Clamp-on signal generator and optical fiber microbend low-loss leakage light monitoring method

Abstract

This invention belongs to the field of optical fiber communication technology and discloses a clamping signal generator and a method for monitoring low-loss leakage light in micro-bending optical fibers. A first clamping head has first grooves on both sides, and movable push blocks are rotatably disposed within these first grooves. Both movable push blocks are drively connected to the output end of a loss disturbance mechanism. The loss disturbance mechanism simultaneously drives the two movable push blocks to swing and bend the optical fiber. The loss disturbance mechanism has at least a gradual extension mode and a frequency-based extension / retraction mode. A photoelectric detector is used to monitor the leakage power of the optical fiber. A second clamping head has a second groove extending along a first direction, and a top block is fixedly disposed at the opening of the second groove and partially blocks the second groove. A clamping drive module is used to move the first working module and / or the second working module to clamp or release the optical fiber. This invention ensures rapid optical fiber positioning without interrupting service, reducing reliance on personnel.

Description

Technical Field

[0001] This invention relates to the field of optical fiber communication technology, and in particular to a clamp-type signal generator and a method for monitoring low-loss leakage light in micro-bending optical fibers. Background Technology

[0002] With the expansion of fiber optic communication networks and the dense deployment of data centers, the number of fiber optic links is growing exponentially. In scenarios such as computer rooms and optical distribution frames, a large number of optical fibers are tightly coiled or bundled. Currently, routine maintenance, fault diagnosis, and route identification of optical fibers rely on pre-attached physical tags. However, in practice, missing, damaged, incorrectly labeled, or illegible tags are common, making it difficult to quickly and accurately identify specific fiber optic routes.

[0003] In existing technologies, when locating or diagnosing unmarked optical fibers, the common practice is to disconnect the service optical fiber from the equipment port at the suspected upstream end of the link, connect it to a dedicated test light source to inject a high-intensity test light signal, and then manually search for the optical fiber with light signal output from a large number of optical fibers at the downstream end using equipment such as an optical power meter or a visible light fiber finder.

[0004] This method has obvious drawbacks: First, it forces a service interruption, as plugging and unplugging optical fibers will cut off the communication services carried by the fiber core, making the service unavailable during maintenance, which does not meet the high availability requirements of modern communication networks; second, it is cumbersome and inefficient, requiring at least two people to coordinate upstream and downstream, and only one optical fiber can be located at a time, which is time-consuming and inefficient when faced with a large number of optical fiber inspection tasks; third, it poses operational risks, as frequent plugging and unplugging may damage the end face of the optical fiber connector, bringing new potential link failures. Summary of the Invention

[0005] The purpose of this invention is to provide a clamp-on signal generator and a method for monitoring low-loss leakage light in micro-bending optical fibers, which can quickly locate optical fibers without interrupting services, reduce dependence on the number of personnel, and enable single-person operation.

[0006] To achieve this objective, the present invention adopts the following technical solution: Clamp-on signal generator, including: The first working module includes a first clamping head, a loss disturbance mechanism, movable push blocks, and a photoelectric detector. The first clamping head has first grooves on both sides along a first direction. The movable push blocks are rotatably disposed in the corresponding first grooves. Both movable push blocks are connected to the output end of the loss disturbance mechanism. The loss disturbance mechanism is used to simultaneously drive the two movable push blocks to swing and bend the optical fiber. The loss disturbance mechanism has at least a gradual extension mode and a telescoping mode at a set frequency. The photoelectric detector is installed on the first clamping head and is used to monitor the leakage power of the optical fiber. The second working module includes a second clamping head and a top block. The second clamping head has a second groove extending along the first direction. The top block is fixedly disposed at the opening of the second groove and partially blocks the second groove. The unblocked areas on both sides of the second groove can avoid the bent portion of the optical fiber. A clamping drive module is provided, wherein the first working module and / or the second working module are connected to the clamping drive module for transmission. The clamping drive module is used to drive the first working module and / or the second working module to move, thereby causing the first clamping head and the top block to clamp or release the optical fiber.

