[YesAuto Security Technology] Everyone is equal before the law. Of course, equal human rights can also be seen in cars. At present, the increasing emphasis on pedestrian protection in the world reflects the equal relationship between drivers and pedestrians. For example, pedestrian protection is an important consideration in the E-NCAP new car evaluation regulations in Europe. Moreover, in the passive safety and sensor China Technology Summit held by Continental recently, some content for pedestrian protection was also mentioned. Now let’s take a closer look at the special care that cars have on pedestrians.
● “Sniff” to know the danger in advance
-Active brake assist system
What is the best pedestrian protection? Yes, just don't hit people. Therefore, for the driver, it is necessary to predict the pedestrians who suddenly jump on the road in advance. However, more and more traffic accidents show that drivers often distracted during driving, leading to tragedies. At present, the latest active brake assist system can replace people to automatically complete emergency braking or deceleration.
Using the camera, the Audi Q7 can “sniff” the danger of collision with pedestrians early, and then transmit the received signal to the ECU. After the ECU judges, it will issue instructions to the actuator. At this time, the vehicle will use the sound and light reminder in the car to warn it. The driver, if the driver does not make any response due to factors such as fatigue driving, the active brake assist system will intervene in time when a collision is about to occur. However, the active brake assist system does not stop the vehicle immediately, because the ECU will consider the current vehicle speed and the driving conditions in the front and rear to determine whether to decelerate or stop in an emergency. Please see the video below for the specific process.
– “you are my eye”
Of course, there are some smarter manufacturers, such as Continental. They show a new concept of pedestrian protection. In the future, they will use sensors of other vehicles to indirectly know the location information of pedestrians, and slow down or stop in advance. This also saves part of the research and development investment to improve the detection capabilities of radars and cameras. . However, there are many problems at present. For example, the construction of infrastructure and the disclosure of the location information of vehicles will involve the leakage of personal privacy, the degree of openness between automakers, government laws, and so on.
-Proactively remind pedestrians
Nowadays, the NVH (Noise, Vibration, Harshness) characteristics of automobiles are getting better and better, and the driving noise is getting lower and lower, but for pedestrians, sometimes this may not be a good thing. Especially when electric vehicles are driving at low speeds, it is almost difficult for pedestrians to discover the existence of these “ghosts”, so there are certain hidden dangers of accidents. To solve this problem, Nissan has launched an eVader system that actively prompts pedestrians.
● Rescue in the event of a collision
Although the automatic brake assist system and the active pedestrian prompt system can well protect the safety of pedestrians, it is inevitable that there will be tragic moments. At this time, the passive safety measures of the vehicle itself have come into play. When it comes to passive safety, most people first think of the protection of the drivers and passengers in the vehicle. So how does the passive safety device guarantee the layperson of the car?
-Structural design of engine compartment cover, bumper, etc.
When a car collides with a pedestrian, the lower leg or knee joint of the pedestrian will generally be injured by the front bumper of the car first, and if it is an SUV model with a higher chassis, the thigh may be injured first, and then the pedestrian's body will be rotated by the impact. , The head is likely to hit the engine compartment cover or front windshield glass. Therefore, rationally reducing the rigidity of the front bumper and engine compartment cover that are in contact with the body and optimizing the structure are effective measures to reduce the injury to pedestrians.
-Active engine compartment cover technology
On the basis of optimizing the structure of the engine compartment cover, Volvo, Land Rover, Nissan and Continental have further introduced active engine compartment cover technology. It uses the pressure sensor of the front bumper to detect whether a pedestrian collision accident occurs, and then uses a special lifting mechanism to lift the engine compartment cover a certain distance in a short time, so that when the pedestrian's head or torso and the engine compartment cover happen During impact, more buffer space can be obtained to avoid violent collision with the rigid engine body.
For the protection of pedestrian collision safety, Volvo, which has always been the main safety card, has done more comprehensively. For the first time, the Volvo V40 is equipped with a pedestrian airbag. It is monitored by sensors on the front bumper. If there is a collision with a pedestrian, the rear of the engine compartment cover will automatically lift up to a certain height. At the same time, the hidden airbag is released, wrapping the part of the front windshield and the windshield that may cause greater damage. The A-pillar achieves the cooperative protection effect of the active engine compartment cover and the airbag.
The relevant person in charge of the C-NCAP collision laboratory revealed that the evaluation of pedestrian protection will be introduced in the 2018 version of the C-NCAP collision experiment scoring standard, which also indicates that there is an increasing focus on equality between drivers and pedestrians in China. Security relationship. In the future, we will also see more vehicles equipped with pedestrian protection systems. Perhaps they will use different methods, such as adding active brake assist systems or active engine compartment cover technology to ensure the safety of pedestrians, even as the future autonomous driving technology matures. , The Internet of Vehicles system will also realize the care for pedestrians. In short, we can have more peace of mind when walking on the street in the future, but the premise must not violate the traffic rules!