CN108834011B - Method and device for performing electrostatic protection on microphone - Google Patents
Method and device for performing electrostatic protection on microphone Download PDFInfo
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- CN108834011B CN108834011B CN201810542033.7A CN201810542033A CN108834011B CN 108834011 B CN108834011 B CN 108834011B CN 201810542033 A CN201810542033 A CN 201810542033A CN 108834011 B CN108834011 B CN 108834011B
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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
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/08—Mouthpieces; Microphones; Attachments therefor
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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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
Abstract
The embodiment of the invention discloses a method and a device for carrying out electrostatic protection on a microphone, relating to the technical field of electrostatic protection, and aiming at timely and efficiently completing electrostatic discharge on the microphone on the premise of not increasing additional cost so as to achieve the electrostatic protection on the microphone, simultaneously not influencing the reception sensitivity of the microphone and greatly improving the cost performance of the microphone. The embodiment of the invention adopts the main technical scheme that: monitoring an electrostatic voltage present on an outer surface of a microphone, the electrostatic voltage being generated from an electrostatic charge accumulated on the outer surface of the microphone; judging whether the value of the static voltage is larger than a first preset threshold value or not; if so, transferring the accumulated electrostatic charge to a reference ground of the printed circuit board. The embodiment of the invention is mainly used for carrying out electrostatic protection on the microphone on the printed circuit board.
Description
Technical Field
The embodiment of the invention relates to the technical field of electrostatic protection, in particular to a method and a device for performing electrostatic protection on a microphone.
Background
The generation of static electricity is inevitable in industrial production, for example, contacting, rubbing, or inductive charging, etc. objects with different static electric potentials are close to each other or directly contact with each other, which will cause charge transfer to generate static electricity discharge, and the static electricity discharge will also cause harm to industrial production, such as causing malfunction of electronic equipment, causing electromagnetic interference, etc. Therefore, it is usually necessary to perform an electrostatic discharge (ESD) test on the electronic device when the electronic device is shipped from a factory to complete the forced certification that the product quality reaches the standard, so as to ensure that the damage to the electronic device caused by the ESD is eliminated as much as possible when the user normally uses the electronic device.
At present, in the process of performing the forced certification of the ESD test on the audio device, a metal shield is usually added on the outer surface of the built-in microphone, and the metal shield is grounded, so as to provide an electrostatic discharge path by using the metal shield, and prevent the microphone from being unstable and even damaged due to the influence of electrostatic discharge in the ESD test. However, the addition of the metal shield greatly affects the sound receiving sensitivity of the microphone, reduces the use value of the microphone, increases the structural design cost, and finally greatly reduces the cost performance of the microphone.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a method and an apparatus for performing electrostatic protection on a microphone, and mainly aim to achieve electrostatic protection on the microphone by transferring a large amount of electrostatic charges accumulated on an outer surface of the microphone to a reference ground of a printed circuit board and then timely and efficiently completing electrostatic discharge on the microphone without increasing additional cost, and at the same time, without affecting a sound receiving sensitivity of the microphone, thereby greatly improving a performance-to-price ratio of the microphone.
In order to achieve the above purpose, the embodiments of the present invention mainly provide the following technical solutions:
in one aspect, an embodiment of the present invention provides a method for performing electrostatic protection on a microphone, where the method includes:
monitoring an electrostatic voltage present on an outer surface of a microphone, the electrostatic voltage being generated from an electrostatic charge accumulated on the outer surface of the microphone;
judging whether the value of the static voltage is larger than a first preset threshold value or not;
if so, transferring the accumulated electrostatic charge to a reference ground of the printed circuit board.
Optionally, the transferring the accumulated electrostatic charges to a reference ground of the printed circuit board includes:
determining a grounding end of an analog signal corresponding to the microphone on the printed circuit board;
connecting the grounding end of the analog signal directly with the reference ground of the printed circuit board so as to transfer the accumulated static charges to the reference ground of the printed circuit board; or
And connecting the grounding end of the analog signal with the reference ground of the printed circuit board through a zero ohm resistor so as to transfer the accumulated static charges to the reference ground of the printed circuit board.
Optionally, the method further includes:
increasing the electrostatic voltage existing on the outer surface of the microphone according to a preset increment value to obtain a plurality of electrostatic voltage values;
when the static charges accumulated on the outer surface of the microphone are released to generate static discharge, monitoring current values corresponding to the plurality of static voltage values;
judging whether the current value is not greater than a second preset threshold value or not;
if so, determining that the normal operation of the microphone is not influenced by the electrostatic discharge, and marking the electrostatic voltage value corresponding to the current value as safe;
extracting a maximum value from the plurality of electrostatic voltage values marked as safe;
and determining the maximum value as a limit electrostatic voltage value corresponding to the microphone on the printed circuit board.
