Research On Structure And Performance Of Road Linear Perceptual Network Based On Smart Road Stud

Based on the comprehensive study of the wireless network structure at home and abroad,this paper studies and compares the advantages and disadvantages of various network communication means,and chooses Bluetooth as the communication technology of this system,which has the advantages of low power consumption,stable communication,fast transmission speed and low cost.With the help of smart road stud,the sensor nodes are deployed on the actual road to build the system.In this paper,aiming at the research of the linear structure of road and Bluetooth protocol stack,we design a three-tier system structure,design the routing and sensing nodes in the network system,and design the corresponding hardware and software development according to the functions it needs to complete.A multi-hop Bluetooth scattering network topology for road applications is designed,and the corresponding network transmission protocol,state machine mode switching settings and routing addressing schemes of network nodes are formulated.An application network access process using routing nodes as gateways is designed to enable the wireless network to interact remotely through the server side.The designed network topology is implemented concretely,and the basic data communication network is built.On this basis,the adaptive decision is made for the damage of some nodes.The network nodes automatically re-select the routing link according to their communication status,so as to avoid the blockage of the communication link caused by the damage of a node.The method of time frame expansion synchronization is designed to synchronize the internal time of each node.On the basis of time synchronization,the RF state machine is switched to achieve low power design.Aiming at the command issuance of the gateway,a time-sharing connection design applied to the non-continuity expansion of the linear network is adopted to design the low power consumption of the gateway communication.Finally,this paper combines the actual test to analyze the performance of the network,lays it out on the actual road and observes its induction effect.It proves that the power consumption of the Bluetooth wireless network designed in this paper can reach the level of mA under long-term work,and the self-power supply can meet the energy consumption of its nodes,and the actual effect of light guidance and traffic flow data acquisition has a good effect.