大型容器不锈钢衬厚度多频涡流无损评价方法
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摘要
提出了一种基于多频涡流检测技术的大型容器不锈钢衬的厚度无损评价方法,并开发了相应的实验系统,利用检测实验进行了有效性验证。所提方法基于多频涡流检测技术原理,利用互感型涡流检测探头,基于新的信号特征量采用标定曲线方法实现了钢衬厚度的有效定量无损评价。具体过程为:利用已知厚度的钢衬标定试样,在给定激励频率情况下,基于所提多频涡流信号特征量建立了钢衬厚度-信号特征量标定关系曲线;对实际检测对象待测点利用相同实验条件获取了多频涡流检测信号并提取特征量;基于标定曲线和检测信号特征量求取了钢衬厚度值。检测评价实验表明,本方法可对1.0mm～4.0mm以内的大型容器钢衬厚度进行有效评价。
In this paper a new NDE method to evaluate the thickness of cladding layer in large carbon steel vessel is proposed by using the eddy current testing(ECT) technique. To realize the thickness evaluation, a calibration curve strategy is utilized with a transmitter-receiver type ECT probe and a new feature parameter of multi-frequency ECT signals. In practice, the correlation curve of cladding layer thickness versus signal feature parameter is established experimentally at first by using a multi-frequency ECT system and vessel wall samples with cladding layer of different thickness. Then the multi-frequency signals at the evaluation point are measured under the same inspection conditions with the calibration experiments, and the feature parameter is extracted from the measured signal set the same time. Finally, the thickness of stainless cladding layer at the measuring point can be evaluated with the value of feature parameter based on the obtained calibration curve. Experimental results indicate that the proposed method performs efficiently for quantitative evaluation of thickness of stainless steel cladding layer with its thickness ranging from 1.0 mm to 4.0 mm.
In this paper a new NDE method to evaluate the thickness of cladding layer in large carbon steel vessel is proposed by using the eddy current testing(ECT) technique. To realize the thickness evaluation, a calibration curve strategy is utilized with a transmitter-receiver type ECT probe and a new feature parameter of multi-frequency ECT signals. In practice, the correlation curve of cladding layer thickness versus signal feature parameter is established experimentally at first by using a multi-frequency ECT system and vessel wall samples with cladding layer of different thickness. Then the multi-frequency signals at the evaluation point are measured under the same inspection conditions with the calibration experiments, and the feature parameter is extracted from the measured signal set the same time. Finally, the thickness of stainless cladding layer at the measuring point can be evaluated with the value of feature parameter based on the obtained calibration curve. Experimental results indicate that the proposed method performs efficiently for quantitative evaluation of thickness of stainless steel cladding layer with its thickness ranging from 1.0 mm to 4.0 mm.
引文
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[12]WANG L,CHEN Z M.Reconstruction of stress corrosion cracks using high-dimension hybrid optimization algorithm from eddy current signals[J].International journal of applied electromagnetics&mechanics,2016,52(3):1-7.
[13]YANG B,LI X.Pulsed remote field technique used for nondestructive inspection of ferromagnetic tube[J].NDT&E international,2013,53:47-52.
[14]CAI W L,XIE Z,XIE S J,et al.Influence of the online closure loading on the eddy current testing signals of closed fatigue crack[J].International journal of applied electromagnetics&mechanics,2016,52(1/2):297-306.
[15]EGOROV A V,KUCHERYAVSKIY S V,POLYAKOV V V.Resolution of effects in multi-frequency eddy current data for reliable diagnostics of conductive materials[J].Chemometrics and intelligent laboratory systems,2017,160:8-12.
[16]MAO X F,LEI Y Z.Thickness measurement of metal pipe using swept-frequency eddy current testing[J].NDT&E international,2016,78:10-19.
[17]CHOUA Y,SANTANDREA L,LE Bihan Y,et al.Mesh refinement in eddy current testing with separated T-R probes[J].IEEEtransactions on magnetics,2010,46(8):2795-2798.
[18]LI W,YE Y,ZHANG K,et al.A Thickness measurement system for metal films based on eddy-current method with phase detection[J].IEEE transactions on industrial electronics,2017,64(5):3940-3949.
[19]FAN M B,CAO B H,SUNNY A I,et al.Pulsed eddy current thickness measurement using phase features immune to lift off effect[J].NDT&E international,2017,86:123-131.
[20]JOMDECHA C,CAI W L,XIE S J,et al.A numerical study on eddy current signal characteristics of imitative stress corrosion cracks[J].International journal of applied electromagnetics&mechanics,2017,55(4):1-13.
[21]JANOUSEK L,CHEN Z M,YUSA N,et al.Excitation with phase shifted fields-enhancing evaluation of deep cracks in eddy-current testing[J].NDT&E international,2005,38(6):508-515.
[2]李春旺,武晓亮,柴桥,等.航空发动机压气机叶片振动疲劳裂纹扩展规律研究[J].应用力学学报,2016,33(3):384-388.(LIChunwang,WU Xiaoliang,CHAI Qiao,et al.Vibration fatigue crack propagation law of aero-engine compressor blade[J].Chinese journal of applied mechanics,2016,33(3):384-388(in Chinese)).
