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Article

Mani Senthilkumar and L. Ashok Kumar

The purpose of this paper is to design and develop an instrument for non-destructive fabric grams per square metre (GSM) measurement. This study uses the capacitance…

Abstract

Purpose

The purpose of this paper is to design and develop an instrument for non-destructive fabric grams per square metre (GSM) measurement. This study uses the capacitance principle to obtain the fabric GSM. The relative permittivity of the sample fabrics changes the capacitance value. A relationship between capacitance and GSM that best fits the look-up table is obtained. Also, the developed system is applicable for all kind of fabrics both knitted and woven fabrics. The comparison study was carried out with existing test method.

Design/methodology/approach

The purpose of the study is to design and develop an instrument for non-destructive fabric GSM measurement.

Findings

The proposed non-destructive method of fabric GSM measurement using capacitance principle is designed, developed and tested. Also, the developed system is applicable for all kind of fabrics both knitted and woven fabrics. The comparison study was carried out with existing test method.

Research limitations/implications

The change in capacitance due to relative permittivity of the sample fabric is in pF range (10-12). The system can be further improved by using a capacitance sensor of sensitivity upto 1 fF (10-15). By doing so, the proposed system provides better results in terms of accuracy and resolution. The system developed can be further extended by making it online equipment which measures the fabric GSM instantaneously.

Originality/value

So far there is no non-destructive testing method available for fabric weight measurement. The newly designed and developed instrument is used to test the fabric both woven and knitted non-destructively.

Details

International Journal of Clothing Science and Technology, vol. 28 no. 5
Type: Research Article
ISSN: 0955-6222

Keywords

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Article

Yunjie Li and Kun Li

– The purpose of this paper was to realize a non-destructive examination for printed circuit boards (PCBs) and to obtain an accurate and high-efficient image.

Abstract

Purpose

The purpose of this paper was to realize a non-destructive examination for printed circuit boards (PCBs) and to obtain an accurate and high-efficient image.

Design/methodology/approach

This paper provides an approach to realize a non-destructive examination for PCBs and to obtain an accurate and high-efficient image.

Findings

The result showed that cone-beam computed tomography (CT) image PCB detection based on an interactive cutting method had accuracy and high efficiency and can meet the non-destructive requirement of detection.

Originality/value

The result showed that cone-beam CT image PCB detection based on an interactive cutting method had accuracy and high efficiency and can meet the non-destructive requirement of detection.

Details

Circuit World, vol. 41 no. 1
Type: Research Article
ISSN: 0305-6120

Keywords

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Article

Kostja Makarovič, Anton Meden, Marko Hrovat, Darko Belavič, Janez Holc and Marija Kosec

In this manuscript the purpose is to present and evaluate the developed non‐destructive method for analysing the phase composition of LTCC Du Pont “Green Tape 951”…

Abstract

Purpose

In this manuscript the purpose is to present and evaluate the developed non‐destructive method for analysing the phase composition of LTCC Du Pont “Green Tape 951” material fired in the temperature range from 800 to 1,000°C using X‐ray powder diffraction and Rietveld refinement.

Design/methodology/approach

The method uses the crystalline Al2O3 which is already present in the material as an internal standard since its mass fraction was previously found to be constant in the described temperature range.

Findings

The results of the non‐destructive analyses and the classical destructive analyses are comparable and the estimated error of the destructive phase analyses and the calculated errors for the non‐destructive phase analyses are of the same order.

Practical implications

The described method can be used also for analysing another type of LTCC material. In this case it is necessary to check whether the mass fraction of any crystalline phase present in the sample is constant in the given temperature range, because only in this case can it be used as an internal standard for a determination of the phase composition.

Originality/value

The non‐destructive method is a fast and easy approach for analysing the fired samples and is also suitable for controlling the phase composition of LTCC materials on 3D complex structures without destroying them, just by using the X‐ray diffraction patterns collected from their surface.

