Introduction to car navigation system[汽车知识]

GPS is a radio navigation and positioning system based on 24 positioning satellites around the world, providing three-dimensional position, three-dimensional speed and other information to all parts of the world around the world. The positioning principle of GPS is: the user receives the signal transmitted by the satellite, obtains the distance between the satellite and the user, clock correction, atmospheric correction and other parameters from it, and determines the user's location through data processing. At present, the positioning accuracy of civilian GPS can reach within 10m. When the United States announced the opening of some GPS systems after the Gulf War,carThe industry immediately seized this opportunity and invested funds to develop a car navigation system to locate and display the car, and put it into use quickly. The car GPS navigation system is composed of two parts: one part is composed of GPS receivers and display devices installed on the car; the other part is composed of a computer control center, and the two parts are connected through positioning satellites. The computer control center is authorized and established by the motor vehicle management department. It is responsible for observing the dynamics and traffic conditions of the designated monitored cars in the jurisdiction at any time. Therefore, the entire car navigation system has at least two major functions: one is the car track monitoring function. The coded GPS receiving device is installed on the car. The car can indicate its location through the electronic map of the computer control center no matter where it is driving. The other is the driving guide function, and the car owner can electronic The map is stored on the floppy disk. As long as the floppy disk is inserted into the receiving device on the car, the location of the car’s area and the current traffic status will be displayed on the display screen. You can enter the destination you want to go to and pre-program the best The driving route can also accept instructions from the computer control center to select the route and direction of the car.Source: China Auto Repair Network

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