System and method for passively positioning underwater target

An underwater target, passive positioning technology, applied in radio wave measurement system, sound wave re-radiation, utilization of re-radiation and other directions, can solve problems such as poor accuracy and complex calculation

Inactive Publication Date: 2009-07-01
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the defects of complex calculation and poor precision in existing underwater ta...

Method used

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  • System and method for passively positioning underwater target
  • System and method for passively positioning underwater target
  • System and method for passively positioning underwater target

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Embodiment Construction

[0033] A system and method for passive positioning of an underwater target provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] figure 1 It is a schematic diagram of an underwater target passive positioning system based on an acoustic sensor network according to an embodiment of the present invention. Use underwater acoustic sensor equipment to form a static underwater acoustic wireless sensor monitoring network. As shown in the figure, the system includes underwater sensor equipment 1, buoy (gateway) equipment 2 on the water surface, wireless communication network and a shore-based center Processing equipment3. The underwater sensor device 1 communicates with the buoy device 2 wirelessly through an underwater acoustic carrier, or communicates with the buoy device 2 using a cable to realize data transmission between the two. The buoy device 2 can communicate with the underwater se...

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Abstract

The invention discloses a system for passively positioning underwater targets and a method, wherein an underwater sensor device collects the noise signal of an underwater target, obtains and transmits the energy information of the noise signals; a buoy device is communicated with the sensor device for transferring the energy information to a center processing device; the buoy device is used as the anchor point of the system; the center processing device is communicated with the buoy device for obtaining the direction of the underwater target based on maximum likelihood method according the received energy information and the information of the anchor point. The invention can be used to position underground sounding bodies such as underground vehicles, whales and underground explosive sound source, to complete target detection in underground condition.

Description

technical field [0001] The present invention relates to the technical field of sonar signal processing, and more particularly, the present invention relates to a system and method for passive positioning of underwater targets. Background technique [0002] Passive positioning of underwater targets is an important research topic of sonar signal processing. It uses the signal radiated by the target itself to estimate the target's azimuth. The positioning system does not need to send out any signals, so it has strong concealment. The traditional underwater target passive positioning system is based on the hydrophone array, and the passive positioning of the target is completed according to a certain distribution characteristic of the relevant signal received by the measurement unit in space or time, and the array signal processing method is adopted, such as the delay of arrival The difference (TDOA) and the estimation of the orientation (DOA) are estimated to obtain the distanc...

Claims

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Application Information

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IPC IPC(8): G01S7/52G01S15/06
Inventor 王彪李宇黄海宁
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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