一种新型原油含水率检测仪的设计与开发
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摘要
针对传统原油含水率检测仪体积质量较大、结构复杂且检测精度易受寄生电容与外界环境影响,设计了一种基于STM32单片机与CAV444电容/电压转换芯片的原油含水率检测仪。原油含水率经平行板电容传感器探头检测后表现为电容值,通过CAV444转换得到差分电压输出,由STM32读取转化为含水率并显示在液晶屏上。实验表明,本系统测量精度高、体积小、质量轻、稳定可靠并易于携带,能满足野外勘探需求,在当前油田探测中具有一定应用价值。
Aiming at the huge volume and big quality of traditonal crude oil water-cut meter,and the problem that the measuring process is volnurable to be influenced by parasitic capacitance and variety of external environment,a new design scheme of hardware circuit based on STM32 singel-chip microcomputer and capacitance to voltage conversion chip CAV444 was proposed in this paper.The moisture content presented as the change of capacitance value after the detection of parallel-plate-capacitance sensor,and converted to differential volatage output through CAV444.The variety of voltage will be read and recorded by STM32 singel-chip microcomputer and converted to rate of water and dispayed on Liquid Crystal Display. The experiment shows that this system is small and light,easy to carry and reliable that it can saisfy the need of wild field.It has high application value in modern oilfield monitoring.
Aiming at the huge volume and big quality of traditonal crude oil water-cut meter,and the problem that the measuring process is volnurable to be influenced by parasitic capacitance and variety of external environment,a new design scheme of hardware circuit based on STM32 singel-chip microcomputer and capacitance to voltage conversion chip CAV444 was proposed in this paper.The moisture content presented as the change of capacitance value after the detection of parallel-plate-capacitance sensor,and converted to differential volatage output through CAV444.The variety of voltage will be read and recorded by STM32 singel-chip microcomputer and converted to rate of water and dispayed on Liquid Crystal Display. The experiment shows that this system is small and light,easy to carry and reliable that it can saisfy the need of wild field.It has high application value in modern oilfield monitoring.
引文
[1] 张乃禄,薛朝妹,徐竟天,等.原油含水率测量技术及其进展[J].石油工业技术监督,2005,21(11):25-28.
[2] 赵雪英,李鹏,金喜平.原油含水率的测试方法[J].辽宁大学学报(自然科学版),2003(2):145-146.
[3] 张国军, 申龙涉, 齐瑞,等. 原油含水率测量技术现状与发展[J]. 当代化工, 2012, 41(1):59-62.
[4] LOVICK J, ANGELI P. Experimental studies on the dual continuous flow pattern in oil-water flows[J]. International Journal of Multiphase Flow, 2004, 30(2):139-157.
[5] WYLIE S R. On-line re-microwave sensor for monitoring the constituents of an oil pipe line[J]. Programmable Controller & Factory Automation, 2007.
[6] Eivind Dahl,Christian Michelsen Research AS.Handbook of Multiphase Flow Metering,Revision 2,March 2005,Norweigan Society for Oil and Gas Measurement.
[7] KRASZEWSKI A. Microwave insrtrumentation for moisture content measurement.Microwave1973,8.
[8] 庞彦斌. 密度法测量原油含水率的误差分析[J]. 中国石油大学学报(自然科学版), 1994(6):116-121.
[9] 肖红兵.γ射线石油含水率/含气率测量仪的研究[D].北京:北京航空航天大学,2004.
[10] 侯培国,张思远.基于CAV444的电容式原油含水率在线检测[J].仪表技术与传感器,2015(8):80-81,87.
[11] 王莉田,王玉田,史锦珊,等.原油含水率测量仪的研究[J].传感技术学报,2000(1):44-48.
[12] 施林生, N.RAUCH. 电容式信号线性转换电压输出的应用电路CAV444[J]. 仪表技术与传感器, 2009(7):106-107.
[13] 阳志杰,倪文军,栗克国,等.基于CAV444的电容式波高传感器的设计与温度补偿[J].仪表技术与传感器,2014(5):11-14,28.
[14] XIONG X, CHENG D, LIU R Z, et al. The design of film thickness measure system based on capacitance sensor[C]. International Conference on Intelligent Computing and Integrated Systems, 2010:334-336.
[15] 周燕.基于CAV444的电容式液位传感器设计[J].工矿自动化,2012,38(5):56-59.
[2] 赵雪英,李鹏,金喜平.原油含水率的测试方法[J].辽宁大学学报(自然科学版),2003(2):145-146.
[3] 张国军, 申龙涉, 齐瑞,等. 原油含水率测量技术现状与发展[J]. 当代化工, 2012, 41(1):59-62.
[4] LOVICK J, ANGELI P. Experimental studies on the dual continuous flow pattern in oil-water flows[J]. International Journal of Multiphase Flow, 2004, 30(2):139-157.
[5] WYLIE S R. On-line re-microwave sensor for monitoring the constituents of an oil pipe line[J]. Programmable Controller & Factory Automation, 2007.
[6] Eivind Dahl,Christian Michelsen Research AS.Handbook of Multiphase Flow Metering,Revision 2,March 2005,Norweigan Society for Oil and Gas Measurement.
[7] KRASZEWSKI A. Microwave insrtrumentation for moisture content measurement.Microwave1973,8.
[8] 庞彦斌. 密度法测量原油含水率的误差分析[J]. 中国石油大学学报(自然科学版), 1994(6):116-121.
[9] 肖红兵.γ射线石油含水率/含气率测量仪的研究[D].北京:北京航空航天大学,2004.
[10] 侯培国,张思远.基于CAV444的电容式原油含水率在线检测[J].仪表技术与传感器,2015(8):80-81,87.
[11] 王莉田,王玉田,史锦珊,等.原油含水率测量仪的研究[J].传感技术学报,2000(1):44-48.
[12] 施林生, N.RAUCH. 电容式信号线性转换电压输出的应用电路CAV444[J]. 仪表技术与传感器, 2009(7):106-107.
[13] 阳志杰,倪文军,栗克国,等.基于CAV444的电容式波高传感器的设计与温度补偿[J].仪表技术与传感器,2014(5):11-14,28.
[14] XIONG X, CHENG D, LIU R Z, et al. The design of film thickness measure system based on capacitance sensor[C]. International Conference on Intelligent Computing and Integrated Systems, 2010:334-336.
[15] 周燕.基于CAV444的电容式液位传感器设计[J].工矿自动化,2012,38(5):56-59.