A method and circuit for detecting fiber optic connectors with adjustable sensitivity

Abstract

A kind of sensitivity adjustable optical fiber connector detection method, it is characterized in that, the method includes the following steps: step 1, infrared detection light is sent using infrared transceiver module, and infrared detection reflected light is received, to detect the physical connection state of the optical fiber connector;Step 2, the infrared detection reflected light is received by delay comparison module, and the reflection signal generated by the infrared detection reflected light is compared with reference voltage to generate comparison signal;Wherein, the delay comparison module is based on adjusting resistance to realize the adjustment of delay window width, and then the sensitivity of the state detection method is adjusted;Step 3, comparison signal is used to activate light emitting diode, and state detection signal is output by filtering module.This application adjusts reference voltage and delay window width, overcomes the displacement error of optical fiber connector, ensures the accuracy of detection result, and expands the application range of method.

Description

Technical Field

[0001] This invention relates to the field of electronic technology, and more specifically, to a method and circuit for detecting fiber optic connectors with adjustable sensitivity. Background Technology

[0002] Currently, in the field of long-distance communication, optical signals are typically transmitted through multiple interconnected optical fibers. Single-mode or multimode optical fibers are detachably connected end-to-end using fiber optic connectors, precisely aligning the two end faces of the fiber. This allows the light energy output from the transmitting fiber to be coupled into the receiving fiber to the maximum extent, thereby reducing losses and errors that may occur during the fiber connection process.

[0003] In practical applications, fiber optic junction boxes are typically used to connect and transmit multiple single-mode or multimode optical fibers. A fiber optic junction box usually contains many fiber optic connectors, each of which can connect two optical fibers end-to-end.

[0004] However, in power systems or other application scenarios, not all fiber optic connectors in a fiber optic junction box may be connected. Furthermore, because fiber optic junction boxes are typically used in harsh or difficult-to-observe environments such as cable towers, maintenance personnel of fiber optic communication systems find it difficult to repeatedly collect, monitor, or even maintain and control the status of each fiber optic connector within the junction box.

[0005] Furthermore, because maintenance personnel will perform on-site operations on multiple fiber optic connectors within the fiber optic junction box to connect and disconnect fibers, thereby adjusting the network architecture of the fiber optic communication system, the insertion and removal of fiber optic connectors is unavoidable. When maintenance personnel operate the fiber optic connectors, slight displacement of the connectors may occur. Accurately capturing the connection status of each connector within the fiber optic junction box when this displacement occurs is a problem that current technology struggles to solve.

[0006] To address the aforementioned issues, there is an urgent need for a fiber optic connector detection method and circuit with adjustable sensitivity. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a fiber optic connector detection method and circuit with adjustable sensitivity. The method uses an infrared transceiver module to detect the fiber optic connector, receiving, processing, and analyzing the infrared detection light reflected by the fiber optic connector to obtain the status detection signal of the fiber optic connector.

[0008] The present invention adopts the following technical solution.

[0009] The first aspect of this invention relates to a sensitivity-adjustable fiber optic connector detection method, comprising the following steps: Step 1, emitting infrared detection light and receiving infrared detection reflected light using an infrared transceiver module to detect the physical connection status of the fiber optic connector; Step 2, receiving the infrared detection reflected light through a delay comparison module and comparing the reflected signal generated by the infrared detection reflected light with a reference voltage to generate a comparison signal; wherein, the delay comparison module adjusts the delay window width based on an adjustable resistor, thereby adjusting the sensitivity of the status detection method; Step 3, activating a light-emitting diode using the comparison signal and outputting a status detection signal through a filtering module.

[0010] Preferably, the delay window width is determined based on the signal interference amplitude of the photodiode in the infrared transceiver module; the optimal resistance value of the adjustment resistor is calculated based on the delay window width, and the current resistance value of the adjustment resistor in the delay comparison module is adjusted based on the optimal resistance value.

[0011] A second aspect of this invention relates to a sensitivity-adjustable fiber optic connector detection circuit. The circuit includes an infrared transceiver module, an adjustment module, a delay comparison module, an indicator module, and a filtering module. The infrared transceiver module emits infrared detection light and receives reflected infrared detection light based on the reflection of the infrared detection light by the fiber optic connector. The adjustment module generates a reference voltage based on its own voltage divider adjustment. The delay comparison module compares the reflected signal generated by the infrared detection light with the reference voltage and generates a comparison signal. The indicator module converts the comparison signal into a light indicator signal for output. The filtering module filters the comparison signal and outputs it to an MCU.

