Classification of fall directions via wearable motion sensors

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buir.contributor.authorBarshan, Billur
buir.contributor.orcidBarshan, Billur|0000-0001-6783-6572
dc.citation.epage103129-en_US
dc.citation.spage103129-en_US
dc.citation.volumeNumber125en_US
dc.contributor.authorTuran, M. Ş.
dc.contributor.authorBarshan, Billur
dc.date.accessioned2023-02-16T10:53:46Z
dc.date.available2023-02-16T10:53:46Z
dc.date.issued2022-06-15
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.description.abstractEffective fall-detection and classification systems are vital in mitigating severe medical and economical consequences of falls to people in the fall risk groups. One class of such systems is based on wearable sensors. While there is a vast amount of academic work on this class of systems, not much effort has been devoted to the investigation of effective and robust algorithms and like-for-like comparison of state-of-the-art algorithms using a sufficiently large dataset. In this article, fall-direction classification algorithms are presented and compared on an extensive dataset, comprising a total of 1600 fall trials. Eight machine learning classifiers are implemented for fall-direction classification into four basic directions (forward, backward, right, and left). These are, namely, Bayesian decision making (BDM), least squares method (LSM), k-nearest neighbor classifier (k-NN), artificial neural networks (ANNs), support vector machines (SVMs), decision-tree classifier (DTC), random forest (RF), and adaptive boosting or AdaBoost (AB). BDM achieves perfect classification, followed by k-NN, SVM, and RF. Data acquired from only a single motion sensor unit, worn at the waist of the subject, are processed for experimental verification. Four of the classifiers (BDM, LSM, k-NN, and ANN) are modified to handle the presence of data from an unknown class and evaluated on the same dataset. In this robustness analysis, ANN and k-NN yield accuracies above 96.2%. The results obtained in this study are promising in developing real-world fall-classification systems as they enable fast and reliable classification of fall directions.en_US
dc.identifier.doi10.1016/j.dsp.2021.103129en_US
dc.identifier.eissn1095-4333
dc.identifier.issn1051-2004
dc.identifier.urihttp://hdl.handle.net/11693/111437
dc.language.isoEnglishen_US
dc.publisherAcademic Pressen_US
dc.relation.isversionofhttps://dx.doi.org/10.1016/j.dsp.2021.103129en_US
dc.source.titleDigital Signal Processingen_US
dc.subjectAssistive technologyen_US
dc.subjectFall-direction classificationen_US
dc.subjectMachine learning classifiersen_US
dc.subjectMotion sensorsen_US
dc.subjectWearable sensorsen_US
dc.subjectWearablesen_US
dc.titleClassification of fall directions via wearable motion sensorsen_US
dc.typeArticleen_US

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