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EVENTS
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TRAINING & CERTIFICATION
NDT
PERSONNEL TRAINING AND CERTIFICATION SCHEME WHICH COMPLIES WITH
BOTH ISO 9712 & EN 473 STANDARDS.
Magnetic Particle
Testing-Level-II
Date : 14th
to 20th July 2008;
Venue :23
Tuas View Close, Tradelink Park,Singapore-637481
Fees -
Course : S$600.00, Examination:S$200.00
5% Discount for Society Members
Liquid Penetrant Testing
- Level-II
Date : 4th
to 10th August 2008;
Venue :23
Tuas View Close, Tradelink Park,Singapore-637481
Fees -
Course : S$600.00, Examination:S$200.00
5% Discount for Society Members
LATEST
TECHNICAL TALK-22
" Advanced Sensors and
Imaging Technologies for Non-Destructive Inspection of Steel Components"
Dr. B.P.C. Rao
Professor, Homi Bhabha National Institute Head,
EMSI Section NDE Division, Metallurgy & Materials Group Indira Gandhi Centre
for Atomic Research (IGCAR) Kalpakkam, TN - 603 102, India
VENUE : HomeTeamNS ( Formerly known as CDANS COUNTRY CLUB),
THE "CELLROOM", 2 BUKIT BATOK WEST AVE. 7, SINGAPORE 659003; TEL-65697702
DATE : Thursday
12 June 2008;
TIME : 7.30PM - REGISTRATION;
8.00 PM - Technical Talk
9.00PM - REFRESHMENTS
Abstract of the
Technical Talk
The presentation would give an overview of
recent advances in sensors and imaging technologies in eddy current,
ultrasonic, flux leakage, and magnetic non-destructive evaluation (NDE)
techniques. The two important aspects that must be considered while
selecting a sensor for NDE imaging i.e. sensitivity and resolution would be
discussed. The presentation would cover phased-array, patterned, flexible,
rotating sensors and highlights the concept of multi-sensor fusion, wireless
sensing and sensor networks applicable to NDE. The
presentation would highlight on-line testing of components and
mechanical as well electronic scanning based
imaging technologies for fast
automated detection of defects in plates, tubes and welds. Special emphasis
will be given to detection of far-side corrosion, microstructure degradation
and residual stresses by effectively utilising efficient sensors, artificial
neural networks, wavelet transform and image processing methods. Non-contact
NDE of buried pipes, wire ropes, vessels and concrete structures would be
discussed from the perspective of quality assurance and in-service
inspection. Detailed account of remote field eddy current technique for
in-situ inspection of
ferromagnetic steel steam generator tubes would be given.
Short biography of the Speaker
Dr. B.P.C.
Rao is from Indira Gandhi Center for Atomic Research, India working towards
development of Non-destructive Evaluation (NDE) techniques for detection and
characterisation of defects and microstructure variations in steels. He
places due emphasis on sensor development, numerical modelling, digital
signal & image processing, artificial intelligence, automation and component
inspection. He has developed intelligent imaging schemes for automated NDT
of stainless steel components and a comprehensive
technology for stringent quality assurance and reliable in-situ examination
of ferritic steel tubes of steam generators. Dr. Rao developed eddy
current, Giant magneto-resistive (GMR), MEMS, GMI, and micro-Hall sensors
for automated and non-contact examination of components for structural
integrity assessment. He has solved several challenging problems related to
manufacturing and in-service inspection of a wide variety of engineering
components in nuclear and aircraft industry using eddy current, flux
leakage, ultrasonic, Brakhausen emission and other NDE techniques. Dr. Rao
published more than 125 papers in journals and conferences and is a
recipient of several awards. He established successful research
collaborations with Fraunhofer-IZFP & Federal Material Institute-BAM,
Germany; CEA, France; Cardiff & Newcastle Universities, UK; and Iowa State &
Michigan State Universities, USA. Currently, he heads the electromagnetics,
modelling, sensors and imaging section in Kalpakkam
TECHNICAL
TALK-21
"Nondestructive
testing with high intensity ultraviolet light"
Speaker :Mr.
