Program control device for improving directivity measurement precision of loudspeaker

Abstract

The utility model discloses a program control device for improving directivity measurement precision of a loudspeaker, and belongs to the technical field of loudspeakers. The microphone testing device comprises a driving mechanism, a connecting rod mechanism connected to the driving mechanism, and a microphone testing clamp arranged on the connecting rod mechanism. The driving mechanism at least comprises a program control rotary table arranged in the vertical direction. The connecting rod mechanism at least comprises a supporting rod in vertical transmission connection with the program control rotary table and a rail assembly vertically arranged at the preset position of the supporting rod. The program control rotary table and the connecting rod mechanism accurately control the position and the angle of the tested microphone, and it is ensured that the rotation center of the tested microphone is coaxial with a measurement reference point of the tested microphone in the vertical direction. The automatic measurement of all angles is realized, and the test convenience is provided; meanwhile, the rotation precision of the program-controlled turntable is ensured, and angle errors can be reduced. The stable sliding of the track sliding ball in the track assembly on the track ensures the stable sliding of the tested microphone at different angle positions, reduces the vibration and errors, and improves the measurement precision.

Description

Technical Field

[0001] The utility model belongs to the technical field of loudspeakers, and in particular relates to a program-controlled device for improving the measurement accuracy of loudspeaker directivity. Background Art

[0002] Testing the directivity of a loudspeaker unit requires setting up several test points at different angles on a hemispherical surface with the same radius. Traditional testing methods use a test stand placed at the test points. Using a single test microphone to move the test position or multiple test microphones at fixed positions is cumbersome, while the latter suffers from inconsistent performance across microphones and lacks accuracy. Furthermore, loudspeaker testing should not involve large linear devices at the test microphone end, as these devices can affect the test sound field, further impacting test accuracy. Utility Model Content

[0003] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a program-controlled device for improving the measurement accuracy of loudspeaker directivity.

[0004] The utility model adopts the following technical solution: a program-controlled device for improving the measurement accuracy of loudspeaker directivity, comprising: a driving mechanism, a connecting rod mechanism connected to the driving mechanism, and a test microphone fixture arranged on the connecting rod mechanism;

[0005] The driving mechanism comprises at least: a programmable turntable arranged in the vertical direction;

[0006] The connecting rod mechanism at least comprises: a support rod vertically connected to the programmable turntable, and a track component vertically arranged at a predetermined position of the support rod.

[0007] Preferably, the driving mechanism further comprises: a mounting bracket; and the programmable turntable is arranged on the mounting bracket.

[0008] Preferably, the track assembly includes: a track connecting rod vertically arranged on the support rod, and a track sliding ball arranged on the top of the track connecting rod.

[0009] Preferably, one end of the support rod is drivingly connected to the programmable turntable, and the other end of the support rod is connected to the test microphone fixture.

[0010] Preferably, the rotation accuracy of the programmable turntable has an error of no more than ±0.5° between the actual angle point and the preset angle point.

[0011] The beneficial effects of the present invention are as follows: a program-controlled device for improving the measurement accuracy of loudspeaker directivity. By adopting a program-controlled turntable and a connecting rod mechanism, the position and angle of the test microphone can be accurately controlled to ensure that its rotation center is coaxial with the measurement reference point of the test microphone in the vertical direction, which can effectively reduce the impact of the test device on the sound field, thereby improving the accuracy of loudspeaker directivity measurement; automatic measurement of all angles is achieved to provide convenience for testing; at the same time, the rotation accuracy of the program-controlled turntable is ensured, which can reduce angular errors. The mounting bracket can ensure the stability and reliability of the program-controlled turntable. The track connecting rod and the track sliding ball are provided, and the smooth sliding of the track sliding ball on the track can ensure the smooth sliding of the test microphone at different angles, reduce vibration and errors, and improve measurement accuracy.

[0012] The working principle of the present utility model is: install the programmable turntable on the mounting bracket to ensure its stability and reliability. Connect the support rod to the programmable turntable, and connect the test microphone fixture to the other end of the support rod. Set the track connecting rod and the track sliding ball to ensure the smooth sliding of the test microphone at different angles. By programming the preset measurement angle of the test microphone, ensure that the rotation accuracy of the programmable turntable does not exceed ±0.5° between the actual angle point and the preset angle point. Perform system calibration to ensure the accuracy and consistency of each test. Start the test program, and the programmable turntable rotates the test microphone to the preset measuring point. Perform the loudspeaker acoustic performance test and record the test data. After the test is completed, the programmable turntable automatically rotates to the next preset measuring point, and repeats the above steps until all measuring points are tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the present utility model.

