CN114245283B - Method and system for testing microphone waterproof by sound - Google Patents
Method and system for testing microphone waterproof by sound Download PDFInfo
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- CN114245283B CN114245283B CN202111510876.7A CN202111510876A CN114245283B CN 114245283 B CN114245283 B CN 114245283B CN 202111510876 A CN202111510876 A CN 202111510876A CN 114245283 B CN114245283 B CN 114245283B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000012360 testing method Methods 0.000 title claims abstract description 14
- 230000005236 sound signal Effects 0.000 claims abstract description 266
- 238000001514 detection method Methods 0.000 claims abstract description 219
- 238000007789 sealing Methods 0.000 claims abstract description 161
- 230000002159 abnormal effect Effects 0.000 claims abstract description 37
- 238000003466 welding Methods 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims description 47
- 238000005286 illumination Methods 0.000 claims description 35
- 238000004078 waterproofing Methods 0.000 claims description 15
- 238000004364 calculation method Methods 0.000 claims description 9
- 238000004458 analytical method Methods 0.000 claims description 4
- 238000010998 test method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/004—Monitoring arrangements; Testing arrangements for microphones
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- Examining Or Testing Airtightness (AREA)
Abstract
The application discloses a waterproof method and system for testing microphone by sound, which relates to the technical field of microphone detection, and the method comprises the following steps: sealing a pickup hole in the annular bonding pad on the microphone through a sealing unit; transmitting a detection sound signal to the sound pick-up hole through a sound transmitting module; after the sound sending module sends the detection sound signal, judging whether the microphone receives the detection sound signal through the pickup hole; if the microphone receives the detection sound signal through the pickup hole, judging that the sealing welding of the annular bonding pad of the microphone is normal; and if the microphone does not receive the detection sound signal through the pickup hole, judging that the sealing and welding of the annular bonding pad of the microphone are abnormal. This application has the higher effect of detection efficiency that detects the microphone.
Description
Technical Field
The present disclosure relates to microphone detection technology, and in particular, to a method and system for testing microphone waterproofing by sound.
Background
Consumers have a demand for waterproofing of more and more outdoor products, and waterproofing of MIC (microphone) has been changed from a conventional rubber packing ring structure to a 360 degree annular pad sealing structure with the development of advanced manufacturing technology, and meanwhile, directionality of sound is ensured by such a structure. And the detection of whether the MIC (microphone) of the product is well sealed to the waterproof index and the sound directivity requirement usually requires the use of an airtight detection method.
With respect to the related art in the above, the inventors consider that there are the following drawbacks: when the microphone is detected by the airtight detection method, the microphone is required to be placed in the detection device, the pressure in the device is slowly increased, the pressure is maintained for not less than 30 minutes after the pressure reaches the specified test pressure, and then the pressure is reduced to the design pressure, so that the tightness of the annular bonding pad on the microphone is detected, and when the number of the microphones required to be detected is large, the detection efficiency by the airtight detection method is low.
Disclosure of Invention
In order to improve the defect of low detection efficiency of detecting the microphone, the application provides a method and a system for testing microphone waterproofing by sound.
In a first aspect, the present application provides a method of testing microphone waterproofing with sound, comprising the steps of:
Sealing a pickup hole in the annular bonding pad on the microphone through a sealing module;
transmitting a detection sound signal to the sound pick-up hole through a sound transmitting module;
after the sound sending module sends the detection sound signal, judging whether the microphone receives the detection sound signal through the pickup hole;
if the microphone receives the detection sound signal through the pickup hole, judging that the sealing welding of the annular bonding pad of the microphone is normal;
and if the microphone does not receive the detection sound signal through the pickup hole, judging that the sealing and welding of the annular bonding pad of the microphone are abnormal.
By adopting the technical scheme, the microphone receives the sound signal through the sound pickup hole, the sound pickup hole is sealed, then a specific detection sound signal is sent around the microphone, if the microphone still can receive the detection sound signal through the sound pickup hole at this time, the annular bonding pad at the periphery of the sound pickup hole is unsealed, the detection sound signal reaches the sound pickup hole from the unsealed position of the annular bonding pad, and the unsealed position of the annular bonding pad is poor in waterproof; if the microphone cannot receive a specific detection sound signal or only receives a detection sound signal deformed by a propagation medium, it means that the annular bonding pad around the sound pick-up hole is sealed well, and the detection sound signal cannot directly reach the sound pick-up hole through the annular bonding pad, so that the annular bonding pad has good waterproof property. The waterproof performance of the microphone can be detected by using the sound through the steps, compared with the detection flow of the airtight detection method, the waterproof performance detection method is convenient and quick, the detection time consumption is less, and the detection efficiency is higher when a plurality of microphone products are detected.
Optionally, the determining whether the microphone receives the detected sound signal through the sound pickup hole includes the following steps:
acquiring standard frequency and standard amplitude of the detected sound signal through the sound transmission module;
generating a frequency threshold based on the standard frequency and an amplitude threshold based on the standard amplitude;
acquiring a comprehensive sound signal received by the microphone through the pickup hole;
analyzing the integrated sound signal to obtain integrated frequency and integrated amplitude of the integrated sound signal;
judging whether the comprehensive frequency is smaller than the frequency threshold value;
if the integrated frequency is smaller than the frequency threshold, judging that the integrated sound signal is not the detection sound signal, wherein the microphone does not receive the detection sound signal;
if the integrated frequency is not less than the frequency threshold, judging whether the integrated amplitude is less than the amplitude threshold;
if the integrated amplitude is not smaller than the amplitude threshold, judging that the integrated sound signal is the detection sound signal, and receiving the detection sound signal by the microphone;
and if the integrated amplitude is smaller than the amplitude threshold, judging that the integrated sound signal is not the detection sound signal, wherein the microphone does not receive the detection sound signal.
