CN112671459A - Underground optical cable real-time positioning device based on narrow-band Internet of things - Google Patents
Underground optical cable real-time positioning device based on narrow-band Internet of things Download PDFInfo
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- CN112671459A CN112671459A CN202011404009.0A CN202011404009A CN112671459A CN 112671459 A CN112671459 A CN 112671459A CN 202011404009 A CN202011404009 A CN 202011404009A CN 112671459 A CN112671459 A CN 112671459A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 73
- 238000004891 communication Methods 0.000 claims abstract description 24
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- 238000005538 encapsulation Methods 0.000 claims 1
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- 238000005265 energy consumption Methods 0.000 description 6
- 230000002035 prolonged effect Effects 0.000 description 6
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- 230000001413 cellular effect Effects 0.000 description 3
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Abstract
The invention provides an underground optical cable real-time positioning device based on a narrow-band Internet of things, and belongs to the field of communication data transmission. The real-time positioning device comprises an MCU (microprogrammed control Unit) positioned in an optical cable circuit and a box body used for packaging the MCU and part of optical cables, wherein the MCU comprises a narrow-band Internet of things communication module used for being coupled with a remote control terminal and a fault positioning system used for positioning the fault position of the optical cable in real time, the fault positioning system is coupled with the narrow-band Internet of things communication module so as to realize information interaction between the narrow-band Internet of things communication module and the remote control terminal, and the box body is a sealed box body.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to an underground optical cable real-time positioning device based on a narrow-band Internet of things, and belongs to the field of communication data transmission.
[ background of the invention ]
With the continuous development of economic construction and urban construction, communication network construction and reconstruction tasks are increasingly heavy. The continuous improvement of urban distribution network optical cable transformation enables domestic large and medium-sized cities to have increasingly large underground communication optical cable networks, and optical communication networks are the most important communication networks in the current power industry and bear the construction of high-speed and long-distance backbone communication. With the continuous expansion of the optical network scale, the transmission structure of the network becomes more and more complex, and the maintenance of the optical cable and the monitoring of the optical cable state become more and more important and more complex.
Generally, in order to determine the fault occurrence position in the optical cable quickly, a fault location system needs to be provided, for example, a fault location device based on a power grid GIS disclosed in chinese utility model patent CN209342918U, including the fault location system, the fault occurrence position in the optical cable can be determined quickly through the fault location system, however, the energy consumption is large when the information interaction between the fault location system and the remote control terminal, and the standby time of the fault location system is affected.
[ summary of the invention ]
The invention aims to provide an underground optical cable real-time positioning device based on a narrow-band Internet of things, so that the energy consumption during information interaction between a fault positioning system and a remote control terminal can be reduced.
In order to solve the technical problems, the underground optical cable real-time positioning device based on the narrow-band Internet of things comprises an MCU (microprogrammed control unit) positioned in an optical cable circuit and a box body used for packaging the MCU and part of optical cables, wherein the MCU comprises a narrow-band Internet of things communication module used for being coupled with a remote control terminal and a fault positioning system used for positioning the fault position of the optical cables in real time, the fault positioning system is coupled with the narrow-band Internet of things communication module so as to realize information interaction between the narrow-band Internet of things communication module and the remote control terminal, and the box body is a sealed box body.
Preferably, the box body comprises a bottom box and an upper cover, wherein a positioning bulge is arranged on the front surface of one of the bottom box and the upper cover, and a positioning groove matched with the positioning bulge is arranged on the front surface of the other one of the bottom box and the upper cover.
Preferably, an elastic sealing element is arranged in the positioning groove, and when the bottom box is connected with the upper cover, the positioning bulge presses the elastic sealing element.
Preferably, a clamping groove is formed in the bottom box, an elastic buckle is arranged on the upper cover, and the upper cover is clamped with the clamping groove through the elastic buckle so that the positioning protrusion presses the sealing element.
Preferably, the two sides of the bottom box are both provided with first shells, the two sides of the upper cover are both provided with second shells, the first shells and the second shells are both semicircular, the first shells and the second shells are matched to form a circular sleeve, and the inner surface of the circular sleeve is in interference fit with the outer surface of the optical cable.
