公开(公告)号：US11965990B2

公开(公告)日：2024-04-23

申请号：US17298749

申请日：2020-12-30

Applicant: RESEARCH COOPERATION FOUNDATION OF YEUNGNAM UNIVERSITY

Inventor： Jeong Sook Eom ,  Gun Zung Kim ,  Yong Wan Park

IPC: G01C3/08 ,  G01S7/4911 ,  G01S7/484

CPC classification number: G01S7/4911 ,  G01S7/484

Abstract: A lidar sensor device according to an embodiment includes a data generation unit that generates light identification data, an optical modulation unit that generates a plurality of modulated signals for the optical identification data by performing orthogonal frequency division multiplexing (OFDM) modulation on the optical identification data and generates a plurality of laser signals respectively corresponding to the plurality of modulated signals and having different frequencies, and a transmission unit that simultaneously transmits the plurality of laser signals to different measurement points according to the frequencies, respectively.

公开(公告)号：US11761796B2

公开(公告)日：2023-09-19

申请号：US17298758

申请日：2020-12-29

Applicant: RESEARCH COOPERATION FOUNDATION OF YEUNGNAM UNIVERSITY

Inventor： Gun Zung Kim ,  Yong Wan Park ,  Jeong Sook Eom

IPC: G01D5/26 ,  G01C21/14

CPC classification number: G01D5/264 ,  G01C21/14

Abstract: An apparatus for measuring a position according to an embodiment includes a light source emitting light to an inner surface of a pipe, a first lens receiving reflected light from which light emitted by the light source is reflected by the inner surface and converting the reflected light into parallel light parallel to an optical axis, a second lens disposed on an optical path of the parallel light and converting the parallel light into a convergent refracted light, an image sensor disposed on an optical path of the refracted light, one or more elastic members disposed between the first lens and the second lens, and a plurality of wheels that are coupled to a side surface of the first lens and are in close contact with the inner surface to be rotated by movement of the moving body.