Patents by Inventor Kwon Kyu Yu
Kwon Kyu Yu 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).
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Patent number: 11766204Abstract: The present invention provides a magnetic monitoring system for imaging, monitoring, scanning or mapping for brain or heart activity of subjects including children and adults, the system comprising of a magnetoencephalographic or magnetocardiographic system incorporating SQUID sensors for measuring brain activity or heart activity, the system including a plurality of Dewar helmets of variable sizes and shapes; and a plurality of monitoring interfaces; wherein the sensor system helmet is moveable by horizontal Dewar rotation. The sensor system includes configurations where the size and shape of helmets in the system may be different to accommodate different sized subjects for monitoring simultaneously.Type: GrantFiled: May 4, 2018Date of Patent: September 26, 2023Assignee: The Korea Research Institute of Standards and Science (“KRISS”)Inventors: David Burton, Kwon Kyu Yu, Yong-Ho Lee, Hyuk Chan Kwon, Jin Mok Kim, Sang Kil Lee
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Publication number: 20230263445Abstract: A magnetic field measuring apparatus according to an example embodiment includes: an external container; an internal container storing a liquid refrigerant, disposed inside the external container, and including a neck portion having a first diameter and a body portion having a second diameter greater than the first diameter, wherein a space between the internal container and the external container is maintained in a vacuum state; a SQUID sensor module mounting plate disposed below the internal container; a plurality of SQUID sensor modules mounted below the SQUID sensor module mounting plate; and a 4K heat shielding portion formed of a conductive mesh disposed to surround the SQUID sensor module mounting plate and the plurality of SQUID sensor modules.Type: ApplicationFiled: April 26, 2023Publication date: August 24, 2023Inventors: Kwon-Kyu YU, Yong-Ho LEE, Jin-Mok KIM, Hyukchan KWON, Sang Kil LEE, Bo-Kyung KIM
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Publication number: 20220330870Abstract: A dual-helmet magnetoencephalography measuring apparatus according to an example embodiment includes: an internal container storing a liquid refrigerant; an external container disposed to surround the internal container and including a first external helmet and a second external helmet disposed to be spaced apart from each other; a first sensor-mounted helmet disposed between the external container and the internal container to surround the first external helmet; a second sensor-mounted helmet disposed between the external container and the internal container to surround the second external helmet; a plurality of first SQUID sensor modules disposed on the first sensor-mounted helmet; and a plurality of second SQUID sensor modules disposed on the second sensor-mounted helmet. The internal container and the external container are tilted in a vertical direction.Type: ApplicationFiled: June 29, 2022Publication date: October 20, 2022Inventors: Kwon-Kyu YU, Yong-Ho LEE, Hyukchan KWON, Jin-Mok KIM, Sang-Kil LEE, Bokyung KIM, Min-Young KIM, Kiwong KIM
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Publication number: 20220330869Abstract: A dual-helmet magnetoencephalography measuring apparatus includes: an internal container storing a liquid refrigerant; an external container disposed to surround the internal container and including a first external helmet and a second external helmet disposed to be spaced apart from each other; a first sensor-mounted helmet disposed to surround the first external helmet between the external container and the internal container; a second sensor-mounted helmet disposed to surround the second external helmet between the externa container and the internal container; a plurality of first SQUID sensor module disposed on the first sensor-mounted helmet; and a plurality of second SQUID sensor module disposed on the second sensor-mounted helmet.Type: ApplicationFiled: June 29, 2022Publication date: October 20, 2022Inventors: Kwon-Kyu YU, Yong-Ho LEE, Hyukchan KWON, Jin-Mok KIM, Sang-Kil LEE, Bokyung KIM, Min-Young KIM, Kiwong KIM
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Patent number: 11064900Abstract: Provided are an ultra-low field nuclear magnetic resonance device and a method for measuring an ultra-low field nuclear resonance image. The ultra-low field nuclear magnetic resonance device includes an AC power supply configured to supply a current to a measurement target in such a manner the current flows to the measurement target, magnetic field measurement means disposed adjacent to the measurement target, and measurement bias magnetic field generation means configured to apply a measurement bias magnetic field corresponding to a proton magnetic resonance frequency of the measurement target. A vibration frequency of the AC power supply matches the proton magnetic resonance frequency of the measurement target, and the magnetic field measurement means measures a nuclear magnetic resonance signal generated from the measurement target.Type: GrantFiled: April 3, 2017Date of Patent: July 20, 2021Assignee: Korea Research Institute of Standards and ScienceInventors: Seong-Joo Lee, Kiwoong Kim, Jeong-Hyun Shim, Kwon-Kyu Yu, Seong-min Hwang
