核磁共振找水仪室内检测标定装置设计
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摘要
根据对核磁共振找水仪实验系统的要求及对核磁共振找水仪的室内实验环境电磁噪声进行分析,设计出一种能够在室内模拟野外实验条件,在一定程度上检测仪器功能是否正常的检测方法和装置。实现了在实验室内模拟野外条件,对核磁共振找水仪的性能指标进行测试和标定,加速了核磁共振找水仪野外噪声抑制等关键技术的研发,使每一台核磁共振找水仪在进行野外工作前进行充分地测试,以保证仪器野外工作的稳定性和可靠性,提高野外工作效率,降低野外工作成本。
本设计包括核磁共振模拟信号发生器,屏蔽盒及上位机软件等几个主要模块。装置在室内产生核磁共振模拟信号,然后核磁找水仪检测经过衰减器和空间线圈衰减的信号,测得的数据送到上位机处理,将得到的结果同初始设置的关键参数进行对比,从而对核磁共振找水仪的放大器及采集模块的准确度进行调校。该装置进行过多次室内实验,可以实现长时间连续稳定工作,通过对实验结果的详细分析,验证了装置具有良好的稳定性和准确性。
Water is one of the most valuable natural resources for the survival of human being. To solve the water crisis, high-tech investigation of groundwater has become an urgent task. Currently, the only direct detection of groundwater is the ground geophysical methods MRS. However environment electromagnetic noise (1 kHz to 3 kHz) influence the MRS water detector significantly, in particular in indoor detection. This paper firstly introduces the demands of MRS instrument for indoor detection and then analyzes the electromagnetic noise, to provide equipment that can detect whether the function of MRS instrument is normal and a detected method in the simulation of the field in the indoor experimental conditions. This equipment can detect and calibrate the MRS instrument system. The design includes some main module, such as analog MRS signal generator, electromagnetic shield box and upper computer software. First the equipment generates the analog MRS signal, then MRS instrument detects the signal that has attenuated by resistances and space coils. Finally the computer gets the data then compares results with the parameters that have set before; thereby we can proof the accuracy of the amplifier and collection cards.
This thesis included seven chapters and it introduces the indoor detection and calibration equipment in detail.
Chapter 1 is the introduction. Firstly, stated the theory of magnetic resonance sounding (MRS). Secondly, it analyzed the development of domestic and overseas researches, finally gives the content and meaning of the paper.
Chapter 2 is the design of the overall structure of the indoor detection and calibration equipment. The overall design scheme of the equipment is given according to the function.
Chapter 3 is the design of the analog MRS signal generator. It stated the design of the main chips interface, memory address assignment, and communication module and communication protocol in detail.
Chapter 4 is the design of the electromagnetic shield box, it introduced characteristics of the electromagnetic shielding, choose of shielding material and design of the inter frame. At last it gave the tests of electromagnetic shield effect.
Chapter 5 is the design of the upper computer software. It mainly stated the function of upper computer software, the design thought and the operation of software.
Chapter 6 is mainly about a lot of indoor tests for the self-detection mode, the key parameters calibration mode, and the testing capacity of amplifier and collection cards. Finally, analyzed and explained the results of tests.
Chapter 7 is the conclusion of this paper, summarized the research and look forward to the future work.
Through system testing, the indoor testing and calibration equipment prototype is normal working, stability and accurate measuring, which achieved the expected objective of the basic design.
本设计包括核磁共振模拟信号发生器,屏蔽盒及上位机软件等几个主要模块。装置在室内产生核磁共振模拟信号,然后核磁找水仪检测经过衰减器和空间线圈衰减的信号,测得的数据送到上位机处理,将得到的结果同初始设置的关键参数进行对比,从而对核磁共振找水仪的放大器及采集模块的准确度进行调校。该装置进行过多次室内实验,可以实现长时间连续稳定工作,通过对实验结果的详细分析,验证了装置具有良好的稳定性和准确性。
Water is one of the most valuable natural resources for the survival of human being. To solve the water crisis, high-tech investigation of groundwater has become an urgent task. Currently, the only direct detection of groundwater is the ground geophysical methods MRS. However environment electromagnetic noise (1 kHz to 3 kHz) influence the MRS water detector significantly, in particular in indoor detection. This paper firstly introduces the demands of MRS instrument for indoor detection and then analyzes the electromagnetic noise, to provide equipment that can detect whether the function of MRS instrument is normal and a detected method in the simulation of the field in the indoor experimental conditions. This equipment can detect and calibrate the MRS instrument system. The design includes some main module, such as analog MRS signal generator, electromagnetic shield box and upper computer software. First the equipment generates the analog MRS signal, then MRS instrument detects the signal that has attenuated by resistances and space coils. Finally the computer gets the data then compares results with the parameters that have set before; thereby we can proof the accuracy of the amplifier and collection cards.
This thesis included seven chapters and it introduces the indoor detection and calibration equipment in detail.
Chapter 1 is the introduction. Firstly, stated the theory of magnetic resonance sounding (MRS). Secondly, it analyzed the development of domestic and overseas researches, finally gives the content and meaning of the paper.
