Diaphragm acoustic FO testing device

Abstract

The utility model provides a diaphragm acoustic FO testing device, which relates to the technical field of acoustic testing and comprises a test data analyzer, a diaphragm acoustic FO testing assembly is arranged on the upper side of the test data analyzer, a microphone clamping frame is arranged in the middle of a microphone position adjusting rod, a high-precision microphone is mounted on the inner side of the microphone clamping frame, and a loudspeaker is mounted on the inner side of the high-precision microphone. A diaphragm clamping table is arranged on the upper side of the high-precision microphone, a lower clamping piece is welded to the middle of the diaphragm clamping table, a loudspeaker clamping table is arranged on the upper side of the diaphragm clamping table, a loudspeaker clamping frame is welded to the middle of the loudspeaker clamping table, and a high-definition loudspeaker is installed on the inner side of the loudspeaker clamping frame. The microphone clamping frame can drive the high-definition microphone to carry out angle adjustment along the microphone position adjusting rod, the accuracy and stability of data acquisition are improved, the loudspeaker clamping table adopts the same adjusting mode as the diaphragm clamping table, the loudspeaker clamping frame and the lower clamping piece are located on the same Z axis, and it is ensured that the relative positions of the high-definition loudspeaker and the diaphragm are accurate.

Description

Technical Field

[0001] This utility model relates to the field of acoustic testing technology, and in particular to a diaphragm acoustic FO testing device. Background Technology

[0002] A diaphragm acoustic FO test apparatus is a device used to test the lowest resonant frequency (FO) of a vibrating diaphragm in an acoustic device. It typically contains a sealed chamber. When the diaphragm vibrates, the sound pressure inside the chamber changes. By testing this change, the lowest resonant frequency of the diaphragm can be determined, which is crucial for evaluating the performance of the acoustic device.

[0003] A search revealed that the document with publication number "CN222339613U" mentions "This utility model discloses an acoustic testing device for intelligent speakers, relating to the technical field of testing devices. It includes a base, a detection mechanism, and a fixing mechanism. The base surface has a detection mechanism and a sliding groove. A servo motor is installed within the sliding groove. The output shaft of the servo motor is connected to a bidirectional lead screw. The two ends of the bidirectional lead screw have opposite threads, and sliders are installed at both ends of the bidirectional lead screw. The sliders are connected to the fixing mechanism." The beneficial effects of this utility model are: the drive motor operates, causing the moving block on the threaded rod to move, thereby moving the gantry frame to the speaker of the speaker. The electric push rod extends, moving the acoustic testing instrument to the appropriate position, avoiding manual support, saving time and effort, and improving work efficiency. The fixing mechanism enables the fixing and clamping of speakers of different sizes, improving the practicality of the device, while preventing the device from falling and being damaged, improving safety, and extending the speaker's service life.

[0004] However, in existing diaphragm acoustic FO testing technology, it is usually necessary to make precise position adjustments to high-precision microphones and loudspeakers to ensure the accuracy and consistency of test data. Traditional testing equipment often adopts fixed or simple adjustable structures. Although these structures can complete basic testing tasks, they are insufficient in terms of accurately aligning test points, keeping the diaphragm flat, and quickly adjusting the height.

[0005] Therefore, we provided a diaphragm acoustic FO testing device to solve the above problems. Utility Model Content

[0006] To overcome the above deficiencies, this utility model provides a diaphragm acoustic FO testing device.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A diaphragm acoustic FO testing device includes a test data analyzer. A diaphragm acoustic FO testing assembly is mounted on the upper side of the test data analyzer. The diaphragm acoustic FO testing assembly includes a test platform positioned at the center of the upper side of the test data analyzer. Support bolt rods are connected to the four corner slots of the test platform. Microphone support rods are positioned in the middle of each support bolt rod. A microphone position adjustment rod is connected to the middle of each microphone support rod. A microphone holder is positioned in the middle of each microphone position adjustment rod. A high-precision microphone is mounted inside the microphone holder. Limiters are provided on the upper side of each microphone support rod. The nut has an adjusting plate on its upper left side. The high-precision microphone has a diaphragm holder on its upper side. A lower clamp is welded to the middle of the diaphragm holder. An adjusting connecting plate is welded to the left side of the lower clamp. An adjusting bolt is threaded to the inner end of the adjusting connecting plate. A speaker holder is located on the upper side of the diaphragm holder. A speaker bracket is welded to the middle of the speaker holder. A high-definition speaker is installed inside the speaker bracket. A ruler groove is located on the left side of the speaker holder. A distance measuring ruler is installed inside the ruler groove. A limiting groove is located on the outer side of the testing platform.

