Microphone test rotary table

Abstract

The utility model discloses a microphone test rotary table, which relates to the technical field of microphone test and comprises a test support used for clamping a microphone and connected with an electrode of the microphone; the rotary table is arranged below the test support and used for adjusting the rotation angle of the test support so as to test output signal values of the microphone at different point positions; the rotary table is arranged on the base; the conductive slip ring comprises an inner ring and an outer ring, the outer ring is fixedly connected with the base, and the test support is coaxially connected with the inner ring and the rotary table; an electrode of the microphone is electrically connected with the tester through the conductive slip ring; a wire between the microphone and the tester passes through the conductive slip ring, so that the wire is prevented from being wound when the angle of the turntable is changed; the fifth metal clamp is used for clamping the microphone, the microphone clamping device can adapt to microphones of different sizes, meanwhile, when the microphone clamping device faces sound sources of different heights, the telescopic tripod, the telescopic rod and the second bolt can be used for adjusting the height, and the application range is wide.

Description

Technical Field

[0001] This utility model relates to the field of microphone testing technology, and in particular to a microphone testing turntable. Background Technology

[0002] A microphone is an energy conversion device that converts sound signals into electrical signals. After the microphone is manufactured, its directional characteristics are tested. This test assesses the microphone's sensitivity to sound from different directions. Traditional microphone directional characteristic testing is usually conducted in a fully or partially anechoic chamber. During the test, the microphone under test is placed on a turntable, and a sound source located directly in front of the microphone generates a sound signal with a specified frequency and sound pressure level. As the turntable angle changes, the signal values ​​output by the microphone at different angular positions are recorded. However, current microphone testing turntables are large and heavy, which not only increases space requirements but also raises transportation and installation costs.

[0003] A search revealed patent number CN221901025U, which discloses a small turntable device supporting microphone directional feature testing. The device includes a test bracket, a servo motor top flange, an encoder, a micro servo motor, and a micro servo motor base. The encoder is mounted on the output end of the micro servo motor, and the servo motor top flange is mounted on top of the micro servo motor and connected to the test bracket. The bottom of the test bracket is bolted to the servo motor top flange. The micro servo motor is mounted on the micro servo motor base. This device is small in size and weight, making it easy to carry and use. It is also inexpensive, interchangeable, and has a wide range of applications. However, the device suffers from tangled wires during use, and the height can only be roughly adjusted using a tripod, resulting in less than ideal adjustment accuracy. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a microphone testing turntable that addresses the above-mentioned shortcomings, overcomes the defects of wire tangling and unsatisfactory adjustment accuracy, and achieves the purpose of avoiding wire tangling and high adjustment accuracy.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a microphone testing turntable, characterized in that it includes:

[0006] Test bracket, used to hold the microphone and connect it to the microphone's electrodes;

[0007] A turntable, located below the test stand, is used to adjust the rotation angle of the test stand in order to test the output signal value of the microphone at different points.

[0008] The base and turntable are mounted on the base.

[0009] The conductive slip ring includes an inner ring and an outer ring. The outer ring is fixedly connected to the base, and the test bracket is coaxially connected to the inner ring and the turntable.

[0010] The microphone electrodes are electrically connected to the tester via conductive slip rings.

[0011] Furthermore, the test bracket includes a fixing block, on which a metal connecting rod and a first conductive rod are fitted, and a fifth metal clamp is fixedly connected to the upper end of the metal connecting rod.

[0012] Furthermore, a first test pin is provided at the top of the first conductive rod, and the first test pin, microphone and first conductive rod are electrically connected.

[0013] Furthermore, a telescopic rod is provided between the conductive slip ring and the test bracket, a telescopic tripod is provided under the base, an ammeter is provided on one side of the base, and a support frame is provided on the base to support the conductive slip ring.

[0014] Furthermore, a third bolt is provided on one side of the fixing block. The third bolt is perpendicular to the first conductive rod and is used to fix the first conductive rod.

[0015] Furthermore, a second bolt is provided on the fixing block, which is used to fix the fixing block to the metal connecting rod.

[0016] Furthermore, a second conductive rod is also fitted onto the fixing block, and a second test pin is provided on the top of the second conductive rod. The second test pin, the microphone, and the second conductive rod are electrically connected.

[0017] Furthermore, a first bolt is provided on the other side of the fixing block. The first bolt is perpendicular to the second conductive rod and is used to fix the second conductive rod.

