What is GPS?
The Global Positioning System (GPS) is a new generation of space satellite navigation and positioning system jointly developed by the United States Army, Navy and Air Force in the 1970s. Its main purpose is to provide real-time, all-weather and global navigation services for land, sea, and air, and for military purposes such as intelligence collection, nuclear explosion monitoring, and emergency communications. It is an important component of the United States' global dominance strategy. After more than 20 years of research and experimentation, at a cost of 30 billion U.S. dollars, by March 1994, 24 GPS satellite constellations with a global coverage rate of 98% had been deployed.
What is GPS used for?
Your imagination will be the only limit to the applicable range of GPS. GPS systems involve a wide range of areas and are used in almost all walks of life. There are many places where GPS works are not realized by people, usually divided into the following five categories:
Positioning-determine the location
Navigation-from one place to another
Tracking-monitoring the movement of people or things
Drawing-making a map of the world
Time service-output precise time information
Current applications of GPS include mining, aviation, surveying, agriculture, navigation and military. Today, doctors, scientists, farmers, soldiers, pilots, surveyors, travelers, lifeguards, seamen, fishermen, loggers, firefighters, that is, people from all walks of life are beginning to use GPS, GPS makes their work easier , Safe and efficient.
What is a GPS vehicle terminal?
GPS vehicle terminal is installed incarA device with GPS receiving function in the room. GPS vehicle-mounted terminals are divided into two types, one is the one with autonomous navigation function, and the other is the tracking and positioning vehicle-mounted device with communication function. We only introduce the tracking and positioning terminal here.
The composition of GPS vehicle terminal
GPS host
Call handle (the handle looks similar to our mobile phone, but it is a bit bigger, and one end is connected to the car terminal, which can send and receive short messages and answer calls)
Multi-function line
GSM antenna
GPRS antenna
Alarm button line
Hands-free MIC cable
microphone
Oil circuit controlRelay
What is the function of GPS vehicle terminal?
For tracking and positioning terminals, the main function of course is tracking and positioning. To use this device, you must join the corresponding GPS operation center. Naturally someone will tell you when you buy the equipment). After you buy the equipment and connect it to the network, you have to pay a certain service fee to the operation center every month. The service fee varies from place to place, and it is about 50 yuan. Maybe you are still wondering, why do you have to pay? Because your device needs to work normally, the operator must pay China Mobile a data communication fee of about 20 yuan per month (calls are extra). Therefore, the GPS operator must ask you for the money. In addition, the GPS operator needs it every day Let me show you the car. OK, after you understand these questions, let's take a look at the functions of this device.
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