CN210781259U - Portable directional noise reduction microphone for monitoring and diagnosing industrial equipment - Google Patents
Portable directional noise reduction microphone for monitoring and diagnosing industrial equipment Download PDFInfo
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- CN210781259U CN210781259U CN201922386167.7U CN201922386167U CN210781259U CN 210781259 U CN210781259 U CN 210781259U CN 201922386167 U CN201922386167 U CN 201922386167U CN 210781259 U CN210781259 U CN 210781259U
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Abstract
The embodiment of the utility model discloses a portable directional noise reduction microphone for monitoring and diagnosing industrial equipment, which comprises sound-absorbing cotton, a sound input cavity sleeved outside the sound-absorbing cotton, and a double-layer vacuum metal shell connected with the sound input cavity; the double-layer vacuum metal shell comprises a microphone element, a conical inner cavity and a microphone diaphragm, the microphone element is arranged in a double-layer vacuum metal shell space between the conical inner cavity and the sound input cavity, the conical inner cavity is adjacent to the microphone diaphragm, an output port is arranged at one end, far away from the sound input cavity, of the double-layer vacuum metal shell, and the output port is adjacent to the microphone diaphragm. The utility model adopts the sound-absorbing cotton to absorb and isolate the noise which is just opposite to the direction input, so that the target signal can be fully absorbed by the microphone diaphragm through the conical inner cavity and converted into an electric signal to be output; by adopting the double-layer vacuum metal shell, sound signals in other directions cannot penetrate through the vacuum interlayer and are greatly weakened, the transmission in other directions is reduced, and the interference on target signals is reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of microphones, in particular to a portable directional noise reduction microphone for monitoring and diagnosing industrial equipment.
Background
Various characteristic parameters of sound signals generated by object vibration and transmitted by various media on a time domain and a frequency domain usually contain a lot of information, and related information such as the performance, stability, structuredness and the like of the vibration system can be calculated and analyzed through a conventional or special targeted algorithm. Aiming at the ubiquitous mechanical vibration in engineering, the system can be subjected to fault diagnosis and analysis on the basis of understanding the working operation mechanism of the vibration system, and the operation condition and fault prejudgment of equipment can be monitored in real time. Since the collection of sound signals is non-contact collection, at present, conventional sound collection equipment mainly uses a microphone, and the microphone converts vibration signals of a sound source transmitted by sound waves into electric signals through structures such as a built-in diaphragm and a related electromagnetic coil and outputs the electric signals to a subsequent processing end. However, in many cases, besides the target sound source, the surrounding environment is also filled with various other vibration sources and noises, such as the speech sound of the staff and the audience in the lecture hall, the noise of the operation of the equipment, the noise of the operation of various equipment in the factory, and the like. How to collect sound aiming at a specific target source and eliminate the interference of other irrelevant sound sources and noise is a higher requirement on a sound collecting microphone.
The existing noise reduction microphone is roughly divided into two types, one type is mainly to utilize sound absorption cotton to fill and combine a specific cavity to play the effects of noise reduction and sound insulation, but the method is inconvenient to carry due to the large volume of the required sound absorption cotton, and has a relatively limited noise reduction effect, and especially when a plurality of sound sources which are the same as or similar to a target sound source exist in multiple directions, the microphone is difficult to realize directional acquisition and detection, and the capability of acquiring sound signals of the target sound source is limited; the other method is to use a plurality of microphones to form a special array, and utilize corresponding algorithms to perform mutual superposition, subtraction and the like on the received different sound signals, and finally extract the required signals and exclude other irrelevant signals and noise. However, the microphone is complex because a plurality of recording and calculating modules are integrated at the same time, and can only be designed for specific systems and use occasions, so that the design and production cost is high, the occupied space is relatively large, and the microphone is inconvenient to use.
Disclosure of Invention
Therefore, the embodiment of the invention provides a portable directional noise reduction microphone for monitoring, diagnosing and monitoring industrial equipment, so as to solve the problem that the acquisition of a target sound source is interfered due to the fact that the surrounding environment is also filled with various other vibration sources and noise in the prior art.
