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The Sensor Black Technology Behind The Hong Kong-zhuhai-macao Bridge

Feb 15, 2019

The much-anticipated hong kong-zhuhai-macao bridge, the world's longest sea bridge, is set to become the focus of global attention. With a total length of about 55 kilometers, the hong kong-zhuhai-macao bridge connects Hong Kong, zhuhai and Macao closely. It is the first large-scale cross-sea transportation project jointly built by guangdong, Hong Kong and Macao. The hong kong-zhuhai-macao bridge took 15 years to complete after 6 years of preparation and 9 years of construction. There are many black technologies behind the completion of the bridge, among which advanced sensor technology is one of the bases to ensure the normal operation and safety of the bridge.

Inclination sensor, also known as inclinometer, inclinometer, level, inclinometer, is often used in the system of horizontal Angle change measurement, level from the past simple bubble level to the current electronic level is the result of the development of automation and electronic measurement technology.As a testing tool, it has become an indispensable important measuring tool in bridge erection, railway laying, civil engineering, oil drilling, aviation and navigation, industrial automation, intelligent platform, mechanical processing and other fields.Electronic level is a very accurate tool for measuring small angles. It can be used to measure the inclination of the measured plane relative to the horizontal position, the parallelism of the two parts and the verticality.

According to the editor of OFweek electronic engineering website, since the hong kong-zhuhai-macao bridge needs many long and heavy concrete sunken pipes, which are transported to the construction area and installed in the seabed foundation groove, these sunken pipes are like the big pendulum of the seabed, which needs to accurately measure the pendulum in the direction of left and right, up and down as well as the inclination.Because of the depth of the sea, the ultra-low frequency of the submerged pipe movement is impossible to detect without the extremely high sensitivity of the sensor.

Finally, a domestic sensor technology companies, analyzing the deep water pipe joint docking problem decided to adopt the method of monitoring the union movement posture to ensure the smooth operation of the pipe joint and docking, in the before and after the end of the pipe joint has test points respectively, and has many backup teams, in the front of the key sensors, ensure accuracy of test signal, monitoring the deep socket for a long period of small amplitude motion belongs to the ultra-low frequency vibration.It is reported that this is the most advanced micro - mechanical gyroscope and high - precision tilt sensor.

On the hong kong-zhuhai-macao bridge set up all kinds of sensors, use them within the tunnel on wind speed, temperature, humidity, pressure, differential pressure, as well as carbon dioxide, nitrogen oxide and real-time monitoring parameters such as the concentration of the particles, according to rough statistics, hong kong-zhuhai-macao bridge with the help of at least one thousand kinds of relevant sensors, gas sensors, temperature and humidity sensor, pressure sensor, laser sensor is essential, together they constitute the hong kong-zhuhai-macao bridge of high precise perception system.