[0018] Furthermore, a negative conductive plate is provided at the lower part of the metal connecting rod, and the metal connecting rod, the first conductive rod, and the second conductive rod are arranged in parallel.

[0019] Furthermore, the metal connecting rod, the first conductive rod, and the second conductive rod are electrically connected to the inner ring of the conductive slip ring, and the outer ring of the conductive slip ring is electrically connected to the tester.

[0020] The present invention adopts the above technical solution and has the following advantages compared with the prior art: the wire between the microphone and the tester passes through the conductive slip ring to avoid the wire getting tangled when changing the turntable angle; the microphone is held by the fifth metal clamp, which can adapt to microphones of different sizes. At the same time, when facing sound sources of different heights, the telescopic tripod, telescopic rod and the second bolt can all be used to adjust the height, making it widely applicable. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the microphone testing turntable in Embodiment 1 of this utility model;

[0022] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 3 This is a schematic diagram of the microphone testing turntable in Embodiment 2 of this utility model;

[0024] Figure 4 for Figure 3 A magnified structural diagram at point B in the middle.

[0025] In the diagram: 1-Telescopic tripod, 2-Base, 3-Turntable, 4-Conductive slip ring, 5-Support frame, 6-First terminal block, 7-Second terminal block, 8-Third terminal block, 9-Telescopic rod, 10-Ammeter, 11-Negative conductive plate, 12-Sleeve, 13-Metal connecting rod, 14-First conductive rod, 15-Second conductive rod, 16-First test probe, 17-Second test probe, 18-Fixing block, 19-First bolt, 20-Second bolt, 21-Third bolt, 22-First metal clamp, 23-Second metal clamp, 24-Third metal clamp, 25-Fourth metal clamp, 26-Fifth metal clamp, 27-Microphone. Detailed Implementation

[0026] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0027] Example 1, as Figure 1-2 As shown, the microphone test turntable includes a test bracket, a turntable 3, and a conductive slip ring 4. The test bracket is used to hold the microphone 27 and connect it to the electrodes of the microphone 27. The turntable 3 is located below the test bracket and is used to adjust the rotation angle of the test bracket to test the output signal value of the microphone at different points. A base 2 is provided below the turntable 3. The conductive slip ring 4 includes an inner ring and an outer ring. The outer ring is fixedly connected to the base 2. The test bracket is coaxially connected to the inner ring and the turntable 3.

[0028] A telescopic tripod 1 is installed below the base 2. An ammeter 10 and a first terminal block 6 are installed on one side of the base 2. A support frame 5 is also installed on the base 2. The support frame 5 is used to support the conductive slip ring 4. A second terminal block 7 is installed on the support frame 5.

[0029] A telescopic rod 9 is also provided between the conductive slip ring 4 and the test bracket. The test bracket includes a fixing block 18. A metal connecting rod 13 and a first conductive rod 14 are sleeved on the fixing block 18. A fifth clamp 26 is fixedly connected to the upper end of the metal connecting rod 13. The fifth metal clamp 26 is used to clamp the microphone 27. A negative conductive plate 11 is provided at the lower part of the metal connecting rod 13. A first metal clamp 22 is provided on the negative conductive plate 11. A sleeve 12 is provided between the metal connecting rod 13 and the fixing block 18.

[0030] A first test pin 16 is provided on the top of the first conductive rod 14. The first test pin 16, microphone 27 and the first conductive rod 14 are electrically connected. A third bolt 21 is provided on one side of the fixing block 18. The third bolt 21 is perpendicular to the first conductive rod 14. The third bolt 21 is used to fix the first conductive rod 14. When it is necessary to slightly adjust the height of the first conductive rod 14, the third bolt 21 is rotated to make the first conductive rod 14 move up and down in the fixing block 18. A fourth metal clamp 25 is also provided on the third bolt 21.

[0031] The metal connecting rod 13 is arranged parallel to the first conductive rod 14.

[0032] The telescopic rod 9 is provided with a third terminal block 8, and the fixing block 18 is provided with a second bolt 20. The second bolt 20 is used to fix the fixing block 18 to the metal connecting rod 13. When it is necessary to adjust the height of the fixing block 18, the second bolt 20 is rotated to make the fixing block 18 move up and down along the sleeve 12.

[0033] Turntable 3 can be rotated using a remote control to test the output signal value of the microphone at different points.

[0034] The microphone 27 has a metal housing, which serves as the negative electrode of the microphone 27.

