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infrared detection

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Image
Published: 01 January 1986
Fig. 7 Typical infrared detection system. More
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006444
EISBN: 978-1-62708-190-0
... of the vibrothermography process: vibration of the specimen by a transducer; conversion of vibrational energy into heat by a crack, delamination, and other contacting surfaces; conduction of the heat to an external surface; and infrared detection of the heat with a thermal camera. vibrothermography delaminations...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001747
EISBN: 978-1-62708-178-8
... carrier gas. This article describes the operating principles and sample selection of inert gas fusion. It explains the mechanisms involved in the introduction of fusion gas, separation and detection of fusion gas by thermal-conductive and infrared detection methods. Additionally, the article explains...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001746
EISBN: 978-1-62708-178-8
... compounds formed in the combustion zone. The article provides information on infrared and thermal-conductive detectors, which are used for the detection of CO2 and SO2. Finally, it addresses the requirements of a sample to undergo total and selective combustion, and presents examples showing...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003239
EISBN: 978-1-62708-199-3
... detectors (noncontact applications). These devices can detect infrared radiation of both short and long wavelengths, and very low-temperature or low-radiation levels without cryogenic cooling. Bolometers Bolometers are thermal detectors that are based on the principle that the resistance...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003657
EISBN: 978-1-62708-182-5
... Abstract This article begins with an overview of the various aspects of infrared pulse thermography used to detect disbondments, delaminations, and generalized corrosion. It describes the distinctive phases of the pulse thermographic process and the key components that are required to perform...
Image
Published: 01 August 2018
Fig. 40 Schematics and readouts illustrating infrared radiometer tests. (a) Arrangement for line scan test. (b) Example of readout and method of void detection. (c) Arrangement for area scan test. (d) Example of readout and method of void detection More
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
... nondestructive evaluation (TNDE) methods extract information about the subsurface state of the part from its transient response as it is excited from, or returns to, a quasi-equilibrium state. The modern era of TNDE began in the late 1960s with the invention and commercialization of the infrared (IR) camera...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002363
EISBN: 978-1-62708-193-1
... electrode imaging methods. The article discusses the magnetic techniques that are primarily used as inspection techniques for detecting fatigue cracks in structural components. It details the principles and operation procedures of the liquid penetrant methods, positron annihilation techniques, acoustic...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006662
EISBN: 978-1-62708-213-6
... fundamental vibrational modes occur, is the most useful for materials characterization. Intensity can be expressed as percent transmittance (% T ) or absorbance ( A ). If I 0 is the energy, or radiant power, reaching the infrared detector with no sample in the beam, and I is the energy detected...
Image
Published: 30 June 2023
Fig. 6 Potential in-process nondestructive testing and metrology inspection methods for defect detection in laser powder-bed fusion/directed-energy deposition. IR, infrared; CMM, coordinate measuring machine; GOM, 3D inspection software More
Image
Published: 01 January 2003
Fig. 3 Sonic thermography arrangement. (a) Ultrasonic (UT) gun energizes sample. Cork insulators mechanically isolate samples from the backing plate. Infrared (IR) camera captures images. (b) Thermograph from IR camera detects a crack at the root of the slot. More
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001735
EISBN: 978-1-62708-178-8
... ( A ). If I 0 is the energy, or radiant power, reaching the infrared detector with no sample in the beam, and I is the energy detected with a sample present, transmittance is: (Eq 4) T = I I 0 and percent transmittance: (Eq 5) % T = 100 I I 0 Absorbance...
Image
Published: 01 January 1986
Fig. 5 Insert gas fusion system for detecting nitrogen and oxygen. 1, Helium supply; 2, two-stage pressure regulator; 3, NaOH-impregnated clay; 4, Mg(ClO 4 ) 2 desiccant; 5, flow restrictor; 6, flow meter; 7, pressure regulator; 8, needle valve; 9, gas doser (optional); 10, flow manifold; 11 More
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005685
EISBN: 978-1-62708-198-6
.... These methods include light microscopy, scanning electron microscopy, atomic force microscopy, energy-dispersive X-ray spectroscopy, Auger electron spectroscopy, secondary ion mass spectrometry, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and Raman spectroscopy. atomic force...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005854
EISBN: 978-1-62708-167-2
... fault: Power supply has detected internal electronic circuit problem. (SCR, silicon-controlled rectifier; IGBT, insulated-gate bipolar transistor) Over voltage (fault): Power supply has detected internal overvoltage problem. Under voltage (fault): Power supply has detected internal...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003653
EISBN: 978-1-62708-182-5
... detection as only few natural materials fluoresce in the infrared ( Ref 35 ). The fluorescence can detect pH changes as well as changes in concentration of specific analytes (metal ions, oxygen, carbon dioxide, etc.). Thus, fluorescent techniques have been developed that are sensitive to small-concentration...
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
... to generate an image, because they do not require contact with the test piece and can be performed with only single-side access on flat or curved surfaces. In general, SET methods are limited to detection of features where the diameter of the flaw is greater than its depth and the material properties...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005638
EISBN: 978-1-62708-174-0
... plume intensity Infrared detection of keyhole molten metal Temperature detection of the weld bead behind the weld pool at the solid-liquid interphase Reflected laser power detection These signals will vary over the course of a single weld length; hence, it is necessary to capture...
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
.... They measure heat by detecting temperature-induced changes in the electrical resistance of an infrared-absorbing material. This small resistance change then can be measured using a Wheatstone bridge circuit in a manner analogous to a resistance wire strain gage. In the case of the bolometer, the reference arm...