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A low-cost in-situ CO_(2) sensor based on a membrane and NDIR for long-term measurement in seawater

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Journal of Oceanology and Limnology 2022年第3期40卷 986-998页

作者： Meng LI Baolu DU jinjia guo Zhihao ZHANG Zeyu LU Rong’er ZHENG College of Information Science and Engineering Ocean University of ChinaQingdao 266100China R&D Center for Marine Instruments and Apparatuses Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

The multi-point simultaneous long-term measurement of CO_(2) concentration in seawater can provide more-valuable data for further understanding of the spatial and temporal distribution of CO_(2).Thus,the requirement for a low-cost sensor with high precision,low power consumption,and a small size is becoming *** this work,an in-situ sensor for CO_(2) detection in seawater,based on a permeable membrane and non-dispersive infrared(NDIR)technology,is *** sensor has a small size(Ф66 mm×124 mm),light weight(0.7 kg in air),low power consumption(<0.9 W),low cost(

关键词： in-situ sensor dissolved CO_(2) long-term measurement permeable membrane non-dispersive infrared(NDIR) low-cost

Comparison of Visibility Measurements over Horizontal Path by Micro-pulsed Lidar and Visibility Meter

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Journal of Ocean University of China 2007年第3期6卷 315-318页

作者： guo jinjia SUN Zhaobin LIU Zhishen The Key Laboratory of Ocean Remote Sensing Ministry of Education Ocean University of ChinaQingdao 266003 P. R. China

As a powerful tool to scan the atmosphere, the I idar can derive visibility values by directly collecting the backscattering laser light from the atmosphere. Simultaneous measurements of atmospheric visibility by Micro-pulsed lidar （MPL） and a commercial visibility meter （VM） NQ-1 have been performed to evaluate the feasibility of the MPL system designed by the Ocean Remote Sensing Laboratory （ORSL） of the Ocean University of China （OUC） from October 21 2005 to November 21 2005 in the Shilaoren Sightseeing Garden on the Qingdao coast. All the 880 data samples obtained by the two instruments have high correlation coefficients （up to 0.86）, which indicates it is feasible to utilize MPL to measure atmospheric visibility.

关键词： visibility Micro-pulsed lidar visibility meter extinction coefficient aerosol

Measuring^(222)Rn in aquatic environment via Pulsed Ionization Chamber Radon Detector

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Acta Oceanologica Sinica 2023年第8期42卷 185-189,I0001-I0006页

作者： Lijun Song Wen Liu Shibin Zhao Chunqian Li jinjia guo Natasha Dimova Bochao Xu Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education Ocean University of ChinaQingdao 266100China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100China College of Information Science and Engineering Ocean University of ChinaQingdao 266100China R&D Center for Marine Instruments and Apparatuses Qingdao Marine Science and Technology CenterQingdao 266200China Department of Geological Sciences College of Arts and SciencesUniversity of AlabamaTuscaloosa 35487USA

Radon(Rn)is a naturally occurring radioactive inert gas in nature,and^(222)Rn has been routinely used as a powerful tracer in various aquatic environmental research on timescales of hours to days,such as submarine groundwater *** we developed a new approach to measure^(222)Rn in discrete water samples with a wide range of^(222)Rn concentrations using a Pulsed Ionization Chamber(PIC)Radon *** sensitivity of the new PIC system is evaluated at 6.06 counts per minute for 1 Bq/L when a 500 mL water sample volume is used.A robust logarithmic correlation between sample volumes,ranging from 250 mL to 5000 mL,and system sensitivity obtained in this study strongly suggests that this approach is suitable for measuring radon concentration levels in various natural *** to the currently available methods for measuring radon in grab samples,the PIC system is cheaper,easier to operate and does not require extra accessories(e.g.,drying tubes etc.)to maintain stable measurements throughout the counting procedure.

