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Jd Johnston
09-26-2008, 05:51 AM
Dear BIOMCH-L subscribers:



I am assisting our College of Kinesiology and undergraduate engineering
students on the development of an impact falling setup for assessing impact
forces & accelerations on the wrist. This area is outside my research focus
and I would appreciate any input.



We are specifically seeking advice regarding wireless accelerometers used
for measuring impact accelerations during falling (forward or backwards),
with a specific emphasis on the wrist. We would like to integrate
accelerometer readings with force plate readings and kinematic motion
analyses (Vicon), using the DAQ system supported by VICON (or with a
stand-along DAQ / LabView).



We will be measuring accelerations in children and adults during falling,
using a foam padding to prevent fractures. The experienced g's when falling
on a foam surface will be less than a realistic setting, hence we will also
simulate realistic falls using experimental testing w/ dummy models.
Different g ranges for the accelerometers will be required for these two
applications, and we would appreciate advice on this issue also.



Our specific questions pertain to:

1. Do you know of any wireless accelerometers which integrate with VICON /
DAQ systems with relative 'ease'?

2. What 'g' ranges did you use for falling studies (dummy-based and
human-based)?

3. Are there any recommended commercially available foam surfaces for
falling studies?

4. What advice would you provide regarding possible pitfalls / troublesome
areas?



Any and all advice would be greatly appreciated.



JD



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James (J.D.) Johnston

Assistant Professor

Department of Mechanical Engineering

University of Saskatchewan

57 Campus Drive

Saskatoon, SK S7N5A9

CANADA

tel: 306.966.1468

fax: 306.966.5427

email: jd.johnston@usask.ca

web:
www.engr.usask.ca/faculty.php?jd.johnston