Key Laboratory of Operation Safety Technology on Transport Vehicles

Beijing, China

Key Laboratory of Operation Safety Technology on Transport Vehicles

Beijing, China
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Chi J.-N.,University of Science and Technology Beijing | Chi J.-N.,Key Laboratory of Operation Safety Technology on Transport Vehicles | Xing Y.-Y.,University of Science and Technology Beijing | Liu L.-N.,University of Science and Technology Beijing | And 2 more authors.
Applied Optics | Year: 2017

In this study, a novel method that calibrates 3D gaze tracking systems using multi-camera global calibration is proposed. In the proposed method, a calibration camera placed in front of the computer screen and the system camera constitute a multi-camera system. Video images are acquired by this multi-camera system to estimate the position of the light sources and the computer screen relative to the system camera. The method first evaluates the transition matrix between the system camera and calibration camera, and then computes the relative position of camera and targets such as light sources and monitor. Finally, it determines the target position in the system camera's coordinate system. Experiments conducted on a system containing one camera and two light sources verify that the proposed calibration method is accurate. The method overcomes the problem of the screen and light sources not being in view of the system camera. Further, it is relatively simple to apply, is very accurate, and provides a new basis for many other similar calibration systems. © 2017 Optical Society of America.


Chen J.,University of South China | Chen J.,Key Laboratory of Operation Safety Technology on Transport Vehicles | Yi L.,University of South China | Yi L.,Key Laboratory of Operation Safety Technology on Transport Vehicles
Procedia Engineering | Year: 2013

Based on the principle of oxygen consumption, relationship between heat release rate of coach fire and ventilation factor is studied. The peak heat release rate of coach fire is estimated under four typical ventilation conditions: one window, two windows, four windows and all windows of the fire coach are opened, respectively. Results were compared with the predictions by traditional empirical formulas for flashover in confined space. A suitable calculation method for forecasting the heat release rate of coach fire is presented. CFD means were also applied to simulate and analyze the impact of the ventilation factor on the burning characteristics of coach fire. The results indicate that the calculation method can predict the heat release rate of coach fire well. The peak heat release rate of coach fire is proportional to the ventilation factor. The calculation results are 6.3MW, 8.4MW, 12.6MW and 39.7MW and simulation results are 6.5MW, 9.9MW, 14.8MW and 39 MW respectively under different ventilation conditions in this study. The results also show that the heat release rate and of coach fire increases with the increase of ventilation factor. © 2013 The Authors. Published by Elsevier Ltd.


Zhang H.,Chinese Research Institute of Highway | Zhang H.,Key Laboratory of Operation Safety Technology on Transport Vehicles | Zhang H.-W.,Chinese Research Institute of Highway | Zhang H.-W.,Key Laboratory of Operation Safety Technology on Transport Vehicles | Yang J.-Q.,Beihang University
Procedia Engineering | Year: 2016

Three different type of double road trains are selected as simulation model, which is commonly used in developed countries and regions in order to improve the efficiency of road transport and the development of China's logistics industry. The passing ability simulation model of double road train is established based on Auto Turn, and China's current longest tractor-semitrailer is used as a comparison. Simulation models of highway ramp, first class highway and second class highway are established according to the requirement of JTG D20-2006 'Design Specification for Highway Alignment'. Adaptability of double road train and highway structure parameter is researched by analyzing different types of double road train turn left, turn right and turn around on the road. The type of double road train which can meet China's standards is recommended. The result can promote the application of double road train and give some advice for improving passing ability. © 2016 The Authors. Published by Elsevier Ltd.


Yi L.,University of South China | Yi L.,Key Laboratory of Operation Safety Technology on Transport Vehicles | Chen J.,University of South China
Advanced Materials Research | Year: 2012

The aim of this work is to study the burning characteristics of coach fire. With application of computational fluid dynamics (FDS software package), coach fires caused by arson are simulated under different ventilation conditions. Variation of heat release rate (HRR) and distribution of temperature are analyzed. Peak heat release rate of coach fire caused by arson in passenger carriage can reach about 24 MW and maximum temperature in the carriage is over 1000 °C. Results of this study can be referred for fire protection and rescue design of coach. © (2012) Trans Tech Publications, Switzerland.