关键词： ^(222)Rn radon measurement Pulsed Ionization Chamber Radon Detector radon in discrete water samples submarine groundwater discharge

Spectral characteristics of underwater laser-induced breakdown spectroscopy under high-pressure conditions

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Plasma Science and Technology 2020年第7期22卷 28-35页

作者： Lintao WANG Ye TIAN Ying LI Yuan LU jinjia guo Wangquan YE Ronger ZHENG Optics and Optoelectronics Laboratory Ocean University of ChinaQingdao 266100People's Republic of China

Laser-induced breakdown spectroscopy(LIBS) has been proven to be an attractive technique for in situ oceanic ***,when applying LIBS into deep-sea,the pressure effect caused by different ocean depths is inescapable and could have great influence on the LIBS *** this work,spectral characteristics of underwater LIBS were investigated as a function of pressure in the range of 0.1-45 MPa.A high-pressure chamber built in the laboratory was used to simulate the high-pressure deep-sea *** laser energy and detection delay were first determined under different pressure conditions and were shown to be independent of the external *** increase in pressure has a significant impact both on the peak intensity and line broadening of the observed *** peak intensity of Na,Li and K lines increases with the increasing pressure until a maximum intensity is reached at 12.5 *** this value,the peak intensity decreases gradually up to 45 *** Ca line,the maximum intensity was observed at 30 *** line broadening keeps constant at low pressures from 0.1-10 MPa,while it increases linearly at higher pressures,indicating a higher electron density caused by the compression effect of the high external *** also compared the spectral data obtained from the high-pressure chamber and from the field sea trials,and the good consistency between the laboratory data and sea-trial data suggested the key role of pressure effect on underwater LIBS signals for practical deep-sea applications.

关键词： underwater laser-induced breakdown spectroscopy spectral characteristics high-pressure chamber pressure effect deep-sea application

In-situ detection equipment for radon-in-water:unattended operation and monthly investigations

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Acta Oceanologica Sinica 2023年第8期42卷 178-184页

作者： Chunqian Li Meng Li Guangquan Chen Huaming Yu Chenglun Zhang Wen Liu jinjia guo Shibin Zhao Lijun Song Xiliang Cui Ying Chai Lu Cao Diansheng Ji Bochao Xu Faculty of Information Science and Engineering Ocean University of ChinaQingdao 266100China R&D Center for Marine Instruments and Apparatuses Qingdao Marine Science and Technology CenterQingdao 266200China Key Laboratory of Marine Sedimentology and Environmental Geology First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266100China Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education Ocean University of ChinaQingdao 266100China College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100China Institute of Oceanographic Instrumentation Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Techno1ogyQilu University of Technology(Shandong Academy of Sciences)Qingdao 266061China Yantai Marine Environment Monitoring Central Station of State Oceanic Administration Yantai 264003China

Radon is recognized as a powerful tracer of certain geophysical processes in marine and aquatic *** the past few decades,the instruments and methods for measuring radon concentration in water have been developed to some extent but still lack underwater in-situ *** we present an in-situ detection equipment for radon-in-water(pulsed ionization chamber(PIC)-radon)to measure dissolved radon in ocean and groundwater *** equipment has been successfully deployed in the Jiaozhou Bay in July 2022 and has achieved 14 d of unattended underwater in-situ *** it was successfully placed in a groundwater monitoring well in the Laizhou Bay in November 2022 and monitored radon activities for over 30 *** results showed that this instrument had a good indication of submarine groundwater *** PIC-radon detector takes advantage of smaller size,lower power consumption,and is barely influenced by humidity,making it particularly suitable for long-term in-situ measurement,especially in harsh environments with limited human care or deployment spaces.

关键词： radon pulsed ionization chamber(PIC) in-situ measurement membrane groundwater ocean

Spectra-assisted laser focusing in quantitative analysis of laser-induced breakdown spectroscopy for copper alloys

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Plasma Science and Technology 2023年第4期25卷 204-209页

作者：李守杰郑荣儿出口祥啓叶旺全田野郭金家李颖卢渊 College of Physics and Optoelectronic Engineering Ocean University of ChinaQingdao 266100People’s Republic of China Graduate School of Advanced Technology and Science Tokushima UniversityTokushima 770-8501Japan

Laser-induced breakdown spectroscopy(LIBS)is a capable technique for elementary analysis,while LIBS quantitation is still under *** quantitation,precise laser focusing plays an important role because it ensures the distance between the laser and *** the present work,we employed spectral intensity as a direct way to assist laser focusing in LIBS quantitation for copper *** is found that both the air emission and the copper line could be used to determine the position of the sample surface by referencing the intensity ***,the fine quantitation was only realized at the position where the air emission(e.g.O(I)777.4 nm)reached intensity maximum,and also in this way,a repeatable quantitation was successfully achieved even after 120 *** results suggested that the LIBS quantitation was highly dependent on the focusing position of the laser,and spectra-assisted focusing could be a simple way to find the identical condition for different samples’*** the future,this method might be applicable in field measurements for LIBS analysis of solids.

