采用负压波法检测管线泄漏信号。
The negative pressure wave method was proposed for a pipeline leak detection system.
压力曲线上的负压波是管道泄漏的征兆。
Negative pressure waves (NPWs) in pressure measurements can be an indication of pipeline leakage.
本文研究了负压波法在管道泄漏判断和定位中的应用。
In this paper, the negative pressure wave method for pipeline leak detection and location of.
因此稳定地提取了负压波的拐点，提高了定位的准确性。
Therefore, the said inflexions are stably captured so as to improve the location accuracy.
构建了一套基于负压波和流量的管道泄漏检测试验系统。
Diagnosis and forecast of refrigerant leakage in the refrigeration system;
主要讲述了负压波理论在输油管道泄漏监测系统的具体应用情况。
This article narrated the application of the negative pressure wave method in the leak detecting system of transporting-oil pipe.
采用了瞬态负压波法、流量输差法和压力流量综合法等多种泄漏诊断方法。
Several leak diagnosis methods such as instantaneous negative pressure wave, flow-lack, and hybrid diagnostic method were used.
主要依据负压波方法，应用相关分析法理论对输油管道进行泄漏检测和定位。
This paper USES theory of correlation analytic method to detect and locate the leakage of oil conveying according to the negative press wave method.
最后，结合课题提出了基于无线扩频网络数据传输的负压波法泄漏检测系统的总体方案。
Finally, the dissertation brings forward the collectivity project of the negative pressure wave leak detecting system based on data transfer of wireless spread, spectrum network.
阐述了依据负压波法，应用相关分析法进行管道泄漏检测的原理，给出了漏点定位的算法。
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.
利用多尺度小波变换，把管道泄漏产生的负压波信号作为瞬态信号，来识别管道的局部泄漏特征。
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.
并结合管道瞬变模型法与负压波法建立多维判别法则，解决输油管道泄漏检测及漏点定位的问题。
By combining the transient change model method and rarefaction wave method, the multidimensional rules to detect the leakage and locate the leak point were set up.
分析了热油输送管道沿程瞬态负压波传播速度的变化，采取两种搜索方法数值积分求解泄漏点位置。
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.
根据定义的负压波反射系数关系式和瞬态压力响应图，应用行波计算方法得到泄漏点的全部信息（泄漏流量和位置）。
The full information(leak flow and location) of leak point is obtained applying the analysis of transient pressure plot and formula of negative pressure reflectance.
当管道某处突然发生泄漏时，泄漏处将出现瞬态压力突降，形成一个负压波，并以一定的速度向管道上、下游两端传播。
When there is a leak point in the pipeline, the pressure is fallen and the negative pressure wave occurs at once.
在负压波法泄漏检测系统中，数据处理对整个系统起着决定性作用，影响着对泄漏事件的判别准确性和泄漏点定位的精度。
The data handling to the whole system is taking a decisive factor in the negative pressure wave law leakage checkout system, and can influence the accuracy and the precision of this system.
针对此问题，采用了输差法进行泄漏的检测与报警、瞬态负压波法与稳态相关时延分析法相结合进行泄漏点的实时定位技术。
It is based on the measuring the difference between the input and autput of the pipeline and by using the combination of the WSV and the SRDA to locate the leakage.
本文基于负压波法检测管道泄漏的基本原理，提出了利用卡尔曼滤波算法对压力信号波形进行处理获得压力波形特征点的方法。
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.
本文基于负压波法检测管道泄漏的基本原理，提出了利用卡尔曼滤波算法对压力信号波形进行处理获得压力波形特征点的方法。
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.
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