CN111679377A - Optical fiber butt joint equipment - Google Patents
Optical fiber butt joint equipment Download PDFInfo
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- CN111679377A CN111679377A CN202010652166.7A CN202010652166A CN111679377A CN 111679377 A CN111679377 A CN 111679377A CN 202010652166 A CN202010652166 A CN 202010652166A CN 111679377 A CN111679377 A CN 111679377A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/073—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an out-of-service signal
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- Optics & Photonics (AREA)
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Abstract
The embodiment of the application discloses optical fiber docking equipment, including the casing, be located optical fiber docking device in the casing and be located control element in the casing, wherein, optical fiber docking device includes optical fiber docking element, a plurality of circuit docking element and a plurality of rope way docking element, in this optical fiber docking equipment, optical fiber docking element and control element encapsulation are in same casing to improve optical fiber docking equipment's integrated level, thereby need not to carry two independent devices, and then make optical fiber docking equipment in this application be convenient for transport, moreover, when specifically using this optical fiber docking equipment, only need open optical fiber docking equipment's switch can, and need not to connect optical fiber docking element and control element when using at every turn, so that optical fiber docking equipment in this application convenient to use.
Description
Technical Field
The application relates to the technical field of optical fiber communication, in particular to optical fiber docking equipment.
Background
With the rapid development of power grid construction and the continuous improvement of the automation degree of power system equipment, the optical fiber power communication network is also developed unprecedentedly.
At present, as a basic carrier network for optical fiber communication transmission, an optical fiber network still has an original manual mode of operation and maintenance, that is, a manual operation is usually required to perform a fiber jumping operation on site to realize a docking exchange between different optical fibers. However, due to the influence of many factors such as geographical location dispersion and the complexity of manual switching operation, such manual operation in daily life is heavy and time-consuming, and therefore, how to implement automatic butt-joint switching of optical fiber cores becomes a very important concern.
For the problem, the prior art shows that the multiple optical fibers can be integrated in the same butt-joint switching device, and the butt joint of the multiple optical fibers in the optical fiber network is realized through automatic control, so that the data information exchange and transmission in the multiple optical fibers are realized. However, in the existing optical fiber docking network, the optical fiber docking device and the control device thereof are two independent devices, which is inconvenient to transport and use.
Disclosure of Invention
In order to solve the above technical problem, an embodiment of the present application provides an optical fiber docking device, so as to improve an integration level of the optical fiber docking device itself, and facilitate transportation and use of the optical fiber docking device.
In order to solve the above problem, the embodiment of the present application provides the following technical solutions:
a fiber optic docking device, comprising:
a housing;
the optical fiber docking device is positioned in the shell and comprises an optical fiber docking element, a plurality of line docking elements and a plurality of rope docking elements, wherein the line docking elements are used for docking with external optical fibers, and the rope docking elements are used for docking different line docking elements through the optical fiber docking elements;
and the control element is positioned in the shell and used for controlling the rope path butting element to realize butting of different line butting elements.
Optionally, the method further includes:
and the fiber distribution element is positioned in the shell and used for fixing the external optical fiber to realize the butt joint of the external optical fiber and the line butt joint element.
Optionally, the fiber distribution element is interfaced with the plurality of line interfacing elements by a connection line set, the connection line set comprising a first connection line set interfacing the external optical fibers with the line interfacing elements.
Optionally, the connection line set further includes: a second set of connection lines for docking with another fiber docking device.
Optionally, the method further includes:
a test element located within the housing for detecting a signal transmission quality of the external optical fiber.
Optionally, the control element is further configured to start the test element in a test stage, control the test element to detect the signal transmission quality of the external optical fiber, and close the test element in an operation stage.
