CN109039440B - Efficient OTDR test system and method - Google Patents
Efficient OTDR test system and method Download PDFInfo
- Publication number
- CN109039440B CN109039440B CN201811074838.XA CN201811074838A CN109039440B CN 109039440 B CN109039440 B CN 109039440B CN 201811074838 A CN201811074838 A CN 201811074838A CN 109039440 B CN109039440 B CN 109039440B
- Authority
- CN
- China
- Prior art keywords
- optical switch
- test
- otdr
- optical
- array
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- H04B10/071—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using a reflected signal, e.g. using optical time domain reflectometers [OTDR]
Abstract
The invention discloses a high-efficiency OTDR test system, which comprises an OTDR test unit array, a front-stage optical switch array and a rear-stage optical switch array, wherein each OTDR test unit is connected with a front-stage optical switch, the rear-stage optical switch array is connected with the rear-stage optical switch array through an optical switch cross distribution frame, the OTDR test unit is communicated with a computer server, the computer server is also connected with an optical switch driving controller, and the computer server is also connected with a production management system through a local area network; the rear-stage optical switch array is connected to the optical fiber coupling concentrator and is connected with the multi-core buffer transmission optical cable through the optical fiber coupling concentrator, the multi-core buffer transmission optical cable is respectively connected with the coupling device on the test station through the optical fiber coupling concentrator at the test end, and the test station is further provided with a control panel. The invention also provides a high-efficiency OTDR test method. The invention realizes centralized management and distributed measurement, has low maintenance requirement, high equipment utilization rate, simple operation process and obviously improved efficiency.
Description
Technical Field
The invention relates to a system and a method for testing an optical fiber cable, in particular to a system and a method for testing an efficient OTDR (optical time domain reflectometer), belonging to the technical field of production testing of optical fiber cables.
Background
In each link of optical fiber and optical cable production, the technical parameters of optical fiber and optical cable length, insertion return loss, link loss, attenuation coefficient, attenuation distribution and the like need to be tested and measured for many times by means of OTDR equipment, and the OTDR is essential key instrument equipment in the link of optical fiber and optical cable production and test.
Compared with engineering instruments and meters, the OTDR equipment for the production test of the optical fiber cable is high in required precision, strong in stability, good in repeatability and environmental adaptability, so that the existing equipment mainly adopts desktop equipment, and is large in size and heavy; since the OTDR equipment for the production test of the optical fiber and the optical cable is required to be used in each link of the production of the optical fiber and the optical cable and relates to the test and measurement of a plurality of technical parameters, the OTDR equipment for the production test of the optical fiber and the optical cable is generally distributed in each part of a factory, bears different test programs and test items and is managed and maintained by test operators at different posts. In addition, because the optical fiber cable products are various in types, production testing tasks are randomly changed, and the utilization rate of OTDR testing equipment in each plant area and station is extremely unbalanced.
As shown in fig. 1, in the prior art, an OTDR testing system for an optical fiber cable production test generally includes a computer and an OTDR testing device, where an optical fiber to be tested is coupled by a coupling device under the operation of an operator and then enters the OTDR testing device to be tested, a program and related testing parameters are preset in the computer before testing, and after testing, the computer sends testing result information to a production management system through a local area network. As can be seen from fig. 2, in the prior art, during testing, in addition to the testing link, the OTDR device processes the working state, and in other links, including the links of fiber end surface processing, fiber coupling, parameter setting program selection, test judgment data uploading, and the like, the OTDR device is in a waiting state.
Disclosure of Invention
In order to overcome the defects of an OTDR system for production test of optical fiber cables in the prior art, the invention provides a high-efficiency OTDR test system for centralized management and distributed measurement, so that the distributed measurement of equipment centralized management is realized, the maintenance requirement is low, the utilization rate is high, the operation flow is simple, and the measurement efficiency is obviously improved.
