Are you online? L3？ In the automatic driving mode, Liang Fenghua, director of the Intelligent Driving Institute of Changan Automobile Intelligent Research Institute, let go.

3? Month? 10? God, Chang 'an? UNI-T？ Make your debut on the open road of Chongqing? L3？ Autopilot technology, Zhu Huarong, president of Changan Automobile, sat in the co-pilot and participated in the whole process? 23? The experience of kilometers, the scenes covered by vehicles include: automatic lane change, safe cornering, and safe handling of overtaking in traffic jams.

After the live broadcast of the test ride experience, everyone's curiosity followed:

Changan? L3？ Is the autopilot technology really mature? Chang' an Wei? L3？ What attempts and efforts have been made behind mass production? Is the most controversial and concerned "eye" safe enough for users to use?

2. According to the Classification of Automobile Driving Automation? L3？ Level-oriented development

At present, the level of automatic driving is mainly divided into international society of automation engineers? SAE？ Standards and the American Highway Safety Administration? NHTSA？ Standard.

Because? SAE？ The standard is more detailed, so it is adopted by many car companies.

What about Changan Automobile? L3？ Automatic driving technology is in accordance with the classification of automobile driving automation (draft for approval) (proposed in? 202 1? Year? 1? Month? 1? On the day of implementation? L3？ Levels of development goals.

In the drafting and formulation of this standard, Liang Fenghua, director of Intelligent Driving Institute of Changan Automobile Intelligent Research Institute, is one of the main authors.

Contrast? SAE？ Description, China version of the automatic driving classification standard and? SAE？ Roughly the same.

According to the standard of automatic classification of automobile driving: 3? The first level is a conditional autopilot, which only needs to be started under the design working conditions, namely:

The system will be able to achieve conditional automatic driving, and all driving operations will be completed by the automatic driving system. Under some conditions, L3? Where is the automatic driving class? L2？ On the basis of liberating hands and feet, it can also liberate people's eyes.

Besides, comparison? L2？ Class automatic driving, L3? The monitoring ability of the system environment is higher, and the driving responsibility is shared by the driver and the machine.

Simply put, in? L3？ Under the operating conditions specified by the automatic driving system, the vehicle itself can complete tasks such as steering, acceleration and deceleration, road condition detection and response. When the system fails or exceeds the working conditions, the driver needs to take over the faulty vehicle.

So how does Changan Automobile refer to this grading standard? L3？ What is the product definition of autonomous driving?

Why don't you go to Chang 'an first? UNI-T？ On the model? L3？ Sensor combination of automatic driving system: mainly composed of vehicle domain controller, 5? A millimeter wave radar, 12? Ultrasonic radar and? 6? A camera, Adas? Maps and high-precision maps.

It is worth noting that sensors in Changan, such as millimeter-wave radar and ultrasonic radar, are provided by Bosch. According to an insider, the domain controller is provided by United Automotive Electronics Company.

From this perspective, where is Chang 'an? L3？ In research and development, it mainly undertakes algorithm research and development and post-testing at the software level.

In implementation? L3？ In the mass production process, Changan mainly did the following work:

Establish the software development process of autonomous driving (CA-SDS);

All algorithms of vehicle domain controller are independently developed by Changan, and all system algorithms have independent intellectual property rights.

Completed tens of thousands of scene matching tests, 5000? Ten thousand kilometers test mileage, of which? 200? 10,000 kilometers is a real car test;

Perceived range coverage? 3? Answer? 360? Perceive and blend in with the environment outside the car? 3? In which front end are the three sensing systems with different physical characteristics realized? 5? Re-perceive redundancy.

After these tasks are completed, in some scenes, such as highways and urban expressways, once traffic jams occur, you can take off your feet, hands and eyes for a long time until the system reminds you to take over. What is the maximum speed supported? 40 kilometers per hour.

If the user does not take over after being reminded, the risk mitigation strategy will be implemented to slow down the parking speed.

2. Conditional "enucleation"

Are you online? 3? Month? 10? In the live demonstration of the day, bring? L3？ Changan of autonomous driving technology? UNI-T？ It is to free your hands and feet and even drive with your eyes on structured roads (highways, urban viaducts).