[0012] Preferably, in the infrared transceiver module, the positive terminal of the photodiode emitting infrared detection light is connected to the power supply voltage VCC through a first resistor R1, and the negative terminal is grounded; the collector of the photodiode receiving the reflected infrared detection light is connected to the power supply voltage VCC through a second resistor R2, and is also directly connected to the non-inverting input terminal of the delay comparator module; the emitter of the photodiode is grounded.

[0013] Preferably, the adjustment module includes a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a first capacitor C1; wherein the third resistor R3, the fourth resistor R4, and the fifth resistor R5 are connected end to end and connected between the power supply voltage VCC and ground; the fourth resistor R4 is an adjustable resistor, and the adjustment terminal of the adjustable resistor is connected to the upper plate of the first capacitor C1, and the lower plate of the first capacitor C1 is grounded; the adjustment terminal of the fourth resistor is also connected to the negative phase input terminal of the delay comparison module.

[0014] Preferably, the delay comparison module includes an operational amplifier and an adjustment resistor; wherein the operational amplifier is connected in a positive feedback manner, and the adjustment resistor is located on the positive feedback branch of the operational amplifier; the positive input terminal of the operational amplifier is connected to the infrared transceiver module, the negative input terminal is connected to the adjustment module, and the output terminal is connected to the indicator module and the filter module respectively; the adjustment terminal of the adjustment resistor controls the delay window width based on the control of the external circuit.

[0015] Preferably, the indicator module includes a seventh resistor R7, an eighth resistor R8, and a light-emitting diode; wherein, the seventh resistor R7 is connected between the power supply voltage VCC and the output terminal of the delay comparison module; one end of the eighth resistor R8 is connected to the power supply voltage, and the other end is connected to the positive terminal of the light-emitting diode, and the negative terminal of the light-emitting diode is connected to the output terminal of the delay comparison module.

[0016] Preferably, the filter module is an RC circuit.

[0017] The beneficial effects of this invention are that, compared with the prior art, the fiber optic connector detection method and circuit of this invention, with adjustable sensitivity, can detect fiber optic connectors through an infrared transceiver module. It receives, processes, and analyzes the infrared detection light reflected by the fiber optic connector to obtain the status detection signal of the fiber optic connector. This invention has a clear concept and ingenious structure. By setting multiple detection circuits on the fiber optic connection box, it achieves the detection of the connection status of each fiber optic connector in the connection box. Simultaneously, by adjusting the reference voltage and the delay window width, this method overcomes the displacement error of the fiber optic connector, ensuring the accuracy of the detection results and expanding the application range of the method.

[0018] The beneficial effects of the present invention also include:

[0019] 1. By adding adjusting and variable resistors, the circuit parameters are made adjustable. This not only allows the circuit to be applied in a wider range of environments but also effectively coordinates the detection sensitivity, ensuring that the circuit is not falsely triggered due to excessive sensitivity and achieving stable and reliable operation. Furthermore, the ability to effectively adjust the input voltage also ensures the accuracy of the comparison process.

[0020] 2. The method in this invention achieves an effective balance between detection sensitivity and detection range. When fiber optic connectors are used in power systems, they may be located in harsh environments such as power poles, making them susceptible to various meteorological factors that can cause temperature changes and pole swaying. Furthermore, due to their proximity to high-voltage power lines, they are also prone to severe electromagnetic interference. This invention, however, can adjust the detection sensitivity according to the actual application of the detection circuit, overcoming the influence of electromagnetic interference and other forms of interference on signal noise intensity, thereby ensuring the effectiveness and accuracy of the detection circuit. Attached Figure Description

[0021] Figure 1 This is a schematic diagram illustrating the steps of a sensitivity-adjustable fiber optic connector detection method according to the present invention.

[0022] Figure 2 This is a schematic diagram of a sensitivity-adjustable fiber optic connector detection circuit according to the present invention.

