一维震源定位论文.doc
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一维震源定位论文,摘要 管道运输是一种重要的运输方式，但是由于长时间的运行磨损以及各种自然因素和人为因素，会导致管道的泄漏，造成资源浪费、环境污染和经济损失。因此，及时有效地确定管道的泄漏点，是确保运输安全的重要方式之一。本文针对课程设计的课题所描述的情境，针对具体实验器材labview虚拟仪器和ni scxi 1531采集加速度信号，...
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摘 要
管道运输是一种重要的运输方式，但是由于长时间的运行磨损以及各种自然因素和人为因素，会导致管道的泄漏，造成资源浪费、环境污染和经济损失。因此，及时有效地确定管道的泄漏点，是确保运输安全的重要方式之一。本文针对课程设计的课题所描述的情境，针对具体实验器材LabVIEW虚拟仪器和NI SCXI 1531采集加速度信号，，仿真模拟对气体管道泄漏点的进行定位。
利用MATLAB软件，运用信号分析与处理的基本方法，尝试解决所提出的问题。主要为是用傅里叶变换对采集的信号进行频域分析；利用高通滤波器，对采集的信号进行高通滤波用互相关方法计算信号的相对延迟时间，并计算出振源的位置
一维振源定位方法比较有效的是相关分析法，本文正式基于此，通过多次实验，通过上述的步骤，统计分析所得实验数据，最后排除可能是有人为好仪器误差引起的不准确的数据，通过值得信任的数据进行统计分析，最后通过距离计算振源信号波在实验器材上（介质）的传播速度，并利用另一组数据来检验其是否正确，最后通过实验证明本方法确实有用，最后计算的结果和时间的在误差允许内是一致的。
关键词： 振源定位; 相关分析法 ; 傅里叶变换；高通滤波
ABSTRACT
Pipeline transport is an important mode of transportation, but because of long time running wear and all kinds of natural factors and human factors, will lead to a leakage of pipeline, resulting in waste of resources, environmental pollution and economic losses. Therefore, to determine the pipeline leak in a timely and effective manner, is one of the important ways to ensure transportation safety. Curriculum design topic, the author of this paper describes situation, LabVIEW virtual instrument for specific experimental equipment and NI SCXI 1531 collected acceleration signal, the simulation of gas pipeline leak location.
Using MATLAB software, and using the basic methods of signal analysis and processing, try to solve the issues raised. Mainly is to use Fourier transform to sampled signal frequency domain analysis; Acquisition of signals to make use of high-pass filter, high pass filter using cross-correlation method to calculate the relative delay time of signal, and calculates the vibration source location
One-dimensional vibration source location method is more effective is correlation analysis, this paper formally based on this, through the experiment many times, through the above steps, the statistical analysis of experimental data obtained finally ruled out may be a good instrument for error caused by inaccurate data, through trusted data statistical analysis, and finally through the signal wave in the distance calculation source experiment equipment (medium) on the velocity of propagation, and another set of data is used to test whether it is correct, the experiments prove that this method is indeed useful, the final calculation of the results and time within the permitted error is the same.
