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Akcelerometryczny system badania i analizy chodu Gait analysis system based on accelerometers


Gait analysis provides useful information about spatio-temporal parameters [10, 11], stability and balance [7], progression of the diseases (Parkinson, Huntington) [7, 8], results of rehabilitation [6] or shock attenuation [7, 9]. The paper describes the accelerometer-based system designed for motion and gait examination. The system consists of two measurement modules with triaxial ADXL accelerometers (Tab. 1), portable computer and software implemented in LabVIEW environment. The system features data transmission via a Bluetooth network and during examination the data is received on a portable computer, visualized on a graph and written in a text file (Fig. 2). The text file has a special header which contains information about the examined person, anatomical axes and a name of the place of module attachment. The all information is introduced by a user at the beginning of the examination. After signal processing, several parameters are calculated: mean duration of the gait cycle, mean duration of swing and stance phases in percentage of the gait cycle, acceleration range (Fig. 1, Tab. 2) [15]. Detection of gait cycle events (heel strike, toe off) is based on the analysis of local extremes of the parameter RSS (Formula 1) [16]. For every anatomical point there is also visualized a graph with accelerations for the whole mean gait cycle (Fig. 4). At the end of data analysis, an examination report as a Microsoft Word document file is prepared. System tests were performed on 17 volunteers (Fig. 3) who underwent gait examination. Depending on the goal, only one or both modules were used.rnThere were different places of module attachment: ankles, knees, hips, sacrum, neck and head. High values of sensitivity (91 -94%) and specificity (88-89%) of event detection as well as satisfactory value of %R&R parameter (16%) were obtained.%Przedmiotem pracy jest system badania i analizy chodu. Pomiary przyspieszeń wykonywane są w różnych punktach anatomicznych z wykorzystaniem trójosiowych czujników przyspieszenia, transmisja danych odbywa się w standardzie Bluetooth, a do akwizycji wykorzystano przenośny komputer. Oprogramowanie służące do zapisu, przetwarzania i analizy danych zostało napisane w środowisku Lab VIEW. Badania chodu przeprowadzono na 17 ochotnikach. Uzyskano parametry związane ze zdarzeniami w cyklu chodu, a także wysokie wartości czułości (91-94%) i specyficzności (88-89%) detekcji zdarzeń oraz satysfakcjonującą wartość parametru %R&R (16%).......

【作者名称】: Piotr MAJ, Katarzyna BARCZEWSKA, Aleksandra DROZD, Jakub KOWALSKI
【作者单位】: AGH AKADEMIA GÓRNICZO-HUTNICZA, WEAIIE, KATEDRA METROLOGII, Al. Mickiewicza 30, Kraków, AGH AKADEMIA GÓRNICZO-HUTNICZA, WEAIIE, KATEDRA AUTOMATYKI, Al. Mickiewicza 30, Kraków, AGH AKADEMIA GÓRNICZO-HUTNICZA, WEAIIE, KATEDRA METROLOGII, Al. Mickiewicza 30, Kraków, AGH AKADEMIA GÓRNICZO-HUTNICZA, WGIG, KATEDRA INŻYNIERII ŚRODOWISKA I PRZERÓBKI SUROWCÓW, Al. Mickiewicza 30, Kraków
【关 键 词】: czujniki przyspieszenia, chód, system bezprzewodowy
【期刊名称】: Running algorithm of simulator of wireless distributed measurement-control system with rule based processing
【期刊论文数据库】: [DBS_Articles_01]
【期刊论文编号】: 108,383,888
【摘要长度】: 2,485
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