Sound sensing monitoring device

Abstract

The utility model discloses a sound sensing monitoring device, and relates to the technical field of sound monitoring. The sound sensing monitoring device is used for detecting a pipeline and comprises a distributed sound detection module, a sensing optical fiber, a first fixing module and a second fixing module. Wherein the sensing optical fiber is optically connected with the distributed sound detection module, and the sensing optical fiber is distributed along the axial direction of the pipeline; the first fixing module is arranged on the periphery of the pipeline; the sensing optical fiber is fixedly arranged on the second fixing module, the second fixing module is rotationally arranged on the first fixing module, so that the second fixing module can rotate relative to the pipeline, and the rotating axis of the second fixing module is perpendicular to the axis of the pipeline. According to the technical scheme provided by the utility model, the detection reliability of the sound sensing monitoring device is improved.

Description

Technical Field

[0001] This utility model relates to the field of sound monitoring technology, and in particular to a sound sensing monitoring device. Background Technology

[0002] Acoustic sensing technology is an important detection method. Acoustic sensing monitoring devices can use acoustic sensing technology to detect acoustic signals inside or around pipelines, so as to monitor problems such as pipeline leakage, corrosion, and structural integrity.

[0003] Traditional acoustic sensing monitoring devices mostly fix optical fibers directly to the surface of pipes using cable ties or clamps. This method cannot adapt to the dynamic changes in pipes and the external environment, and can easily damage the optical fibers, thus affecting the detection results. Utility Model Content

[0004] The main purpose of this invention is to provide an acoustic sensing monitoring device, which aims to improve the detection reliability of the acoustic sensing monitoring device.

[0005] To achieve the above objectives, the present invention proposes an acoustic sensing monitoring device for detecting pipelines, comprising:

[0006] Distributed sound detection module;

[0007] A sensing optical fiber is optically connected to the distributed acoustic detection module, and the sensing optical fiber is distributed along the axial direction of the pipe.

[0008] A first fixing module is disposed on the outer periphery of the pipe; and

[0009] The second fixed module is fixed to the sensing optical fiber and is rotatably mounted on the first fixed module, so that the second fixed module can rotate relative to the pipeline. The rotation axis of the second fixed module is perpendicular to the axis of the pipeline.

[0010] In one embodiment, the second fixing module includes:

[0011] The frame has a flexible limiting groove, and the sensing optical fiber is disposed in the flexible limiting groove; and

[0012] A rotating seat is located at the bottom of the frame and is rotatably connected to the first fixed module. The rotating seat is capable of rotating around its own axis, and the axis of the rotating seat is perpendicular to the axis of the pipe.

[0013] In one embodiment, the framework includes:

[0014] The base plate, wherein the flexible limiting groove is disposed on the base plate; and

[0015] A cover plate is detachably connected to the base plate to open or cover the opening of the flexible limiting groove.

[0016] In one embodiment, the first fixing module includes:

[0017] A clamping assembly includes two clamping portions, which are capable of moving closer to or further apart from each other to clamp or release the pipe; and

[0018] A fixed shaft is provided at the clamping part, the axis of the fixed shaft coincides with the axis of the rotating seat, and the rotating seat is rotatably sleeved on the outer periphery of the fixed shaft through a miniature bearing.

[0019] In one embodiment, the clamping part is provided with a positioning groove, the fixed shaft is provided in the positioning groove, the inner circumference of the positioning groove is provided with a first limiting plate, and the outer circumference of the rotating seat is provided with a second limiting plate. The first limiting plate is used to abut against the second limiting plate to limit the rotation stroke of the rotating seat.

[0020] In one embodiment, the clamping assembly further includes:

[0021] A buffer layer is provided on the side of the clamping part facing the pipe, and each clamping part is provided with a buffer layer; and

[0022] A stress-dispersing layer is disposed between the buffer layer and the clamping portion, and the stress-dispersing layer is configured as a mesh structure or a grid structure.

[0023] In one embodiment, the clamping assembly further includes:

[0024] Mounting plate;

[0025] Driven gears are rotatably mounted on the mounting plate, and each clamping part is rotatably connected to a driven gear, with two driven gears meshing together;

[0026] Linkage rods, rotatably mounted on the mounting plate, and each of the clamping portions is rotatably connected to at least one of the linkage rods; and

[0027] The driving gear is rotatably mounted on the mounting plate and meshes with one of the driven gears.

