Every driver must have experienced the “ghost probe”. He will not give the driver reaction time to reduce collision damage. During the normal driving of the vehicle, pedestrians appear from the blind area of vision, and Volvo automatically brakes, which arouses the attention of many professionals and netizens. What do you think of this?

Speaking of this topic, I thought of the zebra crossing in front of the main entrance of my community. The road it crosses is an urban secondary arterial road with a two-way six-lane design (three lanes in each direction) and a large traffic volume. The zebra crossing itself is not equipped with signal lights. Instead, an inverted triangle + double dashed line is painted on the road to decelerate and yield. In theory, this is a fairly reasonable design. If everyone abides by the rules, it can take into account the efficiency of both pedestrians and vehicles. However, things backfired. It may be the reason why my city is not severely punished for impolite pedestrians. Most drivers do not have the awareness of “the highest pedestrian right of way on zebra crossings”. Drivers who are willing to be courteous are rare, even flashing lights and horns. There are a lot of people on the throttle to speed up the road. This makes pedestrians on this zebra crossing, or they have to wait endlessly for drivers who are willing to stop and give way, or they have to see the stitches and fight with flesh and blood and speeding vehicles. The poor experience is second. The risks among them are the most worrying. After all, I often pass the zebra crossing mentioned above as a pedestrian, so when I drive through, part of it is because of empathy, and more because of observance of traffic rules. If you see there is waiting for passage Pedestrians will stop and be courteous. But embarrassingly, I stopped. The car in the lane next to me will probably stop following me. Pedestrians are still unable to pass. What’s more, at this time, my car will become an obstacle that obstructs the sight of both pedestrians and drivers, which directly creates the most perfect conditions for the appearance of “ghost probes”, especially for short stature (more easily The risk is even greater for children with insufficient traffic safety awareness. In fact, this is really just a typical case. There are countless similar scenes all over the country. There are nearly 20,000 children under the age of 14 killed in traffic accidents every year in my country, ranking first in the world. This shocking figure has a considerable percentage behind it because of such a scene. “The road is like a tiger’s mouth” is by no means alarmist. Children’s Day is approaching. When everyone is planning how to celebrate the holiday with their children, the thought that so many families will never have the opportunity to celebrate, it is really too worrying for people like us who are already parents. To improve the status quo, the most direct way is for every driver to start from himself, abide by the laws and regulations, and drive cautiously. But regardless of whether such a possibility exists, even if everyone is willing to do so on a subjective level, at an objective level, can everyone be able to keep driving without distracting themselves? Can everyone respond promptly and correctly when encountering emergencies? Take the “ghost probe” scenario just mentioned as an example. The danger is that the process is extremely sudden and the reaction time for the driver is very limited. Not to mention that not all drivers can take timely action to avoid, even if they react. It is still a question mark whether the operation is correct and effective in a hurry. The most feared is that the operation error not only fails to avoid the danger, but also causes more accidents and causes more injuries. Therefore, the value of the active safety system has been reflected, and the incident mentioned in this question is one of the best examples. At present, most of the active safety systems on the market are specifically calibrated for a series of common high-risk scenarios, including “ghost probes”. Understand that the active safety system made by Che Di some time ago is in the big horizontal evaluation, you can It can be seen that there are still many models that can avoid such accidents within a certain speed range, and at the very least, they can also reduce injuries. But the fly in the ointment is that in the Hengping review, we found that most models respond to this scenario by simply using AEB braking to decelerate, and the experimental conditions set by the car emperor are actually relatively ideal. It is possible in reality. It is impossible to guarantee sufficient distance for braking. To avoid accidents, it may be necessary to evade direction. If AEB is not well calibrated, it may disrupt the rhythm of the driver’s avoidance operation, and even occupy too much grip of the tires. The effect of the avoidance operation is compromised. To a certain extent, it is a distance between ideal and reality. But this kind of distance seems to not exist in Volvo’s models: Volvo, as a camera in the Youku video v.youku.com video, not only did not slow down because of the short distance, but also helped driving. The operator completed the emergency line change and finally successfully avoided the danger. It can be said that at least in this case, the active safety system of the video shooting vehicle has reached our current highest expectations for similar functions. However, one point needs to be corrected. In the video, the driver said that the car “changes the route by itself” to avoid obstacles, but in fact, according to the information displayed by Volvo officials, what played a role in this case was included in Volvo City Safety. The emergency steering assist function in the system function package does not include the setting of crossing the driver to make a decision to change lanes in its operation logic. Instead, it will be transparent at the moment when an impact is about to occur and the driver intends to avoid the impact by turning the steering wheel. The brake assists the steering of the vehicle and increases the steering force of the steering wheel, so that the entire line change action is faster, more efficient and safer. However, due to the extremely fast system intervention speed, the driver may only start to make a little movement on