Details

Microelectronics International, vol. 30 no. 2
Type: Research Article
ISSN: 1356-5362

Keywords

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Article

The 19th Annual British Conference on Non‐destructive Testing Organised by The British Institute of Non‐destructive Testing at the University of Lancaster on 17–19…

Abstract

The 19th Annual British Conference on Non‐destructive Testing Organised by The British Institute of Non‐destructive Testing at the University of Lancaster on 17–19 September, 1984. The wide ranging papers by eminent authorities will cover the use of robotics in non‐destructive testing, developments in ultrasonic generation and signal processing, real‐time radiography and fluoroscopy, thermography and magnetic particle crack detection. Special sessions will be devoted to condition monitoring, inspection in the aerospace environment and to the role of certification and standards in non‐destructive testing.

Details

Aircraft Engineering and Aerospace Technology, vol. 56 no. 7
Type: Research Article
ISSN: 0002-2667

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Article

Divya Nath K. and Prabhu Ramanathan

The purpose of this paper is to analyze the moisture measurement techniques presently available, as accurate determination of the moisture content (MC) of grains or any…

Abstract

Purpose

The purpose of this paper is to analyze the moisture measurement techniques presently available, as accurate determination of the moisture content (MC) of grains or any food items at right time is very important for its processing, marketing and storing.

Design/methodology/approach

There are basically two types of MC measurement techniques – destructive method and non-destructive method. In the time-consuming destructive method, cleaning of the food items is done and shells of food items like peanuts are removed for which man power is required and so the technique becomes costly. A literature review of the existing non-destructive methods has been done, and the methodology of each approach is explained with the figure. The less time-consuming non-destructive technique used to measure MC require less man power, as grains or food items can be directly used without any process like cleaning or crushing so that the technique become economic.

Findings

Most of the techniques used magnetic or electric properties to measure the MC indirectly. The problem with existing non-destructive technique is that measurement of MC uses only few numbers or grams of grains or food items at a time.

Research limitations/implications

The farmers’ produce large quantity of grains. The small quantity of grains cannot be the representative sample for whole grains produced by the farmers. Most of the techniques use only small quantity of grains or food items at a time to measure the MC which is not accurate and representative of the produce. Also, the techniques are not simple and easily available. The cost of the techniques or arrangement to measure the MC is not reasonable.

Social implications

Most of the farmers in the developing countries are financially backward. To store the agricultural produce, MC of the commodities is a key factor influencing the quality of the storage. Measurement of the MC of the seeds is thus very important for the farmers.

Originality/value

This paper is a review of the previous research that happened in this area, and it would help the researcher to know the techniques already been used. To the knowledge of the authors, the review of the existing moisture measurement of seeds/agricultural commodities is available in the literature.

Details

Sensor Review, vol. 37 no. 1
Type: Research Article
ISSN: 0260-2288

Keywords

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Article

S. Thirunavukkarasu, B.P.C. Rao, G.K. Sharma, Viswa Chaithanya, C. Babu Rao, T. Jayakumar, Baldev Raj, Aravinda Pai, T.K. Mitra and Pandurang Jadhav

Development of non‐destructive methodology for detection of arc strike, spatter and fusion type of welding defects which may form on steam generator (SG) tubes that are in…

Abstract

Purpose

Development of non‐destructive methodology for detection of arc strike, spatter and fusion type of welding defects which may form on steam generator (SG) tubes that are in close proximity to the circumferential shell welds. Such defects, especially fusion‐type defects, are detrimental to the structural integrity of the SG. This paper aims to focus on this problem.

Design/methodology/approach

This paper presents a new methodology for non‐destructive detection of arc strike, spatter and fusion type of welding defects. This methodology uses remote field eddy current (RFEC) ultrasonic non‐destructive techniques and K‐means clustering.

Findings

Distinctly different RFEC signals have been observed for the three types of defects and this information has been effectively utilized for automated identification of weld fusion which produces two back‐wall echoes in ultrasonic A‐scan signals. The methodology can readily distinguish fusion‐type defect from arc strike and spatter type of defects.

Originality/value

The methodology is unique as there is no standard guideline for non‐destructive evaluation of peripheral tubes after shell welding to detect arc strike, spatter and fusion type of welding defects.

