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

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...

AI Technical Summary

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.

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