his hand, and the vehicle will quickly complete the next operation, so that the driver has the illusion that the car is “changing itself”. Regarding the working principle of the emergency steering assist function, if the above text description is not clear, I also found the video introduction material: Youku Video​v.youku.com I have to say that years of research in the field of safety have indeed enabled Volvo to compete with All aspects related to it have achieved a more extreme height than friends. For example, the City Safety system mentioned just now, as a package containing multiple functions, in addition to the most praised emergency steering assist function on the Internet, other aspects of functional performance are also the first of its kind. Echelon. The first is the breadth of scene adaptation. Volvo City Safety covers a wide range of working conditions. Its identifiable objects include other vehicles, cyclists, pedestrians and even large animals, while the available scenarios are facing/same direction vehicles from the front. Collision, pedestrian/cyclist/animal crossing the road, and even collision at intersections are all taken into account, and it can be used at night (dark environment). Under this premise, the collision avoidance (relative) speed thresholds for vehicles, cyclists and pedestrians have also achieved 60km/h, 50km/h and 45km/h, which are almost the highest level in the industry. Drivers should be able to understand that urban operating conditions are basically the operating conditions with the most complex environment and the most risk sources. Therefore, since Volvo can make City Safety so perfect, optimization for other operating conditions must be more handy. Brought it. For example, when a vehicle leaves the city and reaches a higher speed section, for a speed range of 60km/h higher than the City Safety working limit, there will be an ACC adaptive cruise control system based on Pilot Assist and automatic follow-stop. , And ADAS advanced driving assistance realized by functions such as lane keeping assist, to help reduce the burden on the driver while improving driving safety. It is worth mentioning that the new XC60 also adds a DAI ready-to-leave notification that can alert the driver when the vehicle is about to leave the congested zone in the ADAS package, and can be used after monitoring (steering wheel) without input for a long time. The ESA Emergency Stop Assist, which stops the vehicle smoothly and turns on the warning lights, is a more comprehensive containment of possible risks. Regardless of whether the vehicle is entrusted to ADAS or the driver is controlled by himself, Volvo’s exclusive features such as road departure protection and oncoming vehicle intelligent avoidance will escort all the way. For example, for ultra-low speed conditions below the City Safety start threshold of 4km/h, Volvo provides auxiliary functions including rearward collision warning system, backward active braking, and reversing side warning system (with brake assist), etc. It can ensure that when the vehicle starts/parks, the driver and other traffic participants around the vehicle are still fully protected during the short period of time in the parking lot. In addition, Volvo has made some targeted optimizations even in the relatively high penetration rate now, and many other brand models have more basic safety configurations, so as to achieve “everyone is equipped, but in The results above are better for me.” For example, in the dynamic stability control of the vehicle, it is a functional combination of ABS+TSC+ESC in many other models, but Volvo integrated it into the DSTC dynamic stability and traction control system, and then subdivided AYC into scenes. The four functions of active yaw control/yaw angle control, UCL understeer control logic, ASC active stability control, and DSR driver steering suggestion can achieve more nuanced dynamic control effects of the body. Among them, the DSR driver’s steering suggestion especially needs to be mentioned. It will even make suggestions to the driver to correct the steering angle input according to the current vehicle condition. On the one hand, it avoids the risk caused by human error in judgment to the greatest extent. On the other hand, it will not skip the rough intervention of the driver, and still leave the decision-making power in the hands of the driver. Indeed, from a functional perspective, Volvo’s full set of driver assistance & active safety systems are actually only a step away from the so-called autonomous driving, but at least for now, as just mentioned, Volvo still sticks to its strategy very much, and still puts the driver’s judgment on top of the highest priority. Related functions in Volvo’s models are neither purely as a solution to the driver after operating errors, nor overly aggressively competing with the driver for vehicle control. Volvo has successfully turned the active safety function into the driver. The extension of consciousness and body, it organically forms a cooperative relationship with the driver, which also explains why it is easier to achieve more ideal functions than other brands in actual use. The effect of intervention. In fact, the working logic of emergency steering assistance in City Safety above has already well demonstrated this kind of calibration logic that the driver is always in the first decision-making order, and it is not only this function that can reflect this idea, but the facts. Almost all Volvo’s active safety functions mentioned above, especially the functions related to City Safety, basically follow the following logic for intervention: After detecting the risk, the first warning sound (didi beeping sound) Remind the driver to pay attention and give operation suggestions. At this time, if the driver can respond, the system will assist according to the situation to achieve the maximum risk avoidance effect. The system will only be used when the driver has not responded. Override the driver to take over the vehicle to ensure minimum protection. Personally, I still recognize Volvo’s values ​​very much. After all, the four words “people-oriented” are both respect and responsibility. It also places higher demands on the driver’s own safety awareness. To a certain extent, this can be regarded as returning to the most fundamental level to solve the problem of traffic safety.


