For a research study purpose, I am trying to get car's performance data i.e. speed, acceleration, maps (lats & longs) and may be braking during a drive. I need time histories of these parameters. What is the simplest way for me to do that with “reasonable” accuracy and cost. It is important for me to overlay the data on some maps so that I know exactly what was my speed at what point on the road.
I was thinking one of these ways, but I am not sure if I am thinking in right direction. 1) Buy an OBD device and use that. I am not sure if it would export the raw data for me later. And not sure how to overlay GPS data here. 2)Use a cell phone app like speedometer etc. It gives average speed during a drive but again not sure if I will get time history. 3)Another app based method but extract directly accelerometer and gyroscope data and use that somehow to analyze the driving history.