Microphone array support arm mounting device

Abstract

The utility model discloses a microphone array support arm mounting device, which is used for realizing convenient carrying of a microphone array through disassembly and assembly of an array support arm in a sound source positioning test, and meanwhile, the microphone array suitable for positioning different noise sources can be constructed by utilizing disassembly and replacement of the array support arm when facing different noise sources. The array manufacturing cost is reduced, and the portable performance of the array is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a microphone array support arm mounting device and belongs to the technical field of acoustic test and acoustic detection. BACKGROUND

[0002] The sound source positioning technology based on a microphone array refers to obtaining the position of a target sound source by using a correlation algorithm to process the phase difference and amplitude difference between the acoustic signals collected by the microphone array, and the sound source positioning technology is widely used in military, industrial and civil fields. As a key part of the sound source positioning system, the distribution of the array shape is a key factor affecting the sound source positioning result and the sound source positioning performance, and the number of array elements, the array aperture and the array element distribution all have a great influence on the performance of sound source positioning.

[0003] However, different sound sources have different characteristics, and the frequency bands for sound source positioning are also different, so the design parameters of the array need to be changed when the characteristics of the sound source change greatly, which means that one microphone array cannot meet all sound source positioning needs. If the characteristics of the target sound source change, a new microphone array needs to be created, and to achieve good sound source positioning in multiple frequency bands, a large amount of cost needs to be spent on the production of the microphone array. In addition, when the main noise frequency of the target sound source is low, a larger array aperture of the microphone array is needed, which means that the overall size of the array is larger, which is not convenient for storage and carrying.

[0004] At present, most of the two-dimensional microphone array configurations with good positioning effect are multi-arm spiral arrays, and the detachable and replaceable multi-arm spiral array support arms can not only improve the portability of the microphone array, but also reduce the production cost of the microphone array by replacing the support arm shape, which has high practical value. However, there are the following problems, first, when the array aperture of the microphone array is large, the overall size is not convenient for carrying, and the installation of the microphone is also difficult. Second, the production cost of the complete microphone array is high, especially for the array with a large array aperture. Utility model content

[0005] The technical problem solved by the utility model is to overcome the shortcomings of the prior art, and a microphone array support arm mounting device is provided, which realizes array construction by quickly installing the support arms of a two-dimensional multi-arm array, and has the advantages of reducing the array production cost and improving the convenient carrying performance of the array.

[0006] The technical solution of the utility model is:

[0007] A microphone array support arm mounting device, comprising an array disc (1), an array support arm (2), a locking buckle (3), a spring (4) and a screw handle (5);

[0008] The array disc (1) is discoid, and the side edge curved surface of the array disc (1) is provided with a cuboid hole A in the radial direction; the side edge of the cuboid hole A in the same direction as the central axis of the array disc (1) is provided with a cuboid hole B, and the cuboid hole B is provided with a through hole C on the inner side of the side edge away from the cuboid hole A;

[0009] The locking buckle (3) is located in the cuboid hole B and is close to the side of the cuboid hole A;

[0010] The screw handle (5) passes through the through hole C and is connected with the locking buckle (3);

[0011] One end of the spring (4) is connected with the locking buckle (3), and the other end is connected with the side of the cuboid hole B away from the cuboid hole A;

[0012] The array support arm (2) comprises an array section (21) and a mounting section (22), the mounting section (22) is provided with a cuboid hole D on the side, the mounting section (22) is inserted into the cuboid hole A of the array disc (1), and the array disc (1) is fixed together through the locking buckle (3).

[0013] Further, the mounting section (22) of the array support arm (2) is consistent with the shape of the cuboid hole A, so that the array support arm is completely fitted and mounted into the array disc.

[0014] Further, the cross-sectional length and width of the locking buckle (3) are consistent with the cross-sectional length and width of the cuboid hole B.

[0015] Further, the thickness of the array section (21) of the array support arm (2) is the same as the thickness of the array disc (1).

