Microphone system testing device

Abstract

The utility model relates to a microphone system testing arrangement, including base, is respectively installed with microphone positioning clamping mechanism, antenna communication device, visual inspection mechanism and VPC auxiliary control module on the base, microphone positioning clamping mechanism includes the support block one, support block two of interval fixed on the base, still include the slide rail module group fixed along the arrangement direction of support block one and support block two, and the flat push type clamp is installed on the slide rail module group. The base still integrative installation has VPC auxiliary control module, and VPC auxiliary control module and flat push type clamp electrically connected, are used for providing power, control signal for flat push type clamp. Therefore, can realize the fast accurate positioning of clamp and external test workstation. Can ensure the relative position accuracy of the measured product positioning clamping mechanism, antenna communication device etc. The measured product positioning clamping mechanism is adapted through the trapezoidal foolproof boss of support block two and the measured product foolproof recess, and the installation direction error is prevented from the source.

Description

Technical Field

[0001] This utility model relates to a testing device, and more particularly to a microphone system testing device. Background Technology

[0002] In the microphone production testing process, the stability, positioning accuracy, and functional integration of the test fixture directly affect testing efficiency and data reliability. With the development of (wireless) microphone technology, performance testing not only needs to ensure the stability of the mechanical clamping but also needs to consider the accuracy of wireless signal coupling and the simultaneous detection of appearance defects. However, existing testing equipment often suffers from functional fragmentation and low integration. For example, currently used microphone testing fixtures, while involving microphone positioning structures, achieve foolproof positioning through limiting slots separating the upper and lower plates. Furthermore, they are primarily designed for acoustic signal transmission and do not integrate the antenna board components required for wireless coupling testing, nor do they incorporate multi-dimensional visual inspection mechanisms, thus failing to meet the comprehensive testing needs of mass production.

[0003] Meanwhile, referring to current rotary clamping mechanisms that can integrate a light source, which use grippers to clamp and integrate the light source function, this mechanism is primarily designed for rotational operation. It lacks a dual positioning structure with a foolproof boss and a tightening screw, and it lacks a precise pneumatic clamping force adjustment mechanism suitable for microphone testing, making it difficult to ensure the stability of the distance between the microphone and the antenna board during wireless coupling testing. Furthermore, in most clamping mechanisms, the power control module is separate from the clamp body, resulting in messy wiring and occupying additional space, which is detrimental to the integrated layout of the test bench and reduces the convenience of equipment maintenance.

[0004] During implementation, existing visual inspection modules, primarily based on cameras, require complex adjustments to their mounting positions, making them unsuitable for the inspection needs of different microphone models. For example, commonly used microphone appearance inspection devices achieve one-dimensional camera movement via linear guides, which cannot meet multi-angle inspection requirements. Furthermore, the positioning of fixtures and test tables often relies on direct bolt fixing, which is time-consuming to install and disassemble and has low repeatability, affecting batch testing efficiency.

[0005] In view of the above-mentioned shortcomings, the designer has actively researched and innovated in order to create a microphone system testing device that has greater industrial application value. Utility Model Content

[0006] To address the aforementioned technical problems, the purpose of this utility model is to provide a microphone system testing device.

[0007] This utility model discloses a microphone system testing device, comprising a base, wherein: a microphone positioning and clamping mechanism, an antenna communication device, a visual inspection mechanism, and a VPC auxiliary control module are respectively mounted on the base; the microphone positioning and clamping mechanism includes a first support block and a second support block fixed at intervals on the base, and a slide rail module fixed along the arrangement direction of the first and second support blocks, wherein a flat-push clamp is mounted on the slide rail module, and the clamping end of the flat-push clamp is threadedly connected to a tightening screw; the second support block has anti-foolproof bosses distributed on it; the visual inspection mechanism includes an adjustment bracket, on which a camera body is mounted; the antenna communication device includes an antenna board protective cover, within which an antenna board is installed; the base also integrates and mounts a VPC auxiliary control module, which is electrically connected to the flat-push clamp and is used to provide power and control signals to the flat-push clamp.

