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Journal Article 5

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2022 2

2018 1

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Electromagnetic induction 1

Geophysics 1

LIDAR survey 1

LiDAR 1

Lidar 1

Light detection and ranging (LiDaR) 1

Lithology 1

Long-term 1

Robustness 1

Simultaneous localization and mapping (SLAM) 1

Visual inertial LiDaR navigation (VILN) 1

dam monitoring 1

full-scale testing 1

geostatistical analysis 1

internal erosion 1

laser vibrometer 1

remote sensing 1

seepage detection 1

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Novel robust simultaneous localization and mapping for long-term autonomous robots Research Articles

Wei WEI, Xiaorui ZHU, Yi WANG,weirui9003@gmail.com,xiaoruizhu@hit.edu.cn,wangyi601@aliyun.com

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 2, Pages 234-245 doi: 10.1631/FITEE.2000358

Abstract: propose a novel robust visual inertial navigation (VILN) SLAM system, including stereo visual-inertial LiDaRodometry and visual-LiDaR loop closure.The proposed VILN SLAM system can perform well with low drift after experiments, even when the LiDaR

Keywords： Simultaneous localization and mapping (SLAM) Long-term Robustness Light detection and ranging (LiDaR) Visual inertial LiDaR navigation (VILN)

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On-Chip LiDAR Technology Advances for Cars, Cell Phones

Mitch Leslie

Engineering 2022, Volume 18, Issue 11, Pages 3-5 doi: 10.1016/j.eng.2022.09.003

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Embankment dam foundation analysis for the decrease of internal erosion likelihood

Marc SMITH

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4, Pages 431-436 doi: 10.1007/s11709-012-0183-5

Abstract: A zoned embankment dam is founded on clay underlain by a sand deposit. Major seepage phenomena were noticed in the foundation downstream from the dam where the vertical seepage forces in the sand layer were expected to exceed the downward forces due to the overlying clay. Modern technologies were applied to delineate critical zones to help design optimal rehabilitation measures. A global electromagnetic survey was carried out to detect and map the main sources, pathways and exits of seepage. Based on these global findings, a more detailed analysis was then conducted to identify zones where thickness of the foundation clay is minimal, pore pressures in sand are higher and thus where the factor of safety against uplift is lower and internal erosion is more likely to occur. Clay thickness evaluation required the determination of land surface as well as clay-sand contact elevations. A laser airborne survey was performed to model the land surface elevation. Data concerning the clay-sand contact elevation came from the interpreted stratigraphy based on a series of boreholes and cone penetration tests. This data was combined in a geostatistical model along with the measured piezometric levels in the foundation. This resulted in a contour map showing factors of safety against uplift over the entire downstream area. The use of modern technologies, namely electromagnetic and laser surveys as well as geostatistical tools, was instrumental in defining the limits of an otherwise spread-out problem and to provide an optimal solution, in terms of costs and effectiveness, for the long-term stabilization of the foundation.

Keywords： seepage detection geostatistical analysis dam monitoring internal erosion LIDAR survey

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Spatial Discrimination of Complex, Low-Relief Quaternary Siliciclastic Strata Using Airborne Lidar and Article

Jeffrey G. Paine,Edward W. Collins,Lucie Costard

Engineering 2018, Volume 4, Issue 5, Pages 676-684 doi: 10.1016/j.eng.2018.09.005

Abstract: High-resolution airborne lidar surveys, along with surface and borehole geophysical measurements, areHigh-resolution digital elevation models obtained from airborne lidar surveys reveal previously unrecognizedlithologic and stratigraphic distribution in low-relief coastal-plain environments employs ① an initial lidar② selective surface sampling and geophysical measurements based on preliminary mapping derived from lidardata and aerial imagery; and ③ borehole sampling, logging, and analysis at key sites selected after lidar

Keywords： Lithology Geophysics Electromagnetic induction Lidar

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Novel sensing techniques for full-scale testing of civil structures

Kaoshan DAI, Zhenhua HUANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3, Pages 240-256 doi: 10.1007/s11709-012-0172-8

Abstract: Performing full-scale structural testing is an important methodology for researchers and engineers in the civil engineering industry. Full scale testing helps the researchers understand civil infrastructures’ loading scenarios, behaviors, and health conditions. It helps the engineers verify, polish, and simplify the structural design and analysis theories. To conduct a full-scale structural testing, sensors are used for data acquisitions. To help structural researchers and engineers get familiar with sensing technologies and select the most effective sensors, this study reviewed and categorized new sensing techniques for full-scale structural testing applications. The researchers of this study categorized sensors used for civil-infrastructure testing into traditional contact sensors and remote sensors based upon their application methodologies, and into cabled sensors and wireless sensors based upon their data communication strategies. The detailed descriptions of wireless sensors and remote sensing techniques and their on-site full-scale applications are presented.

Keywords： sensing technique full-scale testing wireless sensor remote sensing LiDAR laser vibrometer