— Test angles and impact locations
Before a MIPS BPS-enabled helmet can reach the market, it is first tested at our Swedish test lab to ensure that it meets our stringent requirements for approval.
In the approval test, we drop the helmet vertically onto a sandpaper-covered impact plate, set at 45 degrees. This test relies on statistically-proven real-world accident scenarios.
We base the testing angle on two facts. First, 45 degrees seems to be the most common impact angle in bike accidents. When it comes to Moto, the impact angle is usually higher. However, at 45 degrees, the rotational protective properties of the helmet are under the most stress. Therefore, we set an impact angle of 45 degrees for all of our approval tests.
The test impact speed is 6.2m/s for bike, EQ and snow helmets. For Moto and MX helmets we use an impact speed of 7.5m/s.
We test the helmet in three areas, based on both real accident data and evaluation of the most common impact points. And we select the impact direction for each point to result in rotation around all three anatomical axis X, Y and Z.
The human head is more sensitive to rotation around the X (rear-to-front) and Z (vertical) Axis compared to rotation around the Y-axis (ear-to-ear).
MIPS BPS is an omnidirectional system, developed to reduce rotation around all axis. However, the MIPS BPS function can vary for different impact locations due to the shape of the head and the initial design of the helmet.