The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Due to the poor environment in the West of China, this research firstly analyzes the application requirements of low density, low cost and high reliability, and then focuses on the integrated BeiDou Navigation Satellite System (BDS) and Inertial Navigation System (INS) to achieve seamless positioning. The map-matching technology in the switch section is studied and its process is discussed and tested,...
In traffic video surveillance system, target-level tracking and feature-level tracking are two important areas for research. Therefore, the combination between them is an interesting question. Mean-shift is a traditional target-level tracking algorithm with no adaptation to vehicle scale and orientation change. In order to solve the problem, algorithm combine SURF (speed-up robust feature) feature...
Safety assurance of vehicles is of great importance to improve the road transportation, especially at the unsignalized intersections. To eliminate safety threat that is mostly caused by vehicle-to-vehicle collisions, technologies and methodologies of cooperative vehicle infrastructure system provide sufficient capabilities for a vehicle to share relevant information with other connected neighborhood...
Vehicle autonomous navigation is crucial for the implementation of vehicle infrastructure integration, which is a prospective trend of intelligent transportation systems. The integration of multiple on-board sensors and even the support from V2V and V2I communication are critical to maximize each of their benefits. This paper discusses the concept of multi-sensor based vehicle autonomous navigation...
Based on basic theory and methods of fault injection, the software-based fault injection was constructed for distributed and inter-operated simulation architecture based on High Level Architecture (HLA). The fault test program of communication in train control simulation system was designed. The fault injection tools were used to control train control model. Every module in train control model should...
Train locating information is very important for train control system, how to achieve automatic identification of train track occupancy using GNSS simply in some railway sections without track circuits has been a crucial problem. Hausdorff distance can be used to measure the mismatch between two sets, which is widely used in object matching. This paper presents a novel algorithm for automatic identification...
With the rapid development of the intelligence and complication to railway systems, there are increasing demands of electromagnetic compatibility performance for train borne system, where the electromagnetic compatibility performance of train positioning system (TPS) is crucial to the design process of the entire system. In this paper, the system architecture of TPS integrating multi sensors is introduced,...
High-speed train control system is one complex security system with lots of functions, which means that it is necessary to build up high-speed train control system simulation & testing integration platform to start function and system verification and validation (V&V). In this paper, key techniques of high-speed train control system simulation & testing integration platform are studied;...
With high accuracy and storage efficiency, digital track map plays an important role in train positioning system as a special sensor, and directly affects the safety of the train operation control. In this paper, the characteristics of the track are analyzed with practical measurements, a distance discrimination is utilized to reject abnormal data, and a vertical distance criterion and cubic spline...
Basic principle, composition and classification of European Train Control System (ETCS) are introduced. Train Traction model and Brake model of ETCS controlling Curves are studied, which includes increasing and decreasing curve model. At last, the application and development of ETCS in high-speed railway are introduced, which could be as reference of Chinese train control system controlling curves...
As we all know, freeway solves the problem about the lack of the transportation resources in home and then contributes to the development in economy. However, as economy developed fast, the growing number of motor, together with people's favor to choose freeway, makes freeway full of motor, chaos and congestion. On-ramp control is one of the efficient ways to regulate the flow of traffic entering...
Train positioning with high precision and integrity is crucial to train control system. For conventional positioning methods in multi-sensor integration frame could not meet the performance requirements, a GNSS/INS integrated positioning system architecture is built, in which the cubature Kalman filter is analyzed and employed to solve the problem of nonlinearity and computation efficiency, and the...
High-speed railway train control system is one complex security system with lots of functions, which means that deep research on safety and reliability of high-speed railway train control system be carried out. According to characters of simulation of high-speed railway train control system and advantages of fault injection, method of control system reliability and safety based on fault injection...
The low-cost train control system is new trend for modern train operation and management. Based on the functional requirement of track map database, generation of track map in GIS and schematic form are mainly studied in this paper, as well as their mapping description. In the low-cost scheme, the flow of the generation is discussed in detailed and several strategies are employed to realize the mapping...
As we known, how to describe rail track with precise data is one important problem in train positioning research fields, research of variational curve model base on Level Set and GVF (Gradient Vector Flow) was studied systematically and the GPS data reduction model, method and algorithm base on variational curve model in limited restriction condition was studied, combine with real track data, analyzed...
Under the development of high technology, GPS software receiver has been more and more highly developed, thus becoming the hot issue in the GPS receiver research field. This paper demonstrates GPS software receiver using IF signal from the NewStar210A IF signal sampler as the raw data, then using Matlab as the software for signal acquisition and tracking. The navigation data, pseudo range, carrier...
Vehicles detection base on the magnetic effect is a major hot spot in the field of vehicles detection. This paper has studied and realized a wireless magneto-resistive sensor based vehicles detection system, and improved the vehicle detection algorithm. The thesis has used a testing algorithm based on iterative optimal wavelet threshold used to focus on testing whether vehicles passing by. For the...
Because of complexity of CTCS-3 train control system, interworking testing and function evaluation could not be operated directly on the system, which means that deep research on modeling and simulation of train operation control system should be carried out. This paper proposes a modeling and verification method based on UML and colored Petri net. On the basis of analysis of advantages and disadvantages...
In order to improve the performance of integrated navigation system, the property of odometer navigation and the problem of calibration for odometer scale factor is researched, and a novel odometer calibration method based on the grey theory is proposed in this paper. In this method, the grey model is built and updated with a few real-time or historical sensor data, and in most time in navigating,...
Research of variational curve model in limited restriction condition and application in rail train control track database was studied in this paper, raised the method, model and algorithm for digital track map auto-generation from GPS track data, through lots of testify, comparison and improvement using practical data between those algorithm and method, aim at track data, construct mathematical model...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.