基于单片机和传感器的电子秤系统教学设计与实现

Teaching design and implementation of electronic balance system based on single chip MCU and sensor

本设计主要目的是满足一般家庭和中小型菜市场零卖商贩使用,其电子秤的称重量程在0—25kg之内,精度高达1g,并具有计价功能,为商贩和顾客提供最直接的交易信息,方便买卖双方交易,减少双方欺诈。为实现这一目标本设计采用单片机STC89C51控制,并选用24位精度的HX711 A/D电子秤专用模块,液晶显示屏选用JLX12864G-085-P液晶模块。本设计电路简单完整、元器件的选择性价比很高,性能稳定、操作方便,参数指标符合计量要求,具有超量程声光自动报警等特点,具有很强的市场应用价值。

Main purpose of design is to meet in a common family, and small and medium-sized market retail traders, the use of the electronic scale weighing range within 0-25 kg, precision as high as 1 g, and has the function of pricing, trading information for vendors and customers provide the most direct and convenient for buyers and sellers trade, reduce fraud on both sides.To achieve this goal, this design USES the microcontroller STC89C51 control and choose 24 precision HX711 electronic scale special A/D module, LCD display screen choose JLX12864G - 085 - P LCD module. The choice of simple circuit complete, the design of components is cost-effective, stable performance, convenient operation, parameters conform to the requirements of the measurement, has the characteristics of ultra range audible and visual alarm automatically, has a strong market application value.