Design of full bridge high voltage pulser for sandwiched piezoelectric ultrasonic transducers used in long rail detection

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

doi:10.1016/j.apacoust.2019.01.012

Cited by 11 publications

(6 citation statements)

References 19 publications

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“…The dual crystal contact piezoelectric transducer with frequency 5 MHz and diameter 10 mm was employed for transmitting and receiving ultrasonic signal. The excitation circuit used is a common circuit in the ultrasound equipment [34] as shown in figure 10. Spike pulses with voltage of about −300 V were generated by the pulse generation circuit to excite the transducer.…”

Section: Methodsmentioning

confidence: 99%

Separation of multi-echo overlapping ultrasonic signals for increasing the axial resolution using a neural network

Li,

Chen,

Zhang

et al. 2023

Meas. Sci. Technol.

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The ultrasonic Pulse-Echo method plays a significant role in ultrasonic thickness measurement. However, when the measured thickness is relatively thin, it is universal for the reflected ultrasonic echoes to overlap in the time domain which constrains the achievable resolution using the conventional Pulse-Echo method. A deep learning network for multi-echo overlapping ultrasonic signals separation under the constraint of an ultrasonic transducer with specific center frequency and bandwidth was proposed to enhance the axial resolution. With this model, the adaptive separation of overlapping signals with an unknown number of echoes is achieved by extracting detailed features of the overlapping signals. An overlapping signal training dataset based on truncated Nakagami functions is constructed to train the network. Simulation experiments under different degrees of overlap and noise levels were conducted for the performance analysis. Simulation results manifested the performance advantage of proposed separation method over some traditional separation methods. Further, ultrasonic thickness measurement experiments were performed on thin-walled aluminum alloy plates with various thicknesses, demonstrating feasibility and practicability of the network over traditional separation methods.

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Section: Methodsmentioning

confidence: 99%

Separation of multi-echo overlapping ultrasonic signals for increasing the axial resolution using a neural network

Li,

Chen,

Zhang

et al. 2023

Meas. Sci. Technol.

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“…A digital-to-analog converter and the digital pre-distortion technique were used to develop a Class-AB power amplifier with a second harmonic distortion (HD2) of −50 dB and a power efficiency of 30% [ 53 ]. Moreover, a Class-AB power amplifier with a center frequency of 20.046 kHz was used to drive a transducer [ 54 ]. In another study, a Class-AB power amplifier with a bandwidth of 15 MHz and an output voltage of 60 V was designed [ 55 ].…”

Section: Studies On Ultrasound Applicationsmentioning

confidence: 99%

An Inverse Class-E Power Amplifier for Ultrasound Transducer

Choi

2023

Sensors

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An inverse Class-E power amplifier was designed for an ultrasound transducer. The proposed inverse Class-E power amplifier can be useful because of the low series inductance values used in the output matching network that helps to reduce signal distortions. Therefore, a newly designed Class-E power amplifier can obtain a proper echo signal quality. The measured output voltage, voltage gain, voltage gain difference, and power efficiency were 50.1 V, 22.871 dB, 0.932 dB, and 55.342%, respectively. This low voltage difference and relatively high efficiency could verify the capability of the ultrasound transducer. The pulse-echo response experiment using an ultrasound transducer was performed to verify the capability of the proposed inverse Class-E power amplifier. The obtained echo signal amplitude and pulse width were 6.01 mVp-p and 0.81 μs, respectively. The −6 dB bandwidth and center frequencies of the echo signal were 27.25 and 9.82 MHz, respectively. Consequently, the designed Class-E power amplifier did not significantly alter the performance of the center frequency of the ultrasound transducer; therefore, it could be employed particularly in certain ultrasound applications that require high linearity and reasonable power efficiency.

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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%

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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Design of full bridge high voltage pulser for sandwiched piezoelectric ultrasonic transducers used in long rail detection

Cited by 11 publications

References 19 publications

Separation of multi-echo overlapping ultrasonic signals for increasing the axial resolution using a neural network

Separation of multi-echo overlapping ultrasonic signals for increasing the axial resolution using a neural network

An Inverse Class-E Power Amplifier for Ultrasound Transducer

Rail Diagnostics Based on Ultrasonic Guided Waves: An Overview

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