Modern people are no longer familiar with GPS. Although the GPS system was originally established for military purposes, it has soon been greatly developed in civilian use. Many people may have only heard of GPS for in-car navigation, but they have not practiced it. The future of GPS automotive applications seems to be limitless, and the dreams brought by technological progress are also endless. GPS automotive systems provide a new, instantly knowable address for every piece of land on the earth’s surface – a new international standard for location and distance.
application
Before understanding the vehicle GPS, you should know the structure of the vehicle GPS navigation and the difference from the vehicle tracking system. The current vehicle GPS system end point is usually composed of GPS module, wireless communication module, alarm control module, voice control module, display module and vehicle PC and other parts:
1. GPS module: a small device installed on a vehicle that is part of a GPS vehicle unit and is used to receive information transmitted by satellites.
2. Wireless communication module: Usually, car radiotelephones, radio stations or mobile data end points (MDT) are used to complete information exchange functions.
3. Alarm control module: sends an alarm signal to the monitoring center network to report abnormal vehicle information.
4. Voice control module: Complete voice control and service functions.
5. Display module: used to display video image information such as location and road conditions, optional LCD, CRT or TV display.
6. On-board PC: Integrate and process various functional modules, cooperate with corresponding software, and complete designated functions, such as data processing, calculating the longitude, latitude, altitude, speed, and time of the location.
Due to the particularity of the use environment, the on-board PC as the core of the system must be small in size, high in integration, low in power consumption, strong in processing power, and simple and convenient in operation. At present, more on-board PCs use embedded operating systems, such as Windows CE and embedded LINUX. According to the requirements of frequent vehicle use and the complexity of the road, it must be highly reliable, scalable and compatible.
GPS vehicle application systems are generally divided into two categories: vehicle tracking systems and vehicle navigation systems. They are very different in function, one is used for vehicle anti-theft, and the other is used for vehicle autonomous navigation. Since "only accept, do not transmit" signals is a major feature of GPS receiving systems, GPS tracking systems for anti-theft are to use communication networks and government supporting systems to provide GPS vehicle anti-theft devices with a solution that charges for use. The vehicle navigation device accepts satellite signals and cooperates with electronic map data to grasp its own position and destination in a timely manner. The mode of autonomous navigation does not charge any usage fees, and users can selectively purchase map data according to their own needs.
GPS technology uses GPS satellite signals to receive, and can receive data parameters sent by satellites 24 hours a day without interruption to settle the received three-dimensional position, three-dimensional direction, motion speed and time information. The car navigator uses satellite signals and electronic map data to grasp its own position and destination in a timely manner. The autonomous navigation mode does not charge any usage fees, and users can choose to buy map data according to their own needs. When the user installs the car GPS, no matter which city, town or suburb the user is in, we can find a restaurant or the nearest gas station in an instant.
As far as our country is concerned, a group of GPS professional players has quietly emerged. Most of them are outdoor sports and car off-road enthusiasts. These users can also learn the direction of the vehicle through the on-board GPS, which can replace the traditional altimeter and display information such as altitude. Through the acceptance calculation of satellite signals by GPS, the specific speed of driving can be measured. For those who love outdoor sports, car off-road enthusiasts, GPS makes them no longer troubled by losing their way, because GPS navigators can let drivers know the driving road. GPS navigators also provide full voice prompts, so that drivers can achieve the whole process of navigation without observing the display interface, making driving safer and more comfortable.
However, due to the fact that GPS vehicle navigation systems have just started in the Chinese market, the market atmosphere is not as mature as GPS vehicle tracking systems, but no one denies that this burgeoning market has unlimited potential for appreciation. With the development of China’s automotive industry and the gradual maturation of the automotive electronics market, consumers are increasingly seeking convenience and practicality. According to this trend, some well-known domestic automobile manufacturers, such as FAW, FAW, Shanghai Volkswagen and GM, have plans and actions to use GPS navigation systems as standard equipment in luxury cars or ordinary cars.
function
1. Navigation function
After the user marks two points arbitrarily on the vehicle GPS navigation system, the navigation system will automatically design the best route for the owner according to the current location. In addition, it also has a modification function. If the user accidentally misses the intersection and does not take the best route recommended by the vehicle GPS navigation system, and the vehicle position deviates from the best route trajectory by more than 200 meters, the vehicle GPS navigation system will re-design a route back to the main route for the user according to the new location of the vehicle, or design an optimal route for the user from the sexual position to the destination.
2. Switch to the voice prompt function
As long as the vehicle encounters an intersection or turn in front, the on-board GPS voice system prompts the user to turn and other voice prompts. This can avoid detours for the owner. It can provide full voice prompts, and the driver can realize the whole process of navigation without observing the display interface, making driving safer and more comfortable
3. Add points of interest function
Since most cities in our country are in the construction stage, new buildings may appear anytime and anywhere, so the update of electronic maps has become a concern for many consumers. Therefore, if you encounter some target points that are not on the electronic map, as long as you are interested or think it is necessary, you can add the point or new route to the map. These new points of interest, like any original point on the map, can be applied to functions such as electronic map viewing.
Step 4 Positioning
GPS can accurately determine its location by receiving satellite signals, with a position error of less than 10 meters. If the machine has a map, it can mark the corresponding position on the map with a mark. At the same time, GPS can also replace the traditional compass to display directions, replace the traditional altimeter, and display altitude and other information.
5. Speed measurement
Through the GPS reception calculation of satellite signals, the specific speed of driving can be calculated, which is much more accurate than a general odometer.
Step 6 Show track
If you go to an unfamiliar place and someone leads the way, what should you do when you come back? Don’t worry, GPS has a track recording function that can record the route your vehicle has traveled, with an accuracy of less than 10 meters, and even display the difference between the two lanes. When you come back, the user can activate its return function and let it lead you home smoothly along the route you came from.
