Article
Chemistry, Analytical
Xin Wen, Jiazun Hu, Haiyu Chen, Shichun Huang, Haonan Hu, Hui Zhang
Summary: This paper proposes an adaptive calibration method to address accuracy issues in LiDAR sensors and enable multi-sensor fusion. By comparing two coordinate systems and calculating Euler angles, the method uses rotation matrices to calibrate the point cloud. Experimental results demonstrate that the proposed method achieves high precision.
Article
Engineering, Electrical & Electronic
Xiuguang Song, Rendong Pi, Chen Lv, Jianqing Wu, Han Zhang, Hao Zheng, Jianhong Jiang, Haidong He
Summary: This paper presents an augmented vehicle tracking method utilizing roadside LiDAR data to address occlusion-induced issues in linking vehicle trajectories. Through a two-part approach, over 89% of disconnected trajectories were successfully fixed, demonstrating superior performance compared to the state-of-the-art methods.
IEEE SENSORS JOURNAL
(2021)
Article
Instruments & Instrumentation
Yacong Gao, Chenjing Zhou, Jian Rong, Yi Wang
Summary: This study proposes a novel method for accurate vehicle trajectory extraction from roadside LIDAR. The method utilizes statistical filtering, density clustering, and a beetle swarm optimization algorithm to eliminate background noise, detect vehicles, and obtain vehicle position and size. Experimental results show that the proposed method achieves higher accuracy in vehicle recognition and trajectory tracking compared to traditional methods.
INFRARED PHYSICS & TECHNOLOGY
(2023)
Article
Transportation Science & Technology
Yuyi Chang, Wen Xiao, Benjamin Coifman
Summary: This paper presents a non-model based vehicle tracking methodology using a 3D LiDAR sensor to extract road user trajectories. The method postpones target segmentation until after collecting LiDAR returns, reducing errors. The study develops the methodology with a single LiDAR sensor, but suggests that multiple sensors with overlapping fields of view can extend the surveillance region indefinitely.
TRANSPORTATION RESEARCH PART C-EMERGING TECHNOLOGIES
(2023)
Article
Engineering, Multidisciplinary
Ciyun Lin, Yue Wang, Bowen Gong, Hongchao Liu
Summary: In this paper, a novel vehicle detection and tracking method for low-channel roadside LiDAR in complex environments is proposed. The method utilizes the L-shape fitting method to obtain accurate bounding boxes, and uses the decision tree with bagging algorithm to classify traffic objects. An improved Hungarian algorithm with the Kalman filter is applied to predict vehicle paths considering occlusion conditions. Experimental results show that the proposed method achieves detection and tracking accuracies of up to 99.50% and 97%, respectively, outperforming state-of-the-art algorithms.
Article
Engineering, Electrical & Electronic
Barak Or, Ben-Zion Bobrovsky, Itzik Klein
Summary: In Kalman filtering, there is a tradeoff between estimation accuracy and computational load when selecting the filter step size. A criterion based on error covariance matrices is proposed to guide a reasonable choice of step size, and an adaptive algorithm is elaborated for the case of time-varying measurement noise covariance. Simulation examples and a field experiment demonstrate the benefits of the proposed approach.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Mathematics
Chao Ou, Chengjun Shan, Zhongtao Cheng, Yaosong Long
Summary: To handle uncertainties and disturbances in the tracking system of an aerospace vehicle, a novel adaptive trajectory-tracking method based on a tracking model predictive static programming (T-MPSP) is proposed. The method incorporates an extended Kalman filter parameter correction strategy and considers control constraints to form a new T-MPSP algorithm. The effectiveness of the proposed method is demonstrated through simulations.
Article
Engineering, Marine
Yunsheng Fan, Shuanghu Qiao, Guofeng Wang, Si Chen, Haoyan Zhang
Summary: This paper proposes an improved filtering algorithm to address the issue of poor observation caused by strong vibration in unmanned surface vehicles during navigation, and achieves superior performance in target tracking.
Article
Multidisciplinary Sciences
Liu Wang, Fang Xie, Yong Zhang, Min Xiao, Fang Liu
Summary: This paper proposes a method combining a time delay loop with an extended Kalman filter to improve the measurement accuracy of optical phase tracking.
SCIENTIFIC REPORTS
(2022)
Article
Remote Sensing
Xu Lin, Xinghai Yang, Chihao Hu, Wei Li
Summary: Kalman smoothing algorithms are widely used in target tracking systems for offline data processing. The adaptive Kalman filter algorithm can reduce the impact of abnormal dynamic models on filter results to some extent. However, the complexity of selecting optimal adaptive factors makes it difficult to improve smoothing accuracy.