Bo Pang ,Area Manager ,Labino
AB
VENUE : HomeTeamNS ( Formerly known as CDANS COUNTRY CLUB),
THE "CELLROOM", 2 BUKIT BATOK WEST AVE. 7, SINGAPORE 659003; TEL-65697702
DATE : Friday
2 May 2008;
TIME : 7.00PM - REGISTRATION;
7.30PM - Technical Talk
9.00PM - REFRESHMENTS
Topic abstract:
Nondestructive
testing with high intensity ultraviolet light: Mercury Vapor versus
microdischarge lamps
The major difference bewteen an old mercury vapour ultraviolet-A lamp
and a microdischarge ultraviolet-A lamp is seen in their performance.
Mercury vapour UVA lamps can injure the technician and have negative
effects on the environment. Since magnetic particle and liquid penetrant
testing became standard practice, traditional UVA lamps have been used.
They are typically fitted with a 125 W, self-filtered, mercury vapour
bulb. Amercury vapour UVA lamp requires 15 minutes to reach its full
effect. If the lamp is exposed to magnetic fields, it will shut off,
needing 10 to 15 minutes to cool off and another 10 to 15 minutes to
warm up again. as a result of the long period of recovery, the lamps are
normally left on for long periods of time, not only heating the entire
workplace but also contributing to excessive energy consumption. The
bulbs are heavy and fragile with comparatively short service lives.
In addition to the abovementioned negative characteristics of the
mercury vapour UVA lamps is the inferior effect of the lamp. It’s
impossible to work in daylight and the very low intensity of the light
markets it harder to detect discontinuities.
Microdischarge UVA lamps have an unbeatable ultraviolet intensity. This
creates new possibilities, for example testing in normally lit areas,
even outdoors in daylight with maintained contrast to background and
maximized probability of detection. Quality and safety are improved and
time of testing is reduced.
The very low output power of a microdischarge UVA lamp (approximately 35
W) gives low heat generation and energy consumption. There is no need
for cooling fans, crating a pleasant work environment and reducing
energy costs. Its immediate start and restart, with full power in
approximately 10 s, saves time. Unaffected by magnetic filds, the
technology is higly suitable for magnetic penetrant testing. Some lamps
are dust-tight and temporary water jetting proof. This makes it possible
to operate the lamps during rough conditions and even outdoors. The high
quality ultraviolet filter used in the lamps will not crack if exposed
to fluids.
Technical Talk 20
"Advanced instruments for automatic, semiautomatic, and manual
ultrasonic inspection and use of them in lieu of radiography"
Speaker :Dr.
Garri Passi - Chief Scientist and General Manager of SONOTRON NDT,
Israel
ABSTRACT
This technical talk will discuss the
various possibilities / instruments available in the market for
replacing RT with UT in compliance to code ASME 2235 case 9 and other
applications. The talk will emphasise on advantages / limitations of
various UT principle such as Pulse Echo, Phased Array and TOFD. The talk
will also cover manual vs automatic scanning methods. Phased Array and
multichannel flaw detectors will be used for demonstrating various
techniques.
ABOUT THE SPEAKER
Dr. Garri Passi is the Chief Scientist and General Manager of SONOTRON
NDT, Israel and has more than 25 years of experience in the design and
development of various types of ultrasonic instrument
Technical Talk 19
"
Advanced techniques for maintenance NDT"
Speaker :
Dr. Tjibbje Bouma-Business
unit manager Asia of Applus RTD
VENUE : HomeTeamNS ( Formerly known as CDANS COUNTRY CLUB),
THE "CELLROOM", 2 BUKIT BATOK WEST AVE. 7, SINGAPORE 659003; TEL-65697702
DATE : Friday
28 September 2007;
TIME : 7.00PM - REGISTRATION;
7.30PM - Technical Talk on "
Advanced techniques for maintenance NDT"
9.00PM - REFRESHMENTS
Abstract
Due to
advances in NDT and technology new techniques are available that provide
efficient solutions for quick screening as well as detailed inspection
of industrial plant. This not only allows to cover larger parts of the
facilities, which is essential for application of risk based inspection
regimes. In addition it creates the opportunity to move part of the NDT
inspection program out of the shutdown period, creating less congestion
and planning problems during shutdown and allowing proper planning of
maintenance actions and replacements during the shutdown. An overview
will be given of a number of available techniques addressing their
strengths and limitations.
About
the Speaker
Dr.
