Intelligent optical cable quality tester

Abstract

The invention relates to an optical cable quality intelligent tester, which comprises a main control chip, and a CPU decoupling circuit, a downloading circuit, an optical data transceiver module, a plurality of optical switches and a plurality of optical path change-over switches which are in communication connection with the main control chip, the plurality of optical path change-over switches are respectively used as a receiving side and a transmitting side of optical path switching, and the main control chip is used for executing a user command, realizing switching of optical fiber channels, signal detection and data processing, and feeding back a detection result to a user; the optical path change-over switch is used for switching signal transmission paths among a plurality of optical fiber channels; and the optical switch is used for switching control of emergency standby signals. According to the technical scheme, the 24-to-1 automatic optical path switching module is integrated, so that continuous signal transmission is ensured, communication interruption caused by fiber breakage is avoided, and the stability and the response speed of an optical fiber network are greatly improved.

Description

Technical Field

[0001] The invention relates to the field of power equipment, and in particular to an intelligent optical cable quality tester. Background Art

[0002] With the rapid development of optical fiber communication technology, optical fiber networks have become the key infrastructure of modern communication systems and are widely used in data centers, communication networks, radio and television, industrial automation and other fields. Optical fiber communication has the advantages of high transmission rate, large bandwidth, strong anti-interference ability, etc., but in optical fiber networks, the switching and management of optical signals still face many technical difficulties.

[0003] Existing fiber optic switching and detection systems mostly rely on manual operation, and the number of fiber optic signals that can be processed is limited, making it difficult to meet the needs of large-scale, efficient signal management. When a network failure occurs, traditional manual switching is not only time-consuming and laborious, but also slow to respond, prone to operational errors, and increased maintenance costs. In addition, with the expansion of fiber optic networks, efficient and low-loss fiber optic signal switching technology has gradually become an urgent need in the industry.

[0004] In the existing technology, optical fiber switching and detection equipment usually uses optical time domain reflectometer (OTDR) to measure signal loss, reflection events, etc. in optical fiber links. However, these systems have blind spots and cannot accurately distinguish closer event points in the optical fiber. Dynamic range, wavelength compatibility and degree of automation also limit their application in long-distance, multi-fiber channel networks. In addition, most devices lack automated switching functions and require manual monitoring of optical signal status and manual switching, resulting in low maintenance efficiency and long fault response time, which is not suitable for high-density and dynamic network environments.

[0005] Therefore, existing technologies cannot fully meet the needs of modern fiber optic networks for automation, high-precision detection and real-time switching. There is an urgent need for an intelligent optical cable quality analysis tester that integrates intelligent detection, automatic switching and real-time monitoring to improve the stability, operation and maintenance efficiency and signal quality reliability of the fiber optic network. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0007] To this end, the purpose of the present invention is to provide an intelligent optical cable quality tester that integrates intelligent detection, automatic switching and real-time monitoring to improve the stability, operation and maintenance efficiency of the optical fiber network and the reliability of signal quality.

[0008] To achieve the above-mentioned purpose, the technical solution of the present invention provides an intelligent optical cable quality tester, including a main control chip and a CPU decoupling circuit, a download circuit, an optical data transceiver module, multiple optical switches and multiple optical path switching switches that are communicatively connected to the main control chip, the multiple optical switches respectively serve as the receiving side and the sending side of the optical switch, and the multiple optical path switching switches respectively serve as the receiving side and the sending side of the optical path switching. The main control chip is used to execute user commands, realize switching of optical fiber channels, signal detection and data processing, and feed back detection results to the user; the optical path switching switch is used to switch signal transmission paths between multiple optical fiber channels; and the optical switch is used for switching control of emergency backup signals.

[0009] In the above technical solution, preferably, the main control chip adopts a STM32F103CRT6 single chip microcomputer.

[0010] In any of the above technical solutions, preferably, the CPU decoupling circuit includes capacitors C46-C50, C66 and C67, a resistor R1, and a crystal oscillator X1. The capacitors C46-C50 are connected in parallel to the VDD_3 terminal of the main control chip and connected to a 3.3V power supply. The capacitors C46-C50 are connected in parallel to the VSS_3 terminal of the main control chip and connected to the GND terminal of the power supply. The capacitors C66 and C67 are connected in series to the GND terminal of the power supply. The resistor R1 and the crystal oscillator X1 are connected in parallel to the capacitors C66 and C67 connected in series and connected to the OSCI terminal and OSCO terminal of the main control chip.