Quanqi W.,Key Laboratory of Operation Safety Technology on Transport Vehicles | Jian W.,Beihang University | Yanyan W.,Beihang University
2011 International Conference on Consumer Electronics, Communications and Networks, CECNet 2011 - Proceedings | Year: 2011

This paper introduces the overall design of vehicle bus data acquisition and fault diagnosis system on the basis of OBD, focusing on its lower computer system and the upper computer system design principles. This system is based on the widely used CAN bus technology, to extract the vehicle's status or fault information. The CAN bus adopts the SAE J1939 protocol standards, maximize the superiority of it. The system acquires and analyses the data from the CAN bus under the SAEJ1939 protocol, which provides about 400 faults. The system displays the faults on the LCD screen in the way of the fault tree, so the users can check them easily. It can send data to the upper computer system or management center by General Packet Radio Service (GPRS), to view the vehicle status or fault information far away, and to achieve the remote monitoring of the vehicle and fault diagnosis. © 2011 IEEE.


Zong C.,Chinese Research Institute of Highway | Zhang H.,Key Laboratory of Operation Safety Technology on Transport Vehicles | Yi Z.,Key Laboratory of Operation Safety Technology on Transport Vehicles | Yi Z.,Beihang University
ICTIS 2013: Improving Multimodal Transportation Systems - Information, Safety, and Integration - Proceedings of the 2nd International Conference on Transportation Information and Safety | Year: 2013

With the popularization of drop and pull transport's organization mode, more and more combination vehicles will be on highways in China. There are many accidents caused by trucks. Drop and pull transport demands higher speed and better reliability for vehicles than before. This paper analyzed the key factors influencing transportation process and put forward to use Analytical Hierarchy Process (AHP) to evaluate the safety of cargo's transportation on road. The experts rate the relative importance between factors in basic index layer and criterion layer, and then the weight of all factors in criterion layer to target layer can be calculated. The results showed that supervisors can evaluate the safety of loaded trailers according to the detailed information of transportation. Finally, this paper brought forward checking rules for different stages of cargo loading and transportation. © 2013 American Society of Civil Engineers.


Hao L.,Beijing Institute of Technology | Hao L.,Key Laboratory of Operation Safety Technology on Transport Vehicles | Xu X.,Beijing Institute of Technology | Guo X.,Beijing Institute of Technology | And 4 more authors.
International Journal of Hydrogen Energy | Year: 2016

For spark-ignited gasoline engine, cold start emission of hydrocarbon (HC) and carbon monoxide (CO) is a long-term concern due to a large portion of HC and CO emitted during cold start period. Starting by hydrogen or adding a fraction of hydrogen can greatly reduce the engine cold start emissions of HC and CO due to the carbonless and excellent combustion characteristics of hydrogen. However, the higher combustion speed and temperature of hydrogen tend to cause more NOx emissions. Therefore the amount of hydrogen addition to conventional fuel should be optimized at different engine operating conditions. In this paper, a spark ignited gasoline engine was retrofitted to a hydrogen gasoline flexible fuel engine by adding a set of hydrogen injection system, and the engine can be fueled with gasoline, hydrogen or both. An electronic control system was developed and applied to control the injection timings and durations of hydrogen and gasoline. In order to reduce cold start emissions of HC and CO, the engine started with hydrogen and then changed to run on gasoline with hydrogen addition or on pure gasoline to avoid high NOx generation. The basic composition of the control system was introduced and the cold-start emission control strategy for the hydrogen gasoline flexible fuel engine was investigated. And finally the emission of the vehicle running on the hybrid hydrogen and gasoline fuel mode was tested over the New European Driving Cycle (NEDC), and compared with that of the original gasoline car. The experimental results showed that the cold start emissions of HC and CO greatly decreased when the vehicle engine operating on hybrid hydrogen gasoline mode. © 2016 Hydrogen Energy Publications LLC


