Patents Assigned to HYDROSEM
  • Patent number: 11609966
    Abstract: Disclosed is a device and a method for measuring stream water depth in real-time through positioning data filtering to ensure the reliability of the measured water depth data even when the stream water depth measurement data is filtered and applied to a small stream having a small basin area and a steep slope. The device for measuring stream water depth in real-time through positioning data filtering includes: a measuring part for measuring the water depth of a stream to be measured; a positioning data filtering part for filtering the water depth data measured by the measuring means by a local linear regression-based bivariate scatterplot smoothing technique through elastic bandwidth application; and a water depth calculating part for calculating a water depth of the stream to be measured by using the positioning data filtered by the positioning data filtering part, and minimizing the uncertainty of the water depth measurement.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: March 21, 2023
    Assignees: HYDROSEM, REPUBLIC OF KOREA (NATIONAL DISASTER MANAGEMENT RESEARCH INSTITUTE)
    Inventors: Seo Jun Kim, Byung Man Yoon, Ho Jun You, Dong Su Kim, Tae Sung Cheong, Jae Seung Joo, Hyeon Seok Choi
  • Patent number: 11353354
    Abstract: Disclosed is a system for automatically measuring a discharge in real time based on a CCTV image. The system includes: a water depth measurement device filtering water depth data measured by a measurement means with a local linear regression-based bivariate scatterplot smoothing technique through flexible bandwidth application to calculate the water depth of a stream; an image acquisition device acquiring a continuous image of a flow speed measurement side of the stream; an image analysis PC using an image of the image acquisition device to measure the surface flow speed in real time and receiving a measured water depth from the water depth measurement device to measure the discharge in real time with cross-section data; and a discharge calculation and management server for transmitting and displaying a real-time discharge measurement result based on a web.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: June 7, 2022
    Assignees: HYDROSEM, REPUBLIC OF KOREA (NATIONAL DISASTER MANAGEMENT RESEARCH INSTITUTE)
    Inventors: Seo Jun Kim, Byung Man Yoon, Ho Jun You, Dong Su Kim, Tae Sung Cheong, Jae Seung Joo, Hyeon Seok Choi
  • Patent number: 11200684
    Abstract: Disclosed is a river flow velocity measurement device using optical flow image processing, including: an image photographing unit configured to acquire consecutive images of a flow velocity measurement site of a river; an image conversion analysis unit configured to dynamically extract frames of the consecutive images in order to normalize image data of the image photographing unit, image-convert the extracted frames, and perform homography calculation; an analysis region extracting unit configured to extract an analysis region of an analysis point; a pixel flow velocity calculating unit configured to calculate a pixel flow velocity using an image in the analysis region of the analysis point extracted by the analysis region extracting unit; and an actual flow velocity calculating unit configured to convert the pixel flow velocity calculated by the pixel flow velocity calculating unit into an actual flow velocity.
    Type: Grant
    Filed: November 29, 2018
    Date of Patent: December 14, 2021
    Assignees: HYDROSEM, REPUBLIC OF KOREA (NATIONAL DISASTER MANAGEMENT RESEARCH INSTITUTE)
    Inventors: Seo Jun Kim, Byung Man Yoon, Ho Jun You, Dong Su Kim, Tae Sung Cheong, Jae Seung Joo, Hyeon Seok Choi
  • Publication number: 20210356584
    Abstract: Disclosed is a device and a method for measuring stream water depth in real-time through positioning data filtering to ensure the reliability of the measured water depth data even when the stream water depth measurement data is filtered and applied to a small stream having a small basin area and a steep slope. The device for measuring stream water depth in real-time through positioning data filtering includes: a measuring part for measuring the water depth of a stream to be measured; a positioning data filtering part for filtering the water depth data measured by the measuring means by a local linear regression-based bivariate scatterplot smoothing technique through elastic bandwidth application; and a water depth calculating part for calculating a water depth of the stream to be measured by using the positioning data filtered by the positioning data filtering part, and minimizing the uncertainty of the water depth measurement.
    Type: Application
    Filed: November 29, 2018
    Publication date: November 18, 2021
    Applicants: HYDROSEM, REPUBLIC OF KOREA (NATIONAL DISASTER MANAGEMENT RESEARCH INSTITUTE)
    Inventors: Seo Jun KIM, Byung Man YOON, Ho Jun YOU, Dong Su KIM, Tae Sung CHEONG, Jae Seung JOO, Hyeon Seok CHOI
  • Publication number: 20210341330
    Abstract: Disclosed is a system for automatically measuring a discharge in real time based on a CCTV image. The system includes: a water depth measurement device filtering water depth data measured by a measurement means with a local linear regression-based bivariate scatterplot smoothing technique through flexible bandwidth application to calculate the water depth of a stream; an image acquisition device acquiring a continuous image of a flow speed measurement side of the stream; an image analysis PC using an image of the image acquisition device to measure the surface flow speed in real time and receiving a measured water depth from the water depth measurement device to measure the discharge in real time with cross-section data; and a discharge calculation and management server for transmitting and displaying a real-time discharge measurement result based on a web.
    Type: Application
    Filed: November 29, 2018
    Publication date: November 4, 2021
    Applicants: HYDROSEM, REPUBLIC OF KOREA (NATIONAL DISASTER MANAGEMENT RESEARCH INSTITUTE)
    Inventors: Seo Jun KIM, Byung Man YOON, Ho Jun YOU, Dong Su KIM, Tae Sung CHEONG, Jae Seung JOO, Hyeon Seok CHOI
  • Publication number: 20210327075
    Abstract: Disclosed is a river flow velocity measurement device using optical flow image processing, including: an image photographing unit configured to acquire consecutive images of a flow velocity measurement site of a river; an image conversion analysis unit configured to dynamically extract frames of the consecutive images in order to normalize image data of the image photographing unit, image-convert the extracted frames, and perform homography calculation; an analysis region extracting unit configured to extract an analysis region of an analysis point; a pixel flow velocity calculating unit configured to calculate a pixel flow velocity using an image in the analysis region of the analysis point extracted by the analysis region extracting unit; and an actual flow velocity calculating unit configured to convert the pixel flow velocity calculated by the pixel flow velocity calculating unit into an actual flow velocity.
    Type: Application
    Filed: November 29, 2018
    Publication date: October 21, 2021
    Applicants: HYDROSEM, REPUBLIC OF KOREA (NATIONAL DISASTER MANAGEMENT RESEARCH INSTITUTE)
    Inventors: Seo Jun KIM, Byung Man YOON, Ho Jun YOU, Dong Su KIM, Tae Sung CHEONG, Jae Seung JOO, Hyeon Seok CHOI