An active noise reduction microphone calibration detection device

Abstract

The application discloses an active noise reduction microphone calibration detection device and relates to the technical field of microphone detection.The device comprises a detection chamber and a microphone main body, the inside of the detection chamber is internally provided with a lifting unit, the lifting unit is internally provided with a current sound detection unit, the lifting unit is used for adjusting the height of the current sound detection unit, the current sound detection unit comprises an annular track which is arranged on the lifting unit, an inner side of the annular track is provided with a track groove, and the inside of the track groove is slidably provided with three first sliding blocks which are arranged in an annular array, one mounting bracket is arranged on each of the first sliding blocks, and an equilateral tripod is movably arranged between the three mounting brackets, and one extension frame is arranged at each of three corners of the equilateral tripod.In the application, the three lateral simulation sound production elements are rotatable in a 360-degree surrounding mode and are independently adjustable in angle, the top simulation sound production unit is combined, flexible sound production quantity control is matched, and full-space accurate detection of the microphone is realized.

Description

Technical Field

[0001] This invention belongs to the field of microphone testing technology, specifically an active noise cancellation microphone calibration and testing device. Background Technology

[0002] Active noise-canceling microphones often suffer from the performance defect of "generating a current noise when speaking to them". This current noise may not come from external interference, but from the microphone itself in the voice input scenario. Due to abnormal diaphragm vibration, poor circuit signal coupling, or mechanical structure resonance when held, periodic low-frequency noise is mixed into the voice signal. This problem not only seriously damages the purity of the voice and reduces the quality of communication and amplification, but also greatly affects the user experience.

[0003] The detection of current noise in active noise-canceling microphones is a core aspect of ensuring microphone performance. Existing detection devices typically use a fixed or single-track simulated sound-generating element to determine whether there is current noise in the microphone. This cannot fully reflect the actual performance of the microphone in use and has problems such as missed defects or insufficient accuracy. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention proposes an active noise cancellation microphone calibration and detection device.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An active noise-canceling microphone calibration and testing device includes a testing chamber and a microphone body. A lifting unit is installed inside the testing chamber, and a current-based acoustic detection unit is mounted on the lifting unit. The lifting unit is used to adjust the height of the current-based acoustic detection unit.

[0007] The current acoustic detection unit includes:

[0008] A circular track is provided on the lifting unit. A track groove is provided on the inner side of the circular track. Three sliders are slidably arranged in a circular array inside the track groove. Each slider is provided with a mounting bracket. An equilateral tripod is movably installed between the three mounting brackets. An extension bracket is provided at each of the three corners of the equilateral tripod.

[0009] Side-mounted simulated sound-emitting elements are respectively installed at the bottom of each of the extension frames, and each of the side-mounted simulated sound-emitting elements and a corresponding extension frame are equipped with a set of angle adjustment components, which are used to adjust the angle of each of the side-mounted simulated sound-emitting elements.

[0010] The top seat is fixedly connected to the extension frame via an assembly frame, and a top simulated sound-generating element is provided on the bottom surface of the assembly frame;

[0011] The rotating assembly, installed inside the testing chamber, is used to drive the rotation of the equilateral tripod.

[0012] As a further preferred embodiment of this technical solution: the current sound detection unit further includes a vibration initiation component, located directly above the circular track, wherein,

[0013] The vibration triggering component includes,

[0014] The annular guide frame is connected to the top surface of the annular track via a third connecting frame. Several sliding grooves are arranged in a circular array on the top surface of the annular guide frame, and a third connecting block is slidably connected inside each sliding groove.

[0015] Arc-shaped protrusions are located on the inner side of the annular guide frame and multiple arc-shaped protrusions are provided. Each arc-shaped protrusion is fixedly connected to the lower end of a No. 3 connecting block, and the longitudinal section of the arc-shaped protrusion is an isosceles triangle.

[0016] The pressure ring is provided with one or more No. 3 connecting blocks whose tops are fixedly connected to the bottom surface of the pressure ring;

[0017] The current acoustic detection unit further includes a vibration frequency adjustment component and a vibration reset component, wherein...

