| 1. | Acoustic emission and wavelet packet theories are adopted to detect pressure leakage location accurately
摘要采用声发射技术与小波包理论相结合的方法对管道泄漏点实现了精确定位。 |
| 2. | 2 all relate to pad ptfe inside lining after hydraulic pressure test , put up to whole prove 100 % , its test way of leak dot adopt electricity - spark to test
其泄漏点检验方法采用电火花测试3使用范围a .使用温度- 20200 |
| 3. | Combining with the time difference value of the pressure wave getting to both ends of the pipeline , adopts the genetic arithmetic to search the leak site of the pipeline
结合管道两端接收到负压力波的时间差，采用遗传算法搜索管道内的泄漏点。 |
| 4. | Basing on the laws , the paper applies the pressure - flow distinguishing method into the pipeline leak detection , and through using the method of detecting the time of pressure fall
结合此规律，将压力流量联合判别法应用于管道泄漏检测中，并通过捕捉压力波的突降时刻进行管道泄漏点定位。 |
| 5. | Investigation of the theories and technologies of leak detection , precisely locating the leak is significant in maintaining the safely running of pipeline and avoiding waste of resource
研究管道泄漏的检测理论、检测方法，实现对管道泄漏点的精确定位，对于维护管网的安全运行，避免资源的浪费，有着重要的理论意义和应用价值。 |
| 6. | Taking account of the corresponding characteristic of the signal singularity and wavelet transform module maximum in multi - scale changing , the discrete wavelet transform is applied to get the featured inflection point of negative pressure wave
利用信号奇异点与小波变换模极大值在多尺度上变化对应的性质，将离散小波变换应用到获取压力波信号序列特征奇异点中，可以对泄漏点进行定位。 |
| 7. | But there are few researches on robot ’ s olfaction , although the olfaction robots can complete lots of serious dangerous work instead of human , for example , finding the leakage of drugs , landmines , leakages of pipe and so on .
但是对机器人的嗅觉的研究和应用则相对较少。而具有嗅觉功能的机器人可以替人类完成很多高危险的工作,如进入毒气场搜寻毒气源,寻找地雷,查找管道的泄漏点等。 |
| 8. | The velocity change of negative pressure wave generated by pipeline leak during the process of transmission is analyzed , the formula of wave velocity changing with temperature is deduced , and the pipeline leak positioning problem is transformed into a function optimization problem
摘要通过分析管道泄漏产生的负压波在传播过程中速度的变化，推导出波速随温度变化的公式，并将管道泄漏点定位问题转化为函数优化问题。 |
| 9. | Leakage accidents in pipeline transportation occur frequently in recent years . in order to guarantee the pipelines work safely and minimize the losses caused by leakage accidents , it is necessary to study leakage detecting technology to raise the sensitivity of detection and accuracy of localization
近些年来，管道泄漏事故频繁发生，为保障管道安全运行和将泄漏事故造成的危害减少到最小，需要研究泄漏检测技术以获得更高的泄漏检测灵敏度和更准确的泄漏点定位精度。 |
| 10. | It testifies that chaos is existed in the sonic signal of boiler tube leak , according to the chaos theory and the correlative contents about the sky dynamics , and illustrates the physical meanings of the lyapunov exponent ( the change at the place of the boiler tube leak ) , based on the calculational methods of the lyapunov exponent and the peculiarities of boiler tube leak detection and diagnosis
根据混沌理论与空气动力学的有关理论，确定了炉管泄漏声信号中存在着混沌，在讨论如lyapunov指数的算法的基础上，针对锅炉炉管泄漏检测与诊断的特点，明确了lyapunov指数的实际物理含义(炉管泄漏点处状态的变化) 。 |
