Whiplash Testing Protocol - Euro NCAP

Version 3.1
June 2011
Probe displacement = scale reading
Figure 9: Head restraint probe backset for static geometry
6.4 Measure and record reference geometry for BioRID setup
The HRMD probe measurements used for the geometric assessment will be different than the
geometry recorded for use during the BioRID setup. This is due to the curvature of the HRMD
probes and is illustrated in Figure 10.
Since the BioRID is set up based on reference geometry recorded using the HRMD, there is a need to
measure an equivalent feature on both devices. The rear most point on the HRMD skull (i.e. the
screw on the backset probe) is equivalent to the rearmost point on the centreline of the dummy‟s
skullcap. This point can be found using a measuring tape that contours to the shape of the skullcap:
the point is 95mm from the top of the skullcap along the mid sagittal plane of the skull.
6.4.1 Mark an identifiable point on the head restraint along its vertical centreline. A suggested
point is defined by first contact point between backset probe and head restraint.
6.4.2 Ensure that the backset probe is installed and pushed flush against the HRMD, i.e.
stowed/retracted.
6.4.3 Locate the screw on the centre of the rear surface of the HRMD backset probe.
6.4.4 Measure and record the BioRID reference backset using CMM (as defined in Section 2.3.3).
This is the horizontal distance between the rearmost point on the HRMD skull (i.e. the screw
on the retracted backset probe) and the identifiable point on the head restraint +15mm, see
Figure 10.
6.4.5 Ensure that the head restraint has been marked such that it can reliably be returned to the test
position. Move the head restraint to the lowest position as defined in Section 6.1.1. Whilst
maintaining that lowest position, move the head restraint to the most rearward tilt possible as
defined by Section 6.1.3 and 6.2.3.2.4. Measure the HRMD backset and height to the nearest
millimetre using the probes.
22