[0018] The vibration reset assembly is provided in multiple sets, and each vibration reset assembly is respectively installed on a mounting bracket;

[0019] The vibration frequency adjustment component is mounted on a circular track to synchronously limit the height of the vibration reset component and the pressure ring.

[0020] As a further preferred embodiment of this technical solution: each set of vibration reset components includes a sliding shaft slidably mounted on the mounting bracket, a second slider is provided at the lower end of the sliding shaft, the second slider is fixedly connected to an equilateral tripod, a ball seat is provided at the upper end of the sliding shaft, and a ball is rolled on the inner side of the ball seat, fitting against the lower part of the arc-shaped protrusion.

[0021] A return spring is also sleeved on the outside of the slide shaft, and a spring seat is also provided on the slide shaft. The two ends of the slide shaft are respectively connected to the spring seat and the mounting bracket.

[0022] As a further preferred embodiment of this technical solution: the vibration frequency adjustment component includes,

[0023] The lifting block has parallel extension rods and a second connecting frame on its top surface.

[0024] A limit block is provided at the upper end of the extension rod, and a limit block is provided at the top of the extension rod, located directly below the second slider;

[0025] The end of the second connecting frame furthest from the lifting block is connected to the pressure ring;

[0026] Furthermore, the lifting block is provided with a through slot for the extension frame to move through;

[0027] It also includes a drive assembly, which includes an electric push rod mounted on the inner wall of the detection chamber via a fixed base, the output end of which is fixedly connected to a lifting block.

[0028] As a further preferred embodiment of this technical solution: the angle adjustment component includes,

[0029] A rotating base is located at the bottom of the extension frame. A rotating shaft is rotatably mounted on the rotating base, and a rotating block is mounted on the rotating shaft for mounting side-mounted simulated sound-emitting elements.

[0030] The drive component is a servo motor, and the output end of the servo motor is fixedly connected to the end of the rotating shaft.

[0031] As a further preferred embodiment of this technical solution: the lifting unit includes,

[0032] The lifting screw is rotatably installed inside the testing chamber, and the testing chamber is equipped with a servo motor for driving the lifting screw to rotate. The lifting screw is threadedly connected to the No. 1 connecting block installed on the side wall of the annular track.

[0033] The guide shaft is fixedly connected inside the testing chamber and arranged parallel to the lifting screw, and the lifting screw is slidably connected to the No. 2 connecting block set on the side wall of the annular track.

[0034] As a further preferred embodiment of this technical solution: the rotating assembly includes,

[0035] A rotating bushing is rotatably mounted on the top surface of the testing chamber, and a servo motor for driving the rotating bushing to rotate is provided on the testing chamber.

[0036] The drive shaft is slidably disposed inside the rotating bushing, and a turntable is provided at the lower end of the drive shaft. The turntable is fixedly connected to the equilateral tripod through a first connecting bracket.

[0037] As a further preferred embodiment of this technical solution: the rotating assembly further includes two limiting strips symmetrically arranged on the side wall of the transmission shaft, which are slidably disposed inside the rotating shaft sleeve.

[0038] As a further preferred embodiment of this technical solution: the annular guide frame has a hollow internal structure and an open bottom surface.

[0039] As a further preferred embodiment of this technical solution: the detection chamber is further provided with a conveying unit, located below the current sound detection unit, wherein,

[0040] The conveying unit includes,

[0041] A linear slide rail is installed on the testing chamber, and three sliders are slidably mounted on the linear slide rail.

[0042] A placement seat is set on slider number three, and a bracket for mounting the microphone body is fixedly installed on the placement seat;

[0043] A lead screw is rotatably mounted on the testing chamber via a bearing seat, and the lead screw is arranged parallel to the linear slide rail. A fourth connecting block is provided on the bottom surface of the placement seat, and the fourth connecting block is threadedly connected to the lead screw. A servo motor for driving the lead screw to rotate is also provided on the testing chamber.