[0023] Figure 3 This is a schematic diagram of the circuit structure of a sensitivity-adjustable fiber optic connector detection circuit according to the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. The embodiments described in this invention are merely some embodiments of this invention, and not all embodiments. Based on the spirit of this invention, all other embodiments not described in this invention obtained by those skilled in the art based on the embodiments described in this invention without creative effort should fall within the protection scope of this invention.

[0025] Figure 1 This is a schematic diagram illustrating the steps of a sensitivity-adjustable fiber optic connector detection method according to the present invention. Figure 1 As shown, in a first aspect, the present invention relates to a method for detecting fiber optic connectors with adjustable sensitivity, the method comprising steps 1 to 3.

[0026] Step 1: Use an infrared transceiver module to emit infrared detection light and receive infrared detection reflected light to detect the physical connection status of the fiber optic connector.

[0027] It is understood that, in one embodiment of the present invention, a detection circuit can be used to detect the physical connection status of the fiber optic connector. During the detection process, an infrared transceiver module can be used to provide infrared detection light output. After this infrared detection light is emitted to the physical interface of the fiber optic connector, if the fiber optic connector is in a connected state or not connected state, there will be completely different reflected light. In other words, there may be a difference between having reflected light and not having it.

[0028] Generally, if the fiber optic connector is connected, the position of the infrared transceiver module can be adjusted so that the fiber optic connector returns the infrared detection light precisely to the infrared transceiver module. The infrared transceiver module then receives this reflected light and processes and analyzes the optical signal. On the other hand, if the fiber optic connector is not connected, the infrared detection light may not be effectively returned to the infrared transceiver module. In this case, the infrared transceiver module will not detect the reflected light, or the intensity of the detected reflected light will not meet the judgment requirements.

[0029] Based on this difference, other parts of the detection circuit in this invention can determine the status of the fiber optic connector based on the differences in the received infrared light signals. Specifically, the detection method of this invention may also include an adjustment module, which can provide a stable reference voltage for the detection circuit itself.

[0030] In addition, this invention can compare the magnitudes of the two voltages mentioned above—that is, the voltage of the electrical signal converted from the infrared detection reflected light generated by the infrared transceiver module and the reference voltage—to obtain a judgment signal indicating whether the state is normal. Here, the electrical signal converted from the infrared detection reflected light is called the reflected signal.

[0031] Step 2 involves receiving the reflected infrared light through a delay comparison module and comparing the reflected signal generated by the infrared light with a reference voltage to generate a comparison signal. The delay comparison module adjusts the delay window width based on an adjustable resistor, thereby regulating the sensitivity of the state detection method.

[0032] It should be noted that since the reflected signal acquires the interface status in real time, in order to ensure the accuracy of the status detection method, this invention adds a certain hysteresis during the comparison process, thereby preventing output jitter during the status change process and ensuring the stability of the output signal.

[0033] Furthermore, in order to ensure the stability of the output signal under different conditions, the circuit structure of this invention allows for individual adjustment of the value of the regulating resistor without changing other parameters. This minimal cost ensures that the circuit can be easily applied to a variety of different environments. Regardless of the amplitude, frequency, or stability of the input signal and the state switching process, this invention can ensure good circuit adaptation simply by fine-tuning the value of the regulating resistor.

[0034] When the signal switching is relatively stable, this invention can also ensure higher circuit sensitivity by reducing the width of the delay window, thereby more accurately indicating the detection status. It is evident that the method in this invention achieves an effective balance between detection sensitivity and detection range.

[0035] For example, in practical applications, the initial position of each fiber optic connector within the fiber optic junction box is relatively fixed. Each infrared transceiver module corresponding to a fiber optic connector is then positioned at a preset angle within the junction box based on this initial position. This ensures that the infrared transceiver module can accurately receive the infrared light reflected from the connector when it is connected. However, in actual operation, if the fiber optic connector is plugged in or unplugged, its angle and position may shift. If this shift occurs, the infrared transceiver module may fail to accurately receive the reflected light. Therefore, even when the fiber optic connector is connected, the infrared transceiver module may not receive the reflected light, or may not receive a sufficient amount of reflected light.

[0036] To address this problem, the present invention further improves the detection circuit while maintaining the overall inventive concept. For example, the magnitude of the reference voltage is made adjustable.

