Online optical time domain reflectometer

Abstract

The invention discloses an online optical time domain reflectometer, and relates to the field of optical fiber detection, the online optical time domain reflectometer comprises an optical time domain reflectometer body, the outer wall of the optical time domain reflectometer body is fixedly connected with a wiring board, the outer wall of the wiring board is fixedly connected with an optical fiber connection port, and a network cable interface is embedded in the outer wall of the optical time domain reflectometer body. The optical time domain reflectometer body comprises a shell, a base and an online optical fiber detection mechanism. Received optical signal data are processed and analyzed, information such as attenuation, loss, connection points and fault points in an optical fiber is analyzed by measuring parameters such as signal strength and time delay in real time, data transmission and remote operation are achieved through network connection, and through online OTDR (Optical Time Domain Reflectometer) testing, the data transmission efficiency is improved. A user can know the quality conditions, including attenuation, loss, reflection loss and other parameters, of the whole optical fiber network, the network state is monitored in real time, potential problems are found in time, online optical fiber detection is achieved, and the detection efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber detection, in particular to an online optical time domain reflectometer. Background Art

[0002] OTDR (Optical Time Domain Reflectometer) is a device that uses the back signal generated by Rayleigh scattering and Fresnel reflection of optical fiber to detect the parameters of optical fiber link. It determines the attenuation, connection loss, fault location and other information in the optical fiber by sending short pulse optical signals and measuring the reflection or scattering of the optical signal.

[0003] However, in the prior art, existing optical time domain reflectometers are usually large and require manual operation and individual testing, with relatively low work efficiency. They cannot monitor the status of each node in real time when the network is running, and the test coverage is limited. Therefore, some sudden failures or problems cannot be discovered immediately, and some hidden problems are missed. Summary of the invention

[0004] The object of the present invention is to provide an online optical time domain reflectometer to solve the problems mentioned in the above background technology, that the existing optical time domain reflectometers are usually large and require manual operation and separate testing, have relatively low working efficiency, cannot monitor the status of each node in real time when the network is running, and have limited test coverage, so some sudden faults or problems cannot be discovered immediately, and some hidden problems are missed.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an online optical time domain reflectometer, comprising an optical time domain reflectometer body, the outer wall of the optical time domain reflectometer body is fixedly connected with a wiring board, the outer wall of the wiring board is fixedly connected with an optical fiber connection port, the outer wall of the optical time domain reflectometer body is embedded with a network cable interface, the optical time domain reflectometer body comprises a housing, a base and an online optical fiber detection mechanism, the housing is clamped on both sides of the base, the online optical fiber detection mechanism is installed on the inner wall of the base, and the online optical fiber detection mechanism comprises a light source and a transmitting module, a detector, a timing controller, a data processing unit and a monitoring alarm module; The light source and transmitting module are responsible for generating optical pulse signals for testing, connecting with the optical fiber connection port and the network cable interface, and supporting 4G / Ethernet access; The detector is used to capture the optical signal returned from the optical fiber under test and convert it into an electrical signal for processing and analysis; The timing controller is used to control the time delay and duration of the optical pulse signal emitted by the light source, supports single-mode optical fiber testing, and supports a measurement distance of 0-150km; The data processing unit is used to perform patrols between various interfaces, process and analyze the optical signal data obtained from the detector, and realize fault location; The monitoring alarm module is used for power failure, network anomaly and wireless loss alarm monitoring.

[0006] Preferably, both inner walls of the shell are provided with card slots, the inside of the card slots are carded with card plates, and the card plates are fixedly connected to the outer wall of the base.

[0007] Preferably, heat dissipation holes are formed through the outer walls on both sides of the shell.

[0008] Preferably, both side outer walls of the base are provided with fixing grooves, and above the fixing grooves there are pulling grooves, which are provided on the bottom surface of the shell.

[0009] Preferably, a fixing plate is sleeved on the outer wall of the wiring board, and the fixing plate is fixedly connected to the outer wall of the optical time domain reflectometer body. Fixing holes are penetrated through the outer walls at both ends of the fixing plate, and a pull ring is provided on one side of the fixing hole, and the pull ring is fixedly connected to the outer wall of the fixing plate.