[0044] Compared with the prior art, the beneficial effects of the present invention are:

[0045] 1. In this invention, the 360° rotation and independent angle adjustment of three side simulated sound-emitting elements, combined with the top simulated sound-emitting unit and flexible sound quantity control, achieves accurate full-space microphone detection. Specifically, the side simulated sound-emitting elements are linked to the first slider of the ring track via an equilateral tripod and rotate synchronously around the microphone under the drive of the rotating component. Each side element adjusts its pitch angle by driving the rotation axis through a servo motor, superimposed with the vertical sound emission of the top element, forming all-round coverage. It can control one or more side elements and the top element to emit sound synchronously as needed, for example, to detect a specific sound pickup area individually, or to simulate a multi-sound source scenario with multiple elements working together, solving the problems of incomplete detection coverage and insufficient targeting of existing equipment.

[0046] 2. In this invention, by driving the arc-shaped protrusion downward, the lower half of the arc-shaped protrusion is lower than the bottom surface of the annular guide frame. Then, the arc-shaped protrusion and the top ball of the sliding shaft roll together. With the help of the elastic potential energy of the reset spring, the equilateral tripod and the sound-generating element on it are driven to vibrate up and down at high frequency. This realistically simulates dynamic scenarios such as user movement and shaking, and can capture the intermittent current sound defects of the microphone in actual use, avoiding the omission of dynamic scenario-specific problems by static detection.

[0047] 3. In this invention, the electric push rod of the vibration frequency adjustment component drives the lifting block to adjust the height of the limit block to change the range of motion of the second slider. At the same time, the position of the arc-shaped protrusion on the inner side of the annular guide frame is adjusted, thereby adjusting the vibration amplitude and frequency to adapt to the detection needs of different application scenarios and make the detection results more practically valuable.

[0048] 4. In this invention, the vibration mode during rotation can be selectively switched. When vibration is not enabled, the electric push rod drives the limit block to lift the second slider, fix the equilateral tripod, prevent it from shaking, and ensure that the simulated sound-generating elements on the side and top remain stable during pure rotation detection, thus eliminating mechanical shaking that could interfere with the detection accuracy. Attached Figure Description

[0049] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0050] Figure 2 This is a cross-sectional view of the testing chamber of the present invention;

[0051] Figure 3 This is a schematic diagram of the current sound detection unit of the present invention;

[0052] Figure 4 This is a partial structural schematic diagram of the current acoustic detection unit of the present invention;

[0053] Figure 5 This is a partial structural schematic diagram of the rotating assembly of the present invention;

[0054] Figure 6 This is a schematic diagram of the vibration frequency adjustment component of the present invention;

[0055] Figure 7 This is an enlarged schematic diagram of point A in section 3;

[0056] Figure 8 This is an enlarged schematic diagram of point B in section 3;

[0057] Figure 9 This is an enlarged schematic diagram of point C in section 4;

[0058] Figure 10 This is a partial structural schematic diagram of the vibration triggering component of the present invention.

[0059] Legend: 100, Detection chamber; 200, Lifting unit; 201, Lifting screw; 202, Guide shaft; 203, Connecting block No. 1; 300, Current sound detection unit; 301, Circular track; 302, Track groove; 303, Slider No. 1; 304, Mounting frame; 305, Extension frame; 306, Angle adjustment assembly; 3061, Rotating seat; 3062, Rotating block; 307, Side simulated sound element; 308, Assembly frame; 309, Top seat; 310, Top simulated sound element; 311, Rotating assembly; 3111, Rotating bushing; 3112, Drive shaft; 3113, Turntable; 3114, Limiting strip; 312, Connecting frame No. 1; 313, Fixed seat; 314, Vibration frequency adjustment assembly; 3141. Lifting block; 3142. Extension rod; 3143. Second connecting frame; 3144. Through groove; 3145. Limiting block; 315. Vibration triggering component; 3151. Pressure ring; 3152. Third connecting block; 3153. Arc-shaped protrusion; 3154. Third connecting frame; 3155. Annular guide frame; 3156. Slide groove; 316. Vibration reset component; 3161. Second slider; 3162. Sliding shaft; 3163. Reset spring; 3164. Ball seat; 3165. Rolling ball; 317. Equilateral tripod; 400. Conveying unit; 401. Linear slide rail; 402. Shaft seat; 403. Conveying screw; 404. Third slider; 405. Placement seat; 406. Bracket; 500. Microphone body. Detailed Implementation

