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A Target Location Method Based on Streamer Shape Equation Analysis

A target positioning and shape technology, applied in the direction of sound wave re-radiation, instruments, measuring devices, etc., can solve the problems of high hardware cost and limited promotion, and achieve the effect of small calculation amount, good algorithm tolerance, and small numerical operation error

Active Publication Date: 2020-09-15
THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP +1
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  • Claims
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AI Technical Summary

Problems solved by technology

However, it is necessary to increase the space and hardware configuration on the towed body. At the same time, install the transmitting and receiving acoustic array on the mother ship, and support the high-precision ship-borne attitude measurement equipment to calibrate the installation angle of the fixed error and measure the real-time azimuth angle. The disadvantage is the replacement of the ship. It will require re-measurement of the system installation error, the hardware cost is high, and the promotion is limited when the configuration conditions are tight and the working environment is limited.

Method used

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  • A Target Location Method Based on Streamer Shape Equation Analysis
  • A Target Location Method Based on Streamer Shape Equation Analysis
  • A Target Location Method Based on Streamer Shape Equation Analysis

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with accompanying drawing:

[0020] In order to meet the high-precision positioning and engineering adaptability requirements of the towed image sonar target in the shallow sea environment, the present invention proposes a target positioning method based on streamer shape equation analysis. This method establishes a typical steady-state towing model of the soft tow cable in shallow sea environment, and obtains the relationship between the oblique distance value of the tow cable and the length of the tow cable, the depth of the tow body, and the longitudinal angle by solving the shape equations of the tow cable for the first time. To determine the analytical range of the towline deformation constraint, obtain the oblique distance value of the towline under different towline deformation conditions, combine the real-time position information of the hull, heading angle, and pitch and roll attitude compens...

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Abstract

The invention proposes a target positioning method based on hydrophone streamer shape equation analysis. The target positioning method establishes a water typical steady-state dragging model of a softstreamer in a shallow sea environment, solves and obtains the equivalent conversion relationships between a hydrophone streamer slant distance value and the hydrophone streamer length and between thetowed body depth and a longitudinal working angle by analyzing a hydrophone streamer shape equation set, determines a hydrophone streamer deformation constraint analytical range, obtains the hydrophone streamer slant distance values in different hydrophone streamer deformation conditions, and acquires a high-precision positioning information of a target according to real-time positioning information of a ship, the heading angle, and the inter-beam vertical and horizontal attitude compensation. The method effectively improves the target positioning ability of a towed imaging sonar in a marineapplication task.

Description

technical field [0001] The invention belongs to the technical field of towed image sonar target positioning, and mainly relates to a target positioning method based on the analysis of the form equation of the towed cable. Background technique [0002] During the working process, the towed imaging sonar can output real-time seabed terrain imaging or small target detection imaging results. For the discovery of key suspicious targets, it is necessary to complete rapid and accurate positioning and emergency treatment at the same time. For the towed imaging sonar, the accurate positioning of the towed body must be realized before the output of the positioning information of the detection target can be further completed. When the towing body is towed in the water, the towing cable will be bent up and down and shifted left and right due to the towline being subjected to its own gravity, countercurrent, flow measurement, cable laying length and towing speed in sea water, which will ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S15/89
CPCG01S15/89
Inventor 朱必波薛欢欢蒋晗磊傅翔毅刘竞扬曾祥瑞
Owner THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP
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