Unlock instant, AI-driven research and patent intelligence for your innovation.

Acoustic vector uniform linear array-based high-subsonic-speed flight target acoustic signal estimation method

A uniform linear array, flying target technology, applied in direction finders using ultrasonic/sonic/infrasonic waves, systems for determining direction or offset, complex mathematical operations, etc., can solve problems such as difficulty in acoustic tracking, and reduce calculation Complexity, improve real-time performance, and expand the effect of application scope

Pending Publication Date: 2022-03-18
中国人民解放军91550部队
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the acoustic signal of a high subsonic flying target presents broadband, transient and non-stationary characteristics, which makes it difficult to perform acoustic tracking, the present invention discloses a method for estimating the acoustic signal of a high subsonic flying target based on an acoustic vector uniform line array , which uses an acoustic vector sensor array composed of multiple acoustic vector sensors uniformly distributed in space to realize

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Acoustic vector uniform linear array-based high-subsonic-speed flight target acoustic signal estimation method
  • Acoustic vector uniform linear array-based high-subsonic-speed flight target acoustic signal estimation method
  • Acoustic vector uniform linear array-based high-subsonic-speed flight target acoustic signal estimation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.

[0040] The invention discloses a method for estimating the acoustic signal of a high subsonic flying target based on a uniform linear array of acoustic vectors, which is realized by using an acoustic vector sensor array located on a spatial cross array with a uniform linear distribution in space, and using the array of the spatial cross array The baseline establishes a three-dimensional rectangular coordinate system. The reference sensor in the acoustic vector sensor array is located at the coordinate origin of the three-dimensional rectangular coordinate system. The acoustic vector sensors are evenly distributed on the positive and negative half axes of the x-axis, y-axis and z-axis. The distance between them, that is, the baseline length is d.

[0041] For K far-field sound sources, take The incident di...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the field of acoustic measurement, in particular to a high-subsonic-speed flight target acoustic signal estimation method based on an acoustic vector uniform linear array. According to the method, the time domain broadband signal expression of the uniform linear space sound cross sound vector array is constructed, and the PCA-BP-based time domain broadband DOA rapid estimation method is adopted, so that the calculation complexity of the system is effectively reduced, and the real-time performance of high subsonic speed flight target estimation is improved. According to the method, the broadband receiving model is constructed in the time domain, so that the application range of the DOA estimation method based on the artificial neural network is effectively expanded, and a technical basis is provided for effectively realizing acoustic detection of a high-subsonic-speed flight target.

Description

technical field [0001] The invention relates to the field of acoustic measurement, in particular to a method for estimating an acoustic signal of a high subsonic flying target based on an acoustic vector uniform line array. Background technique [0002] At present, restricted by the height of the sea surface platform, the over-the-horizon detection of low-altitude flying targets on the sea surface is a difficulty in conventional radar detection technology. At the same time, the complex electromagnetic environment near the sea surface platform will lead to an increase in the electromagnetic background noise. The sea surface platform radar is in a low elevation angle mode when detecting the sea, which will have adverse factors such as serious sea clutter and multipath effects. The above unfavorable factors lead to certain difficulties in radar detection of short-range low-altitude flying targets on the sea. [0003] In recent years, the detection and localization technology b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01S3/802G06F17/14G06F17/16
CPCG01S3/802G06F17/14G06F17/16
Inventor 陈昭男阎肖鹏孙贵新邵翔宇
Owner 中国人民解放军91550部队