CN117336585A - Image pickup device and system with heat preservation and frost prevention functions - Google Patents
Image pickup device and system with heat preservation and frost prevention functions Download PDFInfo
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- CN117336585A CN117336585A CN202311341526.1A CN202311341526A CN117336585A CN 117336585 A CN117336585 A CN 117336585A CN 202311341526 A CN202311341526 A CN 202311341526A CN 117336585 A CN117336585 A CN 117336585A
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- glass
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- frost prevention
- temperature
- heat preservation
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- 230000002265 prevention Effects 0.000 title claims abstract description 23
- 238000004321 preservation Methods 0.000 title claims abstract description 17
- 239000011521 glass Substances 0.000 claims abstract description 81
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 17
- 238000010926 purge Methods 0.000 claims abstract description 14
- 238000009423 ventilation Methods 0.000 claims abstract description 12
- 238000003384 imaging method Methods 0.000 claims description 17
- 238000009413 insulation Methods 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 238000005286 illumination Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 4
- 239000002912 waste gas Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- 239000005304 optical glass Substances 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/52—Elements optimising image sensor operation, e.g. for electromagnetic interference [EMI] protection or temperature control by heat transfer or cooling elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/51—Housings
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Accessories Of Cameras (AREA)
- Studio Devices (AREA)
Abstract
The invention provides an image pickup device with heat preservation and frost prevention functions, which comprises: the front end of the device cavity is provided with a photographing window which is of a double-layer light-transmitting glass structure; the camera module is arranged on a mounting seat in the device cavity, and is provided with a heating unit and a preset temperature measuring point; the temperature control module is connected with the heating unit and is arranged at the temperature measuring point, and is used for uploading temperature information acquired from the temperature measuring point to the processing terminal and controlling the heating unit to work according to a control instruction fed back by the processing terminal; and the ventilation and purging module is arranged on the shell of the device cavity and is used for ventilating the device cavity so as to reduce the air humidity in the device cavity. Therefore, the image pickup device has the functions of heat preservation and frost prevention, and is suitable for high-wind-speed low-temperature environments.
Description
Technical Field
The invention relates to the technical field of image pickup, in particular to an image pickup device and system with a heat preservation and frost prevention function.
Background
With the development of camera monitoring technology, more and more industry fields introduce image measurement technology, and through various transmission ways, human beings can observe and analyze special environments (such as toxic, high temperature, high pressure, radiation, low temperature, high wind speed and other extreme environments) which cannot be accessed originally and special scenes (such as the experimental state of an aircraft) which cannot be seen, and further realize the observation and analysis of the special environments.
Currently, the camera shooting monitoring technology is successfully applied to the technical field of aviation ground tests. Besides obtaining and determining the flight state of the spacecraft through remote and external measurement parameter data, the designer can also see the test state of the aircraft simulation part in real time, clearly and intuitively through a camera monitoring device arranged in the test device. The general camera device is suitable for working in normal temperature (-20 ℃ to 45 ℃) normal pressure environment, and the environment simulation test conditions of the ground aircraft are high wind speed and low temperature (-196 ℃ to 50 ℃), so that the phenomena of fog and frost formation and frost damage of a camera can occur on a lens of the general camera device, and the imaging effect of the camera device is directly influenced.
When the camera works in high-wind speed and low-temperature environments, firstly, the temperature of the camera is low, and secondly, the camera is easy to cool, and the high-wind speed enables the convection heat exchange coefficient between the camera and the outside to be large, so that the heat dissipation of the camera is increased, and therefore, the camera needs to be thermally protected. The water content of air or nitrogen in the environment cannot be very low, and because the extreme temperature of the environment is too low, a temperature difference exists between the camera device and the environment, and frost is formed when the temperature of a lens of the camera device is lower than the dew point of the environment. Therefore, an imaging device with a heat preservation and frost prevention function suitable for a high-wind-speed low-temperature environment is needed to solve the imaging monitoring problem in the high-wind-speed low-temperature environment.
In summary, the conventional method has many problems in practical use, so that improvement is necessary.
