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China Daily Network, October 26 (Reporter Xu Dan) In recent years, with the rapid development of cities, public security has become an important part of the urban governance system. As a sub-center city of the group of world-class cities in the Yangtze River Delta, Hefei is a regional megacity. With the continued expansion of the population, functions and scale of cities, the operation of major urban infrastructure systems becomes increasingly complex and risks to urban security continue to increase.
Technology makes cities smarter
Tsinghua University Hefei Institute of Public Security addresses the main urban security needs and uses big data, cloud computing, Internet and other technologies to analyze the primary data security model, in order to carry out management from vital urban projects from “invisible” to “visible”, from “investigation and post-hoc management” to “prevention during the event”, from “passive response” to “prevention and active control”. Focusing on the frontiers of social system security science and key scientific and technological issues in disaster settings, focusing on the simulation and monitoring of the disaster environment, research and early warning of disaster mechanisms, analysis of disaster big data and technical support capacity building, we are committed to building leading international public safety investigation facilities.
Experimental and Research Platform for Urban Lifeline Engineering Safety Technology (Photo by Xu Dan, China Daily)
The intelligent research experimental platform for urban lifeline safety is the world’s first large-scale and large-scale integrated underground pipeline experimental platform, which can meet the investigation of a single disaster and comprehensive disaster mechanism of coupling of various pipelines such as water, gas, drainage and heating supply, and carry out urban lifeline engineering. Research on theories and methods of health diagnosis and evaluation for safe operation, monitoring and elimination of early warning and risk management and control systems, equipment development and standard formulation research
Pipeline Leak Detection Smart Ball (Photo by Xu Dan, China Daily)
Hidden dangers can also be verified by listening to the sound. To make more accurate prediction of pipeline network leak risks and accurate positioning of small leak points, Tsinghua Hefei Institute has independently developed pipeline leak positioning smart detection balls to detect pipeline leaks o airbag detection The full range of coverage.
According to the staff, leaks with a leakage volume of ≥0.3 liters / min can be detected by the “smart ball”, the positioning accuracy is two meters, the single operation time is more than 15 hours, and the Single detection distance exceeds 20 kilometers. By changing the water pressure, the “smart ball” can easily pass obstacles such as elbows and valves.
Technology makes cities safer
In order to ensure the safe operation of urban lifeline projects, such as bridges, gas, water supply, drainage, heat pipe network, etc., promote the implementation of security technology development strategy around to “big industry and security”, relying on the security of urban lifeline projects developed by Tsinghua University Hefei Public Security Research Institute. By operating the monitoring system, Hefei is gradually building a new model of urban security management and active risk prevention and control.
Safety operations monitoring system for urban lifeline projects (Photo by Xu Dan, China Daily)
According to the staff, “The lifeline bridge detection system is similar to the standard electrocardiogram of our human body. It is evaluated twice a day in the morning and at night. Through said indicator, it can be quickly evaluated the current operation of the bridge, which solves the rapid fusion and analysis of sensor data., which greatly improves the accuracy and effectiveness of the bridge operation evaluation. “
Today, the monitoring scope of the Hefei City Lifeline Security Operations Monitoring System covers 51 bridges and more than 2,000 kilometers of underground pipelines in Hefei. In the last two years of operation, the system has effectively alarmed 92.8 cases per month on average. It has successfully warned of 171 cases of fire and explosion risks caused by leaks in the pipeline network, 57 cases of secondary disasters caused by water supply leaks and 2,048 cases of alarm when it is detected that the concentration of water is exceeded. biogas. There were 9 abnormal pipeline network operation incidents, 37 abnormal pump station operation incidents, 4,000 heavy vehicle overloading incidents on bridges, and 21 emergencies such as vehicle collisions and heavy vehicle jams on decks. bridges. The accident rate of the underground pipeline network decreased by 60% compared to the pre-inspection rate, and the risk investigation rate increased by 70%. It effectively ensures the safe operation of urban lifeline projects within the monitoring range, improves the level of refined urban security management, and accompanies urban residents to live and work in peace.
