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Child safety seat collision test method
1. my country’s child safety seats need to undergo a crash test before they are marketed. At present, child safety seats produced in my country need to pass a crash test to determine whether they meet the safety standards in the 'Child Occupant Restraint System for Motor VehiclesWhen consumers buy child safety seats, they should choose branded products that pass this standard to protect children's driving safety. That is to say, only child safety seats that meet the standards of the 'Child Occupant Restraint System for Motor Vehicles' can be sold on the market. 2. What is the basis for the collision test of child safety seats? Yu Feng, deputy director of the Passive Safety Testing Technology Institute of Shanghai National Motor Vehicle Product Quality Supervision and Inspection Center, pointed out that when child safety seats are undergoing dynamic collision tests, the head of the seat should be Values u200bu200bsuch as displacement, chest acceleration, and abdominal invasion are clearly required to ensure the safety seat's protective effect on children. In the crash test, a 3-year-old dummy of 15kg was used, and the speed at the time of collision was 50km (when the car suddenly collided or braked at a speed of 50km/h while driving, the objects in the car would produce 30-40 times its own weight. Impact force. If the baby is 15kg, the impact force generated during the collision will be 450-600kg). According to the standard, when encountering a frontal collision, the displacement of the dummy's head on the child safety seat cannot exceed 550 mm. The experiment seems complicated, but in fact, everyone only needs to focus on a few data. 1. The 3ms cumulative value of the synthetic acceleration of the dummy's chest, regardless of the complexity of the name, just remember that if this value is greater than the value specified by the law, the human body may become unbearable. 2. Dummy head displacement, this displacement law also clearly stipulates the limit, if it exceeds, there is a danger of collision. 3. Experimental environment and tools 1. Introduction to the experimental site The destination of this trip is the key laboratory of the China Automotive Technology Research Center. This laboratory can achieve multi-angle crash tests at different speeds of vehicle-to-vehicle, and more realistically simulate actual road traffic Accident, and multi-angle car-to-car crash test can be carried out. It is currently one of the most advanced automobile safety test laboratories in the world. 2. Introduction to the experimental tools 4. Experimental process 1. Installing the car seat The first step in the experiment is to install the car seat. The picture above shows the crash test room engineer fixing the 'car seat' on the crash test bench. Don't underestimate the fixing of the 'car seatThe above picture shows the final proofreading of the seat installation by the test engineer using the laser alignment instrument to ensure the accuracy of the experimental data. 2. Install the child safety seat After installing the car seat, the engineer fixes the child safety seat on the car seat very carefully. The child safety seat is installed. The wooden tool above is to make the dummy's back and the actual child have a certain gap between the seat. 3. Installing the dummy. Someone asked if the dummy was transported by such a large truck? ! The answer is yes, because the dummy is a high-precision instrument. Regardless of his ordinary appearance, his core is quite powerful. The market price of such a child dummy is also around 200,000. Just watch the engineer carry the dummy to know how heavy the stuff is. The weight of the dummy and the child of the same size can be the same. Engineers are linking the collision test data line to the dummy to test the dummy's head displacement, chest pressure and other data. 4. Confirm that the safety seat and the dummy are successfully installed. The engineer installs the dummy on the child safety seat and confirms that the dummy is installed successfully through appearance correction and observation of electronic equipment. 5. Test the opening force of the seat belt. The tester confirms the opening force of the seat belt. This link is essential. If it is higher than the standard, the seat is problematic. 6. The formal crash test experiment officially started. The entire crash process was very short. The testers used the crash instrument to simulate the collision of the vehicle at a speed of 50 km/h from the front. After the collision, the tester checks whether the various data obtained after the collision with the safety seat simulator is installed are in compliance with the corresponding national standards (that is, whether the test data is within the range of the several key data reference indicators introduced earlier) , And then make corresponding conclusions. So far, this experiment has been successfully completed. More about automotive interior tester: http://www.standard-groups.com/MaterialofAutomotive/
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