An FBG acoustic emission source locating system based on PHAT and GA

Abstract

Using the acoustic emission locating technology to monitor the health of the structure is important for ensuring the continuous and healthy operation of the complex engineering structures and large mechanical equipment. In this paper, four fiber Bragg grating (FBG) sensors are used to establish the sensor array to locate the acoustic emission source. Firstly, the nonlinear locating equations are established based on the principle of acoustic emission, and the solution of these equations is transformed into an optimization problem. Secondly, time difference extraction algorithm based on the phase transform (PHAT) weighted generalized cross correlation provides the necessary conditions for the accurate localization. Finally, the genetic algorithm (GA) is used to solve the optimization model. In this paper, twenty points are tested in the marble plate surface, and the results show that the absolute locating error is within the range of 10 mm, which proves the accuracy of this locating method.

References

[1] ErnstR, ZwimpferF. J. Dual. Ultrasonics, 2016, 64: 139

[2] ZhaoN, DingKQ. Applied Mechanics and Materials, 2013, 330: 396

[3] WangQ, GaoS H, ZhuL, ZouB, JiangS X. Safety Health & Environment, 2016, 16: 37

[4] ZhangH F, ChenX, MaB L, LiZ L, ZhangH D, LiuZ C. Automation in Petro-Chemical Industry, 2015, 51: 53

[5] KunduT. Ultrasonics, 2014, 54: 25

[6] KangY, ZhuW, ChenG, YinX. Rock and Soil Mechanics, 2011, 32: 2079

[7] ZhengZ, HuaJ, JiangB, LuW, WenH, YuX. Chinese Journal of Sensors and Actuators, 2013, 26: 722

[8] ShanY, SunP, XuY, FuH, XieS. Chinese Journal of Sensors and Actuators, 2013, 26: 402

[9] OsuchT, GasiorP, MarkowskiK, JedrzejewskiK. Bulletin of the Polish Academy of Sciences Technical Sciences, 2014, 62: 627

[10] LuJ, WangB, LiangD. Applied Optics, 2013, 52: 2346

[11] ZhangY, ZhaoC, ChenJ. Chinese Journal of Quantum Electronics, 2013, 30: 608

[12] ZhangY K, GuoY X, LiG F. Journal of Optoelectronics ·Laser, 2016, 26: 250

[13] ZhouY H, ZhaoZ G, LiY N, ZhangC S, XieT, CuiZ G, WangK, TanX Y, LiC. Journal of Optoelectronics ·Laser, 2015, 26: 422

[14] ChenG-h, LiangJ, WangX-h. Journal of South China University of Technology (Natural Science Edition), 2013, 41: 142

[15] KaphleM, TanA C C, ThambiratnamD P, ChanT H T. Structural Control & Health Monitoring, 2012, 19: 187

[16] WangW, ZengZ, YiboL I. Computer Engineering & Applications, 2013, 49: 230

[17] JinZ, JiangM, SuiQ, SaiY, LuS, CaoY, ZhangF, JiaL. Chinese Journal of Sensors & Actuators, 2013, 26: 1513

[18] HuangX H, ZhangY B, TianB Z, LiuX X. Yantu Lixue/rock & Soil Mechanics, 2015, 36: 381

This work has been supported by the National Natural Science Foundation of China (No.41472260), the Fundamental Research Funds of Shandong University (No.2016JC012), and the Young Scholars Program of Shandong University (No.2016WLJH30).