Optionally, if the optical fiber docking device includes a control element, a fiber distribution element, and a test element, the optical fiber docking device includes a first accommodating space, a second accommodating space, and a third accommodating space, where the first accommodating space and the second accommodating space are arranged along a first direction, an entirety of the first accommodating space and the second accommodating space is arranged along a second direction, and the first direction and the second direction are perpendicular to each other;
the first accommodating space is used for placing the control element, the second accommodating space is used for placing the test element, and the third accommodating space is used for placing the fiber distribution element.
Optionally, the control element has a power switch, and is configured to control an operating state of the optical fiber docking device under external triggering.
Optionally, the working state of the optical fiber docking device includes at least two of a running state, a testing state and a closing state.
Optionally, the control module further has a display element interface for connecting a display element to display the preset information through the display element.
Compared with the prior art, the technical scheme has the following advantages:
the optical fiber docking equipment provided by the embodiment of the application comprises a shell, an optical fiber docking device and a control element, wherein the optical fiber docking device is arranged in the shell, the control element is arranged in the shell, the optical fiber docking device comprises an optical fiber docking element, a plurality of circuit docking elements and a plurality of rope circuit docking elements, accordingly, the optical fiber docking element and the control element are packaged in the same shell, the integration level of the optical fiber docking equipment is improved, two independent devices are not required to be carried, the optical fiber docking equipment in the application is convenient to transport, in addition, when the optical fiber docking equipment is specifically used, only a power switch of the optical fiber docking equipment needs to be turned on, the optical fiber docking element and the control element do not need to be connected when the optical fiber docking equipment is used at every time, and the optical fiber docking equipment in the application is convenient to use.
Drawings
In order to more clearly illustrate the embodiments of the present application 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 is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front view of a fiber optic docking device provided in one embodiment of the present application;
FIG. 2 is a perspective block diagram of the fiber docking device provided in FIG. 1;
FIG. 3 is a top view of a fiber docking device provided in accordance with another embodiment of the present application;
FIG. 4 is a perspective view of a control component, a test component, and a fiber distribution component of a fiber docking device according to an embodiment of the present disclosure;
FIG. 5 is an enlarged view of a control element in the fiber docking device provided in FIG. 4;
FIG. 6 is a top view of a fiber docking device provided in accordance with yet another embodiment of the present application;
FIG. 7 is an enlarged view of a test element in the fiber docking apparatus provided in FIG. 4;
FIG. 8 is a front view of a control element provided in one embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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 application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited to the specific embodiments disclosed below.
As described in the background section, in the existing optical fiber docking network, the optical fiber docking device and the control device thereof are two independent devices, which are inconvenient to transport and use.
In view of this, the present application provides an optical fiber docking device, as shown in fig. 1 and 2, including:
a housing 1;
an optical fiber docking device 2 located in the housing 1, the optical fiber docking device 2 comprising an optical fiber docking element, a plurality of line docking elements and a plurality of rope docking elements, wherein the line docking elements are used for docking with external optical fibers, and the rope docking elements are used for docking different line docking elements through the optical fiber docking elements;
a control element (i.e. a central control module) 3 positioned in the housing 1, wherein the control element 3 is used for controlling the rope path docking element to realize the docking of different line docking elements.
It should be noted that, because the related structure and operation process of the optical fiber docking element are well known to those skilled in the art, reference may be made to the prior arts such as patent documents 201611249051.3, 200910139737.0, 200920162041.5, 201310334935.9, 200910139782.6 and 200910139763. X, and the detailed description of the present application is omitted here.
It should be further noted that, in this embodiment of the present application, the optical fiber docking device further includes a manipulator, and the manipulator is configured to clamp the line docking element, so as to implement docking and separation of the line docking element and the optical fiber docking element.