[0016] Further, the outer diameter of the spring (4) is greater than the width of the through hole C and smaller than the width of the cuboid hole B.

[0017] Further, the length of the spring (4) is greater than the length of the through hole C.

[0018] Further, the locking buckle (3) is provided with a threaded hole on the top surface, and the screw handle (5) is connected with the locking buckle (3) through the threaded hole.

[0019] Further, the surface of the locking buckle (3) outward along the radial direction of the disc and the surface toward the cuboid hole A jointly form a curved surface.

[0020] Further, when the mounting section (22) of the array support arm is inserted into the cuboid hole A of the array disc (1), the locking buckle is pushed to move in the direction of the spring (4) through the curved surface, and when the array support arm is mounted, the locking buckle is re-inserted into the cuboid hole D of the mounting section (22) of the array support arm under the action of the spring, thereby locking the array support arm and the array disc.

[0021] Further, the screw handle (5) is displaced away from the support arm direction under external force, drives the locking buckle (3) to move, and realizes the relaxation of the array support arm.

[0022] The utility model has the advantages that compared with the prior art, the utility model has the advantages that:

[0023] (1) For the problem that the overall microphone array is not convenient to carry and the microphone is difficult to install when the aperture of the microphone array is large, the microphone array support arm mounting device provided by the utility model can improve the portability of the microphone array, is a device for building an array by quickly installing a two-dimensional multi-arm array support arm, and can also quickly disassemble the array support arm to realize the light and portable carrying and storage of the array. By changing the shape of the array support arm, the overall shape of the array can be changed, thereby meeting the positioning needs of different sound sources and being suitable for more scenarios.

[0024] (2) For a complete microphone array, especially an array with a large aperture, the existing manufacturing method is to perform laser cutting on a whole piece of metal, and the array configuration needs to be cut and manufactured again when the array configuration changes. This microphone array manufacturing method consumes a large amount of materials and has a large manufacturing cost. The mounting device provided by the utility model realizes the detachable replacement of the array support arm and the reuse of the array disc, so that when the array shape is changed, the new array configuration can be manufactured only by manufacturing the array support arm, and then the array disc and the array support arm are fixed by the mounting device, thereby greatly saving the material cost required for manufacturing the array, and the single array support arm is easier to process than the whole array.

[0025] (3) The utility model locks the array support arm and the array disc by using the locking buckle, the buckle is locked and relaxed by the spring, and the array support arm can be quickly and conveniently installed and disassembled; meanwhile, the curved surface of the locking buckle reduces the installation resistance of the array support arm.

[0026] (4) When the array is large and the array arm is long, it is difficult to install the microphone, the array support arm and the array disc are designed separately in the utility model, the array arm can be disassembled for microphone installation, and the microphone installation is more convenient. The connection between the array disc and the array center in the utility model is firm, and the stability of array measurement during sound source positioning can be ensured.

[0027] (5) The utility model has a simple structure, can reduce the acoustic signal interference caused by the array structure itself during acoustic testing, and improves the accuracy of microphone acoustic signal acquisition. BRIEF DESCRIPTION OF DRAWINGS

[0028] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to limit the present inventive subject matter thereto. Like reference numerals are used to indicate like components throughout the several views. In the drawings:

[0029] Figure 1 It is an external schematic view of the microphone array support arm mounting device in the embodiment of the present application.

[0030] Figure 2 It is an internal schematic view of the microphone array support arm mounting device in the embodiment of the present application.

[0031] Figure 3 It is a rear view of the microphone array support arm mounting device in the embodiment of the present application.

[0032] Figure 4 It is a sectional view of the array disc of the microphone array support arm mounting device in the embodiment of the present application.

[0033] Figure 5 It is a schematic view of the array support arm of the microphone array support arm mounting device in the embodiment of the present application.

[0034] Figure 6 It is a schematic view of the locking buckle of the microphone array support arm mounting device in the embodiment of the present application.

