Effect of Electrode Configuration on High Temperature Thickness Shear Gallium Phosphate Transducer

Dhutti, Anurag; Gan, Tat-Hean; Mohimi, Abbas; Balachandran, W.; Kanfoud, Jamil

doi:10.3390/proceedings1040381

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…Other thin film electrodes for operation at temperatures up to 850°C have been summarised in [53]. The shape of the electrode can also influence the behaviour or mode of vibration as shown in a previous study [54], so FEA modelling is often necessary to achieve the desired displacement patterns.…”

Section: High Temperature Piezoelectric Materialsmentioning

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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Section: High Temperature Piezoelectric Materialsmentioning

confidence: 99%

Pipeline Health Monitoring to Optimise Plant Efficiency

Dhutti¹,

Gan²

2019

Power Plants in the Industry

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“…The anomalies might be attributed to the peculiar design of the transducer, as it features a wrap-around electrode configuration. Recent work on transducers with this characteristic has shown variations in the frequency response function when compared to a non-wrapped around case [23,24]. To the best of the authors’ knowledge, the influence of this design choice on transducer behaviour has not been quantified in literature yet.…”

Section: Introductionmentioning

confidence: 99%

Characterization and Design Improvement of a Thickness-Shear Lead Zirconate Titanate Transducer for Low Frequency Ultrasonic Guided Wave Applications

Zennaro

O'Boy

Lowe

et al. 2019

Sensors

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Thickness-shear transducers for guided wave testing have been used in industry for over two decades and much research has been conducted to improve the resolution and sensitivity. Due to a geometric feature of the current state-of-the art transducer, there is an out-of-plane component in the propagation direction of the fundamental shear horizontal mode which complicates the signal interpretation. In such case, complex signal processing techniques need to be used for mode discrimination to assess the structural health with higher precision. Therefore, it is important to revise the transducer design to eliminate the out-of-plane components in the propagation direction of fundamental shear horizontal mode. This will enhance the mode purity of fundamental shear horizontal mode for its application in guided wave inspection. A numerical investigation has been conducted on a 3 mm thick 2 m circular steel plate to understand the behaviour and the characteristics of the state-of-the-art thickness-shear transducer. Based on the results, it is noted that the redesigning the electrode arrangement will suppress the out-of-plane components on the propagation direction of the fundamental shear horizontal mode. With the aid of this information current state-of-the-art transducers were redesigned and tested in laboratory conditions using the 3D Laser Doppler Vibrometer. This information will aid future transducer designers improve the resolution of thickness-shear transducers for guided wave applications and reduce the weight and cost of transducer array by eliminating the need of additional transducers to suppress spurious modes.

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Effect of Electrode Configuration on High Temperature Thickness Shear Gallium Phosphate Transducer

Cited by 2 publications

References 6 publications

Pipeline Health Monitoring to Optimise Plant Efficiency

Pipeline Health Monitoring to Optimise Plant Efficiency

Characterization and Design Improvement of a Thickness-Shear Lead Zirconate Titanate Transducer for Low Frequency Ultrasonic Guided Wave Applications

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