[0010] Preferably, the light source and the emission module include a laser and an exciter; The laser is used to generate a high-brightness optical pulse signal as an input signal for testing the optical fiber; The exciter is used to control the switching and modulation of the light source to generate the required optical pulse signal.

[0011] Preferably, the detector includes a receiving module, a light detector, a signal processor and a data output interface; The receiving module includes an optical receiver and a signal amplifier, which are used to receive the optical signal reflected and scattered from the optical fiber under test; The photodetector is used to convert the optical signal into an electrical signal; The signal processor is used to amplify, filter and digitize the received electrical signal; The data output interface is used to transmit the processed optical signal data to the data processing unit for further analysis and display.

[0012] Preferably, the data processing unit includes a data receiving and storing module, a data processing and analyzing module, a fault locating module and a data transmission module; The data receiving and storing module receives the optical signal data from the receiving module and performs storage processing on it; The data processing and analysis module is used to process and analyze the received optical signal data, and convert the received optical signal data into a waveform graph or a curve graph for output; The fault location module is used to determine the fault location existing in the optical fiber network by analyzing the waveform graph or the curve graph; The data transmission module supports data exchange and communication with other devices through 4G SIM card wireless network connection and wired network connection.

[0013] Preferably, the monitoring and alarm module includes an abnormality detection module, an alarm notification module, a history recording module and a remote monitoring module; The anomaly detection module detects possible anomalies in the optical fiber network in real time by monitoring the signal strength, reflectivity, and fault condition parameters of the optical fiber network; The alarm notification module is used to detect abnormal conditions. When the alarm and monitoring module detects abnormal conditions, it will emit sound or light signals or display alarm information to remind users to pay attention and take timely measures to troubleshoot the problem; The history record module is used to record historical alarm information, including the time, specific location and processing of the abnormality, for user query and analysis; The remote monitoring module remotely checks the operation status and alarm information of the optical fiber network through a network connection, thereby realizing remote monitoring and management of the network.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by processing and analyzing the received optical signal data, the attenuation, loss, connection point, fault point and other information in the optical fiber are analyzed in real time by measuring the signal strength, time delay and other parameters, and data transmission and remote operation are realized through network connection. Through online OTDR testing, users can understand the quality status of the entire optical fiber network, including attenuation, loss, reflection loss and other parameters, monitor the network status in real time, discover potential problems in time, realize online optical fiber detection, and improve detection efficiency.

[0015] 2. In the present invention, the card slot and the card plate are connected so that the housing and the base can be easily and quickly connected and installed. In the subsequent use, the card plate and the card slot can be quickly separated by pushing the card slot, and the housing can be quickly removed from the base, which is convenient for the user to perform maintenance operations on the online optical fiber detection mechanism in the optical time domain reflectometer body.

[0016] 3. In the present invention, through the cooperation of the receiving module and the detector, the OTDR can receive and analyze the optical signal transmitted back from the tested optical fiber, quickly and accurately measure the loss, reflection and fault conditions of the optical fiber, and the user can remotely view the operation status and alarm information of the optical fiber network through the network connection, realize remote monitoring and management of the network, so as to timely discover abnormal conditions in the optical fiber network and respond quickly, thereby improving the reliability and stability of the network. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an online optical time domain reflectometer of the present invention; Figure 2 It is a rear view structure schematic diagram of an online optical time domain reflectometer of the present invention; Figure 3 It is a schematic diagram of the internal structure of the shell part of an online optical time domain reflectometer of the present invention; Figure 4 It is a structural schematic diagram of an online optical fiber detection mechanism of an online optical time domain reflectometer of the present invention; Figure 5 The present invention is a structural schematic diagram of an online optical time domain reflectometer data processing unit.

[0018] In the figure: 1. OTDR body; 11. housing; 12. base; 13. fixing slot; 14. heat dissipation hole; 15. online optical fiber detection mechanism; 16. card slot; 17. card plate; 18. pull slot; 2. fixing plate; 21. fixing hole; 3. pull ring; 4. terminal block; 41. optical fiber connection port; 42. network cable interface. DETAILED DESCRIPTION

[0019] 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 implementation regulations described 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.