By adopting the technical scheme, if the detected sound signal is directly received by the microphone because the annular bonding pad is not sealed, the signal attenuation generated by the detected sound signal under the short-distance air transmission is negligible; if the detected sound signal is transmitted to the microphone through solid media such as a sealing unit or an annular bonding pad, the amplitude and the frequency of the detected sound signal are attenuated due to different transmission media, so that the standard frequency and the standard amplitude can be obtained when the detected sound signal is transmitted, a frequency threshold value and an amplitude threshold value are generated based on the standard frequency and the standard amplitude and also an attenuation formula, the integrated frequency and the integrated amplitude of the integrated sound signal received by the microphone are analyzed, the integrated frequency and the frequency threshold value are compared, the integrated amplitude and the amplitude threshold value are compared, and when the two data exceed or are equal to the threshold value, the integrated sound signal received by the microphone can be judged to be the detected sound signal sent by the sound transmission module; when any one data does not exceed the threshold value, the integrated sound signal received by the microphone is judged not to be the original detection sound signal.
Optionally, the determining whether the microphone receives the detected sound signal through the sound pickup hole includes the steps of:
Calculating the shortest distance from the sound sending module to the microphone;
calculating a first propagation time based on the shortest distance, the first propagation time being a time required for a sound signal to propagate from the sound transmission module to the microphone;
acquiring the transmission time of the detection sound signal through the sound transmission module;
acquiring the receiving time of the microphone for receiving the comprehensive sound signal through the pick-up hole;
calculating a second propagation time from the transmission time and the reception time;
judging whether the second propagation time is identical to the first propagation time;
if the second propagation time is the same as the first propagation time, determining that the integrated sound signal is the detection sound signal, and the microphone receives the detection sound signal;
and if the second propagation time is different from the first propagation time, judging that the comprehensive sound signal is not the detection sound signal, wherein the microphone does not receive the detection sound signal.
By adopting the technical scheme, when the sound signal is detected to be transmitted from the sound transmitting module to the microphone, if the sound signal is transmitted through the air in the whole course, the transmission time is the first transmission time calculated according to the shortest distance; if the propagation medium comprises air and solids, the propagation time will exceed the first propagation time. Therefore, according to the sending time of the detection sound signal by the sound sending module and the receiving time of the integrated sound signal received by the microphone, the second propagation time in the actual complete propagation process can be calculated, whether the first propagation time and the second propagation time are the same or not is compared, if so, the integrated sound signal received by the microphone is the original detection sound signal; if the signals are different, the integrated sound signal received by the microphone is not the original detection sound signal.
Optionally, the sealing the pick-up hole in the annular bonding pad on the microphone by the sealing module includes the following steps:
the control sealing module blocks a pickup hole in the annular bonding pad on the microphone;
detecting the tightness of the sealing module to the pick-up hole to obtain a detection result;
judging whether the tightness is abnormal according to the detection result;
if the tightness is abnormal, driving force to the sealing module is increased, wherein the driving force is used for driving the sealing unit to block the pick-up hole;
if the sealability is not abnormal, the driving force is not adjusted.
By adopting the technical scheme, the sealing module is driven by the driving force and blocks the pickup hole on the microphone, so that the tightness of the sealing unit to the pickup hole is required to be detected for the sake of rigor of waterproof detection, and if the tightness is abnormal, the driving force to the sealing module is required to be increased, so that the tightness to the pickup hole is enhanced by the sealing module; if the tightness is normal, the driving force does not need to be adjusted, so that the influence of the sealing problem of the sealing module on the detection result of the waterproof detection is avoided.
Optionally, the detecting the tightness of the sealing module to the pick-up hole, and obtaining the detection result includes the following steps:
Acquiring illumination intensity of the sealing module in the pick-up hole;
judging whether the illumination intensity is lower than a preset light intensity threshold value or not;
if the illumination intensity is lower than the light intensity threshold, a first detection result is obtained, wherein the first detection result is that the sealing performance of the sealing module on the pick-up hole is normal;
and if the illumination intensity is not lower than the light intensity threshold, obtaining a second detection result, wherein the second detection result is that the sealing performance of the sealing module on the pick-up hole is abnormal.
By adopting the technical scheme, when the sealing module is sealed in the sound pick-up hole, the sound pick-up hole and the sealing module form a fully sealed space, so that the illumination intensity in the fully sealed space can be detected, the illumination intensity is judged by combining with a preset light intensity threshold value, and when the illumination intensity exceeds or is equal to the threshold value, the light source enters, and the sealing is abnormal; and if the sealing value does not exceed the threshold value, the sealing is normal, and the tightness detection is passed.
In a second aspect, the present application also provides a system for waterproofing a microphone with sound, comprising:
the sealing module is used for sealing a pickup hole positioned in the annular bonding pad on the microphone;
a sound transmitting module for transmitting a detection sound signal to the sound pickup hole;
The signal receiving module is arranged on the microphone and connected with the sound pick-up hole, and is used for receiving the detection sound signal through the sound pick-up hole after the sound sending module sends the detection sound signal;
the judging module is used for judging whether the annular bonding pad of the microphone is normally sealed and welded according to the receiving condition of the signal receiving module on the detection sound signal;
when the signal receiving module receives the detection sound signal, judging that the sealing welding of the annular bonding pad of the microphone is normal;
and when the signal receiving module does not receive the detection sound signal, judging that the sealing and welding of the annular bonding pad of the microphone are abnormal.