[0007] As an alternative to the clamp-on signal generator, the loss disturbance mechanism includes a motor with a telescopic part, a connector, and two movable push rods. The connector is fixedly connected to the telescopic part. One end of each movable push rod is rotatably connected to the movable push block, and the other end of each movable push rod is rotatably connected to the connector. The motor is used to simultaneously drive the two movable push blocks to swing and bend the optical fiber.

[0008] As an alternative to the clamp-type signal generator, the movable push block includes an integrally connected first segment and a second segment. The first segment is provided with a first through hole, and the first clamping head is provided with a second through hole. The first working module further includes: The first pin is inserted into the first through hole and the second through hole.

[0009] As an alternative to the clamp-type signal generator, the second section is provided with a third through hole, and one end of the movable push rod is provided with a fourth through hole. The first working module also includes: The second pin is inserted into the third and fourth through holes.

[0010] As an alternative to the clamp-type signal generator, two photoelectric detectors are spaced apart along the first direction on the first clamping head.

[0011] As an alternative to the clamp-on signal generator, the second working module further includes: Two auxiliary push blocks are rotatably connected to both sides of the top block, and the auxiliary push blocks are set in a one-to-one correspondence with the movable push blocks; An elastic reset mechanism is provided, wherein the auxiliary push block is connected to the elastic reset mechanism, and the elastic reset mechanism always has a tendency to press the auxiliary push block against the movable push block.

[0012] As an alternative to the clamp-type signal generator, the elastic reset mechanism includes: The mounting post is disposed inside the second clamping head; The torsion spring includes a first straight segment, a helical segment, and a second straight segment connected in sequence. The helical segment is sleeved on the mounting post, and the first straight segment and the second straight segment respectively abut against the corresponding auxiliary push block.

[0013] As an alternative to the clamp-type signal generator, the elastic reset mechanism includes: Two springs, one end of which is connected to the first clamping head, and the other end of which is connected to the corresponding auxiliary push block.

[0014] A method for monitoring low-loss leakage light in micro-bend optical fibers, using a clamp-on signal generator as described in any of the preceding methods, includes the following steps: S1. Reduce the distance between the first clamping head and the second clamping head and clamp the optical fiber; S2. The loss disturbance mechanism simultaneously drives two movable push blocks to gradually bend the corresponding two positions on the optical fiber. S3. The photoelectric detector monitors the leakage power of the optical fiber in real time until it reaches a predetermined loss value; S4. Determine that the extension length of the loss disturbance mechanism at this time is the low-loss set extension length; S5. Control the loss disturbance mechanism to extend and bend the optical fiber at a set frequency and a set extension length.

[0015] As an alternative to the fiber micro-bending low-loss leakage light monitoring method, the following steps are also included: S6. The optical fiber is working normally, and the loss disturbance mechanism continues to extend and vibrate for a set time, then waits for the detector downstream of the optical fiber to identify it. S7. After the detector completes the identification, the loss disturbance mechanism resets and releases the optical fiber.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The clamping signal generator provided by this invention uses a clamping drive module to reduce or increase the distance between the first and second working modules. The first clamping head cooperates with the top block to clamp or release the optical fiber. When the loss disturbance mechanism is in the gradual extension mode, the movable push blocks on both sides of the first clamping head simultaneously push the optical fiber to bend. When the photoelectric detector detects that the leakage power of the optical fiber reaches a predetermined loss value, the bending amount of the optical fiber is at its minimum. When it is necessary to locate the corresponding optical fiber, the loss disturbance mechanism enters a set frequency extension mode and regularly vibrates upstream of the optical fiber. Because the optical fiber is bent, the optical signal leaks from the fiber sheath, resulting in a decrease in optical signal power. By simply monitoring whether there is a change in optical power downstream of the optical fiber, the corresponding optical fiber can be identified without interrupting optical fiber services. This facilitates rapid optical fiber location, reduces reliance on personnel, and enables single-person operation.

