嵌入式频率特性分析仪的设计及实现

Design and Realization of Embedded Frequency Characteristic Analyzer Based on PC104

摘要:

研究设计基于PC104和FPGA的嵌入式频率特性分析仪。该分析仪采用虚拟仪器的概念,以PC104 CPU为主控单元,通过FPGA控制D/A、A/D芯片时序,输出全频率范围内的正弦波并采样存储系统激励信号及输出响应,最后通过CPU算法处理得到系统频率特性。实验结果表明：该仪器人机界面友好,测量速度快,测试波形与理论计算波形能较好吻合。

Abstract:

The embedded frequency characteristic analyzer based on FPGA adopts the idea of virtual instrument and uses PC104 CPU as the main control unit. By realizing sequential control of D/A and A/D chips via FPGA, the analyzer outputs sine wave among all frequency range, samples the exciting signal as well as output response, also makes storage in system. The analyzer gets the system frequency characteristic through CPU algorithm processing. The research result shows, the instrument has a friendly man-machine interface and a high measuring speed. The testing waveform compares favorably with the theoretical calculated one.