material life is now increasingly high degree of urbanization more and more developed, but traffic accidents have taken place every year. According to World Health Organization statistics, in 2019, 18 million children die from road accidents, the cause of which is associated with a third car accident the safety of children, and this proportion rise.
children riding accident rate is so high, the primary reason is insufficient protection. For example, China’s child mortality rate due to traffic accidents, it is twice as high for Euro American countries. The reason is that although my country is a child safety seat in the producing countries, but more than 70 percent seats are exported overseas, domestic usage only single digits, well below the United States and Europe.
but only to enhance the protection awareness is clearly not enough. Like cook with good ingredients to make delicious, increased accident rate, safety and child protection technology is not mature enough to cut corners even have a great relationship.
Beware of traditional security techniques to cut corners
we say children of traditional security, the most important is a child seat, power windows and child safety lock three, especially the first two, safety and quality issues quite common.
1) child safety seat
due to a collision, designed for adults safety seats or airbags can not play a role in the protection of children, so Volvo as early as in the 1960s developed the first child safety seat, use of child seats can greatly reduce the risk of traffic accident injuries.
infant’s head is very heavy, but the cervical spine and abdomen and is very fragile and can not withstand the impact of a positive inertia force, reverse mounting the seat, the seat back can be better and better protection buffer supporting the head, neck, play.
With the improvement of laws and regulations, child safety seat has been defined as a national compulsory 3C certification of products, but the quality of child seats on the market varies greatly, and can not people completely at ease.
315 party last year on the exposure of a number of substandard quality of the child seat, the failure rate has reached 20 percentage. These products will be named, mainly dynamic crash tests and burning test does not meet the regulatory requirements.
took a dynamic crash test, the test is the main seat body and restraint systems protection performance under the impact of the state, if the child seat restraint is not strong enough, ranging from hit the front seats, while suddenly fly out, so the impact on the children and is fatal. When
The child safety seat for dynamic crash test, the impact speed of 50km / h, the child safety seat dummy head the amount of displacement required not more than 550 mm, in order to avoid the danger of collision.
While it is possible to improve this problem by child safety air bags, but because the cost is limited, the technology usage is very low. Until 2018 elderly suitable safety seat can only company released the world’s first child car seat airbags, and a small amount of supply in the UK market.
instantaneous collision, the chest and the shoulder of the child series of small deployment of the airbag 50 can reduce the percentage of children head and neck of force.
on the technical conditions of the moment, we have to focus on is the ability to fix child seat.
At present, fixing means fixing a car safety belt, ISOFIX interfaces and fixed latch fixed interfaces. ISOFIX mounting operation is relatively simple, just to the child seat is inserted along the guide groove is aligned with the ISOFIX connector toIt can greatly reduce the risk of incorrect installation, and therefore more popular with consumers.
ISOFIX connector interfaces are rigid, whether the brakes will not be excess or bumpy shaking, better ride comfort .
but we still have to pay attention, ISOFIX interface is a load-bearing upper limit of the normal limit is 20kg. If the child’s weight exceeds the weight of the seat + ISOFIX bearing interface, the interface will ISOFIX risk of fracture.
In order to ensure the safe use of the child seat, the seat manufacturer States must meet the requirements of the national standard ISO-FIX fixed point strength. But GB only barriers to entry, the manufacturers want the insurance, must be done several times the value specified for the job.
ISO-FIX fixed point strength test by loading a static device, load is applied to the front and side, front to simulate and when a side collision, to verify that the stent has sufficient fixing strength to the child seat secured to the seat.
like the BMW had multiple issues recall for child safety seats, because insufficient welding strength between the ISOFIX Interface U-bracket fixed to its bottom, deformation may occur and the risk of breakage.
2) pinch window
Now the window is substantially electrically control the movements of the control, when the window is blocked by the foreign matter rising process, stall force of the motor can reach 200 ~ 300N, corresponding to the weight of the bag of rice, for children, the risk of entrapment is liable to occur.
