Traffic accidents can be said to be the "original sin" of car manufacturers. Technologies that are expected to prevent traffic accidents have already been introduced. According to data from the Japanese Police Agency, pedestrians ranked first among the number of people killed in traffic accidents in 2010. Now, pedestrians can be identified, and anti-collision systems that automatically stop before a collision have been commercialized.
The first commercial anti-collision system in Japan is Fuji Heavy Industries' "EyeSight (ver. 2)". In May 2010, it was sold as an option for the main model "Lion", and it was sold well. The assembly rate accounted for more than 70% of new car sales.
100,000 yen anti-collision system
EyeSight is realized by a module that integrates a stereo camera with two left and right cameras, an image processing semiconductor, and a semiconductor for vehicle control. Set on the upper part of the front window glass.
First, comparing the left and right stereo camera images, the left and right deviation of the shooting angle will cause the pixel position deviation. Based on this deviation, the distance between the car and obstacles such as cars and pedestrians is calculated. According to the distance and the speed difference between the car and the obstacle, the collision prediction time of the obstacle is inferred.
During driving, the car is getting closer and closer to the obstacle. About 3 seconds before the collision prediction time, the system calls the driver's attention through the sound and the blinking of the indicator light. Even so, when the driver still did not brake and steered the steering wheel to avoid the behavior, the system braked lightly about 2 seconds ago. It also reminds vehicles behind by turning on the brake lights.
About 1 second before the collision, the system completely braked and stopped before the collision. According to reports, collisions can be prevented under conditions such as dry roads, four people riding, and speeds below 30km per hour.
The system analyzes the images of the stereo camera in an instant and treats people as obstacles.
Guan Guanshou, Head of Electronic Product Design Department of Subaru Technology Division, who participated in the EyeSight development, pointed out when reviewing the development process, "The outline of the car is clear and characteristic, so it is easy to automatically identify, and pedestrians are difficult to identify because of the relationship between clothing and movement. We drove a distance equivalent to a few weeks of the earth and accumulated pedestrian data. "
However, you cannot rely too much on the system. In the case of slippery road surfaces and tire wear, it is sometimes difficult to completely prevent collisions. The gate explained: "EyeSight should be used as the last method to prevent collision".
The main reason for the popularity of EyeSight is the low price, only 100,000 yen. In the past, in order to measure the distance to the obstacle in front of the car, expensive components such as millimeter-wave radar and cameras were used in combination, and the sales price was more than several hundred thousand yen. And Fuji Heavy Industries only achieved this function by stereo cameras and components.
In fact, the key to the collision avoidance system-the technology to measure the distance to the obstacle in front has been established. And it has been used in high-end cars and other models, and no abnormalities have been found, so why is EyeSight the first anti-collision system in Japan?
The reason lies in the safety policy formulated by the Ministry of Land, Infrastructure and Transport of Japan.
Before 2009, the use of an automatic braking system to brake before a collision was not legally permitted in Japan. The automatic braking system is only allowed to reduce injuries after a collision. Although the system was not based on the operation judged by the driver and there was a question of how much automatic control was allowed, the restrictions on the system were later relaxed.
Japan ’s first car that allows the use of an anti-collision system is not a domestic car but a Volvo. Volvo negotiated with the Ministry of Land, Infrastructure, Transport and Tourism in Japan in August 2009 to standardize the "City Safety" function of the "XC60" SUV (multifunctional sports vehicle) launched in Japan in August 2009 to prevent rear-end collisions with vehicles in front of 15km / h. The reason for the approval seems to be that XC60 was listed overseas in 2008 and accumulated a lot of application data.
　
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