[0060] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0061] Please see Figures 1-10This application provides an active noise-canceling microphone calibration and testing device, including a testing chamber 100 and a microphone body 500. A lifting unit 200 is installed inside the testing chamber 100, and a current-sound detection unit 300 is mounted on the lifting unit 200. The lifting unit 200 is used to adjust the height of the current-sound detection unit 300. The current-sound detection unit 300 includes a ring track 301, a side-mounted simulated sound-emitting element 307, a top seat 309, and a rotating assembly 311. The ring track 301 is disposed on the lifting unit 200. The inner side of the track groove 302 is provided with a track groove 302. Three first sliders 303 are slidably arranged in a ring array inside the track groove 302. Each first slider 303 is provided with a mounting bracket 304. An equilateral tripod 317 is movably installed between the three mounting brackets 304. An extension bracket 305 is provided at each of the three corners of the equilateral tripod 317. By setting the extension bracket 305, the distance between the side simulated sound element 307 and the ring track 301 is increased, which can prevent the ring track 301 from accidentally touching the microphone body 500 during the detection process.

[0062] The side-mounted simulated sound element 307 is respectively installed at the bottom end of each of the extension frames 305, and an angle adjustment component 306 is installed between each of the side-mounted simulated sound element 307 and a corresponding extension frame 305, which is used to adjust the angle of each of the side-mounted simulated sound element 307.

[0063] The top seat 309 is fixedly connected to the extension frame 305 via the assembly frame 308, and a top simulated sound element 310 is provided on the bottom surface of the assembly frame 308. It should be noted that the side simulated sound element 307 and the top simulated sound element 310 are the same and are existing products on the market, only differing in installation angle and position. They are used only to simulate the sound produced by a human mouth. When aligned with a microphone, they can detect whether there is a current sound in the microphone. It should also be noted that the center of the top seat 309 is located at the same position as the center of the ring formed by the three side simulated sound elements 307.

[0064] The rotating assembly 311 is installed inside the detection chamber 100 and is used to drive the three number one sliders 303 to slide synchronously inside the track groove 302.

[0065] Specifically, by moving the microphone body 500 directly below the top simulated sound element 310, the electrical hum of the microphone body 500 can be detected by using the stationary side simulated sound elements 307 and 310. Alternatively, the operating modes of the side and top simulated sound elements 307 and 310 can be controlled—either a single top simulated sound element 310, a single side simulated sound element 307, or multiple side simulated sound elements 307 and 310 simultaneously—allowing for comprehensive testing of the microphone body 500. The moving component 311 drives three sliders 303 to slide synchronously inside the track groove 302. Each slider 303 drives the mounting bracket 304 on it to rotate. The mounting bracket 304 drives the extension bracket 305 on the equilateral tripod 317 to rotate. The extension bracket 305 drives the side simulated sound element 307 to rotate around the side of the microphone body 500. At this time, a detection mode of "rotation and surround + multiple working modes" can be formed to detect the microphone body 500. In addition, the angle between the sound outlet of the side simulated sound element 307 and the microphone body 500 can be adjusted by the angle adjustment component 306, which can cover all spatial orientations of the microphone pickup surface.

[0066] Furthermore, the current sound detection unit 300 also includes a vibration initiation component 315, located directly above the annular track 301. The vibration initiation component 315 includes a pressure ring 3151, an arc-shaped protrusion 3153, and an annular guide frame 3155. The annular guide frame 3155 is connected to the top surface of the annular track 301 via a third connecting frame 3154. The top surface of the annular guide frame 3155 is provided with a plurality of sliding grooves 3156 arranged in a circular array. Each of the sliding grooves 3156 is slidably connected to a third connecting block 3152.