By zhiwo

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7 months ago

In the past few weeks, I did a real test of the safety performance of Volvo xc60. When dealing with this kind of ghost probe, Volvo not only has a high recognition rate, but also has a timely braking response. It can even actively brake for vehicles that jump out from the side. stop. As far as I know, Volvo also specially customized the identification strategy for different animals in the past, in order to improve the use of the active brake function. So, how do you evaluate this incident? I think exam-oriented education can solve some of the problems, but only by engraving safety into DNA can the performance be fundamentally improved. On the surface, a simple stop, but behind it is a lot of research and development experience. After all, it is not difficult to stop once, and stop again and again is the skill. The safety king Volvo is indeed well-deserved, active and passive.

7 months ago

The emergency avoidance of vehicles is one of the skills of vehicle automatic driving to deal with accidents. In an emergency, do you dodge or brake? Currently, there is no fixed statement. Of course, human operations are more biased towards braking. Maybe the vehicle will choose to brake or dodge based on the actual situation. The elk test is a manifestation of the ability to dodge emergency (Supplement: Many people think that the first two videos say that the old driver is a bit dissatisfied. Yes, the real old driver should avoid this situation in the video, but what I want to express is, In the event of an emergency, how to do the correct “emergency dodge” action is that after the dodge is completed, the steering wheel immediately returns to the center. Many people do not have the awareness of actively returning to the center. I am talking about the old drivers who operate from safe driving. From its own point of view, it is the best policy to avoid “emergency situations”. In the event of an emergency, it is the middle policy to learn emergency dodge operations reasonably) and this Volvo XC60 uses the AEB function. Here, it is necessary to introduce related active safety functions. In fact, the era is now in 2021, and the active safety of vehicles has become the basic configuration of many smart cars. In the past, the functions that were only available on some high-end luxury cars, with the improvement of technology, the reduction of costs and the continuous improvement of people’s requirements, have gradually appeared in some less expensive vehicles. This time, I will talk about the forward collision prevention function in the active safety technology. The forward collision prevention function mainly includes three parts: FDM forward vehicle distance monitoring, FCW forward collision warning, and AEB automatic emergency braking (with Pedestrian detection). The driver is reminded in time to maintain a safe distance from the vehicle in front and provide active braking support when necessary. Effectively reduce the risk of collision and make travel safer. At the same time, comprehensive protection preparations are made for the occupants in the vehicle before the collision occurs, and the degree of injury to the occupants is minimized in the event of an accident to protect the safety of life. 1. FDM forward vehicle distance monitoring: When the speed of the vehicle exceeds the speed of the preceding vehicle and is lower than the safe driving distance, or a side car is blocked and cuts in and the vehicle is below the safe distance, only a prompt is given. 2. FCW Forward Collision Warning: When the vehicle may have a frontal collision and rear-end collision danger, remind the driver to pay attention. 3. AEB automatic emergency braking (with pedestrian detection): When the vehicle may have a frontal collision or rear-end collision, the system will intervene in braking to avoid the occurrence of a forward collision or reduce the damage of the collision. However, the triggering of these functions is subject to certain conditions. The first is that this function must be turned on on the large screen or button, and then meet certain hardware conditions. For example: Xiaopeng P7 FCW forward collision warning technical description 1. The system working speed is 30-150km/h for moving targets; 30- for stationary targets Between 85km/h; 2. The system includes 2 different alarm types, divided into pre-alarm and emergency alarm. When a dangerous situation occurs, pre-alarm and emergency alarm are used; the pre-alarm function is triggered first; if the situation continues to deteriorate, an emergency alarm will be issued. In the event of a sudden dangerous situation (for example, a vehicle in front suddenly cuts in or a strong brake), both alarms may be triggered at the same time. 3. Different alarm levels have different alarm methods, including visual alarm, sound alarm and short brake alarm; 4. Through the man-machine interface, customers can turn off or open the FCW forward collision warning function. AEB automatic emergency braking technical description 1. The operating speed of the system is between 4-150 km/h; the system is divided into two functions: EBA emergency braking assist and AEB automatic emergency braking; 2. Driver steering: When the system detects the driver’s intention to change lanes , Will not react or give an alarm to avoid distracting the driver’s attention when changing lanes; 3. The driver’s braking force is insufficient: In this case, the EBA will be triggered to provide the driver with additional braking force; 4. Driving The operator did not respond: In this case, all the alarms that were not triggered before will be triggered, and the system will perform automatic emergency braking (AEB); of course, the active safety item cannot form a complete The car safety system. Especially now that smart cars are becoming more and more popular, passive safety, active safety, battery safety, information safety, and health safety are indispensable… For such cases, I hope that more and more cars can become standard equipment. More people can be protected by such technology.

