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基于单目视觉传感器的车距测量与误差分析 被引量:18
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作者 余厚云 张为公 《传感器与微系统》 CSCD 北大核心 2012年第9期10-13,共4页
为了解决结构化道路上基于单目视觉的运动车辆车距测量问题,从针孔模型下摄像机成像的基本原理出发,推导出基于图像中车道线消失点的车距计算公式。车距测量结果只与图像中的近视场点到摄像机的实际距离有关,而无需对所有的摄像机参数... 为了解决结构化道路上基于单目视觉的运动车辆车距测量问题,从针孔模型下摄像机成像的基本原理出发,推导出基于图像中车道线消失点的车距计算公式。车距测量结果只与图像中的近视场点到摄像机的实际距离有关,而无需对所有的摄像机参数进行标定。分析了车距测量中的误差因素,并在前方道路上设置已知距离的横向标线,完成了摄像机不同安装高度、俯仰角及方向角情况下的标线距离测量实验。通过与实际距离比较发现,摄像机安装高度与方向角的微小变化对车距测量的影响可以忽略,而摄像机俯仰角的变化将引起较大的车距测量误差。最后,完成了不同距离处前方车辆车距测量实验,实验结果表明:采用上述方法的车距测量相对误差小于3%,具备了较高的检测精度。 展开更多
关键词 车辆避撞系统 单目视觉 车距测量 误差分析
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一种能隔墙探物的无线超宽频技术
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《中国传媒科技》 2003年第3期21-21,共1页
关键词 超宽频无线技术 UWB 车辆避撞系统 移动通信 雷达成像
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Human Body Behavior as Response on Autonomous Maneuvers, Based on ATD and Human Model
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作者 Marcin Mirostaw Dominik Jastrzebski 《Journal of Mechanics Engineering and Automation》 2015年第9期497-502,共6页
In the near future, active safety systems will take more control over the vehicle driving, even up to introducing fully autonomous vehicles. Nowadays, it is expected that the active safety systems will aid avoiding co... In the near future, active safety systems will take more control over the vehicle driving, even up to introducing fully autonomous vehicles. Nowadays, it is expected that the active safety systems will aid avoiding collisions much more efficiently than human drivers. These systems can protect not only the passengers, but also other road users. To mitigate collision, certain maneuvers (e.g., sudden braking, lane change, etc.) need to be done in a reasonably quick time. However, this may lead to low-g energy pulses. The latter fact, may cause unexpected and, in some cases, unwanted occupant body motion resulting even in OOP (out of position) postures. New patterns of occupant reactions in such cases are, to some extent, confirmed experimentally [1-3]. This paper evaluates the limits of standard ATDs (anthropometric test devices) and chosen human models in well established maneuver scenarios. Obtained results are compared with experimental data available in the literature. Drawbacks identify new challenges for the near future simulation based safety engineering. One scenario with combined conditions of emergency braking during lane change has been used as an example of OOP posture after maneuver. 展开更多
关键词 Active safety systems passive safety systems autonomous maneuvers human body behavior.
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