Optionally, the electrostatic charge accumulated on the outer surface of the microphone at least includes an electrostatic charge generated by direct contact with the microphone and/or an electrostatic charge generated by inductive electricity within a third preset threshold distance from the microphone.
On the other hand, an embodiment of the present invention further provides a device for performing electrostatic protection on a microphone, where the device includes:
a monitoring unit for monitoring an electrostatic voltage present on an outer surface of a microphone, the electrostatic voltage being generated from electrostatic charges accumulated on the outer surface of the microphone;
the judging unit is used for judging whether the value of the static voltage is larger than a first preset threshold value or not;
and the transfer unit is used for transferring the accumulated electrostatic charges to a reference ground of the printed circuit board when the value of the electrostatic voltage is judged to be larger than a first preset threshold value.
Optionally, the transfer unit includes:
the determining module is used for determining the grounding end of the analog signal corresponding to the microphone on the printed circuit board;
the first connecting module is used for directly connecting the grounding end of the analog signal with the reference ground of the printed circuit board so as to transfer the accumulated static charges to the reference ground of the printed circuit board;
and the second connecting module is used for connecting the grounding end of the analog signal with the reference ground of the printed circuit board through a zero-ohm resistor so as to transfer the gathered static charges to the reference ground of the printed circuit board.
Optionally, the apparatus further comprises:
an increasing unit configured to increase an electrostatic voltage present on an outer surface of the microphone according to a preset increment value to obtain a plurality of electrostatic voltage values;
the monitoring unit is further used for monitoring current values corresponding to the plurality of electrostatic voltage values when electrostatic charges accumulated on the outer surface of the microphone are released to generate electrostatic discharge;
the judging unit is also used for judging whether the current value is not greater than a second preset threshold value;
the determining unit is used for determining that the normal operation of the microphone is not influenced by the electrostatic discharge when the judging unit judges that the current value is not larger than a second preset threshold value;
the marking unit is used for marking the electrostatic voltage value corresponding to the current value as safe;
an extracting unit for extracting a maximum value among the plurality of electrostatic voltage values marked as safe;
the determining unit is further used for determining the maximum number value extracted by the extracting unit as a limit electrostatic voltage value corresponding to the microphone on the printed circuit board.
Optionally, the electrostatic charge accumulated on the outer surface of the microphone at least includes an electrostatic charge generated by direct contact with the microphone and/or an electrostatic charge generated by inductive electricity within a third preset threshold distance from the microphone.
By the technical scheme, the technical scheme provided by the embodiment of the invention at least has the following advantages:
the embodiment of the invention provides a method and a device for carrying out electrostatic protection on a microphone. The embodiment of the invention monitors whether the static electricity discharge is generated on the microphone in real time and further judges the degree of the generated static electricity discharge by monitoring the static electricity voltage on the outer surface of the microphone in real time, and when the static electricity voltage on the outer surface of the microphone reaches a specified threshold value, the static electricity charge accumulated on the outer surface of the microphone is transferred to the reference ground of a printed circuit board in order to avoid the interference or damage of the static electricity discharge to the microphone, so that the accumulated static electricity charge can be discharged efficiently in real time. Compared with the prior art, the problem that the addition of an additional appearance structure design greatly influences the sound receiving sensitivity of the microphone, reduces the use value of the microphone and increases the structure design cost is solved. The embodiment of the invention can complete the electrostatic discharge on the microphone in time and efficiently without adding extra appearance structure design on the premise of not increasing extra additional cost so as to achieve the electrostatic protection on the microphone, simultaneously does not influence the sound receiving sensitivity of the microphone, and greatly improves the cost performance of the microphone.
The foregoing description is only an overview of the technical solutions of the embodiments of the present invention, and the embodiments of the present invention can be implemented according to the content of the description in order to make the technical means of the embodiments of the present invention more clearly understood, and the detailed description of the embodiments of the present invention is provided below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the embodiments of the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a flowchart of a method for performing electrostatic protection on a microphone according to an embodiment of the present invention;
fig. 2 is a flowchart of another method for performing electrostatic protection on a microphone according to an embodiment of the present invention;
fig. 3 is a block diagram illustrating an apparatus for performing electrostatic protection on a microphone according to an embodiment of the present invention;
fig. 4 is a block diagram of another apparatus for performing electrostatic protection on a microphone according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device for performing electrostatic protection on a microphone according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the embodiments to those skilled in the art.