Disclosure of Invention
In view of the above-mentioned drawbacks, the present invention aims to provide an imaging device and system with a thermal insulation and frost prevention function, which are suitable for a high wind speed and low temperature environment.
In order to achieve the above object, the present invention provides an image pickup apparatus having a thermal insulation and frost prevention function, comprising:
the front end of the device cavity is provided with a photographing window which is of a double-layer light-transmitting glass structure;
the camera module is arranged on a mounting seat in the device cavity, and is provided with a heating unit and a preset temperature measuring point;
the temperature control module is connected with the heating unit and is arranged at the temperature measuring point, and is used for uploading temperature information acquired from the temperature measuring point to the processing terminal and controlling the heating unit to work according to a control instruction fed back by the processing terminal;
and the ventilation and purging module is arranged on the shell of the device cavity and is used for ventilating the device cavity so as to reduce the air humidity in the device cavity.
Optionally, the double-layer light-transmitting glass structure comprises outer layer glass and inner layer glass, the inner layer glass is encapsulated at the front end opening of the device cavity, and the outer layer glass and the inner layer glass are opposite to each other and are arranged at intervals through a glass supporting ring.
Optionally, the glass support ring is disposed on a ring side surface of the outer layer glass and the inner layer glass, so as to space the outer layer glass and the inner layer glass apart, and a side surface of the glass support ring is a space upright column structure.
Optionally, the outer layer glass and the inner layer glass are high light transmission optical glass.
Optionally, a polytetrafluoroethylene gasket for sealing and insulating heat is arranged between the inner glass and the front end opening of the device cavity.
Optionally, the camera also comprises a front end flange for equipment installation, and the front end flange is arranged on the outer end surface of the camera window.
Optionally, the ventilation purging module includes an air inlet pipeline and an air outlet pipeline, the air inlet pipeline is communicated with the inside of the device cavity so as to purge normal-temperature pure nitrogen to the inside of the device cavity, and the air outlet pipeline is communicated with the inside of the device cavity so as to discharge waste gas in the device cavity.
Optionally, the device cavity comprises a rear end cover made of glass fiber reinforced plastic material, and the outer layer of the rear end cover and the inner layer of the device cavity are arranged as heat-proof layers; and/or
The outer shell of the device cavity is made of an aluminum alloy material; and/or
The shell surface of the device cavity is adhered with a heat insulation material for reducing heat loss.
Optionally, the device further comprises an illumination module, wherein the illumination module is arranged in a front end area in the device cavity and is used for illuminating outwards through the camera window; and/or
The processing terminal is a computer, and the computer is connected with the temperature control module through an aviation plug on the device cavity, so as to feed back the control instruction to the temperature control module through PID algorithm according to the temperature information received from the temperature control module.
Optionally, the device cavity is of a cylindrical barrel structure.
The invention relates to a camera device with a heat preservation and frost prevention function, which at least comprises a device cavity, a camera module, a temperature control module and a ventilation and blowing module, wherein the front end of the device cavity is provided with a camera window which is of a double-layer light-transmitting glass structure; the camera module is arranged on an installation seat in the cavity of the device and is provided with a heating unit and a preset temperature measuring point; the temperature control module is connected with the heating unit and is arranged at the temperature measuring point, and is used for uploading temperature information acquired from the temperature measuring point to the processing terminal and controlling the heating unit to work according to a control instruction fed back by the processing terminal; the ventilation and purging module is arranged on the shell of the device cavity and is used for ventilating the device cavity so as to reduce the air humidity in the device cavity. Therefore, the image pickup device has the functions of heat preservation and frost prevention, and is suitable for high-wind-speed low-temperature environments.
Drawings
Fig. 1 is a cross-sectional view of an image capturing device with a thermal insulation and frost prevention function according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of the image capturing device with a thermal insulation and frost prevention function according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It should be noted that references in the specification to "one embodiment," "an example embodiment," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Furthermore, such phrases are not intended to refer to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
Furthermore, certain terms are used throughout the specification and the claims that follow to refer to particular components or parts, and it will be understood by those of ordinary skill in the art that manufacturers may refer to a component or part by different terms or terminology. The present specification and the following claims do not take the form of an element or component with the difference in name, but rather take the form of an element or component with the difference in function as a criterion for distinguishing. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The term "coupled," as used herein, includes any direct or indirect electrical connection. Indirect electrical connection means include connection via other devices.
