公开(公告)号：US20230154653A1

公开(公告)日：2023-05-18

申请号：US17841416

申请日：2022-06-15

Applicant: Nanjing University

Inventor： Yixin Zhang ,  Fei Xiong ,  Xuping Zhang ,  Chi Zhang ,  Long Chen ,  Shun Wang ,  Xiaohong Chen ,  Feng Wang

IPC: H01B11/22 ,  G02B6/44 ,  G01L1/24 ,  G01K11/32

CPC classification number: H01B11/22 ,  G02B6/4427 ,  G01L1/242 ,  G01K11/32

Abstract: The invention discloses an underwater umbilical cable which is capable of temperature and vibration measuring and three-dimensional shape reconstruction, wherein underwater umbilical cable is used to connect underwater equipment and aquatic equipment; the underwater umbilical cable comprises an outer sheath, armored steel wires, an inner sheath, a power cable, a communication optical cable, a steel pipe, three strain measuring optical fibers, three temperature measuring optical fibers, a distributed optical fiber strain interrogator, a distributed optical fiber temperature interrogator and a processor. The invention can collect the operation status data of the umbilical cable for a long time. The collected data is highly objective, can truly reflect the real-time operation status of the umbilical cables, and plays an important role in guaranteeing the long-term submarine oil and gas exploitation.

公开(公告)号：US12117361B2

公开(公告)日：2024-10-15

申请号：US17908248

申请日：2022-03-23

Applicant: NANJING UNIVERSITY

Inventor： Yixin Zhang ,  Xiaohong Chen ,  Xuping Zhang ,  Shuai Tong ,  Lei Liang ,  Yiming Wan ,  Feng Wang

IPC: G01M11/00

CPC classification number: G01M11/3145

Abstract: A method for suppressing coherent and polarization-induced fading by simultaneous monitoring of loss and vibration is provided. By using merely common single-mode sensing fibers, the polarization diversity-based measurement method solves the conflict between Φ-OTDR and COTDR in terms of polarization state. In addition, the method not only achieves a better coherent fading noise suppression effect but also enhances the capability of recognizing small loss events in the monitoring of loss parameters. Meanwhile, the method can suppress the influence of coherent fading on the phase demodulation of Φ-OTDR and reconstruct a vibration signal with high fidelity in the monitoring of perturbation parameters, which can effectively reduce the error rate of external perturbation warning.

公开(公告)号：US11804316B2

公开(公告)日：2023-10-31

申请号：US17841416

申请日：2022-06-15

Applicant: Nanjing University

Inventor： Yixin Zhang ,  Fei Xiong ,  Xuping Zhang ,  Chi Zhang ,  Long Chen ,  Shun Wang ,  Xiaohong Chen ,  Feng Wang

IPC: G01K11/32 ,  G02B6/44 ,  H01B11/22 ,  G01L1/24

CPC classification number: H01B11/22 ,  G01K11/32 ,  G01L1/242 ,  G02B6/4427

Abstract: The invention discloses an underwater umbilical cable which is capable of temperature and vibration measuring and three-dimensional shape reconstruction, wherein underwater umbilical cable is used to connect underwater equipment and aquatic equipment; the underwater umbilical cable comprises an outer sheath, armored steel wires, an inner sheath, a power cable, a communication optical cable, a steel pipe, three strain measuring optical fibers, three temperature measuring optical fibers, a distributed optical fiber strain interrogator, a distributed optical fiber temperature interrogator and a processor. The invention can collect the operation status data of the umbilical cable for a long time. The collected data is highly objective, can truly reflect the real-time operation status of the umbilical cables, and plays an important role in guaranteeing the long-term submarine oil and gas exploitation.