水质检测系统设计
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摘要
随着生活水平的提高,人们对水质也越来越重视,然而很多时候都缺乏一种比较简便有效的方法来检测水质。针对这种情况,本文设计了一种基于微控制器STM32的水质检测系统,通过PH传感器探头将溶液的PH转换成电电压信号,再经过前级电路的预处理,然后经STM32的A/D转换以及数据处理,并采用温度补偿以及两点校正法对所测得的PH值进行校正,最后通过OLED实时显示出来。
As people living standard rise, the quality of water is getting seriously. A water quality testing system based on STM32 was designed. Inthisdesign, a PH sensor was used to change the PH value into voltage signal, then the voltage signal was processed by pre-stage circuit so that it can be sent into the ADC of STM32. Besides, this system qualified temperature compensation function and used twopoint calibration to make sure higher precisions. Finally, the PH value tested and temperature.
As people living standard rise, the quality of water is getting seriously. A water quality testing system based on STM32 was designed. Inthisdesign, a PH sensor was used to change the PH value into voltage signal, then the voltage signal was processed by pre-stage circuit so that it can be sent into the ADC of STM32. Besides, this system qualified temperature compensation function and used twopoint calibration to make sure higher precisions. Finally, the PH value tested and temperature.
引文
[1]张磊,赵学亮,史云.基于MSC1210的水质快速检测仪[J].水文地质工程地质,2009,3:132-138.
[2]沈瑞,于海勋,王耀文.基于ARM7和LM35的温度采集系统设计[J].现代电子技术,2012,35(6):173-175.
[3]刘小灵,刘汉华,郑学仁,等.OLED点阵驱动电路设计及OLED驱动特性研究[J].液晶与显示,2005,20(2):140-144.
[2]沈瑞,于海勋,王耀文.基于ARM7和LM35的温度采集系统设计[J].现代电子技术,2012,35(6):173-175.
[3]刘小灵,刘汉华,郑学仁,等.OLED点阵驱动电路设计及OLED驱动特性研究[J].液晶与显示,2005,20(2):140-144.