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| 核磁共振地下水探测系统信号源的研制 | |
| 引用本文： | 赵义平,王春民,吴海燕,聂彩霞,董磊.核磁共振地下水探测系统信号源的研制[J].吉林大学学报(信息科学版),2011,29(4):289-295. |
| 作者姓名： | 赵义平 王春民 吴海燕 聂彩霞 董磊 |
| 作者单位： | 1.水利部牧区水利科学研究所,呼和浩特 010105；2.长春理工大学光电信息学院 ,电子工程分院,长春130061；3.九江精密测试技术研究所,江西 九江 332000；4.长春科技创业服务中心,长春 130012 |
| 基金项目： | “十一五”国家科技支撑计划重大基金资助项目(2006BAK03A23);吉林省科技支撑计划基金资助项目(20080338) |
| 摘 要： | 为模拟产生MRS(Magnetic Resonance Sounding)信号研制JLMRS地下水探测系统,设计了核磁共振信号源,模拟MRS信号,方便JLMRS地下水探测系统室内测试.针对实际MRS信号幅度小,频率分辨率高等特点,信号源硬件采用DDS(Direct Digital Synthesizer)技术,CPLD... |
| 关 键 词： | 地面核磁共振 地下水 信号源 直接数字频率合成器 |
Development of Magnetic Resonance Sounding Signal Generator for Groundwater Detector |
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| ZHAO Yi-ping,WANG Chun-min,WU Hai-yan,NIE Cai-xia,DONG Lei.Development of Magnetic Resonance Sounding Signal Generator for Groundwater Detector[J].Journal of Jilin University:Information Sci Ed,2011,29(4):289-295. | |
| Authors: | ZHAO Yi-ping WANG Chun-min WU Hai-yan NIE Cai-xia DONG Lei |
| Institution: | 1.Institute of Water Resources for Pastoral Area,Huhhot 010105,China; 2.Electronic Engineering Academy,College of Optical and Electronical Information Changchun University of Science and Technology|Changchun 130061,China; 3.Jiujiang Precision Measuring Technology Research Institute,Jiujiang 332000,China; 4.Changchun Hi Tech Innovation Servce Center,Changchun 130012,China |
| Abstract: | Generator that can generate the MRS(Magnetic Resonance Sounding) signal is design to develop JLMRS groundwater detection system.It is convenient to indoor testing of JLMRS groundwater detection system using simulate MRS(Magnetic Resonance Sounding) signal.Due to the low amplitude and high-resolution frequency of MRS signal,the hardware of generator is based on the principle of DDS(Direct Digital Synthesizer).The phase accumulator is programmed by CPLD(Complex Programble Logic Device),the MRS signal data is calculated by Matlab,and then stored in the non-volatile RAM(Random Access Memory),which can save data after power down,so it is not necessary to repeat downloading.This generator can adjust the amplitude,frequency,delay time constant,and phase of the MRS signal,and it can be added in various noises of different SNR(Singnal to Noise Ratio).It has been authorized the national utility model patent(200820072674.2),and was already used in the development of the JLMRS groundwater detection system.It is testified that the amplitude error is lower than 0.02 V,the frequency resolution is 1 Hz,the output is stabilization,can be used repeatedly,and meets the demands of the JLMRS water investigation instrument. |
| Keywords: | magnetic resonance sounding groundwater signal generator direct digital synthesizer(DDS) |
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