Monitoring of hot pipes at the power plant Neurath using guided waves

Weihnacht, Bianca; Klesse, Thomas; Neubeck, Robert; Schubert, Lars

doi:10.1117/12.2008479

Cited by 6 publications

(3 citation statements)

References 1 publication

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“…Accordingly, the incident wave field can be considered as the guided wave SHM baseline measurement, whereas the scattered wave field represents the difference between a damaged state and the baseline. In realistic applications with varying additional mechanical loads or environmental conditions this becomes more complicated [23,24], requiring a sufficient amount of observations and accurate compensation or selection strategies [25,26]. Using the assumptions equations ( 3) and (2) in equation ( 1) leads to the Lippmann-Schwinger equation:…”

Section: Mathematical Description Of Matrix Imaging Techniquesmentioning

confidence: 99%

Matrix techniques for Lamb-wave damage imaging in metal plates

Neubeck

Kexel

Moll

2020

Smart Mater. Struct.

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The implementation of efficient maintenance strategies of thin-walled structural components require reliable damage detection and localization techniques. In particular, guided ultrasonic waves technology represent an auspicious approach when implemented in a structural health monitoring system. The method is usually based on distributed sensing with piezoelectric elements that act in turn as ultrasound transmitter and receiver. This work aims at a unifying framework for damage localization considering algorithms from different scientific disciplines, e.g. originated from radar and geophysics. Here, we systematically express those algorithms in matrix form and compare the respective damage localization performance with experimental measurements considering an isotropic specimen with a single and also multiple simultaneous defects. In addition, we evaluate the algorithms’ point spread function and propose performance metrics to quantitatively compare the imaging success.

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Section: Mathematical Description Of Matrix Imaging Techniquesmentioning

confidence: 99%

Matrix techniques for Lamb-wave damage imaging in metal plates

Neubeck

Kexel

Moll

2020

Smart Mater. Struct.

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“…These analytical solutions were limited to simple structural geometries and boundary conditions. Analytical models can also be coupled with data-driven strategies, with fewer baseline measurements making this approach efficient, practical and useful (Figure 9) as demonstrated in [69].…”

Section: Signal Processing For Data Correctionmentioning

confidence: 99%

Pipeline Health Monitoring to Optimise Plant Efficiency

Dhutti¹,

Gan²

2019

Power Plants in the Industry

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This chapter presents technological innovations that support asset integrity management-a crucial activity for optimising plant efficiency. In ageing thermal and geothermal power plants, critical assets such as steam piping are subject to high pressures and temperatures that accelerate damage mechanisms. Traditionally, the critical locations of these assets undergo routine inspection which is both costly and time consuming and affects the plant reliability and energy availability. There is an increasing trend in the application of non-destructive testing (NDT) and information technologies to in-service monitoring of these assets. The aim of this chapter is to provide a comprehensive overview of the state-of-the-art monitoring technologies for steamlines, with a focus on high temperature ultrasonic guided wave techniques. The enabling technologies, which include high temperature sensors, diagnostic data analysis algorithms and their monitoring performances, are reviewed. These technological advancements enable inspection without interruption of plant operations, and provide diagnosis and prognosis data for condition-based maintenance, increasing plant safety and its operational efficiency.

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“…Traditional Commercial-Off-The-Shelf (COTS) systems were bulky, costly and often inflexible in configuration and/or scalability, militating against in-service deployment. With ever increasing access to smaller and more energy efficient electronics newer generation hardware has gone a long way to solving these issues [ 10 , 11 , 12 , 13 , 14 ]. However, there is still considerable room for improvement, particularly with respect to drive voltage, excitation and acquisition bandwidth, system compactness, portability and, electrical and mechanical robustness.…”

Section: Introductionmentioning

confidence: 99%

An Advanced Multi-Sensor Acousto-Ultrasonic Structural Health Monitoring System: Development and Aerospace Demonstration

et al. 2017

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A key longstanding objective of the Structural Health Monitoring (SHM) research community is to enable the embedment of SHM systems in high value assets like aircraft to provide on-demand damage detection and evaluation. As against traditional non-destructive inspection hardware, embedded SHM systems must be compact, lightweight, low-power and sufficiently robust to survive exposure to severe in-flight operating conditions. Typical Commercial-Off-The-Shelf (COTS) systems can be bulky, costly and are often inflexible in their configuration and/or scalability, which militates against in-service deployment. Advances in electronics have resulted in ever smaller, cheaper and more reliable components that facilitate the development of compact and robust embedded SHM systems, including for Acousto-Ultrasonics (AU), a guided plate-wave inspection modality that has attracted strong interest due mainly to its capacity to furnish wide-area diagnostic coverage with a relatively low sensor density. This article provides a detailed description of the development, testing and demonstration of a new AU interrogation system called the Acousto Ultrasonic Structural health monitoring Array Module+ (AUSAM+). This system provides independent actuation and sensing on four Piezoelectric Wafer Active Sensor (PWAS) elements with further sensing on four Positive Intrinsic Negative (PIN) photodiodes for intensity-based interrogation of Fiber Bragg Gratings (FBG). The paper details the development of a novel piezoelectric excitation amplifier, which, in conjunction with flexible acquisition-system architecture, seamlessly provides electromechanical impedance spectroscopy for PWAS diagnostics over the full instrument bandwidth of 50 KHz–5 MHz. The AUSAM+ functionality is accessed via a simple hardware object providing a myriad of custom software interfaces that can be adapted to suit the specific requirements of each individual application.

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Monitoring of hot pipes at the power plant Neurath using guided waves

Cited by 6 publications

References 1 publication

Matrix techniques for Lamb-wave damage imaging in metal plates

Matrix techniques for Lamb-wave damage imaging in metal plates

Pipeline Health Monitoring to Optimise Plant Efficiency

An Advanced Multi-Sensor Acousto-Ultrasonic Structural Health Monitoring System: Development and Aerospace Demonstration

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