[0035] Figure 7 It is a schematic view of the screw handle of the microphone array support arm mounting device in the embodiment of the present application. DETAILED DESCRIPTION

[0036] Example embodiments of the present disclosure will be described herein below with reference to the accompanying drawings. While example embodiments of the present disclosure are illustrated in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0037] The microphone array support arm mounting device is mainly used for the assembly of the microphone array in the sound source positioning test, and has the advantages of convenient installation and disassembly of the microphone array support arm and convenient carrying and storage of the microphone array.

[0038] The microphone array support arm mounting device structure is shown in Figures 1-3 The microphone array support arm mounting device structure is shown in

[0039] The array disk 1 is generally disc-shaped, and the multi-arm spiral array is a rotationally symmetric structure. The disc-shaped array disk meets the array design requirements. (Based on the device cross-sectional diagram...) Figure 4 As shown, the side curved surface of the array disk 1 has a cuboid hole A along the radial direction. The shape of the cuboid hole A is consistent with that of the array support arm mounting section 22. The purpose is to ensure that the array support arm 2 can be installed in the array disk 1 in a completely fitting manner, so as to avoid shaking and displacement, which would cause the microphone array coordinates to be inaccurate.

[0040] A cuboid hole A is located on the side of the array disk 1, which is in the same direction as the central axis of the array disk 1. The cuboid hole B is used to place a locking buckle on the side of the connecting section between the array disk 1 and the array support arm 2 to lock the two together.

[0041] Locking latch 3 Figure 6 As shown, the radially outer surface of the disk and the surface facing the cuboid hole A form a curved surface. This is to allow the array arm 2 to automatically compress the spring 4 during installation, retracting the locking buckle 3 inward, thus smoothly placing the mounting section 22 of the array arm 2 into the cuboid hole A. The cross-sectional length and width of the locking buckle 3 are consistent with the cross-sectional length and width of the cuboid hole B. This is to ensure that the movement of the locking buckle 3 inside the cuboid hole B is limited to the axial direction of the cross-section, preventing the array arm from shaking or shifting after locking.

[0042] Spring 4 is placed inside the cuboid hole B, applying an outward force to the locking buckle inside the cuboid hole B, thus locking the buckle. The cuboid hole B has a through hole C extending to the rear side of the array disk 1 along its vertical axis. Screw handle 5 passes through through hole C, providing lateral movement space for screw handle 5. The movement of screw handle 5 moves the buckle, thereby locking and releasing the array arm. The width of through hole C is smaller than the diameter of spring 4 to restrict the direction of spring 4's movement and prevent it from popping out under compression.

[0043] The mounting section 22 of the array arm 2 has a cuboid hole D on its side facing the cuboid hole B, such as... Figure 5 As shown, the hole is to allow the locking latch 3 to extend into the mounting section 22 of the array arm 2, thereby locking the array arm. The thickness of the array section 21 of the array arm 2 is the same as the thickness of the array disk 1, in order to make the array surface flat and reduce interference that may occur when the microphone collects signals.

[0044] This device enables rapid assembly of microphone arrays and convenient installation of microphones during sound source localization testing. During transportation and storage of the microphone array, the array arms can be detached, reducing the overall size of the array and facilitating transport and storage. The working principle of the device is as follows:

[0045] The cuboid hole B inside the array disc 1 is sequentially placed with a spring and a locking buckle from inside to outside, the spring 4 is always in a compressed state, thereby exerting a force on the locking buckle 3 towards the cuboid hole A, the force makes the locking buckle 3 be able to stably extend into the cuboid hole D of the array arm mounting section 22 at any time, thereby ensuring the stable connection of the array arm 2.