By adopting the technical scheme, the sound pick-up hole is sealed through the sealing module, then a specific detection sound signal is sent around the microphone through the sound sending module, if the microphone still can receive the detection sound signal through the sound pick-up hole and the signal receiving module at the moment, the annular bonding pad at the periphery of the sound pick-up hole is unsealed, the detection sound signal reaches the sound pick-up hole from the unsealed position of the annular bonding pad and is received by the signal receiving module, and the annular bonding pad is unsealed, so that the waterproof performance is poor; if the signal receiving module cannot receive the specific detection sound signal or can only receive the detection sound signal deformed due to different propagation mediums at this time, it indicates that the annular bonding pad on the periphery of the pick-up hole is sealed well, and the detection sound signal cannot directly reach the pick-up hole through the annular bonding pad, so that the annular bonding pad has good waterproof property. The waterproof performance of the microphone can be detected by using the sound through the steps, compared with the detection flow of the airtight detection method, the waterproof performance detection method is convenient and quick, the detection time consumption is less, and the detection efficiency is higher when a plurality of microphone products are detected.
Optionally, the determining module includes:
the information acquisition unit is connected with the sound transmission module and is used for acquiring the standard frequency and the standard amplitude of the detection sound signal sent by the sound transmission module;
a threshold generating unit, configured to generate a frequency threshold according to the standard frequency, and generate an amplitude threshold according to the standard amplitude;
the signal analysis unit is used for acquiring the comprehensive sound signal received by the signal receiving module and analyzing the comprehensive sound signal to obtain the comprehensive frequency and the comprehensive amplitude of the comprehensive sound signal;
the first judging unit is used for judging whether the comprehensive frequency is smaller than the frequency threshold value, if the comprehensive frequency is smaller than the frequency threshold value, the judgment result is that the comprehensive sound signal is not the detection sound signal, the signal receiving module does not receive the detection sound signal, and the annular bonding pad of the microphone is abnormal in sealing and welding;
a second judging unit configured to judge whether the integrated amplitude is smaller than the amplitude threshold when the first judging unit judges that the integrated frequency is not smaller than the frequency threshold;
if the comprehensive amplitude is not smaller than the amplitude threshold, judging that the comprehensive sound signal is the detection sound signal, wherein the signal receiving module receives the detection sound signal, and the annular bonding pad of the microphone is normally sealed and welded;
If the integrated amplitude is smaller than the amplitude threshold, the integrated sound signal is not the detection sound signal, the signal receiving module does not receive the detection sound signal, and the annular bonding pad of the microphone is abnormal in sealing and welding.
By adopting the technical scheme, if the detected sound signal is directly received by the microphone because the annular bonding pad is not sealed, the signal attenuation generated by the detected sound signal under the short-distance air transmission is negligible; if the detection sound signal propagates to the microphone through a solid medium such as a sealing unit or a ring pad, the amplitude and frequency of the detection sound signal are attenuated by the propagation medium.
Therefore, the standard frequency and the standard amplitude when the detected sound signal is transmitted can be obtained through the information obtaining unit, the threshold generating unit generates a frequency threshold value and an amplitude threshold value based on the standard frequency and the standard amplitude and also an attenuation formula, the signal analyzing unit analyzes the comprehensive frequency and the comprehensive amplitude of the comprehensive sound signal received by the microphone, the comprehensive frequency and the frequency threshold value are compared through the first judging unit, the comprehensive amplitude and the amplitude threshold value are compared through the second judging unit, and when the two data exceed or are equal to the threshold value, the comprehensive sound signal received by the microphone can be judged to be the detected sound signal sent by the sound sending module; when any one data does not exceed the threshold value, the integrated sound signal received by the microphone is judged not to be the original detection sound signal.
Optionally, the determining module includes:
a measuring and calculating unit, configured to measure and calculate the shortest distance between the sound sending module and the microphone;
a first calculation unit configured to calculate a first propagation time, which is a time required for a sound signal to propagate from the sound transmission module to the microphone, according to the shortest distance;
the time acquisition unit is respectively connected with the sound transmission module and the signal receiving module and is used for acquiring the transmission time of the sound transmission module for transmitting the detection sound signal and the receiving time of the signal receiving module for receiving the comprehensive sound signal;
a second calculation unit configured to calculate a second propagation time from the transmission time and the reception time;
a third judging unit configured to judge whether the second propagation time is the same as the first propagation time;
if the second propagation time is the same as the first propagation time, judging that the comprehensive sound signal is the detection sound signal, wherein the microphone receives the detection sound signal, and the annular bonding pad of the microphone is abnormal in sealing and welding;
if the second propagation time is different from the first propagation time, the judgment result is that the comprehensive sound signal is not the detection sound signal, the microphone does not receive the detection sound signal, and the annular bonding pad of the microphone is normally sealed and welded.
By adopting the technical scheme, when the sound signal is detected to be transmitted from the sound transmitting module to the microphone, if the sound signal is transmitted through the air in the whole course, the transmission time is the first transmission time calculated by the first calculating unit according to the shortest distance; if the propagation medium comprises air and solids, the propagation time will exceed the first propagation time. The time acquisition unit acquires the sending time of the detection sound signal and the receiving time of the microphone receiving the comprehensive sound signal, the second calculating unit calculates the second propagation time in the actual complete propagation process, the third judging unit compares whether the first propagation time and the second propagation time are the same or not, and if so, the comprehensive sound signal received by the microphone is the original detection sound signal; if the signals are different, the integrated sound signal received by the microphone is not the original detection sound signal.