[0014] In the accompanying drawings, the components represented by the reference numerals are as follows: mounting bracket 1 , programmable turntable 2 , support rod 3 , track sliding ball 4 , track connecting rod 5 , test microphone fixture 6 . DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the embodiments.

[0016] A program-controlled device for improving the measurement accuracy of loudspeaker directivity, such as Figure 1As shown, the system comprises a drive mechanism, a connecting rod mechanism connected to the drive mechanism, and a test microphone fixture 6 mounted on the connecting rod mechanism. The drive mechanism includes a mounting bracket 1; a programmable turntable 2 mounted on the mounting bracket 1, the programmable turntable 2 being arranged in a vertical direction; the rotation accuracy of the programmable turntable 2 is such that the error between the actual angle point and the preset angle point does not exceed ±0.5°. The connecting rod mechanism comprises at least a support rod 3 vertically connected to the programmable turntable 2, and a track assembly vertically positioned at a predetermined position on the support rod 3. The curved track supports the weight of the support rod 3 and the test microphone, while the programmable turntable 2 provides the rotational force required for directivity testing. The support rod 3 exhibits excellent rigidity. By using a programmable turntable 2 and a linkage mechanism, the position and angle of the test microphone can be precisely controlled, ensuring that its rotation center is vertically coaxial with the test microphone's measurement reference point. This effectively reduces the test device's impact on the sound field, thereby improving the accuracy of loudspeaker directivity measurements. Automatic measurement of all angles is achieved, providing convenient testing. The rotation accuracy of the programmable turntable 2 is also ensured, reducing angular errors. The mounting bracket 1 ensures the stability and reliability of the programmable turntable 2.

[0017] In a further embodiment, the track assembly includes a track link 5 vertically mounted on a support rod 3, and a track sliding ball 4 mounted on top of the track link 5. The track link 5 and the track sliding ball 4 allow the track sliding ball 4 to slide smoothly on the track, ensuring smooth movement of the test microphone at different angles and positions, reducing vibration and error.

[0018] In a further embodiment, one end of the support rod 3 is connected to the programmable turntable 2, and the other end of the support rod 3 is connected to the test microphone fixture 6. Through the transmission connection of the support rod 3, precise control of the test microphone at different angular positions can be ensured, thereby improving measurement accuracy.

[0019] The working principle of the present utility model is: the programmable turntable 2 is installed on the mounting bracket 1 to ensure its stability and reliability. The support rod 3 is connected to the programmable turntable 2 by transmission, and the test microphone fixture 6 is connected to the other end of the support rod 3. The track connecting rod 5 and the track sliding ball 4 are set to ensure the smooth sliding of the test microphone at different angles. By programming the preset measurement angle of the test microphone, it is ensured that the rotation accuracy of the programmable turntable 2 does not exceed ±0.5° between the actual angle point and the preset angle point. Perform system calibration to ensure the accuracy and consistency of each test. Start the test program, and the programmable turntable 2 rotates the test microphone to the preset measuring point. Perform a loudspeaker acoustic performance test and record the test data. After the test is completed, the programmable turntable 2 automatically rotates to the next preset measuring point, and repeats the above steps until all measuring points are tested.

[0020] A program-controlled device for improving the measurement accuracy of loudspeaker directivity is provided in detail. It is worth noting that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical details described in the aforementioned embodiments or make equivalent replacements for some of the technical features. Any equivalent replacements, modifications, etc. made within the core ideas and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A program-controlled device for improving the measurement accuracy of loudspeaker directivity, characterized in that: include: a driving mechanism, a connecting rod mechanism connected to the driving mechanism, and a test microphone fixture arranged on the connecting rod mechanism; The driving mechanism comprises at least: a programmable turntable arranged in the vertical direction; The connecting rod mechanism at least comprises: a support rod vertically connected to the programmable turntable, and a track component vertically arranged at a predetermined position of the support rod.

2. A program-controlled device for improving the measurement accuracy of loudspeaker directivity according to claim 1, characterized in that: The driving mechanism further comprises: a mounting bracket; the programmable turntable is arranged on the mounting bracket.

3. A program-controlled device for improving the measurement accuracy of loudspeaker directivity according to claim 1, characterized in that: The track assembly comprises a track connecting rod vertically arranged on the support rod, and a track sliding ball arranged on the top of the track connecting rod.

4. A program-controlled device for improving the measurement accuracy of loudspeaker directivity according to claim 1, characterized in that: One end of the support rod is connected to the programmable turntable in a transmission manner, and the other end of the support rod is connected to the test microphone fixture.

5. The program-controlled device for improving the measurement accuracy of loudspeaker directivity according to claim 1, characterized in that: The rotation accuracy of the programmable turntable is such that the error between the actual angle point and the preset angle point does not exceed ±0.5°.

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