Precise positioning method for multi-process connecting based on binocular vision

2016 ◽  
Author(s):  
Wei Liu ◽  
Lichao Ding ◽  
Kai Zhao ◽  
Xiao Li ◽  
Ling Wang ◽  
...  
Keyword(s):  
Binocular Vision ◽  
Precise Positioning ◽  
Positioning Method

Fast Precise Positioning of Circular Mark in Automatic Optical Inspection

2013 ◽  
Vol 325-326 ◽  
pp. 1614-1618
Author(s):  
Guang Jie Xiong ◽  
Yu Fei Liu ◽  
Rui Zhen Liu
Keyword(s):  
Printed Circuit Boards ◽  
Positioning Error ◽  
Circuit Boards ◽  
Precise Positioning ◽  
Automatic Optical Inspection ◽  
Running Time ◽  
Printed Circuit ◽  
Optical Inspection ◽  
Positioning Method ◽  
The Difference

Captured circular marks are deformed sometimes when Automatic Optical Inspection (AOI) is used to detect various defects on Printed Circuit Boards (PCB), which may affect the precision of inspection. A new accurate positioning method of circular marks is proposed to solve the problem by obtaining the center of the most round ellipse based on the criterion that the ratio of the difference between the length and width of its circumscribed rectangle and the width of the rectangle is less than 0.1. The simulation tests show that, if the mark has much more deformations, the center positioning error of the proposed algorithm is about 0.013 pixels, and the running time is less than 40ms. Therefore, the proposed method provides good characteristics such as speediness, strong anti-interference ability and robustness.

Development of Wire-Connected Mechanism for Precise Positioning

2012 ◽  
Vol 523-524 ◽  
pp. 645-649 ◽  
Author(s):  
Masahiro Shinoda ◽  
Shinnosuke Hirata ◽  
Hisayuki Aoyama
Keyword(s):  
Work Environment ◽  
Piezoelectric Element ◽  
Positioning System ◽  
Precision Positioning ◽  
Precise Positioning ◽  
Micro Assembly ◽  
Nano Scale ◽  
Positioning Method

Micro/nano positioning is one of important techniques to operate bio-cell and micro assembly. For realizing the precise positioning, the various piezo-driven stages have been already proposed and micro/nano scale resolution has been achieved. However, it is pointed out that the existing precision positioning tools are too large compared to operating area. Their devices are too difficult to combine other devices and use in tight environment like under microscope. In this paper, a precise positioning method with wire connected mechanism under microscope is proposed. The proposed positioning system is simply composed actuators including piezoelectric element and super extra-fine wires. By applying wire connected mechanism, the saving of larger work environment compared to traditional devices is hoped.

A new precise positioning method for piezoelectric scanner of AFM

2019 ◽  
Vol 196 ◽  
pp. 67-73 ◽  
Author(s):  
Yanyan Wang ◽  
Sen Wu ◽  
Linyan Xu ◽  
Yanan Zeng
Keyword(s):  
Precise Positioning ◽  
Positioning Method

scholarly journals A Study on Precise Positioning for an Electric Vehicle Wireless Power Transfer System Using a Ferrite Antenna

Electronics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 1289
Author(s):  
Jae Yong Seong ◽  
Sang-Sun Lee
Keyword(s):  
Electromagnetic Interference ◽  
Wireless Power Transfer ◽  
Power Transfer ◽  
Wireless Power ◽  
Component Level ◽  
Precise Positioning ◽  
Charging Infrastructure ◽  
Power Transfer Efficiency ◽  
Positioning Method ◽  
The Relationship

In the last decade, engineers from automotive manufacturers and charging infrastructure suppliers have widely studied the application of wireless power transfer (WPT) technology to electric vehicles. Since this time, engineers from automotive manufacturers have studied precise positioning methods suitable for WPT using methods such as mechanical, communication-based or video-based. However, due to high costs, electromagnetic interference and environmental factors, the experts of the SAE J2954 was focused on the WPT’s precise positioning method by ferrite antennas and low power excitation. In this study, we present how to use the ferrite antennas to find a central alignment point between the primary and secondary units within the alignment tolerance area that requires the minimum power transfer efficiency of the EV WPT system. First, we analyze the ferrite antenna already applied in the automotive and verifies whether it is suitable for the precise positioning of the WPT system for EV. We use modeling and simulation to show that it is necessary to calculate all induced loop voltages in the relationship between incident magnetic field signal strength and induced loop voltage because of the short distance between the transmitter and receiver of the ferrite antenna in WPT. In addition, we also suggest a sequence to find the fitting location of the ferrite antenna, the number of antennas used and the center alignment point. After the simulation is performed on the suggestions, component-level and vehicle-level tests were conducted to verify the validity of the simulation results. As a result, it is shown that a ferrite antenna is suitable as a method for the secondary device to find the center alignment point of the primary device.

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