Patents by Inventor Dinghan LI

Dinghan LI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and system for obtaining fluid flow directions of tundish water model
    Patent number: 12450757
    Abstract: A method and a system for obtaining fluid flow directions of a tundish water model are provided, and the method includes the following steps: building the tundish water model with a preset similarity ratio with a tundish prototype; carrying out an ink diffusion experiment in the tundish water model, and shooting a video of an ink diffusion process; carrying out a binarization processing on the video of the ink diffusion process frame by frame to obtain binarized images; obtaining a time grayscale map based on grayscale values of the binarized images; obtaining a velocity vector map of the tundish water model based on grayscale gradients of the time grayscale map; and obtaining a moving direction of the ink based on the velocity vector map, and obtaining a flowing direction of fluid in the tundish water model based on the moving direction.
    Type: Grant
    Filed: January 3, 2025
    Date of Patent: October 21, 2025
    Assignees: North China University of Technology, University of Science and Technology Beijing, Northeastern University
    Inventors: Lifeng Zhang, Haojian Duan, Dinghan Li, Ying Ren
  • Method and system for analyzing global average grayscale change of tundish ink tracing experiment
    Patent number: 12283058
    Abstract: A method analyzes global average grayscale change of tundish ink tracing experiment. The method includes the following steps: building a water model based on a prototype size and production parameters of a tundish; carrying out experiments by using the water model to obtain a video file of the ink tracing; processing the video file and extracting a characteristic curve of a global average grayscale changing with the time; analyzing the characteristic curve, and extracting a global peak grayscale time, a global tracer residual volume and a global emptying time as indicators for evaluating a tundish structure and flow characteristics of the tundish structure.
    Type: Grant
    Filed: July 26, 2024
    Date of Patent: April 22, 2025
    Assignees: North China University of Technology, University of Science and Technology Beijing
    Inventors: Lifeng Zhang, Haojian Duan, Dinghan Li, Yuexin Zhang, Wei Chen, Ying Ren
  • METHOD AND SYSTEM FOR ANALYZING GLOBAL AVERAGE GRAYSCALE CHANGE OF TUNDISH INK TRACING EXPERIMENT
    Publication number: 20250111521
    Abstract: A method analyzes global average grayscale change of tundish ink tracing experiment. The method includes the following steps: building a water model based on a prototype size and production parameters of a tundish; carrying out experiments by using the water model to obtain a video file of the ink tracing; processing the video file and extracting a characteristic curve of a global average grayscale changing with the time; analyzing the characteristic curve, and extracting a global peak grayscale time, a global tracer residual volume and a global emptying time as indicators for evaluating a tundish structure and flow characteristics of the tundish structure.
    Type: Application
    Filed: July 26, 2024
    Publication date: April 3, 2025
    Inventors: Lifeng ZHANG, Haojian DUAN, Dinghan LI, Yuexin ZHANG, Wei CHEN, Ying REN