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| 摘要: |
| 为监视供电系统一次设备的运行状态和计量一次设备的电气参数,设计了智能供电测控系统.系统采用AVR单片机ATmega128为主控制器,通过其内置A/D转换器进行模数转换及数据处理,选用TVA1421立式穿芯小型精密电压、电流通用互感器,实现供电系统一次侧电压、电流的测量,采用相应的算法编程运算得到一次系统的电压、电流、功率等参数.在开关量输入、输出电路中使用了光电隔离器件将单片机和外部设备隔离开.利用ATmega128单片机的强大的中断功能实现测控系统对某些紧急情况的实时处理.单片机串行口通过RS-422转换器连接RS-422网络,实现与上位机的通信.系统软件采用C语言编程,对实时性要求较高的部分采用汇编语言.以提高运行速度.实验证明:该系统采集速率高.抗干扰能力强.数据传输快速可靠.简单易操作. |
| 关键词: 单片机 中断 电压互感器 电流互感器 模数转换 光电隔离器 |
| DOI： |
| 分类号:TM769 |
| 基金项目: |
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| Design of intelligent measuring and control system based on ATmega128 |
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ZHANG Guixiang YAO Cunzhi
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| Abstract: |
| An intelligent measuring and control system is designed to monitor the operating states and measure the electrical parameters of power-supply system's primary equipments.It adopts AVR ATmega128 as the main controller,carrying out A/D conversion by its built-in A /D converter and data processing.The TVA1421 universal transformer is used for measuring the primary voltage and current of power-supply system and the primary electrical parameters are calculated by program.The optoelectronic isolator is set in bin... |
| Key words: SCM interruption PT CT A/D conversion optoelectronic isolator |