Optionally, the system further comprises a control module, wherein the control module is used for driving the sealing unit to block a pickup hole in the annular bonding pad on the microphone;
the seal module includes:
a sealing unit for being driven by the control module to block the sound pick-up hole;
The light intensity detection unit is positioned in the pickup hole when the sealing unit is blocked in the pickup hole and is used for acquiring the illumination intensity of the sealing unit positioned in the pickup hole;
the sealing detection unit is preset with a light intensity threshold value and is used for comparing the illumination intensity with the light intensity threshold value to detect whether the sealing performance of the sealing unit on the pick-up hole is normal or not;
if the illumination intensity is lower than the light intensity threshold, a first detection result is obtained, wherein the first detection result is that the sealing performance of the sealing unit on the pick-up hole is normal;
if the illumination intensity is not lower than the light intensity threshold, a second detection result is obtained, wherein the second detection result is that the sealing performance of the sealing unit on the pick-up hole is abnormal;
the driving adjustment unit is used for adjusting the driving force of the control module according to the detection result of the sealing detection unit, and the driving force is used for driving the sealing unit to block the pick-up hole;
if the tightness is abnormal, the driving force of the control module to the sealing unit is increased;
and if the tightness is not abnormal, not adjusting the driving force of the control module.
By adopting the technical scheme, the sealing unit is driven by the control module through the driving force and blocks the pickup hole on the microphone, so that the tightness of the sealing unit to the pickup hole is required to be detected at the moment for waterproof detection, and when the sealing unit is sealed in the pickup hole, the pickup hole and the sealing unit form a fully sealed space, so that the illumination intensity in the fully sealed space can be detected through the light intensity detection unit, the illumination intensity is judged through the sealing detection unit, and the situation that a light source enters when the illumination intensity exceeds or is equal to a threshold value is indicated, and the sealing is abnormal; and if the sealing value does not exceed the threshold value, the sealing is normal, and the tightness detection is passed. If the tightness is abnormal, the driving force of the control module is required to be increased by driving the adjusting unit, so that the tightness of the pick-up hole is enhanced by the sealing unit; if the tightness is normal, the driving force does not need to be adjusted, so that the influence of the sealing problem of the sealing unit on the detection result of the waterproof detection is avoided.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the microphone receives sound signals through the sound pickup hole, the sound pickup hole is sealed, then specific detection sound signals are sent around the microphone, if the microphone cannot receive the specific detection sound signals or can only receive the detection sound signals deformed due to different propagation mediums, the fact that the annular bonding pad on the periphery of the sound pickup hole is good in sealing is indicated, the detection sound signals cannot directly reach the sound pickup hole through the annular bonding pad, and therefore the annular bonding pad is good in waterproof performance. The waterproof performance of the microphone can be detected by using the sound through the steps, compared with the detection flow of the airtight detection method, the waterproof performance detection method is convenient and quick, the detection time consumption is less, and the detection efficiency is higher when a plurality of microphone products are detected.
2. The sealing unit is driven by the driving force and blocks the pickup hole on the microphone, the tightness of the sealing unit to the pickup hole is required to be detected at the moment for the rigor of waterproof detection, and if the tightness is abnormal, the driving force to the sealing unit is required to be increased, so that the sealing unit enhances the tightness to the pickup hole; if the tightness is normal, the driving force does not need to be adjusted, so that the influence of the sealing problem of the sealing unit on the detection result of the waterproof detection is avoided.
Drawings
Fig. 1 is a flow chart of a method for testing microphone waterproofing with sound according to one embodiment of the present application.
Fig. 2 is a schematic diagram of a process for determining whether a microphone receives a detected sound signal according to an embodiment of the present application.
Fig. 3 is a second flowchart of determining whether a microphone receives a detected sound signal according to an embodiment of the present application.
Fig. 4 is a schematic flow chart of sealing a pick-up hole by a sealing module according to an embodiment of the present application.
Fig. 5 is a schematic flow chart of detecting tightness of the sealing module to the pick-up hole according to one embodiment of the present application.
Fig. 6 is a system configuration diagram of a waterproof system for a microphone with sound test according to one embodiment of the present application.
Fig. 7 is a system configuration diagram of a decision module according to one embodiment of the present application.
Fig. 8 is a second system configuration diagram of a decision module according to one embodiment of the present application.
FIG. 9 is a system block diagram of a seal module and a control module according to one embodiment of the present application.
Reference numerals illustrate:
1. a sealing module; 2. a sound transmission module; 3. a signal receiving module; 4. a judgment module; 5. a control module; 401. an information acquisition unit; 402. a threshold value generation unit; 403. a signal analysis unit; 404. a first judgment unit; 405. a second judgment unit; 411. a measuring and calculating unit; 412. a first calculation unit; 413. a time acquisition unit; 414. a second calculation unit; 415. a third judgment unit; 11. a sealing unit; 12. a light intensity detection unit; 13. a seal detection unit; 14. the adjustment unit is driven.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-9.
The embodiment of the application discloses a method for testing microphone waterproof by sound.
Referring to fig. 1, a method of testing waterproofing of a microphone with sound includes the steps of:
and 101, sealing a pickup hole in the annular bonding pad on the microphone through a sealing module.
102, sending a detection sound signal to the sound pick-up hole through the sound sending module.
The method comprises the steps of obtaining an initial signal stored locally, and amplifying the initial signal to obtain a specific detection sound signal.
103, after the sound sending module sends the detected sound signal, judging whether the microphone receives the detected sound signal through the pick-up hole, if so, executing step 104; if not, step 105 is performed.
104, judging that the annular bonding pad of the microphone is normally sealed and welded.
And 105, judging that the annular bonding pad of the microphone is abnormal in sealing and welding.