Article
Engineering, Electrical & Electronic
Bowen Gong, Binwen Zhao, Yue Wang, Ciyun Lin, Hongchao Liu
Summary: Lane marking is crucial for extracting lane-level and high-resolution microlevel traffic data in the vehicle-to-infrastructure (V2I) cooperative. However, detecting lane markings in complex environments poses challenges due to inconsistent lane width and indistinctive laser intensity. To address these issues, an accurate and robust lane marking detection method is proposed, which utilizes low-channel roadside LiDAR to divide the scanned area into grids, estimate the tilt angle of the lane markings, and extract the lane number and lane marking. Experimental results show satisfactory performance in terms of average distance error (ADE) and detection time.
IEEE SENSORS JOURNAL
(2023)
Article
Physics, Multidisciplinary
Xianghao Hou, Jianbo Zhou, Yixin Yang, Long Yang, Gang Qiao
Summary: The study aimed to estimate the 2-D locations and velocities of an underwater target with uncertain underwater disturbances using an adaptive two-step bearing-only tracking filter. The proposed filter demonstrated reliability and accuracy in simulations of underwater uncooperative target tracking scenarios.
Article
Engineering, Electrical & Electronic
Vimal Kumar, Shankar C. Subramanian, Rajesh Rajamani
Summary: This paper presents a novel algorithm for tracking closely-spaced road vehicles using low-density flash lidar. The algorithm addresses the challenge of unresolved measurements from multiple targets, by predicting target states and truncating probability density functions based on unresolved measurements. It demonstrates the capability to track multiple closely spaced targets effectively.
Article
Engineering, Electrical & Electronic
Seong-Hwan Hyun, Jiho Song, Keunwoo Kim, Jong-Ho Lee, Seong-Cheol Kim
Summary: “Vehicle-to-everything communication system” can improve driving experience and automotive safety by connecting vehicles to wireless networks. This paper presents an extended Kalman filter (EKF)-based vehicle tracking algorithm for reliable wireless connections. By designing a beamforming codebook considering road conditions and RSU, a service quality similar to conventional cellular services can be achieved.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Yanxin Nie, Minglu Zhang, Xiaojun Zhang
Summary: A coordinated control strategy for intelligent electric vehicle trajectory tracking and stability is proposed based on hierarchical control theory. The strategy includes an Adaptive Spiral Sliding Mode controller to reduce deviation in trajectory tracking and a tire force optimal distribution method for directional control. Simulation experiments validate the effectiveness of the control strategy in controlling vehicle trajectory deviation while ensuring lateral stability.
APPLIED SCIENCES-BASEL
(2021)
Article
Transportation
Junxuan Zhao, Hao Xu, Yuan Tian, Hongchao Liu
Summary: LiDAR sensors are widely used in transportation for surveying and autonomous driving. They have great potential for infrastructure-based traffic detection due to their reduced price and increased demand. Compared to video sensors, LiDAR is less affected by illumination and has faster data processing speed, making it ideal for real-time traffic detection. This study presents findings on the installation strategies of roadside LiDAR sensors for the best performance in real-time and trajectory-level traffic detection, providing guidance for future deployment.
JOURNAL OF INTELLIGENT TRANSPORTATION SYSTEMS
(2022)
Article
Physics, Multidisciplinary
Zhizhen Liu, Hong Chen, Enze Liu, Wanyu Hu
Summary: This study proposed a resilience assessment framework for urban road networks, showing that intersection-based attacks have a significant impact on resilience, and resilience is positively correlated with the node degree of the attacked intersection. Increasing alpha and beta can enhance resilience, and the urban road network achieves the best resilience performance when alpha = 0.3, beta = 0.5.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2022)
Article
Green & Sustainable Science & Technology
Zhizhen Liu, Hong Chen, Enze Liu, Qi Zhang
Summary: This study aims to establish a dynamic resilience evaluation method and explore the resilience evolution process for multi-mode public transit. The research found that the network's resilience performance was the worst when the subway station was destroyed. By adjusting the capacity control parameters, transport efficiency can be improved.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Electrical & Electronic
Ciyun Lin, Shaoqi Zhang, Bowen Gong, Hongchao Liu, Ganghao Sun
Summary: Food takeout services and the number of delivery motorcycles have been rapidly growing in large cities. Therefore, it is crucial to identify and track motorcycles using trajectory data in order to prevent and predict delivery riders' crashes. This study proposes kinematic features combined with shape and density information as input indicators for random forests to classify traffic objects. A multifeature fusion method is developed to track traffic objects by constructing a mathematics matrix, and an improved Hungarian algorithm is used for tracking the same object in the matrix. Experimental results show high recognition and tracking accuracy for delivery motorcycles, contributing to proactive strategies for reducing crashes related to takeout delivery motorcycles.
