1) negative pressure wave
负压波
1.
State of Research on Negative Pressure Wave Techniques Applied to Leak Detection in Liquid Pipelines;
液体管道泄漏负压波诊断方法的研究现状及发展趋势
2.
Research on leak detection of fuel pipe based on analysis of negative pressure wave;
基于负压波分析的油管检漏技术研究
3.
Leak detection and location system for oil pipe based on negative pressure wave method;
基于负压波法的输油管道泄漏检测定位系统
2) suction wave
负压波
1.
One of the key technologies of the method is to determine the time between suction waves going through the two measuring points of the pipeline.
负压波法检测管道的突发性泄漏具有较高的灵敏度和定位准确度,在国内外得到广泛的应用,该方法的关键技术之一在于准确测定负压波通过上下游测量点的时间差。
2.
Under this platform,an embedded pipeline leak detection system was designed based on the principle of suction wave.
对嵌入式实时操作系统μC/OS-Ⅱ在ARM7上的移植作了简要介绍,构建了基于RTOS(Real-Tim eOperating System)的嵌入式软硬件平台,并在这一平台上设计了一套基于负压波原理的嵌入式原油管道泄漏检测系统。
3) negative pressure wave
负压波法
1.
Based on the analysis of occurrence of negative pressure waves and unsupervised learning of pattern recognition,this paper makes use of ISODATA method to classify the negative pressure waves,determine the working condition of the pipeline,and carry out the optimization by K-L t.
为了提高负压波法检测管道泄漏的准确性和灵敏度,正确区分不同工况下的压力波形,通过对负压波的产生及模式识别中无监督学习方法的研究,采用ISODATA动态聚类算法对负压波波形进行分类,判断管道所处的工况状态。
2.
Introduced in the works how to detect and leakage locations by means of negative pressure waves,and the calculate method.
文中主要介绍了负压波法泄漏监控定位的原理、计算方法。
3.
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。
4) negative pressure wave
负压力波
1.
In consideration of the heating transportation of crude oil and the influence of crude oil temperature on negative pressure wave speed, and on the basis of common negative pressure wave leakage location method of crude oil pipeline, the numerical integration based on MATLAB is reali.
鉴于此,考虑我国原油在输送过程中多采用加热输送的特点,以及原油温度变化对负压力波波速的影响,在常规原油管道负压力波泄漏定位方法的基础上,提出了基于MATLAB实现数值积分并进行精确泄漏点定位的计算方法,结合实例验证了该定位方法的实用性。
2.
Using two sensors set at each side of a certain long oil pipe line,we can position the spilling point with the propagation time difference of the negative pressure wave caused by spillage,which can be more exactly when considering the relation between its propagation velocity and temperature in different mediums in this system.
在一定长度的管线两端安装传感器 ,测量出由于漏油而产生的负压力波 ,根据负压力波传到两传感器的时间差计算出漏点的位置。
5) vacuum pressure fluctuation
负压波动
1.
Presents Hydro macroparticle urea granulation technology with fluid bed and the reasons,phenomena and harmfulness of vacuum pressure fluctuation,and discusses relative measures to solve the problem.
介绍海德鲁流化床大颗粒造粒技术及该系统造粒机负压波动的形成原因、现象以及危害,并提出相应解决方案。
6) blast underpressure
冲击波负压
1.
Treatment of inner-ear impact injuries caused by mid-intensity blast underpressure in guinea pigs;
中等强度冲击波负压暴露后豚鼠内耳损伤的治疗
2.
Observation on histological changes of cochlear trauma in guinea pigs exposed to blast underpressure;
豚鼠冲击波负压暴露后耳蜗创伤的组织学观察
3.
Morphologic observation in the hair cell nucleus of the guinea pig exposed to blast underpressure;
中等强度冲击波负压暴露后豚鼠耳蜗毛细胞核形态学观察
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