基于STC89C52单片机压力测试与显示系统研究  

Pressure test and display system research based on STC89C52 single-chip processor

作　　者：杨阳 浦瀚 郭晓凤 YANG Yang;PU Han;GUO Xiao-feng(Nanjing Institute of Mechatronictechnology,Blue Island Maker Space,Nanjing 211135,China;College of Electrical Engineering and Control Science,Nanjing Tech University,Nanjing 211816,China;Department of Electronic Engineering,Nanjing Institute of Mechatronictechnology,Nanjing 211135,China)

机构地区：[1]南京机电职业技术学院蓝岛创客空间,江苏南京211135 [2]南京工业大学电气工程与控制科学学院,江苏南京211816 [3]南京机电职业技术学院电子工程系,江苏南京211135

出　　处：《电子设计工程》2018年第19期157-160,共4页Electronic Design Engineering

摘　　要：当前,市面上的数字电子秤存在精度差,分辨率低的缺点。本论文用单片机设计了一个数字电子秤,并给出了设计框图、硬件组成及软件系统。本系统以51单片机最小系统为核心,主要的部件有24位专用串行A/D转换芯片HX711、悬臂梁式电阻应变传感器,输出采用4位数码管显示。51单片机识别出传感器的信号,并且将其转化为微小的电压信号再经过24位专用串行A/D转换芯片HX711将微小的电压信号转换为24位的串行数字信号输入到单片机进行处理,最后输出到数码管上显示。本设计采用的24位专用串行A/D转换芯片HX711,具有分辨率高,占用I/O口少,与外设接口简单等优点。At present, the digital electronic scale on market precision is poor, the shortcoming of low resolution. This paper designed a MCU digital electronic scale, and gives the design diagram, hardware composition and software system. This system by 51 single chip microcomputer minimum system as the core, the main components of the 24 serial A/D conversion chip dedicated HX711, cantilever type resistance strain sensor, the output using four digital tube display. 51 single-chip microcomputer to identify the sensor signal, and converting it into tiny voltage signal through the serial A/D conversion chip dedicated 24 HX711 converts small voltage signal to 24 bits serial digital signal input to the single chip microcomputer for processing, the final output to the digital tube display. This design USES the serial A/D conversion chip dedicated 24 HX711, has high resolution, occupy less I/O port, and simple peripheral interface etc.

关 键 词：数字电子秤 应变片式电阻传感器 HX711 单片机 

分 类 号：TH715.193[机械工程—测试计量技术及仪器]