Vision-Aided Brush Alignment Assembly System for Precision Conductive Slip Rings

Chen, Xiaobo; Wang, Yukun; Sheng, Ying; Yu, Cheng-Yi; Yang, Xin; Xi, Juntong

doi:10.3390/machines10050393

Cited by 6 publications

(3 citation statements)

References 13 publications

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“…It needs to point out that the camera must be placed outside a water-filled tank or in a waterproof housing with a flat glass window during the whole underwater calibration experiment. Meanwhile, the specific underwater calibration procedures 28 are accomplished using a high-precision circular calibration board with an array of 7×7 circular marker points.…”

Section: Methodsmentioning

confidence: 99%

Forward projection multilayer refraction model for underwater camera calibration

Wang

Fan

et al. 2022

Opt. Eng.

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Unlike imaging in air, underwater imaging is affected by two distinct properties of water: the absorption and scattering effect of water and the refraction effect of water, resulting in the conventional pinhole model no longer being suitable for underwater imaging. Therefore, without prior calibration in air to calculate the camera intrinsic parameters and distortions for subsequent underwater calibration, an underwater multilayer refraction model based on forward projection method is represented. Along the direction of light propagation, the multilayer refraction model presents a unified scale factor instead of focal length during the perspective projection transformation from the camera coordinate system to the image coordinate system. Simulations regarding the analysis of different medium thicknesses, different medium refractive indices, and different point pixels are performed to explore the influence of the above three parameters on the refraction model. Through the underwater parameter identification and verification, the proposed multilayer refraction model has high measurement accuracy, excellent solution efficiency, stable identification results, more identification parameters, and wide application fields, which are suitable for both single-time refraction and double-time refraction.

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Section: Methodsmentioning

confidence: 99%

Forward projection multilayer refraction model for underwater camera calibration

Wang

Fan

et al. 2022

Opt. Eng.

Self Cite

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“…In order to improve the contact quality and service life of the brush wire, many scholars have focused on controlling the brush wire contact deviation, brush wire assembly and friction heat [7][8][9]. Sun Yuanhang et al quantized the influence of thermo-electric multi-field coupling on the overall slip ring, and predicted the life of the friction pair [10]; wang Yueze et al used the finite element analysis method to quantitatively analyze the SINS angle error caused by temperature excitation through numerical simulation and verified it.…”

Section: Introductionmentioning

confidence: 99%

Simulation analysis of local temperature field of electric propulsion slip ring

Bin

2024

Vib. proced.

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The temperature at which the carbon brushes and the structure of the rings in the electric propulsion slip ring operate has a crucial influence on the safe and reliable operation of the ship. In order to control the temperature of the local structure of the electric propulsion slip ring, this study established a carbon brush and ring piece model through finite element simulation analysis and designed a five-factor, four-level orthogonal test to derive the sensitivity of the final temperature influence factor: initial temperature > current > wind speed > pressure > speed; the optimal combination of parameters is obtained: initial temperature 35 °C, pressure 25 N, speed 5 rpm, wind speed 0.20 m/s, and current 40 A, and the optimal parameters are substituted for the temperature field simulation. The results show that the relatively large area of temperature is distributed on the carbon brushes with a maximum value of 58.3 °C, which is relatively reasonable in size and distribution; the relatively large area of potential is distributed on the carbon brushes, the maximum value of which is 0.3V The entire potential distribution is symmetrical, indicating a reasonable current path; the relatively large area of current density distribution is on the carbon brushes with a value of 64.7 A/cm2, the entire current density distribution is symmetrical and corresponds to the potential distribution, which, together with the frictional rotation, corresponds to the temperature distribution, indicating that the simulation results have a certain degree of reliability.

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“…The research results provide a reference basis for revealing the changing microscopic mechanism of the friction and wear properties of Au-Au coating with temperature and speed and provide a theoretical basis for the design of long-life and high-reliability satellites in China. Chen [7] proposed a machine vision-aided method to measure the ring groove position as the brush alignment target and track the relative brush position deviation during the manual brush alignment assembly process. A vision-assisted brush alignment component system has also been developed to provide quantitative position deviation for the accurate alignment of brushes and ring grooves, ensuring higher alignment accuracy and efficiency.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Kinematics and Dynamics of Rolling Ring Based on Finite Element Method

Wu,

Liu,

Qian

et al. 2024

Electronics

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The working performance of the conductive rolling ring has a crucial impact on the overall energy security and on-orbit life of a satellite. To ensure the real-time transmission of signal and current, it is necessary to control the motion pattern of the rolling ring. In this paper, the finite element analysis method is used to carry out kinematics and dynamics simulation analysis, analyze the motion stability of the rolling ring, and discuss the relationship between the size of the idler gear, the driving torque, and the flexible contact pressure. The research results show that the numerical simulation and theoretical analysis show that the deviation angle is between 0 and 1.52 when the initial installation of the rolling ring is deviated by using the existing camber design of the inner and outer rings. Both have a self-recovery function. The driving torque and the size of the idler gear are nonlinear, and the contact force is proportional to the radius of the idler gear. With the increase in the compression of the radius of the flexible ring, the driving torque and the contact force will increase accordingly. The method of reducing the compression or increasing the size of the idler gear can be used to reduce the driving torque and maintain a certain contact to facilitate the transmission of electrical signals.

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Vision-Aided Brush Alignment Assembly System for Precision Conductive Slip Rings

Cited by 6 publications

References 13 publications

Forward projection multilayer refraction model for underwater camera calibration

Forward projection multilayer refraction model for underwater camera calibration

Simulation analysis of local temperature field of electric propulsion slip ring

Analysis of Kinematics and Dynamics of Rolling Ring Based on Finite Element Method

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