基于AT89C52的毫安级数字式电流测量仪的设计

摘要

In order to improve the accuracy of digital ammeter, was proposed based on single chip microcomputer of high precision digital current meter design, and completed the design of hardware and software. The system hardware part adopts single chip microcomputer AT89C52, AD7705 12864 LCD digital display, A/D converter and the software design chose faster, smaller memory assembly language, using AltiumDesigner software principle diagram. Practical application shows that the digital current meter, has high precision, strong anti-interference ability, strong expansibility, easy integration, etc, has reached the design requirements.%为了提高数字式电流表的精度,提出了基于单片机的毫安级数字式电流测量仪的设计方案,并完成了硬件软件设计. 该系统硬件部分采用AT89C52单片机,AD7705 A/D转换器及12864LCD数字显示屏,软件设计选择了运行速度更快,占用内存更小的汇编语言,原理图用AltiumDesigner软件绘制. 实际应用表明,该数字式电流测量仪,具有精度高、抗干扰能力强,可扩展性强、集成方便等特点,达到了设计要求.