单片机在商用电子秤中的应用毕业设计

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1、 本本 科科 毕毕 业业 论论 文文 题 目 单片机在商用电子秤中的应用 学 院 工业制造学院 专 业 测控技术与仪器 2012 年 06 月 1 日 单片机在商用电子秤中的应用 摘要：近年来，电子称重技术取得了突飞猛进的发展，电子称在称重计量领域中占有越来越重要的 地位。尤其是商用电子称，由于其具有准确度高、反应灵敏、结构简单等优点，被广泛应用于工商 贸易、轻工食品、医药卫生等领域。目前，机械秤正在逐步被电子秤取代，这就促使电子秤的研究 需要进一步的深入。 本文设计的电子秤以单片机为主要部件，可大致分为：数据采集部分、信号放大部分、模数转 换部分、单片机控制部分、人机接口部分。 通过重力传感

2、器取得重量信息，用信号放大电路实现将采集的信息放大，利用 AD 转换器把输入 的模拟信号转换成数字信号送入单片机中进行处理，单片机将送入的信息通过运算和处理进行相应 的控制。最后与 LED 显示器、键盘和蜂鸣器能实现调节单价、去皮处理、显示总价格、超值警报等 功能使他智能化，符合现代社会要求。 关键字：单片机；电子秤；传感器；秤重技术 、 Single Chip Microcomputer Application in Commercial Electronic Scale Abstarct: In recent years, electronic weighing technology ha

3、s made make a spurt of progress And the electronic occupies an increasingly important position,especially for commercial electronics, Due to its high accuracy, sensitive reaction, simple structure and other advantages,they are widely used in industrial and commercial trade, light food, medicine and

4、other fields. At present, the mechanical scale is gradually being replaced by electronic scales, which requires further study in this field. In this paper, the design of the electronic scale uses single chip microcomputer as main components, which can be roughly divided into six part as following: d

5、ata acquisition, signal amplifying part, A/D conversion part, and a singlechip control part, part of the man-machine interface. The gravity sensor gains weight information,then,the signal amplification circuit realizes information amplification, and the AD converter sends the digital that is convert

6、ed from analog signal into the microcontroller for processing.By zhen, the microcontroller sends information through the operation and processing of the corresponding control. Finally ,with the keyboard, LED display and buzzer,it can to achieve price regulation, peeling process, displaying the total price, value alarm function and many other intelligent functions to meet the requirements of modern society. Keyword: Single chip mi