Omnidirectional optic fiber shape sensor for submarine landslide monitoring

Yang，Yang1,2; Cai，Weikang2; Wang，Yuanyuan3; Kong，Lingyu4; Xu，Jingping5; Yang，Jie4; Song，Zhangqi2

2025-01-15

10.1016/j.measurement.2024.115429

Measurement: Journal of the International Measurement Confederation   影响因子和分区

0263-2241

In-situ submarine landslide monitoring is imperative for ensuring the safety of ocean infrastructures, although it poses greater challenges compared to conventional landslide monitoring methods. In response to this need, we developed an omnidirectional optic fiber shape sensor (OFSS) and a self-contained submarine landslide monitoring system. Wavelength division multiplexing (WDM) and space division multiplexing (SDM) are used to build 10 omnidirectional curvature sensors with 3 fiber Bragg gating (FBG) arrays. Difference curvature demodulation algorithm is introduced to eliminate bending-irrelative effects. The omnidirectional curvature transmission matrix (OCTM) is obtained through calibration process with standard curvature molds. Frenet algorithm is used to recovery the shape. Laboratory experiments demonstrate OFSS's ability to monitor 3D shape in real time, achieving the deflection error of 0.23 % and the bending direction error of 0.06 rad in the simple bending shape recovery experiment. In the S-shape recovery experiment, the OFSS's deflection error is 0.77 % and the bending direction error is 0.04 rad. Subsequently, the system underwent testing in shallow water within a ship dock. In this experiment, the OFSS is successfully penetrated into the seabed and remained embedded in the soil for 90 min. The maximal shift observed at the end of the OFSS is 4.61×10m with the standard deviation of 9.95×10m, while the bending direction exhibited a maximal shift of 3×10 rad with the standard deviation of 7.51×10rad over the course of the 90-minute duration. These results validate the system's effectiveness in providing accurate and reliable in-situ monitoring of submarine landslide.

Fiber Bragg gating Optical fiber shape sensor Submarine landslide monitor

SCI

英语

其他

ENGINEERING

2-s2.0-85201668242

Scopus

1.Harbin Institute of Technology,Harbin,150080,China
2.College of Innovation and Entrepreneurship,Southern University of Science and Technology,Shenzhen,518055,China
3.Peng Cheng Laboratory,Shenzhen,518055,China
4.Sichuan Jiuzhou Electric Group Co.,Ltd,Mianyang,621000,China
5.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Yang，Yang,Cai，Weikang,Wang，Yuanyuan,et al. Omnidirectional optic fiber shape sensor for submarine landslide monitoring[J]. Measurement: Journal of the International Measurement Confederation,2025,239.

Yang，Yang.,Cai，Weikang.,Wang，Yuanyuan.,Kong，Lingyu.,Xu，Jingping.,...&Song，Zhangqi.(2025).Omnidirectional optic fiber shape sensor for submarine landslide monitoring.Measurement: Journal of the International Measurement Confederation,239.

Yang，Yang,et al."Omnidirectional optic fiber shape sensor for submarine landslide monitoring".Measurement: Journal of the International Measurement Confederation 239(2025).