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Article type: Research Article
Authors: Fan, Di | Wang, Ying | Meng, Qi | Ti, Xuan | Cao, Maoyong*
Affiliations: Shandong University of Science and Technology, Qingdao, Shandong, China
Correspondence: [*] Corresponding author: Maoyong Cao, 579 Qianwangang Road, Huangdao District, Qingdao 266590, Shandong, China. E-mail: my-cao@263.net.
Abstract: In obtaining the travel time of sound/time difference in ultrasonic measurements, locating the ultrasonic wave head is pivotal. The existing location/detection methods are poor in terms of accuracy and anti-jamming capability. Therefore, they cannot be used in certain high precision fields. Hence, this study develops a novel method based on spectrum-subtracted sub-band singular spectrum entropy (SSB-SSE), which locates the wave head by introducing both sub-band and spectrum subtraction into singular spectrum entropy (SSE). Furthermore, this study generates a reasonable sub-band selection technique. Simulation experiments demonstrate that SSB-SSE is more accurate, robust, and capable of anti-jamming than other existing spectrum entropies. Therefore it can locate ultrasonic wave heads more effectively in layered media measurements.
Keywords: Singular spectrum entropy, sub-band, spectrum subtraction, ultrasonic wave head
DOI: 10.3233/JCM-170756
Journal: Journal of Computational Methods in Sciences and Engineering, vol. 17, no. 4, pp. 733-743, 2017
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