{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,5]],"date-time":"2026-03-05T17:54:53Z","timestamp":1772733293993,"version":"3.50.1"},"reference-count":30,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2021,1,28]],"date-time":"2021-01-28T00:00:00Z","timestamp":1611792000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"Natural Science Foundation of China","doi-asserted-by":"publisher","award":["51535011; 51675532"],"award-info":[{"award-number":["51535011; 51675532"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The generation and propagation of cracks are critical factors that affect the performance and life of large structures. Therefore, in order to minimize maintenance costs and ensure personal safety, it is necessary to monitor key structures. The sensor based on ultra-high frequency radio frequency identification (UHF RFID) antenna has the advantages of passive wireless, low cost, and great potential in the field of metallic structure health monitoring. In this paper, aimed at the key parts of a metallic structure, a dual-tag system is used for crack monitoring. In conjunction with mode analysis, the principles of the sensing tag and the coupling principles of the dual-tag are analyzed. Considering that the dual-tag is placed in different methods, the effect of mutual coupling on the sensing performance of the tag is studied. The results show that the frequency of the sensing tag can be tuned by adding the interference tag, and the dual-tag sensor system has reasonable sensitivity. The results also provide potential guidance for the optimal placement of multiple tags in the near-field region.<\/jats:p>","DOI":"10.3390\/s21030882","type":"journal-article","created":{"date-parts":[[2021,1,28]],"date-time":"2021-01-28T09:03:45Z","timestamp":1611824625000},"page":"882","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Passive Wireless Dual-Tag UHF RFID Sensor System for Surface Crack Monitoring"],"prefix":"10.3390","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0154-3106","authenticated-orcid":false,"given":"Peng","family":"Wang","sequence":"first","affiliation":[{"name":"School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China"}]},{"given":"Lihong","family":"Dong","sequence":"additional","affiliation":[{"name":"National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China"}]},{"given":"Haidou","family":"Wang","sequence":"additional","affiliation":[{"name":"National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China"}]},{"given":"Guolu","family":"Li","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300401, China"}]},{"given":"Yuelan","family":"Di","sequence":"additional","affiliation":[{"name":"National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, China"}]},{"given":"Xiangyu","family":"Xie","sequence":"additional","affiliation":[{"name":"School of Materials Science and Chemical Engineering, Harbin Engineering University, Heilongjiang 150001, China"}]},{"given":"Dong","family":"Huang","sequence":"additional","affiliation":[{"name":"College of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology, Jiangxi 341000, China"}]}],"member":"1968","published-online":{"date-parts":[[2021,1,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1189","DOI":"10.1177\/1475921718790188","article-title":"Structural health monitoring and fatigue damage estimation using vibration measurements and finite element model updating","volume":"18","author":"Giagopoulos","year":"2019","journal-title":"Struct. 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