Application of Linear Displacement Sensor in Bridge Inspection
Bridge engineering is an important aspect of the country's infrastructure construction, as well as an important link connecting local transportation and promoting economic development. After the bridge is built, due to the influence of factors such as load, climate, environment, vibration, cable force and stress changes, the bridge structure materials will gradually be corroded and aged, and the strength and rigidity will gradually decrease.
Large-span bridges are more affected by the above factors, which will not only shorten the service life of the bridge, but also lay a great hidden danger for the personal safety of pedestrians. Therefore, real-time monitoring of the health of the bridge and safety assessment on this basis is an important part of daily maintenance.
With the advancement of society and the development of technology, people gradually introduce cutting-edge technologies such as sensor technology, computer technology, and communication technology into the bridge monitoring system, which initially realizes automatic monitoring and early warning functions, and can be used for bridge structural damage and condition for a long time. Evaluation to meet the needs of bridge maintenance management and operation, provide theoretical basis for scientific management of bridges, etc., while taking into account economic and social benefits. The main instruments currently used for bridge monitoring include: theodolite settlement instrument, displacement sensor, acceleration sensor and other test methods.
Highly integrated measuring instruments such as theodolite and settlement instrument can continuously scan multiple measuring points of the bridge to early warn some small cracks, displacement changes and other diseases in time. However, it is difficult to simultaneously detect various measuring points, and it is impossible to warn large deformation variables.
The linear displacement sensor is a contact measuring instrument. When in use, the sensor is in direct contact with each measuring point. The sensor converts the displacement change into an electrical signal and transmits it to the monitoring and control center in time. After the control system collects and measures, it can predict the operating condition of the bridge. Realize the simultaneous acquisition, comparison, data storage, etc. of each measurement, provide a scientific basis for scientific management and monitoring of bridge diseases, and can also transmit the signals collected by the system to the Internet. It is the most basic component of the Internet of Things, and it is also the current monitoring of various bridges. The most widely used measuring instrument in the system. However, most precision displacement sensors can only be contacted for measurement, and cannot be measured for some inaccessible observation points. Most of the bridge body's lateral displacement changes are difficult to effectively monitor because of sensor installation problems.
Acceleration sensors are also partly used in bridge monitoring systems, but the measurement accuracy of acceleration sensors is low, and the measurement data needs to be processed by calculations to be converted into displacement values. In addition, the acceleration displacement sensor has a relatively poor effect on low-frequency static displacement monitoring. The vibration frequency of large bridges is low, and it is difficult to guarantee that the collected data will not be distorted.
No matter what instrument is used as the detection method, the bridge monitoring system should follow the principles of simplicity, practicality, economy, and reliability. Monitoring points should be deployed according to the bridge structure and maintenance management requirements. The monitoring points should be closely related to the safety of the bridge structure.
The above is the displacement sensor related information introduced by Shensi Measurement and Control. If you want to know more related product information, you can call our hotline 18988775303, click on our official website to consult us online in real time, we will have professional staff Answer for you.
Shenzhen Miran Technology Co., Ltd. is a high-tech enterprise specializing in sensor technology research and development, design, manufacturing and sales. The company has experts in sensor technology for nearly 20 years, brings together a number of experienced engineers and technicians, has a strong technical strength in independent research and development of high-tech products, and has fully functional high-precision production and testing equipment. Provide displacement sensor products and solutions.
The company's main products are LVDT displacement sensors, magnetostrictive displacement sensors, eddy current displacement sensors, pull-rope displacement sensors, resistive linear displacement sensors, magnetostrictive liquid level sensors, tilt displacement sensors, angle displacement sensors, and ultrasonic displacement sensors and many more. Products are widely used in machinery manufacturing, automobiles, metallurgy, petroleum, chemical engineering, scientific research institutes, aerospace, transportation and construction.