tests in three different environments,the feasibility and superiority of vibration location by combining air-frequency energy and RBS response section boundary are verified.The experiments show that the location accuracy of the system is 2 m when the sampling rate is 50 MS/s.
关键词
空-频能量分布/响应区间/左边界/瑞利后向散射/振动/定位Key words
spatial frequency energy distribution/response section/left boundary/Rayleigh back scattered/vibration/location引用本文复制引用
出版年
2024
NETL
NSTL
万方数据