用于钢绞线的磁弹应力和磁致伸缩导波同步检测技术
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摘要
为在钢绞线中实现磁弹应力和超声导波的同步检测,提出了一种高、低频叠加的励磁方法,并基于2种具有宽频带特性的功率放大器,构建了专用实验装置.基于KH7500功放的实验装置中,一体化传感器检测线圈输出电压的高频成分即为磁致伸缩纵向模态超声导波信号,低频成分携带了局部磁滞回线信息;当实验装置采用BMP-360T功放时,传感器采用2个独立的感应线圈,可分别检测局部磁滞回线和超声导波信号. 2套实验装置获得的检测结果均表明:低频感应电压峰值与应力间存在良好线性关系,真正实现了钢绞线中超声导波、磁弹应力的同步检测.
A magnetization method using superimposed high-and low-frequency magnetic field was proposed to simultaneously achieve elasto-magnetic tensile stress measurement and ultrasonic guided waves inspection in steel strands. Two versions of experimental set-ups were constructed based on two types of amplifiers. In the experimental set-up using KH7500 amplifier,the high frequency component of the output signal of the integrated sensor represented magnetostrictive-based ultrasonic guided waves,and the low frequency component carried the information of minor hysteresis loop. In the experimental set-up using BMP-360 T amplifier,the sensor employed two individual sensing coils to detect the signals of minor hysteresis loop and ultrasonic guided waves,respectively. The experimental results obtained from the two versions of experimental set-ups show that there is a good linear relationship between the peak value of the low frequency induced voltage and the tensile stress. The research outcomes provide technique for simultaneously conducting elasto-magnetic tensile stress measurement and ultrasonic guided waves inspection in steel strands.
A magnetization method using superimposed high-and low-frequency magnetic field was proposed to simultaneously achieve elasto-magnetic tensile stress measurement and ultrasonic guided waves inspection in steel strands. Two versions of experimental set-ups were constructed based on two types of amplifiers. In the experimental set-up using KH7500 amplifier,the high frequency component of the output signal of the integrated sensor represented magnetostrictive-based ultrasonic guided waves,and the low frequency component carried the information of minor hysteresis loop. In the experimental set-up using BMP-360 T amplifier,the sensor employed two individual sensing coils to detect the signals of minor hysteresis loop and ultrasonic guided waves,respectively. The experimental results obtained from the two versions of experimental set-ups show that there is a good linear relationship between the peak value of the low frequency induced voltage and the tensile stress. The research outcomes provide technique for simultaneously conducting elasto-magnetic tensile stress measurement and ultrasonic guided waves inspection in steel strands.
引文
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[22]王悦民,康宜华,武新军.磁致伸缩效应在圆管中激励纵向导波的理论和试验研究[J].机械工程学报,2005,41(10):174-179.WANG Y M,KANG Y H,WU X J.Theoretical and experimental study on generation of longitudinal guided waves in circular pipes based on magnetostrictive effect[J].Chinese Journal of Mechanical Engineering,2005,41(10):174-179.(in Chinese)
[2]余道华,李扬.基于磁通量法的钢索拉力测量实验研究[J].电子质量,2008(11):25-27.YU D H,LI Y.Electromagnetism method of stress measurement in steel[J].Electronics Quality,2008(11):25-27.(in Chinese)
[3]XU F Y,WANG X S,WU H T.Inspection method of cable-stayed bridge using magnetic flux leakage detection:principle,sensor design,and signal processing[J].Journal of Mechanical Science and Technology,2012,26(3):661-669.
[4]LIU Z,ZHAO J,WU B,et al.Configuration optimization of magnetostrictive transducers for longitudinal guided wave inspection in seven-wire steel strands[J].NDT&EInternational,2010,43(6):484-492.
[5]KIM J T.Field application of elasto-magnetic stress sensors for monitoring of cable tension force in cable-stayed bridges[J].Smart Structures&Systems,2013,12(12):465-482.
[6]XIE S,TIAN M,PAN X,et al.A hybrid nondestructive testing method of pulsed eddy current testing and electromagnetic acoustic transducer techniques for simultaneous surface and volumetric defects inspection[J].NDT&E International,2017,86:153-163.