[0017] The fiber micro-bending low-loss leakage light monitoring method provided by this invention reduces the distance between the first clamping head and the second clamping head to clamp the fiber, while the loss disturbance mechanism simultaneously drives two movable push blocks to gradually bend two corresponding positions on the fiber; the photoelectric detector monitors the leakage power of the fiber in real time until it reaches a predetermined loss value; the extension length of the loss disturbance mechanism at this time is determined to be the low-loss set extension length; the loss disturbance mechanism is controlled to extend and bend the fiber at a set frequency and a set extension length to realize the monitoring of low-loss leakage light in the fiber micro-bending. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram showing the optical fiber located between the first and second working modules of the clamp-on signal generator in an embodiment of the present invention. Figure 2 This is a schematic diagram of the clamping signal generator bending and disturbing the optical fiber in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the first working module in an embodiment of the present invention; Figure 4 This is an exploded view of the first working module in an embodiment of the present invention (the first and second pins are not shown). Figure 5 This is a schematic diagram of the structure of the second working module in an embodiment of the present invention; Figure 6 This is an exploded view of the second working module in an embodiment of the present invention; Figure 7 This is a flowchart of the fiber micro-bending low-loss leakage light monitoring method in an embodiment of the present invention.

[0020] Figure label: 1. First working module; 2. Second working module; 3. Optical fiber; 11. First clamping head; 111. First groove; 112. Second through hole; 12. Movable push block; 121. First through hole; 122. Third through hole; 13. Photoelectric detector; 14. Motor; 141. Telescopic part; 15. Movable push rod; 151. Fourth through hole; 16. Connector; 21. Second clamping head; 211. Second groove; 22. Top block; 23. Auxiliary push block; 24. Mounting post; 25. Torsion spring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] To ensure uninterrupted service while rapidly locating optical fibers, reducing reliance on personnel and enabling single-person operation, this embodiment provides a clamp-on signal generator and a method for monitoring low-loss leakage light in micro-bending optical fibers. The following describes the method in conjunction with... Figures 1 to 7 The specific content of this embodiment will be described in detail. It should be noted that the first direction mentioned in this embodiment is... Figure 1 The X direction in the equation.

[0026] The clamping signal generator provided in this embodiment includes a first working module 1, a second working module 2, and a clamping drive module. The first working module 1 includes a first clamping head 11, a loss disturbance mechanism, movable push blocks 12, and a photoelectric detector 13. The first clamping head 11 has first grooves 111 on both sides along a first direction. The movable push blocks 12 are rotatably disposed within the corresponding first grooves 111. Both movable push blocks 12 are drively connected to the output end of the loss disturbance mechanism. The loss disturbance mechanism is used to simultaneously drive the two movable push blocks 12 to swing and bend the optical fiber 3. The loss disturbance mechanism has at least a gradual extension mode and a frequency-based extension / retraction mode. The photoelectric detector 13 is mounted on the first clamping head 11 and is used to monitor the leakage power of the optical fiber 3. In the gradual extension mode, the two movable push blocks 12 swing simultaneously to bend the optical fiber 3 until the photoelectric detector 13 detects that the leakage power of the optical fiber 3 reaches a predetermined loss value. The bending amount of the optical fiber 3 at this point is the minimum bending amount, ensuring the accuracy of the monitoring. When it is necessary to locate the corresponding optical fiber 3, the loss disturbance mechanism switches to a set frequency extension mode, causing regular vibration of the optical fiber 3. This causes the optical signal to leak from the surface due to the bending of the optical fiber 3, resulting in a corresponding reduction in optical signal power. By monitoring the change in the downstream optical power of the optical fiber 3, the corresponding optical fiber 3 can be quickly and accurately identified. This process does not require interruption of the service of the optical fiber 3, greatly improving maintenance efficiency. The second working module 2 includes a second clamping head 21 and a top block 22. The second clamping head 21 has a second groove 211 extending along a first direction. The top block 22 is fixedly disposed at the opening of the second groove 211 and partially blocks the second groove 211. The unblocked areas on both sides of the second groove 211 can avoid the bent portion of the optical fiber 3. When it is necessary to bend the optical fiber 3, the movable push block 12 squeezes the optical fiber 3 and bends it towards the unblocked areas on both sides of the second groove 211. The second groove 211 also serves to avoid the bending. The first working module 1 and / or the second working module 2 are connected to the clamping drive module for transmission. The clamping drive module is used to drive the first working module 1 and / or the second working module 2 to move, thereby enabling the first clamping head 11 and the top block 22 to clamp or release the optical fiber 3, so as to flexibly meet the monitoring needs of optical fiber 3 in different scenarios.

