Emergency rescue decision- making assistant system based on GIS for natural gas pipelines
Fujun Liu · Applied Mechanics and Materials · 2011
This paper presents its authors'development of an emergency rescue decision-making assistant system based on GIS for natural gas pipelines.As is known,it has become a key technical hardnut that threatens the safety of natural gas pipeline systems,because they are sometimes buried in the soil,sometimes river and water-crossed, leading to leakage and diffusion of gas,etc.in spite of corresponding research work has been extensively done,such as the offset mechanism and safety evaluation of pipeline,the optical fiber warning system and leakage inspecting box,the gas diffusion forecasting technology,and so on.In proceeding with our work in preparing this assistant system,we have first of all studied the finite models of pipes with different lenglhs(such as 12 m,60 m and 480 m)and the maximum offset distances are 567.5 mm,1 800 mm and 23.3 m respectively, we have fixed points of view on their offset tolerance judgment. Secondly,we have installed 43.335 km optical fiber along the pipeline and invented a leakage-inspection box.The results of a series of experiments show that the positioning accuracy of the optical fiber warning system is 200-300 m,whereas the leakage inspection box of ours sends the leakage information to the mobile system promptly.Thirdly,we have also established a gas-diffusion real-time calculation method and developed a fire and explosion hazard forecasting software.Depending on a geographic information system(GIS) platform,we have done necessary investigations on the achievements in above scopes as well as the supervisory control and data acquisition (SCADA)monitoring system plus the GPS location service of vehicles for maintenance,the IP telephone and video service,the regional broadcasting service,and the short messaging service(SMS).Last of all,we have also set up the emergency rescue decision-making assistant system based on GIS for natural gas pipelines,with which the pipeline rescue workers can be timely informed of the abnormal situation and timely response to be offered in accordance with the information received,as well as Level Ⅰ or Level Ⅱ response plan to be given.The trial-application experience of ours proves that the system has nice prompt response ability with the perfect commanding and controlling functions.