双路低频信号发生及分析仪的设计

本系统以一块STC12C5A60S2单片机为主控制器,辅以另一块同型号单片机,用于产生两路幅度、相位、频率、占空比等参量可预置的信号;通过加法器将双路信号进行叠加;经采样将信号送入MSP430单片机进行FFT快速傅氏变换运算,在频域内对波形信号的各个频率分量以及幅度等进行分析处理;通过单片机之间的串口通信将处理结果送回主控制器并通过LCD液晶进行结果显示。

In the system, a STC12C5A60S2 MCU as the main controller, supplemented by another piece of the same type of SCM, to generate two signals whose amplitude,phase, frequency, duty ratio and other parameters can be preset. Dual arbitrary superposition of the signal can be achieved through the adder, then by sampling, the sampling signal is sent to the MSP430 MCU to take FFT Fast Fourier transform operation, so we can analyze and process the frequency components and amplitude of the waveform signals in the frequency domain, and then through the serial communication of between the MCU, the results are sent to the main controller and are showed by LCD liquid crystal display.