Chapter 31
Research on Immersion-Type Acoustic
Emission Detection and Location Method
for Large Tank Bottom
Junwei Gao, Ying Zhang, Shi Liu, and Zidong Zhu
Abstract When the acoustic emission technology is used to detect the corrosion
of the large tank bottom plate, it is not easy to collect information in the central
area of the floor due to the attenuation of the corrosion acoustic emission signal,
and the detection blind zone is formed. Immersion acoustic detection technology
is an effective method to solve the above problem. By using the detector to carry
several immersion acoustic sensors into the tank from the manhole, the tank bottom
plate is detected in different regions according to the preset route, so as to realize the
global detection of the large tank bottom plate. The location of the corrosion source
of the tank floor is a key technology when using immersion acoustic testing. To
this end, sound source passive positioning method based on time delay estimation,
combined with the characteristics of tank bottom immersion acoustic detection, a
planar small array unit acoustic positioning method is established. By simulating
the tank bottom plate positioning experiment, it can be known that the error of the
positioning method in the direction finding accuracy and the ranging accuracy meets
the requirements. Using the experimental data, the maximum effective radius R of the
immersed acoustic detection unit was determined. According to the large-scale tank
immersion acoustic detection method, a prototype of the tank bottom plate acoustic
detector was designed.
Y. Zhang (B)
College of Environmental and Safety Engineering, Changzhou University, Changzhou, Jiangsu,
China
e-mail: aezy163@163.com
J. Gao
College of Mechanical Science and Engineering, Northeast Petroleum University, Daqing,
Heilongjiang, China
S. Liu · Z. Zhu
Shenyang Longchang Pipeline Testing Center, Shenyang, Liaoning, 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_31
363
Research on Immersion-Type Acoustic
Emission Detection and Location Method
for Large Tank Bottom
Junwei Gao, Ying Zhang, Shi Liu, and Zidong Zhu
Abstract When the acoustic emission technology is used to detect the corrosion
of the large tank bottom plate, it is not easy to collect information in the central
area of the floor due to the attenuation of the corrosion acoustic emission signal,
and the detection blind zone is formed. Immersion acoustic detection technology
is an effective method to solve the above problem. By using the detector to carry
several immersion acoustic sensors into the tank from the manhole, the tank bottom
plate is detected in different regions according to the preset route, so as to realize the
global detection of the large tank bottom plate. The location of the corrosion source
of the tank floor is a key technology when using immersion acoustic testing. To
this end, sound source passive positioning method based on time delay estimation,
combined with the characteristics of tank bottom immersion acoustic detection, a
planar small array unit acoustic positioning method is established. By simulating
the tank bottom plate positioning experiment, it can be known that the error of the
positioning method in the direction finding accuracy and the ranging accuracy meets
the requirements. Using the experimental data, the maximum effective radius R of the
immersed acoustic detection unit was determined. According to the large-scale tank
immersion acoustic detection method, a prototype of the tank bottom plate acoustic
detector was designed.
Y. Zhang (B)
College of Environmental and Safety Engineering, Changzhou University, Changzhou, Jiangsu,
China
e-mail: aezy163@163.com
J. Gao
College of Mechanical Science and Engineering, Northeast Petroleum University, Daqing,
Heilongjiang, China
S. Liu · Z. Zhu
Shenyang Longchang Pipeline Testing Center, Shenyang, Liaoning, 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_31
363