关键词： LIBS laser focusing spectra assistance quantitative analysis copper alloys

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环保型丙烯酸防腐涂料应用探讨

石油工程建设 2020年第5期46卷 91-92页

作者：郭锦佳中国石油集团工程技术研究有限公司天津300451

随着新材料、新技术的应用,树脂工业发展速度不断提升,以树脂作为主要原材料的涂料不仅防腐蚀效果明显,还可以起到美化环境、创建人文生活环境的作用。为降低涂装材料对空气的污染,涂装材料逐渐向着水性化、无溶剂和高固体分的方向发展... 详细信息

随着新材料、新技术的应用,树脂工业发展速度不断提升,以树脂作为主要原材料的涂料不仅防腐蚀效果明显,还可以起到美化环境、创建人文生活环境的作用。为降低涂装材料对空气的污染,涂装材料逐渐向着水性化、无溶剂和高固体分的方向发展,水性丙烯酸防腐涂料可以有效发挥环保作用,故此针对环保型丙烯酸防腐涂料的应用进行分析探讨。

关键词：环保型丙烯酸防腐涂料

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深海拉曼光谱仪多平台工作模式的设计与海试

哈尔滨工程大学学报 2017年第1期38卷 147-152页

作者：亓夫军叶旺全任立辉程凯郭金家郑荣儿中国海洋大学光学光电子实验室山东青岛266100

为了解决水下观测平台的多样性与搭载仪器工作模式的匹配问题,将深海集成化自容式拉曼光谱仪(deep ocean compact autonomous Raman spectrometer,DOCARS)的工作模式分为配置外围设备的工作站模式和单一探测功能的传感器模式。在分析DOC... 详细信息

为了解决水下观测平台的多样性与搭载仪器工作模式的匹配问题,将深海集成化自容式拉曼光谱仪(deep ocean compact autonomous Raman spectrometer,DOCARS)的工作模式分为配置外围设备的工作站模式和单一探测功能的传感器模式。在分析DOCARS系统结构的基础上,对这两种工作模式进行了详细设计。系统先后于2009年和2015年搭载海鸟采水器框架和"发现号"水下机器人(ROV)进行海试,前者按工作站模式工作,成功获得了自带样品的拉曼光谱和深海工作图像;后者工作在传感器模式,随ROV下潜的4个潜次中,以1 Hz的频率采集了移动路径上海水的剖面光谱数据。海试结果证明了两种工作模式在搭载相应观测平台时的有效性和稳定性。

关键词：深海拉曼光谱仪(DOCARS) 工作站模式传感器模式搭载平台海试

基于海洋激光雷达的近海表层叶绿素a浓度测量初步测试

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激光与光电子学进展 2019年第5期56卷 117-124页

作者：张锋郭金家李志刚栾晓宁中国海洋大学信息科学与工程学院山东青岛266100 山东省科学院海洋仪器仪表研究所山东青岛266100 鲁东大学物理与光电工程学院山东烟台264025

基于532nm脉冲激光器,搭建了船载三通道海洋激光雷达系统。利用该系统对叶绿素a浓度进行了测量,将所得到的测量结果与商业化叶绿素荧光计的测量结果进行了对比,结果显示,二者的相关系数高达0.84,即表现出良好的线性相关性。为了测试和... 详细信息

基于532nm脉冲激光器,搭建了船载三通道海洋激光雷达系统。利用该系统对叶绿素a浓度进行了测量,将所得到的测量结果与商业化叶绿素荧光计的测量结果进行了对比,结果显示,二者的相关系数高达0.84,即表现出良好的线性相关性。为了测试和评估该系统对表层海水叶绿素a浓度的探测性能,开展了初步现场走航实验,并获取了走航路径上表层海水的叶绿素a浓度的分布状况。结果表明,基于激光雷达探测数据反演的表层海水的叶绿素a浓度与商业化叶绿素荧光计同步探测得到的表层海水的叶绿素a浓度的相关系数可达0.69。

关键词：测量海洋船载激光雷达叶绿素a浓度室内定标走航实验