Preferably, a protrusion is arranged on the front surface of one of the first shell and the second shell, a groove matched with the protrusion is arranged on the front surface of the other one of the first shell and the second shell, an elastic part is arranged in the groove, and when the bottom box is connected with the upper cover, the protrusion presses the elastic part to enable the inner surface of the circular sleeve to be in interference fit with the outer surface of the optical cable.
Preferably, the box body further comprises a positioning ring and a locking ring, the positioning ring is sleeved outside the circular sleeve and comprises a clamping strip in contact with the outer surface of the circular sleeve, a first inclined surface is arranged on the clamping strip, a second inclined surface is oppositely arranged on the locking ring, the included angle between the second inclined surface and the horizontal plane is smaller than that between the first inclined surface and the horizontal plane, and when the positioning ring moves towards the locking ring, the second inclined surface exerts pressure on the first inclined surface to enable the clamping strip to tightly press the circular sleeve.
Preferably, the inner surfaces of the first shell and the second shell are provided with arc-shaped grooves, the arc-shaped grooves of the first shell and the second shell jointly form an annular groove coaxial with the circular sleeve, a sealing ring is arranged in the annular groove, and the clamping strip is tightly pressed on the circular sleeve and then drives the sealing ring to tightly press the optical cable.
The invention has the beneficial effects that:
firstly, the narrow-band Internet of things communication module is used for constructing the narrow-band Internet of things to realize signal interaction, information interaction between the fault positioning system and the remote control terminal can be realized through the narrow-band Internet of things communication module, secondly, because the narrow-band Internet of things has the advantages of low energy consumption and fast transmission, the energy consumption during the information interaction between the fault positioning system and the remote control terminal can be reduced, the transmission speed of the information interaction is increased, meanwhile, the underground optical cable is embedded at the ground bottom, so that the maintenance and the replacement are inconvenient, when the narrow-band Internet of things transmission is adopted, the power consumption can be reduced, the standby time of the MCU is prolonged, the frequency of power supply can be reduced, the service life of the MCU can be prolonged, the replacement time of the MCU can be prolonged, the service life of the real-time positioning device of the underground optical cable, the maintenance and the replacement of the working personnel are more convenient.
In addition, MCU and partial optical cable are sealed through the sealing box body, the damage of the MCU and the connection part of the MCU and the optical cable caused by environment factors such as ground bottom humidity and the like can be prevented, the service life of the real-time positioning device of the underground optical cable is influenced, the information interaction and the influence of the ground bottom environment on the MCU can be fully reduced through the narrow-band Internet of things and the sealing box body, and therefore the real-time positioning device of the underground optical cable is guaranteed to have a good service life.
These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.
[ description of the drawings ]
The invention is described in further detail below with reference to the attached drawing figures, wherein:
FIG. 1 is a schematic view of a device for real-time positioning of underground fiber optic cables according to the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at C;
FIG. 3 is a schematic view of the upper cover of the present invention;
FIG. 4 is an enlarged schematic view of FIG. 3 at A;
FIG. 5 is a schematic view of a back box according to the present invention;
FIG. 6 is an enlarged schematic view of FIG. 5 at B;
FIG. 7 is a schematic view of a retaining ring of the present invention;
figure 8 is a schematic view of a locking ring according to the present invention;
figure 9 is a cross-sectional view of a locking ring in the present invention;
FIG. 10 is a schematic view of a positioning device of the present invention in connection with a fiber optic cable.
Reference numerals:
the sealing structure comprises a bottom box 1, an upper cover 2, an elastic buckle 3, a clamping groove 4, a fixing sheet 5, a first shell 6, a second shell 7, a positioning protrusion 8, a positioning groove 9, an elastic sealing element 10, a sealing ring 11, a positioning ring 12, a locking ring 13, a clamping strip 14, a first inclined surface 15, a first mounting plate 16, a MCU17, a second mounting plate 18 and a second inclined surface 19.
