Methods of comparison and similarity scoring for electrical current waveforms

Rebonatto, Marcelo Trindade; Schmitz, Mauricio Antonioli; Spalding, Luiz Eduardo Schardong

doi:10.23919/cisti.2017.7975804

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…The coefficient can be comprised between +1 and −1, where 1 is the total positive linear correlation, 0 is no linear correlation, and −1 is the total negative linear correlation. Following past studies [59,60], Pearson's correlation coefficient was used in the work presented in this article to measure the similarity between the waveforms collected with the PXI and the wireless platform. The values of the coefficients for the steel, foam, and granite were 0.975, 0.878, and 0.957, respectively.…”

Section: Discussionmentioning

confidence: 99%

Wireless Module for Nondestructive Testing/Structural Health Monitoring Applications Based on Solitary Waves

Misra

Jalali

Dickerson

et al. 2020

Sensors

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In recent years, there has been an increasing interest in the use of highly nonlinear solitary waves (HNSWs) for nondestructive evaluation and structural health monitoring applications. HNSWs are mechanical waves that can form and travel in highly nonlinear systems, such as granular particles in Hertzian contact. The easiest setup consists of a built-in transducer in drypoint contact with the structure or material to be inspected/monitored. The transducer is made of a monoperiodic array of spherical particles that enables the excitation and detection of the solitary waves. The transducer is wired to a data acquisition system that controls the functionality of the transducer and stores the time series for post-processing. In this paper, the design and testing of a wireless unit that enables the remote control of a transducer without the need to connect it to sophisticated test equipment are presented. Comparative tests and analyses between the measurements obtained with the newly designed wireless unit and the conventional wired configuration are provided. The results are corroborated by an analytical model that predicts the dynamic interaction between solitary waves and materials with different modulus. The advantages and limitations of the proposed wireless platform are given along with some suggestions for future developments.

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Section: Discussionmentioning

confidence: 99%

Wireless Module for Nondestructive Testing/Structural Health Monitoring Applications Based on Solitary Waves

Misra

Jalali

Dickerson

et al. 2020

Sensors

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show abstract

“…Many assessment indices reflect the degree of similarity between the actual waveform and the theoretical waveform. Among them, the residual similarity and the Pearson correlation coefficient are employed relatively more frequently, and their calculations are simple [ 32 , 33 ].…”

Section: Performance Analysis Of the System Submodulementioning

confidence: 99%

Design and Performance Analysis of an Ultrasonic System for Health Monitoring of Concrete Structure

Zhao

Zheng

et al. 2021

Sensors

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The development and research of an ultrasonic-based concrete structural health monitoring system encounters a variety of problems, such as demands of decreasing complexity, high accuracy, and extendable system output. Aiming at these requirements, a low-cost extendable system based on FPGA with adjustable system output has been designed, and the performance has been evaluated by different assessment parameters set in this paper. Besides the description of the designed system and the experiments in air medium, the residual similarity and Pearson correlation coefficients of experimental and theoretical data have been used to evaluate the submodules’ output. The output performance of the overall system is evaluated by the Pearson correlation coefficient, root-mean-square error (RMSE), and magnitude-squared coherence with 40 experimental data. The maximum, median, minimum, and mean values in three-parameter datasets are analyzed for discussing the working condition of the system. The experimental results show that the system works stably and reliably with tunable frequency and amplitude output.

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Longitudinal Protection Method Based on Voltage Wave Comparison in AC/DC Hybrid System

Cong

Zhang

Kong

et al. 2022

IEEE Trans. on Ind. Applicat.

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Methods of comparison and similarity scoring for electrical current waveforms

Cited by 3 publications

References 20 publications

Wireless Module for Nondestructive Testing/Structural Health Monitoring Applications Based on Solitary Waves

Wireless Module for Nondestructive Testing/Structural Health Monitoring Applications Based on Solitary Waves

Design and Performance Analysis of an Ultrasonic System for Health Monitoring of Concrete Structure

Longitudinal Protection Method Based on Voltage Wave Comparison in AC/DC Hybrid System

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