[0035] The microphone 27 is electrically connected to the tester (not shown in the figure) through the conductive slip ring 4. The metal connecting rod 13 and the first conductive rod 14 are electrically connected to the inner ring of the conductive slip ring 4, and the outer ring of the conductive slip ring 4 is electrically connected to the tester.

[0036] The wiring connections of microphone 27, power supply, ammeter 10 and tester are existing technologies and will not be described in detail here.

[0037] Working principle: When testing a two-wire electret microphone, the microphone's electrodes include a positive and a negative terminal. First, adjust the telescopic tripod 1 to a suitable height, clamp the microphone 27 with the fifth metal clamp 26, adjust the height of the first conductive rod 14 so that the first test probe 16 contacts the positive terminal of the microphone 27, fix the first conductive rod 14 with the third bolt 21, connect the microphone 27, power supply, ammeter 10 and tester, and use a remote control to rotate the turntable 3. By continuously changing the angle of the turntable 3, the tester records the output signal values ​​at different angle positions.

[0038] Example 2, as Figure 3-4 As shown, the microphone test turntable includes a test bracket, a turntable 3, and a conductive slip ring 4. The test bracket is used to hold the microphone 27 and connect it to the electrodes of the microphone 27. The turntable 3 is located below the test bracket and is used to adjust the rotation angle of the test bracket to test the output signal value of the microphone at different points. A base 2 is provided below the turntable 3. The conductive slip ring 4 includes an inner ring and an outer ring. The outer ring is fixedly connected to the base 2. The test bracket is coaxially connected to the inner ring and the turntable 3.

[0039] A telescopic tripod 1 is installed below the base 2. An ammeter 10 and a first terminal block 6 are installed on one side of the base 2. A support frame 5 is also installed on the base 2. The support frame 5 is used to support the conductive slip ring 4. A second terminal block 7 is installed on the support frame 5.

[0040] A telescopic rod 9 is also provided between the conductive slip ring 4 and the test bracket. The test bracket includes a fixing block 18. A metal connecting rod 13, a first conductive rod 14 and a second conductive rod 15 are sleeved on the fixing block 18. A fifth clamp 26 is fixedly connected to the upper end of the metal connecting rod 13. The fifth metal clamp 26 is used to clamp the microphone 27. A negative electrode conductive plate 11 is provided at the lower part of the metal connecting rod 13. A first metal clamp 22 and a second metal clamp 23 are provided on the negative electrode conductive plate 11. A sleeve 12 is provided between the metal connecting rod 13 and the fixing block 18.

[0041] The top of the first conductive rod 14 is provided with a first test needle 16, and the first test needle 16, microphone 27 and the first conductive rod 14 are electrically connected. The top of the second conductive rod 15 is provided with a second test needle 17, and the second test needle 17, microphone 27 and the second conductive rod 15 are electrically connected.

[0042] A third bolt 21 is provided on one side of the fixing block 18. The third bolt 21 is perpendicular to the first conductive rod 14. The third bolt 21 is used to fix the first conductive rod 14. When it is necessary to slightly adjust the height of the first conductive rod 14, the third bolt 21 is rotated to make the first conductive rod 14 move up and down in the fixing block 18.

[0043] A first bolt 19 is provided on the other side of the fixing block 18. The first bolt 19 is perpendicular to the second conductive rod 15. The first bolt 19 is used to fix the second conductive rod 15. When it is necessary to slightly adjust the height of the second conductive rod 15, the first bolt 19 is rotated so that the second conductive rod 15 can move up and down in the fixing block 18.

[0044] A fourth metal clamp 25 is provided on the third bolt 21, and a third metal clamp 24 is provided on the first bolt 19. The third metal clamp 24 is electrically connected to the second metal clamp 23.

[0045] The first conductive rod 14 and the second conductive rod 15 are arranged parallel to the metal connecting rod 13.

[0046] The telescopic rod 9 is provided with a third terminal block 8, and the fixing block 18 is provided with a second bolt 20. The second bolt 20 is used to fix the fixing block 18 to the metal connecting rod 13. When it is necessary to adjust the height of the fixing block 18, the second bolt 20 is rotated to make the fixing block 18 move up and down along the sleeve 12.

[0047] Turntable 3 can be rotated using a remote control to test the output signal value of the microphone at different points.

[0048] The microphone 27 has a metal housing, which serves as the negative electrode of the microphone 27.

[0049] The microphone 27 is electrically connected to the tester (not shown in the figure) through the conductive slip ring 4. The metal connecting rod 13, the first conductive rod 14, and the second conductive rod 15 are electrically connected to the inner ring of the conductive slip ring 4, and the outer ring of the conductive slip ring 4 is electrically connected to the tester.