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Patent number: 10613160Abstract: A cryocooler superconducting quantum interference (SQUID) system includes a cryocooler including a cold head, a cold head chamber in which the cold head is disposed, a sensor chamber including a SQUID sensor cooled to a low temperature by the cryocooler; and a connection block connecting the cold head and a thermal anchor disposed in the sensor chamber to each other to cool the SQUID sensor in the sensor chamber.Type: GrantFiled: February 28, 2017Date of Patent: April 7, 2020Assignee: Korea Research Institute of Standards and ScienceInventors: Kwon-Kyu Yu, Kiwoong Kim, Hyukchan Kwon, Jin-Mok Kim, Sang-Kil Lee, Yong-Ho Lee
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Patent number: 10585151Abstract: Superconducting quantum interference device (SQUID) sensor module and a magnetoencephalography (MEG) measuring apparatus. The SQUID sensor module includes a fixed block having one end fixed to the sensor-mounted helmet, a bobbin having one end combined with the other end of the fixed block and having a groove in which a pick-up coil is wound, a bobbin fixing or attachment structure or material fixed to the other end of the fixed block via a through-hole formed in the center of the bobbin, a SQUID printed circuit board (PCB) disposed one an upper side surface of the bobbin and including a SQUID sensor, and a signal line connection PCB inserted into an outer circumferential surface of the fixed block and adapted to transmit a signal detected in the SQUID sensor to an external circuit.Type: GrantFiled: April 13, 2016Date of Patent: March 10, 2020Assignee: Korea Research Institute of Standards and ScienceInventors: Kwon-Kyu Yu, Yong-Ho Lee, Kiwoong Kim, Jin-Mok Kim, Hyukchan Kwon, Sang-Kil Lee
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Patent number: 10426363Abstract: A magnetoencephalography (MEG) measuring apparatus and an MEG measuring method. The MEG measuring apparatus includes a superconducting helmet having an inward brim, a sensor-equipped helmet disposed inside the superconducting helmet, a pick-up coil disposed inside the sensor-equipped helmet, and a superconducting quantum interference device (SQUID) sensor mounted on the sensor-equipped helmet and connected to the pick-up coil.Type: GrantFiled: March 3, 2016Date of Patent: October 1, 2019Assignee: Korea Research Institute of Standards and ScienceInventors: Kwon-Kyu Yu, Yong-Ho Lee, Kiwoong Kim, Jin-Mok Kim, Hyukchan Kwon, Sang-Kil Lee
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Publication number: 20190082997Abstract: Provided are an ultra-low field nuclear magnetic resonance device and a method for measuring an ultra-low field nuclear resonance image. The ultra-low field nuclear magnetic resonance device includes an AC power supply configured to supply a current to a measurement target in such a manner the current flows to the measurement target, magnetic field measurement means disposed adjacent to the measurement target, and measurement bias magnetic field generation means configured to apply a measurement bias magnetic field corresponding to a proton magnetic resonance frequency of the measurement target. A vibration frequency of the AC power supply matches the proton magnetic resonance frequency of the measurement target, and the magnetic field measurement means measures a nuclear magnetic resonance signal generated from the measurement target.Type: ApplicationFiled: April 3, 2017Publication date: March 21, 2019Inventors: Seong-Joo LEE, Kiwoong KIM, Jeong-Hyun SHIM, Kwon-Kyu YU, Seong-min HWANG
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Patent number: 10162028Abstract: Provided is a low magnetic field and ultra-low magnetic field NMR and MRI apparatus. The low magnetic field and ultra-low magnetic field NMR and MRI apparatus includes a SQUID sensor and a prepolarization magnetic field coil. The prepolarization magnetic field coil generates a prepolarization magnetic field to polarize a sample. The prepolarization magnetic coil generates a counter pulse in a direction opposite to that of the prepolarization magnetic field immediately before or immediately after the prepolarization magnetic field is generated. The counter pulse demagnetizes wanted magnetization including that of the prepolarization magnetic field coil itself.Type: GrantFiled: February 10, 2015Date of Patent: December 25, 2018Assignee: Korea Research Institute of Standards and ScienceInventors: Seong-min Hwang, Kiwoong Kim, Kwon-Kyu Yu, Seong-Joo Lee, Jeong-Hyun Shim
