020-9905 User Manual Q3 (Advanced 3 year old child) Rev G Page 67 of 82
© 2016 Humanetics Innovative Solutions
Frontal Neck Test
Set-up
1.
Assemble the complete neck, as described in section 4.3.
2.
Attach the IF-217 6 AXIS LOAD CELL and TE-2650-11 SPACER FLEXION HEAD FORM
to the head form. Slide the head form over the neck and attach with 4 M5 x 12 SHCS.
3.
Attach the neck to the pendulum interface plate (4 x M5). Place the (modified) 020-
2015 (TE-2650-9) intermediate plate between the neck and pendulum interface. Align
the neck and the interface, making sure that longitudinal axis of the neck is in the
direction of movement of the pendulum arm (see Figure 29).
4.
Attach the head form-neck system to the Part 572 pendulum. The front of the neck
should point in the direction of motion of the pendulum (see Figure 29).
5.
Install the potentiometers to the mounting interface and the on the head form. Mount
the balance weight for the potentiometer on the other side of the head form. This
ensures that the inertial properties of the head are symmetrical in the impact direction.
6.
Insert the rod connecting the axes of the potentiometers and tighten the screw on the
bottom-most axis to secure the rod. The other end of the rod should be able to slide
freely through the upper most transducer axis. The rod must be protruding from both
sides of the transducers axes equal length.
7.
The minimum time interval to observe between tests on the neck is 30 minutes.
Performing the test
1.
Attach honeycomb material to arrest the pendulum. Proposed is to use sheets of
28,8 kg/m
3
with crush strength of 1.8 lbs/cu.ft, with a nominal length of 152.4 mm
(6 inches).
2.
Auto-balancing and shunt calibration of the transducer signals should be performed
with the pendulum arm in the vertical position.
3.
Lift the pendulum up to its pre-test height and check that the head form is in the
correct initial position (symmetric with respect to neck top yoke). Do not leave the
head-neck system in this position for more than 1 minute, as the neck will start to
deform due to the mass of the head form.
4.
Release the pendulum.