A high precision visual localization sensor and its working methodology for an indoor mobile robot

Feng-yu ZHOU; Xian-feng YUAN; Yang YANG; Zhi-fei JIANG; Chen-lei ZHOU

doi:10.1631/FITEE.1500272

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A high precision visual localization sensor and its working methodology for an indoor mobile robot

Special Issue on Distributed Computing and Artificial Intelligence | Updated：2022-05-19

- A high precision visual localization sensor and its working methodology for an indoor mobile robot
- 一种室内移动机器人高精度视觉定位传感器及其工作原理
- Frontiers of Information Technology & Electronic Engineering Vol. 17, Issue 4, Pages: 365-374(2016)
- Affiliations：
  
  1School of Control Science and Engineering, Shandong University, Jinan 250061, China
  2School of Information Science and Engineering, Shandong University, Jinan 250100, China
- Author bio：
  
  E-mail:zhoufengyu@sdu.edu.cn
  E-mail:yuanxianfeng_sdu@126.com
- Funds：
- DOI：10.1631/FITEE.1500272
  CLC： TP242.6
- Received：21 August 2015，
  
  Accepted：13 January 2016，
  
  Published：2016-04
- Accepted：
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Feng-yu ZHOU, Xian-feng YUAN, Yang YANG, et al. A high precision visual localization sensor and its working methodology for an indoor mobile robot[J]. Frontiers of Information Technology & Electronic Engineering, 2016, 17(4): 365-374.
DOI：

Feng-yu ZHOU, Xian-feng YUAN, Yang YANG, et al. A high precision visual localization sensor and its working methodology for an indoor mobile robot[J]. Frontiers of Information Technology & Electronic Engineering, 2016, 17(4): 365-374. DOI： 10.1631/FITEE.1500272.

摘要

目的

高精度定位与导航是室内移动机器人高质量完成服务任务的基本前提。但现有的定位传感器大多难以满足服务机器人的室内定位精度要求。为了克服现有的移动机器人定位传感器定位精度低、鲁棒性差的问题，本文设计了一种基于红外反射人工标签的嵌入式视觉定位传感器，并提出了一种新颖的概率型视觉定位方法。

创新点

设计了一种高精度嵌入式视觉定位传感器，提出了一种概率型视觉定位方法。

方法

首先，设计了视觉定位传感器的硬件系统；然后，设计了一种红外反射标签，并给出了红外标签识别及置信度建模的方法；最后，利用P3P定位方法计算出机器人与红外标签的相对位置关系，并进一步解算得到机器人在世界坐标系下的位姿，实现了机器人高精度概率型视觉定位。

结论

通过多组实验证明了所设计的机器人定位传感器受光线及视角影响小，位置定位精度为±1.94 cm

角度定位精度为±1.64°，满足了室内移动机器人的定位精度要求。

Abstract

To overcome the shortcomings of existing robot localization sensors

such as low accuracy and poor robustness

a high precision visual localization system based on infrared-reflective artificial markers is designed and illustrated in detail in this paper. First

the hardware system of the localization sensor is developed. Secondly

we design a novel kind of infrared-reflective artificial marker whose characteristics can be extracted by the acquisition and processing of the infrared image. In addition

a confidence calculation method for marker identification is proposed to obtain the probabilistic localization results. Finally

the autonomous localization of the robot is achieved by calculating the relative pose relation between the robot and the artificial marker based on the perspective-3-point (P3P) visual localization algorithm. Numerous experiments and practical applications show that the designed localization sensor system is immune to the interferences of the illumination and observation angle changes. The precision of the sensor is 1.94 cm for position localization and 1.64 for angle localization. Therefore

it satisfies perfectly the requirements of localization precision for an indoor mobile robot.

关键词

Keywords

references

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