[0011] In any of the above technical solutions, preferably, the download circuit includes a download chip JP27 and resistors R44 and R45, pin 2 of the download chip JP27 is connected to the resistor R44 and then connected to the GND terminal of the power supply, pin 3 of the download chip JP27 is connected to the resistor R45 and then connected to a 3.3V power supply, pins 2, 3 and 4 of the download chip JP27 are respectively connected to the TCK terminal, TMS terminal and NRST terminal of the main control chip, and pins 1 and 5 of the download chip JP27 are respectively connected to the GND terminal and the 3.3V power supply of the power supply.

[0012] In any of the above technical solutions, preferably, the optical data transceiver module includes a data chip A1 and capacitors C1-C4, the VCCR end of the data chip A1 is respectively connected to capacitor C2 and capacitor C3 and then grounded, the VCCT end of the data chip A1 is respectively connected to capacitor C1 and capacitor C4 and then grounded, and the RXD end, SD end and TXD end of the data chip A1 are respectively connected to the RXD1 end, SD end and TXD1 end of the main control chip.

[0013] In any of the above technical solutions, preferably, each of the optical path switching switches is a switching chip SW1, and the switching chip SW1 has eight optical fiber channels, and each optical fiber channel corresponds to a channel port connected to the main control chip.

[0014] In any of the above technical solutions, preferably, each of the optical switches is an optical control chip SW2, the SWT2 / 0 end of the optical control chip SW2 is connected to the SWT2 / 0 end of the main control chip, and the SWT2 / 1 end of the optical control chip SW2 is connected to the SWT2 / 1 end of the main control chip.

[0015] In any of the above technical solutions, preferably, it also includes a power supply circuit, which includes an operational amplifier DB1 and capacitors C68-C71, C14, a power supply chip U33-U35 and a transformer T2. The power supply chips U33-U35 are connected in series and connected to the operational amplifier DB1. The capacitors C68-C71 are connected in parallel at both ends of each power supply chip. The positive and negative poles of the operational amplifier DB1 are connected to the capacitor C14, and the two ends of the transformer T2 are respectively connected to the AC end of the operational amplifier DB1.

[0016] Compared with the prior art, the optical cable quality intelligent tester provided by the present invention has the following advantages:

[0017] Real-time monitoring and automatic switching: By integrating a 24-to-1 automatic optical path switching module, when an abnormality is detected in the main optical fiber signal, the system automatically switches to the backup optical fiber channel within 8 milliseconds to ensure continuous signal transmission and avoid communication interruption caused by fiber breakage, greatly improving the stability and response speed of the optical fiber network;

[0018] Reduce maintenance costs: Automated detection and switching reduce the frequency of manual operations and significantly reduce the cost of operation and maintenance. Compared with the traditional manual switching method, it can reduce the operation and maintenance costs by more than 30% each year;

[0019] Improve equipment utilization: Through real-time monitoring and automatic fault switching, it reduces fiber network downtime, improves the utilization efficiency of network transmission equipment, and brings higher economic benefits to operators and service providers;

[0020] Enhanced network reliability: Through intelligent and automated fiber management functions, the operational stability of the fiber-optic communication network is effectively improved, ensuring the continuity of communication services in the event of sudden failures, and providing more reliable network support for various industries in society. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 The structure diagram of the main control chip involved in the embodiment of the present invention is shown;

[0023] Figure 2 A structural diagram of a CPU decoupling circuit according to an embodiment of the present invention is shown;

[0024] Figure 3 A structural diagram of a download circuit according to an embodiment of the present invention is shown;

[0025] Figure 4 The structure diagram of the optical path switching switch involved in the embodiment of the present invention is shown;

[0026] Figure 5 The structure diagram of the optical data transceiver module involved in the embodiment of the present invention is shown;

[0027] Figure 6 A structural diagram of an optical switch involved in an embodiment of the present invention is shown;

[0028] Figure 7 The structure diagram of the power supply circuit involved in the embodiment of the present invention is shown. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0031] like Figures 1 to 7 As shown, according to an embodiment of the present invention, an intelligent optical cable quality tester includes a main control chip and a CPU decoupling circuit, a download circuit, an optical data transceiver module, a plurality of optical switches and a plurality of optical path switching switches that are communicatively connected to the main control chip, the plurality of optical switches respectively serve as the receiving side and the sending side of the optical switch, the plurality of optical path switching switches respectively serve as the receiving side and the sending side of the optical path switching, the main control chip is used to execute user commands, realize switching of optical fiber channels, signal detection and data processing, and feed back detection results to the user; the optical path switching switch is used to switch signal transmission paths between multiple optical fiber channels; the optical switch is used for switching control of emergency backup signals.

