摘要
针对战略性先导科技专项(TMSR)熔盐堆保护系统中,对接收到的信号需要有较高的数据转换精度,并且保护系统中的元器件具有一定的抗辐射能力的目的;文章采用了16位串行微功耗、高速、高精度ADS8325芯片和ACTEL公司开发基于Flash技术的具有抗辐射性能的现场可编程门阵列FPGA,设计了熔盐堆保护系统中关键的A/D转换和定值比较单元;整个设计方案用Verilog HDL硬件描述语言实现,并在Libero平台下进行软件编程实现A/D转换的工作时序和定值比较的控制;测试结果表明,ADS8325对快速变化的输入信号反映灵敏、准确稳定、可靠,达到熔盐堆保护系统A/D转换和定值比较的要求。
For the protection system of Thorium--based Molten--Salt Reactor (TMSR) nuclear energy system which is one of the strate- gic priority research program of CAS, the received signal is required to keep a high data conversion precision, and the components of protection system with quantified radiation performance are required. In this study, 16 bits serial ADS8325 chip with micro power consumption, high speed and high precision ACTEL FPGA with quantified radiation performance based on Flash techIlology. The key of the A/D conver- sion and fixed value comparison unit of TMSR protection system are designed. The entire design is realized by Verilog HDL, A/D conversion sequence and fixed value control are realized by software programming under Libero platform. Test results show that ADS8325 is accurate and stable and reliable for input signal, achieving the constant value comparison function.
出处
《计算机测量与控制》
2015年第3期886-888,共3页
Computer Measurement &Control
基金
中国科学院战略性先导科技专项(XD02001003)