.png){kind=icon}
.png){kind=icon}
Return
Three-dimensional penetrating imaging of internal defects of external insulation equipment based on multi-trajectory CSAR detection with the UWB impulse radar
.png){kind=icon}
PRE
AI
C
S
Q
W
C
Z
Z
DOI：10.1016/j.epsr.2026.113018.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
In this paper, a three-dimensional (3D) penetrating imaging method for internal insulation defects based on multi-trajectory CSAR detection with the UWB impulse radar is proposed. Unlike the two-dimensional detection, the 3D detection radar transmits and receives signals in spatial direction, it results in the change of the polarization direction of the propagating waves, since there is always an angle between the wave and the interface of the object, causing the reduction of signal strength and 3D information. To acquire the missing 3D information, a multi-trajectory detection method is proposed to detect the target in different top-down views. Then, the defects can be imaged based on the 3D information extracted from the echo signals with back projection algorithm. During the detection, since the external insulation equipment is always of 3D shed structure, tiny difference in incident angles may lead to completely different propagation paths. Therefore, the propagation path should be accurately simulated before imaging with back projection. Thus, the calculation method for the 3D propagation path is proposed, where it traces a ray beam to simulate the propagation behaviors of the impulses, and then the imaging space is traversed by the paths of the rays. The 3D detection capacity of the proposed method is verified by the simulation first, and then the practical detection effectiveness is verified by the comparison experiment of an intact insulator and a defective one. The experimental results indicate that the shape of the defect agrees with the practical situation. The position deviation is only 3.7 mm, the relative deviation in z direction is 0.7% compared to the length of object. It demonstrates that the proposed 3D detection method can image and locate the inside defect of the external insulation with high accuracy.
Keywords:
External insulation equipment
Insulation defects
Three-dimensional detection
Penetrating imaging
UWB impulse radar
Journal
IF:
4.2
Papers:
1.1W
Citations:
2.2W
Organization
Cited Papers