Zobrazeno 1 - 10 of 14 pro vyhledávání: '"Gunhee Koo"'
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Akademický článek
Development of a High Precision Displacement Measurement System by Fusing a Low Cost RTK-GPS Sensor and a Force Feedback Accelerometer for Infrastructure Monitoring
Autor: Gunhee Koo, Kiyoung Kim, Jun Yeon Chung, Jaemook Choi, Nam-Yeol Kwon, Doo-Young Kang, Hoon Sohn
Publikováno v: Sensors, Vol 17, Iss 12, p 2745 (2017)
A displacement measurement system fusing a low cost real-time kinematic global positioning system (RTK-GPS) receiver and a force feedback accelerometer is proposed for infrastructure monitoring. The proposed system is composed of a sensor module, a b
Externí odkaz: https://doaj.org/article/28970ac6b7a34af283b8bd79aab3c373
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3
A Two-Step Optimization for Extrinsic Calibration of Multiple Camera System (MCS) Using Depth-Weighted Normalized Points
Autor: Woonhyung Jung, Nakju Lett Doh, Gunhee Koo
Publikováno v: IEEE Robotics and Automation Letters. 6:6608-6615
A multiple camera system (MCS), which allows only a limited common field-of-view between adjacent cameras, has been chiefly calibrated using a typical 2D-3D point correspondence. However, the correspondence contains a potential instability by which t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fcd3b9391503ab73c5b215d5b20ce6f2
https://doi.org/10.1109/lra.2021.3094412
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Analytic Plane Covariances Construction for Precise Planarity-based Extrinsic Calibration of Camera and LiDAR
Autor: Gunhee Koo, Bumchul Jang, Nakju Lett Doh, Jaehyeon Kang
Publikováno v: ICRA
Planarity of checkerboards is a widely used feature for extrinsic calibration of camera and LiDAR. In this study, we propose two analytically derived covariances of (i) plane parameters and (ii) plane measurement, for precise extrinsic calibration of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::41a29657d94476cdd3c7c28a637492bb
https://doi.org/10.1109/icra40945.2020.9197149
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Structural displacement estimation through multi-rate fusion of accelerometer and RTK-GPS displacement and velocity measurements
Autor: Gunhee Koo, Junyeon Chung, Hoon Sohn, Jaemook Choi, In-hwan Bae, Ki Young Kim
Publikováno v: Measurement. 130:223-235
For civil infrastructure monitoring, RTK-GPS sensors are commonly used to measure dynamic displacement. However, these sensors have poor precision (around 0.5–5 cm in the vertical direction) and a low sampling rate (up to 20 Hz). Furthermore, both
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f78f40d1d65dc81f5a5a3ff469f46f75
https://doi.org/10.1016/j.measurement.2018.07.090
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7
Dynamic displacement estimation by fusing biased high-sampling rate acceleration and low-sampling rate displacement measurements using two-stage Kalman estimator
Autor: Gunhee Koo, Hoon Sohn, Ki Young Kim, Jaemook Choi
Publikováno v: Smart Structures and Systems. 17:647-667
In this paper, dynamic displacement is estimated with high accuracy by blending high-sampling rate acceleration data with low-sampling rate displacement measurement using a two-stage Kalman estimator. In Stage 1, the two-stage Kalman estimator first
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::12bce9009e3df6c9f8e4ea9bbe2febe8
https://doi.org/10.12989/sss.2016.17.4.647
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8
Development of a High Accuracy and High Sampling Rate Displacement Sensor for Civil Engineering Structures Monitoring
Autor: Jaemook Choi, Hoon Sohn, Ki Young Kim, Gunhee Koo, Junyeon Chung
Publikováno v: Lecture Notes in Civil Engineering ISBN: 9783319674421
Displacement is one of the key physical quantities that are necessary to understand characteristics and behaviours of civil engineering structures. In this study, a new displacement sensor module is developed by integrating GPS-RTK and accelerometer
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::77b09fc8f5061171522a406d79bf7c08
https://doi.org/10.1007/978-3-319-67443-8_4
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9
Development and field application of a nonlinear ultrasonic modulation technique for fatigue crack detection without reference data from an intact condition
Autor: Gunhee Koo, Suyoung Yang, Yongtak Kim, Hyung Jin Lim, Hoon Sohn, In-hwan Bae, Jeong-Hwan Jang
Publikováno v: Smart Materials and Structures. 25:095055
In this study, a fatigue crack detection technique, which detects a fatigue crack without relying on any reference data obtained from the intact condition of a target structure, is developed using nonlinear ultrasonic modulation and applied to a real
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ce9ba8713676235a1da3bc5ea5088d6d
https://doi.org/10.1088/0964-1726/25/9/095055
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10
Structural displacement, velocity and acceleration measurement system based on accelerometer and GPS-RTK for large-scale civil structures
Autor: Gunhee Koo, Ki Young Kim, Jaemook Choi, Hoon Sohn, Junyeon Chung
Publikováno v: Scopus-Elsevier
The latest displacement and velocity sensors such as LDV and LiDAR have limited application in large-scale civil structures, because it is difficult to find an appropriate sensor installation position on which the sensors can aim at the measurement p
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::264c272dbab89211380d74e33e2ed605
http://www.scopus.com/inward/record.url?eid=2-s2.0-85032378389&partnerID=MN8TOARS
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