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IoT와 AI 기술기반의 야생동물 퇴치장치의 필드 테스트 및 신뢰성 시험에 관한 연구
길민식(M. S. Ghil),곽동걸(D. K. Kwak),윤형도(H. D. Yoon),나완용(W. Y. Rha) 전력전자학회 2021 전력전자학술대회 논문집 Vol.2021 No.11
In recent years, damage to crops caused by wild animals has been continuously increasing. To date, various methods have been tried to reduce the damage to crops caused by wild animals. However, since the existing products are mainly products with simple functions, the effectiveness of eradication is low due to frequent breakdowns, noise pollution, waste of manpower, and the learning of wild animals. In addition, in the case of an electric fence or fence, it causes environmental pollution and is not good for aesthetics. To solve this problem, an IoT device equipped with a multi-sensor was developed and implemented, and field tests and reliability environmental tests were conducted due to the characteristics of the equipment operated outdoors. The reliability environmental test consisted of high-temperature operation test, thermal shock test, high-temperature, high-humidity test, and vibration test. In the field test, three remotely installed devices constitute a wireless communication network to collect sensor data and image information in real time through a cloud server, and The remote control test was repeatedly conducted through a smart phone app.
윤형도,강기성,채기병,소대화 명지대학교 자연과학연구소 1993 자연과학논문집 Vol.10 No.-
In this thesis, an waveguide for a single optical modulator which is fabricated on X-cut LiNbO₃substrate by proton exchange process is studied. After proton exchange process, annealing process gave an effect on the fabrication of the waveguide. The relationship between refractive index change of waveguide and maximum output was obtained, varying the annealing time for between 30 minutes and 260 minutes. A self-aligned method was used to simplify the fabrication process of the waveguide and to maximize efficiency of electric field. The depth of the diffused waveguide which was measured by using α-step was about 4 μm. The result was almost the same as simulation result. Also,an image reversal method was used to increase conductivity of electrode.