[0028] In one embodiment, the clamping assembly further includes:

[0029] The screw, the mounting plate having mounting holes, one end of the screw being rotatably disposed in the mounting holes and connected to the drive gear; and

[0030] A nut is fitted onto the outer circumference of the other end of the screw and screwed to the screw. The outer diameter of the nut is larger than the outer diameter of the mounting hole. The nut abuts against the outer wall of the mounting hole to lock the screw.

[0031] In one embodiment, the sensing fiber is configured as a single-mode fiber or a multi-core fiber.

[0032] In one embodiment, the distributed sound detection module includes:

[0033] Laser;

[0034] A pulse modulator, optically connected to the laser;

[0035] An optical amplifier, optically connected to the pulse modulator;

[0036] An optical circulator connects the optical amplifier to the sensing fiber.

[0037] A photodetector, optically connected to the optical circulator;

[0038] A processing unit is electrically connected to the photodetector, and the processing unit includes an adaptive filter;

[0039] The positioning unit is electrically connected to the processing unit and the pulse modulator; and

[0040] An alarm unit is electrically connected to the processing unit.

[0041] This invention provides a sound sensing monitoring device for detecting pipelines. The device comprises a distributed sound detection module, a sensing optical fiber, a first fixing module, and a second fixing module. The sensing optical fiber is optically connected to the distributed sound detection module and is distributed along the pipeline's axial direction. The first fixing module is located on the outer periphery of the pipeline. The sensing optical fiber is fixed to the second fixing module, which is rotatably mounted on the first fixing module, allowing the second fixing module to rotate relative to the pipeline. The rotation axis of the second fixing module is perpendicular to the pipeline's axis. Compared to existing sound sensing monitoring devices that directly fix the sensing optical fiber to the outer periphery of the pipeline, this invention uses a rotatably connected first and second fixing modules. The first fixing module confines the second fixing module to the outer periphery of the pipeline, while the second fixing module allows the sensing optical fiber to rotate relative to the pipeline. This enables the sensing optical fiber to adapt to dynamic changes in the pipeline and the external environment, preventing damage to the fiber and improving the detection reliability of the sound sensing monitoring device. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0043] Figure 1 A schematic diagram of the structure of an embodiment of the first fixing module and the second fixing module provided by this utility model;

[0044] Figure 2 for Figure 1 A schematic diagram of another embodiment;

[0045] Figure 3 for Figure 2 A partial exploded view of an embodiment at point A in the middle;

[0046] Figure 4 A cross-sectional view of an embodiment of the second fixing module and clamping part provided by this utility model;

[0047] Figure 5 This is a schematic diagram of an embodiment of the distributed acoustic detection module and sensing optical fiber provided by this utility model.

[0048] Explanation of icon numbers:

[0049] 110. Laser; 120. Pulse modulator; 130. Optical amplifier; 140. Optical circulator; 150. Photodetector; 160. Processing unit; 170. Positioning unit; 180. Alarm unit;

[0050] 200. Sensor fiber optic;

[0051] 300, First fixing module; 310, Mounting plate; 320, Fixing shaft; 330, Clamping part; 331, Positioning groove; 332, First limiting plate; 333, Buffer layer; 334, Stress dispersion layer; 340, Driven gear; 341, Extension rod; 350, Driving gear; 360, Connecting rod; 370, Screw; 380, Nut;

[0052] 400, Second fixing module; 410, Frame; 411, Base plate; 412, Cover plate; 420, Flexible limiting groove; 430, Rotating seat; 431, Second limiting plate;

[0053] 500, Pipeline;

[0054] 600. Fixture.

[0055] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0056] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0057] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0058] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0059] Acoustic sensing technology is an important detection method. Acoustic sensing monitoring devices can use acoustic sensing technology to detect acoustic signals inside or around pipelines, so as to monitor problems such as pipeline leakage, corrosion, and structural integrity.

[0060] Traditional acoustic sensing monitoring devices mostly fix optical fibers directly to the surface of pipes using cable ties or clamps. This method cannot adapt to the dynamic changes in pipes and the external environment, and can easily damage the optical fibers, thus affecting the detection results.