[0067] The arc-shaped protrusions 3153 are located inside the annular guide frame 3155 and are provided in multiple ways. Each arc-shaped protrusion 3153 is fixedly connected to the lower end of a third connecting block 3152. It should be noted that the arc-shaped protrusions 3153 are arc-shaped blocks that fit into the inner wall of the annular guide frame 3155, and the longitudinal section of the arc-shaped protrusions 3153 is an isosceles triangle. In order to increase the smoothness, the bottom of the arc-shaped protrusions 3153 is rounded and chamfered.

[0068] One vibration triggering component 315 is provided, and the tops of multiple third connecting blocks 3152 are fixedly connected to the bottom surface of the pressure ring 3151.

[0069] The current sound detection unit 300 further includes a vibration frequency adjustment component 314 and a vibration reset component 316. Multiple sets of vibration reset components 316 are provided, and each vibration reset component 316 is respectively installed on a mounting bracket 304. The vibration frequency adjustment component 314 is installed on a ring track 301 to synchronously limit the height of the vibration reset component 316 and the pressure ring 3151.

[0070] Furthermore, each set of vibration reset components 316 includes a sliding shaft 3162 slidably mounted on the mounting bracket 304. A second slider 3161 is provided at the lower end of the sliding shaft 3162. The second slider 3161 is fixedly connected to the equilateral tripod 317. A ball seat 3164 is provided at the upper end of the sliding shaft 3162. A ball bearing 3165 is rolled on the inner side of the ball seat 3164 and fits against the lower part of the arc-shaped protrusion 3153. It should be noted that by setting the ball seat 3164 and the ball bearing 3165, the direct contact between the top of the sliding shaft 3162 and the arc-shaped protrusion 3153 can be replaced. On the one hand, it can reduce the friction between the materials of the sliding shaft 3162 and the vibration reset component 316, thereby reducing the movement resistance. On the other hand, it can avoid wear between materials.

[0071] A return spring 3163 is also sleeved on the outer side of the slide shaft 3162, and a spring seat is also provided on the slide shaft 3162. The two ends of the slide shaft 3162 are respectively connected to the spring seat and the mounting bracket 304.

[0072] Specifically, after adjusting the relative positions between the arc-shaped protrusions 3153 and the annular guide frame 3155, the rotating assembly 311 can drive the three first sliders 303 to slide synchronously on the inner side of the annular track 301. Consequently, the mounting frame 304 also rotates. The rotation of the mounting frame 304 drives the sliding shaft 3162 on it to rotate. The ball seat 3164 at the top of the sliding shaft 3162 rotates accordingly, and the rolling balls 3165 inside the ball seat 3164 rotate together and sequentially move against the bottom of the multiple arc-shaped protrusions 3153. Utilizing the elastic potential energy of the return spring 3163, the... The sliding shaft 3162 moves up and down relative to the mounting bracket 304 at high frequency, which means it can achieve regular up and down vibration. This, in turn, drives the equilateral tripod 317 to vibrate up and down through the second slider 3161. The equilateral tripod 317 drives the extension bracket 305 on it to vibrate up and down. This means that it drives the side simulated sound element 307 and the top simulated sound element 310 to vibrate during the detection process. This can simulate the dynamic acoustic scenarios such as "user movement and shaking" in actual use, and detect whether there is current noise in the microphone body 500 when speaking or singing.

[0073] Furthermore, the vibration frequency adjustment component 314 includes a lifting block 3141. The top surface of the lifting block 3141 is provided with an extension rod 3142 and a second connecting frame 3143 arranged in parallel. A limit block 3145 is provided at the upper end of the extension rod 3142, and the limit block 3145 is located at the top of the extension rod 3142, directly below the second slider 3161. The end of the second connecting frame 3143 away from the lifting block 3141 is connected to a pressure ring 3151. The lifting block 3141 has a through groove 3144 for the extension frame 305 to move through. It should be noted that the inner radius of the through groove 3144 is larger than the outer radius of the extension frame 305 to avoid contact and resistance. The vibration frequency adjustment component 314 also includes a drive component, which includes an electric push rod mounted on the inner wall of the detection chamber 100 via a fixed base 313. The output end of the electric push rod is fixedly connected to the lifting block 3141.

