Inverse Contrast in Non-Destructive Materials Research by Using Active Thermography

Noszczyk, Paweł; Nowak, H.

doi:10.3390/ma12050835

Cited by 12 publications

(8 citation statements)

References 48 publications

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“…Using long-wave infrared radiation in the measurements, thermal radiation is recorded. The camera captures objects, people and high-temperature sources in limited or no visibility conditions [73][74][75][76][77][78].…”

Section: Methodsmentioning

confidence: 99%

Thermal Imaging Study to Determine the Operational Condition of a Conveyor Belt Drive System Structure

et al. 2021

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The paper discusses the results of a study carried out to determine the thermal condition of a conveyor power unit using a thermal imaging camera. The tests covered conveyors in the main haulage system carrying coal from a longwall. The measurements were taken with a thermal imaging diagnostic method which measures infrared radiation emitted by an object. This technology provides a means of assessing the imminence and severity of a possible failure or damage. The method is a non-contact measuring technique and offers great advantages in an underground mine. The thermograms were analysed by comparing the temperature distribution. An analysis of the operating time of the conveyors was also carried out and the causes of the thermal condition were determined. The main purpose of the research was to detect changes in thermal state during the operation of a belt conveyor that could indicate failure and permit early maintenance and eliminate the chance of a fire. The article also discusses the construction and principle of operation of a thermal imaging camera. The findings obtained from the research analysis on determining the thermal condition of the conveyor drive unit are a valuable source of information for the mine’s maintenance service.

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Section: Methodsmentioning

confidence: 99%

Thermal Imaging Study to Determine the Operational Condition of a Conveyor Belt Drive System Structure

et al. 2021

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“…In paper [19] the aim of the experiment was to explore the possibility of using active thermography for testing large-sized building units (with high heat capacity) in order to locate material inclusions. As part of the experiment, two building partition models—one made of gypsum board (GB) and another made of oriented strand board (OSB)—were built.…”

Section: Description Of the Articles Presented In The Issuementioning

confidence: 99%

“…Active thermography can be used in construction for non-destructive materials testing. When the recording of thermograms is conducted for an appropriate length of time, inverse contrasts can be observed (on the same front surface) [19].…”

Section: Description Of the Articles Presented In The Issuementioning

confidence: 99%

Non-Destructive Testing of Materials in Civil Engineering

Schabowicz

2019

Materials

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This issue was proposed and organized as a means to present recent developments in the field of non-destructive testing of materials in civil engineering. For this reason, the articles highlighted in this editorial relate to different aspects of non-destructive testing of different materials in civil engineering, from building materials to building structures. The current trend in the development of non-destructive testing of materials in civil engineering is mainly concerned with the detection of flaws and defects in concrete elements and structures, and acoustic methods predominate in this field. As in medicine, the trend is towards designing test equipment that allows one to obtain a picture of the inside of the tested element and materials. Interesting results with significance for building practices were obtained.

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“…Many solutions propose approaches in which they focus on the reduction of heat loss from buildings. Sustainable construction is also considering paths leading to the reduction of the depletion of natural resources through e.g., the use of passive systems in buildings [3][4][5][6][7]. Mainly concrete and monolithic construction is the most commonly used building method in the world [8,9].…”

Section: Introductionmentioning

confidence: 99%

The Role of Glass Compounds in Autoclaved Bricks

et al. 2020

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This study describes the relationship between the physio-mechanical and chemical properties of sand-lime materials which have undergone hydrothermal treatment, and which were modified through the introduction of glass components (90% glass sand, GS). Process parameters such as temperature, pressure and saturation vapor pressure were found to have a significant impact on the series of chemical reactions as well as on the formation and transformation of solid hydrates. During the stirring process of sand-lime mass, the temperature of the reaction between lime and water in the presence of quartz sand (QS) was determined to be 83 °C. In the presence of glass sand, measured temperature was only 42 °C. Thermodynamic equilibrium-based modelling was applied to predict stable phase assemblages in the studied systems. It was found that compositional modification along with the application of the autoclaving process resulted in the formation of two crystalline phases: natrolite and gyrolite. Compressive strength and density were also assessed. The strength of fresh laboratory samples was found to be greater than their traditional analogues by 15 MPa. In addition to experimental characterization, sand-lime materials were also modeled using neural networks (backpropagation neural network, BPNN) which serve as a universal approximation method capable of modelling complex functions.

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Inverse Contrast in Non-Destructive Materials Research by Using Active Thermography

Cited by 12 publications

References 48 publications

Thermal Imaging Study to Determine the Operational Condition of a Conveyor Belt Drive System Structure

Thermal Imaging Study to Determine the Operational Condition of a Conveyor Belt Drive System Structure

Non-Destructive Testing of Materials in Civil Engineering

The Role of Glass Compounds in Autoclaved Bricks

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