• Kalman filter model of oil pipeline pressure wave is given out and the influences of model parameters on filtering effect are analysed.

    给出输油管道压力信号卡尔曼滤波模型,并分析了模型参数滤波效果影响

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  • The magnitude and the direction of wave pressure on submarine pipeline in silty bed are measured in physical model experiment.

    利用物理模型试验,测量土海床海底管道所受大小方向

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  • On the basis of suction wave method to detect pipeline leakage, the theses present that Kalman Filter can be used to get the featured inflection point of pressure wave.

    本文基于负压检测管道泄漏基本原理,提出利用卡尔滤波算法压力信号波形进行处理获得压力波形特征方法。

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  • In Assembled Pipeline there are a huge amount of sealing rubber rings for jointing of tubes and auxiliaries, which have effect on velocity of pressure wave.

    装配型管线内含有连接密封橡胶它们压力波速影响

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  • Combining with the time difference value of the pressure wave getting to both ends of the pipeline, adopts the Genetic Arithmeticto search the leak site of the pipeline.

    结合管道两端接收压力时间差采用遗传算法搜索管道内的泄漏

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  • In order to achieve a remote measurement for fluid flow, research was made on theoretic models and experimental measurement methods for transmission pressure wave of the horizontal pipeline.

    为了实现流体流量远程测量研究水平管道压力传播理论模型测量方法

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  • The velocity change of instantaneous negative pressure wave along the pipeline is analyzed when hot oil is transported. Two searching methods are applied to locate leakage through numerical integral.

    分析了输送管道沿程瞬态负压波传播速度变化,采取两种搜索方法数值积分求解泄漏点位置。

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  • Taking the negative pressure wave produced by pipeline leakage as a transient signal, the multi scale wavelet transform can be utilized to identify the pipeline leakage signal in local.

    利用尺度变换管道泄漏产生负压信号作为瞬态信号,识别管道的局部泄漏特征。

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  • Based on the negative pressure wave, the correlation analytic method is used for leakage detection and location of pipeline, the algorithm of the leakage location is also introduced in the paper.

    阐述依据负压应用相关分析法进行管道泄漏检测原理,给出漏点定位算法

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  • When there is a leak point in the pipeline, the pressure is fallen and the negative pressure wave occurs at once.

    管道某处突然发生泄漏时,泄漏处将出现瞬态压力,形成一个负压波,并一定的速度向管道上、下游两端传播。

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  • The inventive system can reduce gas pressure wave motion for maintaining stabilization of the pipeline gas pressure.

    发明系统减少气体压力波动用于维持管道气体压力的稳定

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  • The FEM equation of acoustic wave is used to calculate the air-current natural frequency and pressure pulsation in the pipeline.

    利用有限元法求解声学波动方程,建立了管内气流的有限元运动方程,计算出管内气柱的固有频率气流压力脉动。

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  • The FEM equation of acoustic wave is used to calculate the air-current natural frequency and pressure pulsation in the pipeline.

    利用有限元法求解声学波动方程,建立了管内气流的有限元运动方程,计算出管内气柱的固有频率气流压力脉动。

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