高精度称重变送器设计
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摘要
随着我国基础建设投资的增大和发展,基建施工对工期和质量的要求越来越高。混凝土在基建施工的需求量很大,其质量直接影响着基建的质量。采用混凝土生产设备-自动控制的搅拌站就可以保证混凝土的质量,提高混凝土生产效率。混凝土的整个生产工艺过程中,配料最为重要,称重变送器模块是混凝土生产工艺配料中核心模块之一,本论文目的就是设计一款高精度称重变送器。
本设计有以下的特点:
(1)采用Cirrus Logic公司的24位△-∑型CS5532转换器。该转换器采用电荷平衡技术和极低噪声可编程增益斩波稳定测量放大器,能够达到24位分辨率输出结果。宽的动态特性、可编程输出速率、灵活的供电方式以及简便的三线串行输出方式使CS5532成为称重变送器的理想设计方案。此外,CS5532内部有一个完整的自校正系统,可进行自校准和系统校准,可消除A/D本身零点增益和漂移误差,以及系统通道的失调和增益误差。
(2)利用AD623和数字电位器X9C103实现可编程增益放大器。称重变送器处理的信号量程范围为0-36mV,并且要求介于其间的量程变化几乎是无级的,所以选用可通过外接电阻的控制来实现增益变化的放大器AD623,配合数字电位器X9C103实现无级的需求。
(3)介绍了一种新的称重变送器系统漂移校正算法。称重变送器漂移包括零点漂移和增益漂移,实验表明本漂移校正算法能够很好的解决称重变送器的漂移问题。
针对本设计进行模拟实验,由结果数据可以看出,本设计已经达到了预期的设计目标,是一款有效的、经济的设计方案。
With the aggrandizement and development of the infrastructure, it is more and more high with the request of the quantity. Its quantity affects the infrastructure quantity directly. Using the concrete production equipment-automation control agitation station can guarantee the quantity of the concrete and raise the concrete production efficiency. Weight transmitter is a core module in the concrete of whole produce craft process. Highly precise weight transmitter is purpose of this thesis.The characteristics in this paper as follows:(l)The design is based on 24-Bit A/D Converter CS5532 of Cirrus Logic.The highly integrated △- ∑ Analog-to-Digital Converter uses charge-balance techniques to achieve 24-bit performance. High dynamoic range programmable output rates flexible power supply options and simple three-wire serial interface makes the ADC ideal solutions for weigh scale. CS5532 offer both self calibration and system calibration. The calibration can eliminate A/D zero error system channel error and drift error.(2) The hardware circuits with AD623 and potentiometer X9C103 develop programmable gain amplifier. Maxmal singnal range of weight transmitter input is 0 to 36mV.The AD623's gain is resistor programmed by X9C103, or more precisely whatever impedance appears between Pins 1 and 8.(3) A new drift correction algorithm of weight transmitter system is introduced. The drift of weight transmitter includes zero drift and gain drift. Drift correction algorithm perfectly resolves the drift problem practicely.Simulation experiments have been made. The results show that the performance of drift correction algorithm given in this paper is satisfying. The design is relatively high valuable in practice. It is proved to be relatively high effective.
本设计有以下的特点:
(1)采用Cirrus Logic公司的24位△-∑型CS5532转换器。该转换器采用电荷平衡技术和极低噪声可编程增益斩波稳定测量放大器,能够达到24位分辨率输出结果。宽的动态特性、可编程输出速率、灵活的供电方式以及简便的三线串行输出方式使CS5532成为称重变送器的理想设计方案。此外,CS5532内部有一个完整的自校正系统,可进行自校准和系统校准,可消除A/D本身零点增益和漂移误差,以及系统通道的失调和增益误差。
(2)利用AD623和数字电位器X9C103实现可编程增益放大器。称重变送器处理的信号量程范围为0-36mV,并且要求介于其间的量程变化几乎是无级的,所以选用可通过外接电阻的控制来实现增益变化的放大器AD623,配合数字电位器X9C103实现无级的需求。
(3)介绍了一种新的称重变送器系统漂移校正算法。称重变送器漂移包括零点漂移和增益漂移,实验表明本漂移校正算法能够很好的解决称重变送器的漂移问题。
针对本设计进行模拟实验,由结果数据可以看出,本设计已经达到了预期的设计目标,是一款有效的、经济的设计方案。
With the aggrandizement and development of the infrastructure, it is more and more high with the request of the quantity. Its quantity affects the infrastructure quantity directly. Using the concrete production equipment-automation control agitation station can guarantee the quantity of the concrete and raise the concrete production efficiency. Weight transmitter is a core module in the concrete of whole produce craft process. Highly precise weight transmitter is purpose of this thesis.The characteristics in this paper as follows:(l)The design is based on 24-Bit A/D Converter CS5532 of Cirrus Logic.The highly integrated △- ∑ Analog-to-Digital Converter uses charge-balance techniques to achieve 24-bit performance. High dynamoic range programmable output rates flexible power supply options and simple three-wire serial interface makes the ADC ideal solutions for weigh scale. CS5532 offer both self calibration and system calibration. The calibration can eliminate A/D zero error system channel error and drift error.(2) The hardware circuits with AD623 and potentiometer X9C103 develop programmable gain amplifier. Maxmal singnal range of weight transmitter input is 0 to 36mV.The AD623's gain is resistor programmed by X9C103, or more precisely whatever impedance appears between Pins 1 and 8.(3) A new drift correction algorithm of weight transmitter system is introduced. The drift of weight transmitter includes zero drift and gain drift. Drift correction algorithm perfectly resolves the drift problem practicely.Simulation experiments have been made. The results show that the performance of drift correction algorithm given in this paper is satisfying. The design is relatively high valuable in practice. It is proved to be relatively high effective.
