Article(id=1262079398300213420, tenantId=1146029695717560320, journalId=1260987750510510108, issueId=1262079396291141802, articleNumber=null, orderNo=null, doi=10.19651/j.cnki.emt.2520444, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1766332800000, receivedDateStr=2025-12-22, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1778832776856, onlineDateStr=2026-05-15, pubDate=null, pubDateStr=null, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1778832776856, onlineIssueDateStr=2026-05-15, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1778832776856, creator=13701087609, updateTime=1778832776856, updator=13701087609, issue=Issue{id=1262079396291141802, tenantId=1146029695717560320, journalId=1260987750510510108, year='2026', volume='49', issue='6', pageStart='1', pageEnd='256', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1778832776377, creator=13701087609, updateTime=1778832914473, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1262079975688122904, tenantId=1146029695717560320, journalId=1260987750510510108, issueId=1262079396291141802, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1262079975688122905, tenantId=1146029695717560320, journalId=1260987750510510108, issueId=1262079396291141802, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=39, endPage=46, ext={EN=ArticleExt(id=1262079402813284554, articleId=1262079398300213420, tenantId=1146029695717560320, journalId=1260987750510510108, language=EN, title=Simulation analysis and experimental verification of measuring seawater conductivity with a single resonant coil, columnId=1262079399520755889, journalTitle=Electronic Measurement Technology, columnName=Research and Design, runingTitle=null, highlight=null, articleAbstract=

For coastal estuary water quality monitoring environments, traditional conductivity sensors suffer from issues such as bulky size and susceptibility to corrosion. This paper proposes a non-contact seawater conductivity measurement method based on single-coil sweep-frequency resonant impedance measurement. A coil equivalent circuit model in seawater environments was established, with in-depth analysis of the mechanism by which seawater eddy current losses affect system resonance characteristics. It elucidates the linear mapping relationship between resonant equivalent impedance and seawater conductivity under resonant conditions. Finite element simulation was employed to perform linear fitting on simulated data, validating the accuracy of theoretical derivations. Building on this, a sweep-frequency-based conductivity measurement system was constructed, achieving precise extraction of resonant point impedance. Experimental results demonstrate that in low-conductivity environments (saltwater intrusion), this method maintains consistent high measurement sensitivity, with a maximum fitting error of merely 0.0417 mS/cm. Compared to existing research, the proposed approach significantly enhances detection precision for subtle conductivity variations while improving anti-contamination capabilities. Furthermore, this method enables pre-calculation of fitting parameters via simulation software, thereby reducing human and material resources required for sensor calibration and optimizing sensor fabrication processes. It offers a novel solution for estuary water quality monitoring characterized by low-cost, high-reliability, and high-sensitivity.

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针对沿海地区河口水质监测环境中,传统的电导率测量传感器存在体积庞大、易被腐蚀的问题,本文提出一种基于单线圈扫频测量谐振阻抗的海水电导率非接触测量方法。建立了海水环境下线圈等效电路模型,深入解析了海水涡流损耗对系统谐振特征的影响机理,阐明了在谐振状态下,谐振等效阻抗与海水电导率之间的存在的线性映射关系,采用有限元仿真,对仿真数据进行了线性拟合,验证了理论推导的准确性;在此基础上,搭建了基于扫频技术的电导率测量系统,实现了对谐振点阻抗的精准提取。试验结果表明:在低电导率(咸潮)环境下,该方法保持了恒定且高水平的测量灵敏度,拟合结果最大误差仅为0.041 7 mS/cm。相比于已有研究,本文方法在提升系统抗污染能力的同时,显著增强了对微弱电导率变化的感知精度,并且可以此类方法利用仿真软件提前计算出拟合所需的相关参数,可以节省传感器标定所需要的人力物力,优化传感器制备流程,为河口水质监测提供了一种低成本、高可靠、高灵敏的新方案。

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韩佳盛(通信作者),硕士研究生,主要研究方向为电涡流检测技术。E-mail:
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刘宁,博士,正高级工程师,主要研究方向为海洋观测技术。E-mail:

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单谐振线圈测量海水电导率的仿真分析与试验验证
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刘宁 1, 2 , 韩佳盛 1 , 王韬 1 , 冯书艺 1
电子测量技术 | 研究与设计 2026,49(6): 39-46
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电子测量技术 | 研究与设计 2026, 49(6): 39-46
单谐振线圈测量海水电导率的仿真分析与试验验证
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刘宁1, 2 , 韩佳盛1 , 王韬1, 冯书艺1
作者信息
  • 1.国家海洋技术中心 天津 300112
  • 2.自然资源部海洋观测技术重点实验室 天津 300112
  • 刘宁,博士,正高级工程师,主要研究方向为海洋观测技术。E-mail:

