Design of pH Measuring Equipment for Liquid Waste from Coal Mining Using Arduino Uno

Ery Safrianti, Feranita, Nurhalim, Wahyu Dwi Reza
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Abstract

In coal mining, to check the pH content of the water in the liquid waste from coal mining, most of the mining workers use conventional methods, namely by measuring using a digital pH meter or litmus paper periodically. Manual pH reading system makes handling slow. Based on these reasons the researchers designed a tool that can monitor pH values, the working principle of this tool is that the pH electrode is inserted into the sample solution, then the electrode detects the sample solution and changes the electrical signal, where the output will be amplified by an amplifier circuit in the form of an analog voltage, then on Arduino uno analog data is converted to digital data or ADC (Analog To Digital Conversion) after which it is converted again to pH value and displayed on an LCD that has been equipped with I2C. And this tool is also equipped with an RTC (Real Time Clock) so that it can display the time at which pH data is taken in the waste. The results of the calibration of the pH sensor obtained a linear equation, namely, Y = 25.84 - 7.1211X so that the designed tool has an error percentage of the manufacturer's pH meter tool of 1.028 %. By using this tool, the writer concludes that 0.4 grams of camphor (CaO) on the prototype or 480 kg in real conditions with a pool area of 600 m^3 can reduce the output voltage on the pH sensor from 3.20 V to 2.56 V thereby increasing the pH value. from 3.07 to 7.58 in pool 4 or drain pool.
基于Arduino Uno的煤矿废液pH测量装置设计
在煤矿开采中,为了检查煤矿废液中水的pH值,大多数矿工采用常规方法,即定期使用数字pH计或石蕊试纸进行测量。手动pH读数系统使处理缓慢。基于这些原因,研究人员设计了一种可以监测pH值的工具,该工具的工作原理是将pH电极插入样品溶液中,然后电极检测样品溶液并改变电信号,其中输出将被放大电路以模拟电压的形式放大。然后在Arduino上将模拟数据转换为数字数据或ADC (analog to digital Conversion),然后再次转换为pH值,并在配备I2C的LCD上显示。该工具还配备了RTC(实时时钟),以便它可以显示废物中pH值数据的时间。pH传感器的校准结果得到线性方程,即Y = 25.84 - 7.1211X,因此所设计的工具与制造商的pH计工具的误差百分比为1.028%。通过使用该工具,作者得出结论,在原型上使用0.4克樟脑(CaO)或在实际条件下使用480公斤樟脑(池面积为600 m^3)可以将pH传感器上的输出电压从3.20 V降低到2.56 V,从而提高pH值。第4池或排水池由3.07至7.58。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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