公开(公告)号：US11551341B2

公开(公告)日：2023-01-10

申请号：US16765871

申请日：2018-03-06

Applicant: SOUTHEAST UNIVERSITY

Inventor： Jian Zhang ,  Futao Ni

IPC: G06T7/00 ,  G06T7/70 ,  G06T5/00 ,  G06T5/20 ,  G06T7/80 ,  G06T7/136 ,  G06T7/62 ,  G01B11/02 ,  G01N33/38 ,  G06T11/00

Abstract: The present invention discloses a method and device for automatically drawing structural cracks and precisely measuring widths thereof. The method comprises a method for automatically drawing cracks and a method for calculating widths of these cracks based on a single-pixel skeleton and Zernike orthogonal moments, wherein the method for automatically drawing cracks is used to rapidly and precisely draw cracks in the surface of a structure, and the method for calculating widths of these cracks based on a single-pixel skeleton and Zernike orthogonal moments is used to calculate widths of macro-cracks and micro-cracks in an image in a real-time manner.

公开(公告)号：US20250139331A1

公开(公告)日：2025-05-01

申请号：US18576376

申请日：2023-11-06

Applicant: Southeast University

Inventor： Jian Zhang ,  Yixuan Chen ,  Feiyu Wang ,  Chenhao Gao

IPC: G06F30/23 ,  G01M5/00 ,  G06F111/10 ,  G06F119/14

Abstract: The present invention relates to a targeted perception-oriented twin substructure interaction method and system, and application. The method includes: acquiring multivariate inspection and monitoring data and finite element influence line data of a main structure; solving, on the basis of the inspection and monitoring data and the finite element influence line data of a non-focus region, boundary conditions of a focus region; establishing, for the focus region, a refined twin substructure finite element model, and correcting material properties of the refined twin substructure finite element model on the basis of the inspection and monitoring data and the finite element influence line data of the focus region; and calculating a correction force on the basis of the boundary conditions of the focus region and the material properties, and using the correction force as an equivalent external load to act on nodes of a global finite element model.

公开(公告)号：US12223632B2

公开(公告)日：2025-02-11

申请号：US17755086

申请日：2021-05-08

Applicant: SOUTHEAST UNIVERSITY

Inventor： Jian Zhang ,  Zhili He ,  Shang Jiang

IPC: G06T7/00 ,  B63B1/12 ,  B63B35/00 ,  B63B45/04 ,  B63B79/40 ,  G01M5/00 ,  G06T7/73 ,  H04N23/56

Abstract: The invention discloses an intelligent detection method for multiple types of faults for near-water bridges and an unmanned surface vehicle. The method includes an infrastructure fault target detection network CenWholeNet and a bionics-based parallel attention module PAM. CenWholeNet is a deep learning-based Anchor-free target detection network, which mainly comprises a primary network and a detector, used to automatically detect faults in acquired images with high precision. Wherein, the PAM introduces an attention mechanism into the neural network, including spatial attention and channel attention, which is used to enhance the expressive power of the neural network. The unmanned surface vehicle includes hull module, video acquisition module, lidar navigation module and ground station module, which supports lidar navigation without GPS information, long-range real-time video transmission and highly robust real-time control, used for automated acquisition of information from bridge underside.

公开(公告)号：US11294073B2

公开(公告)日：2022-04-05

申请号：US16626570

申请日：2018-05-04

Applicant: SOUTHEAST UNIVERSITY

Inventor： Shuguo Pan ,  Wang Gao ,  Yanheng Wang ,  Chengfa Gao ,  Qing Wang ,  Ruicheng Zhang ,  Jian Zhang ,  Guoliang Liu

IPC: G01S19/44 ,  G01S19/07 ,  G01S19/04 ,  G01S19/25 ,  G01S19/32 ,  G01S19/41

Abstract: A tightly combined GPS/BDS carrier differential positioning method is provided. The method comprises: using a GPS as a reference system to construct a GPS intra-system double-difference ionosphere-free combination model and a GPS/BDS inter-system double-difference ionosphere-free combination model; selecting a BDS reference satellite to re-parameterize an ambiguity of a GPS/BDS inter-system double-difference ionosphere-free combination and perform parameter decorrelation, estimating an ionosphere-free combination carrier differential inter-system bias in real time, and performing reference conversion on the ionosphere-free carrier inter-system bias to realize a continuous estimability of the ionosphere-free carrier differential inter-system bias in necessary; and finally, using ambiguity-fixed base carrier observations to form the ionosphere-free combination and performing tightly combined positioning on the inter-system double-difference ionosphere-free combination based on the estimated ionosphere-free carrier difference inter-system bias.

公开(公告)号：US10753827B2

公开(公告)日：2020-08-25

申请号：US16316351

申请日：2016-08-26

Applicant: SOUTHEAST UNIVERSITY

Inventor： Jian Zhang ,  Zhao Chen ,  Wenju Zhao ,  Liming Zhou

IPC: B60C23/04 ,  G01M17/02 ,  G01M17/013 ,  G01L5/00

Abstract: A method and system for measuring vertical wheel impact force in real-time based on tire pressure monitoring is provided by the present invention. The system mainly includes the four modules, namely a tire pressure derotation preprocessing, a tire pressure-wheel force system identification, a calibration method, and an integrated device for tire pressure-wheel force measurement. The method uses the integrated device to collect tire pressure data in real-time. The corresponding vertical wheel impact force is obtained through the derotation preprocessing and the tire pressure-wheel force system identification, and is calibrated according to the calibration method. The present invention provides an efficient, accurate, and highly adaptable wheel force measurement solution in the theoretical aspect and device aspect, which meets the requirements for the quick evaluation of the bridge health condition. Also, the present invention has a great potential in the fields such as road safety diagnosis, automobile performance related design, etc.