The invention is realized in such a way that:
a high-efficiency OTDR test system comprises an OTDR test unit array consisting of a plurality of OTDR test units, a front-stage optical switch array consisting of a plurality of equipment optical switches, and a rear-stage optical switch array consisting of a plurality of station optical switches, wherein each OTDR test unit is connected with one equipment optical switch; the rear-stage optical switch array is also connected to the optical fiber coupling concentrator and is connected with the multi-core buffer transmission optical cable through the optical fiber coupling concentrator, the multi-core buffer transmission optical cable is respectively connected with the coupling device on the test station through the optical fiber coupling concentrator at the test end, the test station is also provided with a control panel, the control panel is controlled by the control command input by an operator on the test station, and the control panel transmits the control command through a local area network.
The further scheme is as follows:
the OTDR test unit array is composed of N OTDR test units, each OTDR test unit can realize an OTDR basic function test flow, and N is an integer which is more than or equal to 3 generally.
The further scheme is as follows:
the front-stage optical switch array comprises N1 × M optical switches, the public end of each optical switch realizes the optical interface coupling of N OTDR test units, and the optical switch branches realize the traversing coupling of M stations;
the rear-stage optical switch array comprises M1 × N optical switches, the common end of each optical switch realizes coupling to the test optical fiber interfaces of M stations, and the optical switch branches realize traversing coupling to N OTDR test units.
The further scheme is as follows:
the optical switch cross distribution frame is used for realizing the optical fiber coupling of a front stage optical switch array and a rear stage optical switch array, and the connection method is that the mth channel of the nth 1 x M type optical switch is connected with the nth channel of the mth 1 x N type optical switch in a matching mode.
The further scheme is as follows:
the computer server is used for realizing the management of the OTDR test unit array and the management of the optical switch driving controller, and is also used for corresponding operation requests issued by the operator control panel through the local area network and returning data.
The further scheme is as follows:
the optical switch driving controller is used for responding to a control instruction of the computer server and controlling the switch closing actions of the front-stage optical switch array and the rear-stage optical switch array;
the core number of the multi-core buffer transmission optical fiber is M, and the optical transmission link for optical fiber coupling between the rear-stage optical switch array and the test station is provided and is connected in a one-to-one mode;
the coupling device is used for coupling the optical fiber cable to be tested with the optical link at the end of the transmission optical cable, and is generally manually completed by an operator;
the operator control panel is used for realizing man-machine interaction with an operator, issuing an operator operation instruction, receiving a test result fed back by a computer server transmitted by a display local area network, and generally realized by matching a computer with operation software.
In the invention, N represents the number of OTDR test units, M represents the number of stations in a test workshop, N, M can traverse any value theoretically, and the optical switch cost and the equipment utilization rate are considered, wherein N is the constraint on N is less than or equal to 32, and M is less than or equal to 2N.
In the invention, the computer server is used as a central controller to uniformly control and schedule, so that the uniform management and maintenance of the OTDR equipment are realized, and the centralized management and distribution measurement is realized; meanwhile, the testing process is optimized, the idle time of the equipment is shortened in a time division multiplexing mode, and the one-to-one service of the equipment personnel is changed to the multi-to-multi interactive service of the current equipment personnel. The extension buffer optical fiber of the optical fiber cable in the OTDR test process is converted into a transmission buffer optical cable, which cannot be ignored and is also a key factor of the invention aiming at OTDR equipment and not covering other test and measurement equipment. In the prior art, for example, in the conventional testing method shown in fig. 1, considering the problem of the initial reflection peak blind area of the OTDR device itself (the blind area is an invalid testing range, which may reach hundreds of meters), and the coupling convenience (the production line has a large testing workload, generally does not need to couple with a connector, but a V-shaped groove, and requires to cut the cross section again for each coupling, which results in a loss of jumper length), the number of the extended buffer fibers is generally increased or decreased by about 2km between the device and the fiber to be tested. In this application, the extended buffered optical fiber, which must be present, is evolved into a transmission buffered optical cable. I.e. an optical fiber which is originally a disc of 2km, now is an optical cable (or a part of the optical cable + a part of the optical fiber), which brings possibility for equipment concentration and distribution measurement.
The invention also provides an efficient OTDR test method, which is used for the computer server to carry out reasonable scheduling and optical link calculation according to different types of test requests from each control panel and by combining the idle condition of the managed OTDR test unit array, and giving control driving instructions of two groups of optical switch arrays to realize optical link switching; and analyzing and forwarding the OTDR test parameters in the test request, and finishing OTDR test result judgment and data return.
