Fiber optic temperature sensor, Intelligent monitoring system, Distributed fiber optic manufacturer in China
 |
 |
 |
The Importance of Monitoring Stress Sensors
As the modernization process continues, stress sensing is an extremely important issue in the safety monitoring of the entire construction process in many monitoring systems ranging from large-scale building structures to some fine engineering structures. As is well known, the traditional method of measuring stress is usually carried out with the continuation of modernization. In many monitoring systems ranging from large-scale building structures to some fine engineering structures, stress sensing is an extremely important issue in the safety monitoring of the entire construction process. As is well known, the traditional method of measuring stress usually relies on the resistance value reflected by the resistance strain gauge and the corresponding relationship between stress to detect engineering construction. Although the resistance strain gauge is inexpensive, its adaptability to the external environment is not good, especially susceptible to the influence of electromagnetic fields. At the same time, it cannot work in many corrosive environments, which is a significant deficiency for stress sensors used in engineering detection. And traditional stress sensors can only perform single point measurements.
Advantages of Fiber Optic Stress and Strain Sensing Monitoring
Fiber optic stress sensors have the advantages of small size, light weight, high accuracy, no electromagnetic interference, and corrosion resistance of general fiber optic sensors. Therefore, various fiber optic stress sensors have emerged in the development process of stress sensors. And many of them have already been commercialized. There are already many types of stress sensing structures or devices based on optical fibers. For example, sensors based on fiber micro bending structures and Fabry Perot fiber structures can be applied in many places.
Strain is an important physical property of materials and structures. The stress state of large-scale structures and engineering plays a decisive role in their safety and reliability. Accurate, timely, and comprehensive understanding of the structural health status is necessary to make a correct evaluation and avoid the occurrence of major accidents. Fiber Bragg Grating is considered one of the most promising optical passive sensor components, which has the characteristics of small size, flexibility and bendability, intrinsic safety, and strong adaptability to harsh environments. Therefore, it is necessary to design a stress detection device based on fiber optic sensing that is structurally stable and easy to install.
The fiber optic stress-strain sensing monitoring system integrates Brillouin scattering technology, optical time-domain reflection technology, high-frequency signal acquisition technology, and other technologies to achieve temperature/stress monitoring for special optical cables in different application scenarios. The fiber optic stress monitoring system has extensive applications and significant advantages in the health diagnosis of large buildings such as bridges, embankments, and rail transit, as well as in the safety monitoring of oil and gas, power grids, and national defense and aerospace fields.
Application of Fiber Optic Stress Sensor
• Safety monitoring of civil engineering structures such as bridges, dams, tunnels, oil pipelines, and buildings
High voltage cable stress monitoring
Geological disaster prevention monitoring such as landslides and debris flows
• Submarine cable laying and operation monitoring
Characteristics of Fiber Optic Sensor Products
Distributed detection
A sensing point can be set every certain distance on the sensing optical cable, with a total number of sensing points reaching several tens of kilometers, providing comprehensive and uninterrupted sensing information of the tested structure without any blind spots.
Long distance monitoring
The sensing monitoring distance is long, which can achieve full coverage monitoring of large buildings such as engineering structures.
High spatial resolution
High spatial resolution, high-precision positioning of abnormal alarm points.
High detection accuracy
The temperature measurement accuracy of fiber optic sensors is high, and the strain testing accuracy is micro strain, which can sensitively sense small changes in the temperature and strain of the tested structure.
Anti electromagnetic interference
The system modulates the signal to demodulate the strain information in the sensing optical cable, which is not affected by electromagnetic interference and can maintain signal stability in actual engineering monitoring environments.