[0061] This invention proposes an acoustic sensing monitoring device to improve the detection reliability of the acoustic sensing monitoring device.

[0062] Please see Figure 1 and Figure 2In one embodiment, the acoustic sensing monitoring device includes a distributed acoustic detection module, a sensing optical fiber 200, a first fixing module 300, and a second fixing module 400. The sensing optical fiber 200 is optically connected to the distributed acoustic detection module and is distributed along the axial direction of the pipe 500. The first fixing module 300 is disposed on the outer periphery of the pipe 500. The sensing optical fiber 200 is fixed to the second fixing module 400, and the second fixing module 400 is rotatably disposed on the first fixing module 300, so that the second fixing module 400 can rotate relative to the pipe 500, and the rotation axis of the second fixing module 400 is perpendicular to the axis of the pipe 500.

[0063] The acoustic sensor monitoring device is used to detect pipeline 500. That is, the acoustic sensor monitoring device can detect whether there are abnormal problems such as leakage or damage in pipeline 500 based on the sound of the flow of liquid or gas in pipeline 500.

[0064] The distributed acoustic detection module provides optical signals to the sensing fiber optic cable 200 and detects the optical signals fed back by the sensing fiber optic cable 200. In one embodiment, one end of the sensing fiber optic cable 200 is connected to the distributed acoustic detection module via an optical fiber interface, and the other end of the sensing fiber optic cable 200 is distributed along the axial direction of the pipe 500 and located close to the outer wall of the pipe 500. The distributed acoustic detection module can emit optical signals and transmit them to the sensing fiber optic cable 200 via the optical fiber interface. When the sensing fiber optic cable 200 senses an acoustic signal, the acoustic signal causes a change in the phase or intensity of the optical signal in the sensing fiber optic cable 200. The changed optical signal returns along the sensing fiber optic cable 200 to the distributed acoustic detection module. The distributed acoustic detection module can determine whether there is an abnormal sound based on the optical signal fed back by the sensing fiber optic cable 200, and thus determine whether there is an abnormal problem in the pipe 500. In this way, by setting up the distributed acoustic detection module and the sensing fiber optic cable 200, the pipe 500 can be comprehensively detected, improving the detection range and accuracy of the acoustic sensing monitoring device.

[0065] The first fixing module 300 is used to restrict the second fixing module 400 to the outside of the pipe 500, and the second fixing module 400 is used to fix the sensing optical fiber 200 to the outside of the pipe 500. In one embodiment, the first fixing module 300 is detachably sleeved on the outer periphery of the pipe 500 so that the sensing optical fiber 200 is detachably disposed on the outer wall of the pipe 500. The second fixing module 400 is rotatably disposed on the side of the first fixing module 300 away from the pipe 500 and close to the outer wall of the pipe 500, so that the second fixing module 400 can rotate at a fixed point of the first fixing module 300. The rotation axis of the second fixing module 400 is perpendicular to the axis of the pipe 500, so that after the second fixing module 400 drives the sensing optical fiber 200 to rotate, only one end of the sensing optical fiber 200 is tilted at a certain angle relative to the pipe 500, rather than being completely away from the pipe 500. In this way, on the one hand, it ensures that the sensing fiber 200 is installed close to the outer wall of the pipe 500; on the other hand, the sensing fiber 200 automatically adjusts its position when the pipe 500 vibrates, shifts, or the external environment changes, thus avoiding damage to the sensing fiber 200 due to stretching or compression.

[0066] The technical solution of this utility model involves setting up a distributed acoustic detection module, a sensing optical fiber 200, a first fixed module 300, and a second fixed module 400 in an acoustic sensing monitoring device. The acoustic sensing monitoring device is used to detect a pipe 500. The sensing optical fiber 200 is optically connected to the distributed acoustic detection module and is distributed along the axial direction of the pipe 500. The first fixed module 300 is located on the outer periphery of the pipe 500. The sensing optical fiber 200 is fixed to the second fixed module 400, which is rotatably mounted on the first fixed module 300, allowing the second fixed module 400 to rotate relative to the pipe 500. The rotation axis of the second fixed module 400 is perpendicular to the axis of the pipe 500. Compared to existing acoustic sensing monitoring devices that directly fix the sensing fiber 200 to the outer periphery of the pipe 500, the technical solution of this utility model sets up a first fixing module 300 and a second fixing module 400 that are rotatably connected. The first fixing module 300 restricts the second fixing module 400 to the outer periphery of the pipe 500, and the second fixing module 400 can drive the sensing fiber 200 to rotate relative to the pipe 500, so that the sensing fiber 200 can adapt to the dynamic changes of the pipe 500 and the external environment, avoid damage to the sensing fiber 200, and improve the detection reliability of the acoustic sensing monitoring device.

