基于DSP的高精度恒温控制系统研究
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摘要
随着光纤通信等技术的发展,半导体激光器作为光源已经被广泛应用在光纤通信系统。激光器产生的热量严重影响着的输出特性如功率、波长等。为保证激光的输出波长和光功率的恒定,必须对激光器进行高精度的恒温控制。
本课题采用热敏电阻作为温度传感器,利用半导体致冷器作为系统执行元件,研制了一种基于DSP的高精度恒温控制系统。
本论文主要研究以下几个方面的内容:首先是对半导体激光器恒温控制器的意义和现状进行了分析。其次,根据对已有的系统方案和原理进行分析,创新性地设计了基于DSP系统的控制结构和方案,并根据系统的需要筛选了满足系统要求的外围器件。硬件的实现是利用热敏电阻通过恒流源激发将温度值转化为电压值,经24位的高精度A/D转换器,转化为便于处理的数字信号提供给DSP。DSP利用数字PID算法对测量温度和设定温度的差值进行控制。输出PWM信号控制DRV592的H全桥电路,驱动TEC热电制冷器对激光器进行双向控温。在LED数码管上实时显示温度的同时,并通过RS-232串口将数据传给PC机便于进行分析和显示控制曲线等。软件部分主要是用C语言在CCS环境下,在已有的硬件基础上进行嵌入式软件的开发、调试。本系统的控温目标是将其控制在25±0.2℃以内。最后,对系统进行实验性的调试,较好地完成了温控系统的各个功能和参数指标。
本文最后提出了该系统的不足之处和改进方法。本系统的设计对于其他同类系统亦具有一定的借鉴意义。
With the development of the optical fiber communication, semiconductor laser as light source has been widely used in optical fiber communication systems. The heat generated by laser has serious impact on the thermal properties, such as output power, wavelength etc. In order to ensure constant output wavelength and constant optical power, we need to do high-precision temperature control to the laser.
This topic A/Dopted thermistor as temperature sensor, used Thermoelectric Cooler (TEC) as system component and developed a high-precision temperature control system based on Digital Signal Processor (DSP).
In this paper, the contents of the following areas were researched: First, analyzed the significance and states of research on semiconductor laser temperature controller; Second, based on the analysis of existing system and principle, designed the control system and selected some peripheral devices, which could meet the need of the system. Taking A/Dvantage of thermal resistance through the constant current source putting the temperature into voltage, and then by 24-bit high-precision A/D converter a convenient digital signal imported into DSP. DSP utilized digital PID algorithm to control difference between measuring temperature and setting temperature. PWM signal controlled DRV592 H bridge circuit and drived TEC to control temperature. LED displayed real-time temperature, at the same time, the data was transported to PC through the RS-232 serial port, allowing for analysis and display control curve. The software part used c language under CCS compiler to develop and debug. The temperature control objective of the system was±0.2℃. Finally, the testing debug of this system meet its all functions and parameters target preferably.
This article concluded some shortcoming and improved methods of this system. The design of this system also has some referred significance to other similar systems.
本课题采用热敏电阻作为温度传感器,利用半导体致冷器作为系统执行元件,研制了一种基于DSP的高精度恒温控制系统。
本论文主要研究以下几个方面的内容:首先是对半导体激光器恒温控制器的意义和现状进行了分析。其次,根据对已有的系统方案和原理进行分析,创新性地设计了基于DSP系统的控制结构和方案,并根据系统的需要筛选了满足系统要求的外围器件。硬件的实现是利用热敏电阻通过恒流源激发将温度值转化为电压值,经24位的高精度A/D转换器,转化为便于处理的数字信号提供给DSP。DSP利用数字PID算法对测量温度和设定温度的差值进行控制。输出PWM信号控制DRV592的H全桥电路,驱动TEC热电制冷器对激光器进行双向控温。在LED数码管上实时显示温度的同时,并通过RS-232串口将数据传给PC机便于进行分析和显示控制曲线等。软件部分主要是用C语言在CCS环境下,在已有的硬件基础上进行嵌入式软件的开发、调试。本系统的控温目标是将其控制在25±0.2℃以内。最后,对系统进行实验性的调试,较好地完成了温控系统的各个功能和参数指标。
本文最后提出了该系统的不足之处和改进方法。本系统的设计对于其他同类系统亦具有一定的借鉴意义。
With the development of the optical fiber communication, semiconductor laser as light source has been widely used in optical fiber communication systems. The heat generated by laser has serious impact on the thermal properties, such as output power, wavelength etc. In order to ensure constant output wavelength and constant optical power, we need to do high-precision temperature control to the laser.