The embodiment of the present invention provides a method for performing electrostatic protection on a microphone, as shown in fig. 1, the method is a method for transferring electrostatic charges accumulated on an outer surface of the microphone to a reference ground of a printed circuit board, and timely and efficiently completing the release of a large amount of accumulated electrostatic charges, and the following specific steps are provided for the embodiment of the present invention:
101. the presence of an electrostatic voltage on the outer surface of the microphone is monitored.
Wherein the electrostatic voltage is generated according to the electrostatic charges accumulated on the outer surface of the microphone. Static electricity is a natural physical phenomenon, which corresponds to a static or non-flowing charge. Static electricity is formed when charges are accumulated on an object or a surface, and the charges are classified into two kinds of positive charges and negative charges, that is, the static electricity phenomenon is also classified into two kinds, i.e., positive static electricity and negative static electricity. When positive charges are accumulated on an object, positive static electricity is formed, and when negative charges are accumulated on an object, negative static electricity is formed, but whether positive static electricity or negative static electricity, charge transfer occurs when an electrostatically charged object contacts a zero potential object (grounded object) or an object having a potential difference with the object, that is, when charge transfer occurs, static electricity discharge occurs.
In the embodiment of the invention, whether the static electricity discharge is generated on the microphone is monitored in real time by monitoring the static electricity voltage on the outer surface of the microphone in real time, and the degree of the generated static electricity discharge is judged by monitoring the value of the static electricity voltage in real time.
102. And judging whether the value of the electrostatic voltage is larger than a first preset threshold value or not.
Wherein the first preset threshold is a value of voltage as a numerical measure for monitoring whether a value of an electrostatic voltage present on an outer surface of the microphone reaches a specified value.
In the embodiment of the invention, the degree of electrostatic discharge is judged according to the value of the electrostatic voltage monitored in real time, so that whether the degree of electrostatic discharge on the microphone reaches the specified degree is further judged by comparing the value of the electrostatic voltage monitored on the outer surface of the microphone in real time with the specified value, wherein the specified degree refers to the upper limit degree corresponding to the condition that the normal operation of the microphone is influenced or the microphone is damaged when the electrostatic discharge occurs at a high probability.
103. And if the value of the electrostatic voltage is judged to be larger than the first preset threshold value, transferring the accumulated electrostatic charges to a reference ground of the printed circuit board.
Among them, a Printed Circuit Board (PCB) is manufactured by electronic printing and used as a support or carrier for electrical connection of electronic components. The reference ground of the PCB is a common terminal which forms a circuit signal loop on the PCB, and is a reference terminal of the potential of other points, which is equivalent to the zero potential on the PCB.
In the embodiment of the present invention, when it is determined that the value of the electrostatic voltage on the outer surface of the microphone is greater than the specified value, it is determined whether the degree of electrostatic discharge on the microphone has reached the specified degree, and herein, by using the method of transferring a large amount of electrostatic charges accumulated on the outer surface of the microphone to the zero potential on the PCB, the accumulated large amount of electrostatic charges are timely discharged according to the circuit path of the zero potential transferred to the PCB, so as to timely complete electrostatic protection on the microphone, and finally achieve the purpose of passing an electrostatic discharge test (ESD) during the production of the device.
In the embodiment of the invention, the method for timely and efficiently completing the electrostatic discharge by transferring the electrostatic charges accumulated on the outer surface of the microphone to the electrostatic discharge circuit path corresponding to the reference ground of the PCB can generally bear the electrostatic voltage of 10kv to 25kv during the ESD test so as to achieve the electrostatic protection of the microphone.
The embodiment of the invention provides a method for carrying out electrostatic protection on a microphone. The embodiment of the invention monitors whether the static electricity discharge is generated on the microphone in real time and further judges the degree of the generated static electricity discharge by monitoring the static electricity voltage on the outer surface of the microphone in real time, and when the static electricity voltage on the outer surface of the microphone reaches a specified threshold value, the static electricity charge accumulated on the outer surface of the microphone is transferred to the reference ground of a printed circuit board in order to avoid the interference or damage of the static electricity discharge to the microphone, so that the accumulated static electricity charge can be discharged efficiently in real time. The embodiment of the invention can complete the electrostatic discharge on the microphone in time and efficiently without adding extra appearance structure design on the premise of not increasing extra additional cost so as to achieve the electrostatic protection on the microphone, simultaneously does not influence the sound receiving sensitivity of the microphone, and greatly improves the cost performance of the microphone.
