Limits...
Self-Calibration and Optimal Response in Intelligent Sensors Design Based on Artificial Neural Networks

View Article: PubMed Central

ABSTRACT

The development of smart sensors involves the design of reconfigurable systems capable of working with different input sensors. Reconfigurable systems ideally should spend the least possible amount of time in their calibration. An autocalibration algorithm for intelligent sensors should be able to fix major problems such as offset, variation of gain and lack of linearity, as accurately as possible. This paper describes a new autocalibration methodology for nonlinear intelligent sensors based on artificial neural networks, ANN. The methodology involves analysis of several network topologies and training algorithms. The proposed method was compared against the piecewise and polynomial linearization methods. Method comparison was achieved using different number of calibration points, and several nonlinear levels of the input signal. This paper also shows that the proposed method turned out to have a better overall accuracy than the other two methods. Besides, experimentation results and analysis of the complete study, the paper describes the implementation of the ANN in a microcontroller unit, MCU. In order to illustrate the method capability to build autocalibration and reconfigurable systems, a temperature measurement system was designed and tested. The proposed method is an improvement over the classic autocalibration methodologies, because it impacts on the design process of intelligent sensors, autocalibration methodologies and their associated factors, like time and cost.

No MeSH data available.


Architecture of the artificial neural network.
© Copyright Policy
Related In: Results  -  Collection


getmorefigures.php?uid=PMC3814866&req=5

f1-sensors-07-01509: Architecture of the artificial neural network.

Mentions: Consequently for our proposal the most appropriate ANN to be implemented was a feed forward MLP with four neurons in the first layer and a logarithmic activation function. The second layer is a single neuron with a linear activation function. The architecture of the ANN is shown in Figure 1.


Self-Calibration and Optimal Response in Intelligent Sensors Design Based on Artificial Neural Networks
Architecture of the artificial neural network.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3814866&req=5

f1-sensors-07-01509: Architecture of the artificial neural network.
Mentions: Consequently for our proposal the most appropriate ANN to be implemented was a feed forward MLP with four neurons in the first layer and a logarithmic activation function. The second layer is a single neuron with a linear activation function. The architecture of the ANN is shown in Figure 1.

View Article: PubMed Central

ABSTRACT

The development of smart sensors involves the design of reconfigurable systems capable of working with different input sensors. Reconfigurable systems ideally should spend the least possible amount of time in their calibration. An autocalibration algorithm for intelligent sensors should be able to fix major problems such as offset, variation of gain and lack of linearity, as accurately as possible. This paper describes a new autocalibration methodology for nonlinear intelligent sensors based on artificial neural networks, ANN. The methodology involves analysis of several network topologies and training algorithms. The proposed method was compared against the piecewise and polynomial linearization methods. Method comparison was achieved using different number of calibration points, and several nonlinear levels of the input signal. This paper also shows that the proposed method turned out to have a better overall accuracy than the other two methods. Besides, experimentation results and analysis of the complete study, the paper describes the implementation of the ANN in a microcontroller unit, MCU. In order to illustrate the method capability to build autocalibration and reconfigurable systems, a temperature measurement system was designed and tested. The proposed method is an improvement over the classic autocalibration methodologies, because it impacts on the design process of intelligent sensors, autocalibration methodologies and their associated factors, like time and cost.

No MeSH data available.