Choosing Phased Array Pitch in Ultrasonic Tomography of Materials with Inhomogeneous Structure
Source abstract
Abstract
The influence of phased array (PA) pitch on signal/pattern-noise ratio when probing objects with inhomogeneous structure by low-aperture transducers of transverse acoustic waves is considered. A saturation phenomenon has been discovered for small PA pitches. The phenomenon is due to the influence of positive cross correlation between pattern-noise instances at neighboring receiving transducers. The optimum PA pitch has been determined to be approximately 0.5 of the wavelength when probing the object area across the PA and 0.4 of the wavelength when probing areas at the side of the PA. Experimental research has been carried out and proved the validity of the theoretical results.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Industrial Engineering and Technologies · Geotechnical and Geomechanical Engineering · Engineering Technology and Methodologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (8)
Show source-provided references
1. Kozlov, VN., Samokrutov, AA., and Shevaldykin, VG., Ultrasonic defectoscopy of concrete by the pulse-echo method: state of the art and prospects, V Mire Nerazrushayushchego Kontrolya, 2002, no. 2(16), pp. 6–10.
2. Schickert, M, Progress in ultrasonic imaging of concrete, Mater. Struct., 2005, vol. 38, no. 9, pp. 807–815.10.1007/BF02481653 ↗
3. Schickert, M, Towards SAFT-imaging in ultrasonic inspection of concrete, in Int. Symp. Non-Destr. Test. Civ. Eng. (NDT-CE), 1995, pp. 411–418.
4. Levesque, D, Blouin, A, Neron, C, and Monchalin, J-P., Performance of laser ultrasonic F-SAFT imaging, Ultrasonics, 2002, pp. 1057–1063.
5. Kozlov, VN., Samokrutov, AA., and Shevaldykin, VG., Ultrasonic low-frequency transducer, RF Patent No. 2082163, Byull. Izobret., 1997, no. 17.
6. Kozlov, VN., Samokrutov, AA., Yakovlev, AV., Shevaldykin, VG., and Kovalev, AV., Ultrasonic B- and C-tomography of coarse-grain materials by pulsed echo method, Prib. Sist. Upr., 1989, no. 7, pp. 21–23.
7. Kachanov, VK., Kartashev, VG., Sokolov, IV., Voronkova, LV., and Shalimova, EV., Strukturnyi shum v ul’trazvukovoi defektoskopii (Pattern Noise in Ultrasonic Defectoscopy), Moscow: MPEI, 2016.
8. Salekh Salem, AZ., Kartashev V.G., Shalimova E.V., Kachanov V.K., Sokolov I.V. Effect of antenna-array pitch on the efficiency of revealing signal in pattern noise in defectoscopy, Izmer. Tekh., 2016, no. 7, pp. 61–66.