The implementation principle of the embodiment is as follows:
the microphone receives sound signals through the sound pick-up hole, the sound pick-up hole is sealed, then a specific detection sound signal is sent around the microphone, if the microphone still can receive the detection sound signals through the sound pick-up hole at the moment, the annular bonding pad at the periphery of the sound pick-up hole is unsealed, the detection sound signals reach the sound pick-up hole from the unsealed position of the annular bonding pad, and the annular bonding pad is unsealed and is poor in waterproof; if the microphone cannot receive a specific detection sound signal or only receives a detection sound signal deformed by a propagation medium, it means that the annular bonding pad around the sound pick-up hole is sealed well, and the detection sound signal cannot directly reach the sound pick-up hole through the annular bonding pad, so that the annular bonding pad has good waterproof property. The waterproof performance of the microphone can be detected by using the sound through the steps, compared with the detection flow of the airtight detection method, the waterproof performance detection method is convenient and quick, the detection time consumption is less, and the detection efficiency is higher when a plurality of microphone products are detected.
In step 103 of the embodiment shown in fig. 1, the detected sound signal propagates through different media to have different signal attenuation degrees, so that it can be determined whether the sound signal received by the microphone is the detected sound signal according to the basic attribute of the signal. And is specifically described in detail by way of the embodiment shown in fig. 2.
Referring to fig. 2, determining whether a microphone receives a detection sound signal includes the steps of:
the standard frequency and standard amplitude of the detected sound signal are acquired 201 by the sound transmission module.
202, a frequency threshold is generated based on the standard frequency and an amplitude threshold is generated based on the standard amplitude.
The method comprises the steps of calculating an ideal frequency value after attenuation according to a standard frequency and a signal attenuation formula of a detected sound signal in a solid medium, taking the ideal frequency value as a frequency threshold value, calculating an ideal amplitude value after attenuation in the same way, and taking the ideal amplitude value as an amplitude threshold value.
203, acquiring a comprehensive sound signal received by the microphone through the sound pickup hole.
The integrated sound signal may be a detected sound signal, may be a sound signal formed by the detected sound signal propagating through a solid medium, or may be a sound signal formed by other noise.
204, analyzing the integrated sound signal to obtain an integrated frequency and an integrated amplitude of the integrated sound signal.
205, judging whether the integrated frequency is smaller than a frequency threshold, if so, executing step 206; if not, step 207 is performed.
206, judging that the integrated sound signal is not the detection sound signal, and the microphone does not receive the detection sound signal.
207, judging whether the integrated amplitude is smaller than an amplitude threshold, if not, executing step 208; if yes, go to step 209.
208, the integrated sound signal is the detected sound signal, and the microphone receives the detected sound signal.
209, the result of the determination is that the integrated sound signal is not a detection sound signal, and the microphone does not receive the detection sound signal.
The implementation principle of the embodiment is as follows:
if the detected sound signal is directly received by the microphone because the annular bonding pad is not sealed, the signal attenuation generated by the detected sound signal under the air transmission of a short distance is negligible; if the detected sound signal is transmitted to the microphone through solid media such as a sealing unit or an annular bonding pad, the amplitude and the frequency of the detected sound signal are attenuated due to different transmission media, so that the standard frequency and the standard amplitude can be obtained when the detected sound signal is transmitted, a frequency threshold value and an amplitude threshold value are generated based on the standard frequency and the standard amplitude and also an attenuation formula, the integrated frequency and the integrated amplitude of the integrated sound signal received by the microphone are analyzed, the integrated frequency and the frequency threshold value are compared, the integrated amplitude and the amplitude threshold value are compared, and when the two data exceed or are equal to the threshold value, the integrated sound signal received by the microphone can be judged to be the detected sound signal sent by the sound transmission module; when any one data does not exceed the threshold value, the integrated sound signal received by the microphone is judged not to be the original detection sound signal.
In step 103 of the embodiment shown in fig. 1, the propagation speeds of the detected sound signals propagating through different media are different, and since the propagation distances are the same, the propagation speeds are different, so that the propagation times are different, and it can also be determined whether the sound signals received by the microphone are the detected sound signals according to the propagation times. And is specifically described in detail by way of the embodiment shown in fig. 3.
Referring to fig. 3, determining whether the microphone receives the detection sound signal includes the steps of:
301, calculating the shortest distance between the sound sending module and the microphone.
The shortest distance between the sound sending module and the microphone is measured and calculated through the built-in infrared distance measuring device.
302, a first travel time is calculated based on the shortest distance.
The first propagation time is calculated according to the product of the propagation speed of the sound signal in the air and the shortest distance.
The first propagation time is the time required for the sound signal to propagate from the sound sending module to the microphone.
303, acquiring, by the sound transmission module, a transmission time of the detection sound signal.
304, a receiving time for the microphone to receive the integrated sound signal through the sound pick-up hole is obtained.
305, calculating a second propagation time according to the transmission time and the reception time.
306, determining whether the second propagation time is the same as the first propagation time, if so, executing step 307; if not, go to step 308.
307, the result of the determination is that the integrated sound signal is a detection sound signal, and the microphone receives the detection sound signal.
308, the result of the determination is that the integrated sound signal is not a detection sound signal, and the microphone does not receive the detection sound signal.
The implementation principle of the embodiment is as follows:
when the sound signal is detected to be transmitted from the sound transmitting module to the microphone, if the sound signal is transmitted through air in the whole course, the transmission time is a first transmission time calculated according to the shortest distance; if the propagation medium comprises air and solids, the propagation time will exceed the first propagation time. Therefore, according to the sending time of the detection sound signal by the sound sending module and the receiving time of the integrated sound signal received by the microphone, the second propagation time in the actual complete propagation process can be calculated, whether the first propagation time and the second propagation time are the same or not is compared, if so, the integrated sound signal received by the microphone is the original detection sound signal; if the signals are different, the integrated sound signal received by the microphone is not the original detection sound signal.