[0020] Example 1: Reference Figure 1-5 As shown: an online optical time domain reflectometer, including an optical time domain reflectometer body 1, the outer wall of the optical time domain reflectometer body 1 is fixedly connected with a wiring board 4, the outer wall of the wiring board 4 is fixedly connected with an optical fiber connection port 41, the outer wall of the optical time domain reflectometer body 1 is embedded with a network cable interface 42, the optical time domain reflectometer body 1 includes a shell 11, a base 12 and an online optical fiber detection mechanism 15, the shell 11 is clamped on both sides of the base 12, the online optical fiber detection mechanism 15 is installed on the inner wall of the base 12, and the online optical fiber detection mechanism 15 includes a light source and a transmitting module, a detector, a timing controller, a data processing unit and a monitoring alarm module; The light source and transmitting module are responsible for generating optical pulse signals for testing, connecting to the optical fiber connection port 41 and the network cable interface 42, and supporting 4G / Ethernet access; The detector is used to capture the optical signal returned from the optical fiber under test and convert it into an electrical signal for processing and analysis; The timing controller is used to control the time delay and duration of the optical pulse signal emitted by the light source, supports single-mode fiber testing, and supports a measurement distance of 0-150km; The data processing unit is used to perform patrols between various interfaces, process and analyze the optical signal data obtained from the detector, and realize fault location; specifically, the data processing unit includes a data receiving and storage module, a data processing and analysis module, a fault location module, and a data transmission module; The data receiving and storing module receives the optical signal data from the receiving module and stores and processes it; The data processing and analysis module is used to process and analyze the received optical signal data, and convert the received optical signal data into a waveform graph or a curve graph for output; The fault location module is used to determine the fault location in the optical fiber network by analyzing the waveform or curve graph; The data transmission module supports data exchange and communication with other devices through 4G SIM card wireless network connection and wired network connection; The monitoring alarm module is used for power failure, network anomaly and wireless loss alarm monitoring.

[0021] In this embodiment, the optical fiber to be tested is plugged in through the optical fiber connection port 41, and the network cable interface 42 is used to connect to the wired network. The light source and the transmitting module of the online optical fiber detection mechanism 15 are used to generate optical pulse signals for testing. These optical pulses will be transmitted along the optical fiber and reflected back. By processing and analyzing the received optical signal data, the attenuation, loss, connection point, fault point and other information in the optical fiber are analyzed in real time by measuring the signal strength, time delay and other parameters. Data transmission and remote operation are achieved through network connection. Through the online OTDR test, the user can understand the quality status of the entire optical fiber network, including parameters such as attenuation, loss, and reflection loss, monitor the network status in real time, discover potential problems in time, and locate the fault.

[0022] Embodiment 2: Figure 1-3 As shown, both ends of the inner wall of the shell 11 are provided with a card slot 16, and the inside of the card slot 16 is clamped with a card plate 17, and the card plate 17 is fixedly connected to the outer wall of the base 12. Both sides of the outer wall of the shell 11 are penetrated with heat dissipation holes 14, and both sides of the outer wall of the base 12 are provided with fixing grooves 13, and the upper part of the fixing groove 13 is provided with a pull groove 18, and the pull groove 18 is provided on the bottom surface of the shell 11. The outer wall of the wiring board 4 is sleeved with a fixing plate 2, and the fixing plate 2 is fixedly connected to the outer wall of the optical time domain reflectometer body 1. Both ends of the outer wall of the fixing plate 2 are penetrated with fixing holes 21, and one side of the fixing hole 21 is provided with a pull ring 3, and the pull ring 3 is fixedly connected to the outer wall of the fixing plate 2.

[0023] In this embodiment, the present invention can conveniently and quickly connect and install the housing 11 and the base 12 through the clamping connection between the clamping slot 16 and the clamping plate 17. In the subsequent use process, the clamping slot 18 can be pushed through the fixing slot 13 of the base 12, so that the clamping plate 17 and the clamping slot 16 are quickly separated, and the housing 11 is quickly removed from the base 12, which is convenient for the user to perform maintenance operations on the online optical fiber detection mechanism 15 in the optical time domain reflectometer body 1.