[0032] In this embodiment, the system connects the upstream and downstream through an optical cable containing 24 optical fibers. A 24-to-1 optical path switching switch and a corresponding optical signal monitoring circuit are respectively provided in the upstream and downstream. The control core of the system adopts an STM32 microcontroller for signal monitoring and optical path switching operations.

[0033] Working principle:

[0034] 1. Optical path monitoring: Both upstream and downstream ports are equipped with optical signal monitoring circuits to monitor the signal status of the currently selected optical path. When one end fails to receive an optical signal, the optical signal monitoring circuit will send a feedback signal to the microcontroller.

[0035] 2. Optical path switching mechanism: When signal loss is detected upstream or downstream, the STM32 MCU will immediately command the optical switch system to switch.

[0036] 3. The system first controls two 2-to-1 optical switches to switch the optical signal to the local rack to ensure that the optical signal can continue to be transmitted, and at the same time starts the 24-to-1 optical path switching switch to try to switch to the new optical fiber.

[0037] When a new optical fiber is selected, the MCU sends an optical data signal to the downstream through the data transceiver module. If the downstream can correctly receive the signal, it will be fed back to the upstream; otherwise, the system will continue to switch to the next backup optical fiber until an available optical path is found.

[0038] 4. Signal feedback and recovery: When the upstream and downstream optical signals are successfully connected, the system will switch the optical path back to the initial rack state to ensure that user communication or data transmission returns to normal.

[0039] The system will record the fiber number of the successful switch for reference in subsequent inspection or maintenance.

[0040] 5. Main functions: Automatic switching: When the signal is interrupted, the system can automatically switch the optical path to reduce manual operation and response time.

[0041] 6. Real-time monitoring: Through the optical signal monitoring circuit, the status of the optical fiber signal is monitored in real time, and a quick response is responded after the signal loss is detected.

[0042] 7. Fault recovery: When an optical path failure causes communication interruption, the system can automatically select a backup optical path to ensure the continuity of communication.

[0043] 8. Historical records: The system records the fiber number of each switch to facilitate subsequent maintenance and management.

[0044] Key components:

[0045] STM32 microcontroller: As the main control chip, it is responsible for signal monitoring, switching control, data feedback and other functions.

[0046] 24-to-1 optical path switching switch: responsible for selecting between 24 optical fiber channels to ensure the accuracy and losslessness of signal switching.

[0047] Optical signal monitoring circuit: monitors the optical fiber signal status and provides feedback to the microcontroller whether the optical path needs to be switched.

[0048] like Figure 1 As shown, in the above embodiment, preferably, the main control chip adopts a STM32F103CRT6 microcontroller.

[0049] like Figure 2 As shown, in any of the above embodiments, preferably, the CPU decoupling circuit includes capacitors C46-C50, C66 and C67, a resistor R1, and a crystal oscillator X1. The capacitors C46-C50 are connected in parallel with the VDD_3 terminal of the main control chip to connect to a 3.3V power supply, and the capacitors C46-C50 are connected in parallel with the VSS_3 terminal of the main control chip to connect to the GND terminal of the power supply; the capacitors C66 and C67 are connected in series to the GND terminal of the power supply, and the resistor R1 and the crystal oscillator X1 are connected in parallel to the capacitors C66 and C67 connected in series, and connected to the OSCI terminal and OSCO terminal of the main control chip.

[0050] like Figure 3 As shown, in any of the above embodiments, preferably, the download circuit includes a download chip JP27 and resistors R44 and R45, and pin 2 of the download chip JP27 is connected to the resistor R44 and then connected to the GND terminal of the power supply, and pin 3 of the download chip JP27 is connected to the resistor R45 and then connected to the 3.3V power supply, and pins 2, 3 and 4 of the download chip JP27 are respectively connected to the TCK terminal, TMS terminal and NRST terminal of the main control chip, and pins 1 and 5 of the download chip JP27 are respectively connected to the GND terminal and the 3.3V power supply of the power supply.

