Title: Apparatus and method for detecting step in a personal navigator
Application Number: 200610151494 Application Date: 2006.09.12
Publication Number: 1932524 Publication Date: 2007.03.21
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G01P15/00;G01C21/00;G01C22/00
Applicant(s) Name: Seoul Nat University Industry Address:
Inventor(s) Name:
Attorney & Agent: hanmeng xing qiuling
Abstract:
    A step detecting apparatus and method in a personal navigator where acceleration signals in at least two directions are acquired from an accelerometer sensor, as a pedestrian moves. Variances of the acceleration signals are calculated and summed. The variance sum is compared with a threshold. If the variance sum is greater than the threshold, it is determined that a detected step is a walking step. If the variance sum is less than the threshold, it is determined that the detected step is a mark-time step.
Time: 7
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