OTDR monitoring method and system combined with OLP linkage adjustment

Abstract

The invention discloses an OTDR monitoring method and system combined with OLP linkage adjustment, and relates to the technical field of optical cable communication, and the method comprises the steps: obtaining main line transmission data and standby line transmission data based on an OLP module, and obtaining an optical signal transmission difference value based on difference value calculation; when it is detected that the optical signal transmission difference value is larger than a first threshold value, the working states of the main line and the standby line are switched; starting an OTDR monitoring module based on the first trigger signal; when it is detected that the optical signal transmission difference value is smaller than a second threshold value, an OTDR monitoring module is started based on a second trigger signal; and the OTDR monitoring module performs optical cable detection on the main line based on the first trigger signal and outputs main line detection data, or performs optical cable detection on the standby line based on the second trigger signal and outputs standby line detection data. The OLP module is combined with the OTDR monitoring module, so that the timeliness of optical fiber position defect detection is improved, the maintenance is convenient, and the detection and maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of optical cable monitoring, and in particular to an OTDR monitoring method and system combined with OLP linkage adjustment. Background Art

[0002] OTDR (optical time-domain reflectometer), the optical time domain detection system detects the optical signal transmission data of the optical cable system, and compares the optical path difference data at each position in the optical signal transmission process to accurately obtain the optical fiber defect location.

[0003] Since the existing OTDR system is activated when the optical signal transmission fluctuates or attenuates in the optical cable system, there is a lag in the optical signal detection of the optical cable system, which affects the maintenance convenience of the optical cable system; if the OTDR system is deployed in a real-time monitoring mode for the optical cable system, the working loss of the OTDR system is large, which increases the detection and maintenance cost of the optical cable system. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art. The present invention provides an OTDR monitoring method and system combined with OLP linkage adjustment. By setting an OLP module to automatically monitor and protect the optical cable system and serve as a trigger signal for the OTDR module, the timeliness of the OTDR module in detecting optical fiber position defects is ensured, while the convenience of optical cable system maintenance is improved and the detection and maintenance cost of the optical cable system is reduced.

[0005] The present invention provides an OTDR monitoring method combined with OLP linkage adjustment, the monitoring method comprising: Perform optical signal transmission detection on the optical cable system based on the OLP module to obtain optical signal transmission data; Extracting the main line transmission data and the backup line transmission data from the optical signal transmission data, and obtaining the optical signal transmission difference based on the difference calculation; When detecting that the optical signal transmission difference is greater than a first threshold, switching the working states of the main line and the backup line; Generate a first trigger signal according to a comparison value between the optical signal transmission difference and a first threshold, and start the OTDR monitoring module based on the first trigger signal; When detecting that the optical signal transmission difference is less than a second threshold, generating a second trigger signal according to a comparison value between the optical signal transmission difference and the second threshold, and starting the OTDR monitoring module based on the second trigger signal; The OTDR monitoring module performs optical cable detection on the main line based on the first trigger signal and outputs main line detection data, or the OTDR monitoring module performs optical cable detection on the backup line based on the second trigger signal and outputs backup line detection data.

[0006] Further, the performing optical signal transmission detection on the optical cable system based on the OLP module to obtain optical signal transmission data includes: Outputting the initial optical wave to the optical cable system based on the OLP module, and dividing it into a main line optical signal and a backup line optical signal based on the first optical splitter; Perform optical signal transmission detection on the main line of the optical cable system based on the main line optical signal to obtain the main line transmission data; Based on the optical signal of the backup line, optical signal transmission detection is performed on the backup line of the optical cable system to obtain the backup line transmission data.

[0007] Further, extracting the main line transmission data and the backup line transmission data from the optical signal transmission data, and obtaining the optical signal transmission difference based on the difference calculation includes: The difference between the data transmitted through the main line and the data transmitted through the backup line is calculated, and the calculation formula is: ; in, is the optical signal transmission difference, Transmit data for backup lines, The main line transmits data.

[0008] Further, when detecting that the optical signal transmission difference is greater than a first threshold, switching the working states of the main line and the backup line includes: When it is detected that the optical signal transmission difference is greater than a first threshold, the working states of the main line and the backup line are switched based on the optical switch of the optical cable system.

