An intelligent optical fiber detection device based on fast channel switching technology

Abstract

The present invention relates to the field of optical fiber monitoring technology, and discloses an intelligent optical fiber detection device based on fast channel switching technology. The channel switching device at the light source end is the input end of the measured wire bundle, and the channel switching device at the measurement end is the output end of the measured wire bundle. The channel switching device at the light source end is also connected to an OTDR module; the data processing module compares the light source power of the light source end at the same time with the data transmitted by the optical power measurement module to confirm the corresponding relationship of the measured wire bundle; the data transmitted by the OTDR module confirms the fault information of the measured wire bundle, and forms a wiring relationship table and a channel detection result table, which are uploaded to the main control processing module and the results are displayed. The present invention uses fast channel switching technology to reduce channel conversion time and improve multi-channel measurement efficiency; based on fast channel switching, multi-channel measurement is completed in a short time, and after the measurement is completed, the fault location of the faulty channel is automatically performed, providing support for manual data judgment, and having strong adaptability.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber detection, in particular to an intelligent optical fiber detection device based on fast channel switching technology. Background Art

[0002] Fiber optic harnesses have the characteristics of high transmission rate and strong anti-interference ability. The proportion of data transmission harnesses used in aircraft is gradually increasing. The health of the fiber optic network will have a great impact on the correctness of data transmission. Therefore, in the daily inspection and maintenance of the aircraft, it is necessary to test the health of the fiber optic network and quickly locate the cause of the fault.

[0003] The devices in the fiber optic network are connected to the network switches by several fiber optic channels. The transmission direction of each channel is fixed and the corresponding relationship is unique. During inspection, maintenance personnel need to know the corresponding relationship between the channels of the devices in advance, connect the two ends to the light source and optical power meter respectively, and form a measurement path before they can perform corresponding measurements and check whether the attenuation value of the optical channel meets the requirements, thereby judging the health of the network.

[0004] At present, common technical defects include the fact that the optical channel detection scheme is a single-channel detection, and the docking relationship of the tested wire harness needs to be mastered before detection. Application No. CN201910955548.4 Fiber quality detection device and detection method, according to the docking relationship, detection units are set at both ends of the tested optical fiber to complete the channel quality detection; there are also problems such as slow optical channel switching speed, and the need to traverse and check according to the established procedures. The detection efficiency of multi-channel wire harnesses with irregular arrangements is low, and the line can only be judged by detecting the optical channel loss value. The fault point cannot be located, and the measurement data can only be simply compared. It is impossible to provide more reference information and other information for users. Summary of the invention

[0005] In view of the above shortcomings and deficiencies, the present invention provides an intelligent fiber optic detection device based on fast channel switching technology, which can automatically and quickly complete the confirmation of fiber correspondence and the detection of channel health status, locate the faulty channel, and provide users with data analysis by printing reports. The invention comprises: a main control processing module, an optical power measuring module, a light source end, an OTDR module, a data processing module and a channel switching module. The main control processing module is respectively connected with the optical power measuring module, the light source, the OTDR module and the data processing module and is connected with a host computer through a communication interface. The channel switching module comprises a light source end channel switching device connected with the light source end and a measuring end channel switching device connected with the optical power measuring module. The light source end channel switching device is the input end of the measured wire bundle, and the measuring end channel switching device is the output end of the measured wire bundle. The light source end channel switching device is also connected with the OTDR module. The data processing module receives result data transmitted by the optical power measuring module and the OTDR module. The data processing module compares the light source power of the light source end at the same time with the data transmitted by the optical power measuring module to confirm the corresponding relationship of the measured wire bundle. The fault information of the measured wire bundle is confirmed by the data transmitted by the OTDR module, and a wiring relationship table and a channel detection result table are formed and uploaded to the main control processing module, and the result is displayed by the host computer.