[0024] Embodiment 3: According to Figure 4-5 As shown, the light source and transmitting module include a laser and an exciter; the laser is used to generate a high-brightness optical pulse signal as an input signal for testing the optical fiber; the exciter is used to control the switching and modulation of the light source to generate the required optical pulse signal; The detector includes a receiving module, a light detector, a signal processor and a data output interface; the receiving module includes an optical receiver and a signal amplifier, which are used to receive the light signals reflected and scattered from the tested optical fiber; the light detector is used to convert the light signal into an electrical signal; the signal processor is used to amplify, filter and digitize the received electrical signal; the data output interface is used to transmit the processed light signal data to the data processing unit for further analysis and display; The monitoring and alarm module includes an anomaly detection module, an alarm notification module, a history record module and a remote monitoring module; the anomaly detection module detects possible anomalies in the optical fiber network in real time by monitoring the signal strength, reflectivity and fault condition parameters of the optical fiber network; when the alarm notification module detects an abnormal situation, the alarm and monitoring module will emit sound, light signals or display alarm information to remind users to pay attention and take timely measures to troubleshoot the problem; the history record module is used to record historical alarm information, including the time, specific location and handling of the abnormality, for users to query and analyze; the remote monitoring module remotely views the operation status and alarm information of the optical fiber network through a network connection, thereby realizing remote monitoring and management of the network.

[0025] In this embodiment, a high-brightness optical pulse signal is generated by a laser as an input signal for testing the optical fiber, and an exciter is used to control the switching and modulation of the light source to generate the required optical pulse signal. Through the cooperation of the receiving module and the detector, the OTDR can receive and analyze the optical signal transmitted back from the tested optical fiber, and quickly and accurately measure the loss, reflection and fault conditions of the optical fiber. Through the alarm monitoring module, the user can remotely view the operation status and alarm information of the optical fiber network through a network connection, realize remote monitoring and management of the network, thereby timely discovering abnormal conditions in the optical fiber network and responding quickly, thereby improving the reliability and stability of the network.

[0026] The method of using the device and its working principle are as follows: the optical fiber to be tested is plugged in through the optical fiber connection port 41, and the network cable interface 42 is used to connect to the wired network. A high-brightness optical pulse signal is generated by a laser as the input signal for the test optical fiber. The light source is controlled by an exciter to switch and modulate to generate an optical pulse signal for testing. These optical pulses are transmitted along the optical fiber and reflected back. The received optical signal data is processed and analyzed, and the attenuation, loss, connection point, fault point and other information in the optical fiber are analyzed in real time by measuring the signal strength, time delay and other parameters. Data transmission and remote operation are realized through network connection. Through online OTDR testing, users can understand the quality status of the entire optical fiber network, including Including attenuation, loss, reflection loss and other parameters. Through the cooperation of the receiving module and the detector, the OTDR can receive and analyze the optical signal transmitted back from the tested optical fiber, and quickly and accurately measure the loss, reflection and fault conditions of the optical fiber. Through the alarm monitoring module, the user can remotely view the operation status and alarm information of the optical fiber network through a network connection, and realize remote monitoring and management of the network. Through the card connection between the card slot 16 and the card board 17, the present invention can easily and quickly card-connect and install the housing 11 and the base 12, and in the subsequent use process, the dialing slot 18 can be dialed through the fixed slot 13 of the base 12, so that the card board 17 and the card slot 16 are quickly separated, and then the housing 11 is quickly removed from the base 12.

