Accelerometer for Upper Limb Movement Monitoring

How about biaxial at the shoulder, triaxial at the elbow, and nothing at the wrist?

Thanks! I can figure why.

Do you have experience in accelerometers? I am using memsic 2D acc from Parallax. They provide documentation on how to convert pwm output from their acc into force and also angle and rotation to display.

For the 3D accc, I am using LIS331AL in the form of STEVAL-MKI021V1 demo kit. The acc output is analog dc voltage centered at VDD/2 for 0g. Can I use this output directly or do I need to do some processing/conversion prior to display. What are the parameters usually displayed for upper limb activity monitoring? I have search the web and get lots of info regard complex processing algorithmn for activity recognition and such, which I am not sure is applicable for I am doing this project as fulfillment for the part time embedded systems diploma course and we are given abt a month to complete.

P.S. Does anyone know of some ready made processing algo for tri-axial accelerometers written in C (regard the above)? I am using a STCortex ARM-7 processor in the form of MCBSTM32E eval board.

Lastly, does anyone know where to download a cracked copy of Keil uVision4? The eval copy limits the code size to 32KB.

Many thanks for the above.

I am not familiar with particular brands of accelerometers; I was thinking in terms of degrees of freedom for shoulder and elbow movements.

You can move your shoulder forward/back, and up/down, but not really in/out. Thus I thought biaxial. If the shoulder remains fixed, the elbow also has two degrees of freedom: forward/back, and out-up/in-down. Biaxial might suffice for this as well, but maybe triaxial is more convenient.

I don't know if a simplified model would fit into 32KB of code. It sounds like an interesting project, but in your time frame you won't be able to get very fancy.