The Application Of Localization By Positive And Negative Pressure Wave In The Block-detection Of Buried Pipeline

The piping transports in the fluid transport have a important function ,which involved many subjects,such as pipeline hydrodynamics,thermodynamics,sensor technology, and signal processing.When the piping occurrence blocks, how rapid, examining of precision block some position for reduce the manpower material resources thrown in for blocking up row has a very important function. The paper introduces the current development conditions of pipeline transportation firstly.This text combines piping check to block up of positive pressure wave the method and piping check leak of negative the model pressing a method, putting forward to make use of orb produce plus or minus press the method of wave to carry on blocking a fixed position.Propose to use pressure and flow for determining the ratio of the threshold to justice pipeline efficiency to make whether to release a sphere model. For the conventional pressure wave velocity positioning method, use a complex of a modified Simpson's formula, combining with pipe ends to receive the positive and negative pressure wave time difference,and use genetic algorithm search pipeline blockage point. In this paper, the system uses the wavelet transform method of data de-noising, plug the detection and location method from the principles of the realization of the computer are all carried out a detailed analysis and discussion. In this paper, make the application of MATLAB software for data processing. In the use of MATLAB function of this powerful signal-processing tools to capture the signal analysis, mainly for the original data de-noising and signal feature extraction. And in order to locate accurately, use GPS to unite in the first end of the data acquisition system, the system time.Finally, in about of the topics, the paper proposes based on spread spectrum wireless network data transmission positive and negative pressure wave blocking system's overall inspection program. Using Virtual Instrument Technology has designed a set of detection and location system and its hardware and software programs have been designed.