In the past decade, high-rise buildings have developed rapidly, and some architectural structures have pursued unique styles, so they have become more irregular. More and more engineers are concerned about the safe operation and maintenance of these structures during their service life. Many structures are equipped with various sensors during their construction and maintenance phases to monitor their structural performance.
For tall buildings, horizontal displacement and acceleration are two important types of structural response, especially horizontal displacement. The horizontal displacement of tall buildings is an important indicator for assessing structural performance and safety. If the horizontal displacement of the structure is too large, it will result in an unsafe structure.
Therefore, in order to study the technical feasibility of measuring and controlling the horizontal displacement of tall buildings, a large number of studies have been carried out. There are several techniques for monitoring structural displacement, including accelerometers, global positioning systems (GPS), vision-based systems, and tilt sensors.
The tilt sensor mainly provides the measured value of the tilt, which can be converted into a lateral shift. When the displacement value exceeds the safe value, attention should be paid to take appropriate measures in advance. According to the mechanical properties of the reinforcement layer, a tilt sensor can be reinforced every 15 layers, and two tilt sensors are added between each two reinforcement layers. This inertial attitude sensor based technology provides a new approach to future building structural health monitoring.
Bewis's high-precision dual-axis tilt sensor BWM826 has been used to monitor the horizontal displacement of high-rise buildings. It has also played an important role in the repair of ancient buildings and the monitoring of dangerous buildings. The measurement accuracy is up to 0.005°, the data stability is high, the temperature drift is very small, the protection grade is IP67, it can be directly installed outdoors, fit the steel frame structure, and it is easy to dismantle and observe the geometric deformation of the high-rise building in real time. Bewis has also designed a variety of inertial attitude sensor power supply solutions, ultra-low power consumption, intelligent wake-up, to provide long-term monitoring.
In the process of using the tilt sensor, the horizontal displacement automatic deformation monitoring system also shows the following characteristics:
1. Integrate data collection and analysis and remote monitoring to meet the different needs of staff in monitoring and vision.
2. Improve monitoring efficiency and reduce personnel.
3. Management can cover the whole process of monitoring, and the efficiency of information feedback is greatly improved.