Non-intrusive flow measurement based on a distributed feedback fiber laser
Non-intrusive flow measurement based on a distributed feedback fiber laser
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DOI：
10.3788/col202018.021204
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发表时间：
2020-02-10
影响因子：
3.5
通讯作者：
Peng, Gangding
中科院分区：
文献类型：
--
作者：
Ni, Jiasheng;Shang, Ying;Peng, Gangding
提出了一种基于分布反馈光纤激光器（DFB-FL）的非侵入式流量测量方法。推导了DFB-FL的波长与管道中液体流量的关系。在此理论指导下，完成了流量传感器的设计和测试。在10 Hz ~ 500 Hz的频率范围内，响应曲线比较平坦，流量传感器的响应具有很高的线性度。采用能量分析法，在不同频率区间内，对0.6 ~ 25.5m3/h的流量进行了精确测量。实现了0.046 m/s的最小流速。实验结果验证了基于DFB-FL的非侵入式流量测量新方法的可行性和小流量的准确测量。
We propose a new non-intrusive flow measurement method using the distributed feedback fiber laser (DFB-FL) as a sensor to monitor flow in the pipe. The relationship between the wavelength of the DFB-FL and the liquid flow rate in the pipeline is derived. Under the guidance of this theory, the design and test of the flow sensor is completed. The response curve is relatively flat in the frequency range of 10 Hz to 500 Hz, and the response of the flow sensor has high linearity. The flow from 0.6 m(3)/h to 25.5 m(3)/h is accurately measured under the energy analysis method in different frequency intervals. A minimum flow rate of 0.046 m/s is achieved. The experimental results demonstrate the feasibility of the new non-intrusive flow measurement method based on the DFB-FL and accurate measurement of small flow rates.