[0074] Specifically, the electric push rod drives the lifting block 3141 to rise or fall. The lifting block 3141 drives the extension rod 3142 and the second connecting frame 3143 to rise or fall. The extension rod 3142 drives the limiting block 3145 to move below the second slider 3161, thus limiting the movement range of the second slider 3161. More specifically, when the arc-shaped protrusion 3153 is fully retracted into the annular guide frame 3155, the limiting block 3145 pushes the second slider 3161 to its highest point. At this point, the second slider 3161 cannot move, thus enabling... While preventing the side simulated sound element 307 and the top simulated sound element 310 from vibrating, the movement of the second slider 3161 is restricted, which ensures the stability of the side simulated sound element 307 and the top simulated sound element 310 during the rotation detection process. When the arc-shaped protrusion 3153 extends from below the annular guide frame 3155, it increases the vibration during the rotation process, and the extension rod 3142 drives the limiting block 3145 to move downward by a corresponding distance, so that the second slider 3161 has a specified range of movement during the vibration process.

[0075] Furthermore, the angle adjustment component 306 includes a rotating base 3061 and a drive component. The rotating base 3061 is disposed at the bottom of the extension frame 305. A rotating shaft is rotatably disposed on the rotating base 3061. A rotating block 3062 is disposed on the rotating shaft for mounting a side-mounted simulated sound element 307. The drive component is a servo motor, and the output end of the servo motor is fixedly connected to the end of the rotating shaft.

[0076] Specifically, a servo motor drives a rotating shaft to rotate, which in turn drives a rotating block 3062 to rotate. The rotating block 3062 then drives a side-mounted simulated sound element 307 to rotate, which adjusts the angle at which the side-mounted simulated sound element 307 is aligned with the microphone body 500.

[0077] Furthermore, the lifting unit 200 includes a lifting screw 201 and a guide shaft 202. The lifting screw 201 is rotatably disposed inside the detection chamber 100, and a servo motor for driving the lifting screw 201 to rotate is provided on the detection chamber 100. The lifting screw 201 is threadedly connected to a first connecting block 203 disposed on the side wall of the annular track 301.

[0078] The guide shaft 202 is fixedly connected inside the detection chamber 100 and arranged parallel to the lifting screw 201. The guide shaft 202 is slidably connected to the second connecting block set on the side wall of the annular track 301, which plays a limiting and guiding role to prevent the annular track 301 from deviating from the prescribed track.

[0079] Furthermore, the rotating assembly 311 includes a rotating bushing 3111 and a transmission shaft 3112. The rotating bushing 3111 is rotatably mounted on the top surface of the detection chamber 100, and a servo motor for driving the rotating bushing 3111 to rotate is provided on the detection chamber 100. The transmission shaft 3112 is slidably mounted inside the rotating bushing 3111. It should be noted that by setting the rotating bushing 3111 and the transmission shaft 3112 into two sections, the height of the current sound detection unit 300 can be adapted during the up-and-down movement of the current sound detection unit 300. A turntable 3113 is provided at the lower end of the transmission shaft 3112, and the turntable 3113 is fixedly connected to the equilateral tripod 317 through a first connecting bracket 312.

[0080] Specifically, the rotating bushing 3111 and the transmission shaft 3112 are driven to rotate, the transmission shaft 3112 drives the turntable 3113 to rotate, and the turntable 3113 drives the equilateral tripod 317 to rotate through the first connecting frame 312.

[0081] Furthermore, the rotating assembly 311 also includes two limiting strips 3114 symmetrically arranged on the side wall of the transmission shaft 3112, which can drive the transmission shaft 3112 to rotate while the transmission shaft 3112 moves up and down relative to the rotating bushing 3111, and are slidably arranged inside the rotating bushing 3111.

[0082] Furthermore, the annular guide frame 3155 has a hollow interior and an open bottom.

