基于LPC1768信号采集与频谱分析装置研究

Research on Signal Acquisition and Spectrum Analysis Device Based on LPC1768

为能对磁场干扰进行测试,需要实时的对磁通门传感器检测到的多路磁场信号进行分析,由此设计出一款基于LPC1768单片机的动态信号采集和频谱分析的装置。利用LPC1768单片机的高速数据处理能力以及大容量处理器,结合AD7606搭建信号采集硬件电路,解决多路信号高速采集问题。频谱分析方面采用快速傅里叶变换,信号采用串口传输和网络传输两种方式至上位机,在QT平台采用C++语言中开发界面显示磁场数据动态的时域图和频域图,从而对设备的性能进行跟踪评估,具有较高的实用价值。

In order to test the magnetic field interference, it is necessary to analyze the multi-channel magnetic field signals detected by the fluxgate sensor in real time, and design a device based on LPC1768 single-chip microcomputer for dynamic signal acquisition and spectrum analysis. Utilizing the high-speed data processing capability of LPC1768 microcontroller and large-capacity processor, combined with AD7606 to build signal acquisition hardware circuit, solve the problem of highspeed acquisition of multi-channel signals. In the spectrum analysis, the fast Fourier transform is adopted, and the signal is serial port transmission and network transmission to the upper computer. In the QT platform, the C++ language development interface is used to display the dynamic time domain map and the frequency domain map of the magnetic field data,thereby The performance is tracked and evaluated, which has high practical value.