The optical fiber docking equipment provided by the embodiment of the application comprises a shell 1, an optical fiber docking device 2 positioned in the shell 1 and a control element 3 positioned in the shell 1, wherein, the optical fiber docking device 2 comprises an optical fiber docking element, a plurality of line docking elements and a plurality of rope docking elements, therefore, in the present application, the optical fiber docking element and the control element 3 are packaged in the same housing 1 to improve the integration level of the optical fiber docking equipment, thereby two independent devices are not needed to be carried, the optical fiber butt joint equipment in the application is convenient to transport, and in addition, when the optical fiber docking equipment is used specifically, only the power switch of the optical fiber docking equipment is needed to be turned on, without the need to re-connect the fibre docking element with the control element 3 each time it is used, so that the fibre docking device of the present application is easy to use.
Taking the example that the plurality of line docking elements include a first line docking element and a second line docking element, the implementation of signal exchange between the external optical fiber a and the external optical fiber B is described below, specifically, the first line docking element is configured to dock with the external optical fiber a, the second line docking element is configured to dock with the external optical fiber B, and the first line docking element and the second line docking element are configured to dock through the rope docking element, so that the exchange of signals transmitted by the external optical fiber a and signals transmitted by the external optical fiber B can be implemented. In other embodiments of the present application, the plurality of line docking elements may further include a third line docking element, a fourth line docking element, and so on, which is not limited in this application, as the case may be.
On the basis of any of the above embodiments, in an embodiment of the present application, as shown in fig. 3, 4 and 5, the optical fiber docking device further includes a fiber distribution element 4 located in the housing 1, where the fiber distribution element 4 is used for fixing the external optical fiber and enabling the external optical fiber to be docked with the line docking element.
On the basis of the above-described embodiments, in one embodiment of the present application, as shown in fig. 4, the fiber distribution element 4 is butted with the plurality of line butting elements through a connection line set, and the connection line set includes a first connection line set 5 for butting the external optical fibers with the line butting elements, that is, one end of the first connection line set 5 is connected with the line butting elements, and the other end is butted with the external optical fibers through the fiber distribution element 4.
It should be noted that, the number of external optical fibers that can be docked by a single optical fiber docking device is relatively limited, for example, when signal exchange of more external optical fibers needs to be implemented, a larger number of external optical fibers need to be docked, and a single optical fiber docking device cannot be implemented, taking as an example that the optical fiber docking device can dock 24 external optical fibers, when the optical fiber docking device is applied to an application scenario of docking 48 external optical fibers, a single optical fiber docking device cannot be implemented, and in view of this, on the basis of the above-mentioned embodiment, in an embodiment of the present application, as shown in fig. 4, the connection line group further includes: and the second connecting line group 6 is used for being butted with another optical fiber butting device so as to realize the butting of more external optical fibers through the matching of at least two optical fiber butting devices, thereby realizing the capacity expansion of the optical fiber butting device.
On the basis of any of the above embodiments, in an embodiment of the present application, as shown in fig. 4, 6, and 7, the fiber docking apparatus further includes: a test element (i.e., a test module) 7 located within the housing 1, the test element 7 being used to test the signal transmission quality of the external optical fiber.
The following description will proceed with the detection of the signal transmission quality of the external optical fiber a and the external optical fiber B by taking as an example that the plurality of line splicing elements include a first line splicing element and a second line splicing element, wherein the first line splicing element is used for splicing with the external optical fiber a, and the second line splicing element is used for splicing with the external optical fiber B.
Specifically, when the signal transmission quality of the external optical fiber a needs to be tested, the third line butting element is connected with the first line butting element through the rope butting element, and one end of the third line butting element, which is away from the rope butting element, is connected with the testing element 7, so that the signal of the external optical fiber a is transmitted to the testing element 7, and the testing element 7 detects the signal quality transmitted by the external optical fiber a; when the signal transmission quality of the external optical fiber B needs to be tested, the third line butt joint element is connected with the second line butt joint element through the rope butt joint element, and one end, away from the rope butt joint element, of the third line butt joint element is connected with the test element 7, so that the signal of the external optical fiber B is transmitted to the test element 7, and the detection of the signal quality transmitted by the external optical fiber B by the test element 7 is realized.
