Increased range of ultrasonic guided wave testing of overhead transmission line cables using dispersion compensation

Legg, Mathew; Yücel, Mehmet K.; Kappatos, Vassilios; Selcuk, Cem; Gan, Tat Hean

doi:10.1016/j.ultras.2015.04.009

Cited by 34 publications

(18 citation statements)

References 19 publications

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“…Advantages of such a technique were successfully demonstrated on the long range applications for rapid screening of pipes [9][10][11][12], rails [13,14] and transmission lines [15]. At present, UGW technology is used primarily to detect and locate defective areas.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Guided Wave Propagation through Welded Lap Joints

Jankauskas

Mažeika

2016

Metals

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Abstract:The objective of the research presented here is the investigation of ultrasonic guided wave (UGW) propagation through the lap joint welded plates used in the construction of a storage tank floors. The investigations have been performed using numerical simulation by finite element method (FEM) and tested by measurement of the transmission losses of the guided waves transmitted through the welded lap joints. Propagation of the symmetric S 0 mode in the welded stainless steel plates in the cases of different lap joint overlap width, operation frequency, and additional plate bonding caused by corrosion were investigated. It was shown that the transmission losses of the S 0 mode can vary in the range of 2 dB to 8 dB depending on the ratio between lap joint width and wavelength. It was also demonstrated that additional bonding in the overlap zone caused by corrosion can essentially reduce transmission losses.

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Section: Introductionmentioning

confidence: 99%

Ultrasonic Guided Wave Propagation through Welded Lap Joints

Jankauskas

Mažeika

2016

Metals

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“…Thus, researchers have rarely reported the effect of cables on the performance. In applications involving high frequencies or longer cables like ultrasonic microscopy, interventional ultrasound and structural health monitoring of large structures [18,61,64] significant losses in the amplitude and spectrum can be seen [75]. Due to cable losses, wireless sensor networks have gained more importance [76,77].…”

Section: Modeling Cable Effect On Transducer Performancementioning

confidence: 99%

A Review of Electric Impedance Matching Techniques for Piezoelectric Sensors, Actuators and Transducers

Rathod

2019

Electronics

107

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Any electric transmission lines involving the transfer of power or electric signal requires the matching of electric parameters with the driver, source, cable, or the receiver electronics. Proceeding with the design of electric impedance matching circuit for piezoelectric sensors, actuators, and transducers require careful consideration of the frequencies of operation, transmitter or receiver impedance, power supply or driver impedance and the impedance of the receiver electronics. This paper reviews the techniques available for matching the electric impedance of piezoelectric sensors, actuators, and transducers with their accessories like amplifiers, cables, power supply, receiver electronics and power storage. The techniques related to the design of power supply, preamplifier, cable, matching circuits for electric impedance matching with sensors, actuators, and transducers have been presented. The paper begins with the common tools, models, and material properties used for the design of electric impedance matching. Common analytical and numerical methods used to develop electric impedance matching networks have been reviewed. The role and importance of electrical impedance matching on the overall performance of the transducer system have been emphasized throughout. The paper reviews the common methods and new methods reported for electrical impedance matching for specific applications. The paper concludes with special applications and future perspectives considering the recent advancements in materials and electronics.

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“…For this reason the technique's resolution relies mainly on the cross-correlation properties of the excitation waveform and not on the length of the signals. Consequently the energy introduced into the waveguide can be increased without compromising the high-resolution of the technique if required [20]. Two alternatives to the conventional Hann-windowed excitation are evaluated: Barker code and chirp excitations.…”

Section: A Pulse Compressionmentioning

confidence: 99%

Wave Mode Discrimination of Coded Ultrasonic Guided Waves Using Two-Dimensional Compressed Pulse Analysis

Malo

Fateri

Livadas

et al. 2017

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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Ultrasonic guided waves testing is a technique successfully used in many industrial scenarios worldwide. For many complex applications, the dispersive nature and multimode behavior of the technique still poses a challenge for correct defect detection capabilities. In order to improve the performance of the guided waves, a 2-D compressed pulse analysis is presented in this paper. This novel technique combines the use of pulse compression and dispersion compensation in order to improve the signal-to-noise ratio (SNR) and temporal-spatial resolution of the signals. The ability of the technique to discriminate different wave modes is also highlighted. In addition, an iterative algorithm is developed to identify the wave modes of interest using adaptive peak detection to enable automatic wave mode discrimination. The employed algorithm is developed in order to pave the way for further in situ applications. The performance of Barker-coded and chirp waveforms is studied in a multimodal scenario where longitudinal and flexural wave packets are superposed. The technique is tested in both synthetic and experimental conditions. The enhancements in SNR and temporal resolution are quantified as well as their ability to accurately calculate the propagation distance for different wave modes.

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Increased range of ultrasonic guided wave testing of overhead transmission line cables using dispersion compensation

Cited by 34 publications

References 19 publications

Ultrasonic Guided Wave Propagation through Welded Lap Joints

Ultrasonic Guided Wave Propagation through Welded Lap Joints

A Review of Electric Impedance Matching Techniques for Piezoelectric Sensors, Actuators and Transducers

Wave Mode Discrimination of Coded Ultrasonic Guided Waves Using Two-Dimensional Compressed Pulse Analysis

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