毕业设计课 题 基于单片机的电子天平的设计 专 业 测控技术与仪器 年 级 姓 名 学 号 学 院(系)院长(签字) 指 导 教 师 (签字) 年 月 日摘 要天平是国家法定计量器具,在生活中,需求十分的广泛。电子天平是称重技术中的一种新型仪表,广泛应用于各种场合。电子天平与机械天平比较有体积小、重量轻、结构简单、价格低、有用价值强、维护方便、精度高等特点,可在各种环境工作,重量数据可通过通信方式远程传输,易于实现重量显示数字化,易于与计算机联网,而且可以计算总价等实现生产过程自动化,提高劳动生产率。本设计采纳STC89C52单片机作为核心主控芯片,实现称重、计算价格等主控功能。并采纳128*64汉字液晶显示模块显示称重重量、单价、总价等信息。采纳高精度电阻应变式压力传感器以及电子天平专用模拟/数字(A/D)转换器芯片HX711对传感器信号进行调理转换,采纳4*4矩阵键盘进行人机交互,键盘容量大,操作便捷。同时,具有超量程LED报警功能。关键词:电子天平,STC89C52单片机,液晶显示,A/D转换ABSTRACTBalance is the national legal measuring instruments,demand is very wide in life.Electronic balance weighing instrument is a new technology, widely used in various occasions.Electronic balance and mechanical balance has small volume, light weight, simple structure, low cost, practical strong, easy maintenance, high precision, and can work in various environments, the weight data through the communication of remote transmission, easy to achieve weight digital display, easy to network with computer, and can calculate the total price, the realization of the production process automation, improve labor productivity. This design uses STC89C52 microcontroller as the core control chip, realize weighing, calculation of price of main control function. And by using 128*64 Chinese characters LCD module display weighing weight, unit price, total price information. Using high-precision resistance strain pressure sensor and the electronic balance special analog / digital (A/D) conve...