7 months ago

Of course, the land of China is indeed vast and rich in resources. However, in recent years, the exponential growth of the national car ownership in the domestic market has continued to develop rapidly. There are more cars on the road, “Ghost Probe” is no stranger to everyone. Whether adults or children, people in the blind spot of the driver’s vision suddenly appear, not to mention the driver is shocked, the person who implements it is also shocked. More and more traffic accidents are caused by “ghost probes”, and “ghost probes” are being discussed again and again. The Volvo XC60 on the streets of Suzhou successfully avoided the “ghost probe” of pedestrians and also successfully attracted our attention. It is known that Volvo is known for its safety. I did not expect that there are also two brushes on the “ghost probe”! Children’s Day is coming soon, I wish you a happy holiday! Eat cakes and blow candles~~~~~~ As a big child, I hope that every child can grow up healthily and quickly. As parents of children, we hope that my children can grow up safely and healthily. Childhood is fleeting, and I fully understand the preciousness of childhood, and hope that children can be free and unbridled; as adults, we also know that there are hidden safety hazards behind this unbridled freedom. Especially in recent years, with the complexity of the traffic environment and the increase in vehicle ownership in the market, road traffic has brought more and more safety problems. For example, the “ghost probe” traffic accidents that everyone knows but evade, children are among the high-risk groups. What is a “ghost probe”? “Ghost probe” refers to when there are obstacles on the side of the road while driving or when the vehicles are driving, people suddenly pop out or the blind spot of non-motorized drivers is blocked due to the obstructed vision, and the accident is caused by too late to brake. Compared with children, adults have a stronger sense of traffic, but the accident in Suzhou this time was caused by two adults who were lucky enough not to take the zebra crossing and rush into the road. As for the children, the traffic awareness is not strong. Sometimes a few children chase them on the side of the road. At this time, a car sprang out of the car parked next to him, and a traffic accident occurred. Adults will have a fluke mentality, sometimes to save trouble; while children are weak in traffic awareness, so “ghost probes” are a high incidence of traffic accidents that may occur at any age. Traffic light intersections, bus stop signs, and residential areas with crowded roads are all areas with high incidence of ghost probes. The terrible “ghost probe”, nothing else! There are a lot of traffic accidents about “ghost probes”, and you will find bloody safety accidents when you search the Internet. In March 2021, a 10-year-old boy in Chongqing was near an intersection, less than ten meters from the crosswalk line. In order to cross the road as quickly as possible, he did not choose the crosswalk line, but chose to stop and wait for the vehicle. Passing through the gap, the result was a head-on collision with a slow-moving car in the opposite lane. Fortunately, the speed of the car is not fast, otherwise the result is really hard to think about. But not every “ghost probe” is so lucky. In January 2021, when Xi was driving on the road in Xingfu Village, Jinping Town, Qiubei County, a 5-year-old child playing on the side of the road suddenly crossed the road and was caught by Xi. A 5-year-old child was seriously injured when a vehicle rammed into it. The ghost probe is really “deadly”, undesirable! Imagine how heavy a ghost probe causes serious injuries or even death to children, and what a heavy blow to the children themselves and the family behind them. Safety is no small matter, especially the flowers of the motherland, should be cared for and treated with kindness. In addition to traffic rules and social education, children themselves strengthen their awareness of traffic safety. As the other party that causes ghost probes, they should work harder to prevent this accident. This involves the safety of vehicles. After all, if all cars can’t stop like some brands, no matter how strong a sense of safety is, no matter how well-regulated traffic rules, and no matter how good a driver’s driving skills are, they will not be able to ensure safety. Cars, safe cars. So today’s cars are safe-not a luxury, but a basic requirement. When it comes to safe cars, it is estimated that most people think of Volvo first. As the inventor of car safety technologies such as integrated body and three-point seat belts, Volvo has been at the forefront of car safety settings. In terms of safety settings, although now with the development of automotive technology, various safety measures have been continuously developed. However, it is inseparable from its ancestry, passive safety and active safety. Active safety, prevention first, refers to all safety technologies that enable cars to take proactive measures to avoid accidents. Passive safety refers to safety devices that can minimize personal injury after a traffic accident, including the protection of passengers and pedestrians. With the rapid development of automation and intelligence, the safety of automobiles has also begun to transform into preemptive measures to prevent problems before they occur. For example, the City Safety system used by Volvo. Moreover, all Volvos in China have not reduced the allocation, and the test results are completely reliable for domestic consumers. Whether it is elk, braking, or body structure safety, the XC60 performs well. It is the first AEB test model in the actual test of the car, which astounded the audience.

7 months ago

Volvo is indeed very good, whether it is active safety or hardware quality, it is very good, but I can’t afford it. The main thing I want to say is that this is the passing bus station project that appears in the third typical subject. Judging the distance from the map is not very tricky. Any driver with a little defensive driving experience can stop. In the future, vehicles will become more and more intelligent, will the driver’s level become worse and worse? I’m a little worried.