Tjibbe Bouma, Business unit manager Asia of Applus RTD, graduated from
Utrecht University in the Netherlands and completed a PhD on high
frequency ultrasonics. In 1993 he joined RTD bv in the Netherlands
developing TOFD and AUT applications. He later moved on as project
manager for AUT inspection in pipelines and department manager for
special NDT projects. In 1999 he became manager of RTD corporate
technical development centre. He left RTD in 2002 and founded Vantage
NDT, specializing in the development of advanced NDT applications. In
2007 Vantage NDT was acquired by Applus RTD group and as of August of
this year Dr. Bouma is living in Singapore, responsible for the
activities of Applus RTD in Asia.
Technical Talk 18
"
Sonic Inspection Techniques for In-Service Composite Aircraft Structure
Inspection"
Speaker :
Dr Suresh Perinpanayagam-
Singapore Institute of Manufacturing Technology (SIMTech), 71 Nanyang
Drive, Singapore 638075
VENUE : HomeTeamNS
( Formerly known as CDANS COUNTRY CLUB),
THE "CELLROOM",
2 BUKIT BATOK WEST AVE. 7, SINGAPORE 659003
TEL-65697702
DATE :
Friday 27 July 2007
TIME : 7.00PM -
REGISTRATION
7.30PM -
Technical Talk on "
Sonic Inspection
Techniques for In-Service Composite Aircraft Structure Inspection"
About the Speaker
Dr
Sureshkumar Perinapanayagam received his Master in Aeronautical
Engineering and PhD in Mechanical Engineering from Imperial
College,London. He first started work with Ford Product Development
Centre in the UK before pursuing his PhD programme at the Centre for
Vibration,Imperial College, London. His PhD research was accomplished in
collaboration with Rolls Royce UK Ltd. He has recently been
grantedconsiderable funding from A*STAR, Boeing, EADS, Rolls Royce and
Prattand Whitney to develop Resonance, Pitch/Catch and Impedance
InspectionTechniques for In-Service Composite Structure Inspection.
Abstract
SIMTech and
Singapore's Science and Engineering Research Council (SERC) recently
launched the Aerospace Programme which aims to engage the rapidly
growing aerospace industry with the Singapore R&D community to drive
innovation in aerospace research.
This programme
is to be funded by SERC of A*STAR and the big four aerospace companies,
Boeing, EADS, Rolls Royce and Pratt & Whitney. Sonic inspection is one
of the four projects which received significant funding from the big
four aerospace companies.
The current
ultrasonic techniques, such as “C”-scan, that are widely used in
aircraft structure non-destructive inspection need two-sided access,
i.e. top and bottom, or a good bottom reflection surface to inspect the
aircraft structure. For many aircraft structures, getting access to both
sides of the structure, without taking the structure apart, is a
technical conundrum.
Also, composites are being increasingly used in commercial aircrafts for
potential economic savings from increased payload and flight distance.
The attenuation of ultrasonic waves, due to absorption and scattering,
is high in composite structures. This will create serious problems with
fibre-reinforced layers and honeycomb structures, when current one-sided
ultrasonic inspection, such as pulse-echo, is used.
In this project,
the less utilised Sonic Non-Destructive Inspection (NDI) techniques
(resonance & mechanical impedance) would be used to identify defects in
composite laminates and bonded honeycomb sandwich aircraft structures
using one side of the structure. These techniques would be investigated
not only to detect different types of disbonds and their bond strength
but also to investigate the “kissing bonds”, which is still a challenge
in non-destructive inspection. Furthermore, these techniques would be
evaluated to identify heat damage in composite aircraft structures due
to lightning strikes, jet engine exhaust, etc.
In addition, the
viability of a portable sonic system would be explored in this project
such that in-service inspection can be performed without dismantling the
aircraft structure.
