Bridge health and safety monitoring Displacement sensor application ushers in the next outlet

 

In recent years, with the development of my country's economy, my country's bridge construction has ushered in an unprecedented development speed, providing a solid transportation foundation and transportation guarantee for economic construction.

 

With the improvement of bridge construction and transportation systems, bridges have also transitioned from large-scale construction to bridge monitoring and evaluation management. As time goes by, more and more bridges will reach or approach their service life. In addition, the long-term pressure of vehicles will cause structural damage and aging of bridges, especially large bridges. Once a collapse accident occurs, it will cause irreparable losses. Therefore, it is very important to monitor the health and safety of bridges.

 

In the past, the monitoring of the health and safety of bridges was mainly based on manual inspections. Although supplemented by corresponding detection equipment, it is difficult to achieve real-time, continuous and uninterrupted monitoring of bridges, and the monitoring method is not intelligent enough.

 

Nowadays, with the continuous development of the Internet of Things and smart cities, the health and safety monitoring of bridges and the maintenance of important structural parts are inseparable from the application of displacement sensors. By installing displacement sensors on bridges and remotely monitoring the safe operation of bridges through the Internet, it has been successfully applied in many places.

 

Wuhan City, Hubei Province installed more than 1,000 displacement sensors of 15 categories on 42 key bridges to conduct all-weather automatic monitoring of bridge operating environment, vehicle load, structural mechanical characteristics, existing defects and safety operation indicators; Hefei City, Anhui Province installed about 387 sensors on viaducts to monitor changes in bridge cable force, strain, inclination, displacement, deflection, acceleration, structural temperature, etc.; Qiqihar City, Heilongjiang Province installed electronic sensors on bridges to achieve scientific and dynamic monitoring and management of bridge maintenance; the wireless intelligent cable force sensor products developed by Tsinghua University have been used in the "National Trunk Road Network Monitoring Project-Key Bridge Monitoring" project initiated by the Ministry of Transport for three consecutive years.

 

With the advancement of displacement sensor technology, the development and application of some more reliable, accurate and cheap new linear displacement sensors have strongly promoted the development of bridge health and safety monitoring. For example, linear sensors, pull-rope displacement sensors, magnetostrictive displacement sensors, vibration measurement eddy current displacement sensors, etc. are increasingly being used in bridge health and safety monitoring.

 

With the rapid development of my country's infrastructure construction, the safety monitoring of bridges, tracks and other projects has received increasing attention. According to industry insiders, the maintenance of my country's bridges and other infrastructure will be a huge market of hundreds of billions of yuan per year in the future. According to relevant statistics, at present, 200 to 300 bridges in my country have adopted the installation of displacement sensors for safety monitoring, with costs ranging from millions to tens of millions of yuan.

 

At present, the speed of bridge construction in my country is much higher than that of other countries in the world. According to relevant data, the number of highway bridges in my country has exceeded 800,000, and the cumulative length of high-speed rail bridges has exceeded 10,000 kilometers. This means that sensors have a huge application market in bridge health and safety monitoring.

 

For bridge health and safety monitoring, the next outlet for displacement sensor applications has arrived. Domestic displacement sensor manufacturers should seize the opportunity, keep up with market demand, increase product technology research and development efforts, and share the 100 billion market cake of bridge health and safety monitoring.