[0050] The wiring connections of microphone 27, power supply, ammeter 10 and tester are existing technologies and will not be described in detail here.

[0051] Working principle: When testing a three-wire electret microphone, the microphone's electrodes include a positive electrode, a negative electrode, and a source electrode. First, adjust the telescopic tripod 1 to a suitable height, clamp the microphone 27 with the fifth metal clamp 26, adjust the height of the first conductive rod 14 so that the first test probe 16 contacts the positive electrode of the microphone 27, and fix the first conductive rod 14 with the third bolt 21. Adjust the height of the second conductive rod 15 so that the second test probe 17 contacts the source electrode of the microphone 27, and fix the second conductive rod 15 with the first bolt 19. Connect the microphone 27, power supply, ammeter 10, and tester. Use a remote control to rotate the turntable 3. By continuously changing the angle of the turntable 3, the tester records the microphone signal values ​​at different angle positions.

[0052] The wire between the microphone and the tester passes through the conductive slip ring 4 to prevent the wire from getting tangled when changing the angle of the turntable 3; the microphone 27 is held by the fifth metal clamp 26, which can accommodate microphones 27 of different sizes. At the same time, when facing sound sources of different heights, the telescopic tripod 1, telescopic rod 9, and second bolt 20 can all be used to adjust the height, making it widely applicable.

[0053] The turntable 3 and the remote control are commercially available products. They can rotate at different angles under the control of the remote control. In this embodiment, the turntable 3 is not limited to a specific structure, as long as it can achieve this function.

[0054] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is clear to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A microphone testing turntable, characterized in that, Includes: A test stand for holding the microphone (27) and connecting it to the electrodes of the microphone (27); A turntable (3) is set below the test bracket to adjust the rotation angle of the test bracket in order to test the output signal value of the microphone at different points; The base (2) and the turntable (3) are set on the base (2); The conductive slip ring (4) includes an inner ring and an outer ring. The outer ring is fixedly connected to the base (2), and the test bracket is coaxially connected to the inner ring and the turntable (3). The microphone electrodes are electrically connected to the tester via a conductive slip ring (4).

2. The microphone testing turntable according to claim 1, characterized in that, The test bracket includes a fixing block (18), on which a metal connecting rod (13) and a first conductive rod (14) are fitted. The upper end of the metal connecting rod (13) is fixedly connected to a fifth metal clamp (26).

3. The microphone testing turntable according to claim 2, characterized in that, The top of the first conductive rod (14) is provided with a first test needle (16), and the first test needle (16), microphone (27) and first conductive rod (14) are electrically connected.

4. The microphone testing turntable according to claim 3, characterized in that, A telescopic rod (9) is also provided between the conductive slip ring (4) and the test bracket. A telescopic tripod (1) is provided under the base (2). An ammeter (10) is provided on one side of the base (2). A support frame (5) is also provided on the base (2). The support frame (5) is used to support the conductive slip ring (4).

5. The microphone testing turntable according to claim 4, characterized in that: A third bolt (21) is provided on one side of the fixing block (18). The third bolt (21) is perpendicular to the first conductive rod (14) and is used to fix the first conductive rod (14).

6. The microphone testing turntable according to claim 2, characterized in that, A second bolt (20) is provided on the fixing block (18), which is used to fix the fixing block (18) to the metal connecting rod (13).

7. The microphone testing turntable according to claim 6, characterized in that, A second conductive rod (15) is also fitted on the fixing block (18). A second test needle (17) is provided on the top of the second conductive rod (15). The second test needle (17), the microphone (27), and the second conductive rod (15) are electrically connected.

8. The microphone testing turntable according to claim 7, characterized in that, A first bolt (19) is provided on the other side of the fixing block (18). The first bolt (19) is perpendicular to the second conductive rod (15) and is used to fix the second conductive rod (15).

9. The microphone testing turntable according to claim 7, characterized in that, A negative electrode conductive sheet (11) is provided at the lower part of the metal connecting rod (13), and the metal connecting rod (13), the first conductive rod (14), and the second conductive rod (15) are arranged in parallel.

10. The microphone testing turntable according to claim 9, characterized in that, The metal connecting rod (13), the first conductive rod (14), and the second conductive rod (15) are electrically connected to the inner ring of the conductive slip ring (4), and the outer ring of the conductive slip ring (4) is electrically connected to the tester.

Images