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Patent number: 10060990Abstract: The present invention relates to a shield apparatus and a shield method for measuring a subtle magnetic field. More specifically, the present invention relates to a shield apparatus having a precise magnetic sensor therein, for shielding an external magnetic field in a subtle magnetic field measurement apparatus including a magnetic field generation apparatus for exciting a sample, the shield apparatus for measuring a subtle magnetic field, including: a shield wall provided with a high-conductivity metal layer of high conductivity being partitioned into a plurality of segments and having a high-frequency shield property and a closed high-permeability soft magnetic layer spaced apart from the high-conductivity metal layer by a predetermined distance, so as to seal a measurement space.Type: GrantFiled: March 8, 2013Date of Patent: August 28, 2018Assignee: Korea Research Institute of Standards and ScienceInventors: Ki Woong Kim, Yong Ho Lee, Kwon Kyu Yu, Seong-Joo Lee
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Patent number: 10028674Abstract: Provided are ultra-low-field nuclear-magnetic-resonance myocardial electrical activity detection method and an ultra-low-field nuclear-magnetic-resonance device. The ultra-low-field nuclear-magnetic-resonance device includes magnetic shielding room; a high-sensitivity magnetic field sensor disposed adjacent to a measurement target disposed inside the magnetic shielding room; and a bias magnetic field generating coil for providing an external measurement bias magnetic field, corresponding to a proton magnetic resonance frequency (nuclear magnetic resonance frequency) corresponding to a frequency of periodic myocardial activity of a lesion desired to be measured, to the measurement target. The high-sensitivity magnetic field sensor measures a magnetic resonance signal generated from the measurement target.Type: GrantFiled: May 10, 2013Date of Patent: July 24, 2018Assignee: Korea Research Institute of Standards and ScienceInventors: Kiwoong Kim, Yong-Ho Lee, Jin-Mok Kim, Hyukchan Kwon, Kwon Kyu Yu
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Patent number: 9921280Abstract: Provided are an ultra-low-field nuclear magnetic resonance device and an ultra-low-field nuclear magnetic resonance measuring method. The method includes applying a first measurement bias magnetic field corresponding to an excitation frequency of a coherent biomagnetic field generated in association with the electrophysiological activity of human body organs, applying a second measurement bias magnetic field having the same direction as the first measurement bias magnetic field and having a different magnitude than the first measurement bias magnetic field, and measuring a magnetic resonance signal generated in the human body by using magnetic field measuring means.Type: GrantFiled: July 30, 2014Date of Patent: March 20, 2018Assignee: Korea Research Institute of Standards and ScienceInventors: Kiwoong Kim, Yong-ho Lee, Seong-Joo Lee, Kwon-Kyu Yu
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Patent number: 9903927Abstract: Provided are an apparatus and a method for canceling magnetic fields. The apparatus includes a magnetic field canceling coil disposed adjacent to an inner wall of a magnetic shield room to surround the entire inner space or a portion of an inner space of the magnetic shield room; and a magnetic field canceling coil driver to supply current to the magnetic field canceling coil. The magnetic field canceling coil cancels a prepolarization magnetic field established on the wall of the magnetic shield room by a prepolarization coil disposed in the center of the magnetic shield room to minimize magnetic interference caused by the magnetic shield room.Type: GrantFiled: June 4, 2013Date of Patent: February 27, 2018Assignee: Korea Research Institute of Standards and ScienceInventors: Seong-min Hwang, Kiwoong Kim, Jin Mok Kim, Yong-Ho Lee, Chan Seok Kang, Kwon Kyu Yu, Seong-Joo Lee
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Patent number: 9829546Abstract: Provided are a low-temperature cooling apparatus and a superconducting quantum interference device (SQUID) sensor module. The low-temperature cooling apparatus includes an outer container; an inner container disposed inside the outer container, the inner container including a neck portion having a first diameter and a body portion having a second diameter greater than the first diameter; an insert inserted into the neck portion of the inner container; and a plurality of SQUID sensor modules inserted into the body portion of the inner container. Each of the SQUID sensor modules is in the form of a fan-shaped pillar and is fixedly coupled with an inner bottom plate of the inner container.Type: GrantFiled: April 21, 2015Date of Patent: November 28, 2017Assignee: Korea Research Institute of Standards and ScienceInventors: Kwon-Kyu Yu, Yong-Ho Lee, Hyukchan Kwon, Jin-Mok Kim, Kiwoong Kim, Sang-Kil Lee