[0009] Further, generating a first trigger signal according to a comparison value between the optical signal transmission difference and a first threshold, and starting the OTDR monitoring module based on the first trigger signal includes: A plurality of optical signal detection points are arranged on the main line, and the OTDR monitoring module is started based on the first trigger signal; Based on the OTDR monitoring module, optical signal transmission detection is performed on several optical signal detection points of the main line to detect the optical fiber loss position in the main line.

[0010] Further, when the optical signal transmission difference is detected to be less than a second threshold, a second trigger signal is generated according to a comparison value between the optical signal transmission difference and the second threshold, and starting the OTDR monitoring module based on the second trigger signal includes: When detecting that the optical signal transmission difference is less than a second threshold, the OLP module generates a warning signal, and the optical cable system generates an alarm based on the warning signal.

[0011] Further, when the optical signal transmission difference is detected to be less than a second threshold, a second trigger signal is generated according to a comparison value between the optical signal transmission difference and the second threshold, and starting the OTDR monitoring module based on the second trigger signal also includes: The OLP module generates a second trigger signal according to a comparison value between the optical signal transmission difference and the second threshold value, and starts the OTDR monitoring module to perform optical signal transmission detection on the standby line through the second trigger signal.

[0012] Further, the OTDR monitoring module performs optical cable detection on the main line based on the first trigger signal and outputs the main line detection data, or the OTDR monitoring module performs optical cable detection on the backup line based on the second trigger signal and outputs the backup line detection data including: Several optical signal detection points are set on the main line or the backup line, and the optical signal transmission data of the several optical signal detection points are obtained through the OTDR monitoring module; The optical signal transmission data of several optical signal detection points are analyzed by the least square method to obtain the optical fiber defect position of the main line or the backup line, and the main line detection data is generated according to the optical fiber defect position of the main line, or the backup line detection data is generated according to the optical fiber defect position of the backup line.

[0013] Furthermore, the monitoring method further comprises: Compare the data transmitted by the main line and the data transmitted by the backup line by an error threshold, and when the data transmitted by the main line is greater than the error threshold, mark the main line as having an optical transmission defect; and / or When the data transmitted by the standby line is greater than the error threshold, it is marked that there is an optical transmission defect in the standby line.

[0014] The present invention also provides an OTDR monitoring module combined with OLP linkage adjustment, the monitoring system is used to execute the monitoring method, and the monitoring system includes: OTDR monitoring module: provided with a first signal output terminal and a second signal output terminal, the first signal output terminal is connected to the main line signal, and the second signal output terminal is connected to the backup line; OLP module: used to detect the optical signal transmission data of the main line and the backup line in real time, and generate the trigger signal of the OTDR monitoring module according to the optical signal transmission data of the main line and the backup line; Data processing module: used to realize the optical signal transmission data processing of the OLP module and the optical signal detection data processing of the OTDR monitoring module, and generate detection and maintenance instructions.

[0015] The present invention provides an OTDR monitoring method and system combined with OLP linkage adjustment. Based on the combined use of an OLP module and an OTDR module, the OLP module is set to automatically monitor and protect an optical cable system, and detection data of the OLP module is used as a trigger signal of the OTDR module to ensure the timeliness of optical fiber position defect detection by the OTDR module, improve the convenience of optical cable system maintenance, and improve the working efficiency of the OLP module and the OTDR module through the linkage cooperation of the OLP module and the OTDR module, thereby reducing the detection and maintenance cost of the optical cable system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a flow chart of an OTDR monitoring method combined with OLP linkage adjustment in an embodiment of the present invention; Figure 2 is a workflow diagram of an OTDR monitoring method combined with OLP linkage adjustment in an embodiment of the present invention; Figure 3 Schematic diagram of the structural arrangement of the main line and the backup line in an embodiment of the present invention; Figure 4 It is a structural diagram of an OTDR monitoring module combined with OLP linkage adjustment in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1: Figure 1 A flow chart of an OTDR monitoring method combined with OLP linkage adjustment in an embodiment of the present invention is shown, and the monitoring method includes: S11: Perform optical signal transmission detection on the optical cable system based on the OLP module to obtain optical signal transmission data.

[0019] Specifically, based on the OLP module, optical signal transmission detection is performed on the main line of the optical cable system to obtain main line transmission data, and based on the OLP module, optical signal transmission detection is performed on the backup line of the optical cable system to obtain backup line transmission data.

