The Design of The Monitoring Tools Of Clean Air Condition And Dangerous Gas CO, CO₂ CH₄ In Chemical Laboratory By Using Fuzzy Logic Based On Microcontroller

Abstract

There are many phenomena that human are exposed to toxins from certain types such as of CO2, CO2 and CH4 gases. The device used to detect large amounts of CO, CO2, and CH4 gas in air in enclosed spaces using MQ 135 gas sensors of different types based on the three sensitivity of the Gas. The results of testing the use of sensors MQ 135 on the gas content of CO, CO2 and CH4 received by the sensor is still in the form of ppm based on the maximum ppm detection range of each sensor. Active sensor detects CO 120 ppm gas, CO2 1600 ppm and CH4 1ppm "standby 1" air condition with intermediate rotary fan. Active sensor detects CO 30 ppm gas, CO2 490 ppm and CH4 7 ppm "Standby 2" with low rotating fan output. Fuzzy rulebase logic for motor speed when gas detection sensor CO, CO2, and CH4 output controls the motion speed of the fan blower. Active sensors detect CO 15 ppm, CO2 320 ppm and CH4 45 ppm "Danger" air condition with high fan spin fan. At the gas level of CO 15 ppm, CO2 390 ppm and CH4 3 ppm detect "normal" AC sensor with fan output stop spinning.

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“…The aspects of occupational health and safety in laboratories are widely described in many publications—examples can be found in the literature [ 44 , 45 , 61 ]. Therefore, the gas-sensing measurements are conducted under exposure to various gases, depending on the dedicated purpose.…”

“…Over time, the cost of production of gas sensors has decreased significantly with a simultaneous increase in their efficiency. In recent years, gas-detection technology has grown in importance due to its availability and widespread use in the following areas: air-quality monitoring [ 10 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 ], industrial production [ 24 , 25 , 31 , 32 ], food testing [ 10 , 21 , 26 , 27 , 33 , 34 , 35 ], automotive [ 10 , 23 , 27 , 35 , 36 , 37 ], industry [ 24 , 25 , 35 , 38 ], medical applications [ 10 , 22 , 25 , 26 , 27 , 35 , 39 , 40 , 41 ], fire warning [ 25 ], hazard monitoring [ 25 , 27 , 31 , 35 , 42 , 43 , 44 , 45 ], monitoring of gases at ambient conditions [ 46 , 47 ], that is the one of the most actual important approach, etc. ...…”

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“…Relay is an output component that is most often used in some electronic equipment and in various other fields [11]. Relay serves to connect or disconnect the flow of electric current that is controlled by providing a certain voltage and current in the coil.…”

Computer Numerically Controlled Machine to Draw text on Ardunio-based Acrylic Board

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