Research on the road collapse detection method of distributed optical fiber sensing technology

The purpose of this paper is to explore the application of distributed fiber sensing technology in road collapse detection to improve the efficiency and accuracy of road safety monitoring. The working principle of distributed optical fiber sensing technology is deeply analyzed, that is, the characteristics of the scattered light phase in the optical fiber change with the ambient temperature or the optical fiber deformation, and the optical signal is restored to the vibration signal through the optical fiber modulation and demodulation equipment, and the computer algorithm is used for signal processing. Because the vibration signal has its own characteristics, a "Soundprint Library" is built for these specific scenarios to analyze the road vibration, strain and temperature signals. In the road cavity or destructive construction, the vibration, strain and temperature signal of the optical fiber will show significant differences. With the help of the computer algorithm, the comparison and analysis of the "Soundprint Library" can accurately identify the abnormal state of the road. Distributed fiber sensing technology shows significant advantages in the field of road collapse detection with its high precision, strong real-time and excellent anti-interference capability. The technology also has broad application potential and practical value, and can provide strong support for road safety detection. Through practical case analysis, the effectiveness and reliability of distributed fiber sensing technology in road collapse detection are further verified. With the continuous development of technology, distributed fiber sensing technology on the road. The application prospect in the field of security detection will be even broader.