[0020] Furthermore, OLP (Optical Fiber Line Auto Switch Protection Equipment) is an automatic switching monitoring and protection system used to realize real-time monitoring of optical fibers in the optical cable system. It performs test light wave transmission detection on the main line and the backup line, and switches the working status of the main line and the backup line according to the transmission effect to ensure the normal operation of the optical cable system.

[0021] Based on the OLP module, an initial light wave is output to the optical cable system, and based on the first optical splitter, the light wave is divided into a main line optical signal and a backup line optical signal. Based on the main line optical signal, optical signal transmission detection is performed on the main line of the optical cable system to obtain main line transmission data, and the main line transmission data is transmitted on the main line through the main line optical signal, and optical power data of the main line optical signal transmission is obtained through an optical receiver, and marked as main line transmission data.

[0022] Based on the backup line optical signal, optical signal transmission detection is performed on the backup line of the optical cable system to obtain backup line transmission data, which is transmitted on the backup line through the backup line optical signal, and optical power data of the backup line transmission optical signal is obtained through an optical receiver and marked as backup line transmission data.

[0023] Furthermore, the wavelength of the initial light wave can be selected to be around 1550nm, and the optical signal is evenly distributed to the main line and the backup line by using a 50:50 splitting ratio through the first optical splitter. On the main line and the backup line, the transmission light waves of the main line and the backup line are detected by the optical processing device at the receiving end.

[0024] By comparing the main line with the backup line, it can be determined that there may be problems with the main line or the backup line. Based on the OLP module, the OTDR module can be triggered to perform detailed inspections on the main line or the backup line, thereby timely discovering and accurately locating the location of optical fiber defects.

[0025] S12: extracting the main line transmission data and the backup line transmission data from the optical signal transmission data, and obtaining the optical signal transmission difference based on the difference calculation.

[0026] The main line transmission data and the backup line transmission data are extracted from the optical signal transmission data of the optical cable system, and the main line transmission data is subtracted from the backup line transmission data to obtain the optical signal transmission difference.

[0027] The extracting the main line transmission data and the standby line transmission data from the optical signal transmission data, and obtaining the optical signal transmission difference based on the difference calculation comprises: The difference between the data transmitted through the main line and the data transmitted through the backup line is calculated, and the calculation formula is: ; in, is the optical signal transmission difference, Transmit data for backup lines, The main line transmits data.

[0028] S13: When it is detected that the optical signal transmission difference is greater than a first threshold, the working states of the main line and the backup line are switched.

[0029] When it is detected that the optical signal transmission difference is greater than a first threshold, an action trigger signal of the OLP module is generated according to a comparison value of the optical signal transmission difference and the first threshold, an optical switch of the optical cable system is adjusted based on the action trigger signal of the OLP module, and the working states of the main line and the backup line are switched based on the optical switch of the optical cable system.

[0030] Furthermore, when the optical signal transmission difference is greater than a first threshold, it reflects that there is a large optical signal data transmission loss in the main line relative to the backup line. The working states of the main line and the backup line are switched by an optical switch so that the backup line can be connected to the optical cable system for optical signal communication transmission, thereby ensuring the normal operation of the optical cable system.

[0031] S14: Generate a first trigger signal according to a comparison value between the optical signal transmission difference and a first threshold, and start the OTDR monitoring module based on the first trigger signal.

[0032] Specifically, a plurality of optical signal detection points are arranged on the main line, and the OTDR monitoring module is started based on the first trigger signal; Based on the OTDR monitoring module, optical signal transmission detection is performed on several optical signal detection points of the main line to detect the optical fiber loss position in the main line.

[0033] S15: when detecting that the optical signal transmission difference is less than a second threshold, generating a second trigger signal according to a comparison value between the optical signal transmission difference and the second threshold, and starting the OTDR monitoring module based on the second trigger signal; Specifically, when it is detected that the optical signal transmission difference is less than a second threshold, the OLP module generates a warning signal, and the optical cable system generates an alarm based on the warning signal.

[0034] Specifically, when the optical signal transmission difference is detected to be less than a second threshold, a second trigger signal is generated according to a comparison value between the optical signal transmission difference and the second threshold, and starting the OTDR monitoring module based on the second trigger signal further includes: The OLP module generates a second trigger signal according to a comparison value between the optical signal transmission difference and the second threshold value, and starts the OTDR monitoring module to perform optical signal transmission detection on the standby line through the second trigger signal.

