摘要:随着电子科学技术的发展,电子测量成为广大电子工作者必须掌握的手段,对测量的精度和功能的要求也越来越高,而电压的测量甚为突出,因为电压的测量最为普遍。本设计在参阅了大量前人设计的数字电压表的基础上,利用单片机技术结合A/D转换芯片A/D574A构建了一个直流数字电压表。本文首先简要介绍了设计电压表的主要方式以及单片机系统的优势;然后详细介绍了直流数字电压表的设计流程,以及硬件系统和软件系统的设计,并给出了硬件电路的设计细节,包括各部分电路的走向、芯片的选择以及方案的可行性分析等。<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
关键词 :单片机(MCU); 电压;A/D转换;AD574A;ISD1420
Abstract: With the development of electronical scientific technology, electronical measurement became a technic that everyone of engaging electronical had to master it. What’s more, the precision is higher and higher and, the function is more and more powerful, and voltage’s measurement is best important. Primarily, I designed a Digital-Voltmeter use MCU technic with A/D-switch chip(AD574A) base on lots of predecessor design. In this article, introduce some methods that design Digital- Voltmeter and the advantages of use MCU system to do it on the first; then treat the procedure of design of direct- Digital-Voltmeter,contain the hardware and software.
Keywords: Micro Controller Unit;Voltmeter;A/D switch;AD574A;ISD1420
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用户230188 2009-10-9 21:06