[0037] On the other hand, when the fiber optic connector box is placed in a harsh environment, the position and angle of the fiber optic connector may be unstable due to environmental factors, weather, and other influences, resulting in problems such as jitter. If the intensity of the reflected light is approximately equal to the reference voltage at this time, the output signal may exhibit severe instability. This invention provides a good solution to this problem.

[0038] Specifically, this invention improves detection sensitivity by adjusting the width of the delay window. Since this invention requires LED devices such as indicator modules to receive and display comparison signals, and also uses an MCU to receive and process the compared signals, accurately acquiring and further processing the status of each connector in the fiber optic junction box, signal jitter would result in excessive computational load and could potentially damage the LEDs. Therefore, the circuit sensitivity needs to be adjusted according to requirements while ensuring stable circuit output.

[0039] Preferably, the delay window width is determined based on the signal interference amplitude of the light-emitting diode in the infrared transceiver module; the optimal resistance value of the adjustment resistor is calculated based on the delay window width, and the current resistance value of the adjustment resistor in the delay comparison module is adjusted based on the optimal resistance value.

[0040] It is understood that the signal interference amplitude of the photodiode in this invention can be obtained in various ways. Furthermore, this invention also supports obtaining this interference amplitude data based on historical data. For example, this invention can collect a large amount of historical reflected signals, especially changes in reflected signals under adverse conditions such as fiber optic connector insertion / removal operations, environmental changes, or connector box jitter. Simultaneously, it can use simulation or real circuitry to detect how the photodiode flickers or changes its reflected light after such a signal is input. When the photodiode is not stable enough and its output signal oscillates, if the circuit's sensitivity is too high, it will oscillate along with the photodiode's output, leading to detection failure.

[0041] Furthermore, this invention can even take into account the data acquisition needs of the MCU (Microcontroller Unit) or the blinking speed of the LEDs in the indicator module. To this end, this invention can perform simulations based on historical data and reasonably determine the width of the delay window in the delay comparison module.

[0042] It should be noted that the delay comparison module in this invention can be implemented using a hysteresis comparator. For a hysteresis comparator, the distance between the switching voltages during the rising and falling edges of the signal is the delay window width in this invention. Therefore, appropriately setting the distance of the switching voltages can ensure that the circuit has reasonable sensitivity. Based on the width of the delay window, the resistance value of the adjustment resistor can be calculated while other parameters in the circuit remain unchanged. This invention supports secondary adjustment or trimming of the resistance value.

[0043] Step 3: Activate the LED using the comparison signal and output the status detection signal through the filtering module.

[0044] After improving the circuit's sensitivity, the comparison signal can be output to the photoelectric conversion module and the filtering module, and after the signal stabilizes, it can be output as an indicator signal for status detection.

[0045] Figure 2 This is a schematic diagram of a sensitivity-adjustable fiber optic connector detection circuit according to the present invention. Figure 2As shown, a second aspect of the present invention relates to a sensitivity-adjustable fiber optic connector detection circuit. The circuit includes an infrared transceiver module, an adjustment module, a delay comparison module, an indicator module, and a filtering module. The infrared transceiver module emits infrared detection light and receives reflected infrared detection light based on the reflection of the infrared detection light from the fiber optic connector. The adjustment module generates a reference voltage based on its own voltage divider adjustment. The delay comparison module compares the reflected signal generated by the infrared detection light with the reference voltage and generates a comparison signal. The indicator module converts the comparison signal into a light indicator signal for output. The filtering module filters the comparison signal and outputs it to an MCU.

[0046] Figure 3 This is a schematic diagram of the circuit structure of a sensitivity-adjustable fiber optic connector detection circuit according to the present invention. Figure 3 As shown, preferably, in the infrared transceiver module, the positive terminal of the photodiode that emits infrared detection light is connected to the power supply voltage VCC through the first resistor R1, and the negative terminal is grounded; the collector of the photodiode that receives the reflected infrared detection light is connected to the power supply voltage VCC through the second resistor R2, and is also directly connected to the non-inverting input terminal of the delay comparator module; the emitter of the photodiode is grounded.