[0035] S16: The OTDR monitoring module performs optical cable detection on the main line based on the first trigger signal and outputs main line detection data, or the OTDR monitoring module performs optical cable detection on the backup line based on the second trigger signal and outputs backup line detection data.

[0036] Several optical signal detection points are set on the main line or the backup line, and the optical signal transmission data of the several optical signal detection points are obtained through the OTDR monitoring module; The optical signal transmission data of several optical signal detection points are analyzed by the least square method to obtain the optical fiber defect position of the main line or the backup line, and the main line detection data is generated according to the optical fiber defect position of the main line, or the backup line detection data is generated according to the optical fiber defect position of the backup line.

[0037] Obtain the optical fiber defect location of the main line or backup line and generate corresponding detection data. The defect location can be determined based on the abnormal point of the signal attenuation curve, or by comparing the data of different detection points for positioning and identification.

[0038] By setting multiple detection points on the main line or backup line, the detection data of multiple detection points are obtained as the data basis for least squares analysis, and the precise data collection of the OTDR monitoring module ensures the accuracy of the analysis. The application of least squares method can effectively process multiple data points, reduce the impact of random errors, and improve the accuracy of defect location.

[0039] Specifically, the monitoring method further includes: Compare the data transmitted by the main line and the data transmitted by the backup line by an error threshold, and when the data transmitted by the main line is greater than the error threshold, mark the main line as having an optical transmission defect; and / or When the data transmitted by the standby line is greater than the error threshold, it is marked that there is an optical transmission defect in the standby line.

[0040] The main line and the backup line are detected based on the OLP module, and an error threshold of the main line is set. In this embodiment, according to the structural design of the main line and the backup line, the main line is set with an insertion error of 0~3db. Combined with the line loss of the main line, the error threshold is set to 5db.

[0041] According to the test optical signal sent by the OLP module to the main line, when the optical power reduction value of the test optical signal after passing through the main line is greater than the error threshold, the optical fiber transmission data of the main line is missing.

[0042] Furthermore, the error threshold detection operation and principle of the backup line are the same as the error threshold detection of the main line, and will not be described in detail here.

[0043] Furthermore, by analyzing the optical signal transmission difference between the main line and the backup line, the transmission comparison between the main line and the backup line in the optical cable system can be detected to ensure the accuracy of optical signal transmission by the optical cable system. Based on the error threshold detection of the main line and the backup line, the main line and the backup line can be self-checked for optical fiber defects, thereby improving the accuracy and reliability of the optical cable system in performing optical fiber data transmission maintenance.

[0044] An OTDR monitoring method combined with OLP linkage adjustment provided by an embodiment of the present invention performs real-time monitoring of an optical cable system through an OLP module, and triggers the OTDR monitoring module according to an optical signal transmission difference, thereby realizing the linkage between the OTDR system and the OLP system, improving the real-time performance and accuracy of the optical cable system monitoring, reducing the workload of the OTDR system, and effectively improving the detection efficiency of the OLP module and the OTDR module for the optical cable system and the accuracy of optical signal detection through the coordinated work of the OLP module and the OTDR module.

[0045] Embodiment 2: Figure 2 The flowchart of the OTDR monitoring method combined with OLP linkage adjustment in an embodiment of the present invention is shown, and the monitoring method includes: S101: Sending optical signal data.

[0046] Based on the OLP module, an initial light wave is output to the optical cable system, and based on the first optical splitter, it is divided into a main line optical signal and a backup line optical signal; based on the main line optical signal, an optical signal transmission detection is performed on the main line of the optical cable system to obtain the main line transmission data; based on the backup line optical signal, an optical signal transmission detection is performed on the backup line of the optical cable system to obtain the backup line transmission data.

[0047] S102: Obtaining optical transmission data of the main line.

[0048] Specifically, before the main line optical signal enters the main line, the main line optical signal is split by a second optical splitter into communication light and test light. The communication light is used to meet the data information transmission of the optical cable system and realize the communication function of the optical cable system; the test light is used to detect the optical signal transmission effect of the main line.

[0049] S103: Obtaining optical transmission data of the backup line Specifically, before the backup line optical signal enters the backup line, the third optical splitter is used to split the backup line communication light, so that the backup line optical signal can be split into communication light and test light. The optical signal transmission effect of the backup line is detected based on the test light to obtain the optical transmission data of the backup line.