7 months ago

I knew that Volvo was the safest car in the world. In the early years, a friend spent a huge sum of money to buy two Volvos, but they overturned on the highway. The car broke through the isolation railing and fell to the ground more than 3 meters deep. As a result, the couple was safe. Everyone said that the car was safe, so he sold the crashed car and bought a Volvo. In my impression, this car can protect the owner and is a good car. I was too impressed by the ghost probe’s car accident. May 1, 1998. My first leader left us because of the ghost probe’s car accident. The old leader is smart, humorous, and cheerful. Very knowledgeable. After graduating from high school in the early years, he was assigned to work in a geological survey team, and he traveled all over the mountains and rivers of the motherland. The story of his stomach tells me that he met an old Chinese medicine doctor in Dashan, Guizhou. An 80-year-old man looks at his face, just like a 60-year-old man, the wife of an old Chinese medicine doctor in his 60s, looks younger, and the old Chinese doctor is in him. When his wife was 30 years old, he gave him his own herbal medicine, so they are very young and healthy. Traditional Chinese medicine is really amazing. Every day they explored in the mountains, they found a lot of mineral resources, and some minerals have been mined to play a role for the country. There are many delicacies in the mountains, even leopard meat (the country did not protect wild animals in the 1970s, and the game in the mountains is bought). In 1998, when the unit was restructured, he was exactly 55 years old. According to the policy, he could retreat internally, and the company subsidized him 50,000 yuan (50,000 yuan was a lot of money at the time). He has two children. One daughter is married and gave birth to a lovely niece. The son is in his sophomore year, has fallen in love in the class, and plans to get married after graduation and work. According to the policy, the unit also assigned him a house with one bedroom and one living room. He said his life was perfect. The key point is that after he retired, other units have hired him to take advantage of the residual heat. If you make up the money, you can retire and make money. The son’s marriage room can be solved by the unit, and the son and daughter-in-law have high education. He is very content. But there is really no perfect thing in the world. He allocated a house because of his unit. He drove a moped to buy furniture. The moped crossed the road between the two cars and was hit by a minibus directly. When the ambulance arrived, he had no vital signs. Up. On the night of May 1, I was destined to be unable to sleep. The old leaders who were still chatting together on the 30th turned into icy corpses in an instant. When the corpse was pulled out from the cold storage of the funeral home, there was still blood on his body (we were going to identify the corpse at the time, and we dared not let his wife identify the corpse for fear of accidents). I was trembling, and the colleague next to me vomited directly. How powerful the impact is. Ghost probe, until today, when I heard these words, my heart got confused. If the car was so advanced at that time, my old leader would not have died. At this time, he should enjoy the happiest life. Volvo is really a good car, but it does not say anything to protect pedestrians. It shows that the degree of intelligence of Volvo’s control system is already very advanced. It can protect both pedestrians and passengers in the car. Good car.

7 months ago

