Integrated testing device of microphone

Abstract

The utility model discloses an integrated testing device of a microphone. The integrated testing device comprises a cabinet body; the control mechanism is arranged in the cabinet body and comprises a controller, a sound card and a power amplifier, the controller is electrically connected with the sound card and the power amplifier, and the sound card is electrically connected with the power amplifier; the measuring mechanism is arranged on the first surface of the cabinet body, a test fixture and a broadband loudspeaker are arranged in an isolation test box of the measuring mechanism, the test fixture is electrically connected with the sound card and the power amplifier, the broadband loudspeaker is electrically connected with the power amplifier, and an airtight reference microphone on the test fixture is electrically connected with the sound card. Excitation signals of different frequency bands, different octaves and different sound pressure levels are generated through the sound card, corresponding audio signals are generated through the test jig to carry out frequency response test, airtight test is carried out through the airtight reference microphone and the broadband loudspeaker, the test cost is low, the test efficiency is high, and the method can be widely applied to the technical field of microphone measurement.

Description

Technical Field

[0001] The utility model relates to the technical field of microphone measurement, in particular to an integrated testing device for a microphone. Background Art

[0002] After the microphone is manufactured, its performance needs to be tested, including frequency response test and airtightness test. The frequency response test mainly tests the microphone's response to frequency, harmonic distortion, etc. In the existing technology, the frequency response test of the microphone uses a standard sound source to provide an audio signal. The audio signal cannot meet the test conditions of the full frequency band (100HZ-10kHz), different octaves and different sound pressure levels, and the test range is small. The airtightness test of the microphone mainly tests the microphone's sound receiving path to eliminate defective products such as sound leakage due to broken welding rings or sound leakage from the microphone itself. In the existing technology, these two tests cannot be performed at the same time, and different test devices are required to perform the tests separately, which results in high testing costs and low testing efficiency. Utility Model Content

[0003] In view of this, the purpose of an embodiment of the present invention is to provide an integrated testing device for a microphone, which can provide audio signals of full frequency band, different octaves and different sound pressure levels to test the microphone, and can simultaneously perform frequency response testing and airtightness testing on the microphone, with low testing cost and high testing efficiency.

[0004] In a first aspect, an embodiment of the present invention provides an integrated microphone testing device, comprising:

[0005] Cabinet;

[0006] A control mechanism is disposed in the cabinet and includes a controller, a sound card, and a power amplifier. The controller is electrically connected to the sound card and the power amplifier, respectively. The sound card is used to generate excitation signals of different frequency bands, different octaves, and different sound pressure levels. The power amplifier is used to amplify the excitation signals.

[0007] A measuring mechanism is provided on the first surface of the cabinet, the measuring mechanism is provided with an isolated test box, the isolated test box is provided with a test fixture and a wide-band speaker, the test fixture is used to test the microphone to be tested, the test fixture is electrically connected to the sound card and the power amplifier respectively, the wide-band speaker is electrically connected to the power amplifier, and the test fixture is provided with an airtight reference microphone, and the airtight reference microphone is electrically connected to the sound card.

[0008] Optionally, the test jig includes a jig plate and a pressing fixture, the pressing fixture is rotatably connected to the test jig, and the pressing fixture is used to fix the position of the microphone to be tested.

[0009] Optionally, a groove is provided on the first surface of the jig plate, and the groove is used to place the microphone to be tested. The pressing and fixing member includes a first pressing plate and a second pressing plate. The second pressing plate is provided with an elastic member, and the elastic member is used to fix the microphone to be tested in the groove. The first pressing plate is used to fix the pogo module connected to the microphone to be tested.

[0010] Optionally, the groove is provided with a standard microphone, and the second surface of the jig plate is provided with a speaker, and the standard microphone is used to calibrate the speaker.

[0011] Optionally, the measuring mechanism is provided with a plurality of identical isolation test boxes, each of which includes an upper cover and a base, wherein the base is rotatably connected to the upper cover, and the test fixture and the wide-band speaker are both provided on the base.

[0012] Optionally, a locking assembly is provided between the upper cover and the base, and the locking assembly is used to lock the upper cover and the base together.

[0013] Optionally, the integrated testing device for the microphone further includes a display mechanism, which is disposed on the cabinet and electrically connected to the controller.

[0014] Optionally, the display mechanism includes a connecting rod and a display, a first end of the connecting rod is fixedly connected to the first surface of the cabinet, and a second end of the connecting rod is fixedly connected to the display.

[0015] Optionally, a plurality of heat dissipation fans are provided on the cabinet, and the heat dissipation fans are electrically connected to the controller.

[0016] Optionally, the second surface of the cabinet is provided with a plurality of universal wheels and retractable support rods, and the universal wheels and the retractable support rods are arranged opposite to each other.

