Process outputs, as reflected in the measured signals, are generally stochastic in nature. This chapter focuses on processing of sensor outputs and the identification of faults that may occur during laser processing, for example, cracking, porosity, no weld, and so on, and is limited to classification methods. Measured signals are often contaminated by noise. The Fourier transform involves the transformation of information from the time domain to the frequency domain. Data reduction is used to reduce the initial size of the data to make subsequent computations faster, with minimal loss of information. The chapter focuses on pattern recognition and neural network analysis. Feature extraction involves transformation of the signal, along with a reduction in the data size. Neural networks represent the classifier by nodes which are interconnected, with information available in the network being contained in the magnitude of the links between the processors.
Processing of Sensor Outputs
2023-02-07
30 pages
Article/Chapter (Book)
Electronic Resource
English
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