[0009] As a further description of the above technical solution:

[0010] The microphone support rod and the support bolt rod are connected by a slot. The microphone support rods are arranged symmetrically in two groups on the left and right. The microphone position adjustment rod and the microphone support rod are slidably connected. The microphone holder and the microphone position adjustment rod are connected by a slot. The microphone holder, the microphone position adjustment rod and the microphone support rod constitute an angle adjustment structure.

[0011] As a further description of the above technical solution:

[0012] The upper clamping plate is connected to the upper clamping plate through the upper slot of the lower clamping plate, and the upper clamping plate and the lower clamping plate are fixed together by screws.

[0013] As a further description of the above technical solution:

[0014] The end of the height adjustment bolt contacts the adjustment plate, and the two ends of the diaphragm plate are sleeved with the support bolt rod. The height adjustment bolt and the adjustment plate work together with the adjustment plate to adjust the height of the diaphragm plate.

[0015] As a further description of the above technical solution:

[0016] The speaker bracket and the diaphragm bracket are arranged vertically symmetrically, and the speaker holder and the lower clamp are arranged in concentric circles vertically.

[0017] As a further description of the above technical solution:

[0018] The measuring ruler and the ruler groove are connected by a slot, and the end of the measuring ruler is in contact with the diaphragm plate. The measuring ruler is adjusted according to the distance between the speaker plate and the diaphragm plate.

[0019] As a further description of the above technical solution:

[0020] The inner side of the limiting slot is padded with a rubber pad, and a soundproof cover is installed on the upper side of the rubber pad. The soundproof cover is made of transparent acrylic sheet.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. This utility model utilizes a diaphragm acoustic FO testing component. When needed, the microphone position adjustment rod can slide along the microphone support rod, and the microphone holder can also adjust the angle of the high-precision microphone along the microphone position adjustment rod, ensuring that the high-precision microphone is accurately aligned with the test point, thus improving the accuracy and stability of data acquisition. The speaker holder adopts the same adjustment method as the diaphragm holder, with the speaker holder and the lower clamp on the same Z-axis, ensuring the precise relative position of the high-definition speaker and the diaphragm. Furthermore, the operator can precisely adjust the distance between the two by reading the scale of the measuring ruler, ensuring the consistency of the testing environment and further optimizing the accuracy of data acquisition.

[0023] 2. This utility model uses a diaphragm acoustic FO testing assembly. The lower and upper clamps hold the diaphragm to be tested and are secured with bolts. The engagement of the lower and upper clamps maximizes the control of the diaphragm's tension, ensuring the diaphragm remains flat during testing and reducing errors. The height of the adjusting plate is determined by the height of the limit nut. When fine-tuning the height of the diaphragm clamp is required, simply rotate the height adjusting bolt, and the adjusting plate will move the diaphragm clamp up and down to achieve precise height adjustment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall appearance structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the cooperative structure of the test data analyzer and the soundproof enclosure of this utility model;

[0026] Figure 3 This is a schematic diagram of the overall structure of the diaphragm acoustic FO test assembly of this utility model.

[0027] Figure 4 This is a schematic diagram of the mating structure between the support bolt rod and the high-precision microphone of this utility model;

[0028] Figure 5 This is a schematic diagram of the mating structure of the diaphragm card holder and the speaker card holder of this utility model;

[0029] Figure 6 This is a schematic diagram of the cooperative structure of the diaphragm holder, upper clamp, and adjusting connecting plate of this utility model.