[0050] Furthermore, the communication light of the main line is the same as the communication light of the backup line, the test light of the main line is the same as the test light of the backup line, based on the "1+1" OLP module working structure formed between the main line and the backup line, and based on comparing the optical signal transmission effect between the main line and the backup line, the working loss of the main line or the backup line can be detected.

[0051] Furthermore, the backup line and the main line use the same optical signal transmission method to perform OLP testing, so that when there is a defect in the main line, the backup line can be instantly switched to perform optical signal communication operations of the optical cable system to ensure the normal operation of the optical cable system.

[0052] S104: Calculate the optical signal transmission difference.

[0053] The difference between the data transmitted through the main line and the data transmitted through the backup line is calculated, and the calculation formula is: ; in, is the optical signal transmission difference, Transmit data for backup lines, The main line transmits data.

[0054] By performing a difference calculation on the main line and the backup line, and subtracting the optical signal transmission data of the main line from the optical signal transmission data of the backup line, the transmission difference of the optical signal information between the backup line and the main line can be obtained, that is, by comparing the optical power intensity between the backup line and the main line, the optical power transmission difference between the backup line and the main line can be obtained, so as to confirm the working status of the main line or the backup line.

[0055] S105: Threshold determination Based on the "1+1" OLP module detection structure between the main line and the backup line, the "1+1" OLP module detection structure has an insertion loss of 0~3db. According to the line loss and insertion loss statistics of the main line and the backup line, in this embodiment, the first threshold is set to 5db and the second threshold is set to -3db.

[0056] The optical transmission difference is compared with a first threshold. If the optical transmission difference is greater than the first threshold, the optical signal transmission data of the main line is missing relative to the optical signal transmission data of the backup line, which reflects that there is an optical fiber transmission defect in the main line.

[0057] The optical transmission difference is compared with the second threshold. If the optical transmission difference is less than the second threshold, the optical signal transmission data of the backup line is missing relative to the optical signal transmission data of the main line, which reflects that the backup line has optical fiber transmission defects.

[0058] By setting the first threshold and the second threshold, combined with the calculated difference between the optical signal transmission data of the main line and the optical transmission data of the backup line, the optical signal transmission status of the main line and the backup line can be preliminarily detected, thereby ensuring that the OTDR module can accurately detect the main line or the backup line.

[0059] S106: Start the OTDR monitoring module.

[0060] Specifically, when the optical signal transmission difference is greater than the first threshold, a first trigger signal is generated according to a comparison value between the optical signal transmission difference and the first threshold, and the OTDR monitoring module is started based on the first trigger signal, so that the OTDR monitoring module can perform optical path difference detection on the main line.

[0061] Specifically, when it is detected that the optical signal transmission difference is less than a second threshold, a second trigger signal is generated according to a comparison value between the optical signal transmission difference and the second threshold, and the OTDR monitoring module is started based on the second trigger signal, so that the OTDR monitoring module can calculate the optical path difference of the backup line.

[0062] S107: Switch the working status of the main line and the backup line.

[0063] Specifically, when the optical signal transmission difference is greater than the first threshold, there is a large optical signal data difference between the main line and the backup line, reflecting that there is a large optical signal data transmission missing between the main line and the backup line. Based on the comparison value of the optical signal transmission difference and the first threshold, an action trigger signal of the OLP module is generated, so that the OLP module can start the optical switch switching according to the action trigger signal, so that the backup line can be connected to the optical cable system for optical signal transmission, thereby ensuring the normal operation of the optical cable system.

[0064] S108: Perform optical path difference detection on the main line.

[0065] Several optical signal detection points are set on the main line, and the optical signal transmission data of several optical signal detection points are obtained through the OTDR monitoring module; The optical signal transmission data of several optical signal detection points are analyzed by the least square method to obtain the optical fiber defect position of the main line, and the main line detection data is generated according to the optical fiber defect position of the main line.

[0066] S109: Perform optical path difference detection on the backup line.

[0067] Several optical signal detection points are set on the backup line, and optical signal transmission data of the several optical signal detection points are obtained through the OTDR monitoring module; The optical signal transmission data of several optical signal detection points are analyzed by the least square method to obtain the optical fiber defect position of the backup line, and the backup line detection data is generated according to the optical fiber defect position of the backup line.

