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Paper Abstracts of 2009 FENDT
Source:    Publish Time: 2009-07-28 22:48   2139 Views   Size:  16px  14px  12px
【AE001】Application of Metal Magnetic Memory Technology in Oil SystemsChen Jingui (Xiamen IDEA Electronic Technol

【AE001】Application of Metal Magnetic Memory Technology in Oil Systems
Chen Jingui
(Xiamen IDEA Electronic Technology Co., LTD., 361008)
Abstract: Introduced to new NDT method---Meter Magnetic Memory Testing Technique, which is fast solved testing about pumping rod in the work. This theory main particular explain the principle, implementation of the program, flaw judge.
Keywords: Meter Magnetic Memory In-service Testing Non-destructive Testing
【AE002】Application of Ultrasonic Time-of-flight Diffraction Technique in China
Ding Shoubao, Liu Fujun, Hu Dongming, Guo Xiaolian, Kong Shuai
(Zhejiang Provincial Special Equipment Inspection and Research Institute, Zhejiang Province, Hangzhou, 310020)
Abstract: With the characteristics of high reliability, high quantitative precision, low cost and high efficiency, the time of flight diffraction (TOFD) technique is widely applied to many aspects such as boiler, pressure vessel and pressure piping inspection since 1970s. In this paper, the application of TOFD technique in china is introduced and discussed. The principle of TOFD is introduced, in which the advantages and disadvantages are pointed out. And the large project cases in china that used the TOFD technique are enumerated. Then, the application and the problems of the TOFD technique used in thin-wall plate, high-thickness pressures vessels and the power station boilers are discussed in detail. Compared with other ultrasonic techniques, the TOFD is fit for pressure vessels and boils much more. Finally, the existing standards and development trend of standards about TOFD in china are enumerated. Furthermore, we believe that homemade research on key technique and equipment is the important development direction in future in China.
Keywords: ultrasonic; TOFD technique; longitudinal wave; defect; standard
【AE003】Selected Highlights from 50 years of NDE Evolution
Donald O. Thompson
Scientific Advisor to the Director, Institute for Physical Research and Technology
Founding Director, Center for NDE
Distinguished Professor Emeritus of Aerospace Engineering
Abstract: NDE for flaw detection/characterization has undergone an evolutionary change over the past 50 years. In the U.S. it has moved from a strategy of zero defects to a damage tolerant strategy in which it is assumed that the part will contain defects but that they will be less than a critical size as defined by material properties and expected stress levels encountered in service. It has also been realized that considerable cost benefits can be obtained by moving NDE considerations for a part to the front of the manufacturing process and incorporating NDE into design and process control. In this talk, selected events from the past 50 years that have been influential in promoting this paradigm shift will be noted, and highlights of research advances that resulted from them and that form a part of the new paradigm will be discussed. These advances have resulted in new computational tools (simulations of the NDE process) for UT, X-ray, and EC as well as new instrumentation particularly suited to quantitative process control and field measurements. Applications of both will be discussed. Finally, a few words on a world-wide collaboration in NDE, the World Federation of NDE Centers, will be discussed.
【AE004】Large-sized vessel detecting realized by connecting AE units
Duan Qingru, Ma Juan, Zhu Qin, Chen Moucai
(Beijing Crahesion Science & Trade Co. Ltd, Technical department, Beijing 100043, China)
Abstract: In the detecting of large-sized vessel, because lack of acoustic emission channels, the manner connecting AE units was adopted. According to the location principle, the number of channels was calculated. The different version AE units of the same manufacture were connected as one unit. The detecting result combining with vessel configuration and using condition were analyzed. Thus it can be seen that connecting AE units to detect large-sized vessel is feasible, and the detecting effect is ideal.
Keywords: Acoustic emission detecting; Large-sized vessel; Units connection;
【AE005】The latest progress and developing direction of Acoustic Emission Technology
Fengjing Xu
Physical Acoustics Corporation(PAC) Beijing Office
Abstract: This paper introduces the main application branch and the latest progress of Acoustic Emission Technology, including inspection, evaluation and long term online monitoring for special equipment, pressure equipment, crane device and bridge ect. It also indicates the developing direction of Acoustic Emission application.
Keywords: Acoustic Emission, Structure Healthy Monitoring
【AE006】Sound Source Location Error Analysis of Acoustic Emission Technique for Thick-wall Pressure Vessel
Fujun Liu, Dongming Hu, Shoubao Ding, Shuai Kong, Xiaolian Guo
(Zhejiang provincial Special Equipment Inspection and Research Institute, Zhejiang Province, Hangzhou, 310020)
Abstract: Acoustic emission (AE) technique has been widely applied to pressure vessel and piping inspection. Sound source location analysis plays an important role in the whole AE inspection and evaluation process, how to improve the location precision to an extent is the research focus all over the world. For AE sound source location of pressure vessel and piping, the arrival-time difference location method is mainly used, i.e. compute arrival-time difference which sound source signals arrive at different sensors to determine the sound source location. If an active sound source is on the internal surface or in the wall not on the external surface of thick-wall pressure vessels, the location error obviously exists because of the wall thickness influence. In this paper the sound source error for thick-wall pressure vessels is deduced in detail, the sound source location error formulas are founded and the change law of location error with the wall thickness is analyzed and discussed too. The results indicate that the location errors in the experiment are both in good agreement with those in theory with a maximum relative error of 7.12%. Furthermore, when the thickness is less than 600mm, it is proposed that about 200 mm radius area around the source location should be rechecked by normal nondestructive testing methods to determine the actual source location by AE inspection.