[ detailed description ] embodiments
The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
In the following description, the terms such as "inner", "outer", "upper", "lower", "left", "right", etc., which indicate orientations or positional relationships, are used to indicate orientations or positional relationships based on the drawings, and are only used for convenience in describing embodiments and for simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 to 10, the preferred structure of the underground optical cable real-time positioning device based on the narrow-band internet of things of the present embodiment includes an MCU17 located in an optical cable line and a box body used for encapsulating an MCU17 and a part of optical cables, the MCU17 includes a narrow-band internet of things communication module for coupling with a remote control terminal and a fault positioning system for positioning a fault position of the optical cable in real time, the fault positioning system is coupled with the narrow-band internet of things communication module to realize information interaction between the narrow-band internet of things communication module and the remote control terminal, and the box body is a sealed box body.
The invention has the beneficial effects that:
firstly, the narrow-band internet of things communication module is used for constructing the narrow-band internet of things to realize signal interaction, information interaction between the fault positioning system and the remote control terminal can be realized through the narrow-band internet of things communication module, secondly, because the narrow-band internet of things has the advantages of low energy consumption and fast transmission, the energy consumption during the information interaction between the fault positioning system and the remote control terminal can be reduced, the transmission speed of the information interaction is increased, meanwhile, the underground optical cable is embedded at the ground bottom, so that the maintenance and the replacement are inconvenient, when the narrow-band internet of things transmission is adopted, the power consumption can be reduced, the standby time of the MCU17 is prolonged, the frequency of power supply can be reduced, the service life of the MCU17 can be prolonged, the replacement time of the MCU17 is prolonged, the service life of the real-time positioning device of the underground optical cable can, the maintenance and the replacement of the working personnel are more convenient.
In addition, MCU17 and partial optical cable are sealed through the seal box body, can prevent that the connecting position of MCU17 and MCU17 and optical cable from taking place to damage because environmental factors such as ground bottom humidity from causing, influence the life of real-time positioner of underground optical cable, can fully reduce information interaction and the influence of ground bottom environment to MCU17 through narrowband thing networking and seal box body to guarantee that real-time positioner of underground optical cable has good life.
The narrowband internet of things (NB-IoT) becomes an important branch of the internet of everything. The NB-IoT is constructed in a cellular network, only consumes about 180KHz of bandwidth, and can be directly deployed in a GSM network, a UMTS network or an LTE network so as to reduce the deployment cost and realize smooth upgrading. NB-IoT is an emerging technology in the IoT domain that supports cellular data connectivity for low power devices over wide area networks, also known as Low Power Wide Area Networks (LPWANs). NB-IoT supports efficient connectivity for devices with long standby time and high requirements for network connectivity. It is said that NB-IoT device battery life can be increased to at least 10 years while still providing very comprehensive indoor cellular data connection coverage.
An MCU (micro controller unit), also called a single chip Microcomputer (MCU), or a single chip Microcomputer (MCU) is a chip-level computer formed by appropriately reducing the frequency and specification of a Central Processing Unit (CPU), and integrating peripheral interfaces such as a memory (memory), a counter (Timer), a USB, an a/D converter, a UART, a PLC, a DMA, and even an LCD driving circuit on a single chip, so as to perform different combination control for different applications.
Wherein, narrowband thing networking communication module and fault location system are the hardware that can obtain among the prior art, and fault location system adopts like the utility model patent CN209342918U discloses a based on fault location system among electric wire netting GIS optical cable fault location device, and it includes stable light source module OS, filtering module TF, wave combination module WDM, optical power module OPM, optical path test OTDR and optical switch module OSW, light switching protection module.
In order to make the bottom case 1 and the upper cover 2 capable of being sealed, the box body of the present embodiment preferably includes the bottom case 1 and the upper cover 2, the front surface of one of the bottom case 1 and the upper cover 2 is provided with a positioning protrusion 8, the front surface of the other one is provided with a positioning groove 9 matched with the positioning protrusion 8, when the positioning protrusion 8 is engaged with the positioning groove 9, the upper cover 2 and the bottom case 1 can be sealed by the contact of the three surfaces of the positioning protrusion 8 and the inner surface of the positioning groove 9, so as to increase the contact area and improve the sealing effect, and the circumferential edge of the upper cover 2 can be matched with the bottom case 1 by changing the depth of the positioning protrusion 8 inserted into the positioning groove 9, so as to prevent the poor sealing effect caused by the gap between the circumferential edge of the upper cover 2 and the edge of the bottom case 1 due to machining error or abrasion, and the contact of the two longitudinal surfaces of the positioning protrusion 8 and the inner surface of, certain machining errors can be compatible.