In step 101 of the embodiment shown in fig. 1, it is necessary to detect the tightness in the process of sealing the sound pick-up hole by the sealing module, and to adjust the driving force in the sealing process according to the detection result. And is specifically described in detail by way of the embodiment shown in fig. 4.
Referring to fig. 4, sealing the sound pickup hole by the sealing module includes the steps of:
401, the control seal module blocks a pickup hole in the annular pad on the microphone.
402, detecting the tightness of the sealing module to the pick-up hole, and obtaining a detection result.
403, judging whether the tightness is abnormal according to the detection result, if so, executing step 404; if not, go to step 405.
404, increasing the driving force to the seal module.
Wherein, the driving force is used for driving the sealing unit to block up the pickup hole.
405, the driving force is not adjusted.
The implementation principle of the embodiment is as follows:
the sealing module is driven by the driving force and blocks the pickup hole on the microphone, the tightness of the sealing unit to the pickup hole is required to be detected at the moment for the rigor of waterproof detection, and if the tightness is abnormal, the driving force to the sealing module is required to be increased, so that the sealing module enhances the tightness to the pickup hole; if the tightness is normal, the driving force does not need to be adjusted, so that the influence of the sealing problem of the sealing module on the detection result of the waterproof detection is avoided.
In step 402 of the embodiment shown in fig. 4, when the control module blocks the sound pick-up hole, the sound pick-up hole and the control module form a sealed space, and if the sealed space is well sealed, no light source will appear in the sealed space, so that it can be determined whether the sealed space is abnormal or not by detecting the illumination intensity of the sealed space. The embodiment shown in fig. 5 is specifically described in detail.
Referring to fig. 5, detecting tightness of the sealing module to the sound pickup hole includes the steps of:
501, obtain the illumination intensity that sealing module is located the pickup hole.
Wherein, the part that sealing module is located the pickup hole is equipped with light source generating device, and light source generating device generates the light source to the direction in pickup hole to also can detect under the environment that illumination condition is poor, acquire the illumination intensity that sealing module is located the pickup hole through illumination sensor.
502, judging whether the illumination intensity is lower than a preset light intensity threshold, if yes, executing step 503; if not, then step 504 is performed.
503, obtaining a first detection result.
The first detection result is that the sealing module is normal to the tightness of the pick-up hole.
504, obtaining a second detection result.
The second detection result is that the sealing performance of the sealing module to the pick-up hole is abnormal.
The implementation principle of the embodiment is as follows:
when the sealing module is sealed in the sound pick-up hole, the sound pick-up hole and the sealing module form a fully sealed space, so that the illumination intensity in the fully sealed space can be detected, the illumination intensity is judged by combining with a preset light intensity threshold value, and when the illumination intensity exceeds or is equal to the threshold value, the light source enters, and the sealing is abnormal; and if the sealing value does not exceed the threshold value, the sealing is normal, and the tightness detection is passed.
The embodiment of the application also discloses a system for testing the microphone waterproof by sound.
Referring to fig. 6, the system includes a sealing module 1, a sound transmitting module 2, a signal receiving module 3, and a determining module 4, a sound pick-up hole is sealed by the sealing module 1, and a specific detection sound signal is transmitted around a microphone by the sound transmitting module 2, wherein the sound transmitting module 2 includes a storage unit, a signal amplifying unit, and a sound generating unit, and the sound generating unit may be a horn or a speaker. The storage unit stores initial signals, when the sound sending module 2 is required to send out detection sound signals, the signal amplifying unit obtains the initial signals in the storage unit, amplifies the initial signals to obtain specific detection sound signals, and finally sends out the detection sound signals through the sound generating unit.
If the microphone still can receive the detection sound signal through the pickup hole and the signal receiving module 3 at this time, the annular bonding pad at the periphery of the pickup hole is unsealed, the detection sound signal reaches the pickup hole from the unsealed position of the annular bonding pad and is received by the signal receiving module 3, and the annular bonding pad is unsealed and is poor in waterproof; if the signal receiving module 3 cannot receive a specific detection sound signal or only receives a detection sound signal deformed by a propagation medium, it indicates that the annular pad around the sound pick-up hole is sealed well, and the detection sound signal cannot directly reach the sound pick-up hole through the annular pad, so that the annular pad has good waterproof property. The waterproof performance of the microphone can be detected by using the sound through the steps, compared with the detection flow of the airtight detection method, the waterproof performance detection method is convenient and quick, the detection time consumption is less, and the detection efficiency is higher when a plurality of microphone products are detected.
Referring to fig. 7, the determination module 4 includes an information acquisition unit 401, a threshold generation unit 402, a signal analysis unit 403, a first determination unit 404, and a second determination unit 405. The information obtaining unit 401 obtains the standard frequency and standard amplitude when the detected sound signal is sent, the threshold generating unit 402 generates a frequency threshold and an amplitude threshold based on the standard frequency and standard amplitude and also an attenuation formula, the signal analyzing unit 403 analyzes the integrated frequency and the integrated amplitude of the integrated sound signal received by the microphone, the first judging unit 404 compares the integrated frequency with the frequency threshold, the second judging unit 405 compares the integrated amplitude with the amplitude threshold, and when the two data exceed or equal to the threshold, the integrated sound signal received by the microphone can be judged to be the detected sound signal sent by the sound sending module 2; when any one data does not exceed the threshold value, the integrated sound signal received by the microphone is judged not to be the original detection sound signal.
In another embodiment, the determination module 4 may also make the determination based on the propagation time of the detected sound signal. The embodiment shown in fig. 8 is specifically described in detail.
