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公开(公告)号：US20240019586A1
公开(公告)日：2024-01-18
申请号：US17989246
申请日：2022-11-17
Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Inventor： Taikjin LEE , Beomju SHIN , Jungho LEE , Changsu YU , Taehun KIM , Chulki KIM , Jaehun KIM
IPC: G01S19/48
CPC classification number: G01S19/48
Abstract: The present disclosure relates to a method for performing vehicle position recognition using a geomagnetic sensor by calibrating the geomagnetic sensor on the basis of a geomagnetic sensor value stored in a database in advance before entrance to an area in which position recognition through a GPS is impossible. Thus, it is possible to accurately detect a position of a vehicle using the geomagnetic sensor even in a structure such as a tunnel.
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Patent Agency Ranking
公开(公告)号：US20190204215A1
公开(公告)日：2019-07-04
申请号：US16235869
申请日：2018-12-28
Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Inventor： Minah SEO , Yongsang RYU , Young Min JHON , Jaehun KIM , Taikjin LEE , Chulki KIM
IPC: G01N21/3581
CPC classification number: G01N21/3581 , G01N2201/068
Abstract: A system for adjusting transmittance, according to the present disclosure, includes a sensing device configured to amplify electromagnetic waves of a specific frequency and a squeegee configured to concentrate a target material inside a slot formed in the sensing device. A transmittance of the sensing device is adjusted according to concentration of the target material concentrated inside the slot by the squeegee.
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公开(公告)号：US20200033463A1
公开(公告)日：2020-01-30
申请号：US16477311
申请日：2017-12-28
Applicant: Korea Institute of Science and Technology
Inventor： Taikjin LEE , Youngmin JHON , Jaehun KIM , Minah SEO , Beomju SHIN
Abstract: The present invention relates to SLAM (simultaneous localization and mapping) method and apparatus robust to a wireless environment change. A relative position of a moving node is estimated based on motion sensing of the moving node, the relative position of the moving node is corrected based on a comparison between a change pattern of at least one signal strength received over a plurality of time points and a signal strength distribution in a region in which the moving node is located, a route of the region is represented by using the relative position corrected as described above, and thereby, it is possible accurately estimate a position of the moving node and to create a map in which very accurate route information is recorded throughout the entire region at the same time, even if a wireless environment change such as signal interference between communication channels, expansion of an access point, and occurrence of a failure or an obstacle is made or a poor wireless environment such as lack of the number of access points occurs.
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公开(公告)号：US20190369205A1
公开(公告)日：2019-12-05
申请号：US16476901
申请日：2017-12-28
Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Inventor： Taikjin LEE , Youngmin JHON , Jaehun KIM , Boseon YU , Beomju SHIN , Jaewon BANG
Abstract: The present invention relates to wireless localization method and apparatus of high accuracy, and measures strength of at least one signal that is transmitted from at least one fixed node, estimates a relative position of a moving node, generates a change pattern of at least one signal strength according to relative changes in positions of the moving node over a plurality of time points from at least one signal strength and the relative position of the moving node, and estimates an absolute position of the moving node, based on a comparison between the change pattern of the at least one signal strength and a map of a distribution pattern shape of signal strength in a region where the moving node is located. Accordingly, it is possible to accurately estimate a position of a moving node using a radio signal which not only accurately estimates the position of the moving node even in a change of wireless environment but also has almost no change in signal strength over a wide region.
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公开(公告)号：US20180309260A1
公开(公告)日：2018-10-25
申请号：US15957787
申请日：2018-04-19
Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Inventor： Young Min JHON , Byunghyuck MOON , Young In JOHN , Minah SEO , Jaehun KIM , Yongsang RYU , Taikjin LEE , Seok LEE
CPC classification number: H01S3/1112 , H01S3/08027 , H01S3/08036 , H01S3/08054 , H01S3/092 , H01S3/0941 , H01S3/10061 , H01S3/107 , H01S3/1075 , H01S3/11 , H01S3/1103 , H01S3/1109 , H01S3/115 , H01S3/1611 , H01S3/1623 , H01S3/1625 , H01S3/1636 , H01S3/1643 , H01S2301/08
Abstract: Disclosed herein is a single pulse laser apparatus which includes a first mirror and a second mirror disposed at both ends of the single pulse laser apparatus and having reflectivities of a predetermined level or more; a gain medium rotated at a predetermined angle and configured to oscillate a laser beam in a manual mode-locking state; a linear polarizer configured to output a beam having a specific polarized component of the oscillated laser beam; an etalon configured to adjust a pulse width of the oscillated laser beam; and an electro-optic modulator configured to perform Q-switching and single pulse switching.
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公开(公告)号：US20180180771A1
公开(公告)日：2018-06-28
申请号：US15808066
申请日：2017-11-09
Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
Inventor： Minah SEO , Sanghun LEE , Deokha WOO , Jaehun KIM , Taikjin LEE , Jaebin CHOI , Chulki KIM , Joo-Hiuk SON , Young Min JHON
CPC classification number: G02B1/002 , G02B5/20 , G02B27/28 , H01Q15/0086
Abstract: Disclosed is a metamaterial for an electromagnetic wave filter which includes: a substrate; and a film disposed on the substrate, wherein the film is formed such that a set of slots arranged to form a rotationally symmetric pattern is patterned in an intaglio shape or a set of structures arranged to form a rotationally symmetric pattern is embossed and patterned to control a transmission rate according to polarization of an electromagnetic wave incident on the film.
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