[0083] Furthermore, a conveying unit 400 is also provided on the detection chamber 100, located below the current sound detection unit 300, wherein,

[0084] The conveying unit 400 includes a linear slide rail 401, a conveying screw 403, and a placement seat 405. The linear slide rail 401 is mounted on the detection chamber 100, and a third slider 404 is slidably mounted on the linear slide rail 401. The placement seat 405 is mounted on the third slider 404, and a bracket 406 for mounting the microphone body 500 is fixedly mounted on the placement seat 405. The conveying screw 403 is rotatably mounted on the detection chamber 100 via a bearing seat 402, and the conveying screw 403 is arranged parallel to the linear slide rail 401. A fourth connecting block is provided on the bottom surface of the placement seat 405, and the fourth connecting block is threadedly connected to the conveying screw 403. A servo motor for driving the conveying screw 403 to rotate is also provided on the detection chamber 100.

[0085] Specifically, by driving the lead screw 403 to rotate, and then moving the fourth connecting block, the third slider 404 on the placement seat 405 slides on the linear slide rail 401. After the microphone body 500 is installed on the bracket 406, the bracket 406 is driven to move the microphone body 500 and calibrate it to the designated detection position, which is the annular common center formed with the three side simulated sound elements 307.

[0086] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. An active noise-canceling microphone calibration and testing device, comprising a testing chamber (100) and a microphone body (500), characterized in that, The testing chamber (100) is equipped with a lifting unit (200), on which a current sound detection unit (300) is mounted. The lifting unit (200) is used to adjust the height of the current sound detection unit (300). The current acoustic detection unit (300) includes, A circular track (301) is provided on the lifting unit (200). A track groove (302) is provided on the inner side of the circular track (301). Three first sliders (303) are slidably arranged in a circular array inside the track groove (302). Each first slider (303) is provided with a mounting bracket (304). An equilateral tripod (317) is movably installed between the three mounting brackets (304). An extension bracket (305) is provided at each of the three corners of the equilateral tripod (317). Side-mounted simulated sound-emitting elements (307) are respectively installed at the bottom of each of the extension frames (305), and each of the side-mounted simulated sound-emitting elements (307) and a corresponding extension frame (305) is equipped with a set of angle adjustment components (306) for adjusting the angle of each of the side-mounted simulated sound-emitting elements (307). The top seat (309) is fixedly connected to the extension frame (305) via the assembly frame (308), and the bottom surface of the assembly frame (308) is provided with a top simulated sound element (310). A rotating assembly (311) is installed inside the testing chamber (100) to drive the equilateral tripod (317) to rotate; The current acoustic detection unit (300) also includes a vibration initiation component (315), located directly above the annular track (301), wherein, The vibration triggering component (315) includes, The annular guide frame (3155) is connected to the top surface of the annular track (301) via the third connecting frame (3154). The top surface of the annular guide frame (3155) is provided with a number of sliding grooves (3156) in an annular array. Each sliding groove (3156) is slidably connected to a third connecting block (3152). Arc-shaped protrusions (3153) are located inside the annular guide frame (3155) and multiple arc-shaped protrusions (3153) are provided. Each arc-shaped protrusion (3153) is fixedly connected to the lower end of a third connecting block (3152), and the longitudinal section of the arc-shaped protrusion (3153) is an isosceles triangle. A pressure ring (3151) is provided, and the tops of multiple No. 3 connecting blocks (3152) are all fixedly connected to the bottom surface of the pressure ring (3151); The current sound detection unit (300) further includes a vibration frequency adjustment component (314) and a vibration reset component (316), wherein, Multiple sets of the vibration reset assembly (316) are provided, and each vibration reset assembly (316) is respectively installed on a mounting bracket (304); The vibration frequency adjustment component (314) is mounted on the ring track (301) to synchronously limit the height of the vibration reset component (316) and the pressure ring (3151).

