I'm looking for a dummy head (i.e. Hybrid III) to measure head acceleration due to impulsive loading. It'b great to have a measure of forces and moments acting on different level of the cervical spine joints attached to the dummy head.
Dario -- I echo David's comment, but you'll want to consider talking with Humanetics (Detroit, Michigan, USA) first. Depending on your application, HIII may not be appropriate for inertial loading if you are quantifying complex flexion/extension/bending/torsion.
And you might also consider contacting TASS International about MADYMO modeling. You may be able to learn much about your measurement using a simulation first, as opposed to buying a bunch of ATD parts and sensors and trying to learn empirically.
Best of luck,
Adam
Adam -- Thanks a lot! Yep, I am currently working on computer simulation and musculoskeletal modelling, and even though that approach includes several limitations, it is still possible to get reliable results with computer simulation models driven by "in-vivo data". I was wondering how much Hybrid III can replicate 'in-vivo' measurement (no muscles, different material properties, cervical spine joint models) and your answer has confirmed my sceptical position.
Thanks a lot.
Dario
I am sure there are several studies out there if you just looking for comparison between dummy and cadaveric data im maany impact modes. Here is a comparison for head drop tests between adult and atd heads.
http://www.ircobi.org/downloads/irc12/pdf_files/64.pdf
Hi Dario,
we used a Hybrid III to simulate impacts during skiing. I can send you some stuff if you're interested.
Cheers
Fausto
Hi Fausto,
It'd be brilliant!
I've read several papers focused on inertial properties of H-III and it seems to be ok with that. I'm a bit scared by its reliability and ecological validity ion terms of cervical spine kinematics. We could have a chat soon, if you have 5 spare mins.
Cheers
Dario
Hi Dario,
I'd also recommend to check Humanetics and/or Dynamore for dummy models. Especially for spinal loads from rear end impact (indirect and direct loading of the head) the BioRID could be used. However, I'm not sure about validation for other directions of impact.
Kind regards
Sylvia
Dario,
We have used Humanetics Hybrid III to study fall related head impacts. In the attached paper you can find a comparison between the ATD head response and cadaver tests/MADYMO simulation. Also you can find more about instrumentation of the head, filter selection etc.
Regards,
Morteza
Article Response of an Impact Test Apparatus for Fall Protective Hea...
Hi Dario,
I'm agree with Morteza to use Humanetics Hybrid III but on the other hand you can provide the sensors which can exactly measure what you need. many sensors and devices exist which you can buy easily and manipulate them to show what you want.
but all of my suggestion is depend your time, budget and the specification of your study.
Regards
I would recommend reading up on the Hy3 neck, in particular what it is considered 'validated' for.
You also may consider the NOCSAE heads - they come in three sizes and now can be fit with the 3-2-2-2 accel array needed to measure angular and linear accel
The Hybrid III can be fitted with both upper and lower neck load cells, measuring 6-axes of forces and moments at the C0 and C7 locations. The Hy3 was originally designed against force-bending angle corridors for frontal flexion and rearward extension. The neck was later determined to be reasonable for lateral flexion also. It is not biofidelic in tension/compression however some injury assessment functions have been developed for those modes. See IARV's in
Accidental Injury
Biomechanics and Prevention
Editors: Yoganandan, N., Nahum, A.M., Melvin, J.W., (Eds.)
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