Drivers are required to drive on unstructured roads (other roads, sidewalks and traffic lights in urban areas).

Objectively speaking, because the structured road is a closed section, pedestrians and non-motor vehicles will not suddenly appear, so the challenge to autonomous driving is relatively less difficult.

Are you online? L3？ In automatic driving mode, the host computer counts down the time when two people look at each other.

According to Zhu Ronghua, Changan Automobile, right? L3？ The definition of "out of sight for the net" in autonomous driving is:

When the speed is lower than. 40? Km, Chang 'an? UNI-T？ Highway driver assistance function (HWA) can be turned on. At this time, the driver can take off his hands, feet and eyes, and the automatic driving system controls the driving of the vehicle.

Is the speed higher than? 40? Km, you can take off your hands and feet, but you can't take off your eyes

For the division between man and machine:

As long as the road conditions meet the requirements of automatic driving, people can take off their hands, feet and eyes. In the meantime, if any accident happens, the responsibility lies with the car.

In the case of not meeting the conditions of automatic driving, such as the speed is higher than on this road? 40? Km/h, you can take off your hands and feet, but you can't take off your eyes. If something goes wrong, it's the driver's responsibility.

What needs to be distinguished is: in? L2？ In the class-8 autopilot system, although the system can provide driving assistance, and even let the driver get rid of it for a short time, the driving responsibility lies with the driver himself, and the system will not be responsible for its own auxiliary functions. And then what? L3？ The Level-8 autopilot system is different, and the system will be responsible for driving behavior.

So, what about Chang 'an? L3？ How is the performance? How difficult is L3 autopilot mass production? In the official video, Changan Automobile released these data:

-? 120h？ Take over once;

-? Single response? 50ms

-? The distance between the identified vehicle and the stationary vehicle in front is ≥60? Rice;

-? Identify the distance of vehicles driving in front of adjacent lanes ≥80? Rice;

-? Identify the distance of vehicles driving in front of this lane ≥ 100? Rice;

……

When getting these test results, an engineering teacher of Changan Automobile breathed a sigh of relief: L3? It can finally be mass-produced!

Changan? L3？ What is the level of autonomous driving technology? Maybe it can't be explained by a live broadcast experience, but according to the information released by Chang' an:

Changan automobile? L3？ Sensor combination for autonomous driving: vehicle domain controller, 5? A millimeter wave radar, 12? Ultrasonic radar and? 6? A camera, Adas? Maps and high-precision maps, this is not a new hardware architecture, and there have been mass production precedents before, such as GM? Super? Cruise, Nissan? Propilot？ Wait a minute.

But what about Changan? L3？ Autopilot, compared with many years ago? L2.5？ And what about the new one? L2.9999, without word games, it is more "bold". After all, Zhu Huarong personally went into battle to publicize, and naturally he was very sure of Chang 'an? L3？ Autopilot technology.

Changan in the car at this time? L3？ The biggest attraction of automatic driving live broadcast is that there is no time limit in the case of congestion, which is related to the present? L2？ The biggest difference between autonomous driving.

Of course, how do they use it correctly when it is finally delivered to consumers? L3？ Level 8 autopilot function still needs correct guidance and education. After all, Tesla drives automatically? Several fatal accidents have sounded the alarm for the automobile industry.

Strictly speaking, carrying? L3？ Changan of self-driving car system? UNI-T？ Because the relevant policies and regulations have not yet been promulgated, it is considered as "futures". What has Zhu Huarong, president of Changan Automobile, experienced? 23? The distance of kilometers was also reported to the traffic control department in advance.

It is reported that Changan? UNI-T？ Will it be this year? 6? Listed in June, what's the price? 1 1? Ten thousand to? 15? Between ten thousand yuan.

Maybe compared to China's "first"? L3？ The title of "autonomous driving mass production", Chang' an? UNI-T？ The first big foreign show? L3？ The greater significance of autonomous driving technology is to let it be carried? L3？ Self-driving low-end models reach more user groups.

This article comes from car home, the author of the car manufacturer, and does not represent car home's position.