Specifically, the efficient OTDR testing method of the present invention includes the following steps:
receiving an operation instruction of an operator control panel, and forming an operation request buffer to enter an OTDR test request queue;
step two, calculating idle OTDR in the OTDR test unit array in real time, and buffering the idle OTDR test unit array;
step three, matching the idle OTDR test unit with the test request optical fiber link according to the sequence of the two queue buffers;
step four, starting corresponding OTDR measurement according to the test parameters required by the test request;
step five, calling a database test judgment standard according to the test items required by the test request, and judging the test result;
and step six, returning the judgment result to the control panel which provides the corresponding test request.
The further scheme is as follows: the computer server sets the priority of different testing ports according to different testing items and testing product batches, and preferentially processes the testing instruction with high weight.
The invention discloses an OTDR system and method which have the advantages of centralized management and distribution measurement, low maintenance requirement, high equipment utilization rate, simple operation process and obviously improved measurement efficiency. Compared with a common OTDR instrument or equipment, the system realizes the centralized management and the distributed measurement of the OTDR equipment, reduces the maintenance condition of the OTDR equipment and the space requirement of a production test station, and improves the equipment utilization rate and the operator efficiency.
Drawings
Fig. 1 is a diagram of an OTDR test system for a conventional optical fiber cable production test.
Fig. 2 shows the equipment status of each link of the conventional OTDR test in the fiber optic cable production.
Fig. 3 is a topological diagram of a frame structure of an efficient OTDR test system according to an embodiment of the present invention.
Fig. 4 is a flowchart of an efficient OTDR testing method according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an OTDR test unit in an embodiment of the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Example 1
As shown in fig. 3, a high-efficiency OTDR test system includes an OTDR test unit array composed of a plurality of OTDR test units, a front-stage optical switch array composed of a plurality of device optical switches, and a rear-stage optical switch array composed of a plurality of station optical switches, where each OTDR test unit is connected to one device optical switch, the front-stage optical switch array is connected to the rear-stage optical switch array through an optical switch cross-distribution frame, the OTDR test units are communicated with a computer server, the computer server is further connected to an optical switch drive controller, the optical switch drive controller is respectively connected to the front-stage optical switch array and the rear-stage optical switch array, and the computer server is further connected to a production management system through a local area network; the rear-stage optical switch array is also connected to the optical fiber coupling concentrator and is connected with the multi-core buffer transmission optical cable through the optical fiber coupling concentrator, the multi-core buffer transmission optical cable is respectively connected with the coupling device on the test station through the optical fiber coupling concentrator at the test end, the test station is also provided with a control panel, the control panel is controlled by the control command input by an operator on the test station, and the control panel transmits the control command through a local area network.
The OTDR test unit array is composed of N OTDR test units, each OTDR test unit can realize an OTDR basic function test flow, and N is an integer generally larger than or equal to 3;
the front-stage optical switch array comprises N1 × M optical switches, the public end of each optical switch realizes the optical interface coupling of N OTDR test units, and the optical switch branches realize the traversing coupling of M stations;
the rear-stage optical switch array comprises M1 × N optical switches, the common end of each optical switch realizes the coupling of the test optical fiber interfaces of M stations, and the optical switch branches realize the traversing coupling of N OTDR test units;
the optical switch cross distribution frame is used for realizing the optical fiber coupling of a front-stage optical switch array and a rear-stage optical switch array, and the connection method is that the mth channel of the nth 1 x M type optical switch is connected with the nth channel of the mth 1 x N type optical switch;
the computer server is used for realizing the management of the OTDR test unit array and the management of the optical switch driving controller and is also used for corresponding operation requests issued by the operator control panel through the local area network and returning data;
the optical switch driving controller is used for responding to a control instruction of the computer server and controlling the switch closing actions of the front-stage optical switch array and the rear-stage optical switch array;
the core number of the multi-core buffer transmission optical fiber is M, and the optical transmission link for optical fiber coupling between the rear-stage optical switch array and the test station is provided and is connected in a one-to-one mode;
the coupling device is used for coupling the optical fiber cable to be tested with the optical link at the end of the transmission optical cable, and is generally manually completed by an operator;
the operator control panel is used for realizing man-machine interaction with an operator, issuing an operator operation instruction, receiving a test result fed back by a computer server transmitted by a display local area network, and generally realized by matching a computer with operation software.