[0027] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An online optical time domain reflectometer, comprising an optical time domain reflectometer body (1), characterized in that: The outer wall of the optical time domain reflectometer body (1) is fixedly connected to a wiring board (4), the outer wall of the wiring board (4) is fixedly connected to an optical fiber connection port (41), the outer wall of the optical time domain reflectometer body (1) is embedded with a network cable interface (42), the optical time domain reflectometer body (1) comprises a housing (11), a base (12) and an online optical fiber detection mechanism (15), the housing (11) is snap-connected to two sides of the base (12), the online optical fiber detection mechanism (15) is installed on the inner wall of the base (12), and the online optical fiber detection mechanism (15) comprises a light source and a transmitting module, a detector, a timing controller, a data processing unit and a monitoring alarm module; The light source and the transmitting module are responsible for generating optical pulse signals for testing, are connected to the optical fiber connection port (41) and the network cable interface (42), and support 4G / Ethernet access; The detector is used to capture the optical signal returned from the optical fiber under test and convert it into an electrical signal for processing and analysis; The timing controller is used to control the time delay and duration of the optical pulse signal emitted by the light source, supports single-mode optical fiber testing, and supports a measurement distance of 0-150km; The data processing unit is used to perform patrols between various interfaces, process and analyze the optical signal data obtained from the detector, and realize fault location; The monitoring alarm module is used for power failure, network anomaly and wireless loss alarm monitoring.

2. The online optical time domain reflectometer according to claim 1, characterized in that: The inner walls at both ends of the housing (11) are provided with a card slot (16), the interior of the card slot (16) is card-engaged with a card plate (17), and the card plate (17) is fixedly connected to the outer wall of the base (12).

3. The online optical time domain reflectometer according to claim 2, characterized in that: Heat dissipation holes (14) are provided through the outer walls on both sides of the housing (11).

4. The online optical time domain reflectometer according to claim 3, characterized in that: The outer walls on both sides of the base (12) are provided with fixing grooves (13), and a pull groove (18) is provided above the fixing groove (13), and the pull groove (18) is provided on the bottom surface of the housing (11).

5. The online optical time domain reflectometer according to claim 1, characterized in that: The outer wall of the wiring board (4) is sleeved with a fixing plate (2), the fixing plate (2) is fixedly connected to the outer wall of the optical time domain reflectometer body (1), the outer walls at both ends of the fixing plate (2) are penetrated by fixing holes (21), a pull ring (3) is provided on one side of the fixing hole (21), and the pull ring (3) is fixedly connected to the outer wall of the fixing plate (2).

6. The online optical time domain reflectometer according to claim 1, characterized in that: The light source and emission module include a laser and an exciter; The laser is used to generate a high-brightness optical pulse signal as an input signal for testing the optical fiber; The exciter is used to control the switching and modulation of the light source to generate the required optical pulse signal.

7. The online optical time domain reflectometer according to claim 1, characterized in that: The detector includes a receiving module, a light detector, a signal processor and a data output interface; The receiving module includes an optical receiver and a signal amplifier, which are used to receive the optical signal reflected and scattered from the optical fiber under test; The photodetector is used to convert the optical signal into an electrical signal; The signal processor is used to amplify, filter and digitize the received electrical signal; The data output interface is used to transmit the processed optical signal data to the data processing unit for further analysis and display.

8. The online optical time domain reflectometer according to claim 1, characterized in that: The data processing unit includes a data receiving and storing module, a data processing and analyzing module, a fault locating module and a data transmission module; The data receiving and storing module receives the optical signal data from the receiving module and performs storage processing on it; The data processing and analysis module is used to process and analyze the received optical signal data, and convert the received optical signal data into a waveform graph or a curve graph for output; The fault location module is used to determine the fault location existing in the optical fiber network by analyzing the waveform graph or the curve graph; The data transmission module supports data exchange and communication with other devices through 4G SIM card wireless network connection and wired network connection.

9. The online optical time domain reflectometer according to claim 1, characterized in that: The monitoring and alarm module includes an abnormality detection module, an alarm notification module, a history recording module and a remote monitoring module; The anomaly detection module detects possible anomalies in the optical fiber network in real time by monitoring the signal strength, reflectivity, and fault condition parameters of the optical fiber network; The alarm notification module is used to detect abnormal conditions. When the alarm and monitoring module detects abnormal conditions, it will emit sound or light signals or display alarm information to remind users to pay attention and take timely measures to troubleshoot the problem; The history record module is used to record historical alarm information, including the time, specific location and processing of the abnormality, for user query and analysis; The remote monitoring module remotely checks the operation status and alarm information of the optical fiber network through a network connection, thereby realizing remote monitoring and management of the network.

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