Development of a Smart Automatic Gas Leakage Detector and Alarming System

Abstract

In comparison to firewood and charcoal, LPG is widely used as a source of fuel, mainly in urban regions. Due to the extremely combustible nature of the gas, there is always the risk of gas leakage as a consequence of carelessness or failure of the regulating valve on the gas cylinder, which poses a significant risk. Gas-related fires are on the rise, which may be prevented by utilizing a gas leakage detection system, necessitating the creation of a microcontroller-based cooking gas detector. The use of a microcontroller allows for the creation of a highly precise and quick reaction time detecting system. The detector includes a MQ-6 LPG gas sensor, a PIC16F690 microcontroller, an LCD, a buzzer, and a number of LEDs to learn about the gas leak's condition. When a voltage signal is present from the MQ-6 sensor exceeds a specific threshold, the microcontroller detects the presence of a gas and sends an audiovisual alert. All peripherals are linked to the microcontroller through its pins, which are coded in the PIC assembly language. When the system was turned on, the microcontroller turned on a green LED to indicate that there was no gas leakage. A digital multimeter is used to monitor the sensor voltage signal when LPG gas is discharged. Whenever the voltage is less than 2.0V, the green light remains illuminated; when the voltage is more than 2.0V, the microcontroller blinks a red LED and sounds an alarm to indicate the presence of a gas. The alert can be recognized by pressing a button on the sensor. When the system was turned on, the microcontroller turned on a green LED to indicate that there was no gas leakage. A digital multimeter is used to monitor the sensor voltage signal when LPG gas is discharged. Whenever the voltage is less than 2.0V, the green light remains illuminated; when the voltage is more than 2.0V, the microcontroller blinks a red LED and sounds an alarm to indicate the presence of a gas. The alert can be recognized by pressing a button on the sensor.