5基于单片机的子称的制作与实现.doc

摘要 电子秤是将检测与转换技术、计算机技术、信息处理、数字技术等技术综合一体的现代新型称重仪器。它与我们日常生活紧密结合成为一种方便、快捷、称量精确的工具，广泛应用于商业、工厂生厂、集贸市场、超市、大型商场、及零售业等公共场所的信息显示和重量计算。 电子称主要以单片机作为中心控制单元，通过称重传感器进行模数转换单元，在配以键盘、显示电路及强大软件来组成。电子称不但计量准确、快速方便，更重要的自动称重、数字显示，对人们生活的影响越来越大，广受欢迎。 本系统针对电子称的自动称重、数据处理等进行了设计和制作。为了阐明用单片机是如何对采样数据进行处理，对数据的采集和转换、计算问题进行了研究，讨论了单片机控制系统中关键的计算问题。本文在给出智能电子称硬件设计的基础上，详细分析了电子称的软件控制方法。单片机控制的电子称结构简单，成本低廉，深受人们的喜爱，本文将对此进行详细讨论。 称重装置不仪是提供重量数据的单体仪表，而且作为工业控制系统和商业管理系统的一个组成部分，推进了工业生产的自动化和管理的现代化，它起到了缩短作业时间、改善操作条件、降低能源和材料的消耗、提高产品质量以及加强企业管理、改善经营管理等多方面的作用。称重装置的应用已遍及到围民经济各领域，取得了显著的经济效益。 本课题设计的电子秤以STC89C52单片机为主要部件, 通过对硬件和软件进行设计而成。 设计结果证明，该系统显示误差小，性能稳定，结构合理，扩展能力强。 关键词：STC89C52单片机；A/D转换；矩阵键盘；12864液晶 Abstract Electronic scale is the detection of integration and conversion technology, computer technology, information processing, digital technology and modern new weighing instrument. It is closely integrated with our daily lives into a convenient, fast, precision weighing instrument, widely used in commercial, factory factory, country markets, supermarkets, shopping malls, and retail and other public places, information display and weight. Electronic known mainly as a central control unit MCU, analog to digital conversion unit, through the weighing sensor, with the keyboard, display circuit and powerful software to form. Electronic said not only accurate measurement, impact on peoples lives is more and more big, the popular. The system design and production is known for the electronic automatic weighing, data processing. In order to illustrate how to use the MCU is sampling data processing, data acquisition and conversion, computational problems studied, discusses the calculation of key SCM system. In this paper the intelligent electronic scale based on the design of hardware, a detailed analysis of the software control method of electronic name. Microprocessor controlled electronics that has simple structure, low cost, loved by the people, this will be discussed in detail. Weighing device is provided not only single instr