![]() ![]() There are also accelerometers in the chest, pelvis, legs, feet and other parts of the body.Ī graph of the head acceleration during a crash test Inside the dummy's head, there is an accelerometer that measures the acceleration in all three directions (fore-aft, up-down, left-right). The crash-test dummy has accelerometers all over it. But, if you bang your head into a pillow, the speed of your head changes more slowly as the pillow crushes (and it doesn't hurt!). For example, if you bang your head into a brick wall, the speed of your head changes very quickly (which can hurt!). Acceleration is the rate at which speed changes. ![]() This data can be used to determine the probability of injury. These devices measure the acceleration in a particular direction. ![]() The dummies contain three types of instrumentation: It weighs 170 lbs (77 kg) and is 70 inches (5 ft 10 inches or 1.78 m) tall. This is the dummy most commonly used in crash testing. For example, the fiftieth-percentile male dummy represents the median sized male - it is bigger than half the male population and smaller than the other half. The dummies come in different sizes (click here to see some of the dummies), and they are referred to by percentile and gender. ![]() For example, it has a spine made from alternating layers of metal discs and rubber pads. A dummy is built from materials that mimic the physiology of the human body. The dummy's job is to simulate a human being during a crash, while collecting data that would not be possible to collect from a human occupant.Īll frontal crash tests in the United States are conducted using the same type of dummy, the Hybrid III dummy. ![]()
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