Fig. 1 to fig. 2 show an imaging device with a heat preservation and frost prevention function according to an embodiment of the present invention, where the imaging device may be adapted to work in a high wind speed low temperature environment, such as an aviation ground test environment, an aerial high speed flight environment of an aircraft, etc.; the camera device comprises a device cavity 10, a camera module 20, a temperature control module 30 and a ventilation and purging module, wherein:
the front end of the device cavity 10 is provided with a camera window 101, and the camera window 101 is of a double-layer light-transmitting glass structure; the camera module 20 is arranged on a mounting seat 201 in the device cavity 10, and the camera module 20 is provided with a heating unit 202 and a preset temperature measuring point; the temperature control module 30 is connected with the heating unit 202 and is installed at the temperature measuring point, and is used for uploading temperature information acquired from the temperature measuring point to a processing terminal and controlling the heating unit 202 to work according to a control instruction fed back by the processing terminal; the ventilation and purging module is arranged on the shell of the device cavity 10 and is used for ventilating the device cavity 10 to reduce the air humidity in the device cavity 10. Namely, the camera module 20 is encapsulated in the device cavity 10 and performs camera shooting through a camera window 101 at the front end of the device cavity 10; in specific implementation, the temperature information of the temperature measuring point of the camera module 20 is collected by the temperature control module 30 in the working process and is uploaded to the processing terminal, if the processing terminal judges that the temperature information is too low, a control instruction is sent to the temperature control module to enable the temperature control module 30 to control the heating unit 202 to work, and when the heating unit 202 works, heat is generated to raise the environmental temperature of the camera module 20, so that the problem of failure of the camera module 20 caused by low temperature is avoided; meanwhile, the temperature rise can also prevent the imaging module 20 from frosting; meanwhile, the ventilation purge module can be used to exhaust low temperature air inside the device cavity 10 to prevent frosting.
The device cavity 10 is preferably of a cylindrical barrel structure, and each functional module is compactly and reasonably arranged in the device cavity 10, so that the volume of the camera device is reduced, and the camera device is convenient to install. The camera module 20 is fixedly arranged on a mounting seat 201 in the device cavity 10, the mounting seat 201 is also provided with an arc hole structure, and the camera module 20 can manually adjust the angle of a camera lens through the arc hole structure of the mounting seat 201; the heating unit 202 of the present embodiment may be an electric heating plate.
The double-layer light-transmitting glass structure 101 of the present embodiment includes an outer layer glass and an inner layer glass, and the outer layer glass and the inner layer glass are preferably high-light-transmitting optical glass; as the name suggests, the inner glass is close to the device cavity 10, and the outer glass is far away from the device cavity 10; specifically, the inner glass is sealed at the front end opening of the device cavity 10, and the outer glass is arranged opposite to the inner glass at intervals through the glass supporting ring 102. Because the outer layer glass and the inner layer glass are distributed at intervals, a certain interval space exists between the outer layer glass and the inner layer glass, the outermost layer glass is in direct contact with air flow, the air flow velocity is maximum, and the inner layer glass on the inner side is relatively smaller in air flow velocity due to the effect of the glass supporting ring 102, so that the convection heat exchange coefficient of the inner layer glass is smaller than that of the outer layer glass, the temperature gradient between the front end of the camera module 20 and the outer layer glass can be reduced, and the heat dissipation speed is reduced.