This topic A/Dopted thermistor as temperature sensor, used Thermoelectric Cooler (TEC) as system component and developed a high-precision temperature control system based on Digital Signal Processor (DSP).
In this paper, the contents of the following areas were researched: First, analyzed the significance and states of research on semiconductor laser temperature controller; Second, based on the analysis of existing system and principle, designed the control system and selected some peripheral devices, which could meet the need of the system. Taking A/Dvantage of thermal resistance through the constant current source putting the temperature into voltage, and then by 24-bit high-precision A/D converter a convenient digital signal imported into DSP. DSP utilized digital PID algorithm to control difference between measuring temperature and setting temperature. PWM signal controlled DRV592 H bridge circuit and drived TEC to control temperature. LED displayed real-time temperature, at the same time, the data was transported to PC through the RS-232 serial port, allowing for analysis and display control curve. The software part used c language under CCS compiler to develop and debug. The temperature control objective of the system was±0.2℃. Finally, the testing debug of this system meet its all functions and parameters target preferably.
This article concluded some shortcoming and improved methods of this system. The design of this system also has some referred significance to other similar systems.
引文
[1]黄德修,刘雪峰.半导体激光器及其应用[M].北京:国防工业出版社.1999.
[2]陈铮.半导体激光器[M].武汉:电子科技大学出版社.1994.
[3]E.Anderoni,J.H.Xu S.,A simple system of thermal control and frequency stabilization of solitary diode lasers[J].Review of Scientific Instrument,2000,71(10):3648-3652.
[4]纪天南.电磁高稳定度恒温控制器模块方案设计与实验论证.吉林大学硕士学位论文,2005.
[5]An overview of laser diode characteristics,www.ilxlightwave.com,Application Note No.5.
[6]Fabrizio.High accuracy digital temperature control for a laser diode[J],Rev.Sci.instrurn,1995,8:4051-4054.
[7]K.Chen,G.T.Lin.Optimization of multiple-module thermelec-tric cooler using artificial intelligence techniques[J].International journal of energy research2002,26:1269-1283.
[8]周瑜,丁永奎等.半导体激光器的高精度温控仪[J].量子电子学报,2003.20(4):431-434.
[9]张娜,田小建,罗清龙,单江东.半导体激光器恒温系统PI控制部件的设计[J].吉林大学学报(信息科学版),2003,21(2):220-222.
[10]卢宋荣,薛相美.半导体制冷及其在家用电器中的应用.制冷.2004,23(1):7-11.
[11]张娜.半导体激光器恒温控制理论与应用[J].吉林大学学报(理学版),2002,40(3):284-287.
[12]Hu,M.H.,Liu,X.V.,Hong Ky Nguyen,Chung-en Zah.Dual-thermistor temperature control for semiconductor lasers[J].Electronics Letters.2003,39(6):522-52
[13]陈振林,孙中泉.半导体制冷原理与应用[J].微电子技术,1999,27(5).
[14]张华俊,董晓俊,陶文拴等.风冷热电空调器的研制[J].半导体学报,2001,22(2):220-223.
[15]罗清海,汤广发,李涛.半导体制冷空调的应用与发展前景[J].制冷与空调.2005,5(6):5-9.
[16]李发泉,王玉平,程学武,龚顺生.稳频半导体激光器的温度控制技术[J].光学与光电技术.2005,3(3):29-31.
[17]胡寿松.自动控制原理[M].北京:国防工业出版社.2001.