[0027] In summary, the clamp-on signal generator provided in this embodiment not only enables non-destructive identification and monitoring of optical fiber 3, avoiding the risk of service interruption, but also greatly simplifies the operation process, reduces reliance on the number of personnel, and supports efficient operation by a single person. Simultaneously, by controlling the bending amount and vibration frequency of optical fiber 3, the accuracy and reliability of monitoring are improved, providing a strong guarantee for the stable operation of the optical fiber 3 communication network.

[0028] Furthermore, the loss disturbance mechanism includes a motor 14 with a telescopic part 141, a connector 16, and two movable push rods 15. The motor 14 serves as the power source, and its telescopic part 141 can extend and retract according to preset instructions. The connector 16 is fixedly connected to the telescopic part 141, and the two movable push rods 15 are symmetrically distributed on both sides of the connector 16. One end of each movable push rod 15 is rotatably connected to a movable push block 12, allowing the movable push rod 15 to flexibly push the movable push block 12 to swing; the other end of each movable push rod 15 is rotatably connected to the connector 16, ensuring that under the drive of the motor 14, the two movable push rods 15 can swing synchronously and smoothly and bend the optical fiber 3. During operation, after the motor 14 starts, the telescopic part 141 of the motor 14 begins to extend or retract, driving the two movable push rods 15 to swing synchronously through the connector 16. Due to the rotatable connection between the movable push rod 15 and the movable push block 12, the movable push block 12 can swing along a predetermined trajectory under the push of the movable push rod 15, thereby applying an appropriate bending force to the optical fiber 3 held in the first clamping head 11. This design not only achieves precise control over the bending amount of the optical fiber 3, but also makes the optical fiber 3 subject to regular vibration through the set frequency extension mode of the motor 14.

[0029] Furthermore, the movable push block 12 is L-shaped and includes an integrally connected first segment and a second segment. The first segment is provided with a first through hole 121, and the first clamping head 11 is provided with a second through hole 112. The first working module 1 also includes a first pin, which is inserted into the first through hole 121 and the second through hole 112, realizing a rotational connection between the movable push block 12 and the first clamping head 11. With this connection method, the movable push block 12 can swing around the first pin under the drive of the loss disturbance mechanism, thereby applying a bending force to the optical fiber 3.

[0030] Furthermore, the second section is provided with a third through hole 122, and one end of the movable push rod 15 is provided with a fourth through hole 151. The first working module 1 also includes a second pin, which is inserted into the third through hole 122 and the fourth through hole 151 to realize the rotational connection between the movable push block 12 and the movable push rod 15. This connection method ensures that the movable push rod 15 can effectively transmit the driving force of the motor 14 to the movable push block 12, and also allows the movable push block 12 to swing under the push of the push rod.