[0017] The implementation of the embodiments of the present invention includes the following beneficial effects: The embodiments of the present invention provide an integrated testing device for a microphone, comprising: a cabinet; a control mechanism, wherein the control mechanism is arranged in the cabinet, the control mechanism includes a controller, a sound card and a power amplifier, the controller is electrically connected to the sound card and the power amplifier respectively, the sound card is used to generate excitation signals of different frequency bands, different octaves and different sound pressure levels, and the power amplifier is used to amplify the excitation signal; a measuring mechanism, arranged on the first surface of the cabinet, the measuring mechanism is provided with an isolated test box, a test fixture and a wide-band speaker are provided in the isolated test box, the test fixture is used to test the microphone to be tested, the test fixture is electrically connected to the sound card and the power amplifier respectively, the wide-band speaker is electrically connected to the power amplifier, and an airtight reference microphone is provided on the test fixture, and the airtight reference microphone is electrically connected to the sound card. The sound card generates excitation signals of different frequency bands, different octaves, and different sound pressure levels, so that the test fixture generates corresponding audio signals to perform frequency response testing on the microphone under test. The airtightness test of the microphone under test is also performed using an airtight reference microphone and a wide-band speaker, which reduces test costs and improves test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of an integrated microphone testing device provided by an embodiment of the present utility model;

[0019] Figure 2 This is a schematic structural diagram of an isolation test box provided by an embodiment of the present utility model;

[0020] Figure 3 This is another structural schematic diagram of the isolation test box provided by an embodiment of the present utility model.

[0021] Reference numerals: cabinet 100 , cooling fan 110 , sound card 120 , power amplifier 130 , controller 140 , universal wheel 150 , retractable support rod 160 ;

[0022] Isolation test box 200, upper cover 210, wide-band speaker 220, base 230, fixture plate 240, microphone to be tested 250, first pressing piece 260, second pressing piece 270, elastic member 271, airtight reference microphone 280, pogo module 290;

[0023] Display 300 and connecting rod 310. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0026] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, unless otherwise specified, "plurality" means two or more.

[0027] Reference Figure 1-2 The present invention provides an integrated microphone testing device, comprising:

[0028] Cabinet 100;

[0029] A control mechanism is disposed within the cabinet 100 and includes a controller 140, a sound card 120, and a power amplifier 130. The controller 140 is electrically connected to the sound card 120 and the power amplifier 130, respectively. The sound card 120 is configured to generate excitation signals of different frequency bands, different octaves, and different sound pressure levels, and the power amplifier 130 is configured to amplify the excitation signals.

[0030] A measuring mechanism is provided on the first surface of the cabinet 100. The measuring mechanism is provided with an isolated test box 200. A test fixture and a wide-band speaker 220 are provided in the isolated test box 200. The test fixture is used to test the microphone 250 to be tested. The test fixture is electrically connected to the sound card 120 and the power amplifier 130 respectively. The wide-band speaker 220 is electrically connected to the power amplifier 130. An airtight reference microphone 280 is provided on the test fixture, and the airtight reference microphone 280 is electrically connected to the sound card 120.

[0031] It should be noted that the controller 140 of the present invention adopts the existing control method.

[0032] Specifically, the integrated microphone test device can simultaneously perform frequency response testing and airtightness testing of the microphone. The entire test device is integrated, occupies a small area, and is convenient and quick to test, with low testing costs and high testing efficiency. The integrated microphone test device consists of a cabinet 100, a control mechanism, and a measuring mechanism; the control mechanism is disposed within the cabinet 100 and includes a controller 140, a sound card 120, and a power amplifier 130. The controller 140 is electrically connected to the sound card 120 and the power amplifier 130, respectively. The controller 140 drives the sound card 120 and the power amplifier 130 to operate, and receives information from the sound card 120 for corresponding processing. The controller 140 drives the sound card 120 to generate excitation signals of different frequency bands, different octaves and different sound pressure levels, and the power amplifier 130 amplifies the excitation signals. The measuring mechanism is set on the first surface of the cabinet 100. The measuring mechanism includes an isolation test box 200 for testing the microphone 250 to be tested. The isolation test box 200 is provided with a test fixture and a wide-band speaker 220. The test fixture places the microphone 250 to be tested and tests the microphone 250 to be tested. The test fixture is electrically connected to the sound card 120 and the power amplifier 130 respectively. The test fixture receives the excitation signal and generates a corresponding audio signal to test the microphone to be tested, meeting the test conditions of full frequency band, different octaves and different sound pressure levels, and sends the test electrical signal to the sound card 120. The sound card 120 processes the electrical signal and sends it to the controller 140, thereby testing the frequency response of the microphone to be tested. The wide-band speaker 220 is electrically connected to the power amplifier 130, and an airtight reference microphone 280 is provided on the test fixture. The airtight reference microphone 280 receives the audio signal from the wide-band speaker 220 and sends the converted electrical signal to the sound card 120, thereby testing the airtightness of the microphone to be tested by comparing the electrical signal of the microphone to be tested with the electrical signal of the airtight reference microphone 280, with low test cost and high test efficiency.

