Crash test dummies are dolls that simulate the effects of a car accident on the human body and are life-size. crash test dummies are equipped with load sensors that measure the impact of the crash test. Different crash test dummies simulate the bodies of men and women as well as children, who all have their own height and body weight.
At the end of each crash test, professional engineers will give the crash vehicle a score. The reference basis for scoring, in addition to the assessment of the damage to the vehicle, but also to the car "personnel" injury assessment, at this point, that is the role of the crash test dummies.
Crash test crash test dummies are based on a large number of cadaver test research (this is also the crash test crash test dummies research and development cycle is long, one of the reasons for the high price), crash test dummies are mostly made of metal and plastic, the chest cavity is made of steel, the shoulder blade is made of aluminum, the pelvis is made of plastic. The cost is up to about $ 40,000, if coupled with the sensor supporting equipment, the cost is up to $ 60,000 to $ 70,000.
In the early car crash test, the staff will personally participate in the test, but because the risk factor is too high, considering the safety of the testers' lives, and then choose chimpanzees and other animals instead of humans to carry out crash tests, but was opposed by the Animal Protection Association and animal lovers, and then this arduous task was replaced by crash test dummies to complete.
It is worth mentioning that the purpose of the crash test is to collect data, not only the car system, which also includes the impact of the collision on the human body inside the car. Through the automotive crash test, the study of the driver and occupants in a controlled as well as non-measurable environment in a crash force, and these data will be provided by the crash test dummies.
Take Hydrid III 50% crash test dummies as an example, the crash test dummies consist of head, neck, chest, upper extremity, hip, lower extremity, foot and various forms of connecting mechanism, containing nearly 400 parts and about 60 sensors. The sensors include: acceleration, angle and velocity, force, moment and displacement sensors, etc., which are used to measure the damage of each part in the crash.