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Three-dimensional positioning sonar

A three-dimensional localization sound and three-dimensional positioning technology, applied in radio wave measurement systems, instruments, etc., can solve the problem of expensive equipment, reduce flow noise, ensure working characteristics, and reduce interference.

Inactive Publication Date: 2012-03-21
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defect that the existing equipment is too expensive, thereby providing a three-dimensional positioning sonar with low price and high practicability

Method used

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] Before explaining the three-dimensional positioning sonar of the present invention, a method for estimating the position of the towed array element by using the three-dimensional positioning sonar of the present invention is firstly described, so as to facilitate the understanding of the application background of the three-dimensional positioning sonar. In this method, three groups of coded pulse trains satisfying the orthogonal condition are respectively sent through the transmitting transducers located at the three ends of the inverted T-shaped array, and then the receiver installed on the long towed linear array obtains the direct pulse train. Finally, using the space-time orthogonality of the inverted T-shaped array and the orthogonal coding signal, the high-precision time delay estimation of the direct wave signal is carried out, so ...

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Abstract

The invention provides three-dimensional positioning sonar, which comprises a towed body, sonar, a towed-body support frame and towed-body hanging plates, wherein the towed body comprises two towed bodies; the top end of each towed body is provided with one towed-body hanging plate; the two towed bodies are placed in parallel in the same direction; the towed-body hanging plates on the two towed bodies are connected through the towed-body support frame to realize the connection of the towed bodies; a position exactly in the middle of the towed-body support frame comprises a long rod; the tail parts of the towed bodies and the top end of the long rod are provided with three sonar instruments respectively; the sonar instruments are in the same vertical plane; and the sonar instrument arranged on the top end of the long rod has equal distance from the two sonar instruments arranged on the tail parts of the towed bodies. As the three-dimensional positioning sonar uses the towed body in a dual-body structure to bear towed-array positioning sonar, and bears on sonar instrument between the two towed bodies through a support so as to form three-dimensional stereo sonar, the three-dimensional positioning sonar can be used for the three-dimensional positioning of towed arrays.

Description

technical field [0001] The invention relates to the technical field of marine detection, in particular to a three-dimensional positioning sonar. Background technique [0002] Sonar is the most important equipment in marine exploration, and the long towed line array equipped with sonar is an important equipment for long-distance target detection. exist figure 1 The working principle of the long towed line array is described in , in which the tugboat drags the long towed line array through the optical cable, and the signal received by the long towed line array is transmitted to the tugboat through the optical cable for further processing. In the specific processing of long towed line array signals, the position estimation of towed line array elements is a key issue. [0003] In order to ensure the detection performance of the sonar, it is necessary to calibrate the position of the sonar elements in the long towed line array. The corresponding calibration equipment in the pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/521G01S7/52
Inventor 黄勇刘纪元叶青
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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