Modified Fourth-Order Buck-Boost Converter

Abstract

High concentrations of harmful gases in the surrounding air might become poisonous, lead to fires or suffocation, and most likely, if no action is taken it might lead to injury or even death. The risk become much higher in poor society (for example, refugee camps). Hence, it is crucial to have a low cost and smart system that is able to detect and to react when a threat is present. The main focus of the presented scheme is to design and implement a low cast smart hazardous gas detecting system. The proposed design is controlled through Arduino, which in turn is connected to gas and temperature sensors. Furthermore, the Arduino is connected to suitable alarm, warning devices and elements with the ability to take appropriate actions when needed, thus a complete gas detection and alarm smart system is established. The proposed implementation detects the concentration of Liquefied Petroleum Gas (LPG) in the surrounding air, and measure the temperature; based upon these factors the device will act accordingly. A sensor is incorporated to indicate the concentration of the gas via a unique relationship between the concentration of the gas and the conductivity of the sensor material. The later signal is then processed using an analog to digital converter in the Arduino. Then the concentration and the temperature will be displayed on the GUI (Graphical User Interface) that is manipulated by LabVIEW program. The device is modeled to include 6 different stages of the concentration of LPG and 1 level of temperature, each stage can be modified and has its own based upon actions. The device is tested against some threats like those resulting from LPG stoves which are widely used and successfully detects and react accordingly