Liu Y.,Key Laboratory of Operation Safety Technology on Transport Vehicles | Yao Y.,Key Laboratory of Operation Safety Technology on Transport Vehicles | Zhang X.,Key Laboratory of Operation Safety Technology on Transport Vehicles | Liu B.,Key Laboratory of Operation Safety Technology on Transport Vehicles | Ding C.,Beijing Jiaotong University
Proceedings of 2015 International Conference on Estimation, Detection and Information Fusion, ICEDIF 2015 | Year: 2015

According to some reasons, such as multifarious, low efficiency status of scientific research management work by artificial way, furthermore, big workload and poor adaptability of requirement change exists in traditional software development method. In this paper, a typical model of scientific research project management process was build based on workflow technology. The business logic and specific function of project management were designed separately, so a unified and orderly management of scientific research project was realized, and flexibility and system adaptability were enhanced too. Rapid development platform technology was chosen in the business system development. This technology affords a develop mode of parameter customization and it could manage intelligence report, data maintenance, Model View Controller (MVC) service control and other parameters. Compared to the traditional programming development mode, a complex and high quality business system can be developed conveniently and fast. © 2015 IEEE.


Dong J.,Chinese Research Institute of Highway | Zong C.,Key Laboratory of Operation Safety Technology on Transport Vehicles | Zhang H.,Key Laboratory of Operation Safety Technology on Transport Vehicles | Zhang X.,Key Laboratory of Operation Safety Technology on Transport Vehicles | And 2 more authors.
ICTIS 2015 - 3rd International Conference on Transportation Information and Safety, Proceedings | Year: 2015

Articulated vehicle trains consists of a semitrailer tractor and a semitrailer. The power performance and the fuel economy are key indicators in practical cargo transportation, resulting from the matching performance in the transmission system, being relative and restricted to each other. The indicators on evaluation and test methods are put forward depending on the analyses on factors of power performance and fuel economy. The weights of factors are defined by analytic hierarchy process, and the model on power performance and fuel economy of articulated vehicle trains are established and verified by practicing on real road tests. The evaluation model is serving as an indicator on matching power performance and fuel economy of articulated vehicle trains and an important indicator in assembling articulated vehicle trains for road cargo transport enterprises. © 2015 IEEE.


Liu Y.P.,Chinese Research Institute of Highway | Liu Y.P.,Key Laboratory of Operation Safety Technology on Transport Vehicles | Zhu C.,Chinese Research Institute of Highway | Zhu C.,Key Laboratory of Operation Safety Technology on Transport Vehicles
Applied Mechanics and Materials | Year: 2014

Belt and airbag are the most important protection devices in vehicle frontal crash, which can have the best protective performance when only they were well matched with vehicle body structure. In this paper the theoretical guidance for optimizing belt and airbag parameters is researched, in order to improve the effect and efficiency of parameters optimization of restraint system. Firstly, a simulation model for occupant restraint system is developed based on the finite element theory combined with multi rigid body theory, and its effectiveness for simulating the occupant dynamic response in frontal impact is validated. Then, the energy dissipation characteristics of occupant head and chest in typical frontal crash are analyzed based on the developed model. Lastly, the adaptive level of restraint system parameters are evaluated according to the dissipation characteristics of occupant energy, and theoretical guidance for parameters optimization are summarized based on the evaluation. The analysis results indicate that: (1) airbag with low stiffness cannot fully utilize the deformation of vehicle body to dissipate the energy of occupant head, but may increase the risk of head injury; (2) belt with high stiffness would apply a big force to occupant, which could increase the compression amount of chest and may increase the risk of chest injury. © (2014) Trans Tech Publications, Switzerland.

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