This function is always only an assistance. The success rate of different manufacturers is high or low, but they are all less than 100%. Your successful case of publicity is just a failure case that has not been reported. You always need to pay more attention to driving, not with assistance The function is all right. For example, this function corresponding to Tesla is sparse. It is really eye-catching with a good set off.

7 months ago

Driving on the road, there are three things that are most terrifying. The first is a full-load truck, the second is a non-motorized vehicle that invades the lane, and the third is a ghost probe that appears in the blind spot of the field of vision. Large trucks are generally encountered at high speeds and on national highways. If you feel flustered near it, you can directly overtake to confirm that the next lane is safe. After all, large trucks generally drive in the right lane, and the speed will not exceed 100 kilometers per hour. Although a non-motorized vehicle or pedestrian that strays into the motorway will stroll slowly in front of your vehicle, you can also overtake or wait a while to avoid it. The most scary one and the most frequent occurrence is the ghost probe, which is really impossible to guard against. Can you guard against ghost probes like this? Even if you can stop it, you can stop it? Even if there are traffic regulations and traffic police, many people still don’t think that such actions are their main responsibility and depend on the driver. However, with the popularization of driving recorders in recent years, from the past, “cars hitting people” cars must be liable, and the punishments are biased towards people. Now, according to the traffic rules and punishments, it is not partial to any party, which also gives the driver more fairness. At the same time Warn those who do not obey the traffic regulations to obey the traffic regulations. The occurrence of such an accident will bring pain to two families. To avoid this situation, not only rely on the popularization of pedestrian traffic regulation knowledge, but also test the safety configuration requirements of vehicles. AEB emergency braking technology has also been continuously popularized in more models in recent years. Sometimes, you have to admit that the response of machines is much faster than that of humans. AEB is also very useful in preventing ghost probes. There is such an information about the German automobile club ADAC. Analysis of traffic accidents in European countries. If the vehicle is equipped with an emergency braking system, it can reduce pedestrian injuries and deaths by about 50%. In the surrounding roads of the community, the green belt on the right side of the road formed a blind zone. Shorter underage children invaded the lane, and the car owner failed to spot the pedestrian and slowed down and avoided it in time. Just at the very moment, the pedestrian collision warning and emergency braking function of this car intervened in driving and successfully avoided a casualty accident. (Screenshot of car records when the accident occurred) Nowadays, more and more car manufacturers have developed their own active safety systems, such as Mercedes-Benz’s PRE-SAFE PLUS, BMW’s Driver Assistance active safety system, Audi’s Audi pre sense system. But active safety is not a panacea, and it cannot achieve a 100% success rate. In a third-party test, the Mercedes-Benz E-Class could not effectively brake the ghost probe at a speed of 60km/h. The most well-known active safety system that also played a role in the above accident is Volvo’s City Safety (city safety system). With the support of this system, it can still be effective against ghost probes at a speed of 60km/h.