[0030] The diagram is labeled as follows: 1. Test data analyzer; 2. Diaphragm acoustic FO test assembly; 201. Test platform; 202. Support bolt rod; 203. Microphone support rod; 204. Microphone position adjustment rod; 205. Microphone holder; 206. High-precision microphone; 207. Limit nut; 208. Adjustment plate; 209. Diaphragm holder; 210. Lower clamp; 211. Upper clamp; 212. Adjustment connecting plate; 213. Height adjustment bolt; 214. Speaker holder; 215. Speaker holder; 216. High-definition speaker; 217. Ruler groove; 218. Rangefinder; 3. Limit groove; 4. Rubber pad; 5. Soundproof enclosure. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figure 1-6As shown, this utility model provides a technical solution: a diaphragm acoustic FO testing device, including a test data analyzer 1, a diaphragm acoustic FO testing assembly 2 disposed on the upper side of the test data analyzer 1, the diaphragm acoustic FO testing assembly 2 including a test platform 201 disposed at the center of the upper side of the test data analyzer 1, support bolt rods 202 connected to the four corner slots of the test platform 201, microphone support rods 203 disposed in the middle of each support bolt rod 202, microphone position adjustment rods 204 connected in the middle of each microphone support rod 203, microphone holders 205 disposed in the middle of each microphone position adjustment rod 204, high-precision microphones 206 mounted on the inner side of each microphone holder 205, and limit screws disposed on the upper side of each microphone support rod 203. The upper left side of the mother 207 and the limit nut 207 is provided with an adjusting plate 208. The upper side of the high-precision microphone 206 is provided with a diaphragm holder 209. The middle of the diaphragm holder 209 is welded with a lower clamping plate 210. The left side of the lower clamping plate 210 is welded with an adjusting connecting plate 212. The inner side of the end of the adjusting connecting plate 212 is threaded with an adjusting bolt 213. The upper side of the diaphragm holder 209 is provided with a speaker holder 214. The middle of the speaker holder 214 is welded with a speaker bracket 215. The inner side of the speaker bracket 215 is equipped with a high-definition speaker 216. The left side of the speaker holder 214 is provided with a ruler groove 217. The inner side of the ruler groove 217 is equipped with a distance measuring ruler 218. The outer side of the test platform 201 is provided with a limit groove 3.

[0033] Furthermore, the microphone support rod 203 and the support bolt rod 202 are connected by a slot. The microphone support rod 203 is arranged symmetrically in two sets on the left and right sides. The microphone position adjustment rod 204 is slidably connected to the microphone support rod 203. The microphone holder 205 is connected to the microphone position adjustment rod 204 by a slot. The microphone holder 205, the microphone position adjustment rod 204, and the microphone support rod 203 form an angle adjustment structure. When needed, the microphone position adjustment rod 204 can slide along the microphone support rod 203, and the microphone holder 205 can also adjust the angle of the high-precision microphone 206 along the microphone position adjustment rod 204, ensuring that the high-precision microphone 206 is accurately aligned with the test point, thereby improving the accuracy and stability of data acquisition.

[0034] Furthermore, the upper side of the lower clamp 210 is connected to the upper clamp 211. The upper clamp 211 and the lower clamp 210 are fixed by screws. When needed, the lower clamp 210 and the upper clamp 211 hold the membrane to be tested in them and are tightened by bolts. The engagement of the lower clamp 210 and the upper clamp 211 can maximize the control of the membrane tension itself, ensure that the membrane remains flat during the test, and reduce errors.

[0035] Furthermore, the end of the height adjustment bolt 213 contacts the adjusting plate 208, and both ends of the diaphragm plate 209 are sleeved with the support bolt rod 202. The height adjustment bolt 213 and the adjusting connecting plate 212 work together with the adjusting plate 208 to adjust the height of the diaphragm plate 209. When needed, the height of the adjusting plate 208 is determined according to the height of the limit nut 207. When the height of the diaphragm plate 209 needs to be finely adjusted, simply rotate the height adjustment bolt 213, and the adjusting connecting plate 212 will drive the diaphragm plate 209 to move up and down to achieve precise height adjustment.

[0036] Furthermore, the speaker bracket 214 and the diaphragm bracket 209 are arranged vertically symmetrically, and the speaker holder 215 and the lower clamp 210 are arranged in concentric circles vertically. When needed, the speaker bracket 214 adopts the same adjustment method as the diaphragm bracket 209, wherein the speaker holder 215 and the lower clamp 210 are on the same Z-axis, ensuring that the relative position of the high-definition speaker 216 and the diaphragm is accurate.

[0037] Furthermore, the measuring ruler 218 and the ruler groove 217 are connected by a slot. The end of the measuring ruler 218 is in contact with the diaphragm mounting plate 209. The measuring ruler 218 changes according to the distance between the speaker mounting plate 214 and the diaphragm mounting plate 209. When needed, the operator can accurately adjust the distance between the two by reading the scale of the measuring ruler 218 to ensure the consistency of the test environment and further optimize the accuracy of data acquisition.

[0038] Furthermore, a rubber pad 4 is placed on the inner side of the limiting slot 3, and a soundproof cover 5 is installed on the upper side of the rubber pad 4. The soundproof cover 5 is made of transparent acrylic sheet. When needed, the soundproof cover 5 fits tightly against the limiting slot 3 through the rubber pad 4, effectively isolating external noise interference. The soundproof cover 5 is made of acrylic sheet, which, compared with glass, can reduce the damage of sound resonance to the soundproof cover 5 itself.

