Abstract
This chapter focuses on the use of software in ultrasonics fields for manipulation of waveform data to produce a desired display or to provide a measurement of some aspect of the waveform. The manipulation of waveform data is based on mathematical procedures (algorithms) and may be performed in the natural time domain or in the spectral frequency domain. The main types of software are constructed to operate in the time/frequency domain and produce one of the desired results, including display of waveforms, measurement of a single parameter, statistical representation of defects or properties, waveform conditioning and spectral analysis, and imaging (mapping) of the distribution of defects or of variations in properties. The chapter explains in detail the different types of time–domain analyses. The chapter discusses the basic concepts of time–domain A-scan and B-scan, RT waveform, video waveform, and analytic envelope. The concepts of gating and thresholding, time of flight, waveform correlation and convolution, zero-crossing analysis, waveform conditioning, and signal-to-noise ratio are also discussed in the chapter.
Published Version
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