摘要
传统的单(光)纤分布式光纤传感处理方法是将其看作多个独立的“等效传感单元”,并对每个单元单独处理,未有效利用阵列增益扩大探测范围。针对此问题,对单纤分布式光纤水听器的接收响应进行建模仿真,结果表明当处理信号波长大于空间分辨率2倍时,在30°~150°开角范围内,各等效传感单元的频响起伏在3 dB内,且等效传感单元的输出强度与等效声中心处声场强度差异约在3 dB以内,相位响应基本与等效声中心处声场相位一致。此时,单纤分布式光纤水听器的接收响应可满足阵列处理要求,利用阵列增益可提高目标探测能力。
The distributed optical fiber sensor is considered as multi-independent"equivalent sensor units"in traditional processing and treated separately for each unit,and the detection range is limited due to the array gain is ignored.Aim at the problem above,the receive response of distributed optical fiber sensor is modeled and simulated to explore the feasibility of array processing.Through the simulation results,in target wavelength is greater than twice of the spatial resolution and spanning angle is between 30°~150°condition,the frequency fluctuate of equivalent sensor is less than 3 dB.There is an intensity difference between response of equivalent sensor and the acoustic field of equivalent acoustic center,and there is almost no phase difference.Therefore,the receive response of distributed optical fiber sensor can meet the need of array processing,and array gain can be utilized to enhance detection capability.
作者
刘伟
吴昺炎
车易泽
LIU Wei;WU Bingyan;CHE Yize(The 23rd Research Institute,CETC,Shanghai 201900,China)
出处
《光纤与电缆及其应用技术》
2023年第3期1-3,28,共4页
Optical Fiber & Electric Cable and Their Applications
