Offshore work platform personnel positioning method based on wavelet decomposition low frequency coefficient

A technology of wavelet decomposition and operation platform, which is applied in the field of wireless positioning and ranging, can solve the problems of not less than 3, and achieve the effect of high-precision positioning and ranging accuracy

Inactive Publication Date: 2017-07-18
SINOPEC SHENGLI OILFIELD +1
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Problems solved by technology

If three-dimensional positioning is to be realized, the number of base stations should not be less than 4; if two-dimensional positioning is to be realized, the number of base stations should not be less than three

Method used

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  • Offshore work platform personnel positioning method based on wavelet decomposition low frequency coefficient
  • Offshore work platform personnel positioning method based on wavelet decomposition low frequency coefficient
  • Offshore work platform personnel positioning method based on wavelet decomposition low frequency coefficient

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Embodiment Construction

[0041] Embodiments of the present invention will be described below in conjunction with the accompanying drawings. The channel selected in the embodiment is the CM1 channel and the CM2 channel of the IEEE802.15.4a standard, and the main implementation steps are as follows: figure 1 shown, including:

[0042] A. UWB signal transmission: The positioning tag installed on the working platform staff sends a UWB signal, and the positioning base station receives the signal; the UWB signal adopts a second-order Gaussian pulse, the modulation method is PPM-TH-UWB, and the sampling frequency is 50GHz .

[0043] B. UWB signal wavelet decomposition: The positioning base station performs wavelet decomposition on the received UWB signal. The calculation method is:

[0044]

[0045] Among them, c 0 Represents the received UWB signal, j∈{0,1} represents the number of layers of wavelet decomposition, in this example, two-layer wavelet decomposition is performed on the received UWB signal...

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Abstract

The invention belongs to the offshore work platform personnel positioning field, and specifically relates to an offshore work platform personnel positioning method based on a wavelet decomposition low frequency coefficient; the method mainly comprises 6 steps: A, allowing a positioning label arranged on the oil zone work personnel to send a UWB signal, and allowing a positioning base station to receive the signal; B, allowing the positioning base station to carry out wavelet decomposition for the received UWB signal; C, extracting low frequency coefficients after wavelet decomposition to build an energy block; D, building a mapping relation between the threshold and the energy block kurtosis; E, carrying out actual range finding according to the received UWB signal; F, allowing a server to position the personnel according to the differences between the positioning label and different positioning base stations and a hyperbola algorithm. The method firstly applies the UWB signal, wavelet decomposition and wavelet decomposition low frequency coefficient constructed energy block to the offshore work platform personnel positioning, thus improving the personnel range finding positioning precision under offshore oil zone specific working conditions like multipath, non-LOS and multi-metal environments.

Description

technical field [0001] The invention belongs to the technical field of wireless positioning and ranging, in particular to an ultra-wideband wireless positioning technology, in particular to a personnel positioning method for an offshore operation platform based on wavelet decomposition low-frequency coefficients. Background technique [0002] With the rapid development of our country's national economy, the energy problem has become more and more prominent. At the same time, due to the depletion of my country's onshore oil resources, offshore oil development has become a strategic focus of energy development. However, the offshore production environment is affected by external factors such as weather and waves, and is prone to sudden and catastrophic weather. In case of people falling into the water, a large amount of manpower and material resources need to be invested in a pull-net search, and the search and rescue process and efficiency are affected by the weather. , ocean...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02
CPCG01S5/02
Inventor 李冰崔学荣何锋李娟李忠伟张卫山
Owner SINOPEC SHENGLI OILFIELD
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