[0006] The host computer sets the basic test information including: the number of tested harness channels, the tested harness length information, and confirms the test plan including: channel switching time interval and light source power; the host computer transmits the basic test information and test plan to the main control processing module through the communication interface, and the main control processing module starts the light source end and the optical power measurement module according to the test plan to start the test.

[0007] The light source end is a measurement signal source, which provides light source for path detection and OTDR detection of the measured wire harness. After the light source end is started, the detection begins, and the power is switched according to the test plan to provide two light sources: strong light and weak light. After the detection is completed, the light source is turned off.

[0008] The channel switching device includes a driving motor, the output shaft of which is connected to the grating structure. The driving motor sets the rotation time according to the switching time interval of the test scheme and sets the rotation angle according to the number of wire beam channels to be tested. The light source enters from the injection point of the grating structure of the channel switching device at the light source end, is led out to different wire beam channels to be tested through its grating structure, and is led out to different tested paths of the optical power measurement module through the grating structure of the channel switching device at the measurement end. The optical power measurement module uploads the power measurement result to the data processing module.

[0009] The grating structure is selected according to the optical fiber bundle under test with different numbers of channels. The grating structure channels include 48 channels, 36 channels, 24 channels, 12 channels, etc., to meet the measurement requirements of multi-channel optical fiber bundles.

[0010] The optical power measurement module detects the attenuation of the light source signal in the path, and periodically uploads the measurement result to the data processing module according to the reporting period set by the main control processing module.

[0011] The data processing module confirms the corresponding relationship of the measured wiring harness as follows: the channel of the channel switching device at the light source end is not switched, the channels of the channel switching device at the measuring end are traversed, the channel with the smallest attenuation is selected as the path, and the corresponding path information is recorded; the grating structure channel of the channel switching device at the light source end is switched once, and the traversal action at the measuring end is repeated; after completing the switching of all channels at the light source end, a wiring relationship table and a channel detection result table are formed and uploaded to the main control processing module.

[0012] The data processing module confirms the fault information of the measured wire harness as follows: the channel switching device at the light source end switches to the fault channel, the OTDR module starts the test, calculates the fault information position of the measured wire harness in combination with the length information of the measured wire harness, draws the event curve, forms a fault position confirmation table, and uploads the information to the main control processing module.

[0013] The communication interface supports 1000 / 100 / 10M adaptive network interface, serial port interface, USB interface, and the communication interface is connected to the host computer through network communication, serial port communication, etc.

[0014] The present invention has the following beneficial effects and advantages:

[0015] The present invention utilizes fast channel switching technology to reduce channel conversion time and improve multi-channel measurement efficiency; based on fast channel switching, multi-channel measurement is completed in a short time, channel matching is intelligently completed according to the measurement results, and detection work is completed when the user does not master the channel correspondence relationship. After the measurement is completed, the fault location of the fault channel is automatically performed, and the measurement data processing and display are complete, providing support for manual data judgment. The interactive software has low requirements on the host computer and strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a functional block diagram of an intelligent optical fiber detection device based on fast channel switching technology of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the channel switching device of the present invention;

[0018] Figure 3 This is a diagram of the data report format. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings. Figure 1As shown, the present invention is an intelligent optical fiber detection device based on fast channel switching technology, including: a main control processing module, an optical power measurement module, a light source end, an OTDR module, a data processing module and a channel switching module, the main control processing module is respectively connected to the optical power measurement module, the light source, the OTDR module, and the data processing module and is connected to the host computer through a communication interface; the channel switching module includes a light source end channel switching device connected to the light source end and a measurement end channel switching device connected to the optical power measurement module, the light source end channel switching device is the input end of the measured wire bundle, the measurement end channel switching device is the output end of the measured wire bundle, and the light source end channel switching device is also connected to the OTDR module; the channel switching module sends PWM waves with different duty cycles to the drive motor according to information such as the switching time interval, so that the drive motor drives the grating structure to rotate a specific angle to form different paths, thereby realizing a fast switching function;

[0020] The data processing module receives the result data transmitted by the optical power measurement module and the OTDR module. The data processing module compares the light source power at the light source end at the same time with the data transmitted by the optical power measurement module to confirm the corresponding relationship of the measured wire harness; the data transmitted by the OTDR module confirms the fault information of the measured wire harness, and forms a wiring relationship table and a channel detection result table, which are uploaded to the main control processing module, and the results are displayed on the host computer.

