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    Revolutionary Changes In The Protection Testing Industry

    2014/6/26 8:11:00 35

    ProtectionTesting IndustryChange

    < p > recently, the SHLJ-LSIT-01 type low speed impact tester developed by Shanghai University of Engineering Science and Laizhou Electronic Instrument Co., Ltd. has been developed and debugged successfully. The emergence of the device has brought about a revolutionary change in concept for trial production and testing of protective materials.

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    < p > > a href= "http://www.91se91.com/news/index_c.asp" > SHLJ-LSIT-01 < /a > low speed impact tester consists of three parts: impact part emission part, parameter detection and analysis part and flow control part. Its parameter detection and analysis part is the core innovation content of the device.

    The parameters are obtained through two channels. One channel is an acceleration sensor impacting on the body. Through this channel, the acceleration value of the impact point of the sample can be obtained, that is, the feeling of "fist", and the other channel is the impact sensor array placed on the other side of the impact point of the detected sample.

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    < p > the maximum impact velocity of the device is 25 m / sec (which can be increased according to user demand). The maximum impact acceleration is 20 kg. The sampling frequency of the data acquisition instrument is 1 mg/ / MP, and the number of impact sensor array at the sample stage is 6 (which can be increased or reduced according to the needs of users). The configuration basically meets the research requirements of the performance testing and characterization of impact protection materials.

    < /p >


    < p > take an acrobatic performance as an example. The performer uses a big hammer to hit the abdomen of another performer. If struck directly, the reaction force of the hammer may not be large, and the abdomen is seriously injured. There is no doubt that a big stone slab above the abdomen may be the opposite. The hammer has a great reaction force and the batter may be unharmed.

    < /p >


    < p > SHLJ-LSIT-01 type low speed < a href= > http://www.91se91.com/news/index_c.asp > shock tester < /a > has changed the previous detection concepts and methods.

    Through this device, the research and testing personnel can not only understand the stress state of the material at the impact point, but also know how much residual impact force passes through the protective material to the protected object, in other words, it can truly master the detected "a href=" http:// www.91se91.com/news/index_c.asp > protective material < /a > real protective performance.

    This is especially important for composite and composite protective materials, because the homogeneous protective material is simple, and the material state of the striking point can roughly reflect the state of the other side of the striking point. However, the composite composite heterogeneous material is often composed of two rigid and flexible materials. The initial diffusion of the impact force can be greatly improved by rigid flexible alternation (the impact energy can be quickly and effectively spread on the surface of the striking point to reduce the impact pressure of the protected object) and the impact energy dissipation capacity of the penetrator, so that the isolating impulse can be maximized.

    As a result, the acceleration value of the hitting point basically can not reflect the real performance of the whole protection and shock isolation system, and the shock sensor array placed on the other side of the impact point of the detected sample can achieve the purpose of obtaining the true isolation characteristics of the protective material.

    < /p >

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