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To address the need for real-time measurement of salinity in water flooding solutions during oilfield water injection, a salinity measurement system that can withstand a high temperature environment was designed. In terms of the polarization and capacitance effects, the system uses an integrator circuit to collect information and fuzzy control to switch gears to expand the range. Experimental results show that the system can operate stably in a high-temperature environment, with an accuracy of 0.6% and an uncertainty of 0.2% in the measurement range of 1\u201310 g\/L.<\/jats:p>","DOI":"10.3390\/s21093086","type":"journal-article","created":{"date-parts":[[2021,4,28]],"date-time":"2021-04-28T22:29:07Z","timestamp":1619648947000},"page":"3086","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Design of a Real-Time Salinity Detection System for Water Injection Wells Based on Fuzzy Control"],"prefix":"10.3390","volume":"21","author":[{"given":"Bo","family":"You","sequence":"first","affiliation":[{"name":"Heilongjiang Provincial Key Laboratory of Complex Intelligent System and Integration, Harbin University of Science and Technology, Harbin 150080, China"},{"name":"School of Automation, Harbin University of Science and Technology, Harbin 150080, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuandong","family":"Yue","sequence":"additional","affiliation":[{"name":"School of Automation, Harbin University of Science and Technology, Harbin 150080, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6528-919X","authenticated-orcid":false,"given":"Mingxiao","family":"Sun","sequence":"additional","affiliation":[{"name":"Heilongjiang Provincial Key Laboratory of Complex Intelligent System and Integration, Harbin University of Science and Technology, Harbin 150080, China"},{"name":"School of Automation, Harbin University of Science and Technology, Harbin 150080, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jiayu","family":"Li","sequence":"additional","affiliation":[{"name":"Heilongjiang Provincial Key Laboratory of Complex Intelligent System and Integration, Harbin University of Science and Technology, Harbin 150080, China"},{"name":"School of Automation, Harbin University of Science and Technology, Harbin 150080, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Deli","family":"Jia","sequence":"additional","affiliation":[{"name":"Department of Oil &amp; Gas Production Equipment, PetroChina Research Institute of Petroleum Exploration &amp; Development, Beijing 100083, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,4,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"126103","DOI":"10.1063\/1.4937355","article-title":"Note: High temperature pressure sensor for petroleum well based on silicon over insulator","volume":"86","author":"Tian","year":"2015","journal-title":"Rev. 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