On the ground, it can be found that there is a leak in the gas pipeline network several meters deep underground, and its positioning error will be reduced from 10 meters to a few centimeters, and even pinpointing which type of pressure pipeline is a problem. This technology based on Beidou satellite navigation and positioning will be put into use in Beijing in the second half of the year. Recently, the reporter learned from the signing ceremony of the China Satellite Navigation and Positioning Association and the China City Gas Association strategic cooperation agreement that the city's 16,500 kilometers of underground gas pipelines will be escorted by the Beidou positioning inspection.
The Beidou satellite navigation system is a global satellite navigation system that is self-constructed, independent, and open compatible with China. The relevant person in charge of the China Satellite Navigation and Positioning Association said that it is an important time and space and information infrastructure in China, making China the third country with an autonomous satellite navigation system after the United States and Russia.
The head of the China City Gas Association said that the total length of China's urban gas pipeline network has exceeded 400,000 kilometers and will reach 600,000 kilometers in 2016. In each city, there is a lineman wearing a gas group uniform, walking along the auxiliary road of the city road every day, in order to find hidden danger points that may cause underground gas pipeline failure.
At present, although the public can see such a lineman on the street, in the background professional field, the civilian GPS equipment still has the problem of 5 meters to 10 meters.
"This kind of error means that once a problem occurs, we can't accurately determine the location of the leak from the surface," said the relevant person in charge of Beijing Gas Group.
According to the person in charge, according to the preliminary test, the positioning of the Beidou satellite can control the error of the leak point within 1 meter or even a few centimeters, so that people can judge what problems occur in the pipeline several meters deep underground. In Beijing, the system already has basic hardware conditions that will be used to ensure safe operation of gas pipelines and to identify potential safety hazards in a timely manner.
"We plan to actively discover the field of leak detection and promote the use of Beidou satellite positioning." The relevant person in charge of the gas group said that at present, there are more than 600 line-patters in the city holding instruments on the street every day, and laser inspection vehicles are also in the daily. On the road, there is a special sent current in the ground to test whether there is leakage in the pipeline that should be insulated, so as to determine whether there is crack, resulting in safety hazards.
These inspection methods originally relied on the GPS positioning and return technology developed by the United States, but because the error often has a width above the lane, it is difficult to find the leak point, the right medicine.
The reporter learned that the gas group has already built six ground-enhanced base stations in Beijing, and will be equipped with special Beidou satellite positioning equipment for the hand-pushing testers in the hands of inspection vehicles and professional inspectors. It is expected that in September, the city, Tianjin and Hebei will complete the full coverage of the gas pipeline network by the Beidou application system.
According to the relevant person in charge of the China Satellite Navigation and Positioning Association, the Beidou satellite navigation system will promote the “100-city Bailianâ€, that is, the location network interconnection in 100 cities, and 100 location service application demonstration projects in selected cities. . These include the provision of tourist chartered buses, three types of class buses and transportation of dangerous chemicals, fireworks and firecrackers, civil explosives and other special vehicles for operation management, official vehicle use management and other applications; in urban construction, will be for high-rise building monitoring, ground Settlement measurement, pipeline measurement, etc. provide high-precision location services; in urban management, Beidou system will be applied to the safety management of underground pipeline networks such as gas pipelines, and the construction of smart cities.
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