In order to avoid the emergence of child crush accident, a lot of new models in the power window control system in the anti-pinch function and configuration as a child safety selling point publicity.
However, despite the good pinch function, but because the electronic control system instability mature, Hall sensor signals incorrectly are also many complaints occurred during the recognition process, usually pay more attention German cars will find that the complaint rate is relatively high (probably with the latest vehicle of German cars and most have four anti-pinch windows function).
Characteristics of the pinch window glass object encountered during the barrier rises, the motor will slow down or stall, Hall sensor output signal will rise above the normal range, the anti-pinch module identification signal change, the steering motor is switched, so that the window pane immediately decreases in the end, to release the insert.
Black & enhance proactive security capabilities
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traditional security technologies are basically passive safety, that is, post-processing. AEB than a car collision has enough active brake active safety technology such protection, child protection should also have added intelligence to really step into “comprehensive security.” Engineers did in fact moving in this direction, such as children were locked inside the car alarm system technology is worth the wait.
every year to see the fire brigade emergency dispatch broken window to rescue children trapped inside news, summer, if the child was locked in the car for a long time, sultry the environment will make child dehydration and difficulty breathing or even lead to suffocation.
In order to prevent such accidents, there are mainly two kinds of technical solutions, one is integrated in the child seat detecting system, the other is in the car children’s detection system is installed.
such as intelligent networking Babyfirst car safety seats for children, Mercedes-Benz PRE-SAFE child safety seat is the technological upgrading in the traditional child seat. By sensors on the integrated child seat can identify whether a child is forgotten in the car, and there may be with the phone APP interconnected,Timely warning of the risk of an abnormal situation to parents.
But because the child safety seat penetration rate is not high enough, and the supply of spare parts needed to promote the business, the difficulty will be relatively large, installed in the vehicle detection system for children has become a mainstream solution.
vital signs monitoring technology such as the Great Wall, you can lock the car after 30 seconds, the automatic rear radar scan test, found that children were trapped in the car, it will alarm. Recently, Tesla also announced that is developing a new type of radar sensors, this technology can reduce children’s risk of overheating the car due to heat stroke and even death.
wave radar, is working in the millimeter wave band radar detection. To collect the vital signs of a non-contact manner, the identification can distinguish between a small target, the target can be obtained and a clear outline image detail features, to distinguish between adults and children.
compared to the millimeter-wave radar, in fact, there is a relatively low price of these ultrasonic inspection method, but I would come into contact with a product called “Children Call Host” the products, the ability to identify it to be improved.
For example, in the vital signs detection, if there is the fluctuation around the gas stream (such as windows, windy) affect the test results, and the test space without vibrations, also resulting in abnormal alarm, so when the earthquake happened, it detects not working.
This figure is doing children call host function to verify a low temperature environment, because the environment box in the wind, it will affect the test result. Therefore the test, using cardboard boxes to simulate a closed environment, blocking airflow.
So I still look forward to the performance of millimeter-wave radar, Great Wall Motor vital signs monitoring technology will be starting in 2021 under WEY VV6, toTime tracking reports will give you experience.
Of course, in addition to the problem of children being locked inside the car, we usually more troubled children is probably not observed in the back seat. Now, some high-end cars very close monitoring in children’s use of video systems, real-time images back in the control panel display, you can always see the back of the child’s every move, parents do not indecisive in driving the process, peace of mind driving.
This technology is by car camera will put in the back of the space images on the control screen, to avoid the driver’s “back “hidden.
AL channel Summary
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now increasingly difficult to raise a child, child safety no small matter, you can be sure to not be taken lightly. The bright side, now has a lot of passive safety technology to protect us, we have to do is to find good quality products to enhance their use of safety awareness. But security technology unlimited, especially in this active safety, the enterprises still have to put together the effort to see you up.