The Design And Realization Of Distributed Data Acquisition System For Large Bridge Health Monitoring

The system of health monitoring and data acquisition for large bridge is a new research direction in Construction and running of bridge at present, it includes the structure design analyze of bridge and data acquisition of automatic domain, according to the system's character of bridge monitoring, the distributed system is often used. With the sample of research in both here and abroad, a full-scale research of data acquisition has been made in the application of bridge health monitoring according to the development of domestic monitoring system.A front module of data acquisition has been designed based on the I/O of all kinds of sensors and requirement of collection. Two smart conditioners also have been designed according to the different requirement of the bridge structure and monitoring content, the smart conditioner send the data of sensor to the LAN and communicate with the long-distance station, this LAN system reduce the amount of work and improve the acquistion precision of data. The data acquisition system based on two smart conditions and the device of smart conditioner and its correlation have been analyzed. The other data acquisition project has been analyzed in the last chapter. This device has been used in the actual project.