{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T03:45:59Z","timestamp":1760240759224,"version":"build-2065373602"},"reference-count":26,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2019,9,7]],"date-time":"2019-09-07T00:00:00Z","timestamp":1567814400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["51475384"],"award-info":[{"award-number":["51475384"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Xi'an Key Laboratory of Intelligent Detection and Perception","award":["201805061ZD12CG45"],"award-info":[{"award-number":["201805061ZD12CG45"]}]},{"name":"Natural Science Basic Research Project of Shannxi","award":["2016JM6046"],"award-info":[{"award-number":["2016JM6046"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A zero-cross detection algorithm was proposed for the cavity-length interrogation of fiber-optic Fabry\u2013Perot (FP) sensors. The method can avoid the inaccuracy of peak determination in the conventional peak-to-peak method for the cavity-length interrogation of fiber-optic FP sensors caused by the slow variation of the spectral power density in peak neighboring regions. Both simulations and experiments were carried out to investigate the feasibility and performance of the zero-cross detection algorithm. Fiber-optic FP sensors with cavity lengths in the range of 150\u20131000 \u03bcm were successfully interrogated with a maximum error of 0.083 \u03bcm.<\/jats:p>","DOI":"10.3390\/s19183868","type":"journal-article","created":{"date-parts":[[2019,9,9]],"date-time":"2019-09-09T04:12:40Z","timestamp":1568002360000},"page":"3868","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["A Zero-Cross Detection Algorithm for Cavity-Length Interrogation of Fiber-Optic Fabry\u2013Perot Sensors"],"prefix":"10.3390","volume":"19","author":[{"given":"Zhibo","family":"Ma","sequence":"first","affiliation":[{"name":"Key Lab of Micro\/Nano Systems for Aerospace, Ministry of Education, Northwestern Polytechnical University, Xi\u2019an 710072, China"},{"name":"Shaanxi Key Lab of MEMS\/NEMS, Northwestern Polytechnical University, Xi\u2019an 710072, China"}]},{"given":"Zechen","family":"Song","sequence":"additional","affiliation":[{"name":"Key Lab of Micro\/Nano Systems for Aerospace, Ministry of Education, Northwestern Polytechnical University, Xi\u2019an 710072, China"},{"name":"Shaanxi Key Lab of MEMS\/NEMS, Northwestern Polytechnical University, Xi\u2019an 710072, China"}]},{"given":"Xirui","family":"Huang","sequence":"additional","affiliation":[{"name":"School of Optoelectronic Engineering, Xi\u2019an Technological University, Xi\u2019an 710021, China"},{"name":"Shaanxi Province Key Lab of Photoelectric Measurement and Instrument Technology, Xi\u2019an Technological University, Xi\u2019an 710021, China"}]},{"given":"Tongxin","family":"Guo","sequence":"additional","affiliation":[{"name":"Key Lab of Micro\/Nano Systems for Aerospace, Ministry of Education, Northwestern Polytechnical University, Xi\u2019an 710072, China"},{"name":"Shaanxi Key Lab of MEMS\/NEMS, Northwestern Polytechnical University, Xi\u2019an 710072, China"}]},{"given":"Weizheng","family":"Yuan","sequence":"additional","affiliation":[{"name":"Key Lab of Micro\/Nano Systems for Aerospace, Ministry of Education, Northwestern Polytechnical University, Xi\u2019an 710072, China"},{"name":"Shaanxi Key Lab of MEMS\/NEMS, Northwestern Polytechnical University, Xi\u2019an 710072, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2978-7359","authenticated-orcid":false,"given":"Haibin","family":"Chen","sequence":"additional","affiliation":[{"name":"School of Optoelectronic Engineering, Xi\u2019an Technological University, Xi\u2019an 710021, China"},{"name":"Shaanxi Province Key Lab of Photoelectric Measurement and Instrument Technology, Xi\u2019an Technological University, Xi\u2019an 710021, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4992-5085","authenticated-orcid":false,"given":"Tianyang","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Optoelectronic Engineering, Xi\u2019an Technological University, Xi\u2019an 710021, China"},{"name":"Shaanxi Province Key Lab of Photoelectric Measurement and Instrument Technology, Xi\u2019an Technological University, Xi\u2019an 710021, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8501-8036","authenticated-orcid":false,"given":"Wei","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Optoelectronic Engineering, Xi\u2019an Technological University, Xi\u2019an 710021, China"},{"name":"Shaanxi Province Key Lab of Photoelectric Measurement and Instrument Technology, Xi\u2019an Technological University, Xi\u2019an 710021, China"}]}],"member":"1968","published-online":{"date-parts":[[2019,9,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"45","DOI":"10.1006\/ofte.2000.0344","article-title":"Industrial Applications of the BOTDR Optical Fiber Strain Sensor","volume":"7","author":"Ohno","year":"2001","journal-title":"Opt. 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