Mega 120 mph Crash! - Fifth Gear
В The labor model is to simulate a human being in an accident, while the collection of data that would not be possible to collect a human occupant.
All frontal crash tests in the US are performed using the same type of model, the Hybrid III dummy This ensures consistent results A model is constructed from materials that mimic the physiology of the human body, for example, it has a backbone made from alternating layers of metal plates and rubber buffers.
The models are available in different sizes, click here to see some of the models, and they are appointed by percentile and gender for example, the male model fiftieth percentile represents the median size male - it is larger than half the male population and less than the other half is the test This model most commonly used in the crash It weighs 77 kg 170 lbs and is 70 inches 5 feet 10 inches or 1 78 m high.
The models contain three types of instruments.
Accelerometers These devices measure the acceleration in a particular direction These data can be used to determine the likelihood of injury is accelerating the rate at which gear changes For example, if you hit your head into a brick wall, speed your head is changing very quickly, which can hurt But if you hit your head in a pillow, the speed of your head changes more slowly than the pillow crashes and it doesn t hurt.
The crash-test dummy has accelerometers all over the inside of the dummy's head, there is an accelerometer that measures acceleration in three directions front to back, top to bottom, left to right there as accelerometers in the chest, pelvis, legs, feet and other body parts.
A graph of the acceleration of the head during a crash test.
The above chart shows the acceleration of the driver's head during a frontal collision Reviews 56 3 kph 35,000 at the present time is not a fixed value but will fluctuate up and down during the crushing This reflects how the head slows down in a collision, with the highest values coming when the head hits hard objects or the airbag.
inside the dummy load cells are load cells that measure the amount of force on different body parts in a collision.
Photo courtesy NHTSA graphic of force in the femur of the driver during a collision.
The above graph shows the force in Newtons in the femur of the driver the thigh bone, in a frontal collision of 35 mph The maximum load in the bone can be used to determine the likelihood of rupture.
Movement Sensors These sensors are used in the chest skin They measure how much the chest flexes in an accident.
Photo courtesy NHTSA The deviation of the chest during a frontal impact at 35 mph.
The above analysis shows the chest deflection of the driver during an accident in this particular accident, the driver's chest is compressed about 2 inches 46mm This injury would be painful, but probably not fatal.
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