It sounds like you are doing some interesting work! And, if you are working with accelerometers it sounds like you have some experience in the subject at hand.
I agree that no helmut technology will eliminate concussions. However, it is possible that there could be
improvements in helmut technology with scientific testing, here is an article from my place on the subject:
The UAB Mix - Smash-mouth football in the lab points the way to better helmets on the field
I've talked to these guys, and although having accelerometers in the helmut could conceivably provide important data
trends with a large enough data set, the problem seems to be that there isn't really a one-to-one correlation between acceleration and concussion, sometimes fairly large accelerations don't seem to cause concussions and sometimes lower accelerations do (like with your daughter's pillow fight). .....However, this isn't really my area of research expertise, so what I say probably should be taken with a grain of salt ....probably a good general rule to follow for anything I say now that I think of it.