Referring to fig. 8, the determination module 4 includes a measurement unit 411, a first calculation unit 412, a time acquisition unit 413, a second calculation unit 414, and a third determination unit 415. The measuring unit 411 may be an infrared distance measuring device, and the shortest distance between the sound sending module 2 and the microphone may be measured by the measuring unit 411, and when the sound signal propagates from the sound sending module 2 to the microphone, if the sound signal propagates through the air in the whole course, the propagation time is a first propagation time calculated by the first calculating unit 412 according to the shortest distance, where the first propagation time is a product of a speed of the sound signal propagating in the air and the shortest distance.
If the propagation medium comprises air and solids, the propagation time will exceed the first propagation time. Thus, the time acquisition unit 413 acquires the transmission time of the detection sound signal by the sound transmission module 2 and the reception time of the integrated sound signal received by the microphone, and calculates the second propagation time in the actual complete propagation process by the second calculation unit 414, the second propagation time being the absolute value of the difference between the transmission time and the reception time. The third judging unit 415 compares whether the first propagation time and the second propagation time are the same, and if so, it indicates that the integrated sound signal received by the microphone is the original detected sound signal; if the signals are different, the integrated sound signal received by the microphone is not the original detection sound signal.
Referring to fig. 9, the sealing module 1 includes a sealing unit 11, a light intensity detecting unit 12, a sealing detecting unit 13, and a driving adjustment unit 14. The sealing unit 11 can be a silica gel column, the light intensity detection unit 12 is an illumination sensor, the light intensity detection unit 12 is installed at one end of the sealing unit 11, and when the sealing unit 11 blocks the pickup hole, the light intensity detection unit 12 is located in the pickup hole. The system for testing the waterproofing of the microphone with sound further comprises a control module 5, the control module 5 may be a mechanical arm, and when the microphone is placed at a fixed position, the control module 5 blocks the pick-up hole on the microphone by a preset operation program and by driving the sealing unit 11 by a driving force.
In order to detect the tightness of the waterproof detection, the tightness of the sealing unit 11 to the sound pick-up hole needs to be detected at this time, when the sealing unit 11 is sealed in the sound pick-up hole, the sound pick-up hole and the sealing unit 11 form a fully sealed space, so that the illumination intensity in the fully sealed space can be detected through the light intensity detection unit 12, then the illumination intensity is judged through the sealing detection unit 13, and if the illumination intensity exceeds or is equal to a threshold value, the light source enters, and the sealing is abnormal; and if the sealing value does not exceed the threshold value, the sealing is normal, and the tightness detection is passed. If the tightness is abnormal, the driving force of the control module 5 needs to be increased by driving the adjusting unit 14, so that the sealing unit 11 enhances the tightness of the pick-up hole; if the tightness is normal, the driving force does not need to be adjusted, so that the influence of the sealing problem of the sealing unit 11 on the detection result of the waterproof detection is avoided.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (6)
1. A method for testing the waterproofing of a microphone with sound, comprising the steps of:
sealing a pickup hole in the annular bonding pad on the microphone through a sealing module;
transmitting a detection sound signal to the sound pick-up hole through a sound transmitting module;
after the sound sending module sends the detection sound signal, judging whether the microphone receives the detection sound signal through the pickup hole;
if the microphone receives the detection sound signal through the pickup hole, judging that the sealing and welding of the annular bonding pad of the microphone are abnormal;
if the microphone does not receive the detection sound signal through the pickup hole, judging that the sealing and welding of the annular bonding pad of the microphone are normal;
the sound pick-up hole in the annular bonding pad on the microphone is sealed through the sealing module, and the sound pick-up hole comprises the following steps:
the control sealing module blocks a pickup hole in the annular bonding pad on the microphone;
Detecting the tightness of the sealing module to the pick-up hole to obtain a detection result;
judging whether the tightness is abnormal according to the detection result;
if the tightness is abnormal, driving force to the sealing module is increased, wherein the driving force is used for driving the sealing module to block the pick-up hole;
if the tightness is not abnormal, not adjusting the driving force;
the method for detecting the tightness of the sealing module to the pick-up hole comprises the following steps of:
acquiring illumination intensity of the sealing module in the pick-up hole;
judging whether the illumination intensity is lower than a preset light intensity threshold value or not;
if the illumination intensity is lower than the light intensity threshold, a first detection result is obtained, wherein the first detection result is that the sealing performance of the sealing module on the pick-up hole is normal;
and if the illumination intensity is not lower than the light intensity threshold, obtaining a second detection result, wherein the second detection result is that the sealing performance of the sealing module on the pick-up hole is abnormal.
2. The method of testing microphone waterproofing with sound according to claim 1, wherein the judging whether the microphone receives the detected sound signal through the sound pickup hole comprises the steps of:
Acquiring standard frequency and standard amplitude of the detected sound signal through the sound transmission module;
generating a frequency threshold based on the standard frequency and an amplitude threshold based on the standard amplitude;
acquiring a comprehensive sound signal received by the microphone through the pickup hole;
analyzing the integrated sound signal to obtain integrated frequency and integrated amplitude of the integrated sound signal;
judging whether the comprehensive frequency is smaller than the frequency threshold value;
if the integrated frequency is smaller than the frequency threshold, judging that the integrated sound signal is not the detection sound signal, wherein the microphone does not receive the detection sound signal;
if the integrated frequency is not less than the frequency threshold, judging whether the integrated amplitude is less than the amplitude threshold;
if the integrated amplitude is not smaller than the amplitude threshold, judging that the integrated sound signal is the detection sound signal, and receiving the detection sound signal by the microphone;
and if the integrated amplitude is smaller than the amplitude threshold, judging that the integrated sound signal is not the detection sound signal, wherein the microphone does not receive the detection sound signal.