[0067] Please see Figures 2 to 4In one embodiment, the second fixing module 400 includes a frame 410 and a rotating seat 430. The frame 410 is provided with a flexible limiting groove 420, and the sensing optical fiber 200 is disposed in the flexible limiting groove 420. The rotating seat 430 is disposed at the bottom of the frame 410 and is rotatably connected to the first fixing module 300. The rotating seat 430 rotates around its own axis, and the axis of the rotating seat 430 is perpendicular to the axis of the pipe 500.

[0068] In one embodiment, the frame 410 includes a base plate 411 and a cover plate 412. A flexible limiting groove 420 is disposed on the base plate 411, and the cover plate 412 is detachably connected to the base plate 411 to open or cover the opening of the flexible limiting groove 420.

[0069] In one embodiment, the rotating seat 430 is fixed to the bottom of the base plate 411, and the rotating seat 430 is rotatably disposed on the first fixing module 300 and never detaches from the first fixing module 300. In one embodiment, one end of the base plate 411 is fixedly connected to one end of the cover plate 412, and the other end of the base plate 411 is engaged with the other end of the cover plate 412. In one embodiment, one of the base plate 411 and the cover plate 412 is provided with a first protrusion facing the flexible limiting groove 420, and the other is provided with a second protrusion facing away from the flexible limiting groove 420. Both the first protrusion and the second protrusion are provided with inclined surfaces on the side facing each other, and both the first protrusion and the end of the second protrusion facing away from each other are provided with flat surfaces. The inclined surfaces are used to guide the second protrusion to move so that its flat surface abuts against the flat surface of the first protrusion. In one embodiment, the base plate 411 and the cover plate 412 are integrally formed, and the frame 410 is made of materials such as polypropylene (PP) or polycarbonate (PC), so that the frame 410 can generate slight deformation while providing support, thereby ensuring the snap-fit ​​connection between the base plate 411 and the cover plate 412. Of course, in other embodiments, the base plate 411 and the cover plate 412 can also be detachably connected by means of screws, etc. The base plate 411 and the cover plate 412 can also be made of materials such as polyamide (PA), polyvinyl chloride (PVC), or metal, etc., without limitation. In one embodiment, the flexible limiting groove 420 is configured as an arc-shaped structure to fit the outer surface of the sensing optical fiber 200. The sensing optical fiber 200 is snapped into the flexible limiting groove 420, and the cover plate 412 abuts against the sensing optical fiber 200 or the groove opening of the flexible limiting groove 420 to restrict the sensing optical fiber 200 within the flexible limiting groove 420. The flexible limiting groove 420 can be configured to be made of rubber or silicone, etc. The size and shape of the flexible limiting groove 420 can be flexibly set according to the size and shape of the sensing fiber 200 and the actual situation. There are no restrictions here.

[0070] The technical solution of this utility model embodiment is that by fixing the sensing optical fiber 200 to the frame 410, under the action of external force, the rotating seat 430 can drive the frame 410 to rotate around the axis of the rotating seat 430, thereby driving the sensing optical fiber 200 to rotate, so that the sensing optical fiber 200 can adapt to the dynamic changes of the pipeline 500 or the external environment, thus improving the adaptability of the acoustic sensing monitoring device.

[0071] Please see Figure 1 and Figure 3 In one embodiment, the first fixing module 300 includes a clamping assembly and a fixing shaft 320. The clamping assembly includes two clamping parts 330, which can move closer or further apart to clamp or release the pipe 500. The fixing shaft 320 is disposed on the clamping parts 330, and the axis of the fixing shaft 320 coincides with the axis of the rotating seat 430. The rotating seat 430 is rotatably sleeved on the outer periphery of the fixing shaft 320 through a miniature bearing.

