When it comes to autonomous driving, it always feels like a world away. After all, this kind of bridge often appeared in earlier science fiction movies, but at that time few people would really believe that autonomous driving would one day enter people’s lives, or It can also be said that at least it has not entered people's lives so quickly. In just a few years, many models equipped with L2 autonomous driving functions have emerged on the market, especially our own brands are very active.
Among its own brands, Changan Automobile can be regarded as one of the pioneers. Since 2016, Changan will conduct road tests of autonomous driving almost every year, and gradually apply these research and development results to mass-produced vehicles. Although everyone cannot go to the scene to participate in the Changan Autonomous Driving Road Test this year due to the impact of the epidemic, this time Changan hosted an online live broadcast, allowing more people to see the road test.
This test is the L3 level autopilot technology, and the model equipped is the Changan UNI-T, which will debut on the world online on March 5.
This car is the first model under the new long safety sequence. It is built based on a new architecture platform. It is positioned as a crossover SUV, unlike the "CS family" we are very familiar with. The design of this car pays more attention to the sense of science and technology. Trendy. Changan Automobile officials also stated that UNI-T represents T-shaped youth with geek spirit, and the audience is the younger generation of consumers with diversified car needs.
At the level of autonomous driving technology, according to the official introduction, the perception range of the L3 autonomous driving system on the car covers 3 360-degree external environment perceptions, integrating 3 kinds of sensor systems with different physical characteristics, and the front can achieve 5 levels of perception Redundant, the maximum detection distance is greater than 200 meters, and the measurement accuracy can reach 10 cm.
adopts 5 millimeter wave radars, 6 cameras, 12 ultrasonic radars as the main sensors, which can effectively identify vehicles, pedestrians, cyclists and other targets and obstacles in the driving environment of the vehicle. At the same time, it can perceive the driver’s field of vision, fatigue, etc., and provide a reliable basis for the intelligent decision-making of the automatic driving system. It can also effectively identify information such as lane lines, guardrails, and traffic signs. Combining high-precision map and ADAS map road information, the highest possible Real-time acquisition of road information within 8 kilometers to achieve lane-level high-precision positioning and precise path planning can effectively ensure the accuracy of autonomous driving tasks.
It is worth mentioning that the L3 level autopilot system of this road test was completely independently developed by Changan Automobile, which can be said to have achieved a technological breakthrough.
Next, let us see how this autopilot-equipped model performs in the actual test?
below the L3 level, the vehicle can realize the automatic driving of most road conditions and take over most of the driving functions of the car. But in the L3 stage, the driver still needs to keep attention at all times to take over the vehicle in time when an emergency occurs. At this level, the importance of the driver is significantly reduced. Just like the examiner staring at the students not to cheat, they need to pay attention to the road condition information at any time to prevent the car driving system from not knowing how to deal with unrecognized road conditions.
We can see that when the driver turns on L3 autopilot in the live broadcast, he can completely release his hands and feet to follow the car automatically, only need to look straight ahead. Of course, if you are distracted, a corresponding warning sound will be issued. , And this road test is an open road test, real road driving.
Under 40km/h or under congested road conditions, it can also achieve long-term removal of feet, hands, and eyes until the system reminds to take over. If the user does not take over after reminding to take over, the risk mitigation strategy will be implemented and the vehicle will slow down. Although this technology is very advanced, I still suggest that you don't try to "out your eyes" lightly.
During driving, when an adjacent vehicle cuts into the front of the vehicle, the system will automatically adjust the speed to keep a safe distance from the vehicle that cuts into it. If you want to change lanes, when the vehicle speed is higher than 50km/h, after the driver turns on the turn signal, the system monitors the feasibility of the lane change and controls the vehicle to automatically change lanes to the adjacent lane in the direction of the lamp.
The whole driving process is very stable and safe, but it is worth mentioning that the car isThe user needs to take over when cornering, and the L3 autopilot system carried by the car can only adapt to structured roads, that is, highways, urban arterial roads and other well-structured roads, which have clear road markings. The background environment of the road is relatively simple, and the geometric characteristics of the road are also obvious. It also means that if you walk in the city, you still cannot achieve autonomous driving. After all, China's urban roads are too complicated, and our technology still needs to improve.
Actually, from the above, we can deeply feel the convenience of L3 autopilot technology. Although many people will complain about the "chicken ribs" of L3 autopilot technology, its existence still gives a good transition from L2 to L4. With the improvement of relevant domestic laws and regulations, automatic driving under certain working conditions may be realized in the future, and when car owners gradually become accustomed to the new driving mode, the automobile market is believed to have a new situation. As one of the pioneers, Changan, and its UNI-T equipped with L3 autopilot technology may become the darling of this wave of dividends. In addition, officials revealed that the UNI-T equipped with L3 autonomous driving will or will be put on the market in batches within this year, and we are also looking forward to its performance in the future.