[18]罗忠生,张美敦等.高精度半导体激光二极管温度控制系统[J].半导体光电.1999,20(2).
[19]覃喜庆,曾祥鸿,董静,李平.基于ADN8830的高性能TEC控制电路[J].光学与光电工程.2004,2(1):21-23.
[20]李水峰,熊予莹,廖常俊.基于ADN8831实现红外单光子探测器的精密温度控制[J].量子电子学报.2007,6(24):704-709.
[21]王茂飞,程昱.DSP技术与应用开发[M].北京:清华大学出版社.2007.
[22]郭少朋,吴岚军,刘鸿.铂电阻多点测温控温设计[J].传感器技术.2004.23(1):67-69.
[23]张翠莲,杨家强,邓善熙.铂电阻温度传感器的非线性特性及其线性化校正方法[J].微计算机信息,2002,1:43-45.
[24]半导体激光器自动控制系统设计[J].应用激光.2004.24(3):165-168.
[25]戚俊,李季,陈结祥.DS18820在大功率激光二极管恒温制冷系统中的应用.量子电子学报,2002.19(2):162-165.
[26]刘畅生.传感器简明手册及应用电路.西安:西安电子科技大学出版社.2005.
[27]马伯宁.基于sigma-delta-ADC的高精度温度测量[J].微处理机.2004,4:55-57.
[28]黎庶.基于AD7711的高精度温度传感电路设计[J].武汉理工大学学报.2005,27(9):104-106.
[29]余勇.一种基于PWM控制的温控系统及其参数自整定[J].自动化与仪表.1999.14(5):22-24.
[30]一种大功率半导体激光器恒温控制系统的设计[J].光电技术应用.2004.4(25):320-322.
[31]Nigim K A,Heydt G T Power quality improvement using integral-PWM control in an AC/AC voltage converter[J].Electric Power System Research,2002,63(1):65-71.
[32]王耀南.智能控制系统—模糊逻辑·专家系统·神经网络控制.湖南大学出版社,1995.
[33]董秀成,杨光,雷霖.自适应Smith预估极点配置自校正PI控制器[J].电子科技大学学报.2000.2(29):70-73.
[34]ZHU Mao-hua,GU Tong-zhao,ZHONG Fu-yan.Research on the temperature control of laser diode[J].Physics and Engineering.2003,13(4):60-61.
[35]戴义保,陈多磊.高精密温度测量的研究与实现[J].自动化仪表.2003,24(3):24-27.
[36]刘和平.TMS320LF240x DSP C语言开发应用[M].北京:北京航天航空大学出版社.2004.
[37]胡汉才.单片机原理及其接口技术[M].北京:清华大学出版社.2002.
[38]Maxim公司.产品资料全集[M].2002.
[39]康兵.PROTELDXP 2004[M].北京:国防工业出版社.2005.
[40]王军宁,吴成柯,党英.数字信号处理器技术原理与开发应用[M].北京:高等教育出版社.2003.
[2]陈铮.半导体激光器[M].武汉:电子科技大学出版社.1994.
[3]E.Anderoni,J.H.Xu S.,A simple system of thermal control and frequency stabilization of solitary diode lasers[J].Review of Scientific Instrument,2000,71(10):3648-3652.
[4]纪天南.电磁高稳定度恒温控制器模块方案设计与实验论证.吉林大学硕士学位论文,2005.
[5]An overview of laser diode characteristics,www.ilxlightwave.com,Application Note No.5.
[6]Fabrizio.High accuracy digital temperature control for a laser diode[J],Rev.Sci.instrurn,1995,8:4051-4054.
[7]K.Chen,G.T.Lin.Optimization of multiple-module thermelec-tric cooler using artificial intelligence techniques[J].International journal of energy research2002,26:1269-1283.
[8]周瑜,丁永奎等.半导体激光器的高精度温控仪[J].量子电子学报,2003.20(4):431-434.
[9]张娜,田小建,罗清龙,单江东.半导体激光器恒温系统PI控制部件的设计[J].吉林大学学报(信息科学版),2003,21(2):220-222.