Optionally, in this embodiment of the present application, the test element 7 includes elements such as a light source, an optical power meter, and an optical time domain reflectometer, where the optical power meter is used to detect attenuation of a signal in the process of transmitting a signal through the external optical fiber, and the optical time domain reflectometer is used to detect a breakpoint of the external optical fiber.
On the basis of any of the above embodiments, in an embodiment of the present application, the control element 3 is further configured to start the test element 7 in a test stage, control the test element 7 to detect the signal transmission quality of the external optical fiber, and close the test element 7 in an operation stage, so that the optical fiber docking device can implement both docking of different external optical fibers and detection of the signal transmission quality of the external optical fiber, and the docking of different external optical fibers and the detection of the signal transmission quality of the external optical fiber are not affected by each other, that is, the test stage and the operation stage are not affected by each other.
It should be noted that, in the embodiment of the present application, the control element 3 includes at least one interface, in one embodiment of the present application, the control element 3 may share one interface when electrically connected to the optical fiber docking device 2 and the test element 7, and in another embodiment of the present application, the control element 3 may not share one interface when electrically connected to the optical fiber docking device 2 and the test element 7, which is not limited in the present application, as the case may be.
Similarly, in the embodiment of the present application, the test element 7 includes at least one interface, in one embodiment of the present application, the test element 7 may share one interface when electrically connected to the optical fiber docking device 2 and the control element 3, and in another embodiment of the present application, the test element 7 may not share one interface when electrically connected to the optical fiber docking device 2 and the control element 3, which is not limited in the present application, as the case may be.
It should be noted that if the control unit 3 and the test unit 7 are implemented by one control device, the control device needs to be repaired or replaced whenever any one of the units is damaged, which results in high repair time and cost. Based on this, on the basis of any of the above embodiments, in an embodiment of the present application, the control element 3 and the test element 7 are independently arranged, so that when the control element 3 or the test element 7 fails, only the failed element can be repaired, thereby saving the repair time and reducing the repair cost.
On the basis of any of the above embodiments, in an embodiment of the present application, as shown in fig. 4, if the optical fiber docking apparatus includes the control element 3, the fiber distribution element 4, and the test element 7, the optical fiber docking apparatus includes a first accommodating space, a second accommodating space, and a third accommodating space, where the first accommodating space and the second accommodating space are arranged along a first direction X, the first accommodating space and the second accommodating space are arranged as a whole along a second direction Y, and the first direction X is perpendicular to the second direction Y;
wherein the first receiving space is used for placing the control element 3, the second receiving space is used for placing the test element 7, and the third receiving space is used for placing the fiber distribution element 4.
It should be noted that, in this application, the area occupied by the fiber distribution element 4 is large, when the control element 3, the test element 7 and the fiber distribution element 4 are arranged in the above manner, the control element 3, the test element 7 and the fiber distribution element 4 are compact in layout, so that the size of the optical fiber docking device can be reduced on the basis of improving the integration level of the optical fiber docking device.
On the basis of any of the above embodiments, in an embodiment of the present application, the control unit 3 has a power switch for controlling the operating state of the fiber docking device under external triggering
On the basis of the above embodiments, in one embodiment of the present application, the operating state of the fiber docking device includes at least two of an operating state, a testing state and a shutdown state.
Optionally, in an embodiment of the present application, the control element 3 has a plurality of power switches, so that the different operating states can be switched by triggering different power switches. In the present application, a plurality means 2 or more.
Specifically, in an embodiment of the present application, as shown in fig. 8, the control element 3 has two power switches, namely a first power switch I and a second power switch II, in the present application, the first power switch I is used for controlling the optical fiber docking equipment to be in a running state when being opened under the external trigger, the second power switch II is used for controlling the optical fiber docking equipment to be in a testing state when being opened under the external trigger, and if the first power switch I and the second power switch II are simultaneously turned off, the optical fiber docking equipment is in a turned-off state.
