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To Biomch-l,
I need a single axis goniometer to report wrist flexion/extension angle
while other measurements are being done on forearm musculature, as a
subject does slow wrist flexion/extension, and the rest of the arm and body
are not moving.
I searched the archives and found most of the previous discussion on
goniometers to be centered around Biometrics (formerly Penny & Giles)
goniometers and a few comments about other possible suppliers. Due to the
limited movements (directions and speeds) I have planned I hope that I can
measure joint position with a less expensive option than those available
commercially. It seems relatively simple to build a goniometer for a
single axis using a high quality rotary potentiometer and a power supply.
Only 2 comments in the archives discussed this possibility. One said it is
easy to build such a goniometer (but that student's e-mail no longer works,
so I can't get details), and one that says he tried, but it didn't work.
If anyone has any suggestions or comments they would be appreciated.
One point I have already come across is whether a transformer based power
supply is constant enough, or if a higher quality power supply (producing
less fluctuation in supply voltage) is needed.
Thanks,
Gordon Chalmers
************************************************** ***********
Gordon Chalmers, Ph.D.
Dept. of Physical Education, Health and Recreation
Western Washington University, MS-9067
Bellingham WA
U.S.A.
98225-9067
chalmers@cc.wwu.edu
http://www.wwu.edu/~chalmers
Phone: (360) 650-3113
FAX: (360) 650-7447
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I need a single axis goniometer to report wrist flexion/extension angle
while other measurements are being done on forearm musculature, as a
subject does slow wrist flexion/extension, and the rest of the arm and body
are not moving.
I searched the archives and found most of the previous discussion on
goniometers to be centered around Biometrics (formerly Penny & Giles)
goniometers and a few comments about other possible suppliers. Due to the
limited movements (directions and speeds) I have planned I hope that I can
measure joint position with a less expensive option than those available
commercially. It seems relatively simple to build a goniometer for a
single axis using a high quality rotary potentiometer and a power supply.
Only 2 comments in the archives discussed this possibility. One said it is
easy to build such a goniometer (but that student's e-mail no longer works,
so I can't get details), and one that says he tried, but it didn't work.
If anyone has any suggestions or comments they would be appreciated.
One point I have already come across is whether a transformer based power
supply is constant enough, or if a higher quality power supply (producing
less fluctuation in supply voltage) is needed.
Thanks,
Gordon Chalmers
************************************************** ***********
Gordon Chalmers, Ph.D.
Dept. of Physical Education, Health and Recreation
Western Washington University, MS-9067
Bellingham WA
U.S.A.
98225-9067
chalmers@cc.wwu.edu
http://www.wwu.edu/~chalmers
Phone: (360) 650-3113
FAX: (360) 650-7447
---------------------------------------------------------------
To unsubscribe send SIGNOFF BIOMCH-L to LISTSERV@nic.surfnet.nl
For information and archives: http://isb.ri.ccf.org/biomch-l
---------------------------------------------------------------