Technical
Talk 17
" Development of new NDT
Certification Scheme in Singapore"
SPEAKER : S. K. Babu, FHKICA, RLA,
MInstNDT, MIAQP, MWJS
VENUE : HomeTeamNS ( Formerly known as CDANS COUNTRY CLUB),
THE "CELLROOM", 2 BUKIT BATOK WEST AVE. 7,SINGAPORE 659003
DATE : Friday 13 April 2007
About the Speaker
Mr. Babu
is working as Systems Auditor Asia/Australia within VSL Singapore Pte
Ltd & NDE Specialist for the VSL Asiapac since 1999. Mr. Babu holds a
Bachelor of Science in Mechanical Engineering, ASNT NDT Level III in
RT,UT,MT,PT,VT,ET,IR & NR, ACCP Level III in RT,UT,MT &PT, CSWIP SWI,
BGAS/CSWIP Gr.2 Painting Inspector & Registered Lead Auditor - QMS
Mr. Babu
also a FELLOW Member of Hong Kong Institute of Certified Auditors,
Member of BINDT, WJS, ASNT, & Committee Member for the Welding & Joining
Group of Hong Kong Institute of Steel Constructions (HKISC).
He had
over 14 years of experience in NDT Training & Certification & delivered
lectures in India, Qatar, Malaysia & Hong Kong. He had presented over 10
papers for National & International conferences.
Mr. Babu
is currently the key member for the development of Singapore NDT
Certification Scheme.
Abstract:
NDE
Certification system varies globally from countries to countries. A
proper certification system is required to produce successful NDT
Practitioners to suit the local industry.
The
current system in Singapore is discussed in this presentation & detailed
the status of accredited NDT operators, Compared the system in
Neighboring Regions, Discuss the international NDT Certification Scheme.
This paper outlines the development of Singapore NDT Certification
Scheme (SGNDT), the operations, Levels of Qualification, The Method of
operation & control measures. The Training & Certification committee,
Detailed
Quality Management system within the certification scheme,
Conclusion: This Paper Aims to deliver why the need of New certification
scheme, Operation Procedures, QA system, Training & Examination
requirements
Acknowledgement:
The
Author wish to thank the following committee members from NDTSS for
their contribution for preparing key quality assurance documents for NDT
certification Scheme
1. Prof.
Brian Wong
2.
Mr.K.G.Prabhakaran
3.
Mr.Kuppuswamy
4.
Dr.Muthu
|
Till June 2005
|
Technical Talk 16
AUTO UT ON PIPE LINE
USING ROTO SCANNER
SPEAKER:
Speaker; Mr Mark Werner; Operation Manager North America;
Applus RTD Project Services’Houston, USA
VENUE : M/S
Applus RTD Pte Ltd, No 23, Tuas View Close:
DATE:FRIDAY 16th February 200707
2nd NDT Corrosion & Management
Conference and Exhibition 2006
Jointly
organized by PetroMin and Non-Destructive Testing Society(Singapore) and
supported by BINDT, AINDT & NACE
7th - 8th Dec 2006,
Orchard Hotel, Singapore
website
www.safan.com
Kindly visit
weblink for
details of the delegate fees.
Delegate fee: NDTSS Members S$600.00
TECHNICAL
TALK-15
3rd
November 2007
Title:Optical
Non-destructive Testing methods for engineering applications
Dr. V M Murukeshan
Associate Professor,
School of Mechanical and Aerospace Engineering
Nanyang Technological University ,Singapore
Abstract
Non-destructive testing (NDT) is a vital process in most
branches of engineering to ensure the structural integrity of components.
There are many NDT techniques available which can be broadly classified as
optical and non-optical. While most of the non-optical techniques or
methodologies are well practiced in industries, their optical analogues are
rapidly replacing the conventional approached due to the tremendous
advantages they offer.
This talk mainly concentrates on the various Optical NDT
aspects and their relevance to various engineering applications. We will be
briefly covering the working principles with test examples of various
optical NDT methods such as Holography, TV Holography/ DSPI, Shearography/
Digital shearography followed by optical fiber based NDT approaches.
Finally, we will explore the sequential implementation of some of these
methodologies for certain specific applications with a brief look into the
future.