[0031] Furthermore, two photoelectric detectors 13 are spaced apart along the first direction on the first clamping head 11. Since the optical power of the optical signal attenuates along the transmission direction after the optical fiber 3 is bent, by adding two photoelectric detectors 13, the transmission direction of the optical signal within the optical fiber 3 can be determined by the difference between the monitoring values ​​of the two photoelectric detectors 13. For example, if the monitoring value of the left photoelectric detector 13 is P1 and the monitoring value of the right photoelectric detector 13 is P2, and the difference between P1 and P2 is positive, it indicates that the optical signal is transmitted from left to right. It should be noted that the clamping signal generator in this embodiment is not affected by the optical signal transmission direction; it can monitor any normally functioning optical fiber 3.

[0032] Furthermore, the second working module 2 also includes an elastic reset mechanism and two auxiliary push blocks 23. The two auxiliary push blocks 23 are rotatably connected to both sides of the top block 22, and the auxiliary push blocks 23 are arranged in a one-to-one correspondence with the movable push blocks 12. The auxiliary push blocks 23 are connected to the elastic reset mechanism, which always tends to press the auxiliary push blocks 23 towards the movable push blocks 12. When the first clamping head 11 and the second clamping head 21 approach each other, the first clamping head 11 cooperates with the top block 22, and the movable push block 12 cooperates with the auxiliary push blocks 23 to clamp the optical fiber 3. Since the auxiliary push blocks 23 are all connected to the elastic reset mechanism, when the loss disturbance mechanism bends the optical fiber 3, the movable push block 12 pushes the optical fiber 3 forward, and the auxiliary push blocks 23 also push the optical fiber 3, increasing the clamping force on the optical fiber 3. After the work is completed, the movable push rod 15 moves backward through the motor 14, the movable push block 12 is pulled backward, and the auxiliary push blocks 23 are pushed by the elastic reset mechanism to squeeze the optical fiber 3 against the movable push block 12 until the optical fiber 3 is pushed and reset.

[0033] Exemplarily, the elastic reset mechanism includes a mounting post 24 and a torsion spring 25. The mounting post 24 is disposed within the second clamping head 21, providing a reliable support point for the installation of the torsion spring 25. The torsion spring 25, as an elastic element, includes a first straight segment, a helical segment, and a second straight segment connected in sequence. The helical segment is sleeved on the mounting post 24, and the first and second straight segments respectively abut against the corresponding auxiliary push blocks 23. When the auxiliary push block 23 is subjected to an external force and rotates, it compresses the torsion spring 25, causing it to generate elastic potential energy. Once the external force disappears, the torsion spring 25 utilizes its stored elastic potential energy to apply a reverse pushing force to the auxiliary push block 23 through the first and second straight segments, causing the auxiliary push block 23 to quickly return to its initial position.

[0034] For example, the elastic reset mechanism includes two springs, one end of which is connected to the first clamping head 11, and the other end of which is connected to the corresponding auxiliary push block 23. This design allows the springs to form an elastic connection between the auxiliary push block 23 and the first clamping head 11, providing a reset force for the auxiliary push block 23. When the auxiliary push block 23 is subjected to an external force and rotates, it compresses the spring, causing the spring to generate elastic potential energy. Once the external force disappears, the spring uses the stored elastic potential energy to push the auxiliary push block 23 back to its initial position, achieving automatic reset of the auxiliary push block 23.

[0035] This embodiment also provides a method for monitoring low-loss leakage light in optical fiber micro-bending. The method uses the clamping signal generator mentioned above to monitor the optical fiber 3 under test, including the following steps: Step S1, Optical fiber 3 clamping: The clamping drive module gradually reduces the distance between the first clamping head 11 and the second clamping head 21 to clamp the optical fiber 3 under test. This step ensures that the optical fiber 3 maintains a relatively stable position during subsequent monitoring, which helps to apply bending force and monitor leakage power. Step S2, Bending operation: The loss disturbance mechanism begins to function, simultaneously driving two movable push blocks 12 to gradually bend two corresponding positions on the optical fiber 3. Step S3, Leakage monitoring: The photoelectric detector 13 monitors the leakage power of the optical fiber 3 in real time until it reaches a predetermined loss value. Step S4, Length determination: When the leakage power reaches the predetermined loss value, the system immediately determines that the extension length of the loss disturbance mechanism is the low-loss set extension length, minimizing the bending amount of the optical fiber 3 while meeting the leakage monitoring requirements. Step S5, Controlling the loss disturbance mechanism to extend and bend the optical fiber 3 at a set frequency and set extension length. This regular stretching and bending operation can superimpose a low-loss characteristic modulation signal onto the original service optical signal without damaging fiber 3.

