Signal noise based transfer function approach for reliability estimation of ultrasonic inspection

Ali, Mohamed Subair Syed Akbar; Kumar, Anish; Rajagopal, Prabhu

doi:10.1016/j.ultras.2018.09.015

Cited by 3 publications

(2 citation statements)

References 32 publications

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“…The main difference lies in the optimization space or the efficiency. In addition, to improve the precision of the results in complex real-world issues, some scholars hold the view that increasing the signal-to-noise ratio (SNR) is of great significance; consequently, numerous works have decreased the weights of noise in raw signals [21][22][23]. Their main ideas are to improve the SNR first, and then the denoised signal is imported into the model of parameter estimation as the input.…”

Section: Introductionmentioning

confidence: 99%

ABIDE: A Novel Scheme for Ultrasonic Echo Estimation by Combining CEEMD-SSWT Method with EM Algorithm

Jiao

Zhu

et al. 2022

Sustainability

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Ultrasonic echo estimation has played an important role in industrial non-destructive testing and analysis. The ability to estimate parameters in the ultrasonic echo model is crucial to ensure the effectiveness of practical ultrasonic testing applications. In this paper, a scheme called ABIDE for identifying both multiple noises in the echo signal and the distribution of the denoised signal is proposed for ultrasonic echo signal parameter estimation. ABIDE integrates complementary ensemble empirical mode decomposition and the synchrosqueezed wavelet transform (CEEMD-SSWT) as well as the expectation maximization (EM) algorithm. The echo signal is split into a series of IMF components and a residual with the help of CEEMD, and then these IMFs are classified into the noise-dominant part and signal-dominant part by analyzing the correlation of each IMF and the echo signal using grey relational analysis. Considering the effect of noise in the signal-dominant part, SSWT is adopted to remove the noise in the signal-dominant part. Lastly, the signal output by the SSWT algorithm is used for reconstructing a denoised signal combined with the residual from CEEMD. Considering the distribution characteristic of the denoised signal, the EM algorithm is used to estimate parameters in the ultrasonic echo model. The relative performance of the proposed scheme was evaluated on synthetic data and real-world data and then compared with the state-of-the-art methods. Simulation results on synthetic data show that ABIDE outperforms the state-of-the-art methods in parameter estimation. Physical results on real-world data show that the proposed scheme has a greater PCC value in estimating echo model parameters. This paper also shows that ABIDE requires less convergence time than competitive methods.

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Section: Introductionmentioning

confidence: 99%

ABIDE: A Novel Scheme for Ultrasonic Echo Estimation by Combining CEEMD-SSWT Method with EM Algorithm

Jiao

Zhu

et al. 2022

Sustainability

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“…Variable loads, degradation speed, and weather anomalies enforce controlling the condition during the period of usage. For this purpose, the various nondestructive methods are utilized: eddy current method, electrical tomography, ultrasonic, thermographic, magnetic testing, magnetic particle inspection, liquid penetration testing, and structural health monitoring (SHM) . The choice of the measurement method depends on the material type, the expected defects, the designed structure life‐span, the environment, potential life threat, and financial losses.…”

Section: Introductionmentioning

confidence: 99%

Double patch sensor for identification of stress level and direction

Herbko

Łopato

2019

Int J RF Microw Comput Aided Eng

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In this article microstrip sensor for evaluation of stress direction and value was proposed. Developed sensor consists of two patches (resonators) of various sizes. Both patches have different operating frequencies and different angles between resonator axis and the direction of mechanical excitation—resonators are arranged along orthogonal axes. Proposed transducer enables determination of the direction and value of stress in the range from 0 to 90°. Patches are fed by T‐junction power divider, so they use one excitation port. The resonators were developed for operating frequencies of 2.65 and 2.75 GHz, so a small difference (100 MHz) compared to the sensor with one resonator was obtained between the two resonant frequencies. It enables better use of measuring hardware capabilities, which leads to faster and more accurate measurements. The proposed sensors were evaluated using numerical analysis and measurements. Moreover, the algorithm for identification of direction and stress level was proposed. It uses artificial neural network approximator. The algorithm was positively verified.

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Sensitivity Analysis of Circular Microstrip Strain Sensor

Herbko

Łopato

2019

2019 International Interdisciplinary PhD Workshop (IIPhDW)

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Signal noise based transfer function approach for reliability estimation of ultrasonic inspection

Cited by 3 publications

References 32 publications

ABIDE: A Novel Scheme for Ultrasonic Echo Estimation by Combining CEEMD-SSWT Method with EM Algorithm

ABIDE: A Novel Scheme for Ultrasonic Echo Estimation by Combining CEEMD-SSWT Method with EM Algorithm

Double patch sensor for identification of stress level and direction

Sensitivity Analysis of Circular Microstrip Strain Sensor

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