Modeling a new dynamic approach to measure intraocular pressure with solitary waves

Nasrollahi, Amir; Rizzo, Piervincenzo

doi:10.1016/j.jmbbm.2019.103534

Cited by 13 publications

(4 citation statements)

References 45 publications

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“…The two models were integrated at the interaction point between the granular chain and the test specimen based on the Hertzian contact law. Owing to the scope of this paper, the numerical formulation and the analytical equations used for the simulation are not presented here and interested readers are referred to [27,[43][44][45][46][47][48]54] in order to gain more insight on the subject. For the models, the properties listed in Table 1 were used for the three materials, namely steel, granite, and foam considered in this study.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…A numerical study on the interaction of HNSWs with composite beams showed that solitary waves are helpful to evaluate the directional elastic parameters of the composites [40]. Others reported that the method is effective at detecting subsurface voids [38], assessing the quality of adhesive joints [22,30], composites [31,34,40,41], orthopedic and dental implants [32,42], and at measuring internal pressure [43][44][45][46] and axial stress [47,48].…”

Section: Introductionmentioning

confidence: 99%

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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: Numerical Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Misra

Jalali

Dickerson

et al. 2020

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…To this end, the use of highly nonlinear solitary waves (HNSWs) has been proved effective at identifying the mechanical properties of linear elastic media, 30,33,38 composites, [39][40][41] and geomaterials 42,43 ; measuring thickness 32,33,40 ; monitoring cement and concrete hydration 31,44,45 ; detecting defects in elastic solids and composites [46][47][48][49][50][51][52] ; assessing adhesive joints, 53 orthopedic and dental implants 54,55 and bone microstructure 56,57 ; inferring axial stress 33,[58][59][60] ; and measuring intraocular pressure. 61 The study presented in this article investigated the application of HNSWs to monitor corrosion in metallic structures using wired transducers, designed and assembled by our research group in past studies, and novel wireless transducers recently designed and assembled in our laboratory. Two experiments were conducted.…”

Section: Introductionmentioning

confidence: 99%

Remote wireless monitoring of localized corrosion using compact solitary waves

Jalali

Misra

Dickerson

et al. 2022

Structural Health Monitoring

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This article presents a method to monitor corrosion remotely, based on highly nonlinear solitary waves, which are compact and nondispersive. In the study presented in this article, two types of solitary wave transducers were used to monitor accelerated localized corrosion on a steel plate. The first type consists of a chain of spherical particles surmounted by a commercial solenoid wired to, and controlled by, a data acquisition system used to lift and release the first particle of the chain and induce the mechanical impacts and stress waves in the chain. The chain included a piezoelectric wafer disk, also wired to the same data acquisition system, to sense, digitize, and store the propagating waves for post-processing. The second type of transducer was identical to the first one but the data acquisition system was replaced by a wireless node that communicated with a mobile device using a Bluetooth connection. Eight transducers were used to monitor the plate for over a week to detect the onset and progression of localized corrosion. Corrosion detection was performed by extracting a few features from the time waveforms and feeding these features to an outlier analysis algorithm based on the Mahalanobis distance. The results of the experiment showed the effectiveness of the proposed monitoring approach at detecting defects close to the transducers and confirm previous numerical predictions by the authors. The experiments also provided evidence that the performance of the wireless transducers is nearly identical to the performance of their wired counterparts, paving the way to a new paradigm for the structural health monitoring of remote structural components in harsh environments.

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Low-Power Actuation Methods for Highly Nonlinear Solitary Wave Transducers Used to Assess Human Eyes

Hodgson

Dickerson²,

Rizzo³

2022

Lecture Notes in Civil Engineering

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Modeling a new dynamic approach to measure intraocular pressure with solitary waves

Cited by 13 publications

References 45 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

Remote wireless monitoring of localized corrosion using compact solitary waves

Low-Power Actuation Methods for Highly Nonlinear Solitary Wave Transducers Used to Assess Human Eyes

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