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논문 기본 정보

자료유형
학술저널
저자정보
Young-Jin Kim (한국생산기술연구원) Kyung-Moo Huh (단국대학교) Young-June Cho (한국생산기술연구원)
저널정보
대한전기학회 International Journal of Control Automation and Systems International Journal of Control Automation and System Vol.6 No.5
발행연도
2008.10
수록면
767 - 775 (9page)

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초록· 키워드

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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.

목차

Abstarct
1. INTRODUCTION
2. FSK + ASK COMBINED ULTRASONIC SIGNAL
3. ALGORITHM OF ADVANCED HYDRO-ACOUSTIC SIGNAL RECOGNITION
4. EXPERIMENTS
5. CONCLUSIONS
REFERENCES

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UCI(KEPA) : I410-ECN-0101-2010-560-001919293