[0051] like Figure 5 As shown, in any of the above embodiments, preferably, the optical data transceiver module includes a data chip A1 and capacitors C1-C4, the VCCR end of the data chip A1 is respectively connected to capacitor C2 and capacitor C3 and then grounded, the VCCT end of the data chip A1 is respectively connected to capacitor C1 and capacitor C4 and then grounded, and the RXD end, SD end and TXD end of the data chip A1 are respectively connected to the RXD1 end, SD end and TXD1 end of the main control chip.

[0052] like Figure 4As shown, in any of the above embodiments, preferably, each of the optical path switching switches is a switching chip SW1, and the switching chip SW1 has eight optical fiber channels, and each optical fiber channel corresponds to a channel port connected to the main control chip.

[0053] like Figure 6 As shown, in any of the above embodiments, preferably, each of the optical switches is an optical control chip SW2, the SWT2 / 0 end of the optical control chip SW2 is connected to the SWT2 / 0 end of the main control chip, and the SWT2 / 1 end of the optical control chip SW2 is connected to the SWT2 / 1 end of the main control chip.

[0054] like Figure 7 As shown, in any of the above embodiments, preferably, it also includes a power supply circuit, which includes an operational amplifier DB1 and capacitors C68-C71, C14, power supply chips U33-U35 and a transformer T2. The power supply chips U33-U35 are connected in series and connected to the operational amplifier DB1. The capacitors C68-C71 are connected in parallel at both ends of each power supply chip. The positive and negative poles of the operational amplifier DB1 are connected to the capacitor C14, and the two ends of the transformer T2 are respectively connected to the AC end of the operational amplifier DB1.

[0055] The present invention provides the following main modules:

[0056] Optical path switching switch: used to switch the signal transmission path between multiple optical fiber channels, supporting manual selection and automatic switching of up to 24 optical fiber channels.

[0057] Fiber optic detection: Real-time monitoring of fiber optic signal loss, reflection and fault conditions to help users accurately evaluate fiber optic quality.

[0058] Main control chip: responsible for executing user commands, realizing fiber channel switching, signal detection and data processing, and feeding back detection results to users.

[0059] Display and operation interface: Through the touch screen, users can manually select fiber channels, view real-time test results, and perform system operations.

[0060] Optical data transceiver module: saves detection data and switching logs, and supports exporting detection results to external devices.

[0061] 2. Fiber switching function

[0062] Multi-channel fiber management: The fiber switching module can manage up to 24 fiber channels, and users can manually select the fiber channel to be switched through the touch screen.

[0063] Manual switching operation: After the user selects the target fiber channel on the operation interface, the control module sends a command to the optical path switching switch, and the system automatically performs the fiber channel switching operation.

[0064] Automatic switching function: When the detection module identifies that the signal of a certain fiber channel is abnormal, the system can automatically switch to the backup fiber channel to ensure uninterrupted signal transmission.

[0065] 3. Fiber optic detection function

[0066] Real-time signal detection: By integrating the fiber detection module, the system can detect the real-time signal status of each fiber channel, including signal strength, transmission loss, reflection events, etc.

[0067] Fault location and analysis: The system can identify fault points such as breaks, poor splicing or excessive reflection in the optical fiber by detecting parameters such as signal loss and reflection, generate a detailed event list, and give the precise location of the fault point.

[0068] Test report generation: The system generates loss curves and event reports based on test data to help users understand the overall health status of the fiber link.

[0069] 4. Control and operation interface

[0070] Touch screen operation: The system is equipped with a touch screen. Users can easily select the fiber channel by clicking the screen and view the real-time detection data of the current fiber. The operation interface is simple and intuitive, providing a friendly user experience.

[0071] Real-time status display: The system displays the status of each fiber channel on the screen, including signal strength, loss curve, reflection events and fault location. Users can judge the quality of fiber signals based on this information and make appropriate operational decisions.

[0072] 5. Data recording and storage

[0073] Automatic data recording: The system will automatically record the operation log and test results of each fiber switching, including fiber number, switching time, signal status and other information.

[0074] Data storage and export: Users can save test results and operation records to the device memory, and export them to external devices via USB interface or network for subsequent analysis or archiving. Supports export in multiple formats (such as PDF, CSV) to facilitate sharing and analysis of different systems.