[0036] Furthermore, the fiber micro-bending low-loss leakage light monitoring method also includes the following steps: S6, allowing the fiber 3 to operate under normal working conditions, while the loss disturbance mechanism continuously extends and vibrates for a set time, and then waits for the detector downstream of the fiber 3 to identify it; S7, after the detector completes the identification, the loss disturbance mechanism resets and releases the clamp on the fiber 3, ensuring that the fiber 3 can return to its original state after the monitoring is completed, without affecting its subsequent normal use.

[0037] The clamp-on signal generator and monitoring method provided in this embodiment have unique advantages in online identification. Using the clamp-on signal generator, operators can apply a micro-bending disturbance to the running fiber 3 without disconnecting the fiber 3 connection or interrupting the service signal. This micro-bending disturbance superimposes a very low-loss characteristic modulation signal onto the original service optical signal. The downstream detector can sensitively capture this characteristic signal, thus achieving online fiber locating without interrupting the service. This feature greatly improves the efficiency and flexibility of fiber 3 monitoring, reducing losses and inconvenience caused by service interruptions. Improved operational efficiency and convenience: In actual operation, operators only need to first use the detector to clamp the fiber 3 to be investigated within the fiber optic rack at the downstream end, and then clamp the clamp-on signal generator sequentially onto the target fiber 3 from the upstream end and start it to quickly scan the entire fiber optic rack. The detector has highly sensitive detection capabilities, enabling it to quickly detect and identify fibers 3 carrying specific modulation characteristics and promptly issue alarms through sound, light, and other means. This method eliminates the need for plugging and unplugging fiber 3, avoiding damage to the fiber 3 port and signal interruption caused by frequent plugging and unplugging. Furthermore, it eliminates the need for multiple operators, allowing a single person to complete the task independently. Compared to traditional methods that may take several days to complete, this method reduces the work time to a few hours, significantly improving operational efficiency and convenience. Ensuring system security and reliability: The entire identification process involves only physical clamping and micro-bending modulation, without interfering with the optical path connection. This means that no damage will be caused to the fiber 3 port during operation, nor will it affect the normal transmission of optical signals, fundamentally eliminating the risk of port damage or link interruption due to improper operation. This feature greatly enhances the safety of maintenance operations, ensures the overall reliability of the network, and provides strong support for the stable operation of the fiber optic communication system.

[0038] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A clamp-on signal generator, characterized in that, include: The first working module (1) includes a first clamping head (11), a loss disturbance mechanism, a movable push block (12), and a photoelectric detector (13). The first clamping head (11) has a first groove (111) on both sides along the first direction. The movable push block (12) is rotatably disposed in the corresponding first groove (111). Both movable push blocks (12) are connected to the output end of the loss disturbance mechanism. The loss disturbance mechanism is used to simultaneously drive the two movable push blocks (12) to swing and bend the optical fiber (3). The loss disturbance mechanism has at least a gradual extension mode and a telescopic mode at a set frequency. The photoelectric detector (13) is mounted on the first clamping head (11). The photoelectric detector (13) is used to monitor the leakage power of the optical fiber (3). The second working module (2) includes a second clamping head (21) and a top block (22). The second clamping head (21) has a second groove (211) extending along the first direction. The top block (22) is fixedly disposed at the opening of the second groove (211) and partially blocks the second groove (211). The unblocked areas on both sides of the second groove (211) can avoid the bent portion of the optical fiber (3). The clamping drive module is connected to the first working module (1) and / or the second working module (2) via a transmission connection. The clamping drive module is used to drive the first working module (1) and / or the second working module (2) to move, thereby causing the first clamping head (11) and the top block (22) to clamp or release the optical fiber (3).

