Design and Practice of the Automatic Monitoring System for the Bridge´s Structure Security in Active Service

The secure monitoring problem of the bridge´s structure in active service is the hotspot problem to which the whole bridge field is paying attention all the time. The sensor can obtain the stress and the strain´s situation of the bridge´s parts, but the strain is only a relative one. How to obtain the integral and absolute strain information of the bridge´s structure is a hard nut to crack. On the basis of the cause supra, the automatic monitoring system about the bridge´s structure security in active service based on the RTK-GPS technology and the measuring robot has been developed. Load Response Spectrum Method, an effective method to diagnose the bridge´s health status, which is based on the monitoring data´s characteristic of the two automatic monitoring technologies. The basic principle, monitoring method and monitoring process of these two automatic monitoring technologies are introduced.