Construcción de un prototipo de supervisión y alerta de nivel de gases contaminantes dentro de vehículos con sistema de combustión.

Abstract

This graduate research aimed to construct a prototype for monitoring and alerting the level of polluting gases inside vehicles with combustion systems due to the deaths that have existed due to inhaling these gases when people were resting inside a car. The prototype consists of 5 blocks; the power supply comprises batteries and adapters to energize the prototype; the processing one consists of a development card that monitors the environment's air quality. The Data acquisition, which has sensors capable of measuring the concentration of polluting gases of carbon monoxide (CO), nitrogen oxides (NO⸼) and benzenes present in the environment; the visualization, with a screen that shows the information acquired in addition to presenting messages in extreme cases; and the actuators, which activates devices according to the level calculated by the processing block. Through tests, it was obtained that the prototype needs 5 minutes to warm up and calibrate the sensors; these present an absolute error of ± 1.65%; when calculating the repeatability with the correlation coefficient, it is obtained a maximum value of 3.93%, which, as it is less than the value considered as acceptable, according to the authors, determines the stability of the prototype. It is concluded that the implemented prototype is reliable, stable, and acceptable for monitoring the concentration of gases in the passenger compartment and can become a tool for decision making in the activation of actuators; It is recommended to integrate an intelligent system for the vehicle's self-diagnosis.