With the development of modern automobile industry and electronic technology, functional electronic systems such as vehicle navigation, communication, mobile office, multimedia entertainment, security assisted driving and remote fault diagnosis can form an in-vehicle information network system through network technology networking. The future automotive instrumentation system is developing in the direction of an integrated, intelligent and fully graphical vehicle information system platform.
Overview of Vehicle Information System PlatformThe future in-vehicle information system platform will completely surpass the existing functions of traditional automotive instrumentation. The main functions of the system include: full graphic digital instrument, GPS navigation, car multimedia entertainment, vehicle status display, remote fault diagnosis, wireless communication, network office , information processing, intelligent traffic assisted driving and more. The future in-vehicle information platform is a high-end integrated information display platform integrating human, vehicle and environment, integrating technology of electronics, communication, network and embedded. The main functions of the in-vehicle information system platform should at least include the following aspects:
It mainly contains all the functions of traditional instruments. With a liquid crystal display (LCD) as a display terminal, a large amount of complicated information required can be displayed on the LCD screen in a graphical manner, flexibly and accurately. The basic requirements are high-brightness graphics, high real-time response, and the ability to receive signals from the CAN bus and sensors.
Through the collected information, the vehicle information is diagnosed and analyzed, the performance and condition of the vehicle are monitored more intelligently, and the user is prompted. At the same time, the diagnostic analysis data and the diagnostic service center are transmitted in real time through the GPRS module of the vehicle information platform. Through the external GPS module and communication module, and through the monitoring center, vehicle anti-theft monitoring and remote control.
wireless onlineBy covering the national GSM/CDMA/GPRS signal, wireless Internet access anytime, anywhere, the maximum rate can reach 153.6Kbps, which can realize E-Mail, FTP, online chat, browsing information, online games, picture download, mobile office, e-commerce and other networks. Features. Fast speed, stable performance, safe and reliable.
Navigation informationAchieve complete navigation. With GPS global positioning system, users can locate and continuously locate in any corner of the world. In addition to providing functions such as autonomous navigation, information inquiry, optimal driving path calculation, track recording and playback, it also provides traffic congestion prediction. Advanced features such as parking lot parking guides, real-time updates of map data that can be connected to the network. The display of the navigation information system is limited to a local area and should not affect the simultaneous display of the instrument system.
Car phoneWith CDMA wireless communication or VOIP network phone, the car hands-free and wireless headset seamlessly switch to ensure the driving safety of the owner during the call.
The in-vehicle entertainment system has evolved from a previous radio and a cassette player or CD player to a system that can communicate with other vehicles through a variety of entertainment and information. More demanding than many other audio/video applications, such as home appliances, A/V systems. To meet people's requirements for car entertainment and comfort, satellite digital broadcast reception, car digital TV reception, CD/DVD playback, etc., and multimedia playback functions such as MP3/MP4/IPOD/USB. Audio and video files can be downloaded wirelessly, completely eliminating the hassle of using discs. The front center console or headrest-style true color display and high-fidelity car audio provide users with professional-grade audio-visual enjoyment.
Auxiliary safe driving Mainly include: driver fatigue monitoring, front and rear ranging radar systems, collision analysis, brake control, safety alarm system and auxiliary rear view system. The driver's monitor is placed under the steering wheel to capture the driver's face and automatically analyze the eyelid opening. After analysis, if there is fatigue driving, it will automatically alarm; at the same time, the front range radar and the rear range The radar system automatically measures the front and rear distances and sends this information to the collision analysis unit. If there is a danger of collision, an alarm will be issued, and the drive motor of the seat belt will be automatically braked or controlled, so that the occupant is in an optimally designed position before the collision occurs, so that the consequences of the accident are minimized.
Its auxiliary rear view function is mainly through the reverse shift, you can see the full color image behind the car from the high-definition LCD display, and the auxiliary rear view and rear view camera have the functions of anti-glare and night vision, which is convenient for the owner to ensure the night. The safety of reversing.
Obtaining real-time and reliable traffic information has always been a bottleneck problem in the development of intelligent transportation systems. Establishing an intelligent traffic vehicle information collection system can provide good auxiliary tests for the study of driving behavior characteristics, traffic data collection, and field testing in intelligent transportation systems. The verification platform can also be used as an auxiliary detection means to provide strong technical support for the construction and development of multi-functional experimental vehicles of intelligent transportation systems in China, thus accelerating the research and development of related technologies of intelligent transportation systems in China.
Technical development in the field of in-vehicle information platformsThe vehicle information platform includes many aspects of technology. The following briefly introduces several key technologies involved as follows:
TelemaTIcs is a composite word composed of communication and information science, commonly referred to as in-vehicle telematics. It combines automotive manufacturing and IT technologies, including computers, mobile communications, digital broadcasting, etc.; at the same time, it relies on the "3S" of ITS to rapidly develop into a new business that integrates technologies and services. TelemaTIcs connects the vehicle terminal and the service center through a wireless channel to form a communication link for providing information services. Through the terminal system installed in the car, analyze various conditions occurring inside and outside the car, collect various information necessary for driving and driving, and perform a series of necessary controls to provide convenience and safety for the driver and passengers. entertainment.
The technical characteristics of TelamaTIcs fully demonstrate the integration of modern technology. It uses five main technologies: satellite positioning technology (GPS); wireless access technology; cellular communication technology (2G/3G); narrowband network technology (DSRC) for dedicated short-range communication; digital broadcasting and multimedia broadcasting technology (DMB), fusion Become the main function of 4 categories:
(1) Ground navigation based on satellite positioning technology (GPSGIS). Guide the vehicle to the destination with the best route according to the state of the road.
(2) Intelligent transportation based on ITS digital broadcasting (GPSGISLBSCDMB). A typical application is the pilot of real-time conditions on the road. It is different from geographic information-based navigation. On the basis of navigation, it uses the real-time location information (LocationBasedServices, LBS) generated on the road to guide the vehicle not only to select the best geographical route, but also to select the shortest optimization time. routing. Through the real-time multimedia information of the road surface conditions published by the ITS Information Center, the results of voice, analysis and measurement processing are transmitted in the form of broadcast, and the geographical data of remote sensing measurement is synthesized into the pilot map guiding the real-time driving in the form of data, promptly reminding the driver to avoid the traffic. Blocks or unexpected sections give the best modified driving route to reach the destination in the shortest possible time.
(3) Remote information service based on wireless mobile communication technology (2G/3GDSRCWLAN). On the one hand, it builds a piconet in the car in the form of WLAN, and realizes networked communication and information service with a common information platform, which is basically consistent with the functions of mobile communication and wireless Internet access; on the other hand, RFID tags and readers, and then RFID In the DSRC Internet Service Center, the information of the engine temperature, exhaust gas, tires, gasoline and driving conditions collected by the ECU is sent to the service station of the service center in the information platform mode to realize remote vehicle fault diagnosis and help; The billing information and the service cost information are sent to the settlement center of the service center. The service center can analyze and judge whether the vehicle has any faults, whether there is any possible out-of-control, stolen or other emergency situations, and can inform the driver in time. Can command the car to slow down, stop running or fail to start. At the same time, accurate accounting and automatic charging.
(4) On-board cultural entertainment based on digital broadcasting technology (CDMB-T/CMMBITS). It not only displays TV programs, road conditions, MTV, video games, etc. in the car, but also displays and manages personal program information resources (data broadcasting), and downloads geography, landforms, maps, etc., and displays them at any time via broadcast broadband. Internet information such as E-Mail.
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