The 3D laser scanning Instead of designing helmets around the outer shell, the AGV STANDARDS start with the rider's head, which is measured digitally using laser scanning technology.
Three-dimensional scanning is a highly-precise technology (to a tenth of a millimetre) that allows one to convert anthropomorphic shapes into digital data and then carry out accurate research on the human physiognomy. This research then becomes the starting point for designing the parts of the helmet which are in contact with the face.
Accurate 3D research into the shape of the face has enabled us to design helmet inner shells and linings in ways never achieved before to obtain a comfort lining that is optimised for different roles, with different foam densities to maintain the aerodynamic position of the helmet, breathable fabrics and anatomical geometries.
Combining ergonomic research with measurements of rider posture has allowed us to design the helmet components and visor opening to achieve the fullest field of view toward the horizon.
Having a mathematical model of the helmet in all its parts allows us to perform Finite Elements Method (FEM) analyses which provide computer simulations of a series of crash tests reproducing not only the official approved standards, but the more demanding AGV standards as well. The FEM analysis and its results show whether the helmet structure needs to be modified to achieve the performance required by the AGV Standards. This procedure allows a helmet to undergo a much greater variety of tests many more times than is possible with "real-world" tests because it doesn't involve the destruction of the shell tested.
The protection capacity criteria specified by the new standards are:
m/s2 Acceleration.
HIC = Head Injury Criterion: brain trauma risk related to acceleration.
Rad/s2 = Rotational acceleration criterion which measures the risk of trauma due to
tangential impacts on the impact surface.
During this important phase, agv worked and has been working in
conjunction with MIPS AB STOCCOLMA e PADUA UNIVERSITY, (Mechanical Engineering, Materials Characterisation).
WIND TUNNEL TESTING
Comfort is safety. A well-ventilated, quiet and balanced helmet is much less tiring for a rider to wear, allowing them to focus more effectively on riding.
During wind tunnel testing, comfort is measured using the following criteria:
- Cx Aerodynamic drag coefficient
- Shows the helmet's resistance to motion and therefore the force the neck muscles need to exert to oppose this resistance.
- Db Decibel
- The noise generated by airflow outside and inside the helmet.
- Δt Ventilation heat exchange
- Measurement of the helmet ventilation system's ability to convey heat and moisture away from the rider's head.
- Measurement of buffeting
- caused by turbulence around the helmet at different speeds (buffeting frequency in MHz).
- Measurement of the lift
- the helmet exerts on the rider's head in Newtons.
A helmet designed expressly for professional use.
Sets new performance standards with its wide field of vision, low weight and compact dimensions, extensive ventilation, exclusive ergonomic design and class-leading aerodynamics.
A helmet that combines the performance of the Pista GP with road features such as adjustable air vents, variable aerodynamics with a removable spoiler, and increased comfort - yet achieves this without sacrificing the performance standards of the GP model.
A helmet that takes the concepts developed for the Pista model and adapts them to Touring/Sport Touring use on the road, shifting the balance towards comfort performance.
The GT Veloce has been designed to provide compact dimensions, comfort and low noise levels, a highly efficient ventilation system and wide field of vision - all while being extremely practical to use.
Residual impact force transmitted to the head, 31% below the limit set by the standard. The result is achieved thanks to the numerous FEM simulations and in-house tests carried out.
HIC index 48% below the limit set by the standard. The HIC (Head Injury Criterion) index measures the level of brain trauma risk due to the accelerations of impact. In this case too, the result is achieved thanks to the numerous FEM simulations and in-house tests carried out.
71% more compact visor movement. This allows use of the space saved to increase the thickness of the absorption material, benefitting safety.
9% bigger visor window 9%. This gives the rider better visibility of the track in front and
laterally when bent over the bike riding straight ahead, benefitting active safety.
3% smaller frontal section and 6% small lateral section: the helmet is more compact and lighter, without reducing passive safety and comfort.
Aerodynamic resistance (Cd) reduced by 17%. The lower the Cd value, the lower the
amount of stress transmitted to the rider’s neck, with an increase in comfort and reduction
of fatigue. Attentive design, computational fluid dynamic tests and wind tunnel testing have
obtained an average 17% reduction of the Cd while racing.
193% increase in vent surface. The position and size of the vents and computational
fluid dynamic wind tunnel testing have generated a ventilation system capable of
effectively removing heat and humidity.