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摘要传统的动态信号分析仪大多是基于硬件的，本课题研究的动态信号分析仪是在虚拟仪器的系统应用程序开发平台的基础上，联系传感器和计算机的知识，实现对信号的测量与分析功能。采集不同属性的动态信号后，通过LabVIEW开发的上位机软件管理平台，对采集的动态信号进行去噪处理，并实现对动态信号的电压、频率、信噪比、谐波失真等基本参数的测量、时域分析、频域分析等功能。本课题设计的动态信号分析仪人机交互性好，具有实际应用价值。26156
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本课题研究的动态信号主要包括音频信号、噪声信号和振动信号，动态信号分析仪的能够被广泛的应用于日常生活的声学测量、工程测量、工程故障信号分析以及高校实践教学的课程实验等领域。针对不同领域的应用，本课题从系统硬件的选型、传感器的选型、声卡的选型以及系统应用程序开发平台的选型入手，论证了不同功能和应用领域的动态信号分析仪的系统方案设计。着重介绍了基于计算机自身配置的声卡作为动态信号采集卡，通过LabVIEW的系统应用程序开发平台，对动态信号进行时域、频域等模块的分析，针对不同的信号分析不同的参数，增强了仪器的使用功能。
该系统设计巧妙利用计算机配置声卡代替传统的数据采集卡，通过声卡自身配置的D/A和A/D转换功能，结合虚拟仪器的技术优势，对动态信号进行可靠的采集和分析。
毕业论文关键词： LabVIEW 声卡数据采集 动态信号分析
Abstract
Traditional dynamic signal analyzers are mostly based on the hardware, dynamic signal analyzer is in the application of virtual instrument system development platform in this paper, on the basis of contact sensor technology and computer technology, achieve the function of the signal measurement and analysis. After collecting different characteristics of dynamic signal , through the PC software management platform LabVIEW, to deal with the noise of the dynamic signal acquisition, and realize the measurement of the voltage, frequency, SNR and harmonic distortion the basic parameters of the dynamic signal, such as, time domain, frequency domain analysis, etc. This paper designs a dynamic signal analyzer which has good man-machine interaction , has practical application value.
This paper researches the dynamic signal mainly include audio signal and noise signal and vibration signal, the study of the dynamic signal is very extensive both at home and abroad, dynamic signal analyzer can be widely applied in the daily life of the acoustic surveying, engineering surveying, engineering fault signal analysis and the practice teaching of the course experiment, etc. In view of the different areas of application, this paper starts from the selection of system hardware , sensor, sound card and system application development platform, the paper demonstrates the different function and application in the field of dynamic signal analyzer system design. Focusing on the sound card based on the configuration of the computer itself as a dynamic signal acquisition card, through the system application development platform of LabVIEW, to analyse the time domain and frequency domain module of the dynamic signal, analyse different parameters according to different signal, enhance the use function of the instrument.
The design ingeniously uses the configuration of computer sound card instead of the traditional data acquisition card, through D/A and A/D conversion function from the sound card configuration, combined with the technological advantages in LabVIEW，reliable and accurate analysis of dynamic signal acquisition.
Key Words: LabVIEW Sound card data acquisition Dynamic signal analysis
目 录
摘要 I
Abstract II
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