In order to achieve the above object, an embodiment of the present invention provides a portable directional noise reduction microphone for monitoring, diagnosing and monitoring industrial equipment, the microphone utilizes a combination of a vacuum interlayer and sound-absorbing cotton, directionally collects signals within a certain angle range through a semi-enclosed structure, and isolates or absorbs most of sound signals in other directions. The specific technical scheme is as follows:
the portable directional noise reduction microphone for monitoring and diagnosing industrial equipment, which is provided by the embodiment 1 of the invention, comprises sound absorption cotton (1), a sound input cavity (2) sleeved outside the sound absorption cotton (1), and a double-layer vacuum metal shell (3) connected with the sound input cavity (2); double-deck vacuum metal casing (3) are including microphone component (4), toper inner chamber (5) and microphone diaphragm (6), microphone component (4) set up toper inner chamber (5) with in double-deck vacuum metal casing (3) space between sound input chamber (2), toper inner chamber (5) with microphone diaphragm (6) are adjacent, the one end that sound input chamber (2) were kept away from in double-deck vacuum metal casing (3) is provided with output port (7), output port (7) with microphone diaphragm (6) are adjacent.
Furthermore, the sound-absorbing cotton (1) is in a shape of a sawtooth edge cone.
Further, the double-layer vacuum metal shell (3) is made of aluminum materials.
Furthermore, the microphone diaphragm (6) is electrically connected with the electromagnetic coil, the vibration processing circuit and the electric signal conversion circuit in sequence.
Further, the device also comprises a communication circuit and a CPU, wherein the CPU is electrically connected with the communication circuit and an output port (7).
Further, the communication circuit is a wireless communication circuit for sending the output signal to a background.
The embodiment of the invention has the following advantages:
the portable directional noise reduction microphone for monitoring and diagnosing industrial equipment, which is provided by the embodiment 1 of the invention, comprises sound absorption cotton, a sound input cavity sleeved outside the sound absorption cotton, and a double-layer vacuum metal shell connected with the sound input cavity; the double-layer vacuum metal shell comprises a microphone element, a conical inner cavity and a microphone diaphragm, wherein the microphone element is arranged in the conical inner cavity and a double-layer vacuum metal shell space between the sound input cavities, the conical inner cavity is adjacent to the microphone diaphragm, an output port is arranged at one end, far away from the sound input cavities, of the double-layer vacuum metal shell, and the output port is adjacent to the microphone diaphragm. On one hand, the sound-absorbing cotton is adopted to absorb and isolate the noise input in the opposite direction, so that the target signal can be fully absorbed by the microphone membrane through the conical inner cavity and converted into an electric signal to be output; meanwhile, the double-layer vacuum metal shell is adopted, so that sound signals in other directions cannot penetrate through the vacuum interlayer and are greatly weakened, the transmission in other directions is reduced, and the interference on target signals is reduced.
Furthermore, the sound-absorbing cotton in embodiment 1 of the present invention is in a shape of a saw-tooth edge cone, and can weaken the echo of a port signal through a saw-tooth design structure, and sound waves in other directions cannot be transmitted normally as sound waves in the front, so that noise reduction and collection of sound signals in a certain elevation angle range on the front and the opposite sides are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope of the present invention.
Fig. 1 is a schematic structural diagram of a portable directional noise reduction microphone for monitoring and diagnosing industrial equipment according to embodiment 1 of the present invention;
in the figure: 1: sound-absorbing cotton; 2: a sound input cavity; 3: a double-layer vacuum metal housing; 4: a microphone element; 5: a conical lumen; 6: a microphone diaphragm; 7: and (6) an output port.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a schematic structural view of a portable directional noise reduction microphone for monitoring and diagnosing industrial equipment according to embodiment 1 of the present invention includes a sound-absorbing cotton (1), a sound input cavity (2) sleeved outside the sound-absorbing cotton (1), and a double-layer vacuum metal housing (3) connected to the sound input cavity (2); double-deck vacuum metal casing (3) are including microphone component (4), toper inner chamber (5) and microphone diaphragm (6), microphone component (4) set up toper inner chamber (5) with in double-deck vacuum metal casing (3) space between sound input chamber (2), toper inner chamber (5) with microphone diaphragm (6) are adjacent, the one end that sound input chamber (2) were kept away from in double-deck vacuum metal casing (3) is provided with output port (7), output port (7) with microphone diaphragm (6) are adjacent.