引文
[1] 梁莉,田宇,黑新宏.搅拌站计算机控制系统的设计.广东自动化与信息工程,2001,(3):1-3.
[2] 王威.工业生产自动化.北京:科学出版社,2003.
[3] V.V. Athani, R. Vaswani. PC based electronic weighing system. Industry Applications Society Annual Meeting, Conference Record of the 1990 IEEE , 7-12 Oct. 1990,2:1856-1861.
[4] 施汉谦,宋文敏.电子秤技术.北京:中国计量出版社,1991.
[5] 王宪,张斌,须文波等.高精度料斗式定量控制系统.自动化仪表,2002,23(11):50-53.
[6] R. Vaswani. Electronic weighing system. M.Tech. Thesis, I. I. T. Bombay, 1988.
[7] H. J. Colijn. Weighing and proportioning of bulk solids. Trans. Tech. Publmn.Germany , 1975.
[8] U. Erden. Precision weighing-from Roman Steelyard to Microprocessor. Controll and instrument, 1984,16(3):43-45.
[9] 苏凯,刘庆国,陈国平.MCS-51系列单片机系统原理与设计.北京:冶金出版社,2003.
[10] 王泽兰,汪卫东,曲延滨等.基于AT89C52的多功能微机核子称设计.煤矿机械,2003,(12):11-12.
[11] 黄苑虹,梁慧冰.基于AT89C52的温度测控系统.仪表技术,2002,(1):27-28.
[12] 余永权.ATMEL89系列单片机应用技术.北京:北京航天航空大学出版社,2002.
[13] X25043/45 Programmable Watchdog Supervisory EEPROM. Xicor Inc.
[14] 安毅.基于GSM网络的分布式数据采集系统:(硕士学位论文).辽宁:大连理工大学,2004.
[15] 李纲,刘巍,于学敏.高速光耦6N135/6N136及其应用.电子技术应用,1996,(3):51-52.
[16] 阳宪惠.工业数据通信与控制网络.北京:清华大学出版社,2003.
[17] SYSMAC/CQM1可编程序控制器编程手册.1997.595-599.
[18] E.V. Sypin, E.S. Povernov, A.V. Terentiev et al. Electron Devices and Materials, 2003. Proceedings. 4th Annual 2003 Siberian Russian Workshop on, 1-4 July 2003:199-201.
[19] 张君,赵杰.仪表放大器AD623的性能与应用.仪表技术,2002,(5):45-46
[20] Single Supply Rail-to-Rail Low Cost Instrumentation Amplifier. Analog Devices Inc.
[21] 杨振江,孙占彪,王曙梅等.智能仪器与数据采集系统中的新器件及应用.西安:西安电子科技大学出版社,2001.
[22] Digitally Controlled Potentiometer X9C102/103/104/503. Xicor Inc.
[23] 刘元盛,李哲英,李维敏.数字电位器的应用特性分析.国外电子器件,2002,(7):14-16.
[24] 16-Bit and 24-Bit ADCs with Ultra Low Noise PGIA. Cirrus Logic Inc.
[25] 高明.24位模/数转换器CS5532及应用.仪表技术与传感器,2002,(7):40-42,46.
[26] 张中平.∑-△模数转换器的原理及应用.电子器件,2003,26(4):414-417.
[27] 刘勇,张龙,吴晓松.20位串行模数转换芯片CS5513及其应用.国外电子元器件,2002,(9):53-55.
[28] 王洪亮,易宇权,曹苏明等.串行20位ADC CS5513及其应用.微电子技术,2003,31(6):58-61.
[29] 宋强.用输出电压可变的三端稳压器设计直流稳压源.丹东纺专学校,2003,10(1):8-9
[30] LM317 3-Terminal Positive Adjustable Regulator. Fairchild Semiconductor Inc.
[31] 胡伟,季晓衡.单片机C程序设计及应用实例.北京:人民邮电出版社,2003.
[32] 张培仁.基于C语言编程MCS-51单片机原理与应用.北京:清华大学出版社,2003.
[33] 马忠梅,刘滨,戚军等.单片机C语言Windows环境编程宝典.北京:北京航空航天出版社,2003.
[34] 李卓涵.工业以太网I/O设备研制:(硕士学位论文).辽宁:大连理工大学,2004.
[35] 赖麒文.8051单片机C语言彻底应用.北京:科学出版社,2002.
[36] 先锋工作室.单片机程序设计实例.北京:清华大学出版社,2001.