Keywords: acoustic emission, thick-wall pressure vessel, flaw location, location error
【AE007】Application of acoustic emission testing technology in nuclear power plant
Gang Wu, Jiawei Sun
Abstract: This paper introduced the basic theory, purpose and characteristics of the acoustic emission testing technology. We summarized the practical applications of top and bottom head penetration pieces areas of reactor pressure vessel (RPV) which is unapproachable, using emission testing technology and stabilizer electric heating elements penetration pieces areas using acoustic leakage monitoring technology during the major loop systems hydrostatic test period at PSI and ISI of PWR nuclear power plant.
Keywords: Acoustic emission testing; hydrostatic test; Leakage; nuclear power plant
【AE008】A Example of Detection of Fatigue Flaws on the Inner Bending Surface of the Crane Hock
Gu Ran
(Jingsu Province Special Equipment Safety Supervision Inspection Institute Wuxi Branch, Wuxi, 214171)
Abstract: Summarizing a example of Magnetic Particle Testing, which discover several fatigue flaws on the inner bending surface of the hock of the crane that was used to life molten steel package, with the cable winding and stick method. Recounting the technology and procedure of the flow detection and the treatment after the detection on the flow. Discussing the technical risk of the current inspection regulation.
Keywords: Cable winding method; Hock of crane; Treatment of fatigue flaw
【AE009】An Introduction to the Control System of A Reactor Pressure Vessel Inspection Machine
Huang Sanao, Wang Bin, Lin Ge, Jin Guodong
(CGNPC Inspection Technology Co., Ltd, Suzhou 215004, China)
Abstract: The Reactor Pressure Vessel Inspection Machine (TIME machine) comprises ultrasonic inspection system, video inspection system and mechanical machine. These systems and equipment can not be separated from the work of the control system. To comply with the special requirements of inspection of the Nuclear Power Plant, S-UMAC has been developed by the joint venture CITEC and TECNATOM, a Spanish company, as the control system of the reactor pressure vessel inspection system. In this paper, the general characteristics of S-UMAC has been introduced and analyzed.
Keywords: The Reactor Pressure Vessel Inspection Machine, Control System, S-UMAC
【AE010】Simulator investigation of the ring weld in multi-layered container using ultrasonic phased array technology
Hui Huang, Huandong Huang Jian Liu
Ningbo Special Equipment Inspection Center, Zhejiang Province, 315020
Abstract: As the multi-layered bandaging of urea synthesis tower structure for research object, the deep internal ring weld defect is simulation analyzed for using the ultrasonic phased array technology in this paper. Test results are compared to prove that its superiority and effectiveness than conventional ultrasonic testing technical.
Keywords: multi-layered bandaging ring weld ultrasonic phased array simulation
【AE011】Discuss of in service Urea reactor inspection methods
Hou Shaohua
Shandong AnTai Chemical Pressure Vessel Inspection Center
Abstract: This paper describes the use of inspection methods of inner, outer and latent defects of urea reactors. The effectiveness of different inspection methods are discussed and validated. Results showed that the comprehensive application of acoustic emission evaluation, γ-ray examination and phased array examination can detect urea reactor girth and laminates serious flaws, which may be the best means of detection method for latent defects in multilayer urea rectors.
Keywords: In service urea reactor, Inspection method, Discussion
【AE012】The brief comparison of JB/T4730.3-2005 and JB/T10559-2006 standards
Ji Liming
Jiangsu Province special equipment safety supervision inspection institute Wuxi branch
Abstract: Not only the stress conditions of the Crane are different from the Boiler and Pressure Vessel , but also they both have respective industry and professional characteristics.So the ultrasonic examination standards of them have different focused .This article mainly aims at the difference of ultrasonic examination standards to carry on the brief comparison.
Keywords: Ultrasonic examination JB/T4730.3-2005 JB/T10559-2006 Comparison
【AE013】The best setting for the real-time imaging system
Kiesl Denis, Kong Fanqin
GE Inspection Technology, Asia Technical Support Manager
GE Inspection technology Greater China Application Center, General Manager
Abstract: The traditional film inspection was used on the casting and welding quality control. But the complicated process brought out the time and cost waste. With the development of digital X-Ray technology and high speed imaging detector, the high quality real time inspection is possible and is extended more application field, especially the EN standard was published and then the real-time training system was built.
