scholarly journals Development of an Integrated Laser Sensors Based Measurement System for Large-Scale Components Automated Assembly Application

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 45646-45654 ◽  
Author(s):  
Gaoliang Peng ◽  
Yu Sun ◽  
Shilong Xu
Measurement ◽  
2021 ◽  
pp. 110426
Author(s):  
Yuanpeng Liu ◽  
Jun Zhou ◽  
Yida Li ◽  
Yuqi Zhang ◽  
Yongqiang He ◽  
...  

Author(s):  
S. Gao ◽  
Z. Ye ◽  
C. Wei ◽  
X. Liu ◽  
X. Tong

<p><strong>Abstract.</strong> The high-speed videogrammetric measurement system, which provides a convenient way to capture three-dimensional (3D) dynamic response of moving objects, has been widely used in various applications due to its remarkable advantages including non-contact, flexibility and high precision. This paper presents a distributed high-speed videogrammetric measurement system suitable for monitoring of large-scale structures. The overall framework consists of hardware and software two parts, namely observation network construction and data processing. The core component of the observation network is high-speed cameras to provide multiview image sequences. The data processing part automatically obtains the 3D structural deformations of the key points from the captured image sequences. A distributed parallel processing framework is adopted to speed up the image sequence processing. An empirical experiment was conducted to measure the dynamics of a double-tube five-layer building structure on the shaking table using the presented videogrammetric measurement system. Compared with the high-accuracy total station measurement, the presented system can achieve a sub-millimeter level of coordinates discrepancy. The 3D deformation results demonstrate the potential of the non-contact high-speed videogrammetric measurement system in dynamic monitoring of large-scale shake table tests.</p>


2015 ◽  
Vol 54 (10) ◽  
pp. 105108 ◽  
Author(s):  
Yang Zhang ◽  
Wei Liu ◽  
Xiaodong Li ◽  
Fan Yang ◽  
Peng Gao ◽  
...  

Author(s):  
Ragessi I. Matias ◽  
Leyria Rainieri Gianina ◽  
Ganancias Facundo ◽  
García C. Marcelo ◽  
Di Buo Melina ◽  
...  

Abstract The Costa Azul wastewater treatment plant is situated in Carlos Paz city (Córdoba, Argentina). The treated water is discharged to the San Roque reservoir, which is the source of water for the city of Córdoba and surrounding towns. Consequently, it is of great importance to evaluate the potential impact on the water quality reservoir for the preservation of public health. Currently, the WWTP lacks an accurate flow monitoring system at the last treatment: disinfection. This problem led to the development of a methodology in which experimental in-situ work and computational fluid dynamics (CFD) were applied, in a combined way, to calibrate the flow measurement system. First, Large Scale Particle Image Velocimetry (LS-PIV) was applied. The results made it possible to obtain characteristic parameters of the average flow: cross-sectional velocity profiles, recirculation and flow stagnation zones, flow discharge and characteristic parameters of the contact chamber. Second, numerical models, based on the Reynolds-average Navier–Stokes equations with the k–ε turbulent closure model were used. Based on the simulations results, it was possible to calibrate the discharge equation for a rectangular weir, and elaborate recommendations to improve the discharge measurement system and hydraulics in the area of the contact chamber curves.


2007 ◽  
Vol 25 (8) ◽  
pp. 1234-1242 ◽  
Author(s):  
Ryo Kurazume ◽  
Yukihiro Tobata ◽  
Kouji Murakami ◽  
Tsutomu Hasegawa

2019 ◽  
Vol 48 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Duan Xiangyu ◽  
Zhu Liqiang ◽  
Yu Zujun ◽  
Xu Xining

Continuous Welded Rail (CWR) is widely used in modern railways. With the absence of the expansion joints, CWR cannot expansion freely when the temperature changes, which could cause buckling in hot weather or breakage in cold weather. Therefore, rail thermal stress measuring system plays an important role in the safe operation of railways. This paper designed a thermal stress measurement system based on the acoustoelastic effect of the ultrasonic guided wave. A large-scale rail testbed was built to simulate the thermal stress in the rail track, and to establish the relationship of time-delay of guided wave and thermal stress. After laboratory testing, the system was installed in several railway lines in China for field tests. The results showed that the system was stable and accurate in stress measurement. The performance and potentials of the system were discussed.


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