Prestressed steel strand duct grouting detection method based on thermal effect and optical fiber sensing
By laying fiber bundles in prestressed steel strands and combining thermal effects with fiber optic sensing technology, the problems of insufficient accuracy and real-time performance of traditional detection methods have been solved, achieving high-precision and low-cost grout compaction detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ERCHU CO LTD OF CHINA RAILWAY TUNNEL GRP
- Filing Date
- 2026-05-13
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional methods for detecting the density of grouting in prestressed steel strands suffer from insufficient accuracy, inability to track the grouting process in real time, and high equipment costs.
By employing a method based on thermal effects and fiber optic sensing, fiber optic bundles are laid in prestressed steel strands, and fiber optic sensors are used to collect reflected wavelength signals in real time. Combined with a PID control algorithm, the voltage difference is dynamically adjusted to achieve precise positioning and temperature control of grouting voids and compacted sections.
It improves detection accuracy, enables real-time feedback on grouting quality, reduces equipment costs and manual intervention, and enhances system reliability and real-time detection.
Smart Images
Figure CN122409588A_ABST