Assessing joint integrity of a lug assembly using piezoelectric active sensors

2012 ◽  
Vol 19 (7) ◽  
pp. 621-631 ◽  
Author(s):  
Hye-Jin Shin ◽  
Chang-Yong Yun ◽  
Gyuhae Park ◽  
Kevin M. Farinholt ◽  
Jung-Ryul Lee ◽  
...  
Keyword(s):  
Active Sensors ◽  
Joint Integrity

scholarly journals A V-SLAM Guided and Portable System for Photogrammetric Applications

2021 ◽  
Vol 13 (12) ◽  
pp. 2351
Author(s):  
Alessandro Torresani ◽  
Fabio Menna ◽  
Roberto Battisti ◽  
Fabio Remondino
Keyword(s):  
Low Cost ◽  
Cost Effective ◽  
Motion Blur ◽  
Guidance System ◽  
Prototype System ◽  
Active Sensors ◽  
Localization And Mapping ◽  
Acquisition Speed ◽  
Mobile Mapping System ◽  
Slam Algorithm

Mobile and handheld mapping systems are becoming widely used nowadays as fast and cost-effective data acquisition systems for 3D reconstruction purposes. While most of the research and commercial systems are based on active sensors, solutions employing only cameras and photogrammetry are attracting more and more interest due to their significantly minor costs, size and power consumption. In this work we propose an ARM-based, low-cost and lightweight stereo vision mobile mapping system based on a Visual Simultaneous Localization And Mapping (V-SLAM) algorithm. The prototype system, named GuPho (Guided Photogrammetric System) also integrates an in-house guidance system which enables optimized image acquisitions, robust management of the cameras and feedback on positioning and acquisition speed. The presented results show the effectiveness of the developed prototype in mapping large scenarios, enabling motion blur prevention, robust camera exposure control and achieving accurate 3D results.

scholarly journals Integrated Active Sensors for Process Monitoring

2013 ◽  
Vol 10 (1) ◽  
pp. 33-36
Author(s):  
Mats Blomqvist ◽  
Ola Blomster ◽  
Hans Bergstrand
Keyword(s):  
Process Monitoring ◽  
Active Sensors

scholarly journals CloudSat and CALIPSO within the A-Train: Ten Years of Actively Observing the Earth System

2018 ◽  
Vol 99 (3) ◽  
pp. 569-581 ◽  
Author(s):  
Graeme Stephens ◽  
David Winker ◽  
Jacques Pelon ◽  
Charles Trepte ◽  
Deborah Vane ◽  
...  
Keyword(s):  
Vertical Structure ◽  
Hydrological Cycle ◽  
Integrated Approach ◽  
Climate Data ◽  
Multiple Perspectives ◽  
Active Sensors ◽  
Active Systems ◽  
Cloud Properties ◽  
The Earth ◽  
Radiance Data

Abstract One of the most successful demonstrations of an integrated approach to observe Earth from multiple perspectives is the A-Train satellite constellation. The science enabled by this constellation flourished with the introduction of the two active sensors carried by the National Aeronautics and Space Administration (NASA) CloudSat and the NASA–Centre National d’Études Spatiales (CNES) Cloud–Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellites that were launched together on 28 April 2006. These two missions have provided a 10-yr demonstration of coordinated formation flying that made it possible to develop integrated products and that offered new insights into key atmospheric processes. The progress achieved over this decade of observations, summarized in this paper, clearly demonstrate the fundamental importance of the vertical structure of clouds and aerosol for understanding the influences of the larger-scale atmospheric circulation on aerosol, the hydrological cycle, the cloud-scale physics, and the formation of the major storm systems of Earth. The research also underscored inherent ambiguities in radiance data in describing cloud properties and how these active systems have greatly enhanced passive observation. It is now clear that monitoring the vertical structure of clouds and aerosol is essential, and a climate data record is now being constructed. These pioneering efforts are to be continued with the Earth Clouds, Aerosol and Radiation Explorer (EarthCARE) mission planned for launch in 2019.

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