Research On The Speed Control Technology Of Mobile Node Based On Cooperative Perception Mechanism

Wireless Sensor Network(WSN)is consisted by a large number of static or mobile nodes of sensors.It can send the information(temperature?humidity?light intensity and so on)of the monitored areas to the long-distance monitoring center by employing the sensor technologies,communication technologies,and computer technologies,et al,which can make monitors grasp the changes of information to make dynamic analysis,tracking and security maintenance according to the data,and can also offer theoretical basis for decision makers.In a given two-dimensional sensor network environment,a mobile node is deployed to make it cruise a preset trajectory at constant speed.The key problem to resolve is that the mobile node and the static node cooperatively perceive the information in the monitored area and the mobile node controls its own cruising speed.The main contributions of this paper are as follows:Firstly,the whole design of the controlling speed of the mobile node in WSN,which focuses on the hardware design of the mobile node system.Mobile nodes include sensor module,processor module,wireless Wifi communication module,RFID module,speed detection module,path identification module,motor drive module and power supply module,and the designs of the circuit schematics for each module are given.Secondly,the method of the cooperative perception of the mobile node and the static node,and the speed control of the mobile node are designed.What is mainly researched is the identification of static node identity information by the mobile node,and according to the static node working condition feedbacked by the monitoring center,the mobile node uses an incremental PID algorithm to control the cruising speed.If the status of static node of the feedback is abnormal,the mobile node slows down and compensates for the environmental information of the area monitored by the static node,thereby completing the cooperative perception between the mobile node and the static node;if the status of static node of the feedback works well,the mobile node accelerates the cruise,and rapidly passes through the monitored area of the static node.Lastly,by setting relevant simulation parameters,the incremental PID control speed of the mobile node is simulated and analyzed,and experimental tests are performed in a given two-dimensional sensor network environment.Analyzing the results of simulation and test,which further verifies the feasibility of radio frequency identification technology and PID control algorithm in the application of WSN.