3. The method of waterproofing a sound test microphone according to claim 1, wherein said determining whether said microphone receives said detected sound signal through said sound pick-up hole comprises the steps of:
calculating the shortest distance from the sound sending module to the microphone;
calculating a first propagation time based on the shortest distance, the first propagation time being a time required for a sound signal to propagate from the sound transmission module to the microphone;
acquiring the transmission time of the detection sound signal through the sound transmission module;
acquiring the receiving time of the microphone for receiving the comprehensive sound signal through the pick-up hole;
calculating a second propagation time from the transmission time and the reception time;
judging whether the second propagation time is identical to the first propagation time;
if the second propagation time is the same as the first propagation time, determining that the integrated sound signal is the detection sound signal, and the microphone receives the detection sound signal;
and if the second propagation time is different from the first propagation time, judging that the comprehensive sound signal is not the detection sound signal, wherein the microphone does not receive the detection sound signal.
4. A system for testing microphone waterproofing with sound, comprising:
the sealing module (1) is used for sealing a pickup hole in the annular bonding pad on the microphone;
a sound transmission module (2) for transmitting a detection sound signal to the sound pickup hole;
the signal receiving module (3) is arranged on the microphone and connected with the pickup hole, and is used for receiving the detection sound signal through the pickup hole after the sound sending module (2) sends the detection sound signal;
a judging module (4) for judging whether the annular bonding pad of the microphone is normally sealed and welded according to the receiving condition of the detection sound signal by the signal receiving module (3);
when the signal receiving module (3) receives the detection sound signal, judging that the sealing and welding of the annular bonding pad of the microphone are abnormal;
when the signal receiving module (3) does not receive the detection sound signal, judging that the sealing and welding of the annular bonding pad of the microphone are normal;
the system further comprises a control module (5), wherein the control module (5) is used for driving the sealing module (1) to block a pickup hole in the annular bonding pad on the microphone;
the sealing module (1) comprises:
A sealing unit (11) for being driven by the control module (5) to block the sound pick-up hole;
the light intensity detection unit (12) is positioned in the pickup hole when the sealing unit (11) is blocked in the pickup hole and is used for acquiring the illumination intensity of the sealing unit (11) positioned in the pickup hole;
a sealing detection unit (13) is preset with a light intensity threshold value and is used for comparing the illumination intensity with the light intensity threshold value to detect whether the sealing performance of the sealing unit (11) on the pick-up hole is normal or not;
if the illumination intensity is lower than the light intensity threshold, a first detection result is obtained, wherein the first detection result is that the sealing performance of the sealing unit (11) on the pick-up hole is normal;
if the illumination intensity is not lower than the light intensity threshold, a second detection result is obtained, wherein the second detection result is that the sealing performance of the sealing unit (11) on the pick-up hole is abnormal;
a driving adjustment unit (14) for adjusting the driving force of the control module (5) according to the detection result of the seal detection unit (13), wherein the driving force is used for driving the seal unit (11) to block the pick-up hole;
if the tightness is abnormal, the driving force of the control module (5) to the sealing unit (11) is increased;
If the tightness is not abnormal, the driving force of the control module (5) is not adjusted.
5. A system for waterproofing a microphone with sound according to claim 4 wherein said decision module (4) comprises:
an information acquisition unit (401) connected to the sound transmission module (2) and used for acquiring the standard frequency and standard amplitude of the detection sound signal sent by the sound transmission module (2);
a threshold generation unit (402) for generating a frequency threshold from the standard frequency and an amplitude threshold from the standard amplitude;
a signal analysis unit (403) for acquiring the integrated sound signal received by the signal receiving module (3) and analyzing the integrated sound signal to obtain an integrated frequency and an integrated amplitude of the integrated sound signal;
a first judging unit (404) configured to judge whether the integrated frequency is smaller than the frequency threshold, and if the integrated frequency is smaller than the frequency threshold, the result of the judgment is that the integrated sound signal is not the detected sound signal, the signal receiving module (3) does not receive the detected sound signal, and the annular bonding pad of the microphone is sealed and welded abnormally;
A second judgment unit (405) for judging whether the integrated amplitude is smaller than the amplitude threshold value when the first judgment unit (404) judges that the integrated frequency is not smaller than the frequency threshold value;
if the comprehensive amplitude is not smaller than the amplitude threshold, judging that the comprehensive sound signal is the detection sound signal, wherein the signal receiving module (3) receives the detection sound signal, and the annular bonding pad of the microphone is normally sealed and welded;
if the integrated amplitude is smaller than the amplitude threshold, the integrated sound signal is not the detection sound signal, the signal receiving module (3) does not receive the detection sound signal, and the annular bonding pad of the microphone is abnormal in sealing and welding.
6. A system for waterproofing a microphone with sound according to claim 4 wherein said decision module (4) comprises:
a measuring unit (411) for measuring the shortest distance from the sound transmission module (2) to the microphone;
a first calculation unit (412) for calculating a first propagation time, which is a time required for a sound signal to propagate from the sound transmission module (2) to the microphone, from the shortest distance;
A time acquisition unit (413) connected to the sound transmission module (2) and the signal receiving module (3) respectively, for acquiring a transmission time of the sound transmission module (2) for transmitting the detection sound signal and a reception time of the signal receiving module (3) for receiving the integrated sound signal;
a second calculation unit (414) for calculating a second propagation time from the transmission time and the reception time;
a third judging unit (415) for judging whether the second propagation time is the same as the first propagation time;
if the second propagation time is the same as the first propagation time, judging that the comprehensive sound signal is the detection sound signal, wherein the microphone receives the detection sound signal, and the annular bonding pad of the microphone is abnormal in sealing and welding;
if the second propagation time is different from the first propagation time, the judgment result is that the comprehensive sound signal is not the detection sound signal, the microphone does not receive the detection sound signal, and the annular bonding pad of the microphone is normally sealed and welded.
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