毕业论文 基于51的电子秤.doc
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毕业论文 基于51的电子秤,摘要 本文描述了基于at89s52单片机设计的电子秤原理及实现方法。该系统由51单片机的改良版52单片机控制，通过液晶屏自动显示所称物体的重量。其电路构成主要有测量电路，差动放大电路，a/d转换，单片机控制电路、显示电路。测量电路利用电阻式应变器件将物体的重量信号转化成相应大小的电信号，通过差动放大电路将电信号放大到a...
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摘要 本文描述了基于AT89s52单片机设计的电子秤原理及实现方法。该系统由51单片机的改良版52单片机控制，通过液晶屏自动显示所称物体的重量。其电路构成主要有测量电路，差动放大电路，A/D转换，单片机控制电路、显示电路。测量电路利用电阻式应变器件将物体的重量信号转化成相应大小的电信号，通过差动放大电路将电信号放大到AD芯片能够识别的范围内从而能将电信号转换成对应的数字信号送给单片机处理，最终在液晶上显示所称物体的重量，系统通过软件实现自动换挡。发挥部分的显示购物清单的功能，可以设置日期和设定十种商品的单价， 还具有超量程和欠量程的报警功能。整个系统结构简单，使用方便，功能齐全，精度高，具有一定的开发价值。
关键词：称重传感器 差分放大器 模数 转换器、
Based on 51 electronic says
Abstract This article describes the design of AT89s52 microcontroller based electronic scale theory and implementation methods. The system consists of 51 single-chip microprocessor control improved version 52, the LCD displays that object automatically. Its components are measuring circuit, differential amplifiers, A/d conversion, the microcomputer control circuit, show circuit. The measuring circuit using resistance strain the weight of the device object into the appropriate signals to the size of the electrical signals through the differential amplifier will signal amplification to AD chip can identify scope so that they could be an electrical signal into a digital signal corresponding to the handle to the SCM in the LCD display that the weight of the object, the system automatically by software implementation. Through debugging, and testing, system performance parameters basic design index.
Keywords Weighing sensors cell differential amplifier
目 录
引 言 1
第一章 设计任务要求与方案设计论证 2
第二章、电子元器件的选取与各硬件模块的具体实现方案 5
第三章、系统软件设计 10
第四章、系统调试 13
结论 16
参考文献 17
致谢 18
附录：原器件清单 19
关键词：称重传感器 差分放大器 模数 转换器、
Based on 51 electronic says
Abstract This article describes the design of AT89s52 microcontroller based electronic scale theory and implementation methods. The system consists of 51 single-chip microprocessor control improved version 52, the LCD displays that object automatically. Its components are measuring circuit, differential amplifiers, A/d conversion, the microcomputer control circuit, show circuit. The measuring circuit using resistance strain the weight of the device object into the appropriate signals to the size of the electrical signals through the differential amplifier will signal amplification to AD chip can identify scope so that they could be an electrical signal into a digital signal corresponding to the handle to the SCM in the LCD display that the weight of the object, the system automatically by software implementation. Through debugging, and testing, system performance parameters basic design index.
Keywords Weighing sensors cell differential amplifier
目 录
引 言 1
第一章 设计任务要求与方案设计论证 2
第二章、电子元器件的选取与各硬件模块的具体实现方案 5
第三章、系统软件设计 10
第四章、系统调试 13
结论 16
参考文献 17
致谢 18
附录：原器件清单 19