As shown, the glass support ring 102 is disposed on the ring sides of the outer and inner glasses for spacing the outer and inner glasses, and the glass support ring sides are of a spaced pillar structure. The device cavity 10 of the present embodiment is a cylindrical barrel structure, and the double-layer transparent glass structure 101 is also preferably cylindrical; specifically, the facing size areas of the outer glass and the inner glass are consistent, and the glass supporting ring 102 is arranged on the outer arc side of the outer glass and the inner glass and is used for supporting and fixing the outer glass and the inner glass; the spaced columns on the outer side of the glass support ring 102 are structurally spaced by a plurality of columns to form through holes between the columns, and the through holes are spaced on the outer side of the glass support ring 102, so that the air flow passing through the through holes on the outer side of the glass support ring 102 is much smaller than the air flow passing through the outer surface of the outer glass, and the convection heat exchange coefficient of the inner glass is smaller than that of the outer glass, thereby reducing the temperature gradient between the front end of the camera module 20 and the outer glass, and further reducing the heat dissipation speed.
Optionally, a gasket made of polytetrafluoroethylene material for sealing and insulating heat is arranged between the inner glass and the front end opening of the device cavity 10, so as to prevent heat from being dissipated from the housing of the device cavity 10.
The embodiment also comprises a front end flange 103 for equipment installation, wherein the front end flange 103 is arranged on the outer end surface of the camera window; as shown in the figure, the front end flange 103 has an annular structure, the middle opening position is used for installing the outer glass, and the front end flange 103 is fixedly connected with the glass supporting ring 102 in a fastening way, a screwing way and other fixing ways; the front flange 103 is specifically used for installing and fixing the camera device on an external device, for example, the whole camera device is connected to a test device installation position through the front flange 103; in particular, the front flange 103 is flush with the outer surface of the outer glass layer, so that the front flange 103 can be flush with the inner surface of the test equipment, and no reverse airflow step is generated.
The ventilation and purging module in this embodiment includes an air inlet pipeline 401 and an air outlet pipeline 402, where the air inlet pipeline 401 is communicated with the inside of the device cavity 10 to purge normal temperature pure nitrogen gas to the inside of the device cavity 10, so as to replace air in the device cavity 10, and the air outlet pipeline 402 is communicated with the inside of the device cavity 10 to be used for discharging waste gas in the device cavity 10, that is, air in the cavity of the device cavity 10, which is extruded and discharged due to normal temperature pure nitrogen gas purged by the air inlet pipeline 401, and after the waste gas is discharged, air moisture in the device cavity 10 can be effectively reduced, so as to reduce the risk of frosting of the camera module 20.
The device cavity 10 comprises a rear end cover 104 made of glass fiber reinforced plastic material, wherein the outer layer of the rear end cover 104 and the inner layer of the device cavity 10 are provided with a heat-proof layer 60; the heat-proof layer 60 has a characteristic of poor heat conduction performance and no cracking at low air pressure, so that the heat-proof layer can play a role in heat insulation and preservation. The ventilation and purging module is specifically mounted on the heat protection layer 60 on the outer layer of the rear end cover 104. The outer housing of the device cavity 10 is made of an aluminum alloy material, preferably an aluminum alloy material with excellent mechanical properties at low temperatures.
Optionally, a thermal insulation material for reducing heat loss is adhered to the outer shell surface of the device cavity 10, and the thermal insulation material can effectively reduce heat loss at low temperature; preferably, a heating unit for providing a heat source, such as an electric heating plate, etc., is also mounted on the inner wall of the device chamber 10.
The present embodiment further includes an illumination module 50, where the illumination module 50 is disposed in a front end region of the device cavity 10 for illuminating outwards through the image capturing window 101.
In an alternative embodiment, the processing terminal is a computer, and the computer is connected to the temperature control module through an avionic plug on the device cavity, so as to feed back the control instruction to the temperature control module through a PID algorithm according to the temperature information received from the temperature control module 30.
Of course, in other embodiments, the processing terminal may also be a processing module built in the device cavity 10, and execute a corresponding temperature control instruction based on the temperature information uploaded by the temperature control module 30 by using a pre-configured control logic rule.
