数字式精准称重系统设计与实现  

Design And Implementation of the Digital Precision Weighing System

作　　者：曾素琼[1] 梁志东[1] 

机构地区：[1]嘉应学院电子信息工程学院,广东梅州514015

出　　处：《电子质量》2015年第10期11-15,共5页Electronics Quality

基　　金：基于应用型人才教育的电子线路课程教学创新实验区(2015年嘉应学院质量工程项目(编号:415B0252));通信电子线路的总项目分环节设计的实验教学改革与实践(2015年嘉应学院教改重点项目(编号:415B0361))

摘　　要：设计了一款以STC单片机为中心控制器的数字式精准称重系统,对系统作了硬件和软件设计,利用电阻应变式传感器对称重物体采集,采集信号经仪表放大器进行信号处理及放大,采用单片机内部AD转换,标称值与AD转换输出值的良好线性回归对应处理,用键盘（按键）实现物品价格及去皮设置。经测试系统各功能正常,称重范围为0-0.999kg,重量误差小于±0.002kg,液晶实时显示总重量和总价格。系统计量准确、数字式实时显示、体积小、成本低、操作简便,适用于各种要求精准称重而重量较小的场合,有较好的应用前景。This paper designed a digital precision weighing system in STC microcontroller as the central controller,it made the hardware and software design of the system,it used resistance strain sensor weighing object collection,collecting signal by the instrumentation amplifier for signal processing and amplification,using MCU internal AD conversion,the nominal value of the linear regression good AD converter output values corresponding to the processing,realized prices of goods and tare with keyboard（keys）.After testing the system each function properly, weighing in the range of 0-0.999 kg,weight error is less than ±0.002 kg,LCD real- time display of the total weight and total price.The system accurate measurement,digital real- time display,small size,low cost,easy to operate,for a variety of requirements for precision weighing and weight smaller occasions,there is a good prospect.

关 键 词：称重系统 单片机 电阻应变式传感器 仪用放大器 数字式 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]