[0039] Working principle: When needed, place the test data analyzer 1 in the required position, then insert the four support bolts 202 into the holes of the test platform 201. After preparation, insert the high-precision microphone 206 into the microphone holder 205, and then fix the diaphragm using the lower clamp 210 and upper clamp 211. At the same time, insert the high-definition speaker 216 into the speaker holder 215. After preparation, according to the test requirements, first adjust the height of the speaker holder 214 and the diaphragm holder 209 using the adjusting connecting plate 212 and the height adjusting bolt 213 with the adjusting plate 208. The limit nut 207 is used to adjust the height of the adjusting plate 208. The height of the diaphragm plate 209 is adjusted, and during the adjustment process, the measuring ruler 218 outside the speaker plate 214 is in the ruler groove 217. The distance between the speaker plate 214 and the diaphragm plate 209 is adjusted. After the adjustment, the microphone holder 205 is adjusted along the microphone support rod 203 and the microphone position adjustment rod 204 according to the change requirements of sound acquisition. Finally, the rubber pad 4 is placed in the limiting groove 3, and the soundproof cover 5 is inserted into the limiting groove 3 to achieve a sealing effect. The data information is then collected in the test data analyzer 1 for analysis. This completes the use process of the diaphragm acoustic FO test device.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A membrane acoustic FO testing device comprising a test data analyzer (1), characterized in that: A diaphragm acoustic FO test assembly (2) is provided on the upper side of the test data analyzer (1). The diaphragm acoustic FO test assembly (2) includes a test platform (201) located at the center of the upper side of the test data analyzer (1). Support bolt rods (202) are connected to the four corner slots of the test platform (201). Microphone support rods (203) are provided in the middle of each support bolt rod (202). Microphone position adjustment rods (204) are connected in the middle of each microphone support rod (203). Microphone holders (205) are provided in the middle of each microphone position adjustment rod (204). High-precision microphones (206) are installed on the inner side of each microphone holder (205). Limit nuts (207) are provided on the upper side of each microphone support rod (203). Adjustment plates are provided on the upper left side of each limit nut (207). (208) A diaphragm holder (209) is provided on the upper side of the high-precision microphone (206). A lower clamp (210) is welded in the middle of the diaphragm holder (209). An adjustment connecting plate (212) is welded on the left side of the lower clamp (210). An adjustment bolt (213) is threaded on the inner side of the end of the adjustment connecting plate (212). A speaker holder (214) is provided on the upper side of the diaphragm holder (209). A speaker bracket (215) is welded in the middle of the speaker holder (214). A high-definition speaker (216) is installed on the inner side of the speaker bracket (215). A ruler groove (217) is provided on the left side of the speaker holder (214). A distance measuring ruler (218) is installed on the inner side of the ruler groove (217). A limit slot (3) is provided on the outer side of the test platform (201).

2. The diaphragm acoustic FO testing device according to claim 1, characterized in that, The microphone support rod (203) and the support bolt rod (202) are connected by a slot. The microphone support rod (203) is arranged symmetrically in two groups on the left and right. The microphone position adjustment rod (204) and the microphone support rod (203) are slidably connected. The microphone holder (205) and the microphone position adjustment rod (204) are connected by a slot. The microphone holder (205), the microphone position adjustment rod (204) and the microphone support rod (203) constitute an angle adjustment structure.

3. The membrane acoustic FO test device of claim 1, wherein, The upper side slot of the lower clip (210) is connected to the upper clip (211), and the upper clip (211) and the lower clip (210) are fixed by screws.

4. The membrane acoustic FO test device of claim 1, wherein, The end of the height adjustment bolt (213) contacts the adjustment plate (208), and the two ends of the diaphragm plate holder (209) are sleeved with the support bolt rod (202). The height adjustment bolt (213) and the adjustment connecting plate (212) work together with the adjustment plate (208) to adjust the height of the diaphragm plate holder (209).

5. The membrane acoustic FO test device of claim 1, wherein, The speaker bracket (214) and the diaphragm bracket (209) are arranged vertically symmetrically, and the speaker bracket (215) and the lower clamp (210) are arranged in concentric circles vertically.

6. The membrane acoustic FO test device of claim 1, wherein, The measuring ruler (218) and the ruler groove (217) are connected by a slot. The end of the measuring ruler (218) is in contact with the diaphragm plate (209). The measuring ruler (218) varies according to the distance between the speaker plate (214) and the diaphragm plate (209).

7. The membrane acoustic FO test device of claim 1, wherein, The inner side of the limiting slot (3) is padded with a rubber pad (4), and a soundproof cover (5) is installed on the upper side of the rubber pad (4). The soundproof cover (5) is made of transparent acrylic sheet.

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