An automatic optimal excitation frequency tracking method based on digital tracking filters for sandwiched piezoelectric transducers used in broken rail detection

Wei, Xiaoyuan; Yang, Yuan; Yao, Wenqing; Zhang, Lei

doi:10.1016/j.measurement.2018.11.033

Cited by 16 publications

(4 citation statements)

References 27 publications

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“…23 (a) and (d), a resonance circuit and an admittance circle O will be obtained in which six characteristic frequencies can be extracted including f n corresponding to the maximum impedance frequency, f p corresponding to the parallel resonance frequency, f a corresponding to the system anti-resonance frequency, f m corresponding to the maximum admittance, f s corresponding to the series resonance frequency, f r corresponding to the resonance frequency of the entire system. The optimal operating state of PUG system can be achieved once the frequency keeping

[161] . Since the resistance R 0 is too large to consider its influence, the SBVD model at the frequency f s and its corresponding admittance circle O 1 have shown in Fig.…”

Section: Main Circuit Module Designmentioning

confidence: 99%

Review of the design of power ultrasonic generator for piezoelectric transducer

Gao

Zhao

Wang

et al. 2023

Ultrasonics Sonochemistry

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[161] . Since the resistance R 0 is too large to consider its influence, the SBVD model at the frequency f s and its corresponding admittance circle O 1 have shown in Fig.…”

Section: Main Circuit Module Designmentioning

confidence: 99%

Review of the design of power ultrasonic generator for piezoelectric transducer

Gao

Zhao

Wang

et al. 2023

Ultrasonics Sonochemistry

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“…2. Land-based systems [9,[50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67]-The employed equipment is placed on the ground near to the railway infrastructure, and its actuators and sensors are attached to the rails under test. The detection of defects in the rails is achieved through a pulse-echo approach.…”

Section: Systems For Rail Defect Detection Based On Ultrasonic Guided Waves: Classificationmentioning

confidence: 99%

“…The development of a tracking method able to estimate the optimal excitation frequency, i.e., the one maximizing the received signal power [64].…”

mentioning

confidence: 99%

Rail Diagnostics Based on Ultrasonic Guided Waves: An Overview

Bombarda

Vitetta

Ferrante³

2021

Applied Sciences

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Rail tracks undergo massive stresses that can affect their structural integrity and produce rail breakage. The last phenomenon represents a serious concern for railway management authorities, since it may cause derailments and, consequently, losses of rolling stock material and lives. Therefore, the activities of track maintenance and inspection are of paramount importance. In recent years, the use of various technologies for monitoring rails and the detection of their defects has been investigated; however, despite the important progresses in this field, substantial research efforts are still required to achieve higher scanning speeds and improve the reliability of diagnostic procedures. It is expected that, in the near future, an important role in track maintenance and inspection will be played by the ultrasonic guided wave technology. In this manuscript, its use in rail track monitoring is investigated in detail; moreover, both of the main strategies investigated in the technical literature are taken into consideration. The first strategy consists of the installation of the monitoring instrumentation on board a moving test vehicle that scans the track below while running. The second strategy, instead, is based on distributing the instrumentation throughout the entire rail network, so that continuous monitoring in quasi-real-time can be obtained. In our analysis of the proposed solutions, the prototypes and the employed methods are described.

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“…Ultrasound or ultrasonic wave has long been used in many industrial businesses [1][2][3][4][5][6][7] including the medical applications [8][9][10]. The key device to generate the ultrasound wave is called ultrasonic piezoelectric transducer (UPZT).…”

Section: Introductionmentioning

confidence: 99%

Automatic Resonance-Frequency Tuning and Tracking Technique for a 1MHz Ultrasonic-Piezoelectric-Transducer Driving Circuit in Medical Therapeutic Applications Using dsPIC Microcontroller and PLL Techniques

Boontaklang¹,

Chompoo-inwai²

2019

IJIES

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Driving ultrasonic piezoelectric transducer (UPZT) at maximum performance in real-time operations is a very challenging task due to the deterioration problem of ultrasound output causing by human-skin impedance fluctuations. This paper proposed ideas and solutions on how to maximize the UPZT driving circuit performance in or deter to solve the deterioration problem. A newly-designed feedback control block with a phase-locked-loop (PLL) technique controlled by microcontroller has been added to the conventional UPZT driving circuit to ensure the automatic resonance frequency tuning and tracking capabilities. After intensive experiments, it is clear that the proposed technique works flawlessly and much more efficient compared to the conventional one. The experimental results also confirm that the percentage of error in tuning to the desired frequency is less than ±0.2% and the speed of tuning convergence time is between 9-12 milliseconds on average.

show abstract

An automatic optimal excitation frequency tracking method based on digital tracking filters for sandwiched piezoelectric transducers used in broken rail detection

Cited by 16 publications

References 27 publications

Review of the design of power ultrasonic generator for piezoelectric transducer

Review of the design of power ultrasonic generator for piezoelectric transducer

Rail Diagnostics Based on Ultrasonic Guided Waves: An Overview

Automatic Resonance-Frequency Tuning and Tracking Technique for a 1MHz Ultrasonic-Piezoelectric-Transducer Driving Circuit in Medical Therapeutic Applications Using dsPIC Microcontroller and PLL Techniques

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