• 제목/요약/키워드: Acoustic releaser

검색결과 4건 처리시간 0.014초

Acoustic releaser 제어를 위한 강인한 수중음향신호 인식 알고리즘의 개발 (A Development of Robust Underwater Sound Signal Recognition Algorithm for Acoustic Releaser)

  • 김영진;허경무
    • 전자공학회논문지SC
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    • 제41권3호
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    • pp.33-38
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    • 2004
  • 본 논문에서는 해저의 환경변화에 따른 외란 요소에 영향을 받지 않고, 안정적으로 음파신호를 인식할 수 있는 수중음향 신호인식 알고리즘을 제안하였다. 제안하는 알고리즘은 배터리에 의존하여 장시간 운용되어야하는 시스템에 적합한 저소비전력형으로서, 신속하게 음파신호를 인식할 수 있고 해양환경 변화에 대한 안정성을 확보할 수 있으며, 이의 효율성을 수학적모델에 따른 수치시험과 회로실험을 통하여 확인하였다.

심해저용 원격 착탈 시스템 제어를 위한 수중음향신호 인식 알고리즘의 개발 (A Development of Underwater Sound Signal Recognition Algorithm for Acoustic Releaser in the Seafloor)

  • 김영진;우종식;조영준;허경무
    • 제어로봇시스템학회논문지
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    • 제10권5호
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    • pp.421-427
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    • 2004
  • In order to exploit underwater resources successfully, the first step would be a marine environmental research and exploration in the seafloor. Generally one sets up a long-term underwater experimental unit in the seafloor and retrieves the unit later after a certain period time. Essential to these applications is the reliable teleoperation and telemetering of the unit. In this paper we presents a robust underwater sound recognition algorithm by which we can identify the sound signal without the influence of disturbances due to underwater environmental changes. The proposed method provides a means suitable for the acoustic releaser which requires low power dissipation and long-time underwater operation. We demonstrate its ability of securing stability and fast sound recognition through simulation methods.

A Study on the Detection Algorithm of an Advanced Ultrasonic Signal for Hydro-acoustic Releaser

  • Kim, Young-Jin;Huh, Kyung-Moo;Cho, Young-June
    • International Journal of Control, Automation, and Systems
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    • 제6권5호
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    • pp.767-775
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    • 2008
  • Methods used for exploring marine resources and spaces include positioning a probe under water and then recalling it after a specified time. Hydro-acoustic Releasers are commonly used for positioning and retrieving of such exploration equipment. The most important factor in this kind of system is the reliability for recalling the instruments. The frequently used ultrasonic signal detection method can detect ultrasonic signals using a fixed comparator, but because of increased rates of errors due to outside interferences, information is repetitively acquired. This study presents an effective ultrasonic signal detection algorithm using the characteristics of a resonance and adaptive comparator Combined with the FSK+ASK modulator. As a result, approximately 8.8% of ultrasonic wave communication errors caused by background noise and transmission losses were reduced for effectively detecting ultrasonic waves. Furthermore, the resonance circuit's quality factor was enhanced (Q = 120 to 160). As such, the bias voltage of the transistor (Vb= 3.3 to 6.8V) was increased thereby enhancing the frequency's selectivity.