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Ultra short base line underwater target positioning method based on broadband signal time delay detection

An underwater target and ultra-short baseline technology, which is applied to the ultra-short baseline positioning of underwater targets and parameter underwater acoustic telemetry, and the field of ultra-short baseline underwater target positioning. Problems such as difficulty in calibration and calibration, etc., achieve the effect of reducing processing difficulty and simplifying design

Active Publication Date: 2014-05-07
750 TEST SITE OF CHINA SHIPBUILDING IND CORP +2
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Problems solved by technology

However, when phase detection is used, the size of the array is limited by the ambiguity of phase measurement, and an improved multi-element ultra-short baseline array needs to be designed.
However, the processing and calibration of the short baseline array is difficult, and it is quite difficult to realize. In addition, due to the multi-path effect, the phase fluctuation of the single-frequency signal will directly affect the positioning accuracy.

Method used

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  • Ultra short base line underwater target positioning method based on broadband signal time delay detection
  • Ultra short base line underwater target positioning method based on broadband signal time delay detection
  • Ultra short base line underwater target positioning method based on broadband signal time delay detection

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Embodiment Construction

[0042] The system of the invention adopts the response mode to locate the target. The platform (or ship-borne) equipment transmits an inquiry signal, and the transponder arranged on the underwater target responds accordingly. The platform (or ship-borne) equipment receives the response signal and calculates the position of the underwater transponder. In addition, the system also has target information Telemetry and remote control functions.

[0043] The ultra-short baseline array form of the present invention is as figure 1 As shown, the receiving units 1 to 4 are uniformly distributed and are used to receive response signals, and the middle is the transmitting unit, which is used to transmit inquiry signals.

[0044] The interrogation signal is in the form of positive and negative linear frequency modulation (LFM) combined pulses, and the signal system is as follows: figure 2 shown. Interrogation of Target 1 when the positive LFM pulse precedes the negative LFM pulse; whe...

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Abstract

The invention relates to an ultra short base line underwater target positioning method based on broadband signal time delay detection, which is particular applicable to ultra short base line positioning and parameter underwater sound remote telemetering of an underwater target, for example, a transponder, and belongs to the technical field of underwater target positioning. The characteristic is that the target positioning method adopts an answer mode to carry out target positioning, a platform or an onboard device transmits an inquiring signal at first, a transponder arranged on an underwater target answers correspondingly, the platform or the onboard device receives an answering signal and solves the position of the transponder underwater. According to the method, a spread spectrum technology is adopted to design the inquiring signal and the answering signal, and high-precision positioning of the underwater target (the transponder) is realized. In addition, ultra short base line underwater target positioning method also has functions of telemetering information such as the depth, the attitude of the transponder, the water temperature of a place where the transponder is located, battery voltage of the transponder and the like and remotely controlling the sound source level of the transponder.

Description

technical field [0001] The invention relates to an ultra-short baseline underwater target positioning method based on wideband signal time delay detection, and is particularly suitable for ultra-short baseline positioning of underwater targets (transponders) and underwater acoustic remote measurement of parameters. The invention belongs to the technical field of underwater target positioning. Background technique [0002] Ultra-short baseline (USBL) is an underwater positioning technology. The ultra-short baseline underwater target positioning system is easy to install due to its small array size, and the equipment cost is relatively low, so it is very convenient to use. Engineering and marine are currently widely used in marine production and development such as offshore oil exploration and development, marine salvage and so on. [0003] The traditional ultra-short baseline positioning mentioned above adopts the phase detection method. When working, the transmitting trans...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/24
CPCG01S5/20G01S5/22G01S15/74
Inventor 王健培窦如宽程宏陈克朱学峰
Owner 750 TEST SITE OF CHINA SHIPBUILDING IND CORP
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