- Volume 20 Issue 4
Implementation of Sonar Bearing Accuracy Measurement Equipment with Parallax Error and Time Delay Error Correction
관측위치오차와 시간지연오차를 보정하는 소나방위정확도 측정 장비 구현
- Kim, Sung-Duk (LIGNex1) ;
- Kim, Do-Young (LIGNex1) ;
- Park, Gyu-Tae (LIGNex1) ;
- Shin, Kee-Cheol (LIGNex1)
- Received : 2019.09.18
- Accepted : 2019.09.30
- Published : 2019.12.31
Sonar bearing accuracy is the correspondence between the target orientation predicted by sonar and actual target orientation, and is obtained from measurements. However, when measuring sonar bearing accuracy, many errors are included in the results because they are made at sea, where complex and diverse environmental factors are applied. In particular, parallax error caused by the difference between the position of the GPS receiver and the sonar sensor, and the time delay error generated between the speed of underwater sound waves and the speed of electromagnetic waves in the air have a great influence on the accuracy. Correcting these parallax errors and time delay errors without an automated tool is a laborious task. Therefore, in this study, we propose a sonar bearing accuracy measurement equipment with parallax error and time delay error correction. The tests were carried out through simulation data and real data. As a result of the test it was confirmed that the parallax error and time delay error were systematically corrected so that 51.7% for simulation data and more than 18.5% for real data. The proposed method is expected to improve the efficiency and accuracy of sonar system detection performance verification in the future.
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