Basic knowledge of vehicle-mounted GPS navigation

frozenviolet

Basic knowledge of vehicle-mounted GPS navigation [Copy link]

As early as the 16th century, in order to avoid getting lost, navigators needed three essential navigation tools: nautical charts, compasses, and theodolites. Navigational charts provide geographical information, compasses provide directions, and theodolites are used to determine the position of the fleet and to formulate routes. However, theodolites can only provide coarse-precision positioning. If you want to provide positioning accurate to tens of meters or even more than ten meters, you must rely on more advanced technology-GPS. GPS technology was mainly used in the military field in the past, but it is now quietly "marrying" cars and approaching our daily lives. GPS can be seen in applications such as vehicle navigation, tracking, anti-theft, and dispatch management. In particular, by the end of 2004, the number of cars in China had reached 11 million. Coupled with the momentum of the 2008 Beijing Olympics, the application of GPS in the civilian field is spreading like wildfire. However, in the face of a wide range of GPS products, what can GPS achieve? What is the difference between navigation and tracking, and how to choose a GPS navigation system that suits you? Many users are still not very clear, so I will explore with you what changes and fun GPS brings to our lives. The difference between tracking and navigation GPS is the abbreviation of Globle Positioning System, which means global positioning system, including 24 artificial satellites and five ground stations, so as to provide precise positioning. On this basis, different functions are integrated to finally realize the functions of tracking, anti-theft and navigation. Therefore, the functions of vehicle tracking system and vehicle navigation system are completely different. Vehicle tracking system is mainly used for anti-theft, monitoring, etc. When a car is stolen, the owner wants to know where the car is. If a GPS system terminal is installed, the precise location of the vehicle can be obtained through its GPS module, wireless communication module, and service center monitoring system to assist the public security department in catching the thief. In addition, the vehicle tracking system can also realize management functions such as dispatching, commanding, and monitoring, which is relatively practical in the fields of taxis, buses, logistics and distribution. But for business users, it involves personal privacy issues and they do not want to be monitored all the time, so vehicle tracking is not suitable for all users. In addition, the vehicle tracking system usually has to pay a certain service fee to the control center. The vehicle navigation system is similar to the theodolite and nautical chart in the hands of a navigator, except that the map and positioning accuracy is much higher and it is available to a wider range of users. As long as the car owner receives satellite signals through the GPS module and then uses the electronic map data, he can always know his position and destination. If you arrive in an unfamiliar area, or get lost in the wild, or want to find information about nearby gas stations, parks, etc., you can use the GPS navigation system to design the best route and provide voice navigation prompts, making travel safer and more convenient without the risk of getting lost. The vehicle navigation system usually does not require additional service fees to the center.

zb0502

The comparison is very good

xuyijun2006

I have CANBUS communication protocols of major automobile manufacturers, automobile diagnostic protocols and original diagnostic instrument related protocol data, which are used to develop diagnostic instruments, on-board computers, read original car data and other functions! The car models are complete, and the data covers almost all communication protocols on the market! If you need it, please contact QQ: 8· 9· 6· 4· 3· 1· 2 ·9 ·6