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Unknown wave velocity earth surface source positioning method based on broadband focusing beam forming

A technology of source location and broadband focusing, applied in the field of digital signals, can solve problems such as dependence and inaccurate positioning, and achieve the effect of reducing the cost of communication reading and writing

Pending Publication Date: 2022-04-15
PENG CHENG LAB
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Problems solved by technology

[0005] The main purpose of the present invention is to provide a method, system, terminal and computer-readable storage medium for locating ground seismic sources with unknown wave velocity based on broadband focused beamforming, aiming at solving the need to rely on surface waves for locating ground seismic sources in the prior art. Prior knowledge of speed, and the problem of inaccurate positioning

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  • Unknown wave velocity earth surface source positioning method based on broadband focusing beam forming
  • Unknown wave velocity earth surface source positioning method based on broadband focusing beam forming
  • Unknown wave velocity earth surface source positioning method based on broadband focusing beam forming

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Embodiment Construction

[0072] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0073] The unknown wave velocity surface seismic source location method based on broadband focused beamforming described in the preferred embodiment of the present invention, such as figure 1 and figure 2 As shown, the unknown wave velocity surface source localization method based on broadband focused beamforming comprises the following steps:

[0074] Step S10, collect the received signals of all the sensors in the array, and construct a time-domain data matrix.

[0075] Specifically, the array is formed by a plurality of vibration sensors arranged according to certain spatial rules,...

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Abstract

The invention discloses an unknown wave velocity surface seismic source positioning method based on broadband focusing beam forming, which can realize accurate positioning of a ground seismic source without depending on surface wave velocity priori knowledge, and can give an estimated value of the surface wave velocity at the same time. The frequency domain data matrix is calculated based on the FFT algorithm, the effective frequency domain sub-band range is calculated, and the frequency domain data matrix is intercepted, so that the signal-to-noise ratio of the received signal is improved to a great extent, the influence of noise on the target positioning precision is effectively reduced, the final positioning performance is improved, and the positioning accuracy is improved. The calculated output power of the beam former contains the power of all the frequency components of the seismic surface wave signal, and the processing gain of the system is improved to a great extent, so that the target positioning precision and the target detection distance can be improved.

Description

technical field [0001] The present invention relates to the technical field of digital signals, in particular to a method, system, terminal and computer-readable storage medium for locating seismic source of unknown wave velocity on the ground surface based on broadband focused beamforming. Background technique [0002] Typical passive positioning methods include triangulation positioning (also known as multi-platform positioning technology), which uses two arrays separated by a certain distance to measure the azimuth of the same target, and then estimates the distance of the target according to the triangular relationship. Triangulation is simple and straightforward, but it is very sensitive to azimuth accuracy, resulting in poor ranging accuracy and robustness. [0003] The positioning method based on time delay estimation is also a relatively common passive positioning method. Its basic principle is to arrange three equally spaced array elements (or sub-arrays) on a strai...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/30G01V1/28G01S5/00
Inventor 姜明闫文东胡呈祖王珍珍
Owner PENG CHENG LAB
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