2. The clamp-type signal generator according to claim 1, characterized in that, The loss disturbance mechanism includes a motor (14) with a telescopic part (141), a connector (16) and two movable push rods (15). The connector (16) is fixedly connected to the telescopic part (141). One end of each movable push rod (15) is rotatably connected to the movable push block (12), and the other end of each movable push rod (15) is rotatably connected to the connector (16). The motor (14) is used to simultaneously drive the two movable push blocks (12) to swing and bend the optical fiber (3).

3. The clamp-type signal generator according to claim 2, characterized in that, The movable push block (12) includes an integrally connected first segment and a second segment. The first segment is provided with a first through hole (121), and the first clamping head (11) is provided with a second through hole (112). The first working module (1) further includes: The first pin is inserted into the first through hole (121) and the second through hole (112).

4. The clamp-type signal generator according to claim 3, characterized in that, The second section is provided with a third through hole (122), and one end of the movable push rod (15) is provided with a fourth through hole (151). The first working module (1) also includes: The second pin is inserted into the third through hole (122) and the fourth through hole (151).

5. The clamp-type signal generator according to claim 1, characterized in that, Two photoelectric detectors (13) are arranged at intervals along the first direction on the first clamping head (11).

6. The clamp-type signal generator according to any one of claims 1-5, characterized in that, The second working module (2) also includes: Two auxiliary push blocks (23) are rotatably connected to the two sides of the top block (22), and the auxiliary push blocks (23) are set in a one-to-one correspondence with the movable push block (12); The elastic reset mechanism is connected to the auxiliary push block (23), and the elastic reset mechanism always has the tendency to press the auxiliary push block (23) against the movable push block (12).

7. The clamp-type signal generator according to claim 6, characterized in that, The elastic reset mechanism includes: Mounting post (24) is disposed inside the second clamping head (21); The torsion spring (25) includes a first straight segment, a helical segment and a second straight segment connected in sequence. The helical segment is sleeved on the mounting post (24). The first straight segment and the second straight segment respectively abut against the corresponding auxiliary push block (23).

8. The clamp-type signal generator according to claim 6, characterized in that, The elastic reset mechanism includes: Two springs, one end of which is connected to the first clamping head (11), and the other end of which is connected to the corresponding auxiliary push block (23).

9. A method for monitoring low-loss leakage light in micro-bending optical fibers, characterized in that, Monitoring the optical fiber (3) under test using the clamp-on signal generator as described in any one of claims 1-8 includes the following steps: S1. Reduce the distance between the first clamping head (11) and the second clamping head (21) and clamp the optical fiber (3); S2. The loss disturbance mechanism simultaneously drives two movable push blocks (12) to gradually bend the corresponding two positions on the optical fiber (3); S3, the photoelectric detector (13) monitors the leakage power of the optical fiber (3) in real time up to a predetermined loss value; S4. Determine that the extension length of the loss disturbance mechanism at this time is the low-loss set extension length; S5. Control the loss disturbance mechanism to extend and bend the optical fiber (3) at a set frequency and a set extension length.

10. The method for monitoring low-loss leakage light in micro-bending optical fibers according to claim 9, characterized in that, It also includes the following steps: S6. When the optical fiber (3) is working normally, the loss disturbance mechanism will continue to extend and vibrate for a set time, and then wait for the detector downstream of the optical fiber (3) to identify it. S7. After the detector completes the identification, the loss disturbance mechanism resets and releases the optical fiber (3).

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