{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,13]],"date-time":"2026-04-13T21:18:13Z","timestamp":1776115093498,"version":"3.50.1"},"reference-count":93,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2023,7,10]],"date-time":"2023-07-10T00:00:00Z","timestamp":1688947200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Polytechnic Institute of Coimbra","award":["12598\/2020"],"award-info":[{"award-number":["12598\/2020"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Imaging"],"abstract":"<jats:p>Augmented Reality (AR) is a technology that allows virtual elements to be superimposed over images of real contexts, whether these are text elements, graphics, or other types of objects. Smart AR glasses are increasingly optimized, and modern ones have features such as Global Positioning System (GPS), a microphone, and gesture recognition, among others. These devices allow users to have their hands free to perform tasks while they receive instructions in real time through the glasses. This allows maintenance professionals to carry out interventions more efficiently and in a shorter time than would be necessary without the support of this technology. In the present work, a timeline of important achievements is established, including important findings in object recognition, real-time operation. and integration of technologies for shop floor use. Perspectives on future research and related recommendations are proposed as well.<\/jats:p>","DOI":"10.3390\/jimaging9070142","type":"journal-article","created":{"date-parts":[[2023,7,11]],"date-time":"2023-07-11T01:40:02Z","timestamp":1689039602000},"page":"142","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":27,"title":["Augmented Reality in Maintenance\u2014History and Perspectives"],"prefix":"10.3390","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9313-9332","authenticated-orcid":false,"given":"Ana","family":"Malta","sequence":"first","affiliation":[{"name":"Coimbra Institute of Engineering, Rua Pedro Nunes-Quinta da Nora, Polytechnic Institute of Coimbra, 3030-199 Coimbra, Portugal"},{"name":"RCM2+ Research Centre for Asset Management and Systems Engineering, ISEC\/IPC, Rua Pedro Nunes, 3030-199 Coimbra, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9694-8079","authenticated-orcid":false,"given":"Torres","family":"Farinha","sequence":"additional","affiliation":[{"name":"Coimbra Institute of Engineering, Rua Pedro Nunes-Quinta da Nora, Polytechnic Institute of Coimbra, 3030-199 Coimbra, Portugal"},{"name":"RCM2+ Research Centre for Asset Management and Systems Engineering, ISEC\/IPC, Rua Pedro Nunes, 3030-199 Coimbra, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4313-7966","authenticated-orcid":false,"given":"Mateus","family":"Mendes","sequence":"additional","affiliation":[{"name":"Coimbra Institute of Engineering, Rua Pedro Nunes-Quinta da Nora, Polytechnic Institute of Coimbra, 3030-199 Coimbra, Portugal"},{"name":"RCM2+ Research Centre for Asset Management and Systems Engineering, ISEC\/IPC, Rua Pedro Nunes, 3030-199 Coimbra, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2023,7,10]]},"reference":[{"key":"ref_1","unstructured":"(2022, May 31). 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