Research On Wireless Data Acquisition System Of Bridge Bearing Working Condition

The damage of the bridge structure is prone to cause major accidents,so it is very important to collect the working condition information of its key parts in real time,especially for real-time working condition data collection of the important force transmission devices of the bridge.The stress state of the bridge structure can be reliably obtained through the pressure data of the bearing,and the damage of the bearing due to excessive stress can be prevented.However,at present,the domestic working data of bridge supports is still mainly collected manually,and there are shortcomings such as low degree of node systemization,easy damage of lines,and complicated wiring installation.To this end,this paper proposes a wireless support pressure data acquisition network system based on ZigBee protocol.Compared with the traditional acquisition mode,it has the advantages of high reliability and low cost.First,based on the deformation of the bearing on the bridge,the design requirements of the pressure acquisition system are analyzed to determine the overall design of the system.The CC2530 processor and peripheral circuits are designed,and the hardware implementation scheme of each module of the system is given.Secondly,in order to ensure the stability and reliability of the acquisition system,in view of the shortcomings of low connectivity caused by the ZigBee technology address allocation mechanism,a connectivity enhancement algorithm was mainly designed to implement topology reconstruction through link changes Simulation experiments show that the connectivity of this algorithm is significantly higher than that of ECS algorithm and ZigBee node joining algorithm,and it has good practicability.Then,the software design of the system is combined with the Z-Stack protocol stack to realize the ZigBee networking,and the data management subsystem is designed to display and save the pressure data of the support in real time.Finally,by testing each part of the designed module,the test results verify the feasibility of the system design.