[0008] Furthermore, in the aforementioned microphone system testing device, the first support block and the second support block cooperate to form a microphone support surface, and the flat-push clamp slides along the slide rail module to clamp the microphone toward the antenna communication device.

[0009] Furthermore, in the aforementioned microphone system testing device, the camera body slides in conjunction with the adjustment bracket, and the adjustment bracket is equipped with guide structures in the up-down, left-right, and front-back directions to achieve multi-directional position adjustment of the camera body.

[0010] Furthermore, in the aforementioned microphone system testing device, the VPC auxiliary control module includes distributed air tube interfaces, which are located on the side of the base and communicate with the internal air passage of the VPC auxiliary control module; the VPC auxiliary control module is connected to the flat-push clamp via the air tubes to provide pneumatic driving force for the flat-push clamp.

[0011] Furthermore, in the aforementioned microphone system testing device, a mounting base is installed on the bottom of the base, the mounting base has multiple positioning pin holes, and the mounting base is fixedly connected to the base by bolts.

[0012] Furthermore, in the aforementioned microphone system testing device, the antenna plate protective cover has elastic buffer pads distributed on the side facing the microphone, and the elastic buffer pads are attached to the end face of the antenna plate protective cover.

[0013] Furthermore, in the aforementioned microphone system testing apparatus, the distance between the lens of the camera body and the upper surface of the microphone is 60 to 80 mm; the distance between the bottom surface of the microphone and the surface of the antenna plate is 12 to 18 mm.

[0014] Furthermore, in the aforementioned microphone system testing device, the distance between the lens of the camera body and the upper surface of the microphone is 70mm; the distance between the bottom surface of the microphone and the surface of the antenna plate is 14mm.

[0015] Furthermore, in the aforementioned microphone system testing device, the adjustment bracket is detachably connected to the base via bolts.

[0016] Furthermore, in the aforementioned microphone system testing device, the antenna board has a plurality of pins distributed on it, and the pins are connected to the antenna board protective cover; the antenna board protective cover is connected to the base by fixing screws.

[0017] By means of the above solution, this utility model has at least the following advantages: 1. The one-piece molded base provides a high-strength load-bearing foundation, and with the positioning pin hole on the bottom, it can achieve rapid and accurate positioning of the fixture and the external test workbench. At the same time, the pre-set threaded holes and positioning grooves on the upper surface of the base provide a unified assembly benchmark for various functional mechanisms, ensuring the relative positional accuracy of the positioning and clamping mechanism of the tested object, antenna communication device, etc., which can avoid the displacement of the entire fixture or some parts during the test and ensure the stability of test data.

[0018] 2. The test item positioning and clamping mechanism uses the trapezoidal anti-mistaken groove on support block two to match the test item's anti-mistaken groove, eliminating incorrect installation orientation from the outset. After initial clamping with the flat-push clamp, the tightening screw further eliminates gaps, forming a reliable fixing mode. Simultaneously, the silicone buffer pads on the inner side of the clamping block and the elastic buffer pads on the antenna board protective cover prevent scratches and damage to the test item caused by excessive clamping force or hard contact, improving positioning consistency in batch testing and protecting the test item's integrity.

[0019] 3. By using pin-positioned antenna plates, the distance between the microphone and the antenna plate can be effectively controlled. The visual inspection mechanism, through adjustable bracket mounting, allows for precise control of the distance between the lens and the microphone. It can accommodate microphones of different sizes and specifications for testing, covering multiple testing needs without changing the main fixture body.

[0020] 4. The VPC auxiliary control module integrates a pneumatic solenoid valve, a pressure regulating valve, and a control circuit board. The clamping force can be flexibly adjusted according to the type of microphone being used via a pressure adjustment knob, preventing damage from over-clamping or loosening from under-clamping. The quick-connect air hose on the side of the base and the heat dissipation and dustproof structure in the VPC module mounting cavity simplify air source connection and equipment maintenance procedures, extend the lifespan of the control module, and reduce long-term operation and maintenance costs.

[0021] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the microphone system testing device.

[0023] Figure 2 This is a schematic diagram of the distribution structure of support block one and support block two.

[0024] The meanings of the labels in the figures are as follows.

