【作者】 陈雷；

【导师】 王文理；

【作者基本信息】 河北大学 ， 通信与信息系统， 2005， 硕士

【摘要】 随着通信技术和计算机技术的广泛应用,电力部门的大多数变电站需要的维护、值守部门已经不多,因而小门数、可靠性高、低成本的数字交换系统有着较好的市场前景。近几年来,超大规模集成电路的生产技术不断提高并且被广泛使用,以前成本很高的集成芯片已经普遍应用到了中小规模的系统中。因此,开发一种小门数、性能稳定、经济合理的数字程控交换机已经成为可能。本文研究的即为适用于电力部门的小型数字程控交换系统。本文主要完成了数字程控交换系统整体硬件设计和时钟级程序的设计。首先,介绍了数字程控交换机的基本理论和电力系统的发展状况;然后,开始深入研究硬件设计方案,完成了控制电路、交换网络、时钟系统等核心部分的设计。本设计中采用单片机作为控制中枢,降低了成本,缩短了开发周期;使用大规模集成专用数字开关作为数字交换网络,系统用户最大容量为240 们,增加了小型系统的可扩充性;并使用PLD 芯片构成整个系统的时钟单元,大大提高了系统运行的可靠性和稳定性。最后,实现了时钟级程序的软件设计。更多还原

【Abstract】 With the wide adoption of communication and computer technology, most transformer substation in electric department need less for maintain. So digital exchange system which is less users、high reliability and inexpensive have good foreground. In recent years, continuous improved and wide adopted of productivity of VLSI, the integrate chip which were very expensive now widely used in small and medium systems. So it is possible to explore that system describes above. The small digital programmable exchange system studied in this paper is suitable for electric department. The goal of this paper is to complete the design of the whole hardware system and clock class program. Firstly, the basic theory of digital exchange and the development electric system are introduced. Secondly, the hardware design project are deeply investigated, accomplished the main parts, such as, control circuit、exchange network、clock system, etc. Taken SCM as control centrum can depress cost and shorten explore periods;MT8980 as digital exchange network can buildup expansion to 240 gates; PLD as the clock unit for the whole system enhanced the reliability and stability significantly. Last, made the software design of clock class done.更多还原