1 car networking concept
The concept of car networking originates from the Internet of Things. It refers to real-life pedestrians, cars, roads and cities as carriers, in accordance with certain communication protocols and data transmission standards, to realize the internal and external data transmission and information exchange of cars, and then realize Traffic management intelligent, dynamic, and information-based integrated network. At the same time, according to the difference in functional requirements, the running state of the vehicle can be supervised, and services can be provided. Even the different electric energy can be connected like the Internet to realize the "communication" between pedestrians and automobiles, automobiles and non-motor vehicles.
2 car networking advantages
Through the Internet of Vehicles, you can provide a safer way to drive. The vehicle network can analyze and calculate other vehicles on the road in advance according to the information provided by the network, such as traffic, vehicles, road conditions, etc., select the best safest and stable driving route and driving speed, reduce the possibility of accidents, and improve the safety factor. . At the same time, it also relies on the network to improve the capacity and efficiency of the road. In terms of economy, through the network control of the car, combined with the current road conditions, calculate the appropriate gear position and speed, to reduce energy consumption, save fuel, further reduce exhaust emissions, and help protect the environment.
3 car networking key technology
3.1 Sensor technology and information fusion
Nodes in the Internet of Vehicles use RFID, which is the key technology of sensors, to automatically identify vehicles, roads, buildings and other objects and obtain relevant data, and then integrate information through short-distance wireless data transmission and information fusion to extract traffic jams and traffic safety. Related content. Key Technologies of Sensors The main advantages of RFID in the Internet of Vehicles are the ability to identify multiple objects in high-speed operation with technology, and to facilitate the mutual transmission of information between vehicles in the vehicle network. Active RFID technology is recommended for communication in the Internet of Vehicles because it provides farther read and write distances and enables active sensing. Compared with other transmission technologies, active RFID has many obvious advantages, such as good security, waterproof and anti-magnetic, long service life, small size and light weight, and large data storage.
3.2 Open intelligent terminal system platform and speech recognition technology
In order to ensure the safety of the owner, it is decided that the vehicle terminal cannot use the traditional mouse, keyboard and other equipment for human-machine communication. Therefore, voice interaction is the best way. The mature voice technology enables the owner to tell the demand and the number of orders through the voice of the car, and at the same time use the ear to receive the service sent by the car network. The voice technology is very suitable for the fast moving object of the car. However, the mature speech recognition technology has high requirements on the corpus and computing power. In other words, the development of car speech technology is inseparable from the network. It can be said that the speech technology is formed on the basis of the network. The server-based "cloud recognition" technology is It forms the key. Collect and calculate a large amount of speech recognition data, and then use the network computing technology to build a unique car audio network voice platform engine based on the mobile Internet environment to realize the recognition of multiple languages and even dialects.
3.3 Middleware technology
In the Internet of Things, it is necessary to pay attention to the development of IoT RFID middleware. It is an important program to realize data transmission, filtering and data format conversion between RFID hardware devices and application systems. The data collected by RFID sensors is extracted through middleware. , decryption, filtering, conversion, input into the application program of the Internet of Vehicles, and through the application system to the application interface of the terminal system to achieve human-computer interaction. There are many applications in the Internet of Vehicles. The development of multiple applications has increased the speed and difficulty of the development of the Internet of Vehicles. The emergence of RFID middleware has provided a turning point for this situation, through the development of various middleware, such as traffic signal control middleware. Vehicle assisted driving middleware, emergency handling middleware, vehicle path navigation middleware, etc. Each middleware is developed according to the standards and requirements of the Internet of Vehicles application service, so the development of the entire vehicle networking application service will be more effective.
3.4 Cloud Computing
Applying cloud computing to the Internet of Vehicles products can not only greatly improve business processing efficiency, but also provide more accurate services for industry users. It can also utilize the extensive service support of the platform, the latest real-time data, and powerful computing capabilities. The service provides more powerful support. For example, traditional navigation is almost always based on local data, that is, based on a static road, but in fact the road is only in a static state in most cases, most of the time and situation are dynamic, based on cloud computing The "cloud navigation" can realize the navigation of dynamic roads, that is, "real-time intelligent navigation". According to user requirements, the cloud platform can adjust the route planning with reference to real-time road condition information and emergencies, providing users with a more rational route. Like the Internet and mobile Internet, the Internet of Vehicles also realizes service innovation and provides value-added services through service integration.
3.5 Vehicle safety warning technology
The safety index parameters during the running of the vehicle include the running speed of the vehicle, the temperature of various media in the driving system, whether the steering system of the vehicle and the driving system are working properly, etc., and the vehicle sensor can provide these index parameters at any time. The driving test information of the vehicle mainly includes non-motor vehicle and pedestrian information, traffic condition information, road traffic condition information, etc., and the information can be obtained through communication between the vehicle and the roadside facility, or can be obtained by video capture. The geographic information system can be arbitrarily enlarged to query the road alignment information. Since the technology in this field is currently in the stage of accelerated construction, the update speed of the geographic information system always lags behind the change speed of the road alignment. Therefore, the electronic map cannot provide all the information. Geographic information requires the use of on-board units and sensors to obtain linear information of roads, but this method cannot achieve better real-time performance. At present, a more effective solution is to transmit the data information collected by the preceding vehicle to the following vehicle through communication between the vehicle and the vehicle. Aiming at the characteristics of traffic in China, the phenomenon of pedestrian and vehicle hybridization is very common. Therefore, the collection and processing of pedestrian and non-motor vehicle information plays an important role in traffic safety and the realization of vehicle unmanned technology.
As a hot issue in the field of transportation, the Internet of Vehicles technology has a wide range of content and scope. The Internet of Vehicles technology is still in the exploration stage of intelligent transportation construction in China. The key technology of vehicle networking lies in the precise positioning of vehicles and the establishment of communication platforms. With the continuous construction and improvement of the Internet of Vehicles technology, the intelligence of vehicle and traffic management control will be further strengthened, and traffic problems will be well resolved.