Application

Application of Displacement Sensor in Bridge Inspection

In recent years, automatic monitoring systems have been deployed and put into use on major roads, bridges and large buildings in various places, and a large amount of real-time data, images and other information have been collected, providing strong support for the daily monitoring and maintenance of roads, bridges and large buildings. The monitoring system mainly includes: temperature sensors, wind speed sensors, displacement sensors, pressure sensors, inclinometers, vibration sensors and many other types of sensors. The data is processed centrally, and the health status of the monitoring target is diagnosed. When the monitoring target is abnormal, the staff can take reasonable and effective measures in time to ensure the safety of the monitoring target.

Bridge inspection and maintenance mainly focus on bridge load, vibration, crack deformation of main beam and pier main beam, and deformation of traction rope. The main girder is the main force-bearing structure of the upper structure of the bridge, which not only bears the bending moment, but also bears the action of various horizontal component forces, and is in a state of combined force. The most common disease of the main girder and bridge deck during the bridge operation stage is the cracks in the main girder web and roof. The main manifestations of bridge pier diseases are pier misalignment and concrete cracks. There are many reasons for cracks, such as loading, concrete composition, temperature changes, concrete shrinkage and creep, uneven settlement of foundations, and corrosion of steel bars. Displacement sensors can provide scientific basis for bridge load-bearing and health status assessment by detecting displacement changes at corresponding positions, and can also make early warnings in time before bridge disasters occur. pivotal role.

Bridge detection commonly used displacement sensors: