| 张旺,吴尉健,郭建钢,陈金山,刘丹丹.山区双车道公路弯道路段小型车左右行速度特性[J].井冈山大学自然版,2020,41(2):71-77 |
| 山区双车道公路弯道路段小型车左右行速度特性 |
| SPEED CHARACTERISTICS OF LEFT AND RIGHT OF SMALL CARS IN CURVED ROAD SECTIONS OF MOUNTAINOUS TWO-LANE ROADS |
| 投稿时间：2019-11-12 修订日期：2019-12-23 |
| DOI：10.3969/j.issn.1674-8085.2020.02.012 |
| 中文关键词: 双车道公路 弯道路段 小型车 左右行速度 |
| 英文关键词: two-lane road curve small vehicle speed of left and right |
| 基金项目:国家自然科学青年科学基金项目（51608123） |
| 作者 | 单位 | | 张旺 | 福建农林大学交通与土木工程学院, 福建, 福州 350002 | | 吴尉健 | 福建农林大学交通与土木工程学院, 福建, 福州 350002 | | 郭建钢 | 福建农林大学交通与土木工程学院, 福建, 福州 350002 | | 陈金山 | 福建农林大学交通与土木工程学院, 福建, 福州 350002 | | 刘丹丹 | 福建农林大学交通与土木工程学院, 福建, 福州 350002 |
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| 中文摘要: |
| 为研究山区双车道公路弯道路段小型车左右行速度特性，选取了8个弯道作为研究对象，使用无人机航拍获取小型车通过弯道路段的视频资料。使用图像识别技术及AE等软件获取车辆在弯道路段的左右行速度，分析其左右行速度总体差异，并借助Matlab拟合右行与左行速度差值与半径及坡度多项式关系。结果发现：左右行速度变化在入弯-出弯过程中均呈现减速-加速趋势；弯道半径大于30 m时，右行速度始终大于左行速度，小于30 m时，左右行速度变化曲线交叉，右行速度先大后小，且变化曲线可近似看成以曲中所在线为对称轴对称；左右行速度差值与半径及坡度满足多项关系式，坡度越小，半径越大，速度差值越大，可对差值较大的弯道左右行方向设置不同限速值。 |
| 英文摘要: |
| In order to study the left and right speed characteristics of small cars in curved road sections of mountainous two-lane roads，this paper selects 8 curves as the research object, and uses the unmanned aerial vehicle to obtain the video data of the small car passing the curve road section. Using image recognition technology and AE software to obtain the left and right line speed of the vehicle in the curve road section, we analyze the overall difference of the left and right line speed, and use Matlab to fit the right and left line speed difference with the radius and slope polynomial relationship. The results show that the speed change of the left and right rows shows a deceleration-acceleration trend during the curve-bending and bending process. When the curve radius is greater than 30m, the right-hand speed is always greater than the left-hand speed. When the curve is less than 30m, the left-right line speed curve crosses. The right speed is first bigger and then smaller, and the curve can be approximated as the axis of symmetry in the curve.The difference between the left and right speed and the radius and the slope satisfy a multi-relationship. The smaller the slope, the larger the radius, the greater the speed difference. And different speed limit values can be set for the left and right direction of the curve with larger difference. |
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