[0021] Specifically, the communication interface supports 1000 / 100 / 10M adaptive network interface, serial port interface, USB interface, and the communication interface is connected to the host computer through network communication, serial port communication, etc.

[0022] The host computer sets the basic test information including: the number of tested harness channels, the tested harness length information, and confirms the test plan including: channel switching time interval and light source power; the host computer transmits the basic test information and test plan to the main control processing module through the communication interface, and the main control processing module starts the light source end and the optical power measurement module according to the test plan to start the test.

[0023] The light source end is the measurement signal source, which provides light source for the path detection and OTDR detection of the tested wiring harness. After the light source end is started, the detection begins, and the power is switched according to the test plan, providing two light sources: strong light (about 4.5dBm) and weak light (about 1.5dBm). After the detection is completed, the light source is turned off.

[0024] like Figure 2As shown, the channel switching device includes a driving motor 1, the output shaft of the driving motor 1 is connected to the grating structure 2, the driving motor 1 sets the rotation time according to the switching time interval of the test scheme, and sets the rotation angle according to the number of channels of the measured wire harness; the light source enters from the light source injection point 3 of the grating structure of the channel switching device at the light source end, is led out to different measured channels of the wire harness through its grating structure 2, and is led out to different light source lead-out points 4 of the optical power measurement module through the grating structure of the channel switching device at the measurement end, that is, in the measured path, and the optical power measurement module uploads the power measurement result to the data processing module. The grating structure 2 is selected according to the optical fiber measured wire harness with different numbers of channels, and the channels of the grating structure 2 include 48 channels, 36 channels, 24 channels, 12 channels, etc., which meet the measurement requirements of multi-channel optical fiber wire harnesses.

[0025] The optical power measurement module detects the attenuation of the light source signal in the path, and periodically uploads the measurement result to the data processing module according to the reporting period set by the main control processing module.

[0026] The data processing module confirms the corresponding relationship process of the measured wiring harness as follows: the channel of the channel switching device at the light source end is not switched, the channels of the channel switching device at the measuring end are traversed, the channel with the smallest attenuation is selected as the path, and the corresponding path information is recorded; the grating structure 2 channels of the channel switching device at the light source end are switched once, and the traversal action at the measuring end is repeated; after completing the switching of all channels at the light source end, a wiring relationship table and a channel detection result table are formed and uploaded to the main control processing module.

[0027] The data processing module confirms the fault information of the tested wiring harness as follows: the channel switching device at the light source end switches to the fault channel, the OTDR module starts the test, calculates the fault information position of the tested wiring harness based on the length information of the tested wiring harness, draws the event curve, forms a fault position confirmation table, and uploads the information to the main control processing module.

[0028] After the detection is completed, the host computer is connected through the communication interface to form the following Figure 3 The data report shown is for users to analyze network health data and provide data support for manual judgment of abnormal points. The communication form is network communication, serial communication, etc. It can be connected to a single machine or a network, with diverse use environments and strong adaptability.

[0029] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments after knowing the basic creative concepts; therefore, the claims should be interpreted as including the preferred embodiments and various modifications and variations of the invention without departing from the spirit and scope of the invention, so that these modifications and variations of the invention fall within the scope of the claims of the present invention and their equivalent technologies.

