Chapter 5
An Improved Beam Method for Acoustic
Emission Source Localization in Thin
Plates
Zihao Zhao, Ran Zhao, Xianlei Ye, Jianwen Wang, Tian He, and Qiang Pan
Abstract Using beamforming method to localize the AE source has been developed
for years. However, if there is no accurate wave speed, the localizing results of beamforming may have a great deviation. After analyzing the beamforming localization
characteristics, by comparing the two arrays of localizing effect, an improved beamforming method based on X array is proposed to reduce the localization error caused
by the uncertainty of array direction and speed. The pencil-lead-broken experiment
on a thin plate is conducted to verify the presented method, the result shows that
this method can effectively localize the AE source under the condition of unknown
accurate localizing speed.
5.1 Introduction
Acoustic emission technology has been widely applied in the field of nondestructive
testing. This method can directly detect the energy released by the artifacts without
providing energy to the inspected object. Therefore, acoustic emission testing has
been widely applied in metalworking [1], welding monitoring [2], civil engineering
[3].
Acoustic emission source location is one of the important applications of acoustic
emission technology. Beamforming method is a common source localizing method.
Time difference of arrival (TDOA) is a conventional AE localization method, and it
has become the most popular tool to estimate AE source location to date [4]. Recently
Z. Zhao · R. Zhao · J. Wang · T. He (B) · Q. Pan
School of Transportation Science and Engineering, Beihang University, Beijing 100191, China
e-mail: hetian@buaa.edu.cn
Z. Zhao
e-mail: fant0709@buaa.edu.cn
X. Ye
Aerospace Technology Research Institute, China Aerospace Science and Industry Corp, Beijing
100174, China
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021
G. Shen et al. (eds.), Advances in Acoustic Emission Technology, Springer Proceedings
in Physics 259, https://doi.org/10.1007/978-981-15-9837-1_5
53
An Improved Beam Method for Acoustic
Emission Source Localization in Thin
Plates
Zihao Zhao, Ran Zhao, Xianlei Ye, Jianwen Wang, Tian He, and Qiang Pan
Abstract Using beamforming method to localize the AE source has been developed
for years. However, if there is no accurate wave speed, the localizing results of beamforming may have a great deviation. After analyzing the beamforming localization
characteristics, by comparing the two arrays of localizing effect, an improved beamforming method based on X array is proposed to reduce the localization error caused
by the uncertainty of array direction and speed. The pencil-lead-broken experiment
on a thin plate is conducted to verify the presented method, the result shows that
this method can effectively localize the AE source under the condition of unknown
accurate localizing speed.
5.1 Introduction
Acoustic emission technology has been widely applied in the field of nondestructive
testing. This method can directly detect the energy released by the artifacts without
providing energy to the inspected object. Therefore, acoustic emission testing has
been widely applied in metalworking [1], welding monitoring [2], civil engineering
[3].
Acoustic emission source location is one of the important applications of acoustic
emission technology. Beamforming method is a common source localizing method.
Time difference of arrival (TDOA) is a conventional AE localization method, and it
has become the most popular tool to estimate AE source location to date [4]. Recently
Z. Zhao · R. Zhao · J. Wang · T. He (B) · Q. Pan
School of Transportation Science and Engineering, Beihang University, Beijing 100191, China
e-mail: hetian@buaa.edu.cn
Z. Zhao
e-mail: fant0709@buaa.edu.cn
X. Ye
Aerospace Technology Research Institute, China Aerospace Science and Industry Corp, Beijing
100174, China
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021
G. Shen et al. (eds.), Advances in Acoustic Emission Technology, Springer Proceedings
in Physics 259, https://doi.org/10.1007/978-981-15-9837-1_5
53