Inner Profile Measurement for Pipes Using Penetration Testing

Ross, Robert; Baji, Avinash; Barnett, Dean

doi:10.3390/s19020237

Cited by 7 publications

(6 citation statements)

References 10 publications

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“…Previously, we introduced a novel approach to sewer concrete pipe condition assessment using semi-automated penetration testing [15,16], which involves driving an instrumented rod into a material of interest. Penetration testing itself has a long history.…”

Section: Introductionmentioning

confidence: 99%

Characterising Penetrometer Tip Contact during Concrete Condition Assessment

Hall

Stumpf

Baji

et al. 2022

Sensors

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Concrete condition-assessing penetrometers need to be able to distinguish between making contact with a hard (concrete) surface as opposed to a semi-solid (corroded concrete) surface. We investigated whether different shaped tips of a cylindrical penetrometer were better than others at maintaining contact with concrete and not slipping. We designed a range of simple symmetric tip shapes, controlled by a single superellipse parameter. We performed a finite element analysis of these parametric models in SolidWorks before machining in stainless steel. We tested our penetrometer tips on a concrete paver cut to four angles at 20∘ increments. The results indicate that the squircle-shaped tip had the least slippage when used for concrete condition assessment.

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Section: Introductionmentioning

confidence: 99%

Characterising Penetrometer Tip Contact during Concrete Condition Assessment

Hall

Stumpf

Baji

et al. 2022

Sensors

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“…Recently, various nondestructive testing (NDT) methods [8,9] and structural health monitoring (SHM) approaches [10,11] are applied to detect metal cracks [12] in the early stage of welded structures, including penetration testing (PT) [13], magnetic testing (MT) [14], x-ray radiography [15], eddy current testing (ECT) method [16,17], acoustic emission (AE) [18], ultrasonic techniques [19] and other methods [20]. However, the PT and MT are mainly for the defects on the surface or near surface of materials and not applicable to buried or undersurface defects.…”

Section: Introductionmentioning

confidence: 99%

A feasibility study on monitoring of weld fatigue crack growth based on coda wave interferometry (CWI)

Zhou

Huo

Chen

et al. 2021

Smart Mater. Struct.

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Fatigue induced cracks in welds may result in the failure of welded structures and therefore it is important to detect the fatigue crack in the early stage. In this paper, we proposed a coda wave interferometry (CWI)-enabled fatigue cracks detection method using piezoceramic transducers. Because of its high sensitivity to the tiny change in the medium, the CWI method employs the multiple scattered coda waves to detect the slight change of welding fatigue cracks. Firstly, a theoretical model is developed by combining the CWI theory with the acoustoelastic effect. The derivation shows that there is a linear relationship between the crack width change and the coda wave relative velocity variation. To verify the correctness of the derived result, the CWI technique is applied to the detection of micro fatigue cracks of three butt welded specimens under fatigue loading. Experimental results show that the relative velocity variation of coda wave increases linearly with the increase of the width of welding fatigue cracks. In addition, energy-based active sensing (EAS) approach was also used as a comparison. Compared with the EAS method, the CWI technique is more sensitive to slight changes of welding fatigue cracks and therefore holds a great potential for the monitoring of micro fatigue crack in the early stage.

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“…Existing constrained robotic operating environments cover a wide range including infrastructure sectors (e.g. sewer pipe [7,26], bridge [30] or HVAC inspection [3]), disaster management [13,21] and powerline inspection [24]).…”

Section: Introductionmentioning

confidence: 99%

WomBot: an exploratory robot for monitoring wombat burrows

et al. 2021

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In this study we evaluate the design and efficacy of Wombot, an exploratory robot used to study environmental conditions within wombat burrows. Our purpose-built robot traverses through the difficult terrain present in wombat burrows whilst facilitating placement and retrieval of environmental data loggers. Our preliminary results suggest that the environmental conditions present within the burrows would result in a long mite survival time which shows significant risk for spreading infestations throughout a wombat population. Article Highlights Wombats live in difficult to observe burrows and suffer from mange cased by Sarcoptes scabiei. A teleoperated robot was designed to traverse the difficult terrain within burrows whilst placing and retrieving environmental loggers. Cool and humid environmental conditions within burrows suggest a relatively long mite survival time of 16–18 days

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Inner Profile Measurement for Pipes Using Penetration Testing

Cited by 7 publications

References 10 publications

Characterising Penetrometer Tip Contact during Concrete Condition Assessment

Characterising Penetrometer Tip Contact during Concrete Condition Assessment

A feasibility study on monitoring of weld fatigue crack growth based on coda wave interferometry (CWI)

WomBot: an exploratory robot for monitoring wombat burrows

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