[7]WANG M L,WANG G,ZHAO Y.Application of EMstress sensors in large steel cables[J].Smart Structures and Systems,2005,2(2):395-406.
[8]SCHAAL C,BISCHOFF S,GAUL L.Energy-based models for guided ultrasonic wave propagation in multi-wire cables[J].International Journal of Solids&Structures,2015,64/65:22-29.
[9]LEONARD K R,MALYARENKO E V,HINDERS M K.Ultrasonic Lamb wave tomography[J].Inverse Problems,2002,18(6):1795-1808.
[10]WANG L,ZHANG X,HUANG S,et al.Measured frequency for the estimation of cable force by vibration method[J].Journal of Engineering Mechanics,2014,141(2):06014020.
[11]吴斌,张瑞芳,刘秀成,等.基于纵向模态超声导波陷频特性的钢绞线拉力测量新方法[J].机械工程学报,2016,52(12):9-15.WU B,ZHANG R F,LIU X C,et al.Innovative method for measuring tensile force based on the notch frequency property of longitudinal guided wave in steel strand[J].Journal of Mechanical Engineering,2016,52(12):9-15.(in Chinese)
[12]XU J,WU X,SUN P.Detecting broken-wire flaws at multiple locations in the same wire of prestressing strands using guided waves[J].Ultrasonics,2013,53(1):150-156.
[13]DI-SCALEA F L,RIZZO P,SEIBLE F.Stress measurement and defect detection in steel strands by guided stress waves[J].Journal of Materials in Civil Engineering,2003,15(3):219-227.
[14]刘秀成,吴斌,何存富.磁致伸缩与磁弹一体化传感器的研制[J].机械工程学报,2013,49(22):46-52.LIU X C,WU B,HE C F.Novel design of integrated sensor based on magnetostrictive and elastomagnetic effect[J].Journal of Mechanical Engineering,2013,49(22):46-52.(in Chinese)
[15]刘秀成.磁致伸缩与磁弹一体化传感技术及其钢索检测应用研究[D].北京:北京工业大学,2013.LIU X C.Study on magnetostrictive and elastomagnetic based sensor integration technology for application in steel wire rope inspection[D].Beijing:Beijing University of Technoogy,2013.(in Chinese)
[16]ZHANG R,DUAN Y,OR S W,et al.Smart elastomagneto-electric(EME)sensors for stress monitoring of steel cables:design theory and experimental validation[J].Sensors,2014,14(8):13644-13660.
[17]DUAN Y F,ZHANG R,DONG C Z,et al.Development of elasto-magneto-electric(EME)sensor for in-service cable force monitoring[J].International Journal of Structural Stability and Dynamics,2016,16(4):1640016.
[18]JILES D C.Theory of the magnetomechanical effect[J].Journal of Physics D Applied Physics,1998,28(8):1537-1546.
[19]SUMITRO S,KUROKAWA S,SHIMANO K,et al.Monitoring based maintenance utilizing actual stress sensory technology[J].Smart Materials&Structures,2005,14(3):S68.
[20]吴斌,李强光,刘秀成,等.基于磁特性曲线的杆件拉力测量及影响因素研究[J].仪器仪表学报,2015,36(3):560-567.WU B,LI Q G,LIU X C,et al.Tension measurement method for rod-like structure based on magnetic characteristic curve and its influence factor analysis[J].Chinese Journal of Scientific Instrument,2015,36(3):560-567.(in Chinese)
[21]吴斌,苏楠,刘秀成,等.基于谐波分析的磁弹拉力测量改进方法研究[J].机械工程学报,2015,51(20):54-60.WU B,SU N,LIU X C,et al.Improved method for elastomagnetic effect based tension measurement using harmonic analysis techniques[J].Journal of Mechanical Engineering,2015,51(20):54-60.(in Chinese)
[22]王悦民,康宜华,武新军.磁致伸缩效应在圆管中激励纵向导波的理论和试验研究[J].机械工程学报,2005,41(10):174-179.WANG Y M,KANG Y H,WU X J.Theoretical and experimental study on generation of longitudinal guided waves in circular pipes based on magnetostrictive effect[J].Chinese Journal of Mechanical Engineering,2005,41(10):174-179.(in Chinese)