[10]卢宋荣,薛相美.半导体制冷及其在家用电器中的应用.制冷.2004,23(1):7-11.
[11]张娜.半导体激光器恒温控制理论与应用[J].吉林大学学报(理学版),2002,40(3):284-287.
[12]Hu,M.H.,Liu,X.V.,Hong Ky Nguyen,Chung-en Zah.Dual-thermistor temperature control for semiconductor lasers[J].Electronics Letters.2003,39(6):522-52
[13]陈振林,孙中泉.半导体制冷原理与应用[J].微电子技术,1999,27(5).
[14]张华俊,董晓俊,陶文拴等.风冷热电空调器的研制[J].半导体学报,2001,22(2):220-223.
[15]罗清海,汤广发,李涛.半导体制冷空调的应用与发展前景[J].制冷与空调.2005,5(6):5-9.
[16]李发泉,王玉平,程学武,龚顺生.稳频半导体激光器的温度控制技术[J].光学与光电技术.2005,3(3):29-31.
[17]胡寿松.自动控制原理[M].北京:国防工业出版社.2001.
[18]罗忠生,张美敦等.高精度半导体激光二极管温度控制系统[J].半导体光电.1999,20(2).
[19]覃喜庆,曾祥鸿,董静,李平.基于ADN8830的高性能TEC控制电路[J].光学与光电工程.2004,2(1):21-23.
[20]李水峰,熊予莹,廖常俊.基于ADN8831实现红外单光子探测器的精密温度控制[J].量子电子学报.2007,6(24):704-709.
[21]王茂飞,程昱.DSP技术与应用开发[M].北京:清华大学出版社.2007.
[22]郭少朋,吴岚军,刘鸿.铂电阻多点测温控温设计[J].传感器技术.2004.23(1):67-69.
[23]张翠莲,杨家强,邓善熙.铂电阻温度传感器的非线性特性及其线性化校正方法[J].微计算机信息,2002,1:43-45.
[24]半导体激光器自动控制系统设计[J].应用激光.2004.24(3):165-168.
[25]戚俊,李季,陈结祥.DS18820在大功率激光二极管恒温制冷系统中的应用.量子电子学报,2002.19(2):162-165.
[26]刘畅生.传感器简明手册及应用电路.西安:西安电子科技大学出版社.2005.
[27]马伯宁.基于sigma-delta-ADC的高精度温度测量[J].微处理机.2004,4:55-57.
[28]黎庶.基于AD7711的高精度温度传感电路设计[J].武汉理工大学学报.2005,27(9):104-106.
[29]余勇.一种基于PWM控制的温控系统及其参数自整定[J].自动化与仪表.1999.14(5):22-24.
[30]一种大功率半导体激光器恒温控制系统的设计[J].光电技术应用.2004.4(25):320-322.
[31]Nigim K A,Heydt G T Power quality improvement using integral-PWM control in an AC/AC voltage converter[J].Electric Power System Research,2002,63(1):65-71.
[32]王耀南.智能控制系统—模糊逻辑·专家系统·神经网络控制.湖南大学出版社,1995.
[33]董秀成,杨光,雷霖.自适应Smith预估极点配置自校正PI控制器[J].电子科技大学学报.2000.2(29):70-73.
[34]ZHU Mao-hua,GU Tong-zhao,ZHONG Fu-yan.Research on the temperature control of laser diode[J].Physics and Engineering.2003,13(4):60-61.
[35]戴义保,陈多磊.高精密温度测量的研究与实现[J].自动化仪表.2003,24(3):24-27.
[36]刘和平.TMS320LF240x DSP C语言开发应用[M].北京:北京航天航空大学出版社.2004.
[37]胡汉才.单片机原理及其接口技术[M].北京:清华大学出版社.2002.
[38]Maxim公司.产品资料全集[M].2002.
[39]康兵.PROTELDXP 2004[M].北京:国防工业出版社.2005.
[40]王军宁,吴成柯,党英.数字信号处理器技术原理与开发应用[M].北京:高等教育出版社.2003.