Compensating method with associated movement of synthetic aperture sonar and system

A synthetic aperture sonar and joint motion technology, applied in radio wave measurement systems, sound wave re-radiation, and utilization of re-radiation, etc., can solve problems such as poor compensation accuracy, improve motion compensation accuracy, and facilitate real-time system application and calculation. Simple and convenient process

Inactive Publication Date: 2009-10-07
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

[0006] In order to overcome the defect of poor motion compensation accuracy of existing synthetic aperture

Method used

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  • Compensating method with associated movement of synthetic aperture sonar and system
  • Compensating method with associated movement of synthetic aperture sonar and system
  • Compensating method with associated movement of synthetic aperture sonar and system

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Embodiment Construction

[0052] A synthetic aperture sonar joint motion compensation method and system provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] The invention proposes a multi-sensor based synthetic aperture sonar motion compensation method, which is used to estimate and compensate the error caused by the motion of the sonar base array, and improve the imaging quality of the synthetic aperture sonar. The sensor mentioned here is generalized, and the sonar array itself can also be regarded as a sensor, and the echo data received by the sonar array can also be used as an information source for motion compensation. From the perspective of implementation, the synthetic aperture sonar motion compensation can be divided into motion error estimation and motion error compensation, wherein the motion error estimation is the key of the method of the present invention. The specific implementation of the metho...

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Abstract

The invention provides a compensating method with associated movement of synthetic aperture sonar and a system. According to the requirements of a basic matrix carrier of the synthetic aperture sonar and movement compensation accuracy, the configuration of the invention comprises a synthetic aperture sonar multi-collection submatrix and a system of a required sensor. The position of an adjoint matrix coordinate system original point is estimated through information obtained by the sensor, and central positions of each equivalent phase on the sonar basic matrix are determined according to the movement of the adjoint matrix coordinate system original point so as to obtain the movement errors of each current equivalent phase on the sonar basic matrix. Various sensor data capable of being deployed is fully utilized to improve the movement compensation accuracy. A movement compensation calculating process has simplicity and convenience and is convenient for real time system application.

Description

technical field [0001] The present invention relates to the technical field of sonar signal processing, and more specifically, the present invention relates to a synthetic aperture sonar joint motion compensation method and system. Background technique [0002] Synthetic Aperture Sonar (SAS) uses the movement of the small aperture matrix in the azimuth direction to obtain high-resolution sonar images by coherently processing the sonar echo signals at different spatial positions. [0003] The carrier of the synthetic aperture sonar array is generally an unpowered drag body or other underwater vehicles (such as underwater robots, etc.). The unpowered tow body is towed by the ship, and the tow body and the mother ship are connected by tow cables. Affected by the force in the water (such as water flow) and the stability of the ship's own maneuvering, it is difficult for the tow body to maintain an ideal straight track. Even if the sonar array is installed on the underwater robo...

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Application Information

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IPC IPC(8): G01S7/52G01S15/89
CPCG01S15/8904G01S7/52004
Inventor 刘维刘纪元张春华
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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