Design of GPS Vehicle Satellite Positioning Simulation System

　　At present, the vehicle mounted technology is very mature. It is widely used in the anti-theft tracking of private cars, the scheduling control of logistics vehicles, the electronic call security of taxis, the intelligent stop reporting electronic stop signs of buses, etc., and its price has become very cheap. It can be bought for several hundred yuan in the market [1]. Its core technology is GPS, and the electronic ground is the soul of GPS. Only through it can the vehicle positioning be realized. When the vehicle position is determined, the data can be sent to a third party through wireless transmission, so that the vehicle positioning can be realized. According to this technology, we have established a model that can simulate the vehicle operation. It can determine the vehicle position through the GPS positioning system, and through the wireless transmission system, Send the position information of the vehicle to the control center, and then send the control command to the vehicle when there is a control center, so that the vehicle can reach the designated position, that is, establish a model of "driverless" vehicle system through GPS/GSM. Of course, this model is built on the expressway. When the driver drives on the expressway, he can send the command to the workstation through the control button. The workstation will inform the driver after confirmation, After that, the vehicle enters the "driverless" state, and the driving of the vehicle is determined by the control center. When the vehicle arrives at the exit of the expressway, the control center will inform the driver that the driver will return the driving right to the user. In order to prevent accidents, the user can also interrupt the connection with the control center at any time.

　　This system simulates this model, using GSM as the media of data transmission, PC as the control center, and cars instead of vehicles to simulate the operation of vehicles in the campus. First, GPS sends the location information, and then GSM sends the information to the PC, which processes the information to display the location of the car on the map, and then PC sends the instructions, sends the instructions to the car through GSM, and the car executes the instructions.

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