动态环境下移动机器人运动目标测速方法

Velocity measurement method of mobile robot for moving object in dynamic environ ment

摘要:

提出了基于Kinect摄像机的 机器视觉测速方法,用于实时的测量运用目标的速度信息。首先,设计出固定在运动目标上 的由 五个已知位置关系的圆组成的标识物,利用图像处理算法根据标志物的拓扑关系检测出运动 目标标志物在Kinect坐标系下 的位置；然后,将Kinect坐标系坐标通过坐标变换转换到世界坐标系；最后,根据采样时间 内测出的距离求出速度信息。通过 以上3步骤,依次解决运动目标检测和运动目标测速问题。理论分析和试验结果表明, 本文方法在移动机器人运动或者静止 情况下能够处理运动目标作直线运动、原地转动及其合成的曲线运动等不同运动形式下的速 度测量,应用范围广泛,计算实 时性和准确性高。

Abstract:

A novel method based on machine vision using Kinect camera is proposed to realize the real-time velocity measurement of moving object.Firstly,a moving object marker fixed on moving object is designed, which consists of five circles with certain position relation,and then the image processing algorithm is utilized to detect moving object marker position precisely in the Kinect coordinate system according to th e topological relationship of the object marker.Secondly,the coordinates in Kinect system are transformed to world c oordinate system.Finally,the velocity information is calculated with the distanc e in certain sampling time.Theoretical analysis and experimental results show that the method can be used to measure the velocity of the moving o bject in the form of linear motion,situ rotation and the synthetic curvilinear m otion,no matter the mobile robot is in the m otion or stationary situation.It has a wide range of applications with real-time computing and high accuracy.