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Hu Jiayi
07-03-2003, 03:44 PM
Dear all,
Hi. Thanks for the reply to my question. Below is the summary of the
correspondences.

----- Original Message -----
From: Ruth Mayagotia -Hill
Re: [BIOMCH-L] torque sensors to measure muscle moment


Jiayi,
I have only used forceplates+kinematic data from cameras to obtain moments
during stance or accelerometers+gyroscopes to obtain moments during the
swing phase of gait. The first is provided as standard in most gait lab
equipment packages. The second is detailed in the paper I sent you the
reference for.
Regards,
Ruth

From Hu Jiayi:

Hi.
Thanks for your reply. But I think this is also difficult because the
mass and inertia of both shank and thigh are unknown.
I have not any experience with the dynanometer.
Do you have any idea to measure the torque and those kinematic
parameters with dynanometers?


Rgds
Jiayi
----- Original Message -----
From: Ruth Mayagotia -Hill
Re: [BIOMCH-L] torque sensors to measure muscle moment


Hello George,


You can calculate knee moments during swing using the kinematic
parameters calculated using the method in:
Mayagoitia R E, Nene A V, Veltink P H, ¡°Accelerometer and
rate gyroscope measurement of the kinematics of gait in the saggital plane¡±
, Journal of Biomechanics 35:537-542, 2002.


An example of its application is in:
Nene A V, Mayagoitia R E, Veltink P H, ¡°Assessment of rectus femoris
function during initial swing phase¡±, Gait and Posture 9:1-9, March, 1999.


All the best,
Ruth Mayagoitia-Hill, PhD

From Chang David
Hello,

I would be interested in a summary of your replies.
I would say that the use of torque sensors would have to be done
external to
the joint (i.e. the sensor would have to be mounted on a sort of knee
brace
worn externally). You could then argue that this method of measurement
of
torque would then impact on the normal walking gait. But, I'm not an
expert... just interested.

regards
David Chang
Senior Product Support Engineer
Biomedical Applications Group



From Hu Jiayi:
Hi.
I am a graduate student majoring in Bioengineering in National
University of
Singapore. In the literature, many researchers measured muscle
moments in
their works, using force plate and inverse dynamic equations or
dynamometers. These methods seem hard to wield. Are there any torque
sensors
which can do this like the sensors mounted in the robot joint?
Moreover,
will these torque sensors, which are mounted in the human leg,
influence the
human gait?




Thanks in advance.


George


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---------------------------------------------------
Ruth Mayagoitia-Hill, PhD
Coordinator of Masters in Assistive Technology
Centre of Rehabilitation Engineering
Department of Medical Engineering and Physics
Kings College London
Denmark Hill, London, SE5 9RS
Tel: + 44 (0) 20 7346 1653
http://www.kcl.ac.uk/core





---------------------------------------------------
Ruth Mayagoitia-Hill, PhD
Coordinator of Masters in Assistive Technology
Centre of Rehabilitation Engineering
Department of Medical Engineering and Physics
Kings College London
Denmark Hill, London, SE5 9RS
Tel: + 44 (0) 20 7346 1653
http://www.kcl.ac.uk/core

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