{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T02:08:22Z","timestamp":1760234902197,"version":"build-2065373602"},"reference-count":57,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2021,7,1]],"date-time":"2021-07-01T00:00:00Z","timestamp":1625097600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100014440","name":"Ministerio de Ciencia, Innovaci\u00f3n y Universidades","doi-asserted-by":"publisher","award":["PGC2018-097531-B-100"],"award-info":[{"award-number":["PGC2018-097531-B-100"]}],"id":[{"id":"10.13039\/100014440","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Entropy"],"abstract":"<jats:p>The rehabilitation of a visually impaired person (VIP) is a systematic process where the person is provided with tools that allow them to deal with the impairment to achieve personal autonomy and independence, such as training for the use of the long cane as a tool for orientation and mobility (O&amp;M). This process must be trained personally by specialists, leading to a limitation of human, technological and structural resources in some regions, especially those with economical narrow circumstances. A system to obtain information about the motion of the long cane and the leg using low-cost inertial sensors was developed to provide an overview of quantitative parameters such as sweeping coverage and gait analysis, that are currently visually analyzed during rehabilitation. The system was tested with 10 blindfolded volunteers in laboratory conditions following constant contact, two points touch, and three points touch travel techniques. The results indicate that the quantification system is reliable for measuring grip rotation, safety zone, sweeping amplitude and hand position using orientation angles with an accuracy of around 97.62%. However, a new method or an improvement of hardware must be developed to improve gait parameters\u2019 measurements, since the step length measurement presented a mean accuracy of 94.62%. The system requires further development to be used as an aid in the rehabilitation process of the VIP. Now, it is a simple and low-cost technological aid that has the potential to improve the current practice of O&amp;M.<\/jats:p>","DOI":"10.3390\/e23070848","type":"journal-article","created":{"date-parts":[[2021,7,1]],"date-time":"2021-07-01T12:03:27Z","timestamp":1625141007000},"page":"848","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["A Proposal of a Motion Measurement System to Support Visually Impaired People in Rehabilitation Using Low-Cost Inertial Sensors"],"prefix":"10.3390","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3269-0830","authenticated-orcid":false,"given":"Karla Miriam","family":"Reyes Leiva","sequence":"first","affiliation":[{"name":"Escuela Superior T\u00e9cnica de Ingenieros de Telecomunicaci\u00f3n, Universidad Polit\u00e9cnica de Madrid, 28013 Madrid, Spain"},{"name":"Engineering Faculty, Universidad Tecnol\u00f3gica Centroamericana UNITEC, San Pedro Sula 211001, Honduras"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6350-401X","authenticated-orcid":false,"given":"Milagros","family":"Ja\u00e9n-Vargas","sequence":"additional","affiliation":[{"name":"Escuela Superior T\u00e9cnica de Ingenieros de Telecomunicaci\u00f3n, Universidad Polit\u00e9cnica de Madrid, 28013 Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6920-0965","authenticated-orcid":false,"given":"Miguel \u00c1ngel","family":"Cuba","sequence":"additional","affiliation":[{"name":"Escuela Superior T\u00e9cnica de Ingenieros de Telecomunicaci\u00f3n, Universidad Polit\u00e9cnica de Madrid, 28013 Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sergio S\u00e1nchez","family":"Lara","sequence":"additional","affiliation":[{"name":"Escuela Superior T\u00e9cnica de Ingenieros de Telecomunicaci\u00f3n, Universidad Polit\u00e9cnica de Madrid, 28013 Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jos\u00e9 Javier Serrano","family":"Olmedo","sequence":"additional","affiliation":[{"name":"Escuela Superior T\u00e9cnica de Ingenieros de Telecomunicaci\u00f3n, Universidad Polit\u00e9cnica de Madrid, 28013 Madrid, Spain"},{"name":"Networking Center of Biomedical Research for Bioengineering Biomaterials and Nanomedicine, Instituto de Salud Carlos III, 28029 Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,7,1]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Brady, E., Morris, M.R., Zhong, Y., White, S., and Bigham, J.P. 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