Speaker:
Dr. VM Murukeshan received the Masters and M.Phil.
degrees with specialization in Quantum Electronics from Cochin University of
Science and Technology [CUSAT, India] and the Ph.D degree from the Applied
Optics Laboratory, Indian Institute of Technology, Madras in 1988, 1991, and
1997 respectively. He was awarded the DAAD fellowship in 1993 as part of
his doctoral program, with which he was attached (1993-95) to the
Universitaet Oldenburg, Germany. He is the Associate editor of international
journal of Optomechatronics and member, editorial board of
international Journal of Holography and Speckle. He has also guest
edited international journal special issues and has developed or chaired
sessions at numerous international conferences. He holds 3 patents and has
published over 120 research articles in peer reviewed international journals
and conference proceedings. He is currently at the School of Mechanical and
Aerospace Engineering, where he is working as an associate professor. His
current research interests are focused on Optical NDT for engineering and
bio applications, Bio-Optics for medical and forensic applications, Applied
optics, Fiber optic sensors and Bio-sensors, and Optical MEMS.
Technical Talk-14
6th October 2006
TITLE: SAC SINGLAS ACCREDITATION SCHEME
Abstract
What
are the values of Accreditation? What are the differences between
Certification and
Accreditation has garner more recognition with the
opening up of the global
market in terms of market access for both the
vendors and manufacturers. A
brief overview of Singapore Accreditation
Council, the national
accreditation body in Singapore and how the
accreditation schemes have
benefited our industries across various sectors.
Speaker:
Jason Tan
Head
(Inspection)
SAC
Secretariat
SPRING Singapore
Direct : +65 6279 1862
Fax :
+65 6272 1937
E-mail : jason_tan@spring.gov.sg
4th AGM and Technical Talk-13
The 4th Annual General Meeting of
the Non-Destructive Testing Society Singapore (NDTSS) will be held on
Friday, 4th August 2006 at 19.30 hours at the HomeTeamNS (formerly known as
CDANS COUNTRY CLUB), 2 Bukit Batok West Ave. 7, Singapore 659003, Cell
Room. The meeting will be followed by aTechnical Talk and Dinner at
HomeTeamNS restaurant.Some of the council members will be stepping down and
seeking re-election. Enclosed is the Nomination form which shall be
submitted to NDTSS not later than 2nd August 2006. Please be reminded that
only Ordinary Members or Corporate Members may be nominated and must
be proposed by two Ordinary or Corporate Members.
AGM AGENDA:
1. To Confirm the Minutes of Annual General Meeting
(AGM) held on 13th August 2005.
2. Presentation of the Annual Report of the Council
3. Statement of Accounts and Balance Sheet for
2005/2006
4. Voting in of new Committee Members
5. Election of Honorary Auditor
6. Technical Talk
7. Dinner
VENUE : HomeTeamNS,
THE “CELLROOM”,
2 BUKIT BATOK WEST AVE. 7,SINGAPORE 659003'TEL-65697702
DATE : FRIDAY 4th August 2006
TECHNICAL
TALK -13
Date 4th
August 2006
Title:
Technical Evaluation of Real-Time Digital Radiography Systems for the RSAF
Aircraft Non-Destructive Inspection Applications
Khoo Jason, Tui Chen Guan
Republic of Singapore Air Force
Wong Brian Stephen, Bai Wei Min, Wang Xin
Nanyang Technological University
Foo Frederic
ST Aerospace Ltd
Abstract
The technical evaluation of real-time digital radiography is carried out as
part of the feasibility study for the development of an automated Real-Time
Digital Radiography (RTDR) aircraft inspection system. RTDR is gaining
popularity due to significant reduction in operational costs, i.e. films and
its processor cost, chemicals cost and storage cost; and has the obvious
benefit of producing real-time images with integrated expert software for
interpretation. But RTDR is generally less sensitive than conventional film
radiography, hence objective testing to ensure the identified RTDR equipment
meets the high sensitivity of aerospace standards are essential. The
selection process to identify suitable RTDR equipment that meets the RSAF
criteria for aircraft application is discussed in this paper.
Main
Speaker:
Captain
Jason Khoo / RSAF
Captain
Jason Khoo is a structures engineer at Air Logistics Department (ALD) in HQ
RSAF. He is also a member of Non-Destructive Evaluation Knowledge Centre in
ALD and he assists in NDE-related projects as well as NDE policies and
training.
Second
Speaker:
Dr B S
Wong
Dr Wong is
a lecturer in the Division of Aerospace Engineering, Nanyang Technological
University.
