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Ultra-short baseline vertical motion object measuring method

A technology for vertical movement and target measurement, which is applied in radio wave measurement systems, measurement devices, image data processing, etc. It can solve problems such as difficult to overcome the influence of high-speed movement, and achieve distance ambiguity, high data refresh rate, and high-precision positioning performance effect

Inactive Publication Date: 2013-03-06
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Conventional ultra-short baseline positioning system is difficult to overcome the impact of high-speed motion

Method used

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  • Ultra-short baseline vertical motion object measuring method
  • Ultra-short baseline vertical motion object measuring method
  • Ultra-short baseline vertical motion object measuring method

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Experimental program
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Embodiment Construction

[0015] The present invention is described in more detail below in conjunction with accompanying drawing example:

[0016] combine Figure 1~4 , The ultra-short baseline vertical moving target measurement system adopts the working mode of the synchronous beacon, and the system and the acoustic beacon adopt the synchronous clock alignment. After the system works as figure 1 As shown, the system collects signal data and performs filtering processing through a band-pass filter. The system uses broadband signals to perform copy correlation, envelope extraction, and search for positioning signals larger than the threshold.

[0017] When the positioning signal is detected, the pulse pair information at the corresponding position is extracted, and Doppler estimation and compensation are performed to overcome the influence of the high-speed movement of the target.

[0018] Correlation operation is performed between the compensated received signal and the reference signal, the maximu...

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Abstract

The invention is aimed at providing an ultra-short baseline vertical motion object measuring method. The method comprises the following steps: employing a synchronization clock to align a system with an acoustic marker, collecting signal data, carrying out filtering processing through a band pass filter, by utilizing a broadband signal to carry out copy correlation, envelope extraction, search of a positioning signal greater than a threshold by the system; when detecting a positioning signal, extracting pulse pair information, carrying out Doppler estimation and compensation; carrying out copy correlation on a reception signal and a reference signal which go through Doppler estimation and compensation, searching a correlation peak maximum value, and calculating time delay information of each signal; resolving array coordinate of a object, according to stored GPS and attitude meter data, resolving a geodetic coordinate of the object, obtaining final object movement track data, carrying out track fitting on a positioning result, carrying out displacement difference processing to obtain object motion speed and obtain an object motion gliding angle. The ultra-short baseline vertical motion object measuring method has high precision positioning performance and positioning capability of a high speed moving object.

Description

technical field [0001] The invention relates to an underwater sonar device. Background technique [0002] The trajectory of underwater target is an important reference information for analyzing and researching target control performance. However, due to the relatively high moving speed of the target and the short moving time, in order to obtain high-precision trajectory information, it is necessary to overcome the Doppler effect introduced by high speed, the mutual interference between multiple targets, and obtain positioning data with a high refresh rate. This greatly increases the requirements for the measurement system. Conventional ultra-short baseline positioning systems are difficult to overcome the impact of high-speed motion. It is an urgent need to develop a measurement system for high-precision positioning of high-speed targets. Contents of the invention [0003] The purpose of the present invention is to provide an ultra-short baseline vertical moving target ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/00G06T7/00G01S15/58
Inventor 孙大军郑翠娥张殿伦李想勇俊卢逢春
Owner HARBIN ENG UNIV