GPS navigator is an instrument that can help users accurately locate the current position and calculate the journey according to the given destination. GPS navigator guides users to the destination through map display and voice prompt. It is mainly installed on the car and generally has the functions of map query, route planning, automatic navigation and automatic voice tour guide. The operation of GPS navigator relies on the Global Positioning System (GPS), which is composed of space satellites, ground monitoring and user reception. What we're using right now is a GPS navigator. Therefore, the GPS navigator in this paper is mainly car GPS navigator.
GPS vehicle monitoring system consists of three parts, namely, vehicle host, server and client. The vehicle host mainly determines the location of the moving target through the global Positioning satellite system (GPS) of the United States, and uploads the data through the mobile communication network and the global Internet. The server receives and stores the positioning data, and the client extracts the map and vehicle positioning information through the global Internet access server to provide users with perfect services.
The working principle of the system is that the GPS receiver installed on the vehicle calculates the current position of the vehicle according to the received satellite information. The communication controller extracts the required position, speed and time information from the signal output of the GPS receiver, combines the vehicle identity information to form data packets, and then sends them to the monitoring center through the GPRS network of the mobile operator. The server of the monitoring center receives the data sent by the vehicle machine and extracts the location information from it, which is displayed on the electronic map of the monitoring center according to the vehicle number and group number of each vehicle. At the same time, the system administrator of the control center can inquire the running status of each vehicle and reasonably dispatch vehicles according to the traffic flow.
From the point of view of the industry chain, GPS navigator upstream for hardware and software; The hardware includes chip, antenna, processor, memory, screen, keys, speakers and other components. Downstream is mainly the auto industry.
