嵌入式频率特性分析仪的设计及实现  

Design and Realization of Embedded Frequency Characteristic Analyzer

作　　者：申军[1] 

机构地区：[1]海军装备研究院,北京100161

出　　处：《计算机测量与控制》2016年第8期310-312,共3页Computer Measurement &Control

摘　　要：为降低成本,实现测试仪器的数字化、集成化、多功能化,研究设计了基于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PC104CPU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,最后通过正弦相关分析法处理得到系统频率特性;实验结果表明测试波形与理论计算能较好吻合,具有较高的测量精度和响应速度;该分析仪人机界面友好,操作简单,具有较大实用价值。To reduce cost and achieve digital, integrated and multifunctional, an embedded frequency characteristic analyzer is designed, based on FPGA and adopts the idea of virtual instrument and takes 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 re- sponse, also makes storage in system. The analyzer gets the system frequency characteristic through sinusoidal correlation analysis process. Results show that testing waveform compares favorably with theoretical calculated one and the instrument owns high measuring accuracy and speed. The analyzer has friendly man-machine interface, simply operation and wide application.

关 键 词：正弦相关分析法 频率特性分析仪 PC104 FPGA 

分 类 号：TM935[电气工程—电力电子与电力传动]