Design Of Wireless Ad Hoc Network For Airfield Lighting

Airfield lighting is an important navigational aid,which ensures a smooth take-off and landing of aircraft at night and in complex weather conditions;its reliability and stability of the operation is closely related to the flight safety.Aiming at low efficiency of manual inspection for airfield lighting,maintenance workload of taxiway guide lights is large and low guiding efficiency,in order to meet requirements of the readiness temporary airport,airfield lighting must have flexible control,good concealment,mobility and other characteristic;in this paper,we propose a design scheme that can achieve airfield lighting wireless ad-hoc network.By wireless sensor networks control method to achieve the airfield lighting flexible control and malfunction inspection,which can greatly improve the operation efficiency of airport and ensure airfield lighting reliability and stability.Due to ZigBee technology that flexible networking,low power consumption,strong network expansion and stronger network robustness and other characteristics,this subject adopts ZigBee technology to achieve self-organizing network and intelligent control of airfield lighting system.System consists of three parts,including the monitoring center,coordination and airfield lighting terminal controller.The monitoring center and coordinator communicate by RS485 bus,it mainly complete the reception,storage and analysis of the data of terminal node,and by transmitting the control command to achieve airfield lighting control and monitor.The coordinator is responsible to establish and maintain of system wireless networks,it also is responsible for forwarding monitoring center control command and uploading terminal nodes information.Terminal node controller is responsible for airfield lighting status data acquisition and control command analysis execution,including navigational lights detection of temperature,illumination and faults,and of its driver and guidance control.System uses mesh topology to organize network,increasing network coverage,configuring each terminal node have the routing function,while using LED light source instead of traditional airfield lighting source,and equipped with an independent power supply,it can reduce system power consumption,achieving low power consumption of system networking,flexible networking and self-healing networks and other function.Aiming at the application characteristic of airfield lighting and the control demand of temporary readiness airport;in this paper,we propose the overall design of the system.Based on Cluster-Tree routing algorithm,AODVjr routing algorithm and neighbor table routing algorithm,we use divided cluster design ideas to design a routing algorithm that suitable for system ad hoc network,and make routing simulation on the NS2 and analysis of results.Then according to the system features,using the TI's CC2530 RF microcontrollers,combined with CC2591 RF amplifier chip for hardware design of terminal controller,including the power supply circuit,driving circuit,sensor circuit and DEBUG interface circuit.Coordinator hardware circuit that includes STM32 main controller,RS485 bus interface circuit,power circuit and JTAG interface circuit.Lower computer software exploitation of the system is based on the Z-Stack protocol stack which can achieve the function of coordinator and terminal controller.By Microsoft Visual Basic 6.0,developing monitoring center to achieve airfield lighting control and real-time monitoring.Finally,by network communication distance test and self-organizing network test of the system to verify the feasibility and reliability of the system design,Node controller of system is able to meet the ad hoc networks coverage needs of airfield lighting,and is able to achieve navigational lights intelligent self-organizing network and low-power control,which has good prospects.