摘要
基于在系统可编程(ISP)器件的多路数据采样与测量系统由数据选择控制、A/D转换接口控制、ADC0809转换器、存储器、数码管显示和位选择控制等模块组成。系统设计的软件环境采用MAX-PLUSⅡ,应用VHDL语言,在FLEX20K上实现了数据选择控制、A/D转换接口控制、存储、数码显示等模块的设计。A/D转换接口控制模块分为等待、转换和读数3种状态;系统在A/D转换接口控制模块的作用下,依次对输入的8路模拟信号转换为8位二进制数字信号;8位二进制数字信号通过存储器将其转换为相应大小值的七段显示码,送到显示电路中,显示转换后数据值。所设计的系统实现了对多路模拟电压数据的采样、测量,其功能经过验证,测量精度达到0.01,符合设计技术要求。由于ISP器件可反复编程的特点,该系统可以在不改变整体结构的基础上进行升级和维护。
The multi-channel sampling and measuring system based on ISP（In System Programmable） device consists of modules of data-selection control,A/D interface control,AD conversion device, memory,numerical display and code control. The system is developed with VHDL（Very High speed integrated circuit hard Description Language） under MAX ＋ PLUS Ⅱ ,while module designs are realized with FLEX20K. The A/D interface control module is divided into three states：waiting, converting and reading, and under its control ,the 8- channel input analog signals are converted to 8- bit binary digital signals,which are converted into 7- sect displayed BCD codes,stored in memory,and then sent to display circuit. The designed system realizes sampling and measuring for multi -channel analog voltages with precision of 0.01,meeting technical requirements. The system can be upgraded and maintained without changing the whole structure due to the repeatable programming ability of ISP device.
出处
《电力自动化设备》
EI
CSCD
北大核心
2007年第3期69-72,共4页
Electric Power Automation Equipment
