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A Study of Sensor-Fusion Mechanism for Mobile Robot Global Localization

Published online by Cambridge University Press:  22 April 2019

Yonggang Chen
Affiliation:
School of Electro-mechanical Engineering, Guangdong University of Technology, Guangzhou, China. E-mails: leizhu1016@gmail.com, ysguan@gdut.edu.cn Department of Electro-mechanical Engineering, Dongguan Polytechnic, Dongguan, China. E-mail: yonggang44@163.com
Weinan Chen*
Affiliation:
School of Electro-mechanical Engineering, Guangdong University of Technology, Guangzhou, China. E-mails: leizhu1016@gmail.com, ysguan@gdut.edu.cn
Lei Zhu
Affiliation:
School of Electro-mechanical Engineering, Guangdong University of Technology, Guangzhou, China. E-mails: leizhu1016@gmail.com, ysguan@gdut.edu.cn
Zerong Su
Affiliation:
Guangdong Key Laboratory of Modern Control Technology, Guangdong Institute of Intelligent Manufacturing, Guangzhou, China. E-mails: zr.su@giim.ac.cn, xuefengzhou@vip.qq.com
Xuefeng Zhou
Affiliation:
Guangdong Key Laboratory of Modern Control Technology, Guangdong Institute of Intelligent Manufacturing, Guangzhou, China. E-mails: zr.su@giim.ac.cn, xuefengzhou@vip.qq.com
Yisheng Guan
Affiliation:
School of Electro-mechanical Engineering, Guangdong University of Technology, Guangzhou, China. E-mails: leizhu1016@gmail.com, ysguan@gdut.edu.cn
Guanfeng Liu
Affiliation:
Guangdong Polytechnic Normal University, Guangzhou, China. E-mail: liugf1004@gmail.com
*
*Corresponding author. E-mail: weinanchen1991@gmail.com
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Estimating the robot state within a known map is an essential problem for mobile robot; it is also referred to “localization”. Even LiDAR-based localization is practical in many applications, it is difficult to achieve global localization with LiDAR only for its low-dimension feedback, especially in environments with repetitive geometric features. A sensor-fusion-based localization system is introduced in this paper, which has the capability of addressing the global localization problem. Both LiDAR and vision sensors are integrated, making use of the rich information introduced by vision sensor and the robustness from LiDAR. A hybrid grid-map is built for global localization, and a visual global descriptor is applied to speed up the localization convergence, combined with a pose refining pipeline for improving the localization accuracy. Also, a trigger mechanism is introduced to solve kidnapped problem and verify the relocalization result. The experiments under different conditions are designed to evaluate the performance of the proposed approach, as well as a comparison with the existing localization systems. According to the experimental results, our system is able to solve the global localization problem, and the sensor-fusion mechanism in our system has an improved performance.

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Type
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Copyright
© Cambridge University Press 2019 

Chen et al. supplementary material

Chen et al. supplementary material

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