Acoustic array support of double-measuring-surface microphone

By designing a dual-measurement-surface microphone array bracket, adopting a bottom slide rail and an upper cubic support frame structure, and combining a stepper motor and a synchronous belt moving component, the scalability and cost issues of existing array brackets when measuring medium and large equipment are solved, and near-field sound field measurement and inspection of medium and large equipment are realized, thereby improving test efficiency and reducing costs.

CN120659003APending Publication Date: 2025-09-16XI AN JIAOTONG UNIV
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202411136587.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-08-19
Publication Date
2025-09-16

AI Technical Summary

Technical Problem

Existing acoustic array brackets have difficulty in simultaneously measuring the sound field information of two spatial planes when measuring medium and large equipment. They also have high manufacturing costs, lack scalability and versatility, and cannot achieve remote control and directional movement.

Method used

A dual-surface microphone array bracket was designed, which adopted a bottom slide rail structure and an upper cubic support frame, combined with a stepper motor and a synchronous belt moving assembly to achieve precise movement of the sensor and simplify wiring, while using standard parts and finished products to reduce costs.

Benefits of technology

It realizes the near-field sound field measurement and inspection of medium and large equipment of different sizes and dimensions, improves the repeatability and efficiency of the test, reduces the manufacturing cost and maintenance cost of the equipment, and has good scalability and versatility.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN120659003A_ABST
    Figure CN120659003A_ABST
Patent Text Reader

Abstract

According to the double-measuring-plane microphone acoustic array support, a linear rail assembly is connected with a straight rod, the linear rail assembly comprises a linear rail extending along the straight rod, a plurality of linear rail sliding blocks movably connected with the linear rail and a linear rail support, and the two ends of the linear rail support are connected with the linear rail sliding blocks respectively; the upper cubic supporting frame structure is movably supported on the bottom sliding rail structure, the two ends of the sensor mounting rod are connected between the two measuring face cross beams on the same vertical face, and the extending direction of the sensor mounting rod is the vertical direction. The two ends of the sensor installation rod are respectively provided with a linear rail supporting frame matched with the measuring face cross beam and a second linear rail sliding block which is fixed on the inner side of the linear rail supporting frame and slides relative to the measuring face cross beam. The plurality of sensor assemblies are installed on the sensor installation rod in an array mode. The bracket realizes remote control measurement, effectively solves the problems of wiring winding, accurate movement, simultaneous sound field measurement and sound field inspection and the like, and remarkably improves the repeatability and efficiency of the test.
Need to check novelty before this filing date? Find Prior Art

Claims

1. A dual-measurement-surface microphone array bracket, characterized in that: These include, The bottom slide rail structure includes: A pair of straight rods, arranged parallel to each other at intervals, Multiple support rods, the support rods are horizontally connected between a pair of straight rods, A linear rail assembly connected to the straight rod, the linear rail assembly comprising a linear rail extending along the straight rod, a plurality of linear rail sliders movably connected to the linear rail, and a linear rail bracket with both ends respectively connected to the linear rail sliders; Two synchronous belt moving assemblies, the synchronous belt moving assembly is installed at one end of the straight rod, and the synchronous belt moving assembly includes a stepper motor bracket connected to one side of the straight rod, a stepper motor installed on the stepper motor bracket, a synchronous wheel connected to the stepper motor, and a synchronous belt provided on the synchronous wheel. The synchronous belt is connected to the linear rail bracket. When the stepper motor rotates, one side of the linear rail bracket is pulled in a specified direction; An upper cube support frame structure is movably supported on the bottom slide rail structure, and the upper cube support frame structure includes: At least two sets of supporting frame structures, each of which is movably supported on a pair of straight rods, At least four sets of measuring surface control rods, both ends of which are horizontally connected to two sets of support frame structures and located between the two sets of support frame structures, and the measuring surface control rods include a screw assembly and a measuring surface support frame connected to the screw assembly. At least four sets of measuring surface cross beams, the two ends of the measuring surface cross beams are connected to the measuring surface support frames of the two measuring surface control rods on the same horizontal plane, and the extending direction of the measuring surface cross beams is parallel to the extending direction of the straight rods, Multiple sensor mounting rods, both ends of the sensor mounting rods are connected between two measuring surface beams in the same vertical plane and the extending direction of the sensor mounting rods is vertical. Both ends of the sensor mounting rods are respectively provided with a linear rail support frame that matches the measuring surface beams and a second linear rail slider fixed to the inner side of the linear rail support frame and sliding relative to the measuring surface beams. A plurality of sensor assemblies, an array of which is mounted on the sensor mounting rod, the sensor assemblies comprising: The sensor support frame has one end clamped to the sensor mounting rod and extends horizontally. The sensor is mounted on the sensor support frame via a buckle.

2. The dual-measurement-surface microphone array support according to claim 1, wherein: Preferably, the bottom slide rail structure also includes a tensioner, which is installed at the other end of the straight rod. The tensioner includes a tensioner bracket connected to the other end of the straight rod, another synchronous wheel rotatably connected to the tensioner bracket, and a handle nut for adjusting the relative horizontal position of the synchronous wheel.

3. The dual-measurement-surface microphone array support according to claim 1, wherein: The support rods and the straight rods form a sun-shaped structure.

4. The dual-measurement-surface microphone array support according to claim 1, wherein: A pair of connecting rods: the bottom slide rail structure also includes a pair of connecting rods, the connecting rods are transversely connected between the pair of straight rods, and the pair of connecting rods are respectively located at the front end and the rear end of the straight rods.

5. The dual-measurement-surface microphone array support according to claim 1, wherein: The screw assembly includes: The second stepper motor is located at the end of the measuring surface control rod and is limited by a motor limiter. A ball screw is connected to the second stepper motor via a coupling, and the ball screw is supported by an adjustable screw bracket.

6. The dual-measurement-surface microphone array support according to claim 1, wherein: A cylindrical groove matching the sensor surface is provided in the middle of the sensor support frame.

7. The dual-measurement-surface microphone array support according to claim 1, wherein: A plurality of sensor mounting rods and sensor components between two measuring surface beams in the same vertical plane constitute a measuring surface.

8. The dual-measurement-surface microphone array support according to claim 7, characterized in that: The device to be tested is suspended between the two measuring surfaces, and the sensors are placed opposite each other to form a three-dimensional free-field sound field measurement in a limited space.

9. The dual-measurement-plane microphone array support according to claim 1, wherein: The straight rods and support rods are formed by splicing aluminum profiles.

10. The dual-measurement-plane microphone array support according to claim 1, wherein: Fix the two ends of the support rod under the two straight rods respectively through the corner fittings.