Design And Energy Storage Control Of Internal Detector Based On Pipeline Energy

With the development and use of energy resources such as oil fields and natural gas in China,the transportation of oil and gas pipeline plays an important role in the economic development of our country.However,with the increase of service life and the change of the surrounding environment of oil and gas pipelines,oil and gas pipelines will be subject to varying degrees of corrosion,time is too long prone to oil spills,even cause a large area of economic losses and environmental pollution.Pipeline internal detector is an important equipment to detect pipe wall defects and predict the service life of pipelines.It appears to be in a timely manner to understand the pipeline situation and to take measures to provide the possibility.In order to ensure the safety and reliability of pipeline leak detector,the most important thing is to keep the stability of the power supply system.Because the detector system of the pipeline is in a closed environment,the external power supply can not provide power for the external power supply,therefore,the inner detector needs to bring its own power supply system to provide power.The power supply system is composed of two parts:detector comes with power supply battery and self power generation system.In view of the shortcomings of the existing equipment,such as poor reliability,voltage instability and so on.In this thesis,a new type of power generation device is designed,including inner detector support wheel power generation and piezoelectric vibrator power generation.The main contents of this thesis are as follows:Firstly,the detailed structure of the supporting wheel and the piezoelectric vibrator is designed according to the structure of the inner detection.The material selection,size and mechanical structure of the support wheel and piezoelectric vibrator are studied in detail.To ensure that the inner detector is running normally in the pipeline,the close contact between the supporting wheel and the piezoelectric vibrator and the pipe wall.Secondly,a collaborative control strategy using genetic algorithm is proposed.Due to a plurality of supporting wheels are distributed around the inner detector,when the detector is running,the frictional force of each supporting wheel is different and the power generation voltage is also different.Therefore,the connection mode of the supporting wheel can not be determined in order to reach the required voltage of the battery pack.In this thesis,a genetic algorithm is designed to control the support wheel group,the optimized combination of the voltage to achieve the required voltage.Thirdly,a DC/DC voltage stabilizing system with auto disturbance rejection controller was designed.When the detector runs too fast or too slow,the optimal combination voltage can not be achieved.In view of this situation,this paper designs a DC/DC voltage stabilizing system based on auto disturbance rejection control algorithm.In this thesis,after considering the characteristics of the actual operation of the inner detector in the pipeline for a long time,a set of inner detector self generating device and its control method is designed.It can effectively ensure the safety,high efficiency and stability of the inner detector.