【摘要】 由于缺少管道沿途测量数据,近海管道运输中的泄漏检测问题比陆地流体管道泄漏检测系统更具有挑战性.我们用传输线模型来考虑其线性动力学部分,然后通过有限差分法和偏微分方程拉普拉斯变换来比较传递函数的频域响应.仿真结果表明,有限维模型在低频下可以有效地逼近原始线性模型.由于近海管道监控与数据采集系统缺少传感器,进一步提出了一种新型集成漂流传感器的方法来解决此类型的检测问题并对数据同化框架进行了简要地介绍.更多还原

【Abstract】 Leakage detection in offshore pipeline transport is much more challenging than that in ground fluid transport systems due to the lack of measurements along the pipelines.The linear dynamics is considered using the transmission line model,and then we compare the frequency responses of the transfer functions are obtained via both the finite difference method and PDE Laplace transform.The simulation result shows the effectiveness of the finite dimensional modelswhich can approximate the original linearized model accurately in low frequencies.Due to the scarcity of the sensors in the SCADA(the supervisory control and data acquisition)systems of offshore pipelines,a novel integrated drifting sensor solution is proposed for this type of detection problem and a brief introduction to the data assimilation framework is given.更多还原