Prosthetic System Definition Update
After testing the EMG sensor and a joint meeting with the Hand group, the responsibilities of each E&C division had been set in stone. The decisions of this meeting had been protocolled in meeting minutes as well as on a drawing with each member signed.
Figure 1 – E&C Agreement with the Hand
In the following weeks the Level 1 and Level 2 requirements had been finalized and the System Block Diagram could be updated. In the final design two indicator LEDs had been added as well as a Kill Switch. The Kill Switch gives the user the possibility to power off the system (immediately) in the event he doesn’t feel comfortable with the systems behavior.
Also there’s no need to communicate between the two systems anymore so the I2C lines had been removed.
The tests of the MyoWare muscle sensor also came to the conclusion that one motion can be tracked sufficient enough with one sensor. But a second sensor is not enough to provide a second motion. A second motion might be accomplished with a third sensor. Since the Project requirement can be fulfilled with one motion and in regard to the budget only one EMG sensor will be used.
All this led to this updated System Block Diagram.
Figure 2 – Resulting and Updated Block System Diagram