一种基于CAV424的电容含水率测量系统设计
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摘要
原油含水的测量在原油提取、工业加工中起着十分重要的作用。设计了一种基于同轴圆柱电容传感器、FPGA高速采样系统的原油含水率测量系统。采用带屏蔽环的同轴圆柱电容传感器,利用CAV424集成芯片将电容传感器产生的信号转换成电压信号,由FPGA处理器控制高速16位A/D转换器采集电压信号、数据运算、含水率显示。试验结果表明,该测量系统的相对误差为2%,满足工程需求。该系统结构简单、响应速度快、计算精度高、适用性强。
The measurement of water content plays an important role in crude oil extraction and industrial processing.A crude oil moisture content measurement system based on coaxial cylindrical capacitance sensor and FPGA high-speed sampling system is designed.A coaxial cylindrical capacitance sensor with a shielding ring is adopted,and CAV424 integrated chip is used to convert the signal generated by the capacitor sensor into voltage signal.The signal,data operation and water content display are collected by a 16-bit A/D converter controlled by FPGA processor.The experimental results show that the relative error of the measuring system is 2%,which meets the industrial demand.The system has simple structure,fast response,high calculation accuracy and strong applicability.
The measurement of water content plays an important role in crude oil extraction and industrial processing.A crude oil moisture content measurement system based on coaxial cylindrical capacitance sensor and FPGA high-speed sampling system is designed.A coaxial cylindrical capacitance sensor with a shielding ring is adopted,and CAV424 integrated chip is used to convert the signal generated by the capacitor sensor into voltage signal.The signal,data operation and water content display are collected by a 16-bit A/D converter controlled by FPGA processor.The experimental results show that the relative error of the measuring system is 2%,which meets the industrial demand.The system has simple structure,fast response,high calculation accuracy and strong applicability.
引文
[1] 刘竹琴,白泽生.原油含水率检测电路的设计[J].仪表技术与传感器,2009,55(5):126-127.
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[5] 宋广军,徐巧玉,王慕坤.电容式原油含水率传感器设计[J].哈尔滨理工大学学报,2003,8(5):108-111.
[6] 韩清堃.电容式储运油泥含水率测量方法研究[D].杭州:浙江大学,2014.
[7] 周啸江.电容式原油含水率分析仪的设计与实现[D].南京:东南大学,2009.
[8] 魏勇,余厚全,陈强,等.原油含水率在线测量仪的实验研究[J].石油仪器,2012,26(6):1-4,101.
[9] 王献峰,石东.基于CAV424的变压器油微水检测[J].电子测量技术,2007,30(6):186-188.
[10] 庞士信,王超.基于CAV424的电容式压力传感器测量电路设计[J].仪表技术与传感器,2011,57(5):1-2.
[11] 曹卫锋,张梅,文方.CAV424倾角传感器的检测系统设计[J].单片机与嵌入式系统应用,2005,5(7):44-46.
[12] 郭彦蕊,黄运生,陈学.基于CAV424的油井含水率在线检测[J].自动化技术与应用,2009,28(2):130-132.
[13] 辛凤艳,孙晓晔.基于FPGA的AD转换控制器设计[J].中国科技信息,2012,24(5):78-79.
[14] 贺秋实,郝国法,钱龙.基于FPGA的高速AD转换[J].电子设计工程,2012,20(8):122-124.
[2] 贺国强.原油含水率测量技术研究[D].西安:西安石油大学,2017.
[3] SUN R,NA J,LIANG G,et al.The Measurement System of the Water Content in Crude Oil[C]// International Conference on Measuring Technology and Mechatronics Automation.IEEE,2010:904-907.
[4] 王晓丹.原油含水率在线测量系统的研发[D].青岛:青岛大学,2008.
[5] 宋广军,徐巧玉,王慕坤.电容式原油含水率传感器设计[J].哈尔滨理工大学学报,2003,8(5):108-111.
[6] 韩清堃.电容式储运油泥含水率测量方法研究[D].杭州:浙江大学,2014.
[7] 周啸江.电容式原油含水率分析仪的设计与实现[D].南京:东南大学,2009.
[8] 魏勇,余厚全,陈强,等.原油含水率在线测量仪的实验研究[J].石油仪器,2012,26(6):1-4,101.
[9] 王献峰,石东.基于CAV424的变压器油微水检测[J].电子测量技术,2007,30(6):186-188.
[10] 庞士信,王超.基于CAV424的电容式压力传感器测量电路设计[J].仪表技术与传感器,2011,57(5):1-2.
[11] 曹卫锋,张梅,文方.CAV424倾角传感器的检测系统设计[J].单片机与嵌入式系统应用,2005,5(7):44-46.
[12] 郭彦蕊,黄运生,陈学.基于CAV424的油井含水率在线检测[J].自动化技术与应用,2009,28(2):130-132.
[13] 辛凤艳,孙晓晔.基于FPGA的AD转换控制器设计[J].中国科技信息,2012,24(5):78-79.
[14] 贺秋实,郝国法,钱龙.基于FPGA的高速AD转换[J].电子设计工程,2012,20(8):122-124.