Patents by Inventor Byung-Seon Choi

Byung-Seon Choi 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).

  • Patent number: 10414045
    Abstract: Disclosed are a device and a method for controlling a motor. According to a specific embodiment of the present disclosure, an input shaft of a motor is provided with a low-resolution absolute position detector and an output shaft of the motor is provided with a low-resolution absolute position detector having a resolution greater than or equal to a reduction gear ratio. An initial offset and an offset are defined accordingly, and a high-resolution output shaft absolute position is derived from a relational expression, which is defined by an input shaft absolute position received at a predetermined time interval, a derived offset, an output shaft absolute position, and the reduction gear ratio, such that it is possible to easily detect the high-resolution output shaft absolute position by using a low-price absolute position detector without the modification or addition of an actuator.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: September 17, 2019
    Assignee: Korea Atomic Energy Research Institute
    Inventors: Hocheol Shin, Chang-Hoi Kim, Yong-Chil Seo, Jongwon Park, Byung-Seon Choi, Jeikwon Moon
  • Publication number: 20190162986
    Abstract: Provided is an apparatus configured to split light into a plurality of polarizations, the apparatus including an input waveguide configured to receive the light, a first interferometer configured to split the light into a first polarization and a second polarization, and a second interferometer configured to split the light into a third polarization and a fourth polarization, wherein the first interferometer and the second interferometer are connected in parallel, the first interferometer comprises a first output waveguide configured to output the first polarization, and a second output waveguide configured to output the second polarization, and the second interferometer comprises a third output waveguide configured to output the third polarization, and a fourth output waveguide configured to output the fourth polarization.
    Type: Application
    Filed: November 8, 2018
    Publication date: May 30, 2019
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Joong-Seon Choe, Chun Ju Youn, Heasin Ko, Kap-Joong Kim, Byung-seok Choi
  • Publication number: 20190148211
    Abstract: A deposition apparatus for depositing a material on a wafer, the apparatus including a lower shower head; an upper shower head disposed on the lower shower head, the upper shower head facing the lower shower head; and a support structure between the upper shower head and the lower shower head, the wafer being supportable by the support structure, wherein the upper shower head includes upper holes for providing an upper gas onto the wafer, the lower shower head includes lower holes for providing a lower gas onto the wafer, the support structure includes a ring body surrounding the wafer; a plurality of ring support shafts between the ring body and the lower shower head; and a plurality of wafer supports extending inwardly from a lower region of the ring body to support the wafer, and the plurality of wafer supports are spaced apart from one another.
    Type: Application
    Filed: May 31, 2018
    Publication date: May 16, 2019
    Inventors: Ji Youn SEO, Byung Sun PARK, Sung Jin PARK, Ji Woon IM, Hyun Seok LIM, Byung Ho CHUN, Yu Seon KANG, Hyuk Ho KWON, Tae Yong EOM, Dae Hun CHOI, Dong Hyeop HA
  • Publication number: 20190027263
    Abstract: A chemical decontamination reagent containing a reducing agent, a reductive metal ion, and an inorganic acid is provided to remove a radioactive oxide layer on a metal surface. The reagent can dissolve the radioactive oxide layer on the metal surface effectively at a relatively low temperature and enables a simple process of contacting the reagent to the radioactive oxide, thus economically effective in terms of cost and time required for the process. Since the decontamination does not use a conventional organic chelating agent such as oxalic acid, but the reducing agent as a main substance, the residuals of the reducing agent remained after decontamination can be decomposed and removed with an oxidizing agent. Due to the easy decomposition with the chemical decontamination reagent, secondary wastes can be minimized and the radionuclides remained in the decontamination reagent solution can be removed effectively.
    Type: Application
    Filed: August 14, 2018
    Publication date: January 24, 2019
    Inventors: Hui-Jun WON, Chong-Hun JUNG, Sang Yoon PARK, Wangkyu CHOI, Jung-Sun PARK, Jeikwon MOON, In-Ho YOON, Byung-Seon CHOI
  • Publication number: 20180264645
    Abstract: Disclosed are a device and a method for controlling a motor. According to a specific embodiment of the present disclosure, an input shaft of a motor is provided with a low-resolution absolute position detector and an output shaft of the motor is provided with a low-resolution absolute position detector having a resolution greater than or equal to a reduction gear ratio. An initial offset and an offset are defined accordingly, and a high-resolution output shaft absolute position is derived from a relational expression, which is defined by an input shaft absolute position received at a predetermined time interval, a derived offset, an output shaft absolute position, and the reduction gear ratio, such that it is possible to easily detect the high-resolution output shaft absolute position by using a low-price absolute position detector without the modification or addition of an actuator.
    Type: Application
    Filed: May 16, 2018
    Publication date: September 20, 2018
    Applicant: KOREA ATOMIC ENERGY RESEARCH INSTITUTE
    Inventors: Hocheol Shin, Chang-Hoi Kim, Yong-Chil Seo, Jongwon Park, Byung-Seon Choi, Jeikwon Moon
  • Publication number: 20170169158
    Abstract: The present invention relates to a cutting process simulation method and a system thereof which can efficiently optimize the decommissioning process of a nuclear facility, thereby saving costs and time and ensuring safety in the decommissioning process. The cutting process simulation system, according to one embodiment of the present invention, may comprise: a display unit: and a control unit which cuts a cutting target in a nuclear facility by using a design program, displays the cut shape on the display unit, and predicts the amount of secondary waste generated in the process of cutting the cutting target.
    Type: Application
    Filed: October 21, 2014
    Publication date: June 15, 2017
    Applicant: KOREA ATOMIC ENERGY RESEARCH INSTITUTE
    Inventors: Dong Jun HYUN, Byung Seon CHOI, Kwan Seong JEONG, Jong Hwan LEE, Ik June KIM, Geun Ho KIM, Jei Kwon MOON
  • Publication number: 20140205052
    Abstract: A chemical decontamination reagent containing a reducing agent, a reductive metal ion, and an inorganic acid is provided to remove a radioactive oxide layer on a metal surface. The reagent can dissolve the radioactive oxide layer on the metal surface effectively at a relatively low temperature and enables a simple process of contacting the reagent to the radioactive oxide, thus economically effective in terms of cost and time required for the process. Since the decontamination does not use a conventional organic chelating agent such as oxalic acid, but the reducing agent as a main substance, the residuals of the reducing agent remained after decontamination can be decomposed and removed with an oxidizing agent. Due to the easy decomposition with the chemical decontamination reagent, secondary wastes can be minimized and the radionuclides remained in the decontamination reagent solution can be removed effectively.
    Type: Application
    Filed: September 4, 2013
    Publication date: July 24, 2014
    Applicants: Korea Hydro And Nuclear Power Co., Ltd., Korea Atomic Energy Research Institute
    Inventors: Hui-Jun Won, Chong-Hun Jung, Sang Yoon Park, Wangkyu Choi, Jung-Sun Park, Jeikwon Moon, In-Ho Yoon, Byung-Seon Choi