In conclusion, the camera device has the advantages of compact structure, small volume, simple and convenient installation process, ingenious internal structural design and high reliability; through double glazing, temperature control module and protection module combine together, cooperate high-purity nitrogen gas to sweep, make camera device have heat preservation and frost prevention's function, through experimental verification, antifog frost effect is good, and imaging quality is clear, satisfies aircraft bottom surface test demand, is applicable to high wind speed low temperature environment.
Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention, as will be apparent to those skilled in the art, without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. An image pickup device with heat preservation and frost prevention functions is characterized by comprising:
the front end of the device cavity is provided with a photographing window which is of a double-layer light-transmitting glass structure;
the camera module is arranged on a mounting seat in the device cavity, and is provided with a heating unit and a preset temperature measuring point;
the temperature control module is connected with the heating unit and is arranged at the temperature measuring point, and is used for uploading temperature information acquired from the temperature measuring point to the processing terminal and controlling the heating unit to work according to a control instruction fed back by the processing terminal;
and the ventilation and purging module is arranged on the shell of the device cavity and is used for ventilating the device cavity so as to reduce the air humidity in the device cavity.
2. The imaging device with the heat preservation and frost prevention function according to claim 1, wherein the double-layer light-transmitting glass structure comprises outer-layer glass and inner-layer glass, the inner-layer glass is packaged at the front end opening of the device cavity, and the outer-layer glass and the inner-layer glass are arranged at right intervals through a glass supporting ring.
3. The imaging device with a thermal insulation and frost prevention function according to claim 2, wherein the glass support ring is disposed on ring sides of the outer glass and the inner glass for spacing the outer glass and the inner glass, and the glass support ring has a spacing pillar structure on a side thereof.
4. The image pickup apparatus having a heat preservation and frost prevention function according to claim 2, wherein the outer glass and the inner glass are high light transmission optical glass.
5. The imaging device with the heat preservation and frost prevention function according to claim 2, wherein a polytetrafluoroethylene material gasket for sealing and heat insulation is arranged between the inner glass and the front end opening of the device cavity.
6. The imaging apparatus with a thermal insulation and frost prevention function according to claim 1, further comprising a front flange for installation of equipment, wherein the front flange is provided on an outer end surface of the imaging window.
7. The imaging device with a thermal insulation and frost prevention function according to claim 1, wherein the ventilation and purging module comprises an air inlet pipeline and an air outlet pipeline, the air inlet pipeline is communicated with the interior of the device cavity for purging normal-temperature pure nitrogen gas into the device cavity, and the air outlet pipeline is communicated with the interior of the device cavity for exhausting waste gas in the device cavity.
8. The imaging device with the heat preservation and frost prevention function according to claim 1, wherein the device cavity comprises a rear end cover made of glass fiber reinforced plastic material, and the outer layer of the rear end cover and the inner layer of the device cavity are arranged as heat-resistant layers; and/or
The outer shell of the device cavity is made of an aluminum alloy material; and/or
The shell surface of the device cavity is adhered with a heat insulation material for reducing heat loss.
9. The imaging device with thermal and frost protection according to claim 1, further comprising an illumination module disposed in a front end region within the device cavity for illuminating outward through the imaging window; and/or
The processing terminal is a computer, and the computer is connected with the temperature control module through an aviation plug on the device cavity, so as to feed back the control instruction to the temperature control module through PID algorithm according to the temperature information received from the temperature control module.
10. The image pickup apparatus having a heat preservation and frost prevention function according to any one of claims 1 to 9, wherein the apparatus chamber has a cylindrical barrel structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311341526.1A CN117336585A (en) | 2023-10-17 | 2023-10-17 | Image pickup device and system with heat preservation and frost prevention functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311341526.1A CN117336585A (en) | 2023-10-17 | 2023-10-17 | Image pickup device and system with heat preservation and frost prevention functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117336585A true CN117336585A (en) | 2024-01-02 |
Family
ID=89291497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311341526.1A Pending CN117336585A (en) | 2023-10-17 | 2023-10-17 | Image pickup device and system with heat preservation and frost prevention functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117336585A (en) |
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2023
- 2023-10-17 CN CN202311341526.1A patent/CN117336585A/en active Pending
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