Large aperture three-dimensional array structure

Abstract

The invention relates to a large aperture three-dimensional array structure, which comprises a center support platform and a plurality of round rods (11), wherein the round rods (11) and the center support platform are fixedly assembled, the center support platform comprises a camera base (7), a front end plate (6), a cylinder (4) and a platform installation base (1), which are sleeved coaxially sequentially, the cylinder (4) is connected to the platform installation base (1) through a pin at the front end, the other end of the cylinder (4) is in cup joint with the front end plate (6), the camera base (7) is sleeved on the front end plate (6); array bases (10) are arranged on each round rod (11), and each round rod (11) is arranged on the platform installation base (1) through a round rod connecting piece (2) and a round rod support piece (3) on the platform installation base (1), and maintains a certain angle with the center line of the center support platform. The structure has a simple structure, the array aperture is increased, the measuring frequency lower limit is expanded, and improvement of the detection positioning precision is facilitated.

Description

Technical field [0001] The present invention relates to the field of acoustic measurement, in particular, the present invention relates to a large-aperture stereo array structure. Background technique [0002] The array structure refers to an acoustic detection device that combines multiple microphones according to a certain plane or three-dimensional geometric shape. The device arranges a number of acoustic detection units according to a certain rule to receive the acoustic signals of the sound field. The sound source is located synchronously to determine the spatial information of the sound field, and can enhance the desired signal and suppress background noise and interference sources, improve the positioning accuracy of the sound source and the suppression of irrelevant signals, and can be used to measure the distribution of the sound source or the sound field , Determine the position of the sound source, and track the moving sound source. The device can be used in the field ...

AI Technical Summary

Problems solved by technology

[0005] The existing large-aperture three-dimensional array adopts the form of 3 long rods or 5 long rods, such as the German Acoustic Camera star array adopts the form of 3 long rods, with a total of 36 array elements, and each long rod cannot be disassembled and folded for installation , therefore, the aperture size of the array element, the number of rods and array elements will be limited; the distribution of the array elements on each rod is exactly the same; the signal lines of each rod are brought together and exposed outside, which is easy to be damaged

The star array of Danish B&K company adopts the form of 5 rods, and the array elements on each rod are distributed according to the same law, and a single rod cannot be disassembled or folded for installation

Therefore, the single rod of the currently popularized three-dimensional array cannot be disassembled or folded, resulting in a large three-dimensional array, causing inconvenience in use, installation and transportation, and resulting in the need to consider the size of the array and the use, transportation, portability, There are some compromises in terms of stability, which limit the large aperture advantage of the stereo array

In addition, in terms of installation, the existing three-dimensional array structure is composed of long rods and directly installed on the bracket. It is mainly used for target noise measurement at the angle of looking up. In the case of looking up or looking down, there will be an imbalance of the center of gravity, which will cause the installation unstable

[0006] Therefore, the aperture of the array is small, the transportation and installation are unchanged, and the distribution of array elements on each rod is consistent, resulting in the performance of the array not reaching the best

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