A study of strain and deformation measurement using the Arduino microcontroller and strain gauges devices

Silva, Anderson; Varanis, Marcus; Mereles, Arthur; Oliveira, Clivaldo; Balthazar, José Manoel

doi:10.1590/1806-9126-rbef-2018-0206

Cited by 15 publications

(13 citation statements)

References 12 publications

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“…Dessa forma, deformações em várias partes de uma estrutura real sob condições de serviço podem ser medidas com boa precisão sem que a estrutura seja destruída. Assim, pode-se realizar uma análise quantitativa da distribuição da deformação sob condições reais de operação (Andolfato, 2004;Silva, 2019).…”

Section: Extensometriaunclassified

Sistema De Aquisição De Dados De Extensometria Aplicado a Um Tambor Descascador De Toras De Madeira

Jesus

Segundo

2019

Anais Do 14º Simpósio Brasileiro De Automação Inteligente

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This work presents the development of an extensometer data acquisition system, applied to a wood debarking drum, aiming at the structural integrity analysis of the equipment. The debarking drum operates in a rotating motion to debar wood logs, which are thrown into the structure where contact with the cracked wall occurs. The experiment consists of installing strain gauges in critical areas of the drum structure and performing data acquisition through a system based on the ESP32 microcontroller, aiming to study the structural integrity of the equipment. Data transmission is performed via wireless communication, which facilitates the installation of strain gauges in the drum structure. Based on the results presented, it is possible to evaluate the impacts suffered by the equipment during its operating cycle. Resumo: Este trabalho apresenta o desenvolvimento de um sistema de aquisição de dados de extensometria, aplicados a um tambor descascador de toras de madeira, visando a análise de integridade estrutural do equipamento. O tambor descascador opera com movimento de rotação para descascar toras de madeira, que são lançadas dentro da estrutura onde ocorre o contato com a parede com fendas. O experimento consiste em instalar extensômetros em áreas críticas da estrutura do tambor e realizar a aquisição de dados por meio de um sistema baseado no microcontrolador ESP32, visando o estudo da integridade estrutural do equipamento. A transmissão dos dados é realizada por meio de comunicação sem fio, o que facilita a instalação dos extensômetros na estrutura do tambor. Com base nos resultados apresentados, pode-se avaliar os impactos sofridos pelo equipamento durante o seu ciclo de funcionamento.

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Section: Extensometriaunclassified

Sistema De Aquisição De Dados De Extensometria Aplicado a Um Tambor Descascador De Toras De Madeira

Jesus

Segundo

2019

Anais Do 14º Simpósio Brasileiro De Automação Inteligente

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“…This process involves three phases, namely signal collection, signal processing and result analysis. Regrettably, a fatigue signal is not easy to be obtained directly, and the acquisitions bear a high cost and consume a lot of time [8][9].…”

Section: Introductionmentioning

confidence: 99%

A Novel Way to Overcome Problems Arising in Strain Signal Measurements Leading to a Fatigue Failure Characterisation

Putra

Abdullah

Schramm

2020

IJAME

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The aim of this study is to identify the issues that arise when measuring a strain signal in order to characterise fatigue failure. In traditional methods, acquisition of a strain signal is constrained due to the presence of errors, time-consuming process and associated high cost. In this study, a new method for generating strain signals based on computer simulation was proposed. A strain gauge was positioned near the citical area pertaining to an automotive coil spring driven on road surfaces in order to measure strain signals. The strain signals were utilised for the inputs in the simulation. For validation purposes, the actual and simulated strain signals were examined by performing fatigue tests. The actual and simulated urban strain signals, respectively, required 412 and 415 reversals of blocks. For the rural road, the fatigue life was 137 and 139 reversals of blocks, respectively, for the actual and simulated strain signals. These indicated that simulated strain signals were accurately generated, providing a minimum fatigue life deviation, which was lower than 1.5 %. By developing the strain signals of a component through simulation, its integrity and fatigue failure can adequately be determined, thereby, saving the cost associated with operation and maintenance. Thus, the simulation is expected to assist the automotive industries involved with strain signal acquisition.

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“…the metal platens) plus the rock specimen. Therefore, the strain of the metal platens should always be subtracted in the first instance using preliminary calibration charts to avoid an overestimation of the sample's true deformation (Silva et al 2019). Alternatively, direct measurement methods through strain gauging technique can be adopted.…”

Section: Introductionmentioning

confidence: 99%

“…Alternatively, direct measurement methods through strain gauging technique can be adopted. However, given that strain gauges are relatively expensive and non-reusable, it could make the overall cost of the experimentation more expensive (Silva et al 2019). Further, it has been shown that the direct measurement of sample deformation under three-dimensional stress conditions is extremely difficult in practice.…”

Section: Introductionmentioning

confidence: 99%

On the accurate strain measurements for the crack initiation determination

Mahmoud¹,

Serati²,

Williams³

et al. 2020

Proceedings of the Second International Conference on Underground Mining Technology

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Due to the huge demand for natural resources and minerals at a global scale, mining depths have progressively increased over the past decades to 1,000 m and deeper. However, despite many successes, deep mining operations are now facing new challenges never experienced before, including rock spalling and unwanted slabbing failures. This phenomenon is characterised as a sudden explosion-like fracture, which can affect the long-term viability and stability of deep underground mining. According to the literature, the most indicative predictor of the spalling strength at laboratory scale is the determination of the crack initiation point, which is defined as the onset of stress-induced damage in low-porosity rocks after the closure of pre-existing cracks. Hence, many methods have been developed to identify this critical design parameter, based mainly on the measurement of vertical, lateral or volumetric strains. That is, an accurate measurement of strain is deemed critical in determining the onset of the crack initiation threshold in the study of rock failure. Nevertheless, it remains difficult to determine the actual sample deformation in many geotechnical test apparatuses (i.e. multi-stage triaxial, Hoek cell, true triaxial, etc.), in which the measured deformation by linear variable differential transformers (LVDTs) is the cumulative deformation of the load frame itself, the loading platens, and the sample. As a result, relying on these deformation measurements can lead to erroneous estimation of the material's strain behaviour. This work presents a qualitative study on how to measure the actual sample deformation in a multi-functional true triaxial testing apparatus recently commissioned at the Geotechnical Engineering Centre (GEC) within the

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A study of strain and deformation measurement using the Arduino microcontroller and strain gauges devices

Cited by 15 publications

References 12 publications

Sistema De Aquisição De Dados De Extensometria Aplicado a Um Tambor Descascador De Toras De Madeira

Sistema De Aquisição De Dados De Extensometria Aplicado a Um Tambor Descascador De Toras De Madeira

A Novel Way to Overcome Problems Arising in Strain Signal Measurements Leading to a Fatigue Failure Characterisation

On the accurate strain measurements for the crack initiation determination

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