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권휴상(Kwon, Hyu-Sang),박성철(Park, Seong-Chol),조승현(Cho, Seung-Hyun),이승석(Lee, Seung-Seok),김진연(Kim, Jin-Yeon) 한국소음진동공학회 2009 한국소음진동공학회 논문집 Vol.19 No.1
This paper describes a general approach for processing data from an omni-directional guided wave transducer array for the rapid inspection of large plate structures. A basic phased array algorithm is presented that can be applied to any array geometry. For guided waves on plate, beam steering algorithm is derived and the corresponding beam pattern is analyzed. The algorithms are applied to simulation and experimental data. The results show well its usefulness in structural applications.
원통면 음향 홀로그래피를 이용한 수중음향 곡면배열센서의 빔 해석
권휴상(Kwon, Hyu-Sang),박성철(Park, Seong-Chol),서희선(Seo, Hee-Seon),신구균(Shin, Gu-Kyun),조치영(Joh, Ghee-Young) 한국소음진동공학회 2009 한국소음진동공학회 논문집 Vol.19 No.10
As an experimental technique to analyze the far-field characteristics of underwater cylindrical array sensors, cylindrical acoustic holography is studied. Inside an laboratory water tank, far-field directivity patterns as well as near-field source images are reconstructed from the measured hologram by hydrophone array. Approximate equation for far-field directivity estimation is derived based on stationary phase method. The simulation and experiment show well usefulness of the proposed method in application of underwater array sensors.