This topic will mainly focus on how to build a best real-time inspection systems. And the X-Ray tube, image detector, image acquiring software, image processing and geometrical setting will be inferred to get a balance of image quality and time cost.
【AE014】Acoustic Emission Analysis and Pattern Recognition on Hydrogen Induced Cracking of Mild Steel
LI Li-fei 1 ZHANG Wan-ling 1, WANG fang1, SHEN Gong-tian2
1. College of Quality Engineering Supervision, Hebei University, Baoding Hebei, 071002
2. China Special Equipment Inspection Institute, Beijing, 100013
Abstract:The acoustic emission(AE)test method was used and the characteristics of different phases of hydrogen induced cracking (HIC) in 20R mild steel were analyzed. Artificial neural network was used to recognize the pattern of HIC. Practical test showed the above method could test the cracks that common method could not test. The result of pattern recognition was rather accurate, and provides a reference method for practical engineering inspection.
Keywords: Hydrogen induced cracking; Acoustic emission; Mild steel; Pattern recognition
【AE015】Research on the Residual Life Assessment of Ferromagnetic Components
LI Xin-lei, REN Shang-kun, SONG Kai, CHEN Xi , REN Ji-lin
(Nanchang Hangkong University, Key Laboratory of Nondestructive Testing(Ministry of Education), Nanchang,Jiangxi,330063)
Abstract: The fatigue crack growth experiment was carried out at room temperature by the standard SEB(3) specimens of 40Cr steel , the distribution of the surface magnetic field of the specimen under same load and different cycle numbers (N) was investigated. By analyzing relations between the magnetic signals and the crack propagation life, the cumulative fatigue damage, we established a new damage parameter model use magnetic signals. According to this model, we can evaluate the residual life of ferromagnetic components excellently. It is a basic research for the application of magnetic memory testing technology in aspects of early damage and residual life assessment of ferromagnetic materials.
Keywords: non-destructive evaluation;metal magnetic memory;residual life;damage parameter model
【AE016】ASME Ultrasonic Examination Standard for Welded Joints and A Comparison with the Chinese Standard
LI Yan
(NDT Subcommittee of Wuxi Boiler and Pressure Vessel Society, Wuxi 214026, China)
Abstract: Some important specifications of Ultrasonic Examination (UT) for Welded Joints of pressure equipment offered by ASME BPVC Code are outlined, including the quantifying requirements of UT procedures, the type and characteristics of the calibration blocks, the plotting and form of the DAC curves, and the demands on indication characterization and measurement and classification in the acceptance criteria and so on. A comparison is made between the ASME Code and the Chinese Standard JB4730, aimed at providing a reference for the UT standard of pressure vessels linking or harmonizing with international standard.
Keywords: Welded joints; Ultrasonic examination; ASME Code; JB 4730; Method standard; Acceptance criteria
【AE017】Practice and Research on Training Higher-skilled Personnel of Independent Study Method Based on Working Process
LI Ying, YAN RongMing, CHENG Yu
(SHENZHEN POLYTECHNIC, Shenzhen, Guangdong Province, 518055)
Abstract: It is a very important task to train higher-skilled personnel in higher vocational education. In the paper, a try and research on the training of higher-skilled personnel of independent study method based on working process have been presented. It was introduced from three points just as teaching target, teaching methodology and teaching mode. that form a basic thought and method based on course construction.
Keywords: working process, independent study, teaching target, teaching methodology, teaching mode
【AE018】Trial Study for Defect and Nondustrutive Testing of Isotropic Pyrolytic Carbon
LIAN De-liang, WEI Tian-yang, WU Jung-feng, BAI Shuo
(Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China.)
Abstract: Internal defects of isotropic pyrolytic carbon (IPyC) were studied by the polarized light microscopy (PLM) . PLM observations show that the internal defects in the IPyC include three main types of anisotropic inclusions, cracks and isotropic inclusions. Ultrasonic tests show that the pulse-echo technique is a valid method to detect internal defects in the IPyC products.
Keywords: Isotropic pyrolytic carbon; Defect; Nondestructive testing; Ultrasonic testing; Mechanical seal
【AE019】Development of High Precision Multi-function Ultrasonic Testing Device
Lin Junming1, Zhang Zeyi1, Tan Daji2, Huang Sheng3, Zhou Changzhi3
1. Eddysun (Xiamen) Electronic Co. Ltd., Xiamen, 361004
2. Beijing Echo Special Technique of NDT Co. Ltd., Beijing, 100192
3. Beijing University of Aeronautics and Astronautics, Beijing, 100191
Abstract: Ultrasonic testing is one of the most widely used non-destructive technologies. A high precision multi-function ultrasonic testing device is developed and the design methods of hardware and software of the device are explained. The practical testing results show that the device has an excellent performance and it is a sophisticated high precision multi-function ultrasonic flaw and thickness meter.
