Composite film loudspeaker diaphragm deformation laser displacement detector

Abstract

The utility model discloses a kind of composite film loudspeaker diaphragm deformation laser displacement detection instruments, belong to loudspeaker detection technical field, this kind of composite film loudspeaker diaphragm deformation laser displacement detection instrument, including patch area and detection area, track between the patch area and detection area is set to connect both, track is provided with conveying slider moving along track, bracket and clamp are installed on conveying slider to realize the fixation to diaphragm.By patching device on the surface of diaphragm pasting reflector, then diaphragm is conveyed backwards, until it is sent to detection area, and diaphragm pasted reflector has good reflectivity, so as to effectively reflect when being detected by deformation laser displacement detection instrument, improve the accuracy of detection;Polarization platform is used to isolate vibration in environment, so as to avoid vibration in environment to influence diaphragm test, guarantee the accuracy of diaphragm test;Protective cover is used to protect internal components, and reduce the reflection of test laser in external environment.

Description

Technical Field

[0001] This utility model belongs to the field of loudspeaker testing technology, specifically relating to a laser displacement detector for composite diaphragm loudspeaker diaphragm deformation. Background Technology

[0002] A speaker composite diaphragm is a diaphragm that overcomes the performance limitations of a single material by combining different materials to achieve superior acoustic characteristics. The performance of the speaker diaphragm directly determines the speaker's transient response, distortion, and frequency response smoothness, and is a key component for improving sound quality. The deformation displacement test of the speaker diaphragm is used to test the vibration and rebound deformation of the diaphragm under working conditions, and is one of the indicators for feedback on the performance of the speaker diaphragm.

[0003] Deformation detection of loudspeaker composite diaphragms can be achieved using the ranging principle of lidar, that is, by measuring the distance using laser triangulation to detect the deformation displacement of the composite diaphragm. However, in practical applications, the material (some materials have rough surfaces) and color (diaphragms are mostly black) of the loudspeaker diaphragm make it difficult for rough materials to reflect light, and the black color also increases light absorption. This makes the surface of many loudspeaker diaphragms have very poor light reflectivity. Traditional lidar devices for detecting diaphragm displacement have low detection accuracy, which directly affects the detection results.

[0004] To address this issue, we designed a laser displacement detector for composite diaphragm loudspeaker diaphragm deformation, providing an alternative technical solution. Utility Model Content

[0005] The purpose of this invention is to provide a laser displacement detector for composite diaphragm loudspeaker diaphragm deformation, so as to solve the problems mentioned in the background art regarding the use of existing loudspeaker testing devices.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a laser displacement detector for diaphragm deformation of a composite diaphragm loudspeaker, comprising a patch area and a detection area, wherein a track is provided between the patch area and the detection area to connect the two, and a conveying slider that moves along the track is provided on the track, wherein a bracket and a clamp are installed on the conveying slider to fix the diaphragm.

[0007] A patching device is provided in the patching area to attach a reflective sheet to the diaphragm surface, and an infrared laser ranging probe is provided in the detection area above the diaphragm insertion position.

[0008] Preferably, the support is provided with a fixed platform with an area larger than the diaphragm, the fixed platform has a cavity in the center, and the top of the fixed platform is provided with a ring array of multiple sets of clamps, the clamps being rigid clamps.

[0009] Preferably, the patching device includes a gantry frame and a patching tray. A patching guide rail is provided on the gantry frame, a patching slider is provided on the patching guide rail, a patching head is provided on the patching slider, and a pneumatic suction cup is installed at the bottom of the patching head.

[0010] Preferably, a protective cover is provided on the detection area to block external vibrations.

[0011] Preferably, the protective cover is provided with an excitation device, which is a loudspeaker voice coil.

[0012] Preferably, the track, bracket, and clamp are all made of alloy steel.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] A reflective sheet is attached to the surface of the diaphragm by a patch attaching device, and then the diaphragm is conveyed backward until it is delivered to the detection area. The diaphragm with the reflective sheet has good reflectivity, thus effectively reflecting light when detected by the deformation laser displacement detector, improving the accuracy of the detection. The protective cover is used to isolate the diaphragm from vibration in the environment, thereby preventing the vibration from affecting the diaphragm test and ensuring the accuracy of the diaphragm test. It also protects the internal components, stabilizes the test environment, and reduces the reflection of the test laser in the external environment. Attached Figure Description

[0015] Figure 1 This is a top view of the present invention;

[0016] Figure 2 This is a schematic diagram of the fixture assembly structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the patch device structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the protective cover of this utility model.

