Stable super directivity wave beam forming method for multiple coaxial circular ring array
A super-directional beam and coaxial circle technology, which is applied in the field of acoustic array testing, can solve the problems of low spatial resolution accuracy of sound sources in the measurement of acoustic arrays, poor robustness of false sound source suppression beams, and strong blindness in the beamforming process. , to achieve the effects of improving universality and applicability, ensuring robustness, and increasing the speed of super-directional beamforming
Active Publication Date: 2017-06-30
QINGDAO TECHNOLOGICAL UNIVERSITY
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Problems solved by technology
[0011] In order to overcome the deficiencies of the prior art, the present invention provides a multi-ring coaxial circular array robust super-directional beamforming method, which solves the problems of low spatial resolution of sound sources, suppression of false sound sources and Problems such as poor beam robustness, strong blindness in the beamforming process, low efficiency and poor economy
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[0057]It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
[0058] It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.
[0059] As introduced in the background technology, there are some deficiencies in the prior art, such as low spatial resolution accuracy ...
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The invention discloses a stable super directivity wave beam forming method for a multiple coaxial circular ring array. The method can help solve a problem that a conventional sound measurement array is low in sound source space resolution precision, low in fake sound source suppression performance and wave beam robustness, strong in blindness of wave beam forming processes and low in efficiency and economical efficiency; the beneficial effects of the method disclosed in the invention are that output signal-to-noise ratio of arrays can be improved, robustness of super directivity wave beams can be ensured, and accurate individual control of structure and performance optimization conditions can be realized; the method comprises the following steps: a multiple coaxial circular ring array is used as a basic acoustic array, the number of rings and the number of array elements on the rings of the basic sound array are determined, an array element signal to noise ratio weighting mode in the acoustic array is arranged, and a super directivity wave beam model for the acoustic array is built.
Description
technical field [0001] The invention relates to the technical field of acoustic array testing, in particular to a multi-ring coaxial circular array robust super-directional beamforming method. Background technique [0002] Acoustic array beamforming technology is a common method for identifying motion noise sources. Because it is suitable for far-field and medium-high frequency noise measurement, it is widely used in noise testing of aircraft, trains, automobiles and other vehicles. The beam width of the acoustic array characterizes the resolution ability of the array to identify sound sources. The wider the beam width, the worse the recognition ability of the array, that is, the worse the ability of the array to distinguish adjacent sound sources; the maximum main lobe and the maximum side lobe of the array beam The ratio of the lobe amplitude or the size of the maximum side lobe level indicates the ability of the array to suppress interference or noise, that is, the abilit...
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IPC IPC(8): G10K11/26
CPCG10K11/26
Inventor 刘志红李燕超仪垂杰王万凯王文明
Owner QINGDAO TECHNOLOGICAL UNIVERSITY