Keywords: non-destructive testing; ultrasonic flaw detector; ultrasonic thickness meter; system design
【AE020】The Integrated Eddy Current Testing and Magnetic Memory Method Testing for Ferromagnetic Metals
Lin Junming, Li Hanlin
Eddysun (Xiamen) Electronic Co. Ltd., Xiamen, 361004
Abstract: By a special integrated eddy current and magnetic memory probe, a new technique integrated the advantages of eddy current testing and magnetic memory method has been developed and presented in this article. An experiment has been carried out on a steel specimen during a tensile test. The result shows that, the integrated eddy current testing and magnetic memory method technique can evaluate all the four stages of the specimen: normal, stress-strained, damaged, damaged and stress-strained. So, this new technique can be introduced for the health monitoring of remanufacturing industry and provides more helpful information than the single one.
Keywords: Magnetic memory method, eddy current testing, Ferromagnetic metals, Integrated NDT technique
【AE021】An electromagnetic system of pulsed eddy current for the corrosion inspection of tube walls with thermal insulation layers
Lin Junming, Lin Fabing, Lin Chunjing
Eddysun (Xiamen) Electronic Co. Ltd., Xiamen, 361004
Abstract: The pulsed eddy current method has been introduced for the corrosion inspection and metal loss of pipe walls with thermal insulation layers or anticorrosion coating. The corresponding basic principles, experiment results and developments are presented. An electromagnetic system of pulsed eddy current for the corrosion inspection of tube walls with thermal insulation layers has been developed. This system can be applied for the in service thickness determination of pipe walls with about 100 mm thermal insulation layers
Keywords: electromagnetic testing, thermal insulation layers, pulsed eddy current, corrosion
【AE022】Application of the Integrated NDT Technique on Network in Nuclear Power Equipment Inspections
Lin Junming, Lin Fabing, Lin Chunjing, Zhang Kailiang, Yu Xingzeng, Li Hanlin
Eddysun (Xiamen) Electronic Co. Ltd., Xiamen, 361004
Abstract: With the development of the nuclear power industry, the requirements of the NDT techniques are getting more and more restrict for the production safety and the quality controls. In this paper, we presents a new integrated NDT technique based on the computer network for the remote control and the integration of many kinds of NDT equipments including eddy current, magnetic flux leakage, magnetic memory and ultrasonic. Meantime, EEC-2008net, a integrated electromagnetic (eddy current) / ultrasonic system on computer network, have been developed and introduced for the in service inspections of titanium condenser tubes in the Daya Bay Nuclear Power Station.
Keywords: Network, Eddy current, Ultrasonic, Nondestructive testing
【AE023】Development of Multi-Channel Ultrasonic Testing Device
Lin Junming1, Tan Daji1, Zhang Zeyi2, Huang Sheng3, Zhou Changzhi3
1. Eddysun (Xiamen) Electronic Co. Ltd., Xiamen, 361004
2. Beijing Echo Special Technique of NDT Co. Ltd., Beijing, 100192
3. Beihang University, Beijing, 100191
Abstract: For the improvement of the testing efficiency, real-time testing ability, testing stability, a multi-channel ultrasonic testing device has been developed with the modern ultrasonic testing technique, computer and electrical sciences, modern single processing methods. The design methods on both hardware and software of this device have also been presented. The practical testing results showed that the device has high agreements in each channel, superior performances in the emission and receiving system, higher repeat frequency up to 10kHz in the 4-channel mode. The design with FPGA could satisfy various kinds of the field inspection requirements.
Keywords: nondestructive testing; ultrasonic; multi-channel; instrument design
【AE024】Application and Development of Risk based inspection (RBI) Technology in China
Liu Fujun, Kong Shuai, Hu Dongming, Guo Xiaolian
(Zhejiang provincial Special Equipment Inspection and Research Institute, Zhejiang Province, Hangzhou, 310020)
Abstract: Risk based inspection (RBI) technology is an optimized strategy of inspection established on the pursuit of the unification of safety and economy of the special equipment. Gradually since 2003, RBI technology has been carried out and promoted in China. In this paper, the application of RBI technology in China was introduced, the principle of RBI technology and its implementation in petrochemical, electric power, shipbuilding industry and offshore oil platform system was presented, and its localization problems especially the RBI software problems and the support by national laws and regulations were discussed in detail. Meanwhile, it was indicated that there are many fields in which RBI technology has not applied as well as it has a good prospect in China.
Keywords: special equipment; RBI technology; inspection; localization
【AE025】Introduce examination machine and inspection technology for Reactor vessel
Ming Li, Hendry Chen, ZhongYuan Lin, WeiKe Xu, MaoCheng Hong, HongBin Shan
CGNPC Inspection Technology Company, SuZhou, 215004
Abstract: Follow detail Ultrasonic inspection requirement of ASME and RSEM code, Reactor Pressure Vessel need to performance full scope examination for different position during PSI and ISI period. At the same time, consider RPV component have high radiation, Therefore, RPV inspection machined usually was composed of different function parts, etc: mechanical and control part, Ultrasonic data acquisition and evaluation software. In the first, this article introduce how to choose and define some basic ultrasonic parameters, for example: choose probe frequency .define probe angle and for different depth use different focus probe to cover full sound path between 6dB focus length. Finally, preset a simple brief about typical function of ultrasonic data acquisition SW (MIDAS) and evaluation SW(MASERA).