[0047] In addition, the adjustment module includes a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a first capacitor C1; wherein, the third resistor R3, the fourth resistor R4, and the fifth resistor R5 are connected end to end and connected between the power supply voltage VCC and ground; the fourth resistor R4 is an adjustable resistor, and the adjustment terminal of the adjustable resistor is connected to the upper plate of the first capacitor C1, and the lower plate of the first capacitor C1 is grounded; the adjustment terminal of the fourth resistor is also connected to the negative phase input terminal of the delay comparison module.

[0048] As can be seen, in the above circuit, not only can the value of the regulating resistor R6 be changed to alter the hysteresis width, but the range of the input signal can also be adjusted by regulating the voltage division ratio of R3, R4, and R5. In this way, the regulating circuit of this invention can fully ensure the circuit's applicability.

[0049] Preferably, the delay comparison module includes an operational amplifier and an adjustment resistor; wherein the operational amplifier is connected in a positive feedback manner, and the adjustment resistor is located on the positive feedback branch of the operational amplifier; the positive input terminal of the operational amplifier is connected to the infrared transceiver module, the negative input terminal is connected to the adjustment module, and the output terminal is connected to the indicator module and the filter module respectively; the adjustment terminal of the adjustment resistor controls the delay window width based on the control of the external circuit.

[0050] The indicator module includes a seventh resistor R7, an eighth resistor R8, and a light-emitting diode (LED). The seventh resistor R7 is connected between the power supply voltage VCC and the output terminal of the delay comparator module. One end of the eighth resistor R8 is connected to the power supply voltage, and the other end is connected to the positive terminal of the LED. The negative terminal of the LED is connected to the output terminal of the delay comparator module.

[0051] Preferably, the filter module is an RC circuit.

[0052] It should be noted that the output signal of this invention can be received by an MCU device, thereby enabling real-time monitoring and judgment of the connection status of multiple fiber optic connectors. This judgment can then be used to further indicate the network connection status and provide relevant maintenance strategy support for maintenance personnel.

[0053] It is understood that a device including the MCU may have corresponding hardware structures and / or software modules for executing each function in order to implement the various functions provided in the embodiments of this application. Those skilled in the art should readily recognize that, based on the algorithm steps of the examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0054] This application embodiment can divide the device containing the MCU into functional modules according to the above method example. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods.

[0055] The MCU can be a central processing unit (CPU), or it can be replaced by a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), or other hardware. Alternatively, the FPGA or other hardware can work together with the CPU as a processor.

[0056] Additionally, the device containing the MCU may also include components such as memory and hard disk. The memory can be read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions, random access memory (RAM) or other types of dynamic storage devices capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited to these. The memory can exist independently and be connected to the processor via a bus. The memory can also be integrated with the processor.

[0057] The hard drive can be a mechanical hard drive or a solid-state drive (SSD), etc. The interface card can be a host bus adapter (HBA), a redundant array of independent disks (RID), an expander card, or a network interface controller (NIC), etc., and this embodiment of the invention is not limited to these. The interface card in the hard drive module communicates with the hard drive. The storage node communicates with the interface card of the hard drive module to access the hard drive in the hard drive module.

[0058] The hard drive interface can be Serial Attached Small Computer System Interface (SAS), Serial Advanced Technology Attachment (SATA), or Peripheral Component Interconnect Express (PCIe), etc.

[0059] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device containing one or more servers, data centers, etc., that can be integrated with the medium. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state drives (SSDs)).

[0060] The computer program instructions used to perform the operations of this invention may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The computer-readable program instructions may be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, electronic circuitry, such as programmable logic circuitry, field-programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), is personalized by utilizing state information from the computer-readable program instructions. This electronic circuitry can execute the computer-readable program instructions to implement various aspects of the invention.

