{"title":"Calibrating high-precision transdu cer acoustic phase centers in outfield experiments: Track design, performance analysis and model improvement","authors":"","doi":"10.1016/j.apacoust.2024.110179","DOIUrl":null,"url":null,"abstract":"<div><p>Underwater acoustic positioning is applied in seabed exploration, resource development, and environmental monitoring. The transducer plays an essential role in enabling underwater acoustic localization. To address the issue of the non-coincidence between the acoustic phase center and the geometric center of the transducer, this paper proposes a high-precision calibration method for the acoustic phase center of a transducer, specifically designed for implementation in outfield experiments. This method involves creating a virtual long baseline by converting a fixed beacon into a moving point in the carrier coordinate system via coordinate transformation. The acoustic phase center of the transducer can then be reverse-calibrated. By combining principles of observability, symmetry, and round-trip behavior with changes in the original and virtual tracks, several unresolvable features and corresponding tracks are revealed which contribute to the calibration's precision. Additionally, an improved model to resolve mismatching in the outfield response mode is also established. Outfield experiment results show that compared to the uncalibrated acoustic phase center, the proposed method improves positioning accuracy from 0.63 m to 0.22 m. Compared with the internal field calibration method, the positioning accuracy is equivalent, furthermore, this method overcomes the defect of demanding requirement of measurement environment.</p></div>","PeriodicalId":55506,"journal":{"name":"Applied Acoustics","volume":null,"pages":null},"PeriodicalIF":3.4000,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Acoustics","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0003682X2400330X","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ACOUSTICS","Score":null,"Total":0}
引用次数: 0
Abstract
Underwater acoustic positioning is applied in seabed exploration, resource development, and environmental monitoring. The transducer plays an essential role in enabling underwater acoustic localization. To address the issue of the non-coincidence between the acoustic phase center and the geometric center of the transducer, this paper proposes a high-precision calibration method for the acoustic phase center of a transducer, specifically designed for implementation in outfield experiments. This method involves creating a virtual long baseline by converting a fixed beacon into a moving point in the carrier coordinate system via coordinate transformation. The acoustic phase center of the transducer can then be reverse-calibrated. By combining principles of observability, symmetry, and round-trip behavior with changes in the original and virtual tracks, several unresolvable features and corresponding tracks are revealed which contribute to the calibration's precision. Additionally, an improved model to resolve mismatching in the outfield response mode is also established. Outfield experiment results show that compared to the uncalibrated acoustic phase center, the proposed method improves positioning accuracy from 0.63 m to 0.22 m. Compared with the internal field calibration method, the positioning accuracy is equivalent, furthermore, this method overcomes the defect of demanding requirement of measurement environment.
期刊介绍:
Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense.
Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems.
Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.