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single-element transducer-based system

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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
... discusses the principles of each of these inspection methods. It describes the applications and the basic data formats for single-element transducer-based systems, including A-scans, B-scans, and C-scans. The article provides information on electronic equipment used for ultrasonic inspection. It also...
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
... multichannel pulser and receiver instrumentation and transducers with multiple piezo elements arranged in a single housing ( Ref 15 – 17 ). A single channel can also control multiple elements. This practice is called multiplexing. Multiplexing is used to simulate the capability of a system with more channels...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006471
EISBN: 978-1-62708-190-0
... ultrasonic waves; some examples are shown in Fig. 1 ( Ref 1 , 2 ). Conventional technologies most commonly have used single-element piezoelectric-based transducers that couple energy into a part using a couplant. This couplant can be a grease or gel in contact testing, or a large volume of fluid, commonly...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002149
EISBN: 978-1-62708-188-7
..., as wells as the advantages and disadvantages of this technology. It describes the roles of the three basic elements to any modern sensing system: sensing source, signal amplifier, and microprocessor or translator. The article reviews two case studies from two different ends of the metal removal spectrum...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006452
EISBN: 978-1-62708-190-0
... be stacked together to form a two-dimensional, cross-sectional image of the component, termed a B-scan. In contrast to a monolithic transducer, an array device comprises multiple independent transducer elements in a single package. There are three major advantages of using arrays over monolithic transducers...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003236
EISBN: 978-1-62708-199-3
... from the transducer are housed in the same unit. In a pulse-echo system with a single search unit, the electronic clock triggers the signal generator at regular intervals, which imposes a short burst of high-frequency alternating voltage on the transducer element. Simultaneously, the clock...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006336
EISBN: 978-1-62708-179-5
..., so access to only one surface is required. The pulser/receiver provides the transducer piezoelectric element with a voltage spike to produce the wave and amplification, filtering, and signal conditioning of the received voltage. An oscilloscope can be used to display a simple single-point...
Book Chapter

Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006474
EISBN: 978-1-62708-190-0
... been shown to offer significant advantages for composite inspection, including: Rapid inspection (10 to 30 m 2 /min, or 110 to 325 ft 2 /min) with a single transducer High spatial resolution, when expressed in terms of the diameter of a resolution element, is on the order of 0.025 cm 2 (0.004...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006470
EISBN: 978-1-62708-190-0
... and in many cases now employ a phased array, rather than a single-element transducer: An electronic signal generator that produces bursts of voltage (a negative spike or a square wave) when electronically triggered (pulsed) A transmitting transducer (probe or search unit) that can be a single element...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003658
EISBN: 978-1-62708-182-5
... modes for detecting corrosion wastage. Figure 2 illustrates the manner in which GW modes are formed in a structure. There are many variations on the basic elements of GW systems of NDE; these include a wide range of frequency selection, drive pulse shapes, sensor arrays, and electronic display systems...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003436
EISBN: 978-1-62708-195-5
...-echo ultrasonic methods typically use a single transducer as both the pulser and receiver of the ultrasound signal. The ultrasound is commonly coupled into the part using a couplant, such as water, glycerin, and other materials. Typical noncontact systems used to couple PE transducers to the parts...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006478
EISBN: 978-1-62708-190-0
... ultrasonic methods typically use a single transducer as both the pulser and receiver of the ultrasound signal. The ultrasound is commonly coupled into the part using a couplant, such as water, glycerin, and other materials. Typical noncontact systems used to couple PE transducers to the parts are hand-held...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.9781627081900
EISBN: 978-1-62708-190-0
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
... systems can also provide direct visualization of mode shapes, but these techniques generally require repeatable, harmonic motion, so they generally are not compatible with ultrasonic welder-based excitation. Finite-element analysis tools such as ANSYS, COMSOL, and ABAQUS can evaluate vibrational mode...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006460
EISBN: 978-1-62708-190-0
... transducer. This distinguishes laser-ultrasonics from piezoelectric-based ultrasonics, in which the source of ultrasound is a piezoelectric element separated from the tested material. This article discusses the various mechanisms that ensure ultrasound generation. This is a key factor that provides fairly...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006473
EISBN: 978-1-62708-190-0
... in this Volume ( Ref 6 , 7 ). The past decade has seen fundamental changes in ultrasonic NDT instrumentation and transducers. Most systems are now digital instruments, and many units employ phased arrays rather than single-element transducers; many systems implement full matrix capture, which enables...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006441
EISBN: 978-1-62708-190-0
...% of the material. A typical setup uses a transducer placed at one location, which emits signals and then listens for returning echoes; the arrival time of the echoes indicates the distance to the reflectors. Thus, a very rapid inspection of a long length of a structure can be achieved from a single location...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006449
EISBN: 978-1-62708-190-0
... scans in a single pass ( Ref 2 , 5 ), which saves on time and equipment space requirements. Combination systems typically include multiple orientations of transducers, receivers, probes, and sensors so they can detect defects in multiple orientations (longitudinal, transverse, oblique) and also provide...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005341
EISBN: 978-1-62708-187-0
... indications can arise from poor surface preparation or condition. The three basic penetrant systems commonly used are: Water-soluble: The penetrants can be removed directly with water. Postemulsifiable: These penetrants have an oil base and, thus, cannot be removed directly with water. Consequently...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006443
EISBN: 978-1-62708-190-0
... engineering and to unrealistic NDE performance expectations. All modern engineering is based on comprehensive applications of principles that can be implemented by qualitative measurements and predictive modeling and on comprehensive procedural applications of principles based on prior art and systems test...