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A committee machine gas identification system based on dynamically reconfigurable FPGA

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Shi, M, Bermak, A, Chandrasekaran, S, Amira, A and Brahim-Belhouari, S (2008) A committee machine gas identification system based on dynamically reconfigurable FPGA. IEEE SENSORS JOURNAL, 8 (3-4). pp. 403-414. [Journal article]

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Abstract

This paper proposes a gas identification system based on the committee machine (CM) classifier, which combines various gas identification algorithms, to obtain a unified decision with improved accuracy. The CM combines five different classifiers: K nearest neighbors (KNNs), multilayer perceptron (MLP), radial basis function (RBF), Gaussian mixture model (GMM), and probabilistic principal component analysis (PPCA). Experiments on real sensors' data proved the effectiveness of our system with an improved accuracy over individual classifiers. Due to the computationally intensive nature of CM, its implementation requires significant hardware resources. In order to overcome this problem, we propose a novel time multiplexing hardware implementation using a dynamically reconfigurable field programmable gate array (FPGA) platform. The processing is divided into three stages: sampling and preprocessing, pattern recognition, and decision stage. Dynamically reconfigurable FPGA technique is used to implement the system in a sequential manner, thus using limited hardware resources of the FPGA chip. The system is successfully tested for combustible gas identification application using our in-house tinoxide gas sensors.

Item Type:Journal article
Keywords:committee machine (CM); dynamically reconfigurable field programmable gate array (FPGA); gas identification; pattern recognition
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:13402
Deposited By:Dr Abbes Amira
Deposited On:20 May 2010 11:28
Last Modified:25 Jul 2011 12:28

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