Technical Talk 12
by Mr. Kuppusamy, ASNT NDT Level-III
Topic: Ultrasonic Testing of Austenitic
Stainless Steel
Date : 30th June 2006
About Speaker
Mr.N.Kuppusamy
is a NDT Level-III with 22 years of hands on experience in NDT &
Inspection activities. His experience include broad spectrum of industries
and projects spread across India, Saudi Arabia, Malaysia, Singapore and
Myanmar. He is well known for his specialization in Ultrasonic Testing
especially in TKY joints testing. Currently he holds ASNT NDT
Level-III in 7 methods.
He earned his Bachelor
of Science degree from the University of Madras and co-authored technical
articles in Saudi Aramco’s Journal of Technology (International Magazine)
featuring UT Evaluation of MFL Indications & Project Planning using
Critical Path Method (CPM).
TECHNICAL TALK-11
|
Convened on |
: |
19th May 2006 |
| Time |
: |
19:00 hours -
21:00 hours |
| Venue |
: |
CDANS COUNTRY CLUB, 2 Bkt Batok West Ave 7,
Singapore |
| Topic |
: |
PAINT
INSPECTION |
Speaker: Mr Andy Foo
Regional Sales Director
of Elcometer (Asia) Pte Ltd,
the regional sales &
service center of Elcometer Instruments Ltd UK
www.elcometer.com)
Topics
Covered
-
Various aspects of Inspection on substrates and coatings:
- Surface Profile & Cleanliness;
- Climatic Condition ;
- Coating : Wet Film Thickness
measurement;
- Coating : Dry Film Thickness measurement;
- Porosity (Pinhole & Holiday) Detection;
- Adhesion
TECHNICAL TALK-10
|
Convened on |
: |
21 April 2006 |
| Time |
: |
19:00 hours -
21:00 hours |
| Venue |
: |
CDANS COUNTRY CLUB, 2 Bkt Batok West Ave 7,
Singapore |
| Topic |
: |
EMATs, Guided Waves and Their Uses in NDT
|
Bruce W. Maxfield, PhD -Visiting
Faculty Indian Institute of
Technology Madras Centre for
Non-Destructive Testing
www.cnde-iitm.org
Abstract
Each
year, EMATs are finding more applications in NDT and materials
characterization. EMATs are used for generating a wide variety of elastic
waves in metals. The most effective use of EMATs requires an understanding
of the quite different instrumentation requirements for EMATs when compared
to those of piezoelectric transducers. Although EMATs have been used for
many purposes, one of their major uses is for inspection of both new and
in-service plates, pipes and tubes. The most interesting of these methods
uses guided waves. Guided waves are much less common for NDT and materials
characterization than the more standard bulk longitudinal and shear waves.
This talk describes the differences between EMAT and piezoelectric
transducers and how these differences influence the instrumentation that is
used with them. The use of guided waves and EMATs for several NDT
applications is discussed. If time permits, other uses of guided waves and
special uses of conventional transducers will be discussed.
About the speaker
Education
Rutgers University, New
Brunswick NJ, Ph. D Physics
University of Alberta,
Edmonton AB, B. Sc. in Physics with Honors
College of Alameda, classes in
computers, operating systems and programming
Proficiencies:
NDT:
ultrasonics, eddy current, MFL, materials characterization and EMATs.
Environmental
Remediation: bioremediation, electro-flocculation, UV treatment.
Physics: teaching, solving
difficult measurement and analysis problems.
Mathematics: teaching,
developing models for real systems.
Other: working with personal computers, including data acquisition. I
have written 100’s of reports, published 68 papers and I have 6 patents.
TECHNICAL TALK-9
|
Convened on |
: |
16th February-2006 |
| Time |
: |
19:00 hours -
21:00 hours |
| Venue |
: |
CDANS COUNTRY CLUB, 2 Bkt Batok West Ave 7,
Singapore |
| Topic |
: |
AUTOMATED
DETECTION OF WELDING DEFECTS IN RADIOGRAPHIC IMAGES |
NDTSS organized the above technical talk and
committee meeting on Feb 16, 2006.
Speaker: Ms Wang, Xin
School of Mechanical and
Aerospace engineering
Nanyang
Technological University
Abstract
Radiographic
testing method is often used for detecting welding defects as a
non-destructive testing method. Due to the degraded quality and the small
size of the defects, X-ray films are sometimes difficult to inspect. The
interpretation of such images is often affected by a human operator's
subjectivity. Digital image processing techniques allow the interpretation
to be automated.