[0068] An OTDR monitoring method combined with OLP linkage adjustment provided by an embodiment of the present invention performs real-time monitoring of an optical cable system through an OLP module, and triggers the OTDR monitoring module according to an optical signal transmission difference, thereby realizing the linkage between the OTDR system and the OLP system, improving the real-time performance and accuracy of the optical cable system monitoring, reducing the workload of the OTDR system, and effectively improving the detection efficiency of the OLP module and the OTDR module for the optical cable system and the accuracy of optical signal detection through the coordinated work of the OLP module and the OTDR module.

[0069] Embodiment three: Figure 4 The schematic diagram of the structure of the OTDR monitoring module combined with the OLP linkage adjustment in an embodiment of the present invention is shown, and the monitoring system includes: OTDR monitoring module 10: is provided with a first signal output terminal and a second signal output terminal, based on the first signal output terminal being connected to the main line signal, based on the second signal output terminal being connected to the backup line, by setting the first signal output terminal and the second signal output terminal, the OTDR monitoring module can meet the monitoring adjustment of the main line and the backup line, thereby improving the working accuracy of the OTDR monitoring module.

[0070] OLP module 20: used for real-time detection of optical signal transmission data of the main line and the backup line, and generating a trigger signal of the OTDR monitoring module 10 according to the optical signal transmission data of the main line and the backup line. The main line and the backup line of the optical cable system are detected through the OLP module 20, and the optical transmission effect between the main line and the backup line in the optical cable system is detected according to the optical signal transmission difference between the main line and the backup line of the optical cable system, so as to improve the accuracy of optical fiber defect maintenance of the optical cable system and improve the reliability of the operation of the optical cable system.

[0071] The data processing module 30 is used to process the optical signal transmission data of the OLP module 20 and the optical signal detection data of the OTDR monitoring module 10, and generate detection and maintenance instructions.

[0072] Specifically, the OTDR monitoring module 10, the OLP module 20 and the data processing module 30 work together to realize real-time monitoring and on-demand detection of the optical cable system. The OLP module 20 is responsible for continuous monitoring and triggers the OTDR monitoring module 10 to perform precise detection when an abnormality is found.

[0073] The embodiment of the present invention provides an OTDR monitoring system combined with OLP linkage adjustment, which realizes real-time monitoring and accurate detection of the optical cable system by combining the two technologies of OLP and OTDR. The OLP module 20 is responsible for real-time monitoring of optical signal transmission data, and when an abnormality is found, the OTDR monitoring module 10 is triggered to perform more detailed detection. The OTDR monitoring module 10 cooperates with the OLP module 20 to improve the timeliness of the optical cable system monitoring, and avoids the high cost problem caused by the continuous operation of the OTDR monitoring module 10.

[0074] A person skilled in the art may understand that all or part of the steps in the various methods of the above embodiments may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the storage medium may include: a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, etc.

[0075] In addition, the embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. An OTDR monitoring method combined with OLP linkage adjustment, characterized in that: The monitoring method comprises: Perform optical signal transmission detection on the optical cable system based on the OLP module to obtain optical signal transmission data; Extracting the main line transmission data and the backup line transmission data from the optical signal transmission data, and obtaining the optical signal transmission difference based on the difference calculation; When detecting that the optical signal transmission difference is greater than a first threshold, switching the working states of the main line and the backup line; Generate a first trigger signal according to a comparison value between the optical signal transmission difference and a first threshold, and start the OTDR monitoring module based on the first trigger signal; When detecting that the optical signal transmission difference is less than a second threshold, generating a second trigger signal according to a comparison value between the optical signal transmission difference and the second threshold, and starting the OTDR monitoring module based on the second trigger signal; The OTDR monitoring module performs optical cable detection on the main line based on the first trigger signal and outputs main line detection data, or the OTDR monitoring module performs optical cable detection on the backup line based on the second trigger signal and outputs backup line detection data.

2. The OTDR monitoring method combined with OLP linkage adjustment as claimed in claim 1, characterized in that: The performing optical signal transmission detection on the optical cable system based on the OLP module to obtain optical signal transmission data includes: Outputting the initial optical wave to the optical cable system based on the OLP module, and dividing it into a main line optical signal and a backup line optical signal based on the first optical splitter; Perform optical signal transmission detection on the main line of the optical cable system based on the main line optical signal to obtain the main line transmission data; Based on the optical signal of the backup line, optical signal transmission detection is performed on the backup line of the optical cable system to obtain the backup line transmission data.