IEEE SENSORS JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Duo Wang, Hong Chen, Chenguang Li, Enze Liu
Summary: This study investigates the relationship between land-use characteristics and congestion pattern features in the Second Ring Road of Xi'an, China. Using cell-phone data, POI data, and land-use data, the study identifies congested road sections and traces them back to source parcels. The results show that residential land and population density have the strongest impact on congestion clusters, followed by lands used for science and education and the density of the working population. The study also highlights the role of specific parcels in network congestion.
Article
Engineering, Electrical & Electronic
Bowen Gong, Binwen Zhao, Yue Wang, Ciyun Lin, Hongchao Liu
Summary: Lane marking is crucial for extracting lane-level and high-resolution microlevel traffic data in the vehicle-to-infrastructure (V2I) cooperative. However, detecting lane markings in complex environments poses challenges due to inconsistent lane width and indistinctive laser intensity. To address these issues, an accurate and robust lane marking detection method is proposed, which utilizes low-channel roadside LiDAR to divide the scanned area into grids, estimate the tilt angle of the lane markings, and extract the lane number and lane marking. Experimental results show satisfactory performance in terms of average distance error (ADE) and detection time.
IEEE SENSORS JOURNAL
(2023)
Article
Transportation
Junxuan Zhao, Hao Xu, Zhihui Chen, Hongchao Liu
Summary: Accurate detection is crucial for enhancing the safety of vulnerable road users, and this study extends the application of infrastructure-based LiDAR to three major groups of users: pedestrians, cyclists, and wheelchair users. To address the challenges of detecting small-sized road users, a feature-based classification method combined with prior LiDAR trajectory information is proposed, resulting in significant improvement in road user classification performance. Experimental results show that classifiers with prior trajectory information achieve high recall rates, F1-scores, and AUC values for different traffic volumes and user categories.
JOURNAL OF INTELLIGENT TRANSPORTATION SYSTEMS
(2023)
Article
Engineering, Civil
Zhihui Chen, Hao Xu, Junxuan Zhao, Hongchao Liu
Summary: Cities worldwide are trying to find more efficient ways to solve the common parking problems in urban areas. This study proposes a solution for monitoring and collecting data on curbside parking using roadside LiDAR systems. By using laser beam variation detection, this solution can extract important information about parking usage.
TRANSPORTATION RESEARCH RECORD
(2023)
Article
Engineering, Civil
Nischal Bhattarai, Yibin Zhang, Hongchao Liu, Yaser Pakzad, Hao Xu
Summary: This paper presents a methodology for detecting rear-end conflicts at signalized intersections using LiDAR sensors. Vehicle trajectories were obtained from raw data collected by the sensors and processed using data processing algorithms. Surrogate safety indices were calculated from the trajectories to identify conflict threats and evaluate the risk exposure and severity during different temporal segments. The identified conflicts were compared with historical crash records, showing a correlation and providing new information about rear-end crash risks at intersections.
TRANSPORTATION RESEARCH RECORD
(2023)
Article
Engineering, Electrical & Electronic
Zhihui Chen, Hao Xu, Junxuan Zhao, Hongchao Liu
Summary: The roadside-LiDAR sensing system provides valuable traffic data for safety and operation applications by capturing the trajectories of road users. Background filtering plays a crucial role in processing LiDAR data, but existing methods have limitations in adapting to different traffic scenarios. This article presents a novel background filtering method that can automatically determine model parameters based on traffic-related measurements, resulting in higher accuracy and efficiency compared to existing methods.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Electrical & Electronic
Hui Liu, Ciyun Lin, Bowen Gong, Hongchao Liu
Summary: This article presents a lane-level and full-cycle multivehicle tracking (MVT) method using roadside LiDAR technology. A lane-level map is created by analyzing multiple frames of traffic object detection results, and an association method based on a search process and a microscopic motion model is introduced. A detection optimization approach using the lane-level map is proposed to enhance tracking performance. Experimental results demonstrate the algorithm's superior performance in anti-occlusion and accuracy.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Ergonomics
Nischal Bhattarai, Yibin Zhang, Hongchao Liu, Hao Xu
Summary: This study presents a methodology for identifying near-crashes using Roadside LiDAR based vehicle trajectory data, and calculating crash probabilities using extreme value theory. The results demonstrate that the bivariate model performs better in predicting crash frequencies, and different surrogate indicators reflect different threat levels.
ACCIDENT ANALYSIS AND PREVENTION
(2023)