[0025] 1. Base; 2. VPC auxiliary control module; 3. Support block one; 4. Support block two; 5. Slide rail module; 6. Flat-push type clamps; 7. Tighten the screws; 8. Anti-mistake protrusions; 9. Antenna board protective cover; 10. Antenna board; 11. Adjust the support bracket; 12. Camera body; 13. Microphone. Detailed Implementation The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0026] like Figures 1 to 2The microphone system testing device includes a base, which is unique in that, to ensure stable mounting, the base is made of 6061 aluminum alloy and CNC-milled into a single piece. Its overall shape is a rectangular plate, with multiple threaded holes and positioning grooves on the upper surface for mounting various mechanisms, ensuring precise positioning. A mounting plate can be fitted to the bottom of the base, fitting perfectly against the lower surface. The two are secured together by four evenly distributed hexagonal bolts along the edge of the base. Simultaneously, two rows of positioning pin holes are formed along the length and width of the mounting plate. These positioning pins can engage with corresponding pin holes on an external testing platform, enabling rapid positioning and fixation of the entire fixture on the platform, preventing overall displacement during testing. Furthermore, a rectangular mounting opening is provided on the side of the base, communicating with a pre-reserved mounting cavity inside the base for embedding and mounting a VPC auxiliary control module. A sealing strip is provided at the edge of the mounting opening to prevent external dust or liquids from entering the mounting cavity and affecting the operation of the VPC auxiliary control module.

[0027] According to a preferred embodiment of this utility model, the microphone positioning and clamping mechanism is used to achieve precise positioning and reliable clamping of the microphone. It includes a support block one, a support block two, a slide rail module, a flat-push clamp, and a tightening screw. Specifically, support block one and support block two are both rectangular block structures, and can also be made of SUS304 stainless steel with polished surfaces to reduce the coefficient of friction. During assembly, support block one and support block two are fixed at intervals along the length of the base, with the interval matching the length of the microphone. Simultaneously, the upper surfaces of both are machined to the same plane using a grinding machine, forming a support surface for supporting the microphone. Among them, the upper surface of support block two, near the microphone positioning side, has an integrally formed anti-misplacement boss. The anti-misplacement boss has a trapezoidal cross-section with a height of 5mm and a width of 8mm. The position of the anti-misplacement boss perfectly matches the pre-set anti-misplacement groove on the bottom of the microphone. When the microphone is installed in the wrong direction, the anti-misplacement boss will interfere with the edge of the microphone, preventing the microphone from being placed stably on the support surface, thus ensuring unique positioning.

[0028] Looking further, the slide rail module is fixed to the upper surface of the base along the arrangement direction of support blocks one and two, i.e., the length direction of the base. Specifically, it includes a guide rail body, a slider, and a dust cover. The guide rail body is fixed to the positioning groove of the base by four hexagonal socket head cap screws, with the bolt heads embedded in the countersunk holes of the guide rail body to avoid interfering with the slider's movement. Simultaneously, the slider slides onto the guide rail body, and a ball bearing retainer is provided between the slider and the guide rail body to reduce sliding friction and improve sliding accuracy. During assembly, the dust cover adopts an accordion-style structure, with its two ends fixed to the end face of the slider and the end of the guide rail body, respectively, to prevent dust or impurities from entering the mating gap between the guide rail body and the slider, extending the service life of the slide rail module. Furthermore, the bottom of the flat-push clamp is fixedly connected to the slider of the slide rail module by bolts, and a 0.1mm thick copper foil shim can be placed between the connecting surfaces to eliminate assembly gaps and ensure synchronous movement of the flat-push clamp and the slider. The sliding clamp features an L-shaped clamping block at its gripping end, with a 3mm thick silicone cushioning pad attached to the inside of the clamping block to prevent scratching the microphone surface during clamping. Furthermore, a tightening screw with a Torx head is threaded into the threaded hole at the clamping end of the sliding clamp, allowing for easy tightening with a Torx wrench. A circular rubber pad with anti-slip texture is glued to the end of the tightening screw. After the sliding clamp initially clamps the microphone, turning the tightening screw clockwise causes the rubber pad to make tight contact with the side of the microphone, further tightening the microphone. This continues until the gap between the microphone and support blocks one and two is eliminated, ensuring the microphone does not loosen or shift during testing.

