Research On Underground Oil Pipeline Leakage Monitoring System Based On Air Pressure Sensin

As a national strategic resource,oil plays a vital role in national life,industrial development and even national defense construction.With the rapid development of social economy and the continuous improvement of industrial technology,the demand for oil in the world is increasing year by year.China mainly transports oil through underground pipelines,and oil leakage incidents occur from time to time due to various factors in the process of transportation.The main reasons for underground pipeline leakage include corrosion and aging of the pipeline itself,the quality of the pipeline and man-made damage.Therefore,underground pipeline leakage monitoring has become the key to ensure the safety of oil pipeline transportation,which has a profound significance for maintaining sustained economic growth and reducing environmental pollution.Through the analysis and comparison of underground pipeline leakage monitoring technologies at home and abroad,there is still room for improvement in the accuracy,alarm delay,reliability,development and utilization costs of pipeline leakage monitoring.A method of underground oil pipeline leak monitoring based on air pressure sensing and Amap is proposed,and an underground oil pipeline leak monitoring system is designed based on this method.The method has two innovative breakthroughs.Firstly,it adopts a method based on air pressure perception and is supplemented by temperature correction alarm thresholds to achieve accurate monitoring of small leaks;through a segmented monitor design layout,the location of the leak point can be accurately located within 10 meters,and the location information of the leak point can be sent to the data processing center in a timely and accurate manner through a relay network.Secondly,it imports Amap through the API interface of Gaode open platform and marks the pipeline location on the map by using the point marker class library,which can intuitively display the operation status of the pipeline and navigate to the leak point location.The pipeline leakage monitoring system is divided into three parts: leakage monitoring,data transmission and visualization.The leakage monitoring part adopts a segmented double layer sealed plastic shell wrapped around the outside of the underground oil pipeline.The double layer sealed shell is filled with inert gas,and a microcontroller and sensor are placed.By measuring the air pressure inside the double layer sealed shell,the pipeline is monitored for leakage.Considering the impact of oil temperature on the air pressure,the temperature inside the double layer sealed shell is monitored in real time,and the alarm threshold is corrected based on the temperature.The data transmission part adopts a combination of wired and wireless methods.The microcontroller sends the data to the relay node through wired methods,and the relay node sends the data to the data processing center through NB-IoT communication.The visualization part adopts a B/S architecture and a Goddard map.The Amap is imported on the Web page,and the actual location of the pipeline is marked on the map,which can intuitively show whether the pipeline leakage is occurring and the specific location of the leakage,and can navigate to the location of the leakage point.Through experimental verification,the system can meet the needs of underground oil pipeline leak monitoring,and it can send the location information of the leak point to the data processing center timely and accurately when a leak is occurring.The location of the leak point can be accurate to within 10 meters,and the warning delay can be controlled within 30 s,which shortens the troubleshooting time and ensures the smooth and safe operation of the underground oil pipeline.