7 months ago

When Tesla’s negatives kept going, I was thinking about which company’s positive news would be reported later, but now it’s finally time to wait. I wrote a long time ago that Baidu’s driverless technology will become mainstream for some time to come. When I saw Baidu’s cooperation with Geely, I guessed that there was an expert connection behind it. In the long run, the pragmatic style of Geely’s private enterprises and the strength equivalent to the background of state-owned enterprises ensure that he can occupy half of the car companies. Buy stocks, buy auspiciousness, good luck.

7 months ago

S90, I have experienced automatic braking a few times, and I still feel safe. I know that the car is also helping me to keep an eye on the road, especially when the road is dark, and I feel safer. But there are also times when I am engaged in an oolong, a bridge that I pass through every day when I go to and from get off work, and once in the past, I suddenly rang the alarm, but there was no automatic brake. Later I recalled that there might be an obstacle such as rubbish on the road. Overall, the experience was good. of

7 months ago

I just met the ghost probe two days ago and now I write that I still have lingering fears. One day I drove out of the gate of the community. I had already noticed an electric car on the right. When I saw him driving on the right, I thought he was going to turn right. There was another car parked in the middle of the road blocking the view. After seeing him enter the blind spot, I hit the brake and slowed down. I didn’t expect to come out of the blind spot. At that moment, the electric car turned left! Just come to the front of my car! I was so frightened that I hurriedly braked and turned the direction, but didn’t hit it. In hindsight, fortunately, I was still sober at the time. After seeing the electric car, I paid attention to the brakes. If I didn’t slow down, it would have been an accident. Not only did I drive by myself, but I also ran into other people’s cars a few times. Sometimes I was more nervous than the driver when I was sitting in the co-driver. There are many motorcycles and electric vehicles on the road, and many people who do not follow the traffic rules. Every time, I worry about being afraid for a long time. I drove the ideal One at home that day. There was no emergency braking when the electric car rushed into my face. I don’t know if it was because I stepped on the brake and turned the direction, or the emergency braking is only activated when the rear-end collision is about to happen. Anyway, since then, I have put a question mark on the effectiveness of the ideal emergency braking. The AEB (emergency braking) system that most vehicles currently on the market will be equipped with should be the best system to effectively avoid things like ghost probes. Analyze and judge the road surface information through the driving camera and on-board radar, and intervene in driving when necessary to prevent accidents. Whether AEB is good or not depends on whether the camera and the system algorithm are good. Obviously the ideal one’s AEB is not ideal. Moreover, there is a gap in the AEB performance of each vehicle. The effective absolute speed of AEB calibrated for most vehicles on the market is below 60km/h, and the actual use of each vehicle will also affect the probability of successful AEB intervention. That day, the 50km/h entrance of the community failed to intervene. If you change to another car at home, this problem shouldn’t happen. I bought the S90 for my dad two years ago. Why did I choose to buy this for my retired dad at that time? It was for safety. The emergency braking target on the S90 is also 60km/h, and it is a relative speed limit. What do you mean? Many cars now say that their absolute speed can trigger emergency braking at 45-60km/h. The absolute speed is easy to understand that your car will trigger the brake within this prescribed speed, but the relative speed is like your car is mine. In front of the car, your car is driving at 60 kilometers per hour, and my car is behind your car, and my driving speed is 90 kilometers per hour. In this case, the speed difference between our two cars is 30 kilometers, which means that as long as The speed difference, within 60 kilometers, I can avoid a collision. More directly, Volvo has no