[0072] In one embodiment, both clamping portions 330 have arc-shaped cross-sections to accommodate different shapes and sizes of the pipe 500, ensuring clamping stability. In another embodiment, the thickness of the two clamping portions 330 can be set between 2mm and 5mm to ensure structural strength while avoiding interference with the sensing fiber optic cable 200's detection of sound from the pipe 500. Of course, in other embodiments, the thickness of the clamping portions 330 can be flexibly set according to actual needs, and is not limited here. The material of the clamping portions 330 can be configured as aluminum alloy, stainless steel, or high-strength plastic, etc., and is not limited here.

[0073] In one embodiment, a fixed shaft 320 is disposed on the side of the clamping portion 330 opposite to the pipe 500. The inner circumference of the micro-motion bearing is sleeved and fixed to the outer circumference of the fixed shaft 320, and the inner wall of the rotating seat 430 is sleeved and fixed to the outer circumference of the micro-motion bearing. The outer circumference of the micro-motion bearing rotates relative to the inner circumference to realize the rotation of the rotating seat 430 relative to the fixed shaft 320. The axis of the fixed shaft 320 coincides with the axis of the rotating seat 430 to avoid eccentricity or wobbling during the rotation of the rotating seat 430, thus making the rotation of the rotating seat 430 more stable.

[0074] In one embodiment, the clamping part 330 is provided with a positioning groove 331, and the fixed shaft 320 is provided in the positioning groove 331. A first limiting plate 332 is provided on the inner periphery of the positioning groove 331, and a second limiting plate 431 is provided on the outer periphery of the rotating seat 430. The first limiting plate 332 is used to abut against the second limiting plate 431 to limit the rotation stroke of the rotating seat 430. In one embodiment, the positioning groove 331 is provided in one of the clamping parts 330 and is located on the side of the clamping part 330 away from the pipe 500. The cross-sectional shape of both the rotating seat 430 and the positioning groove 331 is circular. A gap is provided between the outer periphery of the rotating seat 430 and the inner periphery of the positioning groove 331 to accommodate the first limiting plate 332 and the second limiting plate 431. Of course, in other embodiments, the cross-sectional shape of the rotating seat 430 and the positioning groove 331 may also be circular and the other may be rectangular or elliptical, etc., which is not limited here. In one embodiment, two first limiting plates 332 and two second limiting plates 431 are provided. The two first limiting plates 332 are located on opposite sides of the rotating seat 430, and the two second limiting plates 431 are located on opposite sides of the positioning groove 331, so that the maximum rotation angle of the rotating seat 430 is 180°. Of course, in other embodiments, multiple first limiting plates 332 and one second limiting plate 431 may be provided respectively. The number of first limiting plates 332 and second limiting plates 431 can be set according to the actual required rotation angle of the rotating seat 430, and there is no limitation here.

[0075] The technical solution of this utility model embodiment, by setting the first limiting plate 332 and the second limiting plate 431, can limit the rotation angle of the rotating seat 430, avoid damage to the sensing fiber optic cable 200 due to excessive rotation angle, and further improve the reliability of the acoustic sensing monitoring device.

[0076] Please see Figure 4 In one embodiment, the clamping assembly further includes a buffer layer 333 and a stress dispersion layer 334. The buffer layer 333 is disposed on the side of the clamping part 330 facing the pipe 500, and each clamping part 330 is provided with a buffer layer 333. The stress dispersion layer 334 is disposed between the buffer layer 333 and the clamping part 330, and the stress dispersion layer 334 is configured as a mesh structure or a grid structure.

[0077] In one embodiment, the stress-dispersing layer 334 and the buffer layer 333 are sequentially attached to the side of the clamping part 330 facing the pipe 500, with the buffer layer 333 in direct contact with the outer wall of the pipe 500. The buffer layer 333 can be configured as a material with good impact resistance, such as rubber, silicone, or polyurethane foam, and its shape is adapted to the shape of the clamping part 330; no limitation is imposed here. In one embodiment, the stress-dispersing layer 334 can be configured as a mesh structure such as a metal wire mesh or nylon mesh. In another embodiment, the stress-dispersing layer 334 can also be configured as a grid structure such as a carbon fiber grid or a glass fiber grid. In one embodiment, the thickness