Keywords: Reactor Vessel, In-service inspection, Ultrasonic inspection
【AE026】Research on Effect of Lift-Off to Thickness Inspection by Pulsed Eddy Current
Shi Kun, Lin Shuqing, He Defeng, Fan Zhiyong, Li Hao, Wu Xin
(1. China Special Equipment Inspection and Research Institute, Beijing, 100013
2. Beijing Jiaotong University, Beijing, 10044)
Abstract: Commonly conventional techniques are helpless to measure wall thickness of equipment in line. However, with the advantage of wide frequency spectrum, strong penetration and longer attenuation, pulsed eddy current is very adaptable to measure wall thickness of metal in high or low temperature without insulation removal. The high-tech of PEC is becoming research focus of the world. As the practical insulation thickness different, so the lift-off between metal and probe is different. Researchers made many trials in order to know how lift-off influences measuring. Finally they found the relationship between lift-off and error, made quantitative analysis, established the formula of correcting data of inspection.
Keywords: Pulsed Eddy Current Lift-off Discrepancy
【AE027】Experimental study on Ultrasonic Guided Wave Inspection of Pipes Using the Magnetostrictive Sensor Technology
SONG Jin-gang 1, CHEN Ke 1, LI Hong-le 1, Lei Min 1, LIU Zeng-hua 2
1. Beijing Special Equipment Inspection & Testing Center, 2. Beijing University of Technology
Abstract: The ability of ultrasonic guided wave inspection of pipes using the magnetostrictive sensor technology is studied experimentally. In the experiments, T(0,1) mode is excited and used for pipe inspection while the sensors are air-coupled to the pipes. The experimental results obtained in a 9.6-meter long pipe sample show that the echo signal still has high SNR after the T(0,1) mode guided wave propagating about 153.6 meters. T(0,1) mode at 64kHz is used in in-situ tests for two stream pipes, and the received signals show that the typical structures such as the welds, stents, elbows of the pipes can be well detected. The inspection range is about 13 meters and the location error is less than 150mm.
Keywords: magnetostrictive effect; ultrasonic guided waves; pipe; dry-coupling; defect detection
【AE028】The research of extracting information of the ESPI fringes based on mathematics morphology
Sun Yanguo1, Wang Haitao1, Jiang Zhaofang1, Tian Guiyun1,2, Zhu Yongkai1
School of automation engineering, Nanjing University of Aeronautics and Astronomy, Nanjing, 210016, China
Newcastle University upon Tyne, UK
Abstract: After the processing by filtering and binarization of Eectronic Speckle Pattern Interferometry (ESPI) fringe image, it needs to extract and analyze the interference fringes information. It analyzes some ways of the stripes skeleton extraction based on mathematics morphologhy, such as thinning algorithm based on the hit-miss transform, improved mathematics morphologhy thinning and mathematical morphology skeleton extraction method. We can get the best results by improved mathematics morphologhy thinning.
Keywords: mathematics morphologhy thinning skeleton extraction
【AE029】The research on the ferromagnetic material defects with the time slices method
Sun Yinchun1, Wang Ping1, Tian Guiyun1,2, Wang Haitao1
School of automation engineering, Nanjing University of Aeronautics and Astronomy, Nanjing, 210016, China
Newcastle University upon Tyne, UK
Abstract: This article applies the technique to test the ferromagnetic material defects by use the analytical method of time slices. With the pulse exciting on the U-form magnetic yoke, the sensor array is settled by the two sides of magnetic yoke in linear distribution in order to test the changing of the magnetic field distributing caused by corrosion. Analysis of different depths corrosion accords to the correspondent relationship between response curve of rising time and the testing depth. The standard corrosion types in the test include square slot corrosion, skewed slot corrosion. According to the results of time slices to judge the status of the corrosion, which suggests this testing technique has certain recognition capability to identify various corrosion types compared to peak value testing.
Keywords: Analytical method of time slices; Pulsed eddy current;Linear sensor array ;
【AE030】Numerical Simulation on Damage Identification using Vibration Signals for Lattice Truss Sandwich Plate
TIAN Shuxia, CHEN Zhenmao
(MOE Key Laboratory for Strength and Vibration, Xian Jiaotong University, Xian, 710049, China)
Abstract: In this paper, a numerical study for vibration based lattice truss structural damage identification is presented. First, the validity of the numerical model is verified by comparing the calculated results with those of other researchers. Then, based on this model, vibration behaviors are simulated for delamination damages of different locations and different damage degree, and the relationship between delamination damage and natural frequencies and modal shapes is analyzed. The research results lay a foundation for the further study of the delamination damage inspection of lattice truss sandwich plate.
