Car engines are becoming more and more powerful. The quality of a car engine may directly affect the sales of the car, but here I have a question for netizens - what is the most commonly used system for your car engine? What are the three functions?
If it were me, they would be Bluetooth music, car navigation and reversing image. If your car is more advanced, you may replace the Bluetooth music with something like Himalayan, but the application efficiency of car navigation should be the highest. Even if you say you are using Carplay, you are only using a third-party plug-in for navigation.
When it comes to navigation, many people blurt out, I am familiar with that thing, GPS! Here I want to say NONONO. The full name of the GPS you mentioned is the Global Positioning System. Its purpose is to provide you with global positioning. It was built by Americans in the 1990s. To put it bluntly, this is a set of dual-use products for both military and civilian use.
In fact, around the world, not only GPS can be called a satellite navigation system, Europe has Galileo, Russia has GLONASS, and China has Beidou positioning system.
Speaking of the Beidou Navigation System, the full name is the China Beidou Satellite Navigation System. This is a fully autonomous satellite navigation system that was developed in the 1990s. This system has gone through three stages, 00 The Beidou 1 system built around 2012 supports nationwide navigation and positioning. The Beidou 2 system built in 2012 can support navigation and positioning in the Asia-Pacific region. The Beidou 3 system applied in 2020 supports global positioning and navigation. . At present, the entire Beidou system has a total of 30 satellites operating in the sky, which can bring the positioning accuracy to the centimeter level, the timing accuracy is only 10 nanoseconds, and the speed measurement accuracy reaches 0.2 meters/second.
After briefly introducing the Beidou system, many people will ask, does this have anything to do with the navigation we use every day? We seem to have never used the Beidou navigation system!
Actually, this is a big misunderstanding. Have you never used Beidou Navigation? Have you ever used Amap? In 2020, Beidou and Amap jointly launched lane-level navigation. This function covers hundreds of models including Huawei, Xiaomi, Honor, etc., and can support dozens of cities including Beijing, Shanghai, Guangzhou, Shenzhen, Hangzhou, and Chongqing. A medium to large city. Especially in mountainous cities like Chongqing, the advantages of lane-level navigation are obvious. You no longer have to worry about missing an intersection and having to go around the city.
In July 2020, Baidu Maps also reached a cooperation agreement with Beidou and completed the upgrade of high-precision navigation. The global positioning accuracy is better than 5 meters! In April 2021, Tencent Maps also became compatible with the Beidou navigation system, which also marks that all three major domestic navigation software are compatible with the Beidou navigation system.
I need to emphasize here that being compatible with Beidou Navigation means that they will support receiving Beidou Navigation satellite signals to support more precise positioning. But, ah, but, whether you can receive the signal depends on whether your navigation chip supports the Beidou navigation system. It is very simple. If you are using an Apple mobile phone to project CARPLAY for navigation, then I am sorry, because the chip inside the Apple mobile phone does not If it supports Beidou, you can only use the positioning service provided by GPS satellites when navigating.
Then a question arises, why can we still use lane-level navigation services without Beidou signal? This involves positioning fusion technology. What is positioning fusion technology?
To put it simply, it is a technology that uses a variety of different positioning technologies to combine positioning to confirm the accurate location. For example, someone proposed the integrated positioning technology of the Beidou system and the 5G network. The Beidou system is used to perform planar positioning of position coordinates, while stereo positioning takes advantage of the large number of 5G network signal base stations and can achieve decimeter-level positioning through signal feedback from each base station. This technical principle is actually very complicated, so I won’t go into details.
At present, the positioning fusion technology of the Beidou system is widely used because it is relatively open. For example, the No. 71 bus in Shanghai uses Beidou positioning in order to achieve real-time position broadcast and accurate station reporting. , gyroscopes, inertial navigation and other positioning fusion technologies can achieve seamless and accurate station reporting.
In fact, systems like the Beidou system that can provide advanced services for our driving are currently widely used in China. However, compared to the American GPS, our Beidou is relatively low-key. That’s all. Nowadays, Beidou’s positioning and navigation system has been compatible with most mobile phones and cars. Therefore, you may wish to take a look at how many Beidou satellites you use in your daily navigation when you have time, and then tell me in the comment area. Bar.