MEMS光纤压力传感器检测电路系统设计
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摘要
针对反射式强度调制型MEMS光纤压力传感器特性,设计了一种基于STC89C52单片机的检测电路系统.系统分为光电转换模块、衰减滤波模块、真有效值转换模块、A/D转换模块和液晶显示模块等.采用OPT101作为光电转换器件,将光纤传输来的光强信号转换成电压信号,对电压信号衰减后通过滤波器输出至AC/DC转换器以及A/D转换器,经过单片机运算和处理将结果显示在液晶屏上并可通过接口输出至电脑.测试结果表明,本次设计的电路具有较高的精度和分辨率.
According to the characteristics of reflective intensity modulated MEMS fiber optic pressure sensor,a detection circuit system based on STC89 C52 microcontroller is designed.The system is divided into photoelectric conversion module,attenuation filter module,true RMS conversion module,A/D conversion module and liquid crystal display module.Using OPT101 as photoelectric conversion device,the light intensity signal transmitted by optical fiber is converted into voltage signal.After attenuation of voltage signal,it is output to AC/DC converter and A/D converter through filter.The results are displayed on the LCD screen and can be output to the computer through the interface.The test results show that the designed circuit has high precision and resolution.
According to the characteristics of reflective intensity modulated MEMS fiber optic pressure sensor,a detection circuit system based on STC89 C52 microcontroller is designed.The system is divided into photoelectric conversion module,attenuation filter module,true RMS conversion module,A/D conversion module and liquid crystal display module.Using OPT101 as photoelectric conversion device,the light intensity signal transmitted by optical fiber is converted into voltage signal.After attenuation of voltage signal,it is output to AC/DC converter and A/D converter through filter.The results are displayed on the LCD screen and can be output to the computer through the interface.The test results show that the designed circuit has high precision and resolution.
引文
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[2] FENG J,ZHAO Y,LI S S,et al.Fiber-optic pressure sensor based on tunable liquid crystal technology[J].IEEE Photonics Journal,2010,2(3):292-298.
[3]王宏亮,宋娟,冯德全,等.应用于特殊环境的光纤光栅温度压力传感器[J].光学精密工程,2011,19(8):546-551.DOI:10.3788/OPE.20111903.0545.WANG H L,SONG J,FENG D Q,et al.High temperature-pressure FBG sensor applied to special environments[J].Optics and Precision Engineering,2011,19(8):546-551.DOI:10.3788/OPE.20111903.0545.
[4] ZHOU X,CHEN K,MAO X,et al.A reflective fiber-optic refractive index sensor based on multimode interference in a coreless silica fiber[J].Optics Communications,2015,340:50-55.
[5]王兰勋,彭景芹,辛儒.一种基于单片机通用口实现串行通信的方法[J].河北大学学报(自然科学版),2005,25(4):431-433.WANG L X,PENG J Q,XIN R.A method of carrying out serial communication among single chip computers using the common ports[J].Journal of Hebei University(Natural Science Edition),2005,25(4):431-433.
[6]朱良琴,姚平,王格林,等.基于OPT101的激光监听仪设计[J].电子设计工程,2015,23(19):8-10.ZHU L Q,YAO P,WANG G L,et al.Design of laser monitor based on OPT101[J].Electronic Design Engineering,2015,23(19):8-10.
[7]田聪.RC有源滤波器的优化设计[D].杭州:浙江师范大学,2016.TIAN C.The optimal design of the RC active filter[D].HangZhou:Zhejiang Normal University,2016.
[8]乐珺,姚恩涛,张明伟,等.基于AD637的直流电源纹波真有效值测量电路设计[J].电源技术,2014,38(10):1926-1929.LE J,YAO E T,ZHANG M W,et al.Design of measurement circuit on true RMS for DC power ripple based on AD637[J].Chinese Journal of Power Sources,2014,38(10):1926-1929.
[9]黄光辉,董天临.16位Σ-ΔA/D转换器AD7705与微控制器的接口设计[J].现代电子技术,2002(5):33-35.HUANG G H,DONG T L.Interface design of 16bΣ-ΔA/D converter AD7705and microcontroller[J].Modern Electronics Technique,2002(5):33-35.
[10]陈勇钢,吴伯农.16位Σ-Δ模数转换器AD7705及其校准[J].现代电子技术,2006(4):124-126.CHEN Y G,WU B N.Introduction and calibration of the 16bsigma delta A/D converter AD7705[J].Modern Electronics Technique,2006(4):124-126.
[11]王艳春,罗少轩.基于MC9S08SH4和AD7705的智能传感器系统设计[J].电子技术应用,2010,36(3):83-85.WANG Y C,LUO S X.Design of intelligent sensor system based on MC9S08SH4and AD7705[J].Application of Electronic Technique,2010,36(3):83-85.
[12]隋鑫,徐熙平,徐海峰,等.反射式光纤传感器光纤对强度调制特性分析[J].长春理工大学学报(自然科学版),2009,32(2):220-223.SUI X,XU X P,XU H F,et al.Analysis on intensity modulation characteristics for optic fiber pair of reflective fiber optic sensor[J].Journal of Changchun University of Science and Technology(Natural Science Edition),2009,32(2):220-223.