[0029] In practical implementation, the antenna communication device includes an antenna board protective cover, an antenna board, pins, and fixing screws. Specifically, the antenna board protective cover is a rectangular box structure with one open end, which can be injection molded from ABS engineering plastic. Its open end faces the microphone positioning and clamping mechanism, and the closed end is fixed to the upper surface of the base by fixing screws. The interior of the antenna board protective cover forms a rectangular mounting cavity, the size of which is adapted to the outer dimensions of the antenna board. Two pins are provided along the diagonal direction on the inner wall of the mounting cavity, and the axis of the pins is perpendicular to the bottom surface of the antenna board protective cover. Meanwhile, the antenna board used in this invention is a rectangular PCB board with coupling antenna elements soldered to its surface. Two pin holes matching the pins are opened at the diagonal position of the antenna board. During assembly, the antenna board is placed into the mounting cavity of the antenna board protective cover, the pins are inserted into the pin holes of the antenna board, and the pins pass through the gap between the pins and the pin holes, achieving precise positioning of the antenna board within the mounting cavity.

[0030] Furthermore, to achieve a secure connection, four Phillips head pan screws are used for fixing. These screws correspond to the countersunk holes at the four corners of the antenna board protective cover. The screws pass sequentially through the countersunk holes in the antenna board protective cover and the fixing holes on the edge of the antenna board, finally tightening into the threaded holes on the base. This securely locks the antenna board and the antenna board protective cover together, preventing displacement of the antenna board due to vibration during testing. Simultaneously, an elastic buffer pad is attached to the open end of the antenna board protective cover facing the microphone using double-sided adhesive. Its shape matches the open end of the antenna board protective cover. When the microphone is clamped, the elastic buffer pad prevents hard contact between the microphone and the antenna board protective cover, while also providing a certain degree of sealing, reducing the impact of external interference on the coupling test.

[0031] During use, after the microphone is accurately positioned and clamped as the test object, the distance between the bottom surface of the microphone and the surface of the antenna plate needs to be controlled within the range of 12 to 18 mm. In this embodiment, 14 mm is preferred. This distance is calculated by the height of support block one and support block two, which is 14 mm minus the thickness of the antenna plate. A distance calibration scale can be provided on the upper surface of the base, allowing for periodic calibration of the distance using a dedicated caliper.

[0032] Looking further, the visual inspection mechanism is used to acquire images of the microphone's appearance and detect defects in appearance or assembly. The adjustable bracket is detachably connected to the upper surface of the base via four hexagonal bolts with threaded holes. The bolt holes are oblong, allowing for fine-tuning of the overall position of the adjustable bracket during installation to adapt to different testing scenarios. Specifically, the adjustable bracket structure includes a vertical rod, a horizontal rod, and a slide. The vertical rod is fixed to the base, and a guide groove is formed along its height, containing a T-shaped slider. Simultaneously, one end of the horizontal rod is fixed to the T-shaped slider, while the other end extends horizontally, with another guide groove along its length containing a second T-shaped slider. During assembly, the slide is fixed to the second T-shaped slider, and a third guide groove is formed on the slide perpendicular to the horizontal rod. The camera body is fixed to the slider within the third guide groove via bolts. Each of the three guide rails mentioned above is equipped with a locking knob. After the camera body is adjusted to the target position, tightening the locking knob will fix the camera body, thereby enabling position adjustment of the camera body in the up / down, left / right, and forward / backward directions. For ease of implementation, a commercially available product with a similar structure can be purchased for the adjustment bracket, reducing the difficulty of implementation.

