Expansion of measurement area of three-dimensional deformation measurement speckle interferometry with same sensitivities in three directions under consideration of measurement sensitivity

2017 ◽  
Author(s):  
Yasuhiko Arai
Keyword(s):  
Three Dimensional ◽  
Speckle Interferometry ◽  
Deformation Measurement ◽  
Measurement Sensitivity ◽  
Measurement Area

Spatial carrier color digital speckle pattern interferometry for absolute three-dimensional deformation measurement

2017 ◽  
Vol 56 (6) ◽  
pp. 066107 ◽  
Author(s):  
Xinya Gao ◽  
Yonghong Wang ◽  
Junrui Li ◽  
Xizuo Dan ◽  
Sijin Wu ◽  
...  
Keyword(s):  
Speckle Pattern ◽  
Three Dimensional ◽  
Deformation Measurement ◽  
Digital Speckle Pattern Interferometry ◽  
Digital Speckle

scholarly journals Spatial Baseline Optimization for Spaceborne Multistatic SAR Tomography Systems

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 2106 ◽  
Author(s):  
Jiuchao Zhao ◽  
Anxi Yu ◽  
Yongsheng Zhang ◽  
Xiaoxiang Zhu ◽  
Zhen Dong
Keyword(s):  
Surface Deformation ◽  
Design Method ◽  
Geometric Model ◽  
Three Dimensional ◽  
Optimization Method ◽  
Deformation Measurement ◽  
Experimental Simulation ◽  
Baseline Design ◽  
Imaging Performance ◽  
The Impact

Spaceborne multistatic synthetic aperture radar (SAR) tomography (SMS-TomoSAR) systems take full advantage of the flexible configuration of multistatic SAR in the space, time, phase, and frequency dimensions, and simultaneously achieve high-precision height resolution and low-deformation measurement of three-dimensional ground scenes. SMS-TomoSAR currently poses a series of key issues to solve, such as baseline optimization, spatial transmission error estimation and compensation, and the choice of imaging algorithm, which directly affects the performance of height-dimensional imaging and surface deformation measurement. This paper explores the impact of baseline distribution on height-dimensional imaging performance for the baseline optimization issue, and proposes a feasible baseline optimization method. Firstly, the multi-base multi-pass baselines of an SMS-TomoSAR system are considered equivalent to a group of multi-pass baselines from monostatic SAR. Secondly, we establish the equivalent baselines as a symmetric-geometric model to characterize the non-uniform characteristic of baseline distribution. Through experimental simulation and model analysis, an approximately uniform baseline distribution is shown to have better SMS-TomoSAR imaging performance in the height direction. Further, a baseline design method under uniform-perturbation sampling with Gaussian distribution error is proposed. Finally, the imaging performance of different levels of perturbation is compared, and the maximum baseline perturbation allowed by the system is given.

A Novel Method for Hull's Three Dimensional Deformation Measurement

2013 ◽  
Vol 344 ◽  
pp. 93-98 ◽  
Author(s):  
Xin Ming Liu ◽  
Yao Yu Zhang ◽  
Xiao Yong Feng ◽  
Qian Xue Wang
Keyword(s):  
Optical Sensor ◽  
Twist Angle ◽  
Three Dimensional ◽  
Angle Measurement ◽  
Deformation Measurement ◽  
Dynamic Experiments ◽  
Moire Fringe ◽  
Novel Method ◽  
Moiré Fringe ◽  
Dynamic States

In this paper, a novel method for hulls three-dimensional angle measurement is presented. For the measurement of the transverse twist angle, a method based on moiré fringe is proposed, for the lengthways flexibility and course flexibility angle the conventional optical sensor method is applied. The principle of the measurement is discussed in detail. To verify the accuracy of the proposed method, both static and dynamic experiments are carried out. Results show that in the static states, the accuracy for them are smaller than 5'', in the dynamic states, the accuracy for them are smaller than 10''.

A Sensor Suite for Toeboard Three-Dimensional Deformation Measurement During Crash

2020 ◽  
Author(s):  
Mengyu Song ◽  
Cong Chen ◽  
Tomonari Furukawa ◽  
Azusa Nakata ◽  
Shinsuke Shibata
Keyword(s):  
Three Dimensional ◽  
Deformation Measurement ◽  
Sensor Suite
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