摘要
基于光栅阵列温度测量系统,设计了一种适用于长距离温度监测场景的温度解调系统,通过分布式光纤拉曼放大器的引入对传感链路提供分布式的放大效果,并对回光信号进行了前置放大,有效补偿了信号长距离传输面临的损耗问题。利用光纤光栅的中心波长与温度变化的关系实现了温度解调,系统的空间分辨率可达1 m,在55 km传感距离处实现了温度测量精度达±1℃,温度分辨率为0.1℃,响应时间10 s的性能指标。与现有的光栅阵列温度系列产品相比,测量距离大幅提升,在管线监测等长距离、大范围工程领域有广阔的发展和应用前景。
Based on the grating array temperature measurement system,a temperature demodulation system suitable for long-distance temperature monitoring scene is designed.Through the introduction of Distributed Fiber Raman amplifier,the distributed amplification effect is provided for the sensing link,and the return light signal is pre amplified,which effectively compensates the loss problem of signal long-distance transmission.The temperature demodulation is realized by using the relationship between the central wavelength of fiber Bragg grating and the temperature change.The spatial resolution of the system can reach 1 m.The temperature measurement accuracy is ±1 ℃,the temperature resolution is 0.1 ℃ and the response time is 10 s at 55 km sensing distance.Compared with the existing grating array temperature series products,the measurement distance is greatly improved,and it has a broad development prospect in pipeline monitoring and other long-distance and large-scale engineering applications.
作者
欧阳修筑
OUYANG Xiuzhu(Wuhan Institute of Posts and Telecommunications,Wuhan 430070,China)
出处
《电子设计工程》
2022年第4期37-42,共6页
Electronic Design Engineering
关键词
温度测量
光栅阵列
拉曼放大器
长距离温度解调
temperature measurement
grating array
Raman amplifier
long distance temperature demodulation
