1、 I 低频信号分析仪软件设计与实现 摘要摘要：随着微电子技术，计算机技术，网络通讯技术和软件技术的高速发展，在实验 室和工业应用中，传统仪器开始向计算机化的方向发展。通过串口将信号经过传输和 采样到电脑里面由设计的软件实现对信号时域和频域的分析和计算是会给教学和科 研带来很多意想不到的方便。本次设计使用 Visual C+ 6.0 完成对串口模块的设计， 使其能够实现信号的接收。然后通过 MATLAB 生成信号，通过对生成的信号进行傅立 叶变换，由傅氏变换可以得到幅值()Af和相角()f，然后通过计算得到的特征值， 将信号的频谱，时间域波形等显示出来。由波形图和频谱图分析得知信号的周期，峰 峰
2、值，频率等，从而实现对信号进行分析和计算。虽然本次毕业设计虽然能够基本完 成设计要求，但是还有很多地方需要改进。 关键字关键字： 串行通信；信号采样；傅立叶变换；信号分析 II Low Frequency Signal Analyzer Software Design and Implementation Abstract: With the micro-electronics technology, computer technology, network communication technology and the rapid development of software techn
3、ology in the laboratory and industrial applications, the traditional start to the computerized equipment direction. The signal through the serial port to a computer through transmission and sampling by the design of the software inside the signal in time domain and frequency domain of analysis and c
4、omputation is teaching and research will bring a lot of unexpected convenience. This design using Visual C + + 6.0 serial port module to complete the design, so that it can achieve signal reception. Then MATLAB generated signal, the signal generated by the Fourier transform, Fourier transform can be
5、 obtained from the amplitude and phase angle, and then calculated the eigenvalues of the signal spectrum, time domain waveform display. By the waveform and spectrum analysis showed that the signal cycle, peak to peak, frequency, etc., in order to achieve the signal analysis and calculation. While this can basically complete the graduation project design requirements though, but there are many areas for improvement. Keywords: serial communication; signal sampling; Fourier transform; signal analysis III 目录目录 摘要摘要 I ABSTRACTABSTRACT