Chapter 2 is the design of the overall structure of the indoor detection and calibration equipment. The overall design scheme of the equipment is given according to the function.
Chapter 3 is the design of the analog MRS signal generator. It stated the design of the main chips interface, memory address assignment, and communication module and communication protocol in detail.
Chapter 4 is the design of the electromagnetic shield box, it introduced characteristics of the electromagnetic shielding, choose of shielding material and design of the inter frame. At last it gave the tests of electromagnetic shield effect.
Chapter 5 is the design of the upper computer software. It mainly stated the function of upper computer software, the design thought and the operation of software.
Chapter 6 is mainly about a lot of indoor tests for the self-detection mode, the key parameters calibration mode, and the testing capacity of amplifier and collection cards. Finally, analyzed and explained the results of tests.
Chapter 7 is the conclusion of this paper, summarized the research and look forward to the future work.
Through system testing, the indoor testing and calibration equipment prototype is normal working, stability and accurate measuring, which achieved the expected objective of the basic design.
引文
[1]潘玉玲.地面核磁共振找水理论和方法[M].武汉:中国地质出版社,2000.
[2]张荣,胡祥云等.地面核磁共振技术发展评述.地球物理学进展,2006.3
[3]潘玉玲,万乐,袁照令,李振宇.核磁共振找水方法的现状和发展趋势.地址科技情报[J].2000,3(19):105.108.
[4]邹家衡.核磁共振找水方法[J].铀矿地质,1999,1(15):62.64.
[5]王金山.核磁共振波谱仪与实验技术[M].北京:机械工业出版社,1982,6.
[6]孙淑琴,林君,张庆文.氢质子弛豫过程[J].物探与化探,2005,29(2):153.156.
[7]王宝祥.信号与系统[M].哈尔滨:哈尔滨工业大学出版社,2004.
[8]潘玉玲,张昌达.地面核磁共振找水理论和方法[M].武汉:中国地质大学出版社,2000.
[9]刘圣才,李春葆.Visual Basic 6.0程序设计导学[M].北京:清华大学出版社.2002.
[10]王福成,周铁柱,黄淼云.Visual Basic 6.0数据库开发指南[M].北京:清华大学出版社,2000.
[11] [美] Texas Instruments Incorporated. TI DSP集成化开发环境使用手册[M].北京:清华大学出版社,2006.
[12] [美] Texas Instruments Incorporated. TMS320C6000系列DSP编程工具与指南[M].北京:清华大学出版社,2006.
[13]陈文升.核磁共振地球物理仪器原理[M].地质出版社,1992.
[14]计丹,黄光明,霍环利.TLV320AIC23 CODEC与DSP的接口应用[J].电声技术,2002(10):39.41.
[15]肖博爱,周慧玲.基于DSP的标准源设计[J].国外电子测量技术,2007(2):76.82.
[16]严国萍,徐敬忠.TMS320VC5402与TLV320AIC23在数字音效系统中的接口设计[J].电声技术,2007(2):39.41.
[17]张成鹤,王平,郑林华.可编程多协议收发器MAX3160的原理与应用[J].国外电子测量技术,2002(12):62.64.
[18]皮小平,吕宗伟.TL16C754在多串口扩展中的应用[J].电子元器件应用,2006(3):63.66.
[19]章云.DSP控制器及其应用[M].北京:机械工业出版社,2001.
[20] TMS320C6000 DSP 32.bit Timer Reference Guide.(Rev.A)[M].
[21] TMS320C6000 DSP EMIF Reference Guide.(Rev.B)[M].
[22] TMS320C6000 DSP GPIO Reference Guide.(Rev.A)[M].
[23] TMS320C6000 DSP McASP Reference Guide.(Rev.C)[M].
[24]康华光,陈大钦.电子技术基础模拟部分(第四版)[M].北京:高等教育出版社,2003.
[25] Nicolet《动态信号分析仪操作手册》
[26]徐福平,冯晨,王以伦,邓宝林.电磁屏蔽技术与结构设计[J].应用科技,2005(11):28.33.
[27]张忠海.电子设备电磁屏蔽的结构设计[J].机械与电子,2005(5):74.76.
[28]李雪,刘泰康,姜云.电磁屏蔽技术分析[J].电子工艺技术,2007(1):49.51.
[29]张小林,徐精华.趋肤效应下传输线高频交流电阻的分析[J].江西科学,2008(12):873.875.
[30]电磁场、电磁理论、电磁环境[J].电子科技文摘,2006(4):67.68.
[31]谭浩强.C程序设计[M].北京:清华大学出版社,1991.
[32]邹利群,毕文辉.电子测量中的屏蔽技术[J].仪器仪表用户,2006(1):109.110.
[33]林国荣.电磁干扰及控制[M].电子工业出版社,2003.
[34]王守三.电磁兼容的使用技术、技巧和工艺[M].北京:机械工业出版社,2007.
[35] Yaramanci, U ,New technologies in ground water exploration; surface nuclear magnetic resonance, Geologica Acta, vol.2, no.2, pp.109-120, 2004.