On one hand, the sound-absorbing cotton is adopted to absorb and isolate the noise input in the opposite direction, so that the target signal can be fully absorbed by the microphone membrane through the conical inner cavity and converted into an electric signal to be output; meanwhile, the double-layer vacuum metal shell is adopted, so that sound signals in other directions cannot penetrate through the vacuum interlayer and are greatly weakened, the transmission in other directions is reduced, and the interference on target signals is reduced.
Further, the optional embodiment of the invention also comprises that the sound-absorbing cotton (1) is in a shape of a sawtooth edge cone.
The sound-absorbing cotton in embodiment 1 of the invention adopts a saw-tooth edge cone, echoes of port signals can be weakened through a saw-tooth design structure, and sound waves in other directions cannot be transmitted normally like sound waves on the front side, so that noise reduction and collection of sound signals in a certain elevation angle range on the front side and the opposite side are realized.
Furthermore, the microphone diaphragm (6) is electrically connected with the electromagnetic coil, the vibration processing circuit and the electric signal conversion circuit in sequence.
Further, the device also comprises a communication circuit and a CPU, wherein the CPU is electrically connected with the communication circuit and an output port (7).
Further, the communication circuit is a wireless communication circuit for sending the output signal to a background.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (6)
1. A portable directional noise reduction microphone for monitoring and diagnosing industrial equipment is characterized by comprising sound absorption cotton (1), a sound input cavity (2) sleeved outside the sound absorption cotton (1), and a double-layer vacuum metal shell (3) connected with the sound input cavity (2); double-deck vacuum metal casing (3) are including microphone component (4), toper inner chamber (5) and microphone diaphragm (6), microphone component (4) set up toper inner chamber (5) with in double-deck vacuum metal casing (3) space between sound input chamber (2), toper inner chamber (5) with microphone diaphragm (6) are adjacent, the one end that sound input chamber (2) were kept away from in double-deck vacuum metal casing (3) is provided with output port (7), output port (7) with microphone diaphragm (6) are adjacent.
2. Microphone according to claim 1, characterized by the fact that the sound-absorbing cotton (1) is in the shape of a saw-tooth-edged cone.
3. Microphone according to claim 1, characterized by the fact that the double-layer vacuum metal casing (3) is made of aluminum material.
4. The microphone according to claim 1, further comprising an electromagnetic coil, a vibration processing circuit and an electric signal conversion circuit, wherein the microphone membrane (6) is electrically connected with the electromagnetic coil, the vibration processing circuit and the electric signal conversion circuit in sequence.
5. The microphone according to claim 4, further comprising a communication circuit and a CPU, the CPU being electrically connected to the communication circuit and an output port (7).
6. The microphone of claim 5, wherein the communication circuit is a wireless communication circuit for sending the output signal to a background.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922386167.7U CN210781259U (en) | 2019-12-26 | 2019-12-26 | Portable directional noise reduction microphone for monitoring and diagnosing industrial equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922386167.7U CN210781259U (en) | 2019-12-26 | 2019-12-26 | Portable directional noise reduction microphone for monitoring and diagnosing industrial equipment |
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| CN210781259U true CN210781259U (en) | 2020-06-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114390413A (en) * | 2021-12-30 | 2022-04-22 | 深圳市爱林瑞电子有限公司 | Piezoelectric microphone with high sensitivity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114390413A (en) * | 2021-12-30 | 2022-04-22 | 深圳市爱林瑞电子有限公司 | Piezoelectric microphone with high sensitivity |
| CN114390413B (en) * | 2021-12-30 | 2023-08-22 | 深圳市鑫启辉科技发展有限公司 | Piezoelectric microphone with high sensitivity |
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