3. The OTDR monitoring method combined with OLP linkage adjustment as claimed in claim 1, characterized in that: The extracting the main line transmission data and the standby line transmission data from the optical signal transmission data, and obtaining the optical signal transmission difference based on the difference calculation comprises: The difference between the data transmitted through the main line and the data transmitted through the backup line is calculated, and the calculation formula is: ； in, is the optical signal transmission difference, Transmit data for backup lines, The main line transmits data.

4. The OTDR monitoring method combined with OLP linkage adjustment as claimed in claim 1, characterized in that: When detecting that the optical signal transmission difference is greater than a first threshold, switching the working states of the main line and the backup line includes: When it is detected that the optical signal transmission difference is greater than a first threshold, the working states of the main line and the backup line are switched based on the optical switch of the optical cable system.

5. The OTDR monitoring method combined with OLP linkage adjustment according to claim 1, characterized in that: The step of generating a first trigger signal according to a comparison value between the optical signal transmission difference and a first threshold, and starting the OTDR monitoring module based on the first trigger signal comprises: A plurality of optical signal detection points are arranged on the main line, and the OTDR monitoring module is started based on the first trigger signal; Based on the OTDR monitoring module, optical signal transmission detection is performed on several optical signal detection points of the main line to detect the optical fiber loss position in the main line.

6. The OTDR monitoring method combined with OLP linkage adjustment according to claim 1, characterized in that: When the optical signal transmission difference is detected to be less than a second threshold, a second trigger signal is generated according to a comparison value between the optical signal transmission difference and the second threshold, and the OTDR monitoring module is started based on the second trigger signal, including: When detecting that the optical signal transmission difference is less than a second threshold, the OLP module generates a warning signal, and the optical cable system generates an alarm based on the warning signal.

7. The OTDR monitoring method combined with OLP linkage adjustment according to claim 1, characterized in that: When the optical signal transmission difference is detected to be less than a second threshold, a second trigger signal is generated according to a comparison value between the optical signal transmission difference and the second threshold, and the OTDR monitoring module is started based on the second trigger signal, and further includes: The OLP module generates a second trigger signal according to a comparison value between the optical signal transmission difference and the second threshold value, and starts the OTDR monitoring module to perform optical signal transmission detection on the standby line through the second trigger signal.

8. The OTDR monitoring method combined with OLP linkage adjustment according to claim 1, characterized in that: The OTDR monitoring module performs optical cable detection on the main line based on the first trigger signal and outputs the main line detection data, or the OTDR monitoring module performs optical cable detection on the backup line based on the second trigger signal and outputs the backup line detection data, including: Several optical signal detection points are set on the main line or the backup line, and the optical signal transmission data of the several optical signal detection points are obtained through the OTDR monitoring module; The optical signal transmission data of several optical signal detection points are analyzed by the least square method to obtain the optical fiber defect position of the main line or the backup line, and the main line detection data is generated according to the optical fiber defect position of the main line, or the backup line detection data is generated according to the optical fiber defect position of the backup line.

9. The OTDR monitoring method combined with OLP linkage adjustment according to claim 1, characterized in that: The monitoring method further comprises: Compare the data transmitted by the main line and the data transmitted by the backup line by an error threshold, and when the data transmitted by the main line is greater than the error threshold, mark the main line as having an optical transmission defect; and / or When the data transmitted by the standby line is greater than the error threshold, it is marked that there is an optical transmission defect in the standby line.

10. An OTDR monitoring module combined with OLP linkage adjustment, characterized in that: The monitoring system is used to perform the monitoring method according to any one of claims 1 to 9, and the monitoring system comprises: OTDR monitoring module: provided with a first signal output terminal and a second signal output terminal, the first signal output terminal is connected to the main line signal, and the second signal output terminal is connected to the backup line; OLP module: used to detect the optical signal transmission data of the main line and the backup line in real time, and generate the trigger signal of the OTDR monitoring module according to the optical signal transmission data of the main line and the backup line; Data processing module: used to realize the optical signal transmission data processing of the OLP module and the optical signal detection data processing of the OTDR monitoring module, and generate detection and maintenance instructions.

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