In order to explain the above embodiments in more detail, another method for performing electrostatic protection on a microphone according to an embodiment of the present invention is provided, as shown in fig. 2, in which a ground terminal of an analog signal is directly connected to a reference ground of a PCB, or the ground terminal of the analog signal is connected to the reference ground of the PCB through a zero-ohm resistor, and accumulated electrostatic charges are timely and efficiently transferred to the reference ground of the PCB, and the following specific steps are provided for the embodiment of the present invention:
201. the presence of an electrostatic voltage on the outer surface of the microphone is monitored.
Wherein the electrostatic voltage is generated according to the electrostatic charges accumulated on the outer surface of the microphone. In the embodiment of the present invention, the electrostatic charges accumulated on the outer surface of the microphone at least include electrostatic charges generated by direct contact with the microphone, or electrostatic charges generated by induction electricity within a preset threshold distance from the microphone, or both. The electrostatic charge generated by direct contact with the microphone refers to static electricity generated by direct contact and friction with the microphone. Here, the preset threshold range refers to a range as close to the microphone as possible, within which electrostatic induction is generated due to environmental changes.
In the embodiment of the invention, whether the static electricity discharge is generated on the microphone is monitored in real time by monitoring the static electricity voltage on the outer surface of the microphone in real time, and the degree of the generated static electricity discharge is judged by monitoring the value of the static electricity voltage in real time. Specifically, please refer to the statement in step 101, which is not described herein again.
202. And judging whether the value of the electrostatic voltage is larger than a first preset threshold value or not.
In the embodiment of the invention, the degree of electrostatic discharge is judged according to the value of the electrostatic voltage monitored in real time, so that whether the degree of electrostatic discharge on the microphone reaches the specified degree is further judged by comparing the value of the electrostatic voltage monitored on the outer surface of the microphone in real time with the specified value, wherein the specified degree refers to the upper limit degree corresponding to the condition that the normal operation of the microphone is influenced or the microphone is damaged when the electrostatic discharge occurs at a high probability.
203. And if the value of the electrostatic voltage is judged to be larger than the first preset threshold value, transferring the accumulated electrostatic charges to a reference ground of the printed circuit board.
In the embodiment of the present invention, for this step, first, the grounding terminal of the analog signal corresponding to the microphone is determined on the PCB.
Here, when recording audio data with a microphone, an audio signal corresponding to the audio data is extracted, where the audio signal refers to an information carrier indicating a change in frequency and amplitude of a sound wave, where the sound wave refers to propagation of vibration generated by a sounding body in air or other substances, and may be characterized as a continuously changing analog signal, where three important parameters of the sound wave are frequency, amplitude, and phase. In this case, the audio signal corresponding to the audio data, i.e. the corresponding analog signal, is extracted. Further, after the audio signal corresponding to the audio data is extracted, the voice module built in the microphone receives the audio signal (i.e., analog signal), and inputs the analog signal to the analog circuit, which is used for performing transmission, conversion, processing, amplification, measurement, display, and the like on the analog signal, where the analog circuit can be detected and a ground terminal of the analog signal can be determined.
Secondly, the grounding end of the analog signal is directly connected with the reference ground of the PCB, or the grounding end of the analog signal is connected with the reference ground of the PCB through a zero-ohm resistor, so that a circuit path of electrostatic discharge can be determined, when electrostatic discharge occurs on the microphone, a large amount of accumulated electrostatic charges are timely discharged, and the purpose of timely completing electrostatic protection on the microphone is achieved.
Furthermore, the grounding end of the analog signal is directly connected with the reference ground of the PCB, so that the shortest circuit path of electrostatic discharge can be determined as much as possible, and the electrostatic charge can be prevented from flowing through other electrical components on the PCB to cause damage to the other electrical components, such as influence on normal operation or damage, during electrostatic discharge.
Furthermore, the grounding end of the analog signal is connected with the reference ground of the PCB through a zero-ohm resistor, wherein the zero-ohm resistor is equivalent to a cross-over resistor, the non-real resistance value of the zero-ohm resistor is zero, the ohmic resistor is actually a resistor with a very small resistance value, and the zero-ohm resistor can be used for replacing a jumper wire on the PCB so as to adapt to debugging or be convenient for compatible design, and electric elements on the PCB are connected. For example, because the circuit layout and the space on the PCB are limited, when the grounding end of the analog signal cannot be connected with the reference ground of the PCB nearby, the grounding end of the analog signal can be connected with the reference ground of the PCB through the zero-ohm resistor, and for example, because the grounding end of the analog signal is connected with the reference ground of the PCB through the zero-ohm resistor, a transmitting line can be connected through the zero-ohm resistor, so as to enhance the audio signal received by the microphone and increase the sensitivity of the microphone for receiving sound.