[0033] Meanwhile, this camera body adopts an industrial CMOS camera with a fixed-focus lens, preferably with a focal length of 16mm. The optical axis of the lens is perpendicular to the upper surface of the microphone to ensure distortion-free image acquisition. The Type-C interface is fixed to the side of the vertical rod of the adjustment bracket. The power pin of the Type-C interface is connected to the power interface of the camera body via a wire, and the data pin is connected to the USB interface of the camera body, which can simultaneously provide power to the camera body and transmit image data without the need for additional power and data cables, simplifying the wiring structure. Furthermore, to ensure image acquisition clarity, the distance between the lens of the camera body and the upper surface of the microphone needs to be controlled within the range of 60 to 80mm, preferably 70mm in this embodiment. This distance is adjusted by adjusting the height of the vertical rod of the adjustment bracket and the position of the horizontal rod and the slide. The vertical rod of the adjustment bracket is engraved with height markings, allowing direct reading of the distance between the lens and the upper surface of the base. Combined with the height of the microphone, the distance between the lens and the upper surface of the microphone is calculated, ensuring precise distance adjustment.

[0034] During implementation, the VPC auxiliary control module is integrated into the mounting cavity inside the base. Its main function is to provide power and control signals to the push-pull clamp, ensuring stable and reliable clamping action. Specifically, the pneumatic solenoid valve and pressure regulating valve are connected in series via air pipes. The input end of the pressure regulating valve is connected to an external air source, and the output end is connected to the air circuit interface of the push-pull clamp via an air pipe. Simultaneously, the air pipe interface is located on the side of the base, and the external air pipe is connected to the air pipe interface via a quick connector. This allows for tool-free plugging and unplugging, facilitating equipment maintenance. Furthermore, the control circuit board integrates a microcontroller and relays. The control circuit board is electrically connected to the coil of the push-pull clamp via wires, and can output PWM control signals to control the on / off state of the pneumatic solenoid valve, thereby realizing the extension (clamping) and retraction (releasing) actions of the push-pull clamp. Moreover, the control circuit board also has an aviation connector interface, which can be connected to an external industrial control computer to receive external control commands and provide feedback on the working status (clamping / releasing) of the push-pull clamp.

[0035] For ease of use, the VPC auxiliary control module features a pressure adjustment knob with engraved pressure markings. This allows adjustment of the pneumatic drive force according to the microphone's structure and material, preventing damage to the microphone due to excessive clamping force or loosening due to insufficient clamping force. The mounting cavity of the VPC auxiliary control module has ventilation holes on the side, each equipped with a dust filter. This ensures heat dissipation while preventing dust from entering, thus avoiding malfunctions of the control circuit board due to overheating or dust accumulation.

[0036] The working principle of this utility model is as follows: First, install and position the fixture, aligning the positioning pin holes on the mounting base with the positioning pins on the external test bench. Insert the positioning pins into the pin holes, and then use bolts to fix the mounting base to the bench, completing the overall positioning of the fixture. Connect the external air source through the air pipe interface and the external industrial control computer through the aviation connector, checking that all interface connections are secure.

[0037] Next, install the microphone. Align the bottom anti-foolproof groove of the microphone system with the anti-foolproof protrusion of support block two. Place the microphone steadily on the support surfaces of support block one and support block two, ensuring that the side of the microphone is flush with the positioning surfaces of support block one and support block two without any obvious gaps.

[0038] Next, the microphone is clamped. A "clamp" command can be sent from an external industrial control computer. Upon receiving the command, the control circuit board of the VPC auxiliary control module energizes the pneumatic solenoid valve. Compressed air from an external air source, after being regulated by a pressure regulating valve, enters the air chamber of the push-type clamp through an air tube. This pushes the clamp along the slide rail module towards the microphone until the silicone buffer pad of the clamping block contacts the side of the microphone. At this point, use a box wrench to turn the tightening screw clockwise until the rubber pad is in tight contact with the side of the microphone and you feel significant resistance, completing the complete clamping of the microphone. The clamping force can be confirmed to meet the set requirements via the pressure sensor signal fed back from the external industrial control computer.

[0039] Next, adjust the visual inspection mechanism. During this process, loosen the locking knobs of each guide slide of the adjustment bracket, and adjust the T-shaped slider on the vertical rod vertically to achieve a distance of 70mm between the camera lens and the upper surface of the microphone. Confirm the distance using the height scale on the vertical rod. Adjust the second T-shaped slider on the horizontal rod horizontally to align the lens with the microphone's inspection area. Adjust the slider on the slide block horizontally back and forth to ensure the lens is in focus. After adjustment, tighten all locking knobs to fix the camera's position. Then, start the camera via the Type-C interface to acquire an image of the microphone's appearance. The image data is transmitted to an external industrial control computer via the Type-C interface for defect detection by the computer's image analysis software.

