Study Of Leak Supervision And Location Of Water Pipelines Of Subway Tunnel

In view of the complex pipeline and equipment, hostile environment of subway tunnel, water supply pipeline(including fire protection, production, living water supply pipeline) through the actual situation of the whole subway tunnel.Once the fire water supply pipeline leak, if there is no maintenance as soon as possible.when a fire occurs, fire fighting water pressure and flow cannot be guaranteed.While accelerating the corrosion of pipeline and the surrounding equipment in subway tunnel, even serious causes the damage of signal equipment, produce significant security hidden danger.At present within the subway tunnel on water supply pipeline leak location detection still rely on personnel inspection stage, requires a lot of manpower and material resources.So the water supply pipeline leak monitoring is of great significance.Paper on the basis of investigating present situation of water supply pipeline leak detection and analysis of environmental noise in subway tunnels on the influence of leakage signal monitoring, as well as the limitations of cross-correlation analysis method is applied to funnelled positioning, this paper proposes the methods of removal of environmental noise and improve the positioning method.Based on ZigBee wireless communication technology, on the theory of ultrasonic leak detection method based on building the leakage monitoring vibration acceleration signal of wireless sensor network(WSN), complete including wireless sensor node, the coordinator node hardware design, software design, etc.Choose the sensor nodes with low-power module, using the Altium Designer 9 software design hardware circuit.On the basis of Z-stack protocol stack, using the IAR Embedded Workbench for 8051 8.30 as development platform, complete software design of node.Based on the LabVIEW software development for water supply pipeline leak monitoring platform system.Subway tunnel by using information technology combined with ultrasonic leak detection technology, water supply pipeline leak monitoring, can reduce staff labor, through the PC monitoring platform can locate leaks and funnelled, conducive to timely report to the police and maintenance.This study for the actual subway tunnel has guiding significance for water supply pipeline leak detection.