In order to further improve the sealing effect, in this embodiment, it is preferable that an elastic sealing member 10 is disposed in the positioning groove 9, and when the bottom case 1 is connected to the upper cover 2, the positioning protrusion 8 presses the elastic sealing member 10, so that the space between the lateral surface of the positioning protrusion 8 and the bottom surface of the positioning groove 9 can be sealed by the elastic sealing member 10, thereby further improving the sealing effect.
In addition, a fixing plate 5 may be provided on the bottom case 1, and the fixing plate 5 may be screwed with an external device so that the positioning device may be mounted to the external device.
In order to make end box 1 can be fixed with upper cover 2, this embodiment is preferred be equipped with block groove 4 on end box 1, be equipped with elastic buckle 3 on the upper cover 2, upper cover 2 passes through elastic buckle 3 with block groove 4 block is so that location arch 8 sticiss elastic sealing element 10, through elastic buckle 3 and block groove 4 block, make end box 1 can be fixed with upper cover 2, can control location arch 8 simultaneously and sticis sealed elastic sealing element 10, improve sealed effect, of course, can also adopt the screw to connect between end box 1 and the upper cover 2, but because the cable is located the underground, the screw rusts easily and ages in the humid air, it is sealed that the time length can influence, and the dismouting is inconvenient, when needs maintenance change, easy because the screw rusts ageing and leads to dismantling difficultly, it is inconvenient to make staff's maintenance change, the mode that adopts buckle and block groove 4 in this embodiment can avoid the screw because problem that external environment factor influences and lead to.
In order to enable the optical cable to be sealed by the box body, in the embodiment, it is preferable that the two sides of the bottom box 1 are both provided with the first shell 6, the two sides of the upper cover 2 are both provided with the second shell 7, the first shell 6 and the second shell 7 are both semicircular and are matched to form a circular sleeve, the inner surface of the circular sleeve is in interference fit with the outer surface of the optical cable, and the optical cable is sleeved in the circular sleeve formed by the first shell 6 and the second shell 7, so that the optical cable can be sealed in a manner of contacting the surface of the circular sleeve and the optical cable, and the sealing effect of the positioning device is improved.
In order to enable the first housing 6 and the second housing 7 to be sealed, in this embodiment, it is preferable that a protrusion is disposed on a front surface of one of the first housing 6 and the second housing 7, a groove matched with the protrusion is disposed on a front surface of the other one of the first housing 6 and the second housing 7, an elastic member is disposed in the groove, and when the bottom case 1 is connected to the upper cover 2, the protrusion presses the elastic member to enable the inner surface of the circular sleeve to be in interference fit with the outer surface of the optical cable, a sealing effect can be improved by the engagement of the protrusion and the groove, a positioning effect can be further improved by pressing the elastic member, an interference between the inner surface of the circular sleeve and the outer surface of the optical cable can be controlled, and the elastic member and the elastic sealing member 10 can be of.