[0040] During testing, the distance between the microphone's bottom surface and the antenna board surface was confirmed to be 14mm, and the external wireless testing equipment was activated. Then, the test signal was transmitted through the coupling between the antenna board and the microphone to complete the wireless performance test. Finally, the test data was transmitted to an external industrial computer for recording via the wireless testing equipment.

[0041] After the test, a "Release" command is sent via an external industrial control computer. The VPC auxiliary control module de-energizes the pneumatic solenoid valve, venting the air chamber of the push-type clamp. Under the action of the return spring, the push-type clamp slides in the opposite direction along the slide rail module, disengaging from the microphone. A box wrench can be used to turn the tightening screw counterclockwise to separate the rubber pad from the side of the microphone. Finally, the microphone is removed from the support surface and inspected for damage. A "Reset" command is sent via the external industrial control computer, and the VPC auxiliary control module restores all components to their initial state, preparing for the next test.

[0042] Furthermore, the directions or positional relationships described in this utility model are based on the directions or positional relationships shown in the accompanying drawings. They are only for the purpose of facilitating the description of this utility model and simplifying the description, and are not intended to indicate or imply that the device or structure referred to must have a specific orientation, or to operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A microphone system testing device, comprising a base, characterized in that: The base is equipped with a microphone positioning and clamping mechanism, an antenna communication device, a visual inspection mechanism, and a VPC auxiliary control module. The microphone positioning and clamping mechanism includes a support block 1 and a support block 2 fixed at intervals on the base, and also includes a slide rail module fixed along the arrangement direction of the support block 1 and the support block 2. A flat-push clamp is installed on the slide rail module, and the clamping end of the flat-push clamp is threaded with a tightening screw; anti-fooling bosses are distributed on the support block 2. The visual inspection mechanism includes an adjustment bracket on which a camera body is mounted. The antenna communication device includes an antenna board protective cover, and an antenna board is installed inside the antenna board protective cover; The base also integrates a VPC auxiliary control module, which is electrically connected to the push clamp and is used to provide power and control signals to the push clamp.

2. The microphone system testing device according to claim 1, characterized in that: The first support block and the second support block cooperate to form a microphone support surface. The flat-push clamp slides along the slide rail module to clamp the microphone toward the antenna communication device.

3. The microphone system testing device according to claim 1, characterized in that: The camera body slides in conjunction with the adjustment bracket, which is equipped with guide structures in the up-down, left-right, and front-back directions to achieve multi-directional position adjustment of the camera body.

4. The microphone system testing device according to claim 1, characterized in that: The VPC auxiliary control module includes distributed air pipe interfaces, which are located on the side of the base and communicate with the internal air passage of the VPC auxiliary control module; the VPC auxiliary control module is connected to the push clamp via air pipes to provide pneumatic driving force for the push clamp.

5. The microphone system testing apparatus according to claim 1, characterized in that: The base has a mounting plate installed at its bottom. The mounting plate has multiple positioning pin holes and is fixedly connected to the base by bolts.

6. The microphone system testing apparatus according to claim 1, characterized in that: The antenna plate protective cover has elastic buffer pads distributed on the side facing the microphone, and the elastic buffer pads are attached to the end face of the antenna plate protective cover.

7. The microphone system testing apparatus according to claim 1, characterized in that: The distance between the lens of the camera body and the upper surface of the microphone is 60 to 80 mm; the distance between the bottom surface of the microphone and the surface of the antenna plate is 12 to 18 mm.

8. The microphone system testing apparatus according to claim 7, characterized in that: The distance between the lens of the camera body and the upper surface of the microphone is 70mm; the distance between the bottom surface of the microphone and the surface of the antenna plate is 14mm.

9. The microphone system testing apparatus according to claim 1, characterized in that: The adjustment bracket is detachably connected to the base by bolts.

10. The microphone system testing apparatus according to claim 1, characterized in that: The antenna board has several pins distributed on it, and the pins are connected to the antenna board protective cover; the antenna board protective cover is connected to the base by fixing screws.

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