Keywords: Lattice truss sandwich plate, Delamination damage, Natural frequencies, Modal shapes
【AE031】The application of UT simulation technique in the ultrasonic testing of reactor pressure vessel
Tianming Lv, Ming Lee, Huaidong Chen, Hongbin Shan
(CGNPC inspection technology limited company, Suzhou, 215004)
Abstract: Compared with experiment investigation, UT simulation technique can improve the comprehension of basic principle of the ultrasonic wave generation and imaging. It is more economy. When the mathematic module established, it is convenience to do the investigation by change the different parameters used to design or optimize ultrasonic inspection technique. This paper describe the application of UT simulation technique in the ultrasonic testing of reactor pressure vessel (as an example, flange to shell weld), in order to illustrate the process of simulation on ultrasonic inspection and the results of simulation.
Keywords: nuclear power plant, reactor pressure vessel, ultrasonic inspection, ultrasonic simulation
re the residual stress distribution in welded structures by laser induced SAWs.
【AE032】The Research on the features of the propagating waves control of the ultrasonic phased array
Wang Haitao 1, Cheng Jilong 1, Cai Jiahui1, Tian Guiyun1,2
School of automation engineering, Nanjing University of Aeronautics and Astronomy, Nanjing, 210016, China
Newcastle University upon Tyne, UK
Abstract: one of fundamental features of Ultrasonic Phased Arrays (UPA) is the ability to focus and steer the propagating waves to a specific point within the load material by control a parabolic time delay of each element. Recently, the ultrasonic phased array technique has been demonstrated as an attractive method to NDT, making it successful in many industry and medical application. A phased array is a multi-element piezoelectric device, the elements of which are individually excited by electric pulses at programmed delay times. A numerical simulation model is established to investigate the influences of parameters of linear phased array transducers on beam steering based on the principle of ultrasonic phased array which will be basic results for UPA.
Keywords: Ultrasonic phased array, beam of the waves, transducer, research on the features
【AE033】Feature Extraction of Welding Defects Based on Metal Magnetic Memory
WANG Jin, REN Ji-lin, REN Shang-kun, LUO Sheng-cai, YANG Sheng
(Key Lab of Nondestructive Testing, Ministry of Education, Nanchang Hangkong University, Nanchang 330063, China)
Abstract: Metal Magnetic Memory Testing(MMMT) is already used in both defect inspection of fenomagnatic structure and the stress concentration zone detecting inside the structure through inspection of magnetic leakage field in the geomagnetic field. The application of MMM in weld inspection is investigated. Through experiments, MMM signal of two samples in no stress and imposed load is gathered respectively, and carry on comparative analysis. The feasibility of wavelet packet energy spectrum used in magnetic memory testing of weld defects is analyzed. On the theoretical basis of wavelet packet transform, MMM signal is processed by wavelet packet decomposition and wavelet energy spectrum analysis. The feasibility of by the position of energy concentration to judge the area of defect is proved.
Keywords:Metal magnetic memory;Welding defects;Wavelet packet;Energy spectrum
【AE034】304 stainless steel crystal ultrasonic scatter
Wu Wei, Jin Xinhong,Zhang Yanyan
Abstract: The ultrasonic scatter of 304 stainless steel which have different difference crystal size was studied in this paper, It was showed that the biger crystal size will cause higher ultrasonic scatter. This result can be used in real ultrasonic inspection.
Keywords: ultrasonic Testing, crystal size, ultrasonic scatter
【AE035】The foundation to ensure the accurate of testing data and assure the reliable of testing results for the special equipment inspection institute
Xie Changhuan 1, Du Nansheng 2
1. Shenzhen Institute of Special Equipment Inspection and Test , GuangDong
2. Guangzhou Special Pressure Equipment Inspection & Research Institute , GuangDong
Abstract: The foundation to ensure the accurate of testing data and assure the reliable of testing results for the special equipment inspection institute are the traceability of testing instruments and equipments, this article give the way to meet the traceability of testing instruments and equipments effectually.
Keywords: testing instruments and equipments traceability
【AE036】An Introduction to Mechanical Device of Reactor Vessel Inspection Manipulator(TIME)
Weike Xu, Ming Li, Huaidong Chen, Xuezhu Xiao, Maocheng Hong
(CGNPC Inspection Technology CO.,LTD. ,Suzhou ,215004)
Abstract: TIME is introduced from Spain by CGNPC Inspection Technology CO.,LTD. used as a manipulator for reactor vessel inspection, the main function of TIME is to do automatic ultrasonic and visual inspection for RPV. This paper introduces an overall mechanical structure of TIME, and describes the main function of each movement according to the scopes and requirements of RSE-M.
