title: Estimation of traversed distance in level walking using a single inertial measurement unit attached to the waist.
abstract: A method for estimating step length during level walking using a single inertial measurement unit is proposed. A combination of an optimally filtered direct and reverse integration technique and a velocity update technique for the initial velocity values identification was implemented to reduce the effects of the acceleration signals drift. The method takes advantage of the cyclic nature of gait. The inertial measurement unit was placed at waist level on the right side and the method was validated on eight subjects walking for 75 m while varying their speed. The traversed distance was estimated with an average error equal to 0.8% of the total walking distance.
authors.affiliation: Department of Biomedical Sciences, University of Sassari, Sassari, Italy. akose@uniss.it
authors.forename: Alper
authors.initials: A
authors.lastname: Kose
authors.forename: Andrea
authors.initials: A
authors.lastname: Cereatti
authors.forename: Ugo
authors.initials: U
authors.lastname: Della Croce
mesh_terms: D000005:Abdomen / Q000502:physiology; D000054:Acceleration; D056044:Actigraphy / Q000295:instrumentation* / Q000379:methods; D000328:Adult; D000465:Algorithms; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005260:Female; D005684:Gait / Q000502:physiology*; D006801:Humans; D008297:Male; D018670:Monitoring, Ambulatory / Q000295:instrumentation* / Q000379:methods; D005082:Physical Exertion / Q000502:physiology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013647:Task Performance and Analysis; D016138:Walking / Q000502:physiology*