204. And increasing the electrostatic voltage existing on the outer surface of the microphone according to the preset increment value to obtain a plurality of electrostatic voltage values.
In the embodiment of the invention, after the circuit path of the static electricity discharge is determined, the static electricity voltage on the outer surface of the microphone is increased in a stepwise manner according to the preset increment value, so that the degree of simulating the static electricity discharge when the static electricity discharge is generated on the microphone, namely the static electricity voltage which is possibly generated on the outer surface of the microphone due to the generation of the static electricity is realized.
For the embodiments of the present invention, the purpose of stepwise increasing the electrostatic voltage to simulate different situations where there is an electrostatic voltage on the outer surface of the microphone is to test how much electrostatic hazard pressure the microphone can withstand.
205. When the static charges accumulated on the outer surface of the microphone are released to generate static discharge, current values corresponding to a plurality of static voltage values are monitored.
In the embodiment of the invention, according to the method for increasing the electrostatic voltage on the outer surface of the microphone in a stepwise manner, a plurality of values of the electrostatic voltage can be monitored when the electrostatic discharge occurs on the outer surface of the microphone. Furthermore, the current value generated on the static electricity discharge circuit path during the static electricity discharge can be monitored, and accordingly, the current values corresponding to a plurality of static electricity voltage values can be obtained, wherein the static electricity discharge circuit path refers to a circuit path corresponding to the grounding end of an analog signal on the PCB which is directly connected with the reference ground of the PCB, or a circuit path corresponding to the grounding end of the analog signal which is connected with the reference ground of the PCB through a zero-ohm resistor.
206. And judging whether the current value is not greater than a second preset threshold value.
The second preset threshold is a current value, which is a pre-specified current value, and may be an electrical industry safety current standard value, and the pre-specified current value is used for measuring whether damage to the microphone due to an excessive current value on the microphone exists.
207. And if the current value is not larger than the second preset threshold value, determining that the normal operation of the microphone is not influenced by electrostatic discharge, and marking the electrostatic voltage value corresponding to the current value as safe.
In the embodiment of the invention, when the current value on the circuit path of the electrostatic discharge is judged to be not more than the pre-specified current value, the reference ground method for transferring the accumulated electrostatic charges to the printed circuit board during the electrostatic discharge is determined, so that a large amount of electrostatic charges accumulated on the outer surface of the microphone can be timely discharged, and the microphone can be timely protected from static electricity.
Further, the static voltage value corresponding to the current value may be marked as safe, that is, when the value of the increased static voltage reaches the marked safe static voltage value, it indicates that the static discharge process may timely perform a static protection function on the microphone, that is, timely discharge a large amount of static charges accumulated on the outer surface of the microphone.
208. The maximum value is extracted among a plurality of electrostatic voltage values marked as safe.
In the embodiment of the invention, through the judging process, a plurality of electrostatic voltage values marked as safe can be obtained, and the maximum value of the electrostatic voltage values is extracted.
209. And determining the maximum value as the limit electrostatic voltage value corresponding to the microphone on the printed circuit board.
In the embodiment of the present invention, the maximum value may be determined as a limit electrostatic voltage value corresponding to the microphone on the PCB, where the limit electrostatic voltage value is used to indicate that the microphone on the PCB can withstand an electrostatic voltage value in an ESD test, that is, when electrostatic discharge occurs, a detected value of an electrostatic voltage on the outer surface of the microphone is compared with the limit electrostatic voltage value, and if the value exceeds the limit electrostatic voltage value, the microphone cannot be protected from static electricity in time even by a method of transferring accumulated electrostatic charges to a reference ground of the printed circuit board, that is, the normal operation of the microphone is influenced and even damaged by the electrostatic discharge with a high probability.
