In situ monitoring of electrosprayed water microdroplets using laser and LED light attenuation technique: Comparison with ultra-high-speed camera imaging

2021 ◽  
Vol 129 (18) ◽  
pp. 183305
Author(s):  
Mário Janda ◽  
Mostafa E. Hassan ◽  
Viktor Martišovitš ◽  
Karol Hensel ◽  
Michal Kwiatkowski ◽  
...  
Keyword(s):  
High Speed ◽  
Light Attenuation ◽  
In Situ Monitoring ◽  
High Speed Camera ◽  
Led Light ◽  
Camera Imaging ◽  
Ultra High Speed ◽  
Technique Comparison

High-Speed Camera Imaging of the Ignition Process in a Heaterless Hollow Cathode

2019 ◽  
Vol 47 (2) ◽  
pp. 1487-1491 ◽  
Author(s):  
Hai-Guang Zhang ◽  
Zhong-Xi Ning ◽  
Yong-Jie Ding ◽  
Xi-Ming Zhu ◽  
Bin-Hao Jiang ◽  
...  
Keyword(s):  
Hollow Cathode ◽  
High Speed ◽  
Ignition Process ◽  
High Speed Camera ◽  
Camera Imaging

Numerical and Experimental Analysis on the Operational Reliability of Rotating Mirror for Ultra-high Speed Camera

2011 ◽  
Vol 40 (10) ◽  
pp. 1484-1489
Author(s):  
余春晖 YU Chun-hui ◽  
李春波 LI Chun-bo ◽  
柴金龙 CHAI Jin-long ◽  
江展洪 JIANG Zhan-hong ◽  
李景镇 LI Jing-zhen ◽  
...  
Keyword(s):  
Experimental Analysis ◽  
High Speed ◽  
Operational Reliability ◽  
High Speed Camera ◽  
Ultra High Speed

Design of rotating mirror for ultra-high speed camera based on dynamic characteristic

2011 ◽  
Vol 23 (12) ◽  
pp. 3395-3399
Author(s):  
李春波 Li Chunbo ◽  
余春晖 Yu Chunhui ◽  
柴金龙 Chai Jinlong ◽  
梁业兴 Liang Yexing ◽  
刘春平 Liu Chunping ◽  
...  
Keyword(s):  
Dynamic Characteristic ◽  
High Speed ◽  
High Speed Camera ◽  
Ultra High Speed

Uniaxial High-Speed Micro-Scale Three-Dimensional Surface Topographical Measurements Using Fringe Projection

2020 ◽  
Author(s):  
Yi Zheng ◽  
Beiwen Li
Keyword(s):  
High Speed ◽  
Sample Surface ◽  
3D Scanning ◽  
In Situ Monitoring ◽  
Fringe Projection ◽  
Depth Information ◽  
Projection Technique ◽  
Projection System ◽  
Loop Control

Abstract In-situ inspection has drawn many attentions in manufacturing due to the importance of quality assurance. Having an accurate and robust in-situ monitoring can assist corrective actions for a closed-loop control of a manufacturing process. The fringe projection technique, as a variation of the structured light technique, has demonstrated significant potential for real-time in-situ monitoring and inspection given its merits of conducting simultaneous high-speed and high accuracy measurements. However, high-speed 3D scanning methods like fringe projection technique are typically based on triangulation principle, meaning that the depth information is retrieved by analyzing the triangulation relationship between the light emitter (i.e., projector), the image receiver (i.e., camera) and the tested sample surface. Such measurement scheme cannot reconstruct 3D surfaces where large geometrical variations are present, such as a deep-hole or a stair geometry. This is because large geometrical variations will block the auxiliary light used in the triangulation based methods, which will resultantly cause a shadowed area to occur. In this paper, we propose a uniaxial fringe projection technique to address such limitation. We measured a stair model using both conventional triangulation-based fringe projection technique and the proposed method for comparison. Our experiment demonstrates that the proposed uniaxial fringe projection technique can perform high-speed 3D scanning without shadows appearing in the scene. Quantitative testing shows that an accuracy of 1.15% can be obtained using the proposed uniaxial fringe projection system.

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