Keywords: Reactor Vessel, ISI, UT, VT
【AE037】Simulation and Experimention Research on Pulsed Magnetic Flux Leakage Sensor Used to detect Corrosion in Insulated Pipeline
YANG Binfeng, YU Fuping, WANG Yunjiang
(Institute of Telecommunication Engineering, Air Force Engineering University,Xi’an 710077)
Abstract: It is difficult to detect corrosion in insulated pipeline in nondestructive testing (NDT), Pulsed magnetic flux leakage (PMFL) technique is used to detect corrosion. The detection ability of four sensor models are studied with finite element method, finally, the performance of sensor with the core in both sides are investigated by experiment, result shows that this sensor can be used to quantify the depth of corrosion.
Keywords: Insulated pipeline, Corrosion, Pulsed magnetic flux leakage, Sensor
【AE038】Nondestructive Test for Fillet Welds in Nozzle Stubs of Medium-pressure Boiler in Power Plant
Jiangsu Province Special Equipment Safety Supervision Inspection Institute, Wuxi Branch
Abstract: In the inspection on power plant boilers, the effective test for the fillet welds is of great importance. In this paper, aiming at the nondestructive test for the fillet welds in nozzle stubs of medium-pressure boilers in power plant, proper inspection samples and inspection methods are selected, which are more systematic, more general, and more orientated. Through experimental research and on-site validation, this methodology would be helpful for the improvements of inspection quality.
Keywords: Fillet weld, penetrant testing, magnetic particle testing, ultrasonic testing, radiographic testing
【AE039】The Actual Testing & Calculation Method of the Change Rules of Echo Amplitude for the V-Shaped Groove
YAO Li 1, SONG De-chao 2, ZHU Hong-qi 3
1. China Airedynamic Research and Development Center, Mianyang, Sichuan
2. Xinya Nondestructive Testing Co. Ltd, Chengdu, Sichuan
3, Special Equipment Inspection Institute of Sichuan Province, Chengdu, Sichuan
Abstract: Aim at Ultrasonic Test by transverse wave slanting explorer, this paper analyzed the change rules of the echo amplitude with the distance variety between the different size of V-shaped groove. The simple calculates and the practice testing are carry out. The result with some actual engineering content was arrived at.
Keywords: Ultrasonic Test; V-Shaped Groove; DAC Curves; Calculation Method; Testing
【AE040】The automatic analysis technology of eddy current data for steam generator tubes
Yayao Bei, Xiaoguang Li, Tao Song, Lin Ge
(CGNPC Inspection Technology Company, Ltd., Suzhou, Jiangsu 215004)
Abstract: Steam generator tubes will suffer degradation due to chemical and mechanical mechanism during the operation period, which must be tracked using eddy current testing technology. However, it becomes the major work and one of the main difficulties for carrying out accurate and quick analysis for large amount of eddy current data of steam generator tubes. This paper introduced the method for executing automatic data analysis for steam generator tubes using Teddy ET acquisition and analysis software which imported from Spanish (Tecnatom Company) and gave an example of practical application.
Keywords: Steam generator (SG); Eddy current; Automatic analysis; SLG
【AE041】Straight Wave UT Technical for Dissimilar Weld of Tube to Safe-End in Reactor Pressure Vessel
YIN Qin LAI Chuan-Li CHEN Tai-Jun
(Dongfang Boiler Company ltd., Zigong Sichuan 643001, China)
Abstract: Tube to Safe-End joint in Reactor Pressure Vessel (RPV) belongs to Austenite-Ferrite type Dissimilar Weld. It is difficult to perform UT because of its coarse grain structure. Consider of deficient detectability of planar defect by angle longitudinal wave technical, a straight longitudinal wave technical which takes Safe-end as scanning surface is put forward based on Joint structure. Experiment and research indicate it has good detectability of planar defect which is vertical to the weld surface. This technical may be applied in manufacture stage of RPV Combining with angle longitudinal wave technical.
Keywords: RPV; Dissimilar Steel Weld; UT; Austenite
【AE042】Electromagnetic Inspection of Pipes without Removal of Protection Layers
Yuwu Yu (R&D) and Vincent Shen (Manager of Technical Support)
Russell N.D.E. Systems Inc.
Abstract: A new electromagnetic NDE inspection technique is introduced for pipes with protection and/or insulation layer. In-service pipes can be inspected without being disrupted. There is no need for removal of protection/insulation layers. The inspection is done from pipe exterior. The technique is sensitive to local and general wall loss. Case study data will be presented and discussed in the paper.