[0075] 6. Signal exception handling

[0076] Automatic fault switching: When the system detects a signal abnormality in the fiber channel (such as breakage, signal attenuation or excessive reflection), the control module will automatically trigger the backup channel switching function and switch the signal to the backup fiber to ensure uninterrupted communication.

[0077] Alarm prompt: When a major fault or signal interruption is detected, the system will issue an alarm prompt through the screen to remind the user to take appropriate measures in time.

[0078] 7. Remote control and monitoring

[0079] Remote operation function: The system supports remote operation and monitoring. Operation and maintenance personnel can log in to the system remotely through the network, view the fiber signal status in real time, and perform remote fault diagnosis and fiber channel switching operations.

[0080] Historical data backtracking: Users can remotely access the historical data records of the device to view past test results and fault handling situations, facilitating long-term management and optimization of the fiber optic network.

[0081] 2. Operation process: The optical fiber switching device manually operates the optical fiber switching through the setting screen, and integrates the real-time detection function of the optical fiber signal. The user can realize the manual switching and detection of the optical fiber signal by clicking the touch screen. The following is a detailed operation plan:

[0082] 1. Device startup and system initialization

[0083] Turn on the power of the device, the system starts and displays the main menu, and the device automatically performs a self-check to ensure that the fiber channel, detection module and control module are normal.

[0084] During the initialization process, the system will self-check the connection status of all fiber channels and display the detection results (normal / faulty).

[0085] 2. Enter the fiber switching and detection interface

[0086] In the main menu interface, the user can select the "Fiber Switching and Detection" option to enter the fiber switching and detection control interface.

[0087] The interface displays the 24 currently connected fiber channels, the status of each fiber (normal, weak signal, fault, etc.) and the test results (such as signal strength, loss, and reflection).

[0088] 3. Select Fiber Channel for Switching and Detection

[0089] Users can manually select the channel to be switched and tested by clicking the fiber channel number on the screen. The real-time status and test results of each fiber will be displayed synchronously on the screen.

[0090] After selecting a fiber channel, the system will display the fiber's detection information, including detailed data such as optical signal strength, loss, and reflection events, to help users evaluate whether the channel is suitable for switching.

[0091] 4. Perform fiber switching

[0092] After the user confirms the selected fiber channel, click the "Switch" button and the system will automatically perform the optical path switching operation.

[0093] The optical path switching switch will close the currently used optical fiber channel according to the user's operating instructions, and switch to the optical fiber channel selected by the user for signal transmission.

[0094] After the switch is completed, the screen will display the current switch status and prompt whether the switch is successful.

[0095] 5. Fiber optic signal detection

[0096] After the switch is completed, the system will automatically detect the signal of the switched fiber channel and display the detection results in real time, including:

[0097] Signal loss: Displays the optical signal loss of the channel and whether there is signal attenuation.

[0098] Reflective Events: Detects and displays reflective events in optical fibers (such as reflections at fiber connectors).

[0099] Fault detection: Identify fault points such as fiber breakage and poor splicing, and generate an event list.

[0100] The test results will be displayed on the screen in the form of graphical curves and event lists, and users can view the fiber loss curve and the location and parameters of each event point.

[0101] 6. Real-time signal monitoring and alarm

[0102] After the switch, the system will enter the real-time signal monitoring mode and continuously detect the signal quality of the fiber channel. If a signal abnormality is detected (such as signal attenuation, excessive reflection intensity or breakage), the system will immediately issue an alarm and suggest that the user switch to the backup fiber channel.

[0103] Users can view the cause of the alarm through the interface and choose whether to switch to other fiber channels.

[0104] 7. Manual or automatic troubleshooting

[0105] If the test results of the current fiber channel show that the signal quality does not meet the standard, the user can choose to "manually switch" to the backup channel, or enable the system's automatic failover function, and the system will automatically switch to the backup channel with the best signal based on the test data.

[0106] After the switch is completed, the system will perform detection again to confirm the signal quality of the new channel.

[0107] 8. Saving and exporting test data

[0108] The results of each detection and switching, including fiber channel number, detection parameters, loss curve, fault point location and other data, will be automatically saved in the device memory.

[0109] Users can export test data to external storage devices through the device's USB interface or network connection for subsequent analysis and archiving.