In order to further improve the sealing effect, in this embodiment, it is preferable that the box body further includes a positioning ring 12 and a locking ring 13, the positioning ring 12 includes a clamping strip 14 contacting with the outer surface of the circular sleeve, the clamping strip 14 is provided with a first inclined surface 15, the locking ring 13 is provided with a second inclined surface 19, an included angle between the second inclined surface 19 and the horizontal plane is smaller than an included angle between the first inclined surface 15 and the horizontal plane, when the positioning ring 12 moves towards the locking ring 13, the second inclined surface 19 applies pressure to the first inclined surface 15 to enable the clamping strip 14 to press the circular sleeve, the first shell 6 and the second shell 7 can be preliminarily limited by the annular inner surface of the positioning ring 12, the first shell 6 and the second shell 7 are prevented from being separated, the clamping strip 14 is pressed by the locking ring 13 in a sliding manner, the clamping strip 14 moves to shrink towards the axis, so that the distance between first casing 6 and the second casing 7 is more nearly, make the arch can sticis sealing member in the recess realizes sealedly, thereby further improve sealed effect, through inclined plane cooperation mode, can fully guarantee the arch can compress tightly sealing member and realize sealedly, and can control bellied allowance that compresses tightly, make can guarantee that the sealing member has under the condition of good fatigue strength, the arch can compress tightly sealing member and seal, wherein, be equipped with the groove that is used for the block of card strip 14 block on the circular sleeve pipe, when the card strip 14 is located the inslot, holding ring 12 can realize circumferential location through the spacing in groove, the locking ring of card strip 14 is pressed in the sliding of 13 of also being convenient for.
In order to further seal the optical cable, it is preferable in this embodiment that the inner surfaces of the first casing 6 and the second casing 7 are both provided with arc-shaped grooves, and the arc-shaped grooves of the first casing and the second casing jointly form an annular groove coaxial with the circular sleeve, a sealing ring 11 is arranged in the annular groove, the clamping strip 14 tightly presses the circular sleeve and drives the sealing ring 11 tightly pressing the optical cable, and the sealing effect between the outer surface of the optical cable and the inner surface of the circular sleeve can be further improved by sealing the sealing ring 11.
In order to connect the first housing 6 and the second housing 7, in this embodiment, it is preferable that the positioning ring 12 is provided with a first mounting plate 16, the locking ring 13 is provided with a second mounting plate 18, and the first mounting plate 16 and the second mounting plate 18 are both provided with through holes for bolt connection, and are fixed by bolts, so that the first housing 6 and the second housing 7 can be connected, and at the same time, the distance between the first housing 6 and the second housing 7 can be adjusted by bolts, thereby increasing the flexibility of mounting the first housing 6 and the second housing 7.
In order to achieve sealing in the circumferential direction of the circular sleeve, in this embodiment, it is preferable that the plurality of clamping strips 14 are symmetrically distributed on two sides of the positioning ring 12, and the plurality of clamping strips 14 are contracted along the axis of the optical cable, so that circumferential pressure between the first casing 6 and the second casing 7 can be increased, and sealing between the first casing 6 and the second casing 7 and sealing between the optical cable and the circular sleeve can be better.
While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the invention is not limited thereto, and may be embodied in many different forms without departing from the spirit and scope of the invention as set forth in the following claims. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.
Claims (10)
1. The utility model provides an underground optical cable real-time positioning device based on narrowband thing networking which characterized in that: including the MCU that is arranged in the optical cable circuit and the box body that is used for encapsulation MCU and partial optical cable, MCU is including the narrowband thing networking communication module that is used for with remote control terminal coupling and the fault location system who is used for real-time location optical cable fault location, fault location system with narrowband thing networking communication module coupling is in order to pass through realize information interaction between narrowband thing networking communication module and the remote control terminal, the box body is sealed box body.
2. The real-time underground optical cable positioning device based on the narrowband internet of things as claimed in claim 1, wherein: the box body comprises a bottom box and an upper cover, wherein a positioning bulge is arranged on the front surface of one of the bottom box and the upper cover, and a positioning groove matched with the positioning bulge is arranged on the front surface of the other one of the bottom box and the upper cover.
3. The real-time underground optical cable positioning device based on the narrow-band Internet of things as claimed in claim 2, wherein: an elastic sealing element is arranged in the positioning groove, and when the bottom box is connected with the upper cover, the positioning bulge presses the elastic sealing element.
4. The real-time underground optical cable positioning device based on the narrow-band Internet of things as claimed in claim 3, wherein: the bottom box is provided with a clamping groove, the upper cover is provided with an elastic buckle, and the upper cover is clamped with the clamping groove through the elastic buckle so that the positioning bulge tightly presses the elastic sealing element.
