[보고서]체장어군탐지기용 분할 빔 음향 변환기의 개발

이대재

체장어군탐지기용 분할 빔 음향 변환기의 개발
Development of split beam acoustic transducer for a fish sizing echo sounder 원문보기

보고서 정보
주관연구기관	부경대학교 Pukyong National University
연구책임자	이대재
보고서유형	최종보고서
발행국가	대한민국
언어	한국어
발행년월	2011-04
과제시작연도	2010
주관부처	교육과학기술부
사업 관리 기관	한국연구재단
등록번호	TRKO201200002931
과제고유번호	1345123488
사업명	일반연구자지원
DB 구축일자	2013-05-20
키워드	split beam 음향변환기.sidelobe 억제.가중 transformer.음향중심간격.송파감도.수파감도.4 분할.빔 패턴.체장 측정.split-beam transducer.sidelobe suppression.weighting transformer.acoustic center spacing.TVR.SRT.four quadrants.beam pattern.fish sizing.

초록 ▼

본 연구에서 50kHz 체장 어군 탐지기에서 사용하기 위한 고성능의 split beam 음향변환기가 개발되었다. 이 연구의 궁극적인 목적은 체장어군탐지기에서 요구되는 음향 빔 폭과 음향변환기의 형상은 그대로 유지하면서 어류의 위치각에 대한 dynamic range를 증대시키는데 필요불가결한 sidelobe 레벨을 최대한 억제시키면서 광범위한 영역내에 분포하는 어류를 동시에 탐지하는데 요구되는 수신진동자 블록 사이의 음향중심 간격을 한 파장이하로 최소화시킴으로서 고성능의 split beam 음향변환기를 독자적으로 설계, 개발하는 것이

Abstract ▼

A improved split-beam transducer for a 50 kHz fish sizing echo sounder was developed. The main objective of this study was to minimize the sidelobe level in the beam pattern and the distance between acoustic centers for adjacent transducer quadrants in the geometrical arrangement of array elements while maintaining a given number of transducer elements and beamwidth required for fish sizing in the fishing field, and to develop creatively the related techniques.

목차 Contents

일반연구자지원사업 최종보고서 ... 1
목차 ... 3
I. 연구 계획 요약문 ... 4
1. 국문 요약문 ... 4
II. 연구 결과 요약문 ... 5
1. 한글요약문 ... 5
2. SUMMARY ... 6
III. 연구내용 및 결과 ... 7
1. 연구개발과제의 개요 ... 7
2. 국내외 기술개발 현황 ... 8
3. 연구수행 내용 및 결과 ... 9
4. 목표 달성도 및 관련 분야에의 기여도 ... 38
5. 연구결과의 활용계획 ... 39
6. 연구과정에서 수집한 해외과학기술정보 ... 40
7. 주관연구책임자(공동연구원) 대표적 연구 실적 ... 41
8. 참고 문헌 ... 41
9. 연구 성과 ... 43
10. 기타사항 ... 44
별첨1. 대표연구성과 ... 45
자체평가 의견서 ... 46

표/그림 (26)

표 Equivalent circuit for the longitudinal mode of a 50kHz tonpilz type transducer.
표 Structure and schematic diagram of a 50 kHz tonpilz type transducer developed in this study.
표 A layout for weighting transformers, transducer interface terminal, four receiving transducer quadrants and planar array of 32 identical transducer elements arranged with the inter-element spacing being substantially equal to half the wavelength.
표 Schematic diagram of the experimental setup for measuring the underwater performance characteristics of a developed 50kHz split-beam transducer.
표 Block diagrams showing the electrical connection for transmitting (a) and receiving modes (b) between weighting transformers and transducer elements consisting of the UL quadrant of split beam transducer.
표 A drawing showing the four receiving transducer quadrants in the geometrical arrangement of transducer elements with the distance between acoustic centers of less than one wavelength for each axis and the inter-element spacing of 0.5 wavelength for a 50 kHz split-beam transducer.
표 Comparison of measured electrical impedance magnitude curves for a 50kHz tonpilz type transducer in air (solid line) and in water (circle).
표 Comparison of impedance loops for a 50kHz tonpilz type transducer in air (circle) and in water (diamond).
표 Measured transmitting voltage response (TVR) for a developed 50kHz tonpilz type transducer.
표 Measured receiving sensitivity (SRT) for a developed 50kHz tonpilz type transducer.
표 Photographs for an opened sensor module for four transducer quadrants with pre-amplifiers electronics and amplitude weighting transformers installed on the PCB (a) and a 50 kHz split-beam transducer assembly developed in this study (b).
표 Electrical conductance (a) and susceptance (b) for UL, UR, DL and DR quadrants of a developed 50 kHz split-beam transducer in water
표 Transmitting voltage response (TVR) of a developed 50 kHz split-beam transducer
표 Receiving sensitivity (SRT) for UL, UR, DL and DR quadrants of a developed 50 kHz split beam transducer.
표 Theoretical transmission beam pattern (a) and contour view of equal sensitivity in sound beam (b) for a 50 kHz split-beam transducer shaded by the Dolph-Chebyschev weighting method. A design goal of side lobe level was -30dB.
표 Measured transmission beam patterns in horizontal (a) and vertical planes (b) for a developed 50 kHz split-beam transducer consisting of 32 elements with one element in each corner missing.
표 Measured reception beam patterns for UL, UR, DL and DRMeasured reception beam patterns for UL, UR, DL and DR quadrants shaded by using the transformer to obtain the spacing of approximately one wavelength between acoustic centers in a developed 50 kHz split-beam transducer.
표 Transmitting pulse signal from a developed 50 kHz split-beam transducer measured by using B&K 8105 hydrophone
표 Receiving pulse responses for UL, UR, DL and DR quadrants of a developed 50 kHz split-beam transducer. The pulse signal was transmitted from a 50kHz ultrasonic pinger developed to test the transducer.
표 Relationship between electrical phase angle and mechanical angle of underwater target to be detected in the sound beam with a varying spacing between acoustic centers for the pair of transducer quadrants of split beam transducer.
표 Relationship between the angular bearing of target and the inter-center spacing between the pair of transducer quadrants (d)/wavelength ( λ) for a 50kHz split-beam transducer.
표 Effect of the sidelobe level in the directivity pattern influencing the range of angular bearing for correct target tracking without the positional ambiguity. The range of angular bearing increases with decreased level of side lobes.
표 The angular bearing limit usable in measuring the angular position without the positional ambiguity of target for a 50kHz split beam transducer with the inter-center spacing of 0.96 wavelength developed in this study.
표 Echo signals from a cuttlebone target received by the four pairs of the transducer quadrant blocks of split-beam transducer.
표 Curves showing the directivity correction factor in the horizontal (a) and in the vertical planes (b) of a 50kHz split-beam transducer.
표 Phase comparisons of 50kHz transponder signals received from the fore and aft halves in the vertical plane (a) and from the left and right halves in the horizontal plane (b) of split-beam transducer quadrants.

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연구책임자(Manager) :	-
과제기간(DetailSeriesProject) :	-
총연구비 (DetailSeriesProject) :	-
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과제수행기간(LeadAgency) :	-
연구목표(Goal) :	-
연구내용(Abstract) :	-
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연합인증

체장어군탐지기용 분할 빔 음향 변환기의 개발
Development of split beam acoustic transducer for a fish sizing echo sounder 원문보기