电子秤设计毕业论文.docx

电子秤设计毕业论文 智能电子秤设计 摘要 目前，电子计价秤的使用非常普及，逐渐会取代传统的杆秤。由压力传感器制作的电子秤已广 泛地应用到各行各业，特别是微处理机的出现，工业生产过程自动化程度的不断提高，压力传感器 已成为过程控制中的一种必需的装置。 本文介绍了一种以MSP43单片机微处理器最小系统，并配以几个主要的集成电路器件设计成 的智能电子秤。本系统是利用压力传感器采集当前压力，根据输入单价，准确计算出物品的金额， 同时把重量、金额显示到LED数码管上。 关键i司：压力传感器放大器单片机 Abstract Nowadays, electronic scale is very popular and it will replace the traditional steelyard gradually. The electr onics steelyard made by the pressure tran sducer has bee n applied to all professions, especially the emerge nee of the microprocessor. And with the increasing of the automati on of in dustry product ion, the pressure tran sducer becomes a kind of esse ntial device in the process con trol. This paper introduces a MSP430 smallest single-chip microprocessor system, and with several major integrated circuit devices designed as a smart electronic scales. The system is to use pressure sen sors collect the curre nt pressure, accord ing to in put price, and accurately calculate the amount of goods At the same time, the weight of the amount of shows on the LED digital tube. Keywords： Pressure Transducer amplifier Single chip microcomputer 目录 TOC \o 1-5 \h \z \o Current Document 第一章绪论 1 \o Current Document 1.1电子秤设计背景 1. \o Current Document 1?2称重技术和衡器的发展 1. \o Current Document 1?3电子秤的发展现状 1. \o Current Document 1?4电子秤的发展趋势 2. \o Current Document 1?5现有电子秤的不足 4. \o Current Document 第二章芯片介绍 5 \o Current Document 2.1单片机的发展 5. \o Current Document MSP430F149 芯片 6. \o Current Document MSP430F149 的引脚 6. \o Current Document MSP430F149 的模数转换器 ADC12 9 \o Current Document 23压力传感器 1.0 \o Current Document 2.3.1压力传感器的选择 10 \o Current Document 2.3.2放大电路 1.1 \o Current Document 2.4 LED数码管 12 \o Current Document 2.4.1数码管的分类 12 \o Current Document 2.4.2数码管的驱动方式 12 \o Current Document 2.5键盘 13 \o Current Document 26相关软件 13 \o Current Document Protel 99 SE 1.3 \o Current Document C 语言 1.5 \o Current Document 2.7小结 16 \o Current Document 第三章系统硬件设计 17 \o Current Document 3.1电子秤系统的构成及工作原理