毕业论文设计-基于基于AT89S52单片机的电子秤重系统设计.doc

基于AT89S52单片机的电子秤系统设计
摘要
电子秤是将检测与转换技术、计算机技术、信息处理、数字技术等技术综合一体的现代新型称重仪器。它与我们日常生活紧密结合息息相关。
电子称主要以单片机作为中心控制单元,通过称重传感器进行模数转换单元,在配以键盘、显示电路及强大软件来组成。电子称不但计量准确、快速方便,更重要的自动称重、数字显示,对人们生活的影响越来越大,广受欢迎。
本系统的设计主要从硬件电路设计,软件编程调试,实物焊接调试三部分进行详细阐述。硬件电路主要是基于单片机AT89S52为核心的控制单元实现数据的处理,采用压力传感器对数据进行采集,电子秤专用24位AD转换芯片HX711对传感器采集到的模拟量进行AD转换,转换后的数据送到单片机进行处理显示,数据显示由LCD1602液晶实现,液晶显示效果稳定无闪烁
关键词: AT89S52单片机;电子秤;压力传感器;HX711
WIRELESS TEMPERATURE DETECTING SYSTEM DESING BASED ON MCU

ABSTRACT
With Intelligent electronic scale is the detection and conversion technology, computer technology, information processing, digital technology, an integrated modern technology of new weighing equipment.
Ectronic scale takes SCM as its central controling unit,and achieves AD transform through weighting transducer,then adds keybord,display circuit and powerful softerwear. It is not only accurate,swift,and convenient, but also makes an important effect to people’s life by its automatic weightment and digital display, so it es more and more popular.
The design of this system gives its eleboration from 3 parts: Hardwear circuit design,softwear programme debugging and entity weld debugging.
Hardwear circuit reaches data processing by the controling unit which based on AT89S52,and gathers data by weighting transducer,then makes AD transform by HX711 to the data gathered, and the transformed data then transferred to AT89S52 for display prosessing, at last LCD1602 would show it out steadily without twinkling
Key Words: AT89S52 MCU,Electrnoic Scale,Load sensor,HX711.
目录
摘要 I
ABSTRACT II
目录 III
第1章绪论 1
1
系统设计要求 2
3
4
电子秤的基本结构 4
电子秤的工作原理 5
电子秤的计量性能 6
第2章系统硬件设计 7
流系统元器件选型及参数介绍 7
系统单片机选型 7
系统传感器选型 8
系统AD转换芯片选择 10
12
13
系统硬件电路设计 14
14
15
16
17
18
20
Protell 99 SE软件介绍 20