【AE043】Effect of ultrasonic excitation source on thermosonic image of cracks
ZHENG Jiang1, ZHENG Kai2, ZHANG Shu-yi1
1 Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University,
Nanjing 210093, People’s Republic of China
2 Jiangsu Province Special Equipment Safety Supervision Inspection Institute,
Nanjing 210003, People’s Republic of China
Abstract: Thermosonic imaging is a new kind method of NDE/T technology for detecting surface and subsurface cracks and defects. In the technology, the cracks (defects) will be heating under intensive ultrasonic pulses excitations due to both sides of the cracks have different vibration amplitudes and phases. In the experimental studies of the technology, it has been found that the cracks display obviously different temperatures (heat) while the ultrasonic excitation sources are located at different positions. On the other hand, based on the ultrasonic vibrations in plates a theoretical model is presented to calculate the vibrations of both sides of the cracks, and the amplitude and phase differences between the vibrations of both sides of the cracks are obtained, in which the harmonic components are considered. The results show that the differences are dependent on the relative directions and distances between the ultrasonic sources and the cracks. The amplitude and phase differences of both sides of the cracks determine the temperatures (heats) around the cracks. Finally, the results are analyzed and discussed, which show that the theoretical calculations are in agreement with that of the experimental measurements.
【AE044】Surface Fatigue Crack Detection of in Service Rotary Shaft by Creeping Wave
ZHOU Chang-Zhi1, LIN Jun-Ming2, ZHOU Zheng-Gan1
(1. Beijing University of Aeronautics and Astronautics, Beijing, 100191;
2. Beijing Echo Special Technique of NDT Company, Beijing, 100192)
Abstract: Conventional ultrasonic NDT method is quite incompetence for the surface fatigue crack testing of in service rotary shaft. Considering the formation mechanism of the surface fatigue crack in rotary shaft and the propagation character of creeping wave in media, creeping wave is employed to the surface fatigue crack detection of in service rotary shaft. An experiment was carried out on a certain type of stepped rotary shaft for the testing of surface fatigue cracks. The result reveals that, this method is simple and efficient for the fatigue crack testing of in service rotary shaft, and it can be applied for the routine testing of in service rotary shaft.
Keywords: Creeping wave; Surface fatigue cracks; Ultrasonic nondestructive testing, Rotary shaft testing
【AE045】Application of weighted Mean Filtering and Laplacian of Gaussian in Infrared Image Edge Detection
ZHOU Heng, ZHU Yong-kai, WANG Haitao
(College of Automation, Nanjing University of Aeronaytics and Astronautics, Nanjing, 210016)
Abstract: Edge is the most basic features of image. In the field of industrial detection, accuracy edge detection for infrared image can effective discovery the shape and the size of defects. In this paper, a weighted average to determine filter first, second Images median filtering, mean filtering and weighted mean filtering, and then detect the infrared image edge separately on Pre-filtering, after median filtering, mean filtering and weighted mean filtering by Canny and LoG operator. Results show that edge detection, edge detection for after weighted mean filtering by LoG operator can keep more edge information, fewer false edge and more accurate test results relatively.
Keywords: Infrared image; weighted mean filtering; LoG operator; Edge Detection
【AE046】Ultrasonic testing valves and pins of seawater pipeline in
Zhu Simin
CANDU Nuclear Plant, (State Nuclear Power Plant Operation Service Technology Company, shanghai 200233 )
Abstract: The thesis depicts Ultrasonic testing of valves and pins what work in the seawater pipeline of CANDU Nuclear Plant. According to Ultrasonic mechanism, the method of UT was experimented. The paper estimates the wearing situation of electric isolation valve in condenser by combining small-angle longitudinal-wave probe and 0º longitudinal-wave probe, expounds experimentation and process of testing, analyses and evaluates the situation of valves and pins of the seawater pipeline.
Keywords: Ultrasonic testing, CANDU Nuclear Plant, valves and pins, Small-angle longitudinal-wave probe
【AE047】Ultrasonic Immersion Inspection of the Thin-Wall Pressurized Tubes in Heavy Water Nuclear Power Plant
Zhu Simin, Bi Bingrong
(Nucler Nondestructive Testing Centre, Shanghai 200233, China)
Abstract: Scratches occurred on the inner surface of Pressure Tubes in Third Qinshan Nuclear Power (CANDU-6) Plant were described. Considering the nature of the scratches ultrasonic inspection technique was established. Water-immerging inspection method was used to evaluate the depth of the scratches. Water-immersion testing method and its procedure were described. Analysis and evaluation were carried out for the pressure tubes scratched according to the results of inspection.
Keywords: Ultrasonic inspection; Nuclear power plant; Water-immersion method; Thin-wall Pressure tube
【AE048】Enhancement of ECT Sizing Capability for Deep Cracks using Multi-Exciting Coils
ZUO Yongbin, CHEN Zhenmao
MOE Key Laboratory for Strength and Vibration, School of Aerospace, Xi'an Jiaotong University, Xi'an 710049, China
Abstract: In order to enhance sizing capability for a deep crack, a modified multiple exciting coil ECT inspection scheme is proposed and studied in this paper. The key idea is that, not only the amplitude, but also the phase of the excitation current in the two pairs (four) of exciting coils are adjusted to suppress the eddy currents on the surface of the inspection target. The numerical results reveal that the modified way gives some improvement of sizing capability for deep cracks.
Keywords: Multi-Exciting Coils; Deep Cracks; ECT; Numerical Simulation