[0061] The beneficial effects of this invention are that, compared with the prior art, the fiber optic connector detection method and circuit of this invention, with adjustable sensitivity, can detect fiber optic connectors through an infrared transceiver module. It receives, processes, and analyzes the infrared detection light reflected by the fiber optic connector to obtain the status detection signal of the fiber optic connector. This invention has a clear concept and ingenious structure. By setting multiple detection circuits on the fiber optic connection box, it achieves the detection of the connection status of each fiber optic connector in the connection box. Simultaneously, this method overcomes the displacement error of the fiber optic connector by adjusting the reference voltage and the delay window width, ensuring the accuracy of the detection results and expanding the application range of the method.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A method for detecting fiber optic connectors with adjustable sensitivity, characterized in that, The method includes the following steps: Step 1: Use an infrared transceiver module to emit infrared detection light and receive infrared detection reflected light to detect the physical connection status of the fiber optic connector. Step 2: Receive the infrared detection reflected light through the delay comparison module, and compare the reflected signal generated by the infrared detection reflected light with the reference voltage to generate a comparison signal; The delay comparison module adjusts the delay window width based on the adjusting resistor, thereby adjusting the sensitivity of the detection method. Step 3: Activate the LED using the comparison signal and output the status detection signal through the filtering module; The delay window width is determined based on the signal interference amplitude of the photodiode in the infrared transceiver module. The optimal resistance value of the adjusting resistor is calculated based on the delay window width, and the current resistance value of the adjusting resistor in the delay comparison module is adjusted based on the optimal resistance value. Furthermore, the delay comparison module is implemented through a hysteresis comparator. The distance between the switching voltages during the rising and falling edges of the signal is defined as the delay window width. The delay window width is adjusted by adjusting the resistance value of the adjustment resistor to balance the detection sensitivity and detection range.

2. The method for detecting fiber optic connectors with adjustable sensitivity according to claim 1, characterized in that: The method is implemented through a sensitivity-adjustable fiber optic connector detection circuit, which includes an infrared transceiver module, an adjustment module, a delay comparison module, an indication module, and a filtering module; wherein, The infrared transceiver module is used to emit infrared detection light and receive infrared detection reflected light based on the reflection of the infrared detection light through the fiber optic connector. The adjustment module generates the reference voltage based on its own voltage divider adjustment; The delay comparison module is used to compare the reflected signal generated by the infrared detection reflected light with the reference voltage, and to generate a comparison signal. The indicator module is used to convert the comparison signal into an optical indicator signal for output; The filtering module is used to filter the comparison signal and then output it to the MCU.

3. The method for detecting fiber optic connectors with adjustable sensitivity according to claim 2, characterized in that: In the infrared transceiver module, the positive terminal of the photodiode that emits the infrared detection light is connected to the power supply voltage VCC through the first resistor R1, and the negative terminal is grounded. The collector of the photodiode that receives the infrared detection reflected light is connected to the power supply voltage VCC through the second resistor R2, and is also directly connected to the non-inverting input terminal of the delay comparator module. The emitter of the photodiode is grounded.

4. The method for detecting fiber optic connectors with adjustable sensitivity according to claim 2, characterized in that: The adjustment module includes a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a first capacitor C1; wherein, The third resistor R3, the fourth resistor R4 and the fifth resistor R5 are connected end to end and connected between the power supply voltage VCC and ground; The fourth resistor R4 is an adjustable resistor, and the adjustment terminal of the adjustable resistor is connected to the upper plate of the first capacitor C1, while the lower plate of the first capacitor C1 is grounded. The adjustment terminal of the fourth resistor is also connected to the negative phase input terminal of the delay comparison module.

5. The method for detecting fiber optic connectors with adjustable sensitivity according to claim 2, characterized in that: The delay comparison module includes an operational amplifier and an adjustment resistor; wherein... The operational amplifier is connected in a positive feedback manner, and the regulating resistor is located on the positive feedback branch of the operational amplifier; The positive input terminal of the operational amplifier is connected to the infrared transceiver module, the negative input terminal is connected to the adjustment module, and the output terminal is connected to the indicator module and the filter module respectively. The adjustment terminal of the regulating resistor controls the width of the delay window based on the control of the external circuit.

6. The method for detecting fiber optic connectors with adjustable sensitivity according to claim 2, characterized in that: The indicator module includes a seventh resistor R7, an eighth resistor R8, and a light-emitting diode; The seventh resistor R7 is connected between the power supply voltage VCC and the output terminal of the delay comparison module. One end of the eighth resistor R8 is connected to the power supply voltage, and the other end is connected to the positive terminal of the light-emitting diode. The negative terminal of the light-emitting diode is connected to the output terminal of the delay comparison module.

7. The method for detecting fiber optic connectors with adjustable sensitivity according to claim 2, characterized in that: The filtering module is an RC circuit.

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