[0019] In the diagram: 1. Track; 2. Conveyor slider; 3. Patch placement device; 4. Protective cover; 5. Support; 6. Fixture; 7. Clamp; 8. Cavity; 9. Gantry; 10. Patch tray; 11. Patch placement guide rail; 12. Patch placement slider; 13. Patch placement head; 14. Pneumatic suction cup; 15. Infrared laser rangefinder; 16. Excitation device. Detailed Implementation

[0020] 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.

[0021] Reference Figure 1-4 A laser displacement detector for diaphragm deformation of a composite diaphragm loudspeaker includes a patch area and a detection area. A track 1 is provided between the patch area and the detection area to connect the two. A conveying slider 2 that moves along the track 1 is provided on the track 1. A bracket 5 and a clamp 7 are installed on the conveying slider 2 to fix the diaphragm.

[0022] A patching device 3 is provided in the patching area to attach a reflective sheet to the diaphragm surface. An infrared laser rangefinder 15 is provided in the detection area above the diaphragm insertion position.

[0023] This solution provides a laser displacement detector for the deformation of a loudspeaker composite diaphragm, used for detecting the deformation of the diaphragm. The detector includes a patching area and a detection area. The patching area is equipped with a patching device 3 for attaching a reflective sheet to the center of the diaphragm, and the detection area is used to detect the deformation of the diaphragm.

[0024] The diaphragm is fixed and installed by the bracket 5 and the clamp 7. The bracket 5 is fixed on the conveying slider 2. The conveying slider 32 first conveys the diaphragm to the bottom of the patching device. The patching device 3 then patches a reflective sheet on the surface of the diaphragm. The diaphragm is then conveyed backward until it is delivered to the detection area. The diaphragm with the reflective sheet has good reflectivity, so it can effectively reflect light when detected by the deformation laser displacement detector, thus improving the accuracy of the detection.

[0025] Furthermore, a fixed platform 6 with an area larger than the diaphragm is provided on the support 5. A cavity 8 is opened in the center of the fixed platform 6. Multiple sets of clamps 7 are arranged in a ring array on the top of the fixed platform 6. The clamps 7 are rigid clamps 7.

[0026] Through this technical solution, a fixed platform 6 is set on the support 5. The bearing area of ​​the fixed platform 6 is significantly larger than the diaphragm area to be processed below it, providing a spacious and stable support foundation for the entire system. The central area of ​​the fixed platform 6 is not a solid structure. At the same time, the support 5 is set on both sides of the bottom of the fixed platform 6, with a through cavity 8 or a cavity of a certain depth, so that the lower part of the cavity 8 is suspended and does not form an obstruction, thus reserving room for the deformation of the diaphragm and reducing weight. On the plane of the top of the fixed platform 6, multiple sets of clamps 7 are precisely arranged in a ring array around its center (usually corresponding to the edge area of ​​the central cavity 8) to ensure a firm, accurate and non-loose fixing force during the clamping process. The rigid clamps 7 avoid resonance during diaphragm testing and reduce the influence of errors during the testing process.

[0027] Furthermore, the patch assembly 3 includes a gantry frame 9 and a patch tray 10. A patch guide rail 11 is provided on the gantry frame 9, a patch slider 12 is provided on the patch guide rail 11, a patch press head 13 is provided on the patch slider 12, and a pneumatic suction cup 14 is installed at the bottom of the patch press head 13.

