Application of sensor in bridge tension detection

Bridge engineering is an important aspect of infrastructure construction, and an important link to link transportation and promote economic development. Theodolite, subsidence meter and other high integration measuring instruments can carry out continuous scanning on multiple measuring points of the bridge, timely warning of some small cracks, displacement changes and other diseases. However, it is difficult to detect all measuring points synchronously, and it is impossible to warn large shape variables. In this case, a displacement sensor is needed.

Displacement sensor is a kind of contact type measuring instruments, sensors, direct contact with the measuring point when using the sensor converts the displacement variation in time to electrical signals transmitted to monitoring and control center, the control system of metering predict bridge after operation condition, which can realize the measurement of synchronous acquisition, comparison, data storage, etc., for scientific management and monitoring of bridge diseases to provide scientific basis, can also be collected signal transmission to the Internet, is the most basic unit of the Internet of things, and all kinds of bridge monitoring system applied at present most measurement instruments. However, most of the precision displacement sensors can only be measured in contact, and for some inaccessible observation points, most of the bridge transverse displacement changes are difficult to effectively monitor because of the sensor installation problem.

Regardless of the instrument as a means of detection, the bridge monitoring system should follow the principle of simple, practical, economic, reliable, should according to the layout of bridge construction and maintenance management requirements in terms of monitoring, monitoring should be closely related to the bridge structure safety, the main monitoring typical vulnerable structure, must implement the important structure and the structure of the daily maintenance is difficult to check or not check, etc., from the perspective of dynamic, static, and the durability of monitoring stations to carry on the design, makes every effort with the least amount of sensors and the minimum quantity of data acquisition monitoring system.

Basically any infrastructure can be upgraded with sensors to make it more intelligent and use big data technology for real-time monitoring, analysis and visualization. The application of intelligent sensors on Bridges and levees can provide modern means for remote monitoring, rapid response and command of emergency rescue for flood control, and provide comprehensive and reliable scientific basis for government departments to make decisions. It also marks that flood control and daily management have reached a new level in the digital field.