基于近场零陷权的出砂监测干扰抑制方法

Method for suppressing interference of sand production monitoring based on near-field zero-sag weight

在出砂监测过程中,周围存在着大量的干扰和噪声,其中,对出砂监测影响最大的是管道振动所引起的。为了保证出砂监测的准确性,本文利用一维阵列传感器,构建近场声波传输模型,采用波束成形理论,实现对主瓣的波束聚焦成形,并在沿着管道方向的干扰,形成零陷达到对干扰的抑制。通过对出砂监测模型的分析,以及近场模型的构建,在近场模型下,根据接收信号之间的时延特性,实现对波束的聚焦成形以及对近场零陷最优权的推导、计算,使信号的来波方向上保持输出功率最大,而干扰方向形成零陷达到对干扰的抑制,改善出砂监测的准确性。仿真结果表明,该方法能够有效的实现对干扰的抑制,在来波方向形成良好的指向,而干扰方向实现零陷。

In the process of sand production monitoring,there are a lot of interference and noise around,among which,the biggest impact on sand production monitoring is caused by pipeline vibration.The field acoustic wave transmission model adopts the two-way forming theory to realize the segmented focusing forming of the main lobe,and the interference in the direction of the interconnecting pipes,forming a null to suppress the interference.Through the analysis of the sand production monitoring model and the synthesis of the near-field model,in the near-field model,according to the time delay characteristics between the received signals,the segmented focus shaping and the optimal right of the near-field null are realized.The derivation and calculation of the signal to keep the output in the direction of the incoming wave.The simulation results show that the method can effectively suppress the interference,forming a good direction in the direction of the incoming wave,and the power in the interference direction is the largest,and the interference direction forms null traps can suppress interference and improve the accuracy of sand production monitoring.