[0110] The system supports exporting to standard formats such as PDF and CSV, making it easy to share with other systems or generate reports.

[0111] 9. Equipment shutdown and fiber disconnection

[0112] When the detection and switching work is completed, the user can choose to shut down the device. After ensuring that the current fiber channel has been switched to a safe state, the system will prompt the user to disconnect the fiber connection.

[0113] After the equipment is safely shut down, the recorded test data and operation logs are automatically saved.

[0114] In the present invention, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0115] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0116] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0117] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent optical cable quality tester, characterized in that: It includes a main control chip and a CPU decoupling circuit, a download circuit, an optical data transceiver module, multiple optical switches and multiple optical path switching switches that are communicatively connected to the main control chip. The multiple optical switches serve as the receiving side and the sending side of the optical switch respectively, and the multiple optical path switching switches serve as the receiving side and the sending side of the optical path switching respectively. The main control chip is used to execute user commands, realize switching of optical fiber channels, signal detection and data processing, and feed back detection results to the user; the optical path switching switch is used to switch signal transmission paths between multiple optical fiber channels; and the optical switch is used for switching control of emergency backup signals.

2. The optical cable quality intelligent tester according to claim 1, characterized in that: The main control chip adopts the STM32F103CRT6 single chip microcomputer.

3. The optical cable quality intelligent tester according to claim 1 or 2, characterized in that: The CPU decoupling circuit includes capacitors C46-C50, C66 and C67, a resistor R1, and a crystal oscillator X1. The capacitors C46-C50 are connected in parallel to the VDD_3 terminal of the main control chip and connected to a 3.3V power supply. The capacitors C46-C50 are connected in parallel to the VSS_3 terminal of the main control chip and connected to the GND terminal of the power supply. The capacitors C66 and C67 are connected in series to the GND terminal of the power supply. The resistor R1 and the crystal oscillator X1 are connected in parallel to the capacitors C66 and C67 connected in series and connected to the OSCI terminal and OSCO terminal of the main control chip.

4. The optical cable quality intelligent tester according to claim 1 or 2, characterized in that: The download circuit includes a download chip JP27 and resistors R44 and R45. Pin 2 of the download chip JP27 is connected to the resistor R44 and then connected to the GND terminal of the power supply. Pin 3 of the download chip JP27 is connected to the resistor R45 and then connected to the 3.3V power supply. Pins 2, 3 and 4 of the download chip JP27 are respectively connected to the TCK terminal, TMS terminal and NRST terminal of the main control chip. Pins 1 and 5 of the download chip JP27 are respectively connected to the GND terminal and the 3.3V power supply of the power supply.

5. The optical cable quality intelligent tester according to claim 1 or 2, characterized in that: The optical data transceiver module includes a data chip A1 and capacitors C1-C4, the VCCR end of the data chip A1 is connected to capacitors C2 and C3 respectively and then grounded, the VCCT end of the data chip A1 is connected to capacitors C1 and C4 respectively and then grounded, and the RXD end, SD end and TXD end of the data chip A1 are connected to the RXD1 end, SD end and TXD1 end of the main control chip respectively.

6. The optical cable quality intelligent tester according to claim 1 or 2, characterized in that: Each of the optical path switching switches is a switching chip SW1, and the switching chip SW1 has eight optical fiber channels, and each optical fiber channel corresponds to a channel port connected to the main control chip.

7. The optical cable quality intelligent tester according to claim 1 or 2, characterized in that: Each of the optical switches is an optical control chip SW2, the SWT2 / 0 terminal of the optical control chip SW2 is connected to the SWT2 / 0 terminal of the main control chip, and the SWT2 / 1 terminal of the optical control chip SW2 is connected to the SWT2 / 1 terminal of the main control chip.

8. The optical cable quality intelligent tester according to claim 1 or 2, characterized in that: It also includes a power supply circuit, which includes an operational amplifier DB1 and capacitors C68-C71, C14, a power supply chip U33-U35 and a transformer T2. The power supply chips U33-U35 are connected in series and connected to the operational amplifier DB1. The capacitors C68-C71 are connected in parallel at both ends of each power supply chip. The positive and negative poles of the operational amplifier DB1 are connected to the capacitor C14, and the two ends of the transformer T2 are respectively connected to the AC end of the operational amplifier DB1.

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