2. The active noise cancellation microphone calibration and testing device according to claim 1, characterized in that, Each vibration reset assembly (316) includes a sliding shaft (3162) slidably mounted on a mounting bracket (304). A second slider (3161) is provided at the lower end of the sliding shaft (3162). The second slider (3161) is fixedly connected to an equilateral tripod (317). A ball seat (3164) is provided at the upper end of the sliding shaft (3162). A ball (3165) is rolled on the inner side of the ball seat (3164) and fits against the lower part of the arc-shaped protrusion (3153). A return spring (3163) is also sleeved on the outside of the slide shaft (3162), and a spring seat is also provided on the slide shaft (3162). The two ends of the slide shaft (3162) are respectively connected to the spring seat and the mounting bracket (304).

3. The active noise cancellation microphone calibration and testing device according to claim 2, characterized in that, The frequency modulation component (314) includes, The lifting block (3141) has an extension rod (3142) and a second connecting frame (3143) arranged in parallel on its top surface. The upper end of the extension rod (3142) is provided with a limiting block (3145), and the top of the extension rod (3142) is provided with a limiting block (3145), located directly below the second slider (3161); The end of the second connecting frame (3143) away from the lifting block (3141) is connected to the pressure ring (3151); Furthermore, the lifting block (3141) is provided with a through slot (3144) through which the extension frame (305) moves. It also includes a drive assembly, which includes an electric push rod mounted on the inner wall of the detection chamber (100) via a mounting base (313), the output end of which is fixedly connected to a lifting block (3141).

4. The active noise cancellation microphone calibration and testing device according to claim 1, characterized in that, The angle adjustment component (306) includes, A rotating base (3061) is provided at the bottom of the extension frame (305). A rotating shaft is rotatably provided on the rotating base (3061), and a rotating block (3062) is provided on the rotating shaft for installing a side-mounted simulated sound element (307). The drive component is a servo motor, and the output end of the servo motor is fixedly connected to the end of the rotating shaft.

5. The active noise cancellation microphone calibration and testing device according to claim 1, characterized in that, The lifting unit (200) includes, The lifting screw (201) is rotatably installed inside the detection chamber (100), and the detection chamber (100) is provided with a servo motor for driving the lifting screw (201) to rotate, and the lifting screw (201) is threadedly connected to the No. 1 connecting block (203) provided on the side wall of the ring track (301); The guide shaft (202) is fixedly connected inside the testing chamber (100) and arranged parallel to the lifting screw (201). The guide shaft (202) is slidably connected to the second connecting block set on the side wall of the ring track (301).

6. The active noise cancellation microphone calibration and testing device according to claim 1, characterized in that, The rotating assembly (311) includes, A rotating bushing (3111) is rotatably mounted on the top surface of the detection chamber (100), and a servo motor for driving the rotating bushing (3111) to rotate is provided on the detection chamber (100). The drive shaft (3112) is slidably disposed inside the rotating bushing (3111), and a turntable (3113) is provided at the lower end of the drive shaft (3112). The turntable (3113) is fixedly connected to the equilateral tripod (317) through the first connecting frame (312).

7. The active noise cancellation microphone calibration and testing device according to claim 6, characterized in that, The rotating assembly (311) also includes two limiting strips (3114) symmetrically arranged on the side wall of the transmission shaft (3112) and slidably disposed inside the rotating bushing (3111).

8. The active noise cancellation microphone calibration and testing device according to claim 1, characterized in that, The annular guide frame (3155) has a hollow interior and an open bottom.

9. The active noise cancellation microphone calibration and testing device according to claim 1, characterized in that, The detection chamber (100) is also equipped with a conveying unit (400), located below the current sound detection unit (300), wherein, The conveying unit (400) includes, A linear slide rail (401) is installed on the detection chamber (100), and a third slider (404) is slidably installed on the linear slide rail (401). A placement base (405) is set on the third slider (404), and a bracket (406) for mounting the microphone body (500) is fixedly set on the placement base (405). The lead screw (403) is rotatably mounted on the testing chamber (100) via the bearing seat (402), and the lead screw (403) is arranged parallel to the linear slide rail (401). A fourth connecting block is provided on the bottom surface of the placement seat (405), and the fourth connecting block is threadedly connected to the lead screw (403). A servo motor for driving the lead screw (403) to rotate is also provided on the testing chamber (100).

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