电子秤主要以单片机STC90C52RC控制核心，实现电子秤的基本控制功能。系统可以分为最小系统、数据采集和人机交互界面三大部分。最小系统部分主要包括STC90C52RC和经典复位电路；数据采集部分由称重传感器、信号放大和A/D转换部分组成，信号放大和A/D转换部分主要由专用型高精度24位AD转换芯片HX711实现；人机交互界面为键盘输入和点阵式液晶显示，主要使用4*4矩阵键盘和1602液晶显示器，可以方便的输入数据和直观的显示数据。整个系统结构简单，使用方便，功能齐全，精度高，具有一定的开发价值。(The electronic scale is mainly controlled by the single chip microcomputer STC90C52RC, and realizes the basic control function of the electronic scale. The system can be divided into three parts: minimum system, data acquisition and human-machine interaction interface. The minimum system part mainly includes STC90C52RC and classic reset circuit, and the data acquisition part is composed of weighing sensor, signal amplification and A/D conversion section. The signal amplification and A/D conversion are mainly implemented by special type high precision 24 bit AD conversion chip HX711; the human-computer interaction interface is the keyboard input and the dot matrix LCD display. Using 4*4 matrix keyboard and 1602 LCD, you can input data and display data conveniently. The whole system has simple structure, convenient operation, complete functions, high accuracy and certain development value.)