In this study, an automatic detection system to
recognize welding defects in radiographic images is presented. After
obtaining the digital radiographs, the morphological enhancement and
adaptive wavelet thresholding are applied to improve the quality of the
radiographic image. Different methods for improving the quality of
radiographic images are investigated. Through comparative analysis, the
morphological enhancement and adaptive wavelet thresholding can enhance
quality of radiographic images better. A key step in the automated
interpretation process is the segmentation of indications from the
background. In this study, multi-level thresholding based on fuzzy entropy
and genetic algorithm is proposed. The radiographic image is segmented using
multi-level thresholding based on maximum fuzzy entropy. The procedure to
find the optimal thresholds is implemented by a genetic algorithm, which can
overcome the computational complexity problem. The results show this
algorithms can succeed to segment welding defects present in radiography
contrary to conventional methods. After two group features: texture features
and morphological features are extracted. A feature selection and
classification system based on the support vector machine is proposed to the
defect recognition. The top 16 best features are selected and used as inputs
to a designed SVM classifier. Using this method, 98% of the existing flaws
are detected with 15% of false alarms. The behavior of the proposed
classification method is compared with various classification techniques,
k-means, linear discriminant, k-nearest neighbor classifiers and feed
forward neural network, which have been used in the past. The results show
the proposed system based on the support vector machine has the best result.
These results show the efficiency of the system in defect detection.
About the speaker
Ms Wang, Xin received the Bachelor degree from
Taiyuan Heavy Machinery Institute, China, in 1999, and Master degree from
University of Science and Technology Beijing, China, in 2002. She joined
Nanyang Technological University in 2002 as a research student under
supervision of Associate Professor Brian Stephen Wong. She has published
several papers in Research in Nondestructive Evaluation, INSIGHT, The
e-Journal of Nondestructive Testing.
AGM-05 THE 3rd ANNUAL
GENERAL MEETING
The 3rd Annual General Meeting of the Non-Destructive Testing Society (NDTSS)
was held on Saturday, 13th of August 2005 at 19.00 Hours at the CDANS
COUNTRY CLUB, 2 Bukit Batok West Ave.7, Singapore 659003, CELL ROOM. The AGM
meeting was followed by a TECHNICAL TALK and DINNER AT CDANS Restaurant.
AGM 2005 - AGENDA:
1. To
confirm the Minutes of Annual General Meeting (AGM) held on 30th July2004.
2.
Presentation of the Annual Report of the Council.
3.
Statement of Accounts and Balance Sheet for 2004/2005.
4.
Voting in of new committee Members.
5.
Election of Two Honorary Auditors.
6.
Technical Talk on
Ultrasonic
Testing –Weld inspection using AWS D1.1: 2004.
7.
Dinner.
8.
End with Thanks
TECHNICAL TALK-8
|
Convened on |
: |
Saturday, 13th August 2005 |
| Time |
: |
19:00 hours -
21:00 hours |
| Venue |
: |
CDANS COUNTRY CLUB, 2 Bkt Batok West Ave 7,
Singapore |
| Topic |
: |
Ultrasonic Testing of Weldments
according to D1.1 |
Aspects covered :
v
Difference
between AWS D1.1 and D1.1M
v
Completing
Form D-11 (Annex D)
v
Determine
the proper transducer(s) needed for testing a weld.
v
Calibration using an IIW, V1 (rumpus), and DSC block.
v
Scanning
for discontinuities.
v
Calculate
size and location of a discontinuity.
v
Accept/Reject evaluation of a discontinuity.
v
AWS
D1.1:2002 Vs 2004 Edition
About Speaker
Mr.N.Kuppusamy
is a NDT Level-III with 22 years of hands on experience in NDT &
Inspection activities. His experience include broad spectrum of industries
and projects spread across India, Saudi Arabia, Malaysia, Singapore and
Myanmar. He is well known for his specialization in Ultrasonic Testing
especially in TKY joints testing. Currently he holds ASNT NDT
Level-III in 7 methods.
He earned his Bachelor
of Science degree from the University of Madras and co-authored technical
articles in Saudi Aramco’s Journal of Technology (International Magazine)
featuring UT Evaluation of MFL Indications & Project Planning using
Critical Path Method (CPM).
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