Abstract
Nowadays the development of automated inspection systems based on six degrees of freedom robotic manipulators is a highly relevant topic in ultrasonic non-destructive testing. One of the issues associated with such development is the problem of acquiring high-resolution results. In this article, the application Phase-Reversal Fresnel Zone Plates is considered for solving this problem. Such acoustic lenses can solve the task of high-resolution results acquisition by using a single unfocused transducer. Furthermore, Phase-Reversal Fresnel Zone Plates can provide the desired focusing depth with the fixed thickness of the coupling layer. It is important in the case of application of devices which provide localized coupling. In this paper a proper design of Phase-Reversal Fresnel Zone Plate was determined according to the conditions of planned experiments. Its efficiency was verified via the Finite Element Method modeling. In all performed experiments the relative error of flaws size estimation did not exceed 6% whereas the signal-to-noise ratio was not lower than 17.1 dB. Thus, experimental results demonstrate that the application of Phase-Reversal Fresnel Zone Plates allowed to obtain results with high lateral resolution and signal-to-noise ratio. These results demonstrate the reasonability of the development of devices that provide localized coupling and use Phase-Reversal Fresnel Zone Plates.
Highlights
Nowadays, the development and introduction of testing systems based on six degrees of freedom robotic manipulators is the trend in ultrasonic non-destructive evaluation.The application of such manipulators allows the limitations of manual inspections to be overcome
The results demonstrate the efficiency of the Phase-Reversal Fresnel Zone Plates (PR-FZP) application
The application of PR-FZP for imaging in ultrasonic nondestructive testing has been considered. This interest is associated with their application in robotic ultrasonic testing in conjunction with devices that provide localized coupling
Summary
The development and introduction of testing systems based on six degrees of freedom robotic manipulators is the trend in ultrasonic non-destructive evaluation. The application of such manipulators allows the limitations of manual inspections to be overcome. Six-degrees of freedom robotic manipulators allow for the building of a scanning path with respect to the geometry of the surface of the testing specimen. Systems based on six degrees of freedom robotic manipulators are flexible to the changes in objects to control and test conditions Such testing systems are able to perform high-speed scanning of the objects. The application of such systems allows the testing to be performed in dangerous environments without the necessity of staff presence
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
