摘要
针对当前地铁人防门无门位置检测的功能,存在人防门侵入列车限界的安全隐患问题,提出了一种基于视觉测量的门位置检测方法;通过在人防门背面设置标定物,利用架设在门背后的相机采集标定物图像,对图像进行预处理后,利用获得的相机外参数,并由此实现标定物上坐标已知3个特征点的坐标转换,根据空间几何知识求解出相机光心到人防门平面的垂直距离和门转过的角度;实验结果表明,该方法测量的人防门角度检测精度在1°以内,距离检测精度在25mm以内,满足人防门检测精度要求。
Aiming at the lack of door position detection function of subway civil air defence doors at present,there is a hidden danger that the civil air defense doors intrude into the boundaries of trains.A method of detecting the door position based on visual measurement is proposed.By setting the calibrator on the back of the civil air defense door,using the camera mounted on the back of the door to collect the image of the calibrator,after preprocessing the image,using the acquired external parameters of the camera,and thus realizing the coordinate conversion of the three characteristic points on the calibrator whose coordinates are known,according to the spatial geometry knowledge,the vertical distance from the camera’s optical center to the plane of the civil air defense door and the angle of the door’s rotation are calculated.The experimental results show that the angle detection accuracy of the air defence door measured by this method is less than 1 degree and the distance detection accuracy is less than 25 mm,which meets the requirements of the air defence door detection accuracy.
作者
屈霞
贡启明
Qu Xia;Gong Qiming(College of Mechanical Engineering,Changzhou University,Changzhou 213100,China)
出处
《计算机测量与控制》
2020年第4期57-61,109,共6页
Computer Measurement &Control
关键词
人防门
位置检测
视觉测量
外参数
单目视觉
civil air defense gate
position detection
visual measurement
external parameters
monocular vision