[0033] In some optional embodiments, the test fixture includes a fixture plate 240 and a pressing fixture, wherein the pressing fixture is rotatably connected to the test fixture and is used to fix the position of the microphone 250 to be tested.

[0034] Specifically, refer to Figure 2-3 The pressing fixture is rotatably arranged on the jig plate 240 , and the microphone to be tested 250 is pressed in the groove by rotation and the position of the test microphone is fixed, so as to better perform the test.

[0035] In some optional embodiments, the first surface of the jig plate 240 is provided with a groove, and the groove is used to place the microphone to be tested 250. The pressing and fixing member includes a first pressing plate 260 and a second pressing plate 270. The second pressing plate 270 is provided with an elastic member 271, and the elastic member 271 is used to fix the microphone to be tested 250 in the groove. The first pressing plate 260 is used to fix the pogo module 290 connected to the microphone to be tested 250.

[0036] Specifically, refer to Figure 2 The first surface of the jig plate 240 is provided with a testing groove that matches the test assembly. The groove is used to place the microphone 250 to be tested and the pogo (spring pin) module connected to the test microphone. The pressing fixture includes a first pressing piece 260 and a second pressing piece 270. The first pressing piece 260 fixes the pogo module 290 in the groove. The second pressing piece 270 is provided with an elastic member 271, which presses the microphone 250 to be tested, thereby minimizing damage to the microphone 250 to be tested. The pogo (spring pin) module sends the electrical signal of the microphone to be tested to the sound card 120.

[0037] In some optional embodiments, the groove is provided with a standard microphone, and the second surface of the jig plate 240 is provided with a speaker, and the standard microphone is used to calibrate the speaker.

[0038] Specifically, a standard microphone is set in the groove near the microphone to be tested, and the speaker is calibrated by the standard microphone, so that the speaker emits audio signals with corresponding different frequency bands, different octaves and different sound pressure levels.

[0039] In some optional embodiments, the measuring mechanism is provided with a plurality of identical isolation test boxes 200, the isolation test box 200 includes an upper cover 210 and a base 230, the base 230 is rotatably connected to the upper cover 210, and the test fixture and the wide-band speaker 220 are both arranged on the base 230.

[0040] Specifically, refer to Figure 1-3 By setting up multiple isolation test boxes 200, multiple microphones 250 to be tested can be tested with high test efficiency. The isolation test boxes 200 prevent unnecessary interference during testing. The isolation test box 200 includes a top cover 210 and a base 230. The test fixture and wide-band speaker 220 are placed on the base 230 for testing. The top cover 210 is rotatably connected to the base 230, making it easy to remove and place the microphones to be tested, making testing convenient.

[0041] In some optional embodiments, a locking assembly is provided between the upper cover 210 and the base 230 , and the locking assembly is used to lock the upper cover 210 and the base 230 together.

[0042] Specifically, refer to Figure 2-3 The upper cover 210 and the base 230 are locked by a locking assembly provided between the upper cover 210 and the base 230 to seal the space of the isolated test box 200, thereby protecting the test from unnecessary interference and achieving a good test effect.

[0043] In some optional embodiments, the integrated testing device for the microphone further includes a display mechanism, which is disposed on the cabinet 100 and is electrically connected to the controller 140 .

[0044] Specifically, the display mechanism receives the display information sent by the controller 140 , thereby displaying specific test data, performing the test in a visual manner, and achieving good test results.

[0045] In some optional embodiments, the display mechanism includes a connecting rod 310 and a display 300 , wherein a first end of the connecting rod 310 is fixedly connected to the first surface of the cabinet 100 , and a second end of the connecting rod 310 is fixedly connected to the display 300 .

[0046] Specifically, refer to Figure 1 The first end of the connecting rod 310 is fixedly connected to the first surface of the cabinet 100, and the second end of the connecting rod 310 is fixedly connected to the display 300, so that the display 300 is integrated with the testing device to reduce space occupation.

[0047] In some optional embodiments, a plurality of heat dissipation fans 110 are provided on the cabinet 100 , and the heat dissipation fans 110 are electrically connected to the controller 140 .

[0048] Specifically, refer to Figure 1 The heat dissipation fan 110 dissipates heat to the controller 140, the sound card 120 and the power amplifier 130 in the cabinet 100, thereby ensuring their working stability and reducing damage accidents caused by high temperature.

[0049] In some optional embodiments, the second surface of the cabinet 100 is provided with a plurality of universal wheels 150 and retractable support rods 160 , and the universal wheels 150 and the retractable support rods 160 are arranged opposite to each other.