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Patent number: 9823312Abstract: An apparatus and a method for indirectly cooling a superconducting quantum interference device (SQUID) are provided. The apparatus includes an outer container extending in a vertical direction; a metallic inner container inserted into the outer container to store a liquid coolant, the metal inner container including a top plate; a SQUID sensor module disposed between a bottom surface of the outer container and a bottom surface of the inner container; a heat transfer pillar adapted to cool the SQUID sensor module, the heat transfer pillar having one end connected to the bottom surface of the inner container and the other end directly or indirectly connected to the SQUID sensor module; a magnetic shield part formed of a superconductor covering a top surface of the SQUID sensor module; and a heat conduction plate being in thermal contact with the other end of the heat transfer pillar.Type: GrantFiled: April 21, 2015Date of Patent: November 21, 2017Assignee: Korea Research Institute of Standards and ScienceInventors: Kwon-Kyu Yu, Yong-Ho Lee, Kiwoong Kim, Hyukchan Kwon, Jin-Mok Kim, Sang-Kil Lee
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Patent number: 9759793Abstract: Provided are an object discrimination method and an object discrimination apparatus using an ultra-low magnetic field nuclear magnetic resonance (NMR). The method includes measuring the respective spin-lattice relaxation times at a plurality of strengths of prepolarization magnetic fields with respect to a measurement target and classifying the measurement target using the spin-lattice relaxation times.Type: GrantFiled: April 25, 2014Date of Patent: September 12, 2017Assignee: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCEInventors: Kiwoong Kim, Chan-Seok Kang, Seong-Joo Lee, Yong-ho Lee, Kwon-Kyu Yu
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Publication number: 20170168121Abstract: A cryocooler superconducting quantum interference (SQUID) system includes a cryocooler including a cold head, a cold head chamber in which the cold head is disposed, a sensor chamber including a SQUID sensor cooled to a low temperature by the cryocooler; and a connection block connecting the cold head and a thermal anchor disposed in the sensor chamber to each other to cool the SQUID sensor in the sensor chamber.Type: ApplicationFiled: February 28, 2017Publication date: June 15, 2017Inventors: Kwon-Kyu YU, Kiwoong Kim, Hyukchan Kwon, Jin-Mok Kim, Sang-Kil Lee, Yong-Ho Lee
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Publication number: 20160223622Abstract: Superconducting quantum interference device (SQUID) sensor module and a magnetoencephalography (MEG) measuring apparatus. The SQUID sensor module includes a fixed block having one end fixed to the sensor-mounted helmet, a bobbin having one end combined with the other end of the fixed block and having a groove in which a pick-up coil is wound, a bobbin fixing or attachment structure or material fixed to the other end of the fixed block via a through-hole formed in the center of the bobbin, a SQUID printed circuit board (PCB) disposed one an upper side surface of the bobbin and including a SQUID sensor, and a signal line connection PCB inserted into an outer circumferential surface of the fixed block and adapted to transmit a signal detected in the SQUID sensor to an external circuit.Type: ApplicationFiled: April 13, 2016Publication date: August 4, 2016Inventors: Kwon-Kyu Yu, Yong-Ho Lee, Kiwoong Kim, Jin-Mok Kim, Hyukchan Kwon, Sang-Kil Lee
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Publication number: 20160209482Abstract: Provided is a low magnetic field and ultra-low magnetic field NMR and MRI apparatus. The low magnetic field and ultra-low magnetic field NMR and MRI apparatus includes a SQUID sensor and a prepolarization magnetic field coil. The prepolarization magnetic field coil generates a prepolarization magnetic field to polarize a sample. The prepolarization magnetic coil generates a counter pulse in a direction opposite to that of the prepolarization magnetic field immediately before or immediately after the prepolarization magnetic field is generated. The counter pulse demagnetizes wanted magnetization including that of the prepolarization magnetic field coil itself.Type: ApplicationFiled: February 10, 2015Publication date: July 21, 2016Inventors: Seong-min Hwang, Kiwoong Kim, Kwon-Kyu Yu, Seong-Joo Lee, Jeong-Hyun Shim