1 Introduction This article refers to the address: http:// The goal of vehicle crash safety research is to minimize the consequences of traffic accidents. The well-designed car can ensure the living space of the person on the one hand in the event of a collision accident, and on the other hand, the load generated on the occupant is limited to the range that the human body can bear by means of the restraint system of the automobile. The collision safety of a car is basically determined by the following two factors: · Deformation characteristics of a car collision (deceleration of the car, living space of the occupant, etc.) ·In-car restraint system (belt, airbag, etc.) 2. Airbag control In the event of a car crash, because of the very short duration (usually tens of milliseconds), the car's restraint system (such as three-point seat belts, seat belt retractors, airbags, etc.) must be well matched to best protect passengers. . This requires the restraint system to be able to quickly identify the collision and quickly determine if and when to explode the airbag or seat belt retractor (if any). Some of the early car airbag controllers were mounted on the steering column, so although the cost was lower, the acceleration here was unstable, and it was difficult to accurately control whether and when the airbag detonated. Most modern airbags are controlled by an ignition trigger controller mounted on the central passage of the vehicle. Today's controllers generally monitor the acceleration variable at the central channel of the car in real time, and compare it with the pre-set trigger threshold signal after filtering and integrating to determine the point of the airbag when the traffic accident occurs. The collision response characteristics of the car's central passage greatly influence the collision safety of the car. Designing an excellent car (mainly the body) will make the collision sensing very reliable and very easy. The whole process of airbag burst at the time of the accident consists of signal transmission, sensor response analysis, and airbag gas generator igniting. However, the detonation control of automobile airbags in the world today generally only considers the situation of the car itself in the event of a collision accident and does not take into account the passengers sitting in the car. 3. The danger of airbags There is no doubt that the airbag system has improved the collision safety of the car very well, and it fully exerts the protection effect for people together with the seat belt. However, in the OoP state ("Out of Position"), the airbag can also cause injury or death to people, such as: ·Because the sensing system of the airbag does not fully consider the actual situation of the accident, the airbag is ignited and detonated later. · The passenger squats on the steering wheel or dashboard of the airbag due to panic or the like, or the seat is adjusted too far forward, or the passenger leans forward because the seat belt is loose or even without a seat belt causing emergency braking. · Did not notice the warning on the car, fixing the baby's seat head forward to the front passenger position Under the above circumstances, when the airbag bursts, it is easy to cause harm to people. To solve this problem, it is necessary to improve the existing collision sensor recognition system. On the one hand, the airbag can provide the passenger's collision safety protection in the "standard position" on the one hand, and the airbag can not be detonated on the other hand. Or reduce the pressure of the airbag when it explodes to reduce the damage that the passenger may cause when deviating from the normal seating position. 4. Developing airbag technology The US regulations (FMVSS, Federal Motor Vehicle Safety Standards) strongly influence the development of vehicle collision safety. The new US FMVSS208 regulations, which began to be implemented three years later, will place higher demands on airbags, making it truly "safe" without causing injury to occupants in the car for accidental reasons. The regulation will require a new generation of airbags to not only take into account the different situations of various collisions, but also the passengers' conditions (such as passenger size, sitting posture, etc.). The new FMVSS208 regulations in the United States mainly focus on two goals: · Further improve the protection of the car collision safety system · Avoid the dangers of safety systems The airbag test under these circumstances will be proposed for the above two regulations. At present, major foreign automobile companies are stepping up their development work in this area, continuously improving the passive safety of automobiles, continuously improving the airbag module for the requirements of automobile airbags in the OoP state of the occupant, and developing and detecting the occupant sitting in the vehicle. The state of the detection system has made great progress. 5. Conclusion It is conceivable that a more perfect car crash safety system in the future should: · Have better ability to identify traffic accidents and accurately identify the severity of the accident · Has a sensing system in the occupant's room, and it not only can be statically recognized, but also can dynamically sense the seating position, as well as passenger size and weight, etc. · Can change the pressure of the airbag explosion by, for example, using a multi-stage airbag gas generator or an adjustable airbag exhaust device · Can change the limit force of the seat belt limiter according to the requirements, better play the effectiveness of the seat belt in traffic accidents, and better protect the occupants in the vehicle together with the airbag system. In addition to reliability, fuel consumption and comfort, the safety of today's automobiles has attracted more and more attention. The passive safety restraint system and its control of automobiles have been continuously innovated under the principles of practicality and economy. Information that affects the vehicle's passive safety system should be reflected in the controller and can be made through the controller to achieve the best protection for passengers. High Purity Copper Clad Copper,Copper Clad Copper Bare Copper Wire,Double Layer Bare Copper Wire ,Electroplated Copper Clad Copper Core Wire changzhou yuzisenhan electronic co.,ltd , https://www.ccs-yzsh.com