In the invention, N represents the number of OTDR test units, M represents the number of stations in a test workshop, N, M can traverse any value theoretically, and the optical switch cost and the equipment utilization rate are considered, wherein N is the constraint on N is less than or equal to 32, and M is less than or equal to 2N.
As an optimized embodiment of the present invention, as shown in fig. 5, the OTDR test unit array of the present invention is composed of a plurality of light source modules with different wavelengths, a detector module, a data acquisition module, and a multi-channel optical switch, and the subdivision is implemented again on the basis of the OTDR test unit, and the computer server can directly operate and manage the light source modules with different wavelengths, the detector module, and the data acquisition module through the multi-channel optical switch according to the test requirements, so as to complete the response of the test request instructions with different requirements;
in the actual operation process, the control panel can realize technical parameter test and measurement procedures including but not limited to the length, the insertion return loss, the link loss, the attenuation coefficient, the attenuation distribution and the like of the optical fiber cable through preprogramming, and an operator only needs to select test items to issue instructions;
according to different workshop conditions and different production conditions, the control panel can be realized through the embedded board card, has display screen output, operation buttons and touch screen instruction input, can be accessed to a local area network and realizes information interaction with a production management system; the control panel can also be realized by matching an embedded processor with simple control buttons and indicator lamps, the interconnection and intercommunication, test flow parameter issuing, complex control logic and the like of the local area network production management system are realized by pre-programming the processor, and an operator only needs to finish the reading of simple button operation signals;
as an embodiment of the present invention, the coupling means is an automatic coupling system of the image-based or laser detection type, which are conventional techniques that may be selected in the art.
In the actual operation process, the multi-core buffer transmission optical cable can be one bundle or a plurality of bundles, and the plurality of bundles can be distributed to different requirement test workshops according to different requirements to realize distribution measurement;
as an optimized embodiment of the invention, a plurality of buffer transmission optical cable ports can be distributed on a single test station, a plurality of sets of coupling devices are arranged, and the control panel can issue OTDR test flow requests of the plurality of buffer transmission optical cable ports, thereby improving the efficiency of operators;
as an embodiment of the present invention, the front stage optical switch array, the rear stage optical switch array and the optical switch distribution frame are composed of 1 × 2 type optical switches or other channel number optical switches, and it is only necessary that each test unit can traverse each test station, and each test station can traverse each test unit, and the optical switches may be mechanical type or MEMS type optical switches;
in the actual operation process, a machine room or a data center of the OTDR test unit array is stored, a constant temperature and humidity environment is kept, maintenance and calibration are carried out on each OTDR test unit regularly, and the stability and the test precision of the test unit are improved.
Example 2
As shown in fig. 4, the method for testing an OTDR in high efficiency according to this embodiment includes the following steps:
receiving an operation instruction of an operator control panel, and forming an operation request buffer to enter an OTDR test request queue;
step two, calculating idle OTDR in the OTDR test unit array in real time, and buffering the idle OTDR test unit array;
step three, matching the idle OTDR test unit with the test request optical fiber link according to the sequence of the two queue buffers;
step four, starting corresponding OTDR measurement according to the test parameters required by the test request;
step five, calling a database test judgment standard according to the test items required by the test request, and judging the test result;
step six, the judgment result is transmitted back to the control panel which provides the corresponding test request;
as an optimized embodiment of the invention, the computer server sets the priorities of different test ports aiming at different test items and test product batches, and preferentially processes the test instruction with high weight;
in the actual operation process, aiming at the buffer depth and saturation of an operator OTDR test request queue and an idle OTDR test unit queue, an analysis report is timely given, so that the number of OTDR test units can be increased or decreased as required;
in the test process, the test request comprises product information of the optical fiber and the optical cable to be tested, the product information is butted with a product production database in the test process, test data and a conclusion are uploaded, and a product big database is formed;
aiming at the optical fiber cables which are unqualified in test, the optical fiber cable production system is automatically input and test detailed information is submitted, so that later-period product rechecking, product screening and problem analysis are facilitated.