Details

International Journal of Structural Integrity, vol. 2 no. 2
Type: Research Article
ISSN: 1757-9864

Keywords

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Article

J.C. VERITE

A 3‐D eddy current code, TRIFOU, has been used to simulate eddy currents flowing around cracks in very thick conductors, which is a fully 3‐D situation. The measurement…

Abstract

A 3‐D eddy current code, TRIFOU, has been used to simulate eddy currents flowing around cracks in very thick conductors, which is a fully 3‐D situation. The measurement set and the probe have also been simulated so that we can compare numerical and experimental output signals. Storage and CPU‐time requirements are detailed and the expectations of such a program in non‐destructive testing are discussed.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 3 no. 3
Type: Research Article
ISSN: 0332-1649

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Article

T.C. Chung and H.A. Moore

Tape automated bonding (TAB) is one technology which is becoming widely adopted for interconnecting integrated circuits to a substrate or package. Both destructive and…

Abstract

Tape automated bonding (TAB) is one technology which is becoming widely adopted for interconnecting integrated circuits to a substrate or package. Both destructive and non‐destructive test methods for evaluation of TAB bonds are analysed and criticised. The key parameters and general guidelines of a destructive beampull test set‐up are identified and presented. The key features of four different non‐destructive test methods are described and discussed. It is found that no universal solution exists for non‐destructive evaluation of TAB bonds although some methods may be more useful than others under certain conditions and constraints. Data and experimental procedure are presented for correlation of scanning laser acoustic microscopy and beampull data.

Details

Circuit World, vol. 16 no. 1
Type: Research Article
ISSN: 0305-6120

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Article

P.W. Sherwood

Considerable headway is being made in the acceptance of non‐destructive testing methods for refinery construction and maintenance. If properly used, these techniques…

Abstract

Considerable headway is being made in the acceptance of non‐destructive testing methods for refinery construction and maintenance. If properly used, these techniques constitute a valuable tool for determining the quality of workmanship (in acceptance tests of refinery equipment) and the survival outlook of installed equipment which may be exposed to mechanical wear, erosion or corrosion. They find further application in locating obstructions which may form in pipelines or other equipment.

Details

Anti-Corrosion Methods and Materials, vol. 4 no. 5
Type: Research Article
ISSN: 0003-5599

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Article

Paschalis Charalampous, Ioannis Kostavelis and Dimitrios Tzovaras

In recent years, additive manufacturing (AM) technology has been acknowledged as an efficient method for producing geometrical complex objects with a wide range of…

Abstract

Purpose

In recent years, additive manufacturing (AM) technology has been acknowledged as an efficient method for producing geometrical complex objects with a wide range of applications. However, dimensional inaccuracies and presence of defects hinder the broad adaption of AM procedures. These factors arouse concerns regarding the quality of the products produced with AM and the utilization of quality control (QC) techniques constitutes a must to further support this emerging technology. This paper aims to assist researchers to obtain a clear sight of what are the trends and what has been inspected so far concerning non-destructive testing (NDT) QC methods in AM.

Design/methodology/approach

In this paper, a survey on research advances on non-destructive QC procedures used in AM technology has been conducted. The paper is organized as follows: Section 2 discusses the existing NDT methods applied for the examination of the feedstock material, i.e. incoming quality control (IQC). Section 3 outlines the inspection methods for in situ QC, while Section 4 presents the methods of NDT applied after the manufacturing process i.e. outgoing QC methods. In Section 5, statistical QC methods used in AM technologies are documented. Future trends and challenges are included in Section 6 and conclusions are drawn in Section 7.

Findings

The primary scope of the study is to present the available and reliable NDT methods applied in every AM technology and all stages of the process. Most of the developed techniques so far are concentrated mainly in the inspection of the manufactured part during and post the AM process, compared to prior to the procedure. Moreover, material extrusion, direct energy deposition and powder bed processes are the focal points of the research in NDT methods applied in AM.

Originality/value

This literature review paper is the first to collect the latest and the most compatible techniques to evaluate the quality of parts produced by the main AM processes prior, during and after the manufacturing procedure.

Details

Rapid Prototyping Journal, vol. 26 no. 4
Type: Research Article
ISSN: 1355-2546

Keywords

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