基于单片机的多功能称重系统精要.doc

摘 要 在微电子迅速发展的今天，在市场上用的传统的称重工具已经不能满足人们的要求，为了改变传统称重工具在使用上存在的问题，在本设计中将智能化、自动化、人性化用在了电子称重的控制系统中。本设计主要由单片机来控制，测量物体重量部分由称重传感器及A/D转换器组成，加上显示单元，此电子秤具备了功能多、性能价格比高、功耗低、系统设计简单、使用方便直观、速度快、测量准确、自动化程度高等特点。 本系统以AT89S51单片机为主控芯片，外围附以称重电路、显示电路、报警电路、键盘电路等构成只能称重系统电路板，从而实现自动称重系统的各种控制功能。此设计满足现代人们对科技的要求。 关键词：称重传感器、单片机、A/D转换器、LCD显示 Abstract With the application of micro-electronics technology, tradition ponderation instrument used in market has been not satisfaction with hunman requirements already. In order to make up for the traditional apparatus shortcoming, we improve the apparatuss control system with intelligence and automation. This system is mainly controlled by microcontroller, the section of height measurement accomplish by supersonic sensor, the section of weight measurement accomplish by weight sensor and A/D transformer, this apparatus have many characteristic such as having more function, consume less energy, small and move easily, low price, measure precisely, the speed is quick, automatic work without people and so on. The system is mainly controlled by the microcontroller AT89S52, the periphery is consist of the circuit of clock and calendar, the circuit of measure height and weight, the circuit of display and print, all of these comprise the circuit board of the intelligent apparatus of height and weight. It can achieve all function of the apparatus. KEYWORDS:SP20C-G501，AT89S52，ponderation –sensor，A / D converter，LCDDisplay 目录 摘要...............................................................I Abstract...........................................................II 1 绪论.............................................................1 1.1 多功能称重系统的分类.........................................1 1.2多功能称重系统的组成结构......................................2 1.3多功能称重系统的工作原理......................................3 1.4多功能称重系统的设计要求......