IMAGE RECONSTRUCTION OF CONCRETE BASED ON FILTERED BACKPROJECTION METHOD USING ULTRASONIC TIME OF FLIGHT DATA
Honghui Fan1, 2, Hongjin Zhu1, 3, Qingbang Han4
1School of Computer Engineering, Jiangsu University of Technology, Changzhou 213001, Jiangsu, China
2Sichuan Province Key Laboratory of Bridge non-destructive testing and engineering computing, Zigong 643000, Sichuan, China
3Key Laboratory of Cloud Computing & Intelligent Information Processing of Changzhou City, Changzhou 213001, Jiangsu, China
4College of IOT Engineering, Hohai University, Jiangsu 213022, China
This research aims to recognize the defect of concrete materials using an ultrasonic computed tomography imaging technique. Filtered Backprojection method was used to reconstruct concrete images in this paper. Ultrasonic time of flight data was measured to reconstruct computer tomography images. 306 data paths were obtained in total by manual scanning for one computer tomography image. We examined the effect of the interpolation data as the density of time of flight data has a considerable effect on image quality. The feasibility of concrete reconstruction system and time of flight data interpolation were examined in detail using numerical and concrete phantoms.