Application of Doppler LIDAR sensors for assessing track gauge widening in curves and locations with high-lateral forces
| 项目名称： | Application of Doppler LIDAR sensors for assessing track gauge widening in curves and locations with high-lateral forces |
| 摘要： | The application of Doppler-based, Light Detection and Ranging (LIDAR) technology for determining track lateral irregularities, specifically track alignment and gage variation, are investigated. The proposed method uses track measurements by two low-elevation, slightly tilted LIDAR sensors nominally pointed at the rail gage face on each track. The LIDAR lenses are installed with a slight forward angle to measure track speed in both longitudinal and lateral directions. The lateral speed measurements are processed for assessing the track gage and alignment variations, using a method that is based on the frequency bandwidth dissimilarities between the vehicle speed and track geometry irregularity. Lateral track geometry is described by track alignment and gage. Track alignment is defined in term of variation in the lateral positions of the left and right rails from a mean trajectory over a specific length of the track. Alignment can be measured manually using chord based approaches, where the lateral offset of the rail from the center of a string stretched between two ends touching the rail side is obtained at multiple locations. In addition, gage is defined as the distance between the two rails measured 5/8 inches from the top of each rail. Gage can be measured manually using a gage measuring stick. Excessive track gage variations lead to large lateral wheel and axle forces, which could lead to a derailment, excessive body acceleration, and damage to the track structure. |
| 状态： | Active |
| 资金： | 75000 |
| 资助组织： | Office of the Assistant Secretary for Research and Technology |
| 项目负责人： | Ahmadian, Mehdi |
| 执行机构： | Virginia Polytechnic Institute and State University, Blacksburg |
| 开始时间： | 20190901 |
| 预计完成日期： | 20210831 |
| 主题领域： | Maintenance and Preservation；Railroads |
相关文献
- Load Transfer from Track to Bridge Structure on Curves
- Investigation of LiDAR sensing technology to Improve Freeway Traffic Monitoring
- Deflection Angle Effect on Continuous Driver Performance Along Horizontal Curves
- BASIC RESEARCH INTO THE BEHAVIOUR OF VEHICLES ON WET ROADS
- Exploring the use of LIDAR data from Autonomous Cars for Estimating Traffic Flow Parameters and Vehicle Trajectories
- Some Core Techniques for Safe Autonomous Driving
检索历史
应用推荐