Claims

1. An intelligent optical fiber detection device based on fast channel switching technology, characterized in that: include: A main control processing module, an optical power measurement module, a light source end, an OTDR module, a data processing module and a channel switching module. The main control processing module is respectively connected to the optical power measurement module, the light source, the OTDR module, and the data processing module and is connected to the host computer through a communication interface; The channel switching module includes a light source end channel switching device connected to the light source end and a measurement end channel switching device connected to the optical power measurement module, the light source end channel switching device is the input end of the measured wire bundle, and the measurement end channel switching device is the output end of the measured wire bundle; the measurement end channel switching device and the light source end channel switching device both include a driving motor, the output shaft of the driving motor is connected to the grating structure, the driving motor sets the rotation time according to the switching time interval of the test scheme, and sets the rotation angle according to the number of channels of the measured wire bundle; the light source enters from the injection point of the grating structure of the light source end channel switching device, is led out to different measured channels of the wire bundle through its grating structure, and is led out to different measured paths of the optical power measurement module through the grating structure of the measurement end channel switching device, and the optical power measurement module uploads the power measurement result to the data processing module; The channel switching device at the light source end is also connected to the OTDR module; the data processing module receives the result data transmitted by the optical power measurement module and the OTDR module, and the data processing module compares the light source power at the light source end at the same time with the data transmitted by the optical power measurement module to confirm the corresponding relationship of the measured wiring harness; the data transmitted by the OTDR module confirms the fault information of the measured wiring harness, and forms a wiring relationship table and a channel detection result table, which are uploaded to the main control processing module, and the results are displayed by the host computer.

2. The intelligent optical fiber detection device based on fast channel switching technology according to claim 1, characterized in that: The host computer sets the basic test information including: the number of tested harness channels, the tested harness length information, and confirms the test plan including: channel switching time interval and light source power; the host computer transmits the basic test information and test plan to the main control processing module through the communication interface, and the main control processing module starts the light source end and the optical power measurement module according to the test plan to start the test.

3. The intelligent optical fiber detection device based on fast channel switching technology according to claim 1, characterized in that: The light source end is a measurement signal source, which provides light source for path detection and OTDR detection of the measured wire harness. After the light source end is started, the detection begins, and the power is switched according to the test plan to provide two light sources: strong light and weak light. After the detection is completed, the light source is turned off.

4. The intelligent optical fiber detection device based on fast channel switching technology according to claim 1, characterized in that: The grating structure is selected according to the optical fiber bundle under test with different numbers of channels. The grating structure channels include 48 channels, 36 channels, 24 channels, and 12 channels, meeting the measurement requirements of multi-channel optical fiber bundles.

5. The intelligent optical fiber detection device based on fast channel switching technology according to claim 1, characterized in that: The optical power measurement module detects the attenuation of the light source signal in the path, and periodically uploads the measurement result to the data processing module according to the reporting period set by the main control processing module.

6. The intelligent optical fiber detection device based on fast channel switching technology according to claim 1, characterized in that: The data processing module confirms the corresponding relationship of the measured wire harness specifically as follows: the channel of the channel switching device at the light source end is not switched, the channels of the channel switching device at the measuring end are traversed, the channel with the smallest attenuation is selected as the path, and the corresponding path information is recorded; The grating structure channel of the channel switching device at the light source end is switched once, and the traversal action at the measurement end is repeated; after completing the switching of all channels at the light source end, a wiring relationship table and a channel detection result table are formed and uploaded to the main control processing module.

7. The intelligent optical fiber detection device based on fast channel switching technology according to claim 1, characterized in that: The data processing module confirms the fault information of the measured wire harness as follows: the channel switching device at the light source end switches to the fault channel, the OTDR module starts the test, calculates the fault information position of the measured wire harness in combination with the length information of the measured wire harness, draws the event curve, forms a fault position confirmation table, and uploads the information to the main control processing module.

8. The intelligent optical fiber detection device based on fast channel switching technology according to claim 1, characterized in that: The communication interface supports 1000M or 100M or 10M adaptive network interface, serial port interface, USB interface, and the communication interface is connected to the host computer in the form of network communication and serial port communication.

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