Study Of Activities Classify And Step Detection Base On The Three-Dimensional Acceleration Sensor

When we are talking about positioning system, GPS(Global Positioning System) is a maturely and accuracy method, it can acquire a relatively high accuracy with a GPS sensor which can get position information from more than 4 GPS satellites. But in some situations (e.g. Battles or fire scene), GPS can't be used. So we have to use the DR (Dead Reckoning) way to make nodes self-localization.This article absorbs the previous research in related fields, especial experiences in our work group. The method used in this article is the way which gets every note a acceleration sensor to get its motive information. Activities classify and Step detection with acceleration sensor is a very important part in DR (Dead Reckoning). This method detects nodes'motions with acceleration information. Sensor is set on people's ankle. This article pre-processes the raw data, detects steps with the acceleration information and finds a feasible activities classify from the mass experiments.