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Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006368
EISBN: 978-1-62708-192-4
.... This article introduces the basics of signal processing in time, frequency, and time-frequency domains. It focuses on statistical analysis of the time-domain data. Various measures of data distribution and variability are pointed out. Important signal-processing functions in the frequency domain are presented...
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Published: 01 January 1986
Fig. 4 System for backscattering analysis and signal processing. More
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Published: 15 December 2019
Fig. 4 System for backscattering analysis and signal processing. RBS, Rutherford backscattering spectrometry More
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Published: 01 August 2018
Fig. 1 Simple signal processing model for a hardware lock-in analyzer More
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Published: 01 January 2001
Fig. 10 Changes in ultrasonic signal velocity during processing of a compression molded carbon/ epoxy prepreg laminate. Source: Ref 12 More
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006464
EISBN: 978-1-62708-190-0
... surface. This article discusses the strategies for implementing thermography for NDE, including the steady-state/whole-body approach and transient heat conduction. It describes the most common signal-processing methods, such as thermographic signal reconstruction, lock-in thermography, and pulsed-phase...
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001113
EISBN: 978-1-62708-162-7
... Abstract This article focuses on different thin-film deposition techniques used to make superconducting films and discusses the properties and advantages of high-critical-temperature and low-critical-temperature materials in a number of applications, including signal processing and analog...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005935
EISBN: 978-1-62708-166-5
... Abstract This article focuses on the heat removal stages involved in quenching, and on the experimental setup used for measuring temperature and detecting sound signals with the help of illustrations and curves. The quenching process generates acoustic signals, which are the consequences...
Series: ASM Handbook
Volume: 4F
Publisher: ASM International
Published: 01 February 2024
DOI: 10.31399/asm.hb.v4F.a0006999
EISBN: 978-1-62708-450-5
...-emission measurement sound-pressure signals TECHNICAL PROGRESS requires improved quality and more economical production of machine parts at the same time. Therefore, most manufacturing processes of machine parts end with heat treatment that includes hardening and tempering, which provide higher...
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Published: 15 December 2019
Fig. 8 Individual Anger camera module with scintillator 15 by 15 cm (6 by 6 in.) active area. Optics package and photomultipliers are at the very front. To optimize speed, a significant portion of the signal processing is made on the boards at the back. More
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Published: 01 August 2018
) If harmonic content in the EMAT current must be minimized (such as may be useful for some types of signal processing), a filter, either low pass or high pass, as appropriate, is sometimes useful (but keep in mind that many EMATs are themselves a very good filter). (v) When very long EMAT current tone bursts More
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003237
EISBN: 978-1-62708-199-3
... preamplifier and then to the main signal-processing equipment. The preamplifier can be miniaturized and housed inside the sensor enclosure, facilitating setup and reducing vulnerability to electromagnetic noise. Fig. 1 Typical construction of an acoustic-emission resonant sensor During an AE test...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006453
EISBN: 978-1-62708-190-0
... to generate a thermal response at the sample surface that is correlated to the thermophysical properties of the material or to a subsurface flaw or feature. The surface temperature response is detected by the IR camera, often aided by image and/or signal processing integrated into the camera or on a computer...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006451
EISBN: 978-1-62708-190-0
... to do this; these analyzers can be divided into two main groups: hardware-based lock-in analyzers and software-based lock-in algorithms. Hardware Lock-In Analyzers Additional insight into TSA can be realized by examining the response from the IR cameras from a signal processing perspective...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006469
EISBN: 978-1-62708-190-0
... transducer (which also is the sender in pulse-echo) An echo-signal amplifier, which may include filters A display, and now in many cases, a recording and signal-processing device In the most widely used version of pulse-echo systems, a single transducer acts alternately as the sending...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006400
EISBN: 978-1-62708-192-4
... and diagnosing machine faults but also making reliable predictions about how much longer a piece of equipment can operate safely, reliably, or economically. The recent development in computer and transducer technologies, coupled with the advances in signal processing and artificial intelligence techniques, has...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006454
EISBN: 978-1-62708-190-0
... it to the main signal-processing equipment. The preamplifier can be miniaturized and housed inside the sensor enclosure, facilitating setup and reducing vulnerability to electromagnetic noise. Fig. 6 Typical construction of an acoustic emission resonant sensor Sensor Response—Broadband or Resonant...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001470
EISBN: 978-1-62708-173-3
... traditionally covers several application areas. AI techniques that can be applied to the intelligent automation of joining include expert systems, intelligent data-base systems, image processing, signal analysis, fuzzy-logic systems, and artificial neural networks. An intelligent automation system usually...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006936
EISBN: 978-1-62708-395-9
... “backlash,” and it results in a small offset for every other scan line if data is collected while scanning in both directions. Scan speed may also be limited by the travel times for the sound waves and signal digitization, storage, processing, and display times. Increasing the scan speed beyond these limits...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005616
EISBN: 978-1-62708-174-0
... surface area with one pass, which helps minimize the lift-off variations. Considering the noise source in the eddy current method, having a small variation in the lift-off is a big advantage over many single-probe-based scan techniques. In many cases, advanced signal processing algorithms can be used...