摘要
利用现场可编程逻辑门阵列(FPGA)、数模转换(DAC)电路和电荷转换电路设计了电荷信号发生器,采用直接数字频率合成(DDS)技术实现了信号的调频、调幅、调相,同时详细阐述了DDS技术的工作原理及模拟电路的设计思路。在Modelsim软件平台下,对程序进行了功能仿真,并调用SignalTap Ⅱ逻辑分析仪捕获显示实时信号,仿真结果和捕获的实际波形证明了程序的正确性。将电压信号转换为电荷信号,并与电荷转换器、调理放大器联调,经测试输出波形达到技术要求,证明了电荷信号发生器的有效性和可靠性。电荷信号发生器可以作为标准的信号源应用于松脱部件和振动监测系统的安装调试和核电厂大修检查。
The charge signal generator was designed by using Field Programmable Logic Gate Array(FPGA),Digital to Analog Conversion (DAC)circuit and charge conversion circuit.The Direct Digital Frequency Synthesis (DDS)was used to realize the frequency modulation,amplitude modulation and phase modulation of the signal.At the same time,the operating principle of the DDS technology and the design ideas of the analog circuit were described in detail.Under the Modelsim software platform,the function simulation of the program was carried out,and the real-time signal was captured and displayed by the SignalTap II logic analyzer.The correctness of the program was proved by the simulation results and the actual waveform.The voltage signal was converted into the charge signal,and joint debugging with the charge converter and the conditioning amplifier.Tests showed that the output waveform can meet the design specification and this proves the validity and reliability of the charge signal generator.The charge signal generator can be used as a standard signal source for the installation and commissioning of loose parts and vibration monitoring system,and it can be used for overhaul inspection of nuclear power stations.
作者
王磊
李翔
胡建荣
Wang Lei;Li Xiang;Hu Jianrong(Nuclear Power Institute of China,Chengdu,610213,China)
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2018年第6期182-185,共4页
Nuclear Power Engineering
