Test results that speak for themselves
In normal regulation tests used to certify motorcycle, equestrian, bicycle or ski helmets, an aluminium dummy head is placed inside the helmet and the helmet is dropped vertically onto a surface. The vertical impact results in a radial force to the head.
Deformation of the brain from an oblique impact when the user is wearing a conventional helmet and a helmet with MIPS technology. Finite element model (LSDYNA) of the human head showing the maximum principal strain in the sagittal plane (Kleiven et al. 2003). Software: LSDYNA by courtesy of ERAB, Sweden.
A helmet with the MIPS technology is much safer than the conventional helmets used on the market. 15 years of development and experimental tests have been performed to compare the helmet with MIPS technology to a con¬ventional helmet. The results showed that it was possible to reduce the forces to the brain by up to 40% at an impact angle of 45 degrees by adding the MIPS technology. It has also been shown that helmets with MIPS technology perform well in the standard regulation test used to¬day. The combination of the brain's own design and the groundbreaking MIPS technology ensures maximum protection. Very simple and very effective.
Oblique impact test
A Hybrid III dummy head (specially designed to measure the complex forces that occur in the head) is fixed in a helmet, which is placed on a frame. The frame is attached to two pillars and can travel almost without friction in a vertical direction. The hel¬met strikes a plate, which is moving horizontally on two PTF-covered rails. The plate is accelerated by a pneumatic cylinder. A system of nine accelerometers is mounted inside the head. With this method it is possible to measure both linear accelerations in all directions and rotational accelerations around all axes. Both plastic and glass fibre full-face MC helmets as well as other sports helmets have been tested in the oblique test rig. The linear acceleration is also reduced with the MIPS technology. A more detailed description of the test rig is given in the doctoral thesises by Halldin 2001 and Aare 2003.
Examples of the protective properties are shown in this figure showing a 40% reduction in the rotational acceleration.
The following films (mpeg, wma, avi) show the oblique test in our specially constructed test rig. And two clips where a ball illustrates the difference of a headon and an oblique impact. The clips opens in a new window.