Further, as an implementation of the method shown in fig. 1 and fig. 2, an embodiment of the present invention provides an apparatus for performing electrostatic protection on a microphone. The embodiment of the apparatus corresponds to the embodiment of the method, and for convenience of reading, details in the embodiment of the apparatus are not repeated one by one, but it should be clear that the apparatus in the embodiment can correspondingly implement all the contents in the embodiment of the method. The device is applied to a reference ground of a printed circuit board by transferring a large amount of static charges accumulated on the outer surface of the microphone to a reference ground, and then static electricity discharge on the microphone is completed timely and efficiently without adding extra additional cost, and particularly as shown in fig. 3, the device comprises:
a monitoring unit 31 for monitoring an electrostatic voltage present on an outer surface of the microphone, the electrostatic voltage being generated according to electrostatic charges accumulated on the outer surface of the microphone;
a judging unit 32, configured to judge whether the value of the electrostatic voltage is greater than a first preset threshold;
a transfer unit 33, configured to transfer the accumulated electrostatic charges to a reference ground of the printed circuit board when the determination unit 32 determines that the value of the electrostatic voltage is greater than a first preset threshold.
Further, as shown in fig. 4, the transfer unit 33 includes:
the determining module 331 is configured to determine a ground terminal of the analog signal corresponding to the microphone on the printed circuit board;
a first connection module 332 for directly connecting the ground terminal of the analog signal with the reference ground of the printed circuit board to transfer the accumulated electrostatic charges to the reference ground of the printed circuit board;
a second connection module 333, configured to connect a ground terminal of the analog signal to a reference ground of the printed circuit board through a zero-ohm resistor, so as to transfer the accumulated electrostatic charges to the reference ground of the printed circuit board.
Further, as shown in fig. 4, the apparatus further includes:
an increasing unit 34 configured to increase an electrostatic voltage present on an outer surface of the microphone according to a preset increment value to obtain a plurality of electrostatic voltage values;
the monitoring unit 31 is further configured to monitor current values corresponding to the plurality of electrostatic voltage values when electrostatic charges accumulated on the outer surface of the microphone are discharged to generate electrostatic discharge;
the judging unit 32 is further configured to judge whether the current value is not greater than a second preset threshold;
a determining unit 35, configured to determine that the normal operation of the microphone is not affected by the electrostatic discharge when the determining unit 32 determines that the current value is not greater than a second preset threshold;
a marking unit 36, configured to mark the electrostatic voltage value corresponding to the current value as safe;
an extracting unit 37 for extracting a maximum value among the plurality of electrostatic voltage values marked as safe;
the determining unit 35 is further configured to determine the maximum number extracted by the extracting unit 37 as a limit electrostatic voltage value corresponding to the microphone on the printed circuit board.
Further, the electrostatic charge accumulated on the outer surface of the microphone at least comprises electrostatic charge generated by direct contact with the microphone and/or electrostatic charge generated by inductive electricity within a third preset threshold range from the microphone.
An embodiment of the present invention further provides an electronic device for performing electrostatic protection on a microphone, configured to perform the method for performing electrostatic protection on a microphone according to any of the foregoing embodiments, as shown in fig. 5, where the electronic device includes a processor and a memory, the monitoring unit, the determining unit, the transferring unit, and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to implement corresponding functions. Specifically, the electronic device according to the embodiment of the present invention includes:
at least one processor (processor) 41;
and at least one memory (memory)42, a bus 43 connected to the processor 41; wherein the content of the first and second substances,
the processor 41 and the memory 42 complete mutual communication through the bus 43;
the processor 41 is configured to call program instructions in the memory 42 to perform the methods provided by the above-described method embodiments. The processor 41 includes a kernel, and the kernel calls a corresponding program unit from the memory. The inner core can be set to be one or more, and the parameters of the inner core are adjusted to transfer a large amount of static charges accumulated on the outer surface of the microphone to the reference ground of the printed circuit board, so that static electricity on the microphone can be timely and efficiently discharged without adding extra additional cost.
The memory 42 may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory 42 includes at least one memory chip.
Embodiments of the present invention also provide a non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the above-mentioned method for performing electrostatic protection on a microphone.
Since the apparatus for performing electrostatic protection on a microphone described in this embodiment is an apparatus capable of performing the method for performing electrostatic protection on a microphone in the embodiment of the present invention, based on the method for performing electrostatic protection on a microphone described in the embodiment of the present invention, a person skilled in the art can understand a specific implementation manner and various variations of the apparatus for performing electrostatic protection on a microphone in this embodiment, so how to implement the method for performing electrostatic protection on a microphone in the embodiment of the present invention by the apparatus for performing electrostatic protection on a microphone is not described in detail here. The device used by those skilled in the art to implement the method for performing electrostatic protection on a microphone in the embodiments of the present invention is within the scope of the present application.
