FMVSS201 Headform
Publishdate：2025-12-12 Views：12
FMVSS201 Free-Motion Headform Impactor
The Free Motion Headform (FMH) specified in FMVSS 201 (Federal Motor Vehicle Safety Standard 201) is a core testing equipment used to evaluate the impact protection capability of vehicle interior components against occupant head impacts. This standard primarily targets areas prone to head impacts, such as vehicle dashboards and pillars, and verifies design safety by simulating head impact scenarios.
The FMVSS 201 standard outlines specific test requirements for the free-motion headform impactor: The impactor is a hollow metal sphere with a diameter of 254 millimeters, equipped with an acceleration sensor inside and weighing approximately 1.8 kilograms. Its movement allows for free rotation during impact, to more accurately simulate the dynamic response of the human head. During testing, the impactor impacts the interior surface of the vehicle at a speed of 24 kilometers per hour, with the calculated Head Injury Criterion (HIC) value required to not exceed 1000, to ensure that the crash risk remains within an acceptable range.
FMVSS201 Free-Motion Headform Impactor
The Free Motion Headform (FMH) specified in FMVSS 201 (Federal Motor Vehicle Safety Standard 201) is a core testing equipment used to evaluate the impact protection capability of vehicle interior components against occupant head impacts. This standard primarily targets areas prone to head impacts, such as vehicle dashboards and pillars, and verifies design safety by simulating head impact scenarios.
The FMVSS 201 standard outlines specific test requirements for the free-motion headform impactor: The impactor is a hollow metal sphere with a diameter of 254 millimeters, equipped with an acceleration sensor inside and weighing approximately 1.8 kilograms. Its movement allows for free rotation during impact, to more accurately simulate the dynamic response of the human head. During testing, the impactor impacts the interior surface of the vehicle at a speed of 24 kilometers per hour, with the calculated Head Injury Criterion (HIC) value required to not exceed 1000, to ensure that the crash risk remains within an acceptable range.
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