[3]XUE G H,CAO M,SHEN R,et al.Performance research on domestic o-ring of reactor pressure vessel[J].Pressure vessel technology,2016,33(3):16-20.
[4]杨宾峰,胥俊敏,王晓锋,等.飞机铆接结构缺陷的远场涡流检测技术研究[J].传感技术学报,2017,30(10):1493-1496.(YANGBinfeng,XU Junmin,WANG Xiaofeng,et al.Research on remote field eddy current technique applied to inspect riveted structure[J].Chinese journal of sensors and actuators,2017,30(10):1493-1496(in Chinese)).
[5]朱光艺,吴磊,解社娟,等.塑性变形及疲劳损伤对304奥氏体不锈钢电磁特性的影响研究[J].应用力学学报,2017,34(5):842-847.(ZHU Guangyi,WU Lei,XIE Shejuan,et al.Influences of plastic deformation and fatigue damage on electromagnetic characteristics of 304 austenitic stainless steel[J].Chinese journal of applied mechanics,2017,34(5):842-847(in Chinese)).
[6]李一力,李勇,刘相彪,等.电磁超声换能器中电磁场及洛伦兹力的快速求解方法[J].应用力学学报,2015,32(3):390-395.(LIYili,LI Yong,LIU Xiangbiao,et al.Fast computation algorithm for electromagnetic field and Lorentz force of electromagnetic acoustic transducers[J].Chinese journal of applied mechanics,2015,32(3):390-395(in Chinese)).
[7]李鹏,陈雨,姜敏.金属背衬参数对埋入式压电陶瓷声压特性的影响[J].应用力学学报,2017,34(3):438-444.(LI Peng,CHENYu,JIANG Min.Influence of metal backing parameters on acoustic-pressure characteristics of the piezoelectric ceramic embedded in concretes[J].Chinese journal of applied mechanics,2017,34(3):438-444(in Chinese)).
[8]姜敏,陈雨,邓洪敏,等.基于路径映射的埋入混凝土中PZT声能特性分析[J].应用力学学报,2016,33(6):989-995.(JIANG Min,CHEN Yu,DENG Hongmin,et al.Acoustic energy characteristics analysis of PZT embedded in concrete based on mapping results onto a path[J].Chinese journal of applied mechanics,2016,33(6):989-995(in Chinese)).
[9]YANG B,ZHANG H,ZHANG C,et al.Pulsed remote field eddy current technique applied to non-magnetic flat conductive plates[J].Nondestructive testing&evaluation,2013,28(4):354-366.
[10]XIE S J,FANG B P,CAI W L,et al.Sizing of defects in special shaped coolant pipe of tokamak magnet based on eddy current testing signals[J].International journal of applied electromagnetics&mechanics,2016,52(1/2):307-314.
[11]胥俊敏,杨宾峰,王晓锋,等.铆接结构缺陷检测中远场涡流传感器的优化设计[J].机械工程学报,2017,53(14):120-127.(XUJunmin,YANG Binfeng,WANG Xiaofeng,et al.Research on magnetic field suppression technique in detecting pulsed remote filed eddy current[J].Journal of mechanical engineering,2017,53(14):120-127(in Chinese)).
[12]WANG L,CHEN Z M.Reconstruction of stress corrosion cracks using high-dimension hybrid optimization algorithm from eddy current signals[J].International journal of applied electromagnetics&mechanics,2016,52(3):1-7.
[13]YANG B,LI X.Pulsed remote field technique used for nondestructive inspection of ferromagnetic tube[J].NDT&E international,2013,53:47-52.
[14]CAI W L,XIE Z,XIE S J,et al.Influence of the online closure loading on the eddy current testing signals of closed fatigue crack[J].International journal of applied electromagnetics&mechanics,2016,52(1/2):297-306.
[15]EGOROV A V,KUCHERYAVSKIY S V,POLYAKOV V V.Resolution of effects in multi-frequency eddy current data for reliable diagnostics of conductive materials[J].Chemometrics and intelligent laboratory systems,2017,160:8-12.
[16]MAO X F,LEI Y Z.Thickness measurement of metal pipe using swept-frequency eddy current testing[J].NDT&E international,2016,78:10-19.
[17]CHOUA Y,SANTANDREA L,LE Bihan Y,et al.Mesh refinement in eddy current testing with separated T-R probes[J].IEEEtransactions on magnetics,2010,46(8):2795-2798.
[18]LI W,YE Y,ZHANG K,et al.A Thickness measurement system for metal films based on eddy-current method with phase detection[J].IEEE transactions on industrial electronics,2017,64(5):3940-3949.
[19]FAN M B,CAO B H,SUNNY A I,et al.Pulsed eddy current thickness measurement using phase features immune to lift off effect[J].NDT&E international,2017,86:123-131.
[20]JOMDECHA C,CAI W L,XIE S J,et al.A numerical study on eddy current signal characteristics of imitative stress corrosion cracks[J].International journal of applied electromagnetics&mechanics,2017,55(4):1-13.
[21]JANOUSEK L,CHEN Z M,YUSA N,et al.Excitation with phase shifted fields-enhancing evaluation of deep cracks in eddy-current testing[J].NDT&E international,2005,38(6):508-515.