上海海洋大学 2013 届毕业设计(论文) 基于单片机的高精度电子秤设计
基于单片机的高精度电子秤设计
摘要:称重技术自古以来就和人们的生活息息相关,其被广泛应用于工业、农业、交通、科研、内外贸易等各
个领域,因此也成为了人们生活中不可缺少的一部分。随着科学技术的发展与人类生产力的不断提高,人们对计量
准确度的要求也越来越高。因此,担任绝大多数称重任务的电子秤,现在也受到越来越多的重视。称重技术的技术
水平直接影响着现代化和专业水平,以及社会经济效益的提高。近年来,电子称重技术取得了突飞猛进的发展,电
子称重技术也发挥着越来越重要的作用,其应用领域也在不断地扩大。特别是由于商业用电子称具有精度高,反应
灵敏,结构简单等特点,已经被广泛应用于工业和商业贸易,轻工食品,医药和卫生等各个方面。现如今,电子称
正在逐步取代目前较常使用的机械秤。这就促使电子秤的研究需要进一步的深入。
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。
关键词:电子称;单片机;称重传感器;HX711
High precision electronic scale design based on MCU
Abstract: Since ancient times, the weighing technology is closely related with people's lives. It is widely used in
various fields of industry, agriculture, transportation, scientific research, internal and external trade. So it has also become an
indispensable part of people's lives. With the development of science and technology and the continuous improvement of
human productivity, measurement accuracy requirements are also increasing. Therefore, the electronic scales which takes the
vast majority of weighing tasks, has also got more and more attention. The accuracy of weighing technology requirements are
increasingly high, electronic products, technology level, directly influences the level of modernization and professions to
improve the economic benefits of the society. In recent years, the electronic weighing technology achieved rapid
development, electronic weighing in the metrology area also plays more and more important position, and its applications are
constantly expanding. Especially, because of its commercial electronic with high accuracy, senstive reaction, simple structure,
etc, have been widely applied in industry and commerce trade, light food, medicine and health, etc. At present, mechanical
scales are gradually replaced by electronic, this has led to the further study of electronic. Electronic scales are one of the
electronic weighing instruments.
The design of this system gives it’s elaboration from 3 parts: Hardware circuit design, software program debugging and
entity weld debugging.
Hardware circuit reaches data processing by the control unit which based on AT89S52,and gathers data by weighting
sensor ,then makes AD transform by HX711 to the data gathered, and the transformed data then transferred to AT89S52 for
display processing, at last LCD1602 would show it out steadily without twinkling