[36] Mohnke, O; Braun, M; Yaramanci, U, Inversion of decay time spectra from surface NMR data, Protokoll ueber das Kolloquium Elektromagnetische Tiefenforschung, vol. 19, pp.78-81, 2001.
[37] Descloitres, Marc; Ruiz, Laurent; Sekhar, M; Legchenko, Anatoly; Braun, Jean-Jacques; Mohan Kumar, M S; Subramanian, S, Characterization of seasonal local recharge using electrical resistivity tomography and magnetic resonance sounding. Hydrological Processes, vol. 22, no. 3, pp.384-394, 30 Jan 2008.
[2]张荣,胡祥云等.地面核磁共振技术发展评述.地球物理学进展,2006.3
[3]潘玉玲,万乐,袁照令,李振宇.核磁共振找水方法的现状和发展趋势.地址科技情报[J].2000,3(19):105.108.
[4]邹家衡.核磁共振找水方法[J].铀矿地质,1999,1(15):62.64.
[5]王金山.核磁共振波谱仪与实验技术[M].北京:机械工业出版社,1982,6.
[6]孙淑琴,林君,张庆文.氢质子弛豫过程[J].物探与化探,2005,29(2):153.156.
[7]王宝祥.信号与系统[M].哈尔滨:哈尔滨工业大学出版社,2004.
[8]潘玉玲,张昌达.地面核磁共振找水理论和方法[M].武汉:中国地质大学出版社,2000.
[9]刘圣才,李春葆.Visual Basic 6.0程序设计导学[M].北京:清华大学出版社.2002.
[10]王福成,周铁柱,黄淼云.Visual Basic 6.0数据库开发指南[M].北京:清华大学出版社,2000.
[11] [美] Texas Instruments Incorporated. TI DSP集成化开发环境使用手册[M].北京:清华大学出版社,2006.
[12] [美] Texas Instruments Incorporated. TMS320C6000系列DSP编程工具与指南[M].北京:清华大学出版社,2006.
[13]陈文升.核磁共振地球物理仪器原理[M].地质出版社,1992.
[14]计丹,黄光明,霍环利.TLV320AIC23 CODEC与DSP的接口应用[J].电声技术,2002(10):39.41.
[15]肖博爱,周慧玲.基于DSP的标准源设计[J].国外电子测量技术,2007(2):76.82.
[16]严国萍,徐敬忠.TMS320VC5402与TLV320AIC23在数字音效系统中的接口设计[J].电声技术,2007(2):39.41.
[17]张成鹤,王平,郑林华.可编程多协议收发器MAX3160的原理与应用[J].国外电子测量技术,2002(12):62.64.
[18]皮小平,吕宗伟.TL16C754在多串口扩展中的应用[J].电子元器件应用,2006(3):63.66.
[19]章云.DSP控制器及其应用[M].北京:机械工业出版社,2001.
[20] TMS320C6000 DSP 32.bit Timer Reference Guide.(Rev.A)[M].
[21] TMS320C6000 DSP EMIF Reference Guide.(Rev.B)[M].
[22] TMS320C6000 DSP GPIO Reference Guide.(Rev.A)[M].
[23] TMS320C6000 DSP McASP Reference Guide.(Rev.C)[M].
[24]康华光,陈大钦.电子技术基础模拟部分(第四版)[M].北京:高等教育出版社,2003.
[25] Nicolet《动态信号分析仪操作手册》
[26]徐福平,冯晨,王以伦,邓宝林.电磁屏蔽技术与结构设计[J].应用科技,2005(11):28.33.
[27]张忠海.电子设备电磁屏蔽的结构设计[J].机械与电子,2005(5):74.76.
[28]李雪,刘泰康,姜云.电磁屏蔽技术分析[J].电子工艺技术,2007(1):49.51.
[29]张小林,徐精华.趋肤效应下传输线高频交流电阻的分析[J].江西科学,2008(12):873.875.
[30]电磁场、电磁理论、电磁环境[J].电子科技文摘,2006(4):67.68.
[31]谭浩强.C程序设计[M].北京:清华大学出版社,1991.
[32]邹利群,毕文辉.电子测量中的屏蔽技术[J].仪器仪表用户,2006(1):109.110.
[33]林国荣.电磁干扰及控制[M].电子工业出版社,2003.
[34]王守三.电磁兼容的使用技术、技巧和工艺[M].北京:机械工业出版社,2007.
[35] Yaramanci, U ,New technologies in ground water exploration; surface nuclear magnetic resonance, Geologica Acta, vol.2, no.2, pp.109-120, 2004.
[36] Mohnke, O; Braun, M; Yaramanci, U, Inversion of decay time spectra from surface NMR data, Protokoll ueber das Kolloquium Elektromagnetische Tiefenforschung, vol. 19, pp.78-81, 2001.
[37] Descloitres, Marc; Ruiz, Laurent; Sekhar, M; Legchenko, Anatoly; Braun, Jean-Jacques; Mohan Kumar, M S; Subramanian, S, Characterization of seasonal local recharge using electrical resistivity tomography and magnetic resonance sounding. Hydrological Processes, vol. 22, no. 3, pp.384-394, 30 Jan 2008.