Impact dummy skin and preparation technology

Abstract

The invention relates to an impact dummy skin and a preparation technology, and belongs to the field of safety detection of automobiles. The material of the dummy skin shall be designed with the softness and hardness degree that the elasticity of the dummy skin can be simulated, and certain strength (for resisting multiple types of impacts and shocks) can be reached. The preparation technology shall have the advantages that the technology is simple, the implementing is easy, and the cost is low. Two types of macromolecular materials, such as universal PVC (polyvinyl chloride) with low cost, and TPU (thermoplastic polyurethane) with good toughness, are used as the raw materials, and are physically mixed according to a ratio. The preparation technology comprises the following steps of enabling a double-rotor mixer to heat, and mixing at certain ration speed and determined mixing time; after mixing, enabling a tableting machine to tablet the skin material with certain thickness. The toughness of the prepared finished product of skin is different along with the different content of TPU, so that the different requirements of impact test can be met. The skin product has the advantages that the skin product can be used for multiple times of impact test of automobiles, and the other side of the skin can accurately receive the information of injury to a human body by impact waves.

Description

technical field [0001] The invention relates to the field of automobile safety detection, in particular to a collision dummy skin and a preparation process. For dummy skin requiring multiple test conditions and multiple uses. Background technique [0002] With the development of industrialization of human society, cars of different models and functions have gradually become a part of public life. The advent of a car, the most concerned is its safety performance, as an important test equipment for car safety testing - collision dummy, more and more used in the field of car safety. Compared with real people, the biological fitting, accuracy and repeatability of the working state of the crash dummy are important indicators to consider the performance of a crash dummy. As the first line of defense of the crash dummy, the dummy skin plays a vital role in the crash test process. At present, domestic and foreign studies on the preparation of dummy skin do not pay much attention,...

AI Technical Summary

Problems solved by technology

However, the above two methods have the problem that the thickness and uniformity are difficult to guarantee.

At the same time, the difficulty of replacement is also a big challenge

[0003] At present, the skins of collision dummies used by major automobile manufacturers mostly avoid the problem of frequency of use, that is, after a small number of collisions, the skin is damaged, and the steps of skin replacement are cumbersome and time-consuming, which brings great inconvenience to production and testing.

In addition to the frequency of use, the filterability of the skin layer of the current universal dummy against impact needs to be improved

Its cushioning performance is higher than that of real human skin, and its high absorption capacity for impact will affect the work and testing of sensitive components or sensors inside the dummy, and will also have a great impact on the test results, which in turn will affect the developers' estimation of the safety performance of the car judge