In summary, the embodiments of the present invention provide a method and an apparatus for performing electrostatic protection on a microphone. The embodiment of the invention monitors whether the static electricity discharge is generated on the microphone in real time and further judges the degree of the generated static electricity discharge by monitoring the static electricity voltage on the outer surface of the microphone in real time, and when the static electricity voltage on the outer surface of the microphone reaches a specified threshold value, the static electricity charge accumulated on the outer surface of the microphone is transferred to the reference ground of a printed circuit board in order to avoid the interference or damage of the static electricity discharge to the microphone, so that the accumulated static electricity charge can be discharged efficiently in real time. The embodiment of the invention can complete the electrostatic discharge on the microphone in time and efficiently without adding extra appearance structure design on the premise of not increasing extra additional cost so as to achieve the electrostatic protection on the microphone, simultaneously does not influence the sound receiving sensitivity of the microphone, and greatly improves the cost performance of the microphone. Furthermore, after the circuit path of electrostatic discharge is determined, the current value on the circuit path of electrostatic discharge can be monitored by a method of artificially and stepwise increasing the electrostatic voltage on the outer surface of the microphone according to a preset increment value, so as to further determine the limit electrostatic voltage value corresponding to the microphone on the PCB, and then test how much electrostatic hazard pressure the microphone can endure based on the determined electrostatic discharge circuit path, so as to determine the applicable use environment of the equipment according to the known limit electrostatic voltage value, so as to take reasonable electrostatic protection measures for the equipment in advance.
The device for performing electrostatic protection on the microphone comprises a processor and a memory, wherein the monitoring unit, the judging unit, the transferring unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The inner core can be set to be one or more than one, and the static electricity discharge on the microphone can be completed timely and efficiently on the premise of not increasing extra additional cost by adjusting the inner core parameters, so that the static electricity protection on the microphone is achieved, the sound receiving sensitivity of the microphone is not influenced, and the cost performance of the microphone is greatly improved.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
An embodiment of the present invention provides a storage medium, on which a program is stored, and when the program is executed by a processor, the method for performing electrostatic protection on a microphone is implemented.
The embodiment of the invention provides a processor, which is used for running a program, wherein the method for performing electrostatic protection on a microphone is executed when the program runs.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein the processor executes the program and realizes the following steps:
a method of electrostatic protection of a microphone, the method comprising: monitoring an electrostatic voltage present on an outer surface of a microphone, the electrostatic voltage being generated from an electrostatic charge accumulated on the outer surface of the microphone; judging whether the value of the static voltage is larger than a first preset threshold value or not; if so, transferring the accumulated electrostatic charge to a reference ground of the printed circuit board.
Further, the transferring the accumulated electrostatic charges to a reference ground of a printed circuit board includes: determining a grounding end of an analog signal corresponding to the microphone on the printed circuit board; connecting the grounding end of the analog signal directly with the reference ground of the printed circuit board so as to transfer the accumulated static charges to the reference ground of the printed circuit board; or the grounding end of the analog signal is connected with the reference ground of the printed circuit board through a zero ohm resistor so as to transfer the accumulated static charges to the reference ground of the printed circuit board.
Further, the method further comprises: increasing the electrostatic voltage existing on the outer surface of the microphone according to a preset increment value to obtain a plurality of electrostatic voltage values; when the static charges accumulated on the outer surface of the microphone are released to generate static discharge, monitoring current values corresponding to the plurality of static voltage values; judging whether the current value is not greater than a second preset threshold value or not; if so, determining that the normal operation of the microphone is not influenced by the electrostatic discharge, and marking the electrostatic voltage value corresponding to the current value as safe; extracting a maximum value from the plurality of electrostatic voltage values marked as safe; and determining the maximum value as a limit electrostatic voltage value corresponding to the microphone on the printed circuit board.
Further, the electrostatic charge accumulated on the outer surface of the microphone at least comprises electrostatic charge generated by direct contact with the microphone and/or electrostatic charge generated by inductive electricity within a third preset threshold range from the microphone.
The device herein may be a server, a PC, a PAD, a mobile phone, etc.