Key words：Source localization; Correlation analysis; Fourier transform; High-pass filte
目录
摘 要 I
ABSTRACT II
1.绪 论 1
1.1 选题背景和意义 1
1.2 研究现状 1
2. 虚拟仪器技术LabVIEW 2
2.1 虚拟仪器技术简介 2
2.2开发流程 4
2.3本系统所用的LabVIEW 5
2.4 NI SCXI 1531功能说明 6
2.5运行环境综合分析 8
2.6系统软硬件分析 9
2.6.1系统软件分析 9
2.6.2系统硬件分析 9
3.振源定位原理与方案 9
3.1振源定位的具体情形假 9
3.2振源定位原理综述 11
3.2.1相关分析法 11
3.2.2时间序列分析法 12
3.2.3小波变换法 12
3.3相关分析法的可行性 13
3.3.1数据采集 15
3.3.2数据处理 15
4. 基于相关分析法在振源定位的设计 17
4.1总体实现框图 18
4.2获取输入信号 19
4.3傅里叶频域分析模块 19
4.4滤波模块 24
4.5求时差模块 27
4.4统计分析 29
5. 基于基于matlab的仿真实现 29
5.1仿真程序结果展示 29
5.2仿真程序结果统计分析 32
5.3总结 34
结论 34
参考文献 35
致谢 37
附录 38
管道运输是一种重要的运输方式，但是由于长时间的运行磨损以及各种自然因素和人为因素，会导致管道的泄漏，造成资源浪费、环境污染和经济损失。因此，及时有效地确定管道的泄漏点，是确保运输安全的重要方式之一。本文针对课程设计的课题所描述的情境，针对具体实验器材LabVIEW虚拟仪器和NI SCXI 1531采集加速度信号，，仿真模拟对气体管道泄漏点的进行定位。
利用MATLAB软件，运用信号分析与处理的基本方法，尝试解决所提出的问题。主要为是用傅里叶变换对采集的信号进行频域分析；利用高通滤波器，对采集的信号进行高通滤波用互相关方法计算信号的相对延迟时间，并计算出振源的位置
一维振源定位方法比较有效的是相关分析法，本文正式基于此，通过多次实验，通过上述的步骤，统计分析所得实验数据，最后排除可能是有人为好仪器误差引起的不准确的数据，通过值得信任的数据进行统计分析，最后通过距离计算振源信号波在实验器材上（介质）的传播速度，并利用另一组数据来检验其是否正确，最后通过实验证明本方法确实有用，最后计算的结果和时间的在误差允许内是一致的。
关键词： 振源定位; 相关分析法 ; 傅里叶变换；高通滤波
ABSTRACT
Pipeline transport is an important mode of transportation, but because of long time running wear and all kinds of natural factors and human factors, will lead to a leakage of pipeline, resulting in waste of resources, environmental pollution and economic losses. Therefore, to determine the pipeline leak in a timely and effective manner, is one of the important ways to ensure transportation safety. Curriculum design topic, the author of this paper describes situation, LabVIEW virtual instrument for specific experimental equipment and NI SCXI 1531 collected acceleration signal, the simulation of gas pipeline leak location.
Using MATLAB software, and using the basic methods of signal analysis and processing, try to solve the issues raised. Mainly is to use Fourier transform to sampled signal frequency domain analysis; Acquisition of signals to make use of high-pass filter, high pass filter using cross-correlation method to calculate the relative delay time of signal, and calculates the vibration source location
One-dimensional vibration source location method is more effective is correlation analysis, this paper formally based on this, through the experiment many times, through the above steps, the statistical analysis of experimental data obtained finally ruled out may be a good instrument for error caused by inaccurate data, through trusted data statistical analysis, and finally through the signal wave in the distance calculation source experiment equipment (medium) on the velocity of propagation, and another set of data is used to test whether it is correct, the experiments prove that this method is indeed useful, the final calculation of the results and time within the permitted error is the same.
Key words：Source localization; Correlation analysis; Fourier transform; High-pass filte
目录
摘 要 I
ABSTRACT II
1.绪 论 1
1.1 选题背景和意义 1
1.2 研究现状 1
2. 虚拟仪器技术LabVIEW 2
2.1 虚拟仪器技术简介 2
2.2开发流程 4
2.3本系统所用的LabVIEW 5
2.4 NI SCXI 1531功能说明 6
2.5运行环境综合分析 8
2.6系统软硬件分析 9
2.6.1系统软件分析 9
2.6.2系统硬件分析 9
3.振源定位原理与方案 9
3.1振源定位的具体情形假 9
3.2振源定位原理综述 11
3.2.1相关分析法 11
3.2.2时间序列分析法 12
3.2.3小波变换法 12
3.3相关分析法的可行性 13
3.3.1数据采集 15
3.3.2数据处理 15
4. 基于相关分析法在振源定位的设计 17
4.1总体实现框图 18
4.2获取输入信号 19
4.3傅里叶频域分析模块 19
4.4滤波模块 24
4.5求时差模块 27
4.4统计分析 29
5. 基于基于matlab的仿真实现 29
5.1仿真程序结果展示 29
5.2仿真程序结果统计分析 32
5.3总结 34
结论 34
参考文献 35
致谢 37
附录 38
