摘要随着时间发展，要求称重技术的技巧提高，当前，市面上沿用的古老的称重器材已然不能满足人类的高标准。电子秤融合了多项技术，它是我们日常生活中不可或缺的一种方便快捷的称量工具，在商业、工厂、集市、超市等有广泛运用，它已经与人们的生活密不可分，作为现代化的时代，对于物体信息的要求越来越多，人们更希望获得精度更高的数据，而且要相当直观的呈现出来。 70418

电子秤的设计体系中融入了智能化，人性化，自动化。AT89S52是设计主要芯片，系统电路板通过称重电路，显示电路，报警电路，键盘电路4部分电路组成，进一步完成自动称重的各类控制的功效。

本文设计的电子称是利用单片机为核心，软件设计是以汇编语言开展的。利用传感器测量信号，采用仪表放大器放大信号，通过A/D转换器转换信号传送给CPU控制系统，通过LCD显示数据，键盘用来输入操作命令，报警系统可以预防超过重量从而损坏电子称。基本上完成了电子秤的称重功能。拥有使用便捷，清晰，测量精确，成本比较低等特点。顺应了当今社会进步的需求。

该论文有图20幅，表1个，参考文献25篇。

毕业论文关键词：压力传感器  仪表放大器  A/D转换器  LCD显示屏  AT89S52

Design of Digital Electronic Scales

Abstract  Over time, requirements for weighing technology skills improve, at present, the market follows the old weighing equipment already can not meet the high standards of humanity. Electronic scale integration of multiple technologies, it is an integral part of our daily lives, a convenient tool for weighing in business, factories, markets, supermarkets, etc. There are widely used, it has been inextricably linked with people's lives, as a modern era, the requirements for object information more and more, people want to get more accurate data, but also fairly straightforward presented.

  This article is based on single chip design, said the main electronic components in assembly language for software design. Measured by the sensor signal, amplifies the signal with a signal amplification system, after A / D conversion system control signal transmission to the CPU, LCD display system displays the data through the keyboard input system for entering instructions, the threshold alarm system to prevent over-range damage to electronic said. Basically realize the basic functions of electronic scales. With easy to use, intuitive, measurement accuracy, and low cost. Adapted to the needs of modern social development. 

  In this design will be intelligent, humane, automated electronic scales used in the control system. System uses the AT89S52 chip as the microcontroller control chip, the external load assigned to the city circuit, display circuit, alarm circuit, the keyboard circuit board constitutes a system, enabling the automatic weighing of the various control functions.

Key Words：Pressure Sensor  Instrumentation Amplifier  A / D converter  LCD display  AT89S52

目 录

摘   要 I

Design of Digital Electronic Scales II

Abstract II

图清单 Ⅳ

1绪论 1

1.1研究背景和意义 2

1.2国内外发展概况及发展趋势 2

1.3本课题的主要工作 3

2 设计方案的比较与选择 AT89S52单片机数显电子秤的设计+电路图+程序:http://www.751com.cn/zidonghua/lunwen_79734.html