5. The real-time underground optical cable positioning device based on the narrow-band Internet of things as claimed in claim 2, wherein: the optical cable box comprises a bottom box body, an upper cover and a lower box body, wherein the bottom box body is provided with an optical cable, the optical cable box body is provided with an.
6. The real-time underground optical cable positioning device based on the narrow-band Internet of things as claimed in claim 5, wherein: the front surface of one of the first shell and the second shell is provided with a protrusion, the front surface of the other one of the first shell and the second shell is provided with a groove matched with the protrusion, an elastic part is arranged in the groove, and when the bottom box is connected with the upper cover, the protrusion presses the elastic part to enable the inner surface of the circular sleeve to be in interference fit with the outer surface of the optical cable.
7. The real-time underground optical cable positioning device based on the narrow-band Internet of things as claimed in claim 5, wherein: the box body further comprises a positioning ring and a locking ring, the positioning ring is sleeved outside the circular sleeve and comprises a clamping strip in contact with the outer surface of the circular sleeve, a first inclined surface is arranged on the clamping strip, a second inclined surface is oppositely arranged on the locking ring, the included angle between the second inclined surface and the horizontal plane is smaller than that between the first inclined surface and the horizontal plane, and when the positioning ring moves towards the locking ring, the second inclined surface applies pressure to the first inclined surface to enable the clamping strip to tightly press the circular sleeve.
8. The real-time underground optical cable positioning device based on the narrowband internet of things as claimed in claim 7, wherein: all be equipped with the arc recess on the internal surface of first casing and second casing, and the arc recess of the two form jointly with the coaxial annular of circular sleeve pipe, be equipped with the sealing ring in the annular, the card strip sticiss drive during the circular sleeve pipe the sealing ring sticiss the optical cable.
9. The real-time underground optical cable positioning device based on the narrowband internet of things as claimed in claim 7, wherein: the positioning ring is provided with a first mounting plate, the locking ring is provided with a second mounting plate, and the first mounting plate and the second mounting plate are both provided with through holes for connecting bolts.
10. The real-time underground optical cable positioning device based on the narrowband internet of things as claimed in claim 7, wherein: the clamping strips are multiple and are symmetrically distributed on two sides of the positioning ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011404009.0A CN112671459A (en) | 2020-12-03 | 2020-12-03 | Underground optical cable real-time positioning device based on narrow-band Internet of things |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011404009.0A CN112671459A (en) | 2020-12-03 | 2020-12-03 | Underground optical cable real-time positioning device based on narrow-band Internet of things |
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| CN112671459A true CN112671459A (en) | 2021-04-16 |
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| CN202011404009.0A Pending CN112671459A (en) | 2020-12-03 | 2020-12-03 | Underground optical cable real-time positioning device based on narrow-band Internet of things |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140143818A1 (en) * | 2011-07-01 | 2014-05-22 | Certusview Technologies, Llc | Cable communication systems and methods employing 256-qam upstream channels and having increased upstream capacity for supporting voice and/or data services |
| CN208400299U (en) * | 2018-06-20 | 2019-01-18 | 上海长跃通信技术有限公司 | A kind of optical cable fiber-dividing box monitoring device based on NB-IoT |
| CN111130633A (en) * | 2019-12-07 | 2020-05-08 | 西安瑞宝电子科技有限公司 | NB-IoT technology-based system and method for positioning optical cable fault in power channel |
-
2020
- 2020-12-03 CN CN202011404009.0A patent/CN112671459A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140143818A1 (en) * | 2011-07-01 | 2014-05-22 | Certusview Technologies, Llc | Cable communication systems and methods employing 256-qam upstream channels and having increased upstream capacity for supporting voice and/or data services |
| CN208400299U (en) * | 2018-06-20 | 2019-01-18 | 上海长跃通信技术有限公司 | A kind of optical cable fiber-dividing box monitoring device based on NB-IoT |
| CN111130633A (en) * | 2019-12-07 | 2020-05-08 | 西安瑞宝电子科技有限公司 | NB-IoT technology-based system and method for positioning optical cable fault in power channel |
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Application publication date: 20210416 |