基于STM32和HX710A的高精度电子秤
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摘要
为了实现高精度电子称重,采用电阻应变片组成应变电桥作为称重传感器,利用24位A/D转换芯片HX710A采集数据,采用精密稳压源TL431为A/D提供参考电压,利用STM32F103单片机处理数据,通过键盘和液晶实现人机交互,设计了一款高精度电子秤。文章给出了详细硬件电路设计以及软件程序流程,并进行了实际制作和测试。结果表明该电子杆称重范围为5~500 g,称重误差≤0.5 g,具有设置单价和累加金额功能,以及去皮和计数功能。
In order to achieve the high precision electronic weighing,using the resistance strain gauge of strain bridge as weighing sensor,using24 bits A / D conversion chip HX710 A to collect data,using precision voltage source TL431 provides the reference voltage for the A / D,using STM32F103 microcontroller to process data,through the keyboard and LCD to realize human-machine interaction,and finally a high-precision electronic scale is designed. This paper gives the detailed hardware circuit design and software program flow,and completes the actual production and testing. The test results show that the electronic weighing range is 5 ~ 500 g,weighing error is 0. 5 g or less,has the functions of unit price setting and the amount of accumulation as well as peeling and count.
In order to achieve the high precision electronic weighing,using the resistance strain gauge of strain bridge as weighing sensor,using24 bits A / D conversion chip HX710 A to collect data,using precision voltage source TL431 provides the reference voltage for the A / D,using STM32F103 microcontroller to process data,through the keyboard and LCD to realize human-machine interaction,and finally a high-precision electronic scale is designed. This paper gives the detailed hardware circuit design and software program flow,and completes the actual production and testing. The test results show that the electronic weighing range is 5 ~ 500 g,weighing error is 0. 5 g or less,has the functions of unit price setting and the amount of accumulation as well as peeling and count.
引文
[1]甘慧娟.基于HX710A的高精度电子秤的设计与实现[C].中国职协2015年度优秀科研成果获奖论文集(中册),2015.
[2]王德清,胡晓毅,贾宏,等.基于SPCE061A的高精密电子秤设计与实现[J].电子技术应用,2008,31(5):83-85,89.
[3]罗及红.一种高精度的电子秤设计[J].计算机测量与控制,2010,18(8):1955-1958.
[4]李银伟.电阻应变式数字智能称重变送器设计[D].南昌:华东交通大学,2011.
[2]王德清,胡晓毅,贾宏,等.基于SPCE061A的高精密电子秤设计与实现[J].电子技术应用,2008,31(5):83-85,89.
[3]罗及红.一种高精度的电子秤设计[J].计算机测量与控制,2010,18(8):1955-1958.
[4]李银伟.电阻应变式数字智能称重变送器设计[D].南昌:华东交通大学,2011.