The present application further provides a computer program product adapted to perform program code for initializing the following method steps when executed on a data processing device: monitoring an electrostatic voltage present on an outer surface of a microphone, the electrostatic voltage being generated from an electrostatic charge accumulated on the outer surface of the microphone; judging whether the value of the static voltage is larger than a first preset threshold value or not; if so, transferring the accumulated electrostatic charge to a reference ground of the printed circuit board.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (6)
1. A method of electrostatic protection of a microphone, the method comprising:
monitoring an electrostatic voltage present on an outer surface of a microphone, the electrostatic voltage being generated from an electrostatic charge accumulated on the outer surface of the microphone;
judging whether the value of the static voltage is larger than a first preset threshold value or not;
if yes, transferring the accumulated static charges to a reference ground of the printed circuit board;
wherein the transferring the accumulated electrostatic charge to a reference ground of a printed circuit board comprises: determining a grounding end of an analog signal corresponding to the microphone on the printed circuit board; connecting the grounding end of the analog signal directly with the reference ground of the printed circuit board so as to transfer the accumulated static charges to the reference ground of the printed circuit board; or, the grounding end of the analog signal is connected with the reference ground of the printed circuit board through a zero ohm resistor so as to transfer the gathered static charges to the reference ground of the printed circuit board;
increasing the electrostatic voltage existing on the outer surface of the microphone according to a preset increment value to obtain a plurality of electrostatic voltage values;
monitoring current values corresponding to the plurality of electrostatic voltage values when electrostatic charges accumulated on the outer surface of the microphone are discharged to generate electrostatic discharge;
judging whether the current value is not greater than a second preset threshold value or not;
if so, determining that the normal operation of the microphone is not influenced by the electrostatic discharge, and marking the electrostatic voltage value corresponding to the current value as safe;
extracting a maximum value from the plurality of electrostatic voltage values marked as safe;
and determining the maximum value as a limit electrostatic voltage value corresponding to the microphone on the printed circuit board.
2. The method of claim 1, wherein the electrostatic charge accumulated on the outer surface of the microphone comprises at least an electrostatic charge induced by direct contact with the microphone and/or an electrostatic charge induced by induction at a distance from the microphone within a third preset threshold range.
3. An apparatus for electrostatic protection of a microphone, the apparatus comprising:
a monitoring unit for monitoring an electrostatic voltage present on an outer surface of a microphone, the electrostatic voltage being generated from electrostatic charges accumulated on the outer surface of the microphone;
the judging unit is used for judging whether the value of the static voltage is larger than a first preset threshold value or not;
the transfer unit is used for transferring the gathered electrostatic charges to a reference ground of the printed circuit board when the value of the electrostatic voltage is judged to be larger than a first preset threshold value;
wherein the transfer unit includes: the determining module is used for determining the grounding end of the analog signal corresponding to the microphone on the printed circuit board; the first connecting module is used for directly connecting the grounding end of the analog signal with the reference ground of the printed circuit board so as to transfer the accumulated static charges to the reference ground of the printed circuit board; the second connecting module is used for connecting the grounding end of the analog signal with the reference ground of the printed circuit board through a zero-ohm resistor so as to transfer the gathered static charges to the reference ground of the printed circuit board;
an increasing unit configured to increase an electrostatic voltage present on an outer surface of the microphone according to a preset increment value to obtain a plurality of electrostatic voltage values;
the monitoring unit is further used for monitoring current values corresponding to the plurality of electrostatic voltage values when electrostatic charges accumulated on the outer surface of the microphone are released to generate electrostatic discharge;
the judging unit is also used for judging whether the current value is not greater than a second preset threshold value;
the determining unit is used for determining that the normal operation of the microphone is not influenced by the electrostatic discharge when the judging unit judges that the current value is not larger than a second preset threshold value;
the marking unit is used for marking the electrostatic voltage value corresponding to the current value as safe;
an extraction unit for extracting a maximum value among a plurality of electrostatic voltage values marked as safe;
the determining unit is further used for determining the maximum number value extracted by the extracting unit as a limit electrostatic voltage value corresponding to the microphone on the printed circuit board.
4. The apparatus of claim 3, wherein the electrostatic charge accumulated on the outer surface of the microphone comprises at least an electrostatic charge induced by direct contact with the microphone and/or an electrostatic charge induced by induction at a distance from the microphone within a third preset threshold range.
5. An electronic device, comprising:
at least one processor;
and at least one memory, bus connected with the processor; wherein the content of the first and second substances,
the processor and the memory complete mutual communication through the bus;
the processor is configured to invoke program instructions in the memory to perform the method of claim 1 or 2 for electrostatic protection of a microphone.
6. A non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the method of electrostatically protecting a microphone according to claim 1 or 2.
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| CN201810542033.7A CN108834011B (en) | 2018-05-30 | 2018-05-30 | Method and device for performing electrostatic protection on microphone |
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| CN201810542033.7A CN108834011B (en) | 2018-05-30 | 2018-05-30 | Method and device for performing electrostatic protection on microphone |
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