[0028] In this technical solution, the gantry 9 spans across the work area, providing a rigid support frame. A patch guide rail 11 is mounted on the horizontal beam of the gantry 9. The patch slider 12 is precisely mounted on the patch guide rail 11 and driven by a servo motor or stepper motor, enabling precise positioning and smooth movement along the X-axis. A pressing head 13 is vertically mounted on the patch slider 12, serving as the main vertical drive element, and can move up and down along the Z-axis. At the end of the pressing head 13 (i.e., its bottom execution end), a pneumatic suction cup 14 is connected. This suction cup generates negative pressure through a vacuum generator or vacuum pump to adsorb and release reflective patches during the mounting process. The patch is located below or to one side of the device. The reflective tray 10 is used to hold and position the reflective patch to be attached, which is then picked up by the pneumatic suction cup 14. After the pneumatic suction cup 14 picks up the reflective patch, it is moved above the diaphragm by the patch slider 12 and the pressing head 13, thereby attaching the reflective patch to the upper surface of the diaphragm. It should be noted that when attaching the patch to the diaphragm, the patch coordinates need to be set to be exactly at the center of the diaphragm to ensure the accuracy of deformation detection. At the same time, the pressing height of the pressing head 13 should not exceed the bottom surface of the diaphragm, and the pressing pressure should be controlled to gently press the reflective patch to avoid damaging the resilience of the diaphragm during the patching process, which would damage the diaphragm performance, directly leading to distorted detection data and affecting the accuracy of the detection.

[0029] Furthermore, a protective cover 4 is installed on the testing area to isolate external vibrations.

[0030] The protective cover 4 is used to isolate vibrations in the environment, thereby preventing environmental vibrations from affecting the diaphragm test and ensuring the accuracy of the diaphragm test; it is also used to protect internal components, stabilize the test environment, and reduce the reflection of the test laser in the external environment.

[0031] Furthermore, an excitation device 16 is provided inside the protective cover 4, and the excitation device 16 is a loudspeaker voice coil.

[0032] When the vibration driven by the conveyor slider 32 reaches the test area, the excitation device 16 connects with the test diaphragm from the cavity 8 of the bracket 5. The excitation device 16 can be selected with the speaker voice coil of this model. The speaker voice coil is activated to cause the diaphragm to vibrate and deform. At this time, the infrared laser ranging probe 15 located above emits laser light. The diaphragm effectively reflects the light using the attached reflector, thereby reflecting the test laser back to the photoelectric measuring device in the infrared laser ranging probe 15, thereby testing the deformation of the diaphragm during the vibration process.

[0033] Furthermore, track 1, bracket 5, and clamp 7 are all made of alloy steel.

[0034] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In the description of this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this invention, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, those skilled in the art can combine different embodiments or examples and features of different embodiments or examples described in this invention without contradiction.

[0036] 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 laser displacement detector for composite diaphragm loudspeaker diaphragm deformation, characterized in that: It includes a patching area and a testing area, and a track (1) connecting the patching area and the testing area is provided. A conveying slider (2) that moves along the track (1) is provided on the track (1). A bracket (5) and a clamp (7) are installed on the conveying slider (2) to fix the diaphragm. A patching device (3) is provided in the patching area to attach a reflective sheet to the diaphragm surface. An infrared laser ranging probe (15) is provided in the detection area above the diaphragm insertion position.

2. The composite diaphragm loudspeaker diaphragm deformation laser displacement detector according to claim 1, characterized in that: The bracket (5) is provided with a fixed platform (6) with an area larger than the diaphragm. The fixed platform (6) has a cavity (8) in the center. The top of the fixed platform (6) is provided with a ring array of multiple clamps (7). The clamps (7) are rigid clamps (7).

3. The laser displacement detector for composite diaphragm loudspeaker diaphragm deformation according to claim 1, characterized in that: The patch device (3) includes a gantry (9) and a patch tray (10). A patch guide rail (11) is provided on the gantry (9). A patch slider (12) is provided on the patch guide rail (11). A patch press head (13) is provided on the patch slider (12). A pneumatic suction cup (14) is installed at the bottom of the patch press head (13).

4. The laser displacement detector for composite diaphragm loudspeaker diaphragm deformation according to claim 1, characterized in that: A protective cover (4) is provided on the detection area to block external vibrations.

5. The laser displacement detector for composite diaphragm loudspeaker diaphragm deformation according to claim 4, characterized in that: The protective cover (4) is equipped with an excitation device (16), which is a loudspeaker voice coil.

6. The laser displacement detector for composite diaphragm loudspeaker diaphragm deformation according to claim 1, characterized in that: The track (1), bracket (5) and clamp (7) are all made of alloy steel.

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