이 애플리케이션의 일부 콘텐츠는 현재 사용할 수 없습니다.
이 상황이 계속되면 다음 주소로 문의하십시오피드백 및 연락
1. (WO2019066654) FRAME WITH ACOUSTIC SOURCES FOR MARINE SURVEY
유의사항: 이 문서는 자동 광학문자판독장치(OCR)로 처리된 텍스트입니다. 법률상의 용도로 사용하고자 하는 경우 PDF 버전을 사용하십시오

CLAIMS

1. A marine survey system (100) for ultrahigh resolution (UHR) mapping of a marine bottom (B) below a body of water (W), the system (100) comprising a frame (20) to be towed as a unit by one or more towing cables (12) at a distance (Xf) behind a marine vessel (10) moving over the water (W) in a first direction (V), the frame (20) comprising a rigid framework (23) and a plurality of independent acoustic sources (21), wherein each acoustic source (21) is controllable to emit a separate acoustic wave (A) propagating through the water (W) and reflecting off bottom regions at or inside the marine bottom (B) for the mapping thereof, wherein the acoustic sources (21) are kept fixated by the rigid framework (23) at a source-to-source distance (Ys) less than four meters in a transverse direction (Y)

perpendicular to the movement direction (V) of the vessel (10) for

distinguishing the bottom regions with a resolution (Ry) of less than two meters at least in the transverse direction (Y).

2. The system according to claim 1, comprising at least two streamers (30) attached to the frame (20), each streamer (30) comprising a string of acoustic receivers (31) towed in a line behind the vessel (10), wherein the acoustic receivers (31) are linearly arranged in the movement direction (V) of the vessel (10).

3. The system according to claim 2, wherein the plurality of independent acoustic sources (21) are all arranged in the transverse direction (Y) between two adjacent streamers (30) attached to the frame (20).

4. The system according to claim 2 or 3, wherein at least two inner streamers (30) are attached to the frame (20) and at least two outer

streamers are towed directly by the vessel (10) without attachment to the frame (20).

5. The system according to any of the preceding claims, wherein acoustic receivers (31) are arranged at a receiver-to-receiver distance (Xr) of less than four meters for distinguishing the bottom regions with an ultrahigh resolution (Rx) also in a tangential direction (X) parallel to the movement direction (V) of the vessel (10).

6. The system according to any of the preceding claims, wherein each acoustic source (21) comprises a respective array of acoustic

transducers, wherein the acoustic transducers of the respective array are configured to fire in unison to collectively emit the separately detectable respective acoustic wave (A).

7. The system according to any of the preceding claims, wherein the source-to-source distance (Ys) is more than half a meter.

8. The system according to any of the preceding claims, wherein the frame (20) comprises one or more floatation devices (22) to keep the frame

(20) at least partially afloat with the acoustic sources (21) at a fixed source depth (Zs) below a surface (Sw) of the water (W)

9. The system according to any of the preceding claims, comprising a controller (50) arranged and/or programmed, to perform the operational acts including control of the acoustic sources (21) to emit the respective acoustic waves (A) and receiving and/or processing of signals from the acoustic receivers (31).

10. The system according to any of the preceding claims, comprising one or more positioning units (24) attached to the frame (20) with a known relative position or positions with respect to the acoustic sources (21).

11. The system according to any of the preceding claims, wherein the frame (20) comprises a wireless transmitter and/or receiver (25) configured to transmit data between the frame (20) and the vessel (10).

12. A marine vessel (10) comprising the marine survey system (100) according to any of the preceding claims.

13. The marine vessel (10) according to claim 12, wherein one or more towing cables (12) are attached to the frame (20) for towing the frame (20) at a distance (Xf) behind the vessel (10), wherein the distance (Xf) between the frame (20) and the vessel (10) is set to avoid a region of turbulence (T) in the water (T) caused by the vessel (10).

14. A marine survey method for ultrahigh resolution (UHR) mapping of a marine bottom (B) below a body of water (W) by means of a frame (20) towed as a unit by one or more towing cables (12) at a distance (Xf) behind a marine vessel (10) moving over the water (W) in a first direction (V), the frame (20) comprising a rigid framework (23) and a plurality of independent acoustic sources (21), wherein each acoustic source (21) is independently controlled to emit a separate acoustic wave (A) propagating through the water (W) and reflecting off bottom regions at or inside the marine bottom (B) for the mapping thereof, wherein the acoustic sources (21) are kept fixated by the rigid framework (23) at a source-to-source distance (Ys) less than four meters in a transverse direction (Y) perpendicular to the movement direction (V) of the vessel (10) to distinguish the bottom regions with an ultrahigh resolution (Ry) of less than two meters at least in the

transverse direction (Y).

15. A machine readable medium storing software instructions that when executed by a controller (50) of a marine survey system (100) cause the execution of the marine survey method according to claim 14.