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Implementation of a real-time small draft observation system using triangular correction algorithms
강영관,김상우,이우진,임재홍 한국마린엔지니어링학회 2023 한국마린엔지니어링학회지 Vol.47 No.3
Herein, at the request of the Korea Coast Guard, we propose a LoRaWAN-based small observation system that can quickly find survivors at sea by measuring the speed, direction, and distance between a ship and mobile device in real time. This system was implemented and verified in the early stages of rescue after maritime vessel accidents. GPS signals often transmit considerable errors; therefore, correction algorithms using an improved triangulation method are required to accurately indicate the direction of the currents in real time. The remainder of this paper is organized as follows: Section 1 describes rescue operations following maritime accidents. Chapter 2 describes the methods and theories for GPS triangulation and features of LoRaWAN communication. The critical distance error-cor-rection algorithm for GPS signals and its improvement are explained and expanded. Section 3 discusses the design and analysis of the small-draft observation system. Section 4 presents the testing and implementation of both ship-to-shore environments. Finally, Section 5 concludes the study with expected impacts and future effects.
다중 GPS 삼각측량보정법을 이용한 LoRaWAN기반 실시간 해류관측시스템 개발
강영관 ( Young-gwan Kang ),이우진 ( Woo-jin Lee ),임재홍 ( Jae-hong Yim ) 한국센서학회 2022 센서학회지 Vol.31 No.1
Herein, we propose a LoRaWAN-based small draft system that can measure the ocean current flow (speed, direction, and distance) in real time at the request of the Coast Guard to develop a device that can promptly find survivors at sea. This system has been implemented and verified in the early stages of rescue after maritime vessel accidents, which are frequent. GPS signals often transmit considerable errors, so correction algorithms using the improved triangulation method algorithm are required to accurately indicate the direction of currents in real time. This paper is structured in the following manner. The introduction section elucidates rescue activities in the case of a maritime accident. Chapter 2 explains the characteristics and main parameters of the GPS surveying technique and LoRaWAN communication, which are related studies. It explains and expands on the critical distance error correction algorithm for GPS signals and its improvement. Chapter 3 discusses the design and analysis of small draft buoys. Chapter 4 presents the testing and validation of the implemented system in both onshore and offshore environments. Finally, Section 5 concludes the study with the expected impact and effects in the future.