In another embodiment of the present application, the control element 3 includes a power switch and a control switch, specifically, the control element includes a third power switch and a control switch, where the third power switch is used to activate the control element 3, the control switch is used to control the optical fiber docking device to switch between the test state and the operating state, specifically, when the third power switch is turned on, the control element 3 is powered on and activated, when the user triggers the control switch to generate a first trigger signal, the control element 3 controls the optical fiber docking device to enter the test state based on the first trigger signal and detects the signal transmission quality of the external optical fiber, and when the user triggers the control switch to generate a second trigger signal, the control element 3 controls the optical fiber docking device to enter the operating state based on the second trigger signal, and the butt joint of different external optical fibers is realized.
On the basis of any of the above embodiments, in an embodiment of the present application, as shown in fig. 8, the control element 3 further has a display element interface 9 for connecting a display element to display preset information through the display element, where in an embodiment of the present application, the preset information includes a line docking state in the optical fiber docking element when the optical fiber docking device is running, so that a worker can intuitively know the line docking state in the optical fiber docking device; in another embodiment of the present application, the preset information includes a detection result of the test element 7 when the optical fiber docking device is running, so that a worker can intuitively know the signal transmission quality of the external optical fiber according to the detection result of the test element 7; in other embodiments of the present application, the preset information includes a line docking state in the optical fiber docking device and a detection result of the test element 7 when the optical fiber docking device is running, so that a worker can intuitively know the line docking state in the optical fiber docking device and the signal transmission quality of the external optical fiber.
It should be noted that, in an embodiment of the present application, the control element 3 further includes a plurality of indicator lights, specifically, the control element includes a first indicator light 10, a second indicator light 11, a third indicator light 12, and a fourth indicator light 13, where the first indicator light 10 is used to indicate whether the control element 3 is in communication with an external server, the second indicator light 11 is used to indicate whether the testing element 7 is detecting the signal transmission quality of the external optical fiber or whether the internal component of the optical fiber docking apparatus, such as the manipulator and/or the line docking element, is moving, the third indicator light 12 is used to indicate whether the manipulator clamps the line docking element, and the fourth indicator light 13 is used to indicate whether the optical fiber docking apparatus is abnormal.
Specifically, in the embodiment of the present application, when the first indicator light 10 flashes, it indicates that the control element 3 is communicating with the external server, and when the first indicator light 10 is not turned on, it indicates that the control element 3 is not communicating with the external server; when the second indicator light 11 flashes, it indicates that the test element 7 detects the signal transmission quality of the external optical fiber or that the internal components of the optical fiber docking device, such as the manipulator and/or the line docking element, are moving, and when the second indicator light 11 is not lit, it indicates that the test element 7 does not detect the signal transmission quality of the external optical fiber and the internal components of the optical fiber docking device, such as the manipulator and/or the line docking element, are not moving, that is, the optical fiber docking equipment is in a standby state; when the third indicator light 12 flashes, it indicates that the manipulator clamps the line docking element, that is, the manipulator and the line docking element are in a clamping state, and when the third indicator light 12 is not lit, it indicates that the manipulator does not clamp the line docking element, that is, the manipulator and the line docking element are in a separation state; when the fourth indicator light 13 is not on, it indicates that the optical fiber docking equipment is working normally and is not abnormal, and when the fourth indicator light 13 is on, it indicates that the optical fiber docking equipment is abnormal, so as to prompt a user.
In summary, the optical fiber docking device provided in the embodiment of the present application includes a housing 1, an optical fiber docking device 2 located in the housing 1, and a control element 3 located in the housing 1, wherein, the optical fiber docking device 2 comprises an optical fiber docking element, a plurality of line docking elements and a plurality of rope docking elements, therefore, the optical fiber docking element and the control element 3 are packaged in the same shell 1 to improve the integration level of the optical fiber docking equipment, thereby two independent devices are not needed to be carried, the optical fiber butt joint equipment in the application is convenient to transport, and in addition, when the optical fiber docking equipment is used specifically, only the power switch of the optical fiber docking equipment is needed to be turned on, without the need to re-connect the fibre docking element with the control element 3 each time it is used, so that the fibre docking device of the present application is easy to use.