speed limit (no absolute speed limit) in collision avoidance with other vehicles. Volvo’s AEB provides basic data for the system based on twenty high-precision cameras and sensors on the vehicle. Each sensor has a clear division of labor, like twenty eyes, which provides a panoramic view of road data. The first to appear is the front monocular camera and the panoramic camera. The front monocular camera recognizes a sector area of ​​100° in front. The four panoramic cameras bring obstacle recognition around the vehicle, lane lines, and parking space recognition. The main function of AEB is the front monocular camera, which is used to recognize the real-time road surface information in front of the vehicle and transmit it back to the trip computer. The trip computer uses the information data to determine whether the safety function needs to be activated while driving. The second appearance is the millimeter wave radar, which is installed in the front and rear of the vehicle. The 77GHz millimeter-wave radar can detect cars/electric cars/bicycles/pedestrians on the road, track road information uninterruptedly, and measure the distance between the vehicle and the object in real time. The radar continuously scans and tracks the movement of objects on the road. Once an imminent danger is discovered and the driver does not respond in time, AEB will automatically intervene to stop the vehicle, thereby reducing the risk of accidents. Friends who are concerned about intelligent driving may ask, why not use lidar? In terms of technology, the current lidar is a relatively advanced technology. The working principle of lidar is based on the laser as the signal source. The pulsed laser emitted by the laser hits the trees, roads, bridges and buildings on the ground. As a result of scattering, a part of the light waves will be reflected to the receiver of the lidar. According to the principle of laser ranging, the distance from the lidar to the target point can be obtained. The millimeter wave radar is FMCW (Frequency Modulated Continuous Wave), and the transmitted electromagnetic wave signal is blocked by objects on its transmission path and then reflected. By capturing the reflected signal, the radar system can determine the distance, speed and angle of the object. The principle is to detect data through reflection and other means, but in the current urban environment, Lidar is more susceptible to interference, which in turn affects stability. For example, under extreme weather such as heavy rain and heavy snow, it will affect the collection of lidar information, thereby affecting the rendering of the road scene; and the lidar is blocked by dirt, which will also affect the accuracy of judgment. The third is the ultrasonic radar mounted on the front and back of the vehicle, which is mainly used to detect obstacles at close range and is often used when parking and passing through narrow roads. When the ultrasonic radar detects that the gap between the vehicle and the obstacle is too small, it will transmit the information back to the trip computer to remind the driver. Looking at it this way, there are still car companies that can make safe and effective AEBs, but Volvo can see that they can meet high standards. What I admire most is that Volvo’s safety system is standard, not Take him out alone as a selling point. In my impression, the ABS anti-lock braking system and the ESP vehicle stability system are also equipped one by one, and finally become the standard equipment of the vehicle, in order to ensure the safety of the driver while driving. However, functions such as AEB to prevent ghost probes and pedestrian safety have not been fully popularized. In addition to the safety care, there is another layer of logic behind the exemption clauses whether to achieve the standard configuration of the whole system. There are some car features that require extra money to install. You have to install software like a mobile phone. You have to choose a lot. It can be installed only if the OEM agrees to it, that is, the OEM has avoided or evaded a lot of such responsibilities, and Volvo’s models may be equipped with exemption clauses to avoid the legal risk of functional failure when they leave the factory, which also proves Volvo’s confidence in its own technology.

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