[37] 何小阳.计算机监控原理及技术.重庆:重庆大学出版社,2003.
[38] AD-4325A Weighing Indicator Instruction Manual. A & D Company Ltd.
[39] 王幸之,王雷,翟成等.单片机应用系统抗干扰技术.北京:北京航空航天大学出版社,2000.
[40] 杨克俊.电磁兼容原理与设计技术.北京:人民邮电出版社,2004.
[2] 王威.工业生产自动化.北京:科学出版社,2003.
[3] V.V. Athani, R. Vaswani. PC based electronic weighing system. Industry Applications Society Annual Meeting, Conference Record of the 1990 IEEE , 7-12 Oct. 1990,2:1856-1861.
[4] 施汉谦,宋文敏.电子秤技术.北京:中国计量出版社,1991.
[5] 王宪,张斌,须文波等.高精度料斗式定量控制系统.自动化仪表,2002,23(11):50-53.
[6] R. Vaswani. Electronic weighing system. M.Tech. Thesis, I. I. T. Bombay, 1988.
[7] H. J. Colijn. Weighing and proportioning of bulk solids. Trans. Tech. Publmn.Germany , 1975.
[8] U. Erden. Precision weighing-from Roman Steelyard to Microprocessor. Controll and instrument, 1984,16(3):43-45.
[9] 苏凯,刘庆国,陈国平.MCS-51系列单片机系统原理与设计.北京:冶金出版社,2003.
[10] 王泽兰,汪卫东,曲延滨等.基于AT89C52的多功能微机核子称设计.煤矿机械,2003,(12):11-12.
[11] 黄苑虹,梁慧冰.基于AT89C52的温度测控系统.仪表技术,2002,(1):27-28.
[12] 余永权.ATMEL89系列单片机应用技术.北京:北京航天航空大学出版社,2002.
[13] X25043/45 Programmable Watchdog Supervisory EEPROM. Xicor Inc.
[14] 安毅.基于GSM网络的分布式数据采集系统:(硕士学位论文).辽宁:大连理工大学,2004.
[15] 李纲,刘巍,于学敏.高速光耦6N135/6N136及其应用.电子技术应用,1996,(3):51-52.
[16] 阳宪惠.工业数据通信与控制网络.北京:清华大学出版社,2003.
[17] SYSMAC/CQM1可编程序控制器编程手册.1997.595-599.
[18] E.V. Sypin, E.S. Povernov, A.V. Terentiev et al. Electron Devices and Materials, 2003. Proceedings. 4th Annual 2003 Siberian Russian Workshop on, 1-4 July 2003:199-201.
[19] 张君,赵杰.仪表放大器AD623的性能与应用.仪表技术,2002,(5):45-46
[20] Single Supply Rail-to-Rail Low Cost Instrumentation Amplifier. Analog Devices Inc.
[21] 杨振江,孙占彪,王曙梅等.智能仪器与数据采集系统中的新器件及应用.西安:西安电子科技大学出版社,2001.
[22] Digitally Controlled Potentiometer X9C102/103/104/503. Xicor Inc.
[23] 刘元盛,李哲英,李维敏.数字电位器的应用特性分析.国外电子器件,2002,(7):14-16.
[24] 16-Bit and 24-Bit ADCs with Ultra Low Noise PGIA. Cirrus Logic Inc.
[25] 高明.24位模/数转换器CS5532及应用.仪表技术与传感器,2002,(7):40-42,46.
[26] 张中平.∑-△模数转换器的原理及应用.电子器件,2003,26(4):414-417.
[27] 刘勇,张龙,吴晓松.20位串行模数转换芯片CS5513及其应用.国外电子元器件,2002,(9):53-55.
[28] 王洪亮,易宇权,曹苏明等.串行20位ADC CS5513及其应用.微电子技术,2003,31(6):58-61.
[29] 宋强.用输出电压可变的三端稳压器设计直流稳压源.丹东纺专学校,2003,10(1):8-9
[30] LM317 3-Terminal Positive Adjustable Regulator. Fairchild Semiconductor Inc.
[31] 胡伟,季晓衡.单片机C程序设计及应用实例.北京:人民邮电出版社,2003.
[32] 张培仁.基于C语言编程MCS-51单片机原理与应用.北京:清华大学出版社,2003.
[33] 马忠梅,刘滨,戚军等.单片机C语言Windows环境编程宝典.北京:北京航空航天出版社,2003.
[34] 李卓涵.工业以太网I/O设备研制:(硕士学位论文).辽宁:大连理工大学,2004.
[35] 赖麒文.8051单片机C语言彻底应用.北京:科学出版社,2002.
[36] 先锋工作室.单片机程序设计实例.北京:清华大学出版社,2001.
[37] 何小阳.计算机监控原理及技术.重庆:重庆大学出版社,2003.
[38] AD-4325A Weighing Indicator Instruction Manual. A & D Company Ltd.
[39] 王幸之,王雷,翟成等.单片机应用系统抗干扰技术.北京:北京航空航天大学出版社,2000.
[40] 杨克俊.电磁兼容原理与设计技术.北京:人民邮电出版社,2004.
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