[0050] Specifically, refer to Figure 1 The plurality of universal wheels 150 allow the test device to be freely moved and conveniently moved, and the retractable support rod 160 stabilizes the test device to prevent the test device from moving.

[0051] The implementation of the embodiment of the present invention includes the following beneficial effects: The embodiment of the present invention provides an integrated test device for a microphone, comprising: a cabinet 100; a control mechanism, wherein the control mechanism is arranged in the cabinet 100, the control mechanism comprises a controller 140, a sound card 120 and a power amplifier 130, the controller 140 is electrically connected to the sound card 120 and the power amplifier 130 respectively, the sound card 120 is used to generate excitation signals of different frequency bands, different octaves and different sound pressure levels, and the power amplifier 130 is used to amplify the excitation signals. No.; a measuring mechanism is arranged on the first surface of the cabinet 100, and the measuring mechanism is provided with an isolation test box 200, and a test jig and a wide-band speaker 220 are provided in the isolation test box 200, and the test jig is used to test the microphone 250 to be tested, and the test jig is electrically connected to the sound card 120 and the power amplifier 130 respectively, and the wide-band speaker 220 is electrically connected to the power amplifier 130, and an airtight reference microphone 280 is provided on the test jig, and the airtight reference microphone 280 is electrically connected to the sound card 120. The sound card 120 generates excitation signals of different frequency bands, different octaves and different sound pressure levels, so that the test jig generates corresponding audio signals to perform frequency response testing on the microphone to be tested, and the airtightness test of the microphone to be tested is performed through the airtight reference microphone 280 and the wide-band speaker 220, so that the test cost is low and the test efficiency is high.

[0052] Throughout this specification, references to the term "in a specific embodiment" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0053] The above is a specific description of the preferred implementation of the present invention, but the invention of the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An integrated testing device for a microphone, characterized in that: include: Cabinet; A control mechanism, the control mechanism is arranged in the cabinet, the control mechanism comprises a controller, a sound card and a power amplifier, the controller is electrically connected to the sound card and the power amplifier respectively, the sound card is used to generate excitation signals of different frequency bands, different octaves and different sound pressure levels, and the power amplifier is used to amplify the excitation signal; A measuring mechanism is arranged on the first surface of the cabinet, the measuring mechanism is provided with an isolation test box, a test fixture and a wide-band speaker are arranged in the isolation test box, the test fixture is used to test the microphone to be tested, the test fixture is electrically connected to the sound card and the power amplifier respectively, the wide-band speaker is electrically connected to the power amplifier, and an airtight reference microphone is arranged on the test fixture, and the airtight reference microphone is electrically connected to the sound card.

2. The integrated testing device for microphone according to claim 1, characterized in that: The test fixture comprises a fixture plate and a pressing fixture, wherein the pressing fixture is rotatably connected to the test fixture and is used to fix the position of the microphone to be tested.

3. The integrated testing device for microphone according to claim 2, characterized in that: The first surface of the jig plate is provided with a groove, and the groove is used to place the microphone to be tested. The pressing and fixing member includes a first pressing plate and a second pressing plate. The second pressing plate is provided with an elastic member, and the elastic member is used to fix the microphone to be tested in the groove. The first pressing plate is used to fix the pogo module connected to the microphone to be tested.

4. The integrated testing device for microphone according to claim 3, characterized in that: The groove is provided with a standard microphone, and the second surface of the fixture plate is provided with a speaker, and the standard microphone is used to calibrate the speaker.

5. The integrated testing device for microphone according to claim 1, characterized in that: The measuring mechanism is provided with a plurality of identical isolation test boxes, wherein the isolation test boxes include an upper cover and a base, wherein the base is rotatably connected to the upper cover, and the test fixture and the wide-band speaker are both arranged on the base.

6. The integrated testing device for microphone according to claim 5, characterized in that: A locking assembly is provided between the upper cover and the base, and the locking assembly is used to lock the upper cover and the base together.

7. The integrated testing device for microphone according to claim 1, characterized in that: The integrated testing device for the microphone further comprises a display mechanism, wherein the display mechanism is arranged on the cabinet and is electrically connected to the controller.

8. The integrated testing device for microphone according to claim 7, characterized in that: The display mechanism comprises a connecting rod and a display, wherein a first end of the connecting rod is fixedly connected to a first surface of the cabinet, and a second end of the connecting rod is fixedly connected to the display.

9. The integrated testing device for microphone according to claim 1, characterized in that: A plurality of heat dissipation fans are arranged on the cabinet, and the heat dissipation fans are electrically connected to the controller.

10. The integrated testing device for microphone according to claim 1, characterized in that: The second surface of the cabinet is provided with a plurality of universal wheels and a retractable support rod, and the universal wheels and the retractable support rod are arranged opposite to each other.

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