通讯作者:

韩佳盛(通信作者),硕士研究生,主要研究方向为电涡流检测技术。E-mail:
Simulation analysis and experimental verification of measuring seawater conductivity with a single resonant coil
Ning Liu1, 2 , Jiasheng Han1 , Tao Wang1, Shuyi Feng1
Affiliations
  • 1.Nation Ocean Technology Center, Tianjin 300112, China
  • 2.Key Laboratory of Ocean Observation Technology, Ministry of Natural Resources of the People's Republic of China , Tianjin 300112, China
doi: 10.19651/j.cnki.emt.2520444
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针对沿海地区河口水质监测环境中,传统的电导率测量传感器存在体积庞大、易被腐蚀的问题,本文提出一种基于单线圈扫频测量谐振阻抗的海水电导率非接触测量方法。建立了海水环境下线圈等效电路模型,深入解析了海水涡流损耗对系统谐振特征的影响机理,阐明了在谐振状态下,谐振等效阻抗与海水电导率之间的存在的线性映射关系,采用有限元仿真,对仿真数据进行了线性拟合,验证了理论推导的准确性;在此基础上,搭建了基于扫频技术的电导率测量系统,实现了对谐振点阻抗的精准提取。试验结果表明:在低电导率(咸潮)环境下,该方法保持了恒定且高水平的测量灵敏度,拟合结果最大误差仅为0.041 7 mS/cm。相比于已有研究,本文方法在提升系统抗污染能力的同时,显著增强了对微弱电导率变化的感知精度,并且可以此类方法利用仿真软件提前计算出拟合所需的相关参数,可以节省传感器标定所需要的人力物力,优化传感器制备流程,为河口水质监测提供了一种低成本、高可靠、高灵敏的新方案。

电导率测量  /  电涡流检测  /  非接触式测量  /  海水电导率

For coastal estuary water quality monitoring environments, traditional conductivity sensors suffer from issues such as bulky size and susceptibility to corrosion. This paper proposes a non-contact seawater conductivity measurement method based on single-coil sweep-frequency resonant impedance measurement. A coil equivalent circuit model in seawater environments was established, with in-depth analysis of the mechanism by which seawater eddy current losses affect system resonance characteristics. It elucidates the linear mapping relationship between resonant equivalent impedance and seawater conductivity under resonant conditions. Finite element simulation was employed to perform linear fitting on simulated data, validating the accuracy of theoretical derivations. Building on this, a sweep-frequency-based conductivity measurement system was constructed, achieving precise extraction of resonant point impedance. Experimental results demonstrate that in low-conductivity environments (saltwater intrusion), this method maintains consistent high measurement sensitivity, with a maximum fitting error of merely 0.0417 mS/cm. Compared to existing research, the proposed approach significantly enhances detection precision for subtle conductivity variations while improving anti-contamination capabilities. Furthermore, this method enables pre-calculation of fitting parameters via simulation software, thereby reducing human and material resources required for sensor calibration and optimizing sensor fabrication processes. It offers a novel solution for estuary water quality monitoring characterized by low-cost, high-reliability, and high-sensitivity.

conductivity measurement  /  eddy current testing  /  non-contact measurement  /  seawater conductivity
刘宁, 韩佳盛, 王韬, 冯书艺. 单谐振线圈测量海水电导率的仿真分析与试验验证. 电子测量技术, 2026 , 49 (6) : 39 -46 . DOI: 10.19651/j.cnki.emt.2520444
Ning Liu, Jiasheng Han, Tao Wang, Shuyi Feng. Simulation analysis and experimental verification of measuring seawater conductivity with a single resonant coil[J]. Electronic Measurement Technology, 2026 , 49 (6) : 39 -46 . DOI: 10.19651/j.cnki.emt.2520444
  • 天津市自然科学基金(23JCYBJC00590)
2026年第49卷第6期
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doi: 10.19651/j.cnki.emt.2520444
  • 接收时间:2025-12-22
  • 首发时间:2026-05-15
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  • 收稿日期:2025-12-22
基金
天津市自然科学基金(23JCYBJC00590)
作者信息
    1.国家海洋技术中心 天津 300112
    2.自然资源部海洋观测技术重点实验室 天津 300112

通讯作者:

韩佳盛(通信作者),硕士研究生,主要研究方向为电涡流检测技术。E-mail:
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
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