All parts in the specification are described in a parallel and progressive mode, each part is mainly described to be different from other parts, and the same and similar parts among all parts can be referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An optical fiber docking device, comprising:
a housing;
the optical fiber docking device is positioned in the shell and comprises an optical fiber docking element, a plurality of line docking elements and a plurality of rope docking elements, wherein the line docking elements are used for docking with external optical fibers, and the rope docking elements are used for docking different line docking elements through the optical fiber docking elements;
and the control element is positioned in the shell and used for controlling the rope path butting element to realize butting of different line butting elements.
2. The fiber optic docking device of claim 1, further comprising:
and the fiber distribution element is positioned in the shell and used for fixing the external optical fiber to realize the butt joint of the external optical fiber and the line butt joint element.
3. A fiber optic docking device according to claim 2, wherein the fiber distribution element is docked with the plurality of line docking elements by a set of connection lines, the set of connection lines including a first set of connection lines that dock the external optical fibers with the line docking elements.
4. The fiber optic docking device of claim 2, wherein the connection block further comprises: a second set of connection lines for docking with another fiber docking device.
5. The fiber optic docking device of any of claims 1-4, further comprising:
a test element located within the housing for detecting a signal transmission quality of the external optical fiber.
6. The fiber docking apparatus of claim 5, wherein the control element is further configured to activate the test element during a test phase, control the test element to detect the signal transmission quality of the external fiber, and deactivate the test element during an operation phase.
7. The fiber docking device of claim 5, wherein if the fiber docking device comprises a control element, a fiber distribution element and a test element, the fiber docking device comprises a first accommodating space, a second accommodating space and a third accommodating space, wherein the first accommodating space and the second accommodating space are arranged along a first direction, the whole of the first accommodating space and the second accommodating space is arranged along a second direction with the third accommodating space, and the first direction and the second direction are perpendicular;
the first accommodating space is used for placing the control element, the second accommodating space is used for placing the test element, and the third accommodating space is used for placing the fiber distribution element.
8. The fiber optic docking device of claim 5, wherein the control element has a power switch for controlling an operating state of the fiber optic docking device under external triggering.
9. The fiber optic docking device of claim 8, wherein the operational state of the fiber optic docking device comprises at least two of a run state, a test state, and a shut down state.
10. The fiber docking apparatus of claim 5, wherein the control module further comprises a display element interface for connecting a display element for displaying predetermined information through the display element.
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| CN202010652166.7A CN111679377A (en) | 2020-07-08 | 2020-07-08 | Optical fiber butt joint equipment |
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| CN202010652166.7A CN111679377A (en) | 2020-07-08 | 2020-07-08 | Optical fiber butt joint equipment |
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| CN106772823A (en) * | 2016-12-29 | 2017-05-31 | 国网浙江省电力公司宁波供电公司 | A kind of fiber core docks matrix structure |
| CN107844085A (en) * | 2017-12-15 | 2018-03-27 | 西安航天动力测控技术研究所 | Digital safety mechanism status conversion equipment |
| CN110266377A (en) * | 2019-06-20 | 2019-09-20 | 国网辽宁省电力有限公司电力科学研究院 | Optical fiber remote detection and scheduling system in a kind of fiber optic network |
| CN110361816A (en) * | 2019-06-27 | 2019-10-22 | 李辉 | A kind of optical-cable communication connector |
| CN210720663U (en) * | 2019-08-27 | 2020-06-09 | 北京安达维尔机械维修技术有限公司 | Test equipment for detecting performance of windshield wiper motor of airplane |
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Application publication date: 20200918 |