[0046] The screw handle 5 is connected with the locking buckle 3 through the through hole C, as shown in the figure, the through hole C has enough length space along the axial direction of the spring 4, so that the screw handle 5 can move along the direction; when the array arm is disassembled, the locking buckle 3 needs to be relaxed, the screw handle 5 is moved to compress the spring 4 to move inwardly, thereby releasing the locking connection between the locking buckle 3 and the array arm mounting section 22, so that the array arm 2 can be taken out. Figure 7

[0047] The surface of the locking buckle 3 along the radial direction of the disc and the surface facing the cuboid hole form a curved surface, when the array arm mounting section 22 extends into the cuboid hole A of the array disc 1, the locking buckle 3 can be directly pushed inwardly through the curved surface, when the array arm is mounted to the bottom, the locking buckle 3 extends into the cuboid hole D of the array arm mounting section 22 under the action of the spring 4, thereby locking the array arm 2 and the array disc 1.

[0048] The above-mentioned embodiments are only the preferred specific embodiments of the present application, the usual changes and replacements made by the person skilled in the art within the technical scheme of the present application should be included in the protection scope of the present application.​

Claims

1. A microphone array boom mounting apparatus, characterized by, It comprises an array disc (1), an array arm (2), a locking buckle (3), a spring (4) and a screw handle (5). The array disc (1) is disc-shaped, and the side edge curved surface of the array disc (1) is provided with a cuboid hole A in the radial direction; the side edge of the cuboid hole A in the same direction as the central axis of the array disc (1) is provided with a cuboid hole B, and the cuboid hole B is provided with a through hole C on the inner side of the side edge away from the cuboid hole A. The locking buckle (3) is located in the cuboid hole B and is close to the side of the cuboid hole A. The screw handle (5) passes through the through hole C and is connected with the locking buckle (3). One end of the spring (4) is connected with the locking buckle (3), and the other end is connected with the side edge of the cuboid hole B away from the cuboid hole A. The array arm (2) comprises an array segment (21) and a mounting segment (22), the mounting segment (22) is provided with a cuboid hole D on the side, the mounting segment (22) is inserted into the cuboid hole A of the array disc (1), and the array disc (1) is fixed together through the locking buckle (3).

2. A microphone array boom mounting apparatus as claimed in claim 1, wherein, The mounting segment (22) of the array arm (2) is consistent with the shape of the cuboid hole A, so that the array arm is completely fitted and mounted into the array disc.

3. A microphone array boom mounting device according to claim 1, wherein, The cross-sectional length and width of the locking buckle (3) are consistent with the cross-sectional length and width of the cuboid hole B.

4. A microphone array boom mounting device according to claim 1, wherein, The thickness of the array segment (21) of the array arm (2) is the same as the thickness of the array disc (1).

5. A microphone array boom mounting apparatus as claimed in claim 1, wherein, The outer diameter of the spring (4) is greater than the width of the through hole C and less than the width of the cuboid hole B.

6. A microphone array boom mounting apparatus as claimed in claim 1, wherein, The length of the spring (4) is greater than the length of the through hole C.

7. A microphone array boom mounting apparatus as claimed in claim 1, wherein, The locking buckle (3) is provided with a threaded hole on the top surface, and the screw handle (5) is connected with the locking buckle (3) through the threaded hole.

8. A microphone array boom mounting apparatus according to claim 1 or 7, wherein, The face of the locking buckle (3) outward along the radial direction of the disc and the face toward the cuboid hole A jointly form a curved surface.

9. A microphone array boom mounting apparatus as claimed in claim 8, wherein, When the mounting segment (22) of the array arm is inserted into the cuboid hole A of the array disc (1), the locking buckle is pushed to move in the direction of the spring (4) through the curved surface, and when the array arm is mounted, the locking buckle is re-inserted into the cuboid hole D of the mounting segment (22) of the array arm under the action of the spring force, thereby locking the array arm and the array disc.

10. A microphone array boom mounting apparatus as claimed in claim 1, wherein, When the array arm is disassembled, the screw handle (5) is displaced away from the arm direction under the action of external force, thereby moving the locking buckle (3) and relaxing the array arm.

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