Claims (4)
1. A high-efficient OTDR test system, characterized by that to include OTDR test unit array composed of multiple OTDR test unit, the front-stage optical switch array composed of multiple apparatus optical switches, the back-stage optical switch array composed of multiple station optical switches, each OTDR test unit couples to an apparatus optical switch, the front-stage optical switch array couples to back-stage optical switch array through the optical switch cross distribution frame, the OTDR test unit communicates with computer server, the computer server still connects the optical switch drive controller, the optical switch drive controller connects with front-stage optical switch array and back-stage optical switch array separately, the computer server still couples to production management system through the local area network; the rear-stage optical switch array is also connected to the optical fiber coupling concentrator and is connected with the multi-core buffer transmission optical cable through the optical fiber coupling concentrator, the multi-core buffer transmission optical cable is respectively connected with the coupling device on the test station through the optical fiber coupling concentrator at the test end, the test station is also provided with a control panel, the control panel is controlled by inputting a control instruction by an operator on the test station, and the control panel transmits the control instruction through a local area network and receives and displays a test result; the computer server is used for realizing the management of the OTDR test unit array and the management of the optical switch driving controller and is also used for corresponding operation requests issued by the operator control panel through the local area network and returning data; the optical switch driving controller is used for responding to a control instruction of the computer server and controlling the switch closing actions of the front-stage optical switch array and the rear-stage optical switch array;
the OTDR test unit array consists of N OTDR test units, and each OTDR test unit can realize an OTDR basic function test flow;
the front-stage optical switch array comprises N1 × M optical switches, the public end of each optical switch realizes the optical interface coupling of N OTDR test units, and the optical switch branches realize the traversing coupling of M stations;
the rear-stage optical switch array comprises M1 × N optical switches, the common end of each optical switch realizes the coupling of the test optical fiber interfaces of M stations, and the optical switch branches realize the traversing coupling of N OTDR test units;
wherein, N represents the number of OTDR test units, M represents the number of stations in a test workshop, N is less than or equal to 32, and N is more than or equal to M and less than or equal to 2N;
the multi-core buffer transmission optical fiber has the core number of M, provides an optical transmission link for optical fiber coupling between the post-stage optical switch array and the test station, and is connected in a one-to-one mode.
2. A high efficiency OTDR test system according to claim 1, characterized in that:
the optical switch cross distribution frame is used for realizing the optical fiber coupling of a front stage optical switch array and a rear stage optical switch array, and the connection method is that the mth channel of the nth 1 x M type optical switch is connected with the nth channel of the mth 1 x N type optical switch in a matching mode.
3. A high efficiency OTDR test method, characterized in that the high efficiency OTDR test system of claim 1 or 2 is used, and comprising the steps of:
receiving an operation instruction of an operator control panel, and forming an operation request buffer to enter an OTDR test request queue;
step two, calculating idle OTDR in the OTDR test unit array in real time, and buffering the idle OTDR test unit array;
step three, matching the idle OTDR test unit with the test request optical fiber link according to the sequence of the two queue buffers;
step four, starting corresponding OTDR measurement according to the test parameters required by the test request;
step five, calling a database test judgment standard according to the test items required by the test request, and judging the test result;
and step six, returning the judgment result to the control panel which provides the corresponding test request.
4. A high efficiency OTDR test method according to claim 3, characterized in that: the computer server sets the priority of different testing ports according to different testing items and testing product batches, and preferentially processes the testing instruction with high weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811074838.XA CN109039440B (en) | 2018-09-14 | 2018-09-14 | Efficient OTDR test system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811074838.XA CN109039440B (en) | 2018-09-14 | 2018-09-14 | Efficient OTDR test system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109039440A CN109039440A (en) | 2018-12-18 |
| CN109039440B true CN109039440B (en) | 2021-11-23 |
Family
ID=64622372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811074838.XA Active CN109039440B (en) | 2018-09-14 | 2018-09-14 | Efficient OTDR test system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109039440B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111147133B (en) * | 2019-12-24 | 2021-09-14 | 武汉理工光科股份有限公司 | Real-time monitoring system and method for traffic flow based on phi-OTDR |
| WO2024023992A1 (en) * | 2022-07-27 | 2024-02-01 | 日本電信電話株式会社 | Optical transmission system and optical path setting/congestion control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101252393A (en) * | 2008-04-01 | 2008-08-27 | 武汉光迅科技股份有限公司 | Optic cable automatic monitoring system with optical fiber automatic switch unit |
| CN102195707A (en) * | 2011-03-24 | 2011-09-21 | 无锡路通光电技术有限公司 | Cascade type automatic monitoring system of optical cable |
| CN204741456U (en) * | 2015-07-09 | 2015-11-04 | 国网吉林省电力有限公司信息通信公司 | Double mode optical fiber line on -line measuring ware |
| US9240855B1 (en) * | 2011-01-05 | 2016-01-19 | Google Inc. | Fiber diagnosis system for point-to-point optical access networks |
| CN206332673U (en) * | 2017-01-10 | 2017-07-14 | 成都中通嘉业科技发展有限公司 | A kind of optical fiber online testing device and its application circuit |
-
2018
- 2018-09-14 CN CN201811074838.XA patent/CN109039440B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101252393A (en) * | 2008-04-01 | 2008-08-27 | 武汉光迅科技股份有限公司 | Optic cable automatic monitoring system with optical fiber automatic switch unit |
| US9240855B1 (en) * | 2011-01-05 | 2016-01-19 | Google Inc. | Fiber diagnosis system for point-to-point optical access networks |
| CN102195707A (en) * | 2011-03-24 | 2011-09-21 | 无锡路通光电技术有限公司 | Cascade type automatic monitoring system of optical cable |
| CN204741456U (en) * | 2015-07-09 | 2015-11-04 | 国网吉林省电力有限公司信息通信公司 | Double mode optical fiber line on -line measuring ware |
| CN206332673U (en) * | 2017-01-10 | 2017-07-14 | 成都中通嘉业科技发展有限公司 | A kind of optical fiber online testing device and its application circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109039440A (en) | 2018-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109039440B (en) | Efficient OTDR test system and method | |
| CN105207712B (en) | A kind of optical module multi-channel parallel test system and method | |
| CN100596079C (en) | WLAN RF index automatic test system | |
| CN101430242B (en) | Apparatus and method used for automatic test of erbium-doped fiber amplifier performance | |
| WO2015196638A1 (en) | Optical fiber detection method, detection device, detection platform and element management system | |
| CN208508943U (en) | A kind of fibre circuit monitoring system | |
| CN108923849A (en) | A kind of batch testing method of high-speed parallel multichannel optoelectronic transceiver module | |
| CN101241040A (en) | Automatic processing method and equipment for optical fiber test analysis and screening cutting | |
| CN113452435A (en) | Difunctional power optical cable network line detection system and method | |
| CN104796192B (en) | A kind of intelligent real-time multichannel optic-fiber monitoring system and method | |
| CN201352228Y (en) | Detecting system and device for production lines | |
| CN103840879A (en) | Optical fiber office direction recognition method, device and system | |
| CN114337821B (en) | Novel intelligent optical fiber wiring unit based on full exchange technology | |
| CN103326773B (en) | A kind of PLC plane waveguide light shunt self-operated measuring unit | |
| CN219420766U (en) | Multi-station DWDM device optical communication test platform | |
| CN112751608A (en) | Multi-station scanning and point-testing sharing integrated system and method based on optical communication test | |
| JP3042595B2 (en) | Optical line maintenance system | |
| US5757527A (en) | Optical fiber transmission system mapping arrangement | |
| JP3042594B2 (en) | Optical line maintenance system | |
| CN216357109U (en) | Wireless optical multichannel expansion module | |
| JP2670143B2 (en) | Channel processing method | |
| WO2016101422A1 (en) | Optical fibre monitoring method and apparatus and optical fibre adapter | |
| CN219368666U (en) | Base industry case inspection detecting system | |
| CN111211833B (en) | Jumper connection resource rapid patrolling device and patrolling method based on optical switch | |
| CN112304571B (en) | Multiplexing device and method for testing light source |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |