This study describes the design and implementation of an electronic nose, which was applied to classify and identify hazardous gases generated in underground coal mines. For this purpose, an electrochemical sensor array was used to detect a set of toxic gases. This work illustrates the electronic components of a wireless multisensory system for the toxic gases detection on indoor environments (i.e., underground mines), which was performed with reduced size, low cost and low electrical consumption, in order to detect different compounds using the basic principle of operation of each component to be applied to the target gas. Furthermore, the sample collection, data communication and data processing in real time obtained an excellent performance for gas sensing and even to measure the concentration level of the chemical volatile compounds transmitted from different points of the detection zone. The results demonstrated that using a wireless electronic nose for toxic gases detection was possible to reach a success rate of discrimination of 97%, using principal components analysis (PCA) and Linear Discriminant Analysis (LDA).
El presente artículo consiste en la implementación de un sistema de comunicación inalámbrica compuesto por los módulos XBeede la Serie 2, para la adquisición de señales en sistemas multisensoriales. Los módulos fueron acoplados a una cámara de medida compuesta básicamente de una matriz de 6 sensores de óxidos metálicos, con el objetivo de ser utilizados para el desarrollo de una nariz electrónica. Una interfaz gráfica fue realizada en Labviewpara establecer la comunicación entre el módulo inalámbrico y el sistema sensorial, con el fin de obtener la información relevante del conjunto de datos. Las señales de los sensores fueron almacenadas y visualizadas en tiempo real en un computador, para verificar el comportamiento del sistema.
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