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

IPC: G01S11/06 ,  G01S5/02

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.

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.

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

IPC: G01S5/14 ,  G01S5/00 ,  G01S19/01 ,  G01S5/02 ,  H04W88/18 ,  H04W4/029 ,  G01S11/06

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.

公开(公告)号：US20250025107A1

公开(公告)日：2025-01-23

申请号：US18538021

申请日：2023-12-13

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Taikjin LEE ,  Hankyeol KYUNG ,  Chansoo KIM ,  Sangkyung KIM ,  Beomju SHIN ,  Taehun KIM

IPC: A61B5/00 ,  G16H80/00

Abstract: The present disclosure relates to a contact verification technology based on signal similarity, and an apparatus of contact verification receives and stores spatiotemporal signal information capable of specifying time and space from a plurality of user equipments (UEs), extract the spatiotemporal signal information of a specific user among the stored spatiotemporal signal information, configure the extracted spatiotemporal signal information of the specific user as reference spatiotemporal signal information, and compare similarity between the reference spatiotemporal signal information and the other stored spatiotemporal signal information, and determine whether or not there is contact between the specific user and another user based on the similarity.

公开(公告)号：US20190383922A1

公开(公告)日：2019-12-19

申请号：US16477458

申请日：2017-12-28

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Taikjin LEE ,  Chulki KIM ,  Yongsang RYU ,  Beomju SHIN

IPC: G01S11/06 ,  G01C21/20

Abstract: The present invention relates to integrated localization method and apparatus of high accuracy, and estimates a relative position of a moving node, based on motion sensing of the moving node, estimates an absolute position of the moving node, based on a change pattern of at least one signal strength received from at least one fixed node over a plurality of time points, calculates accuracy of the absolute position of the moving node that changes along a movement route of the moving node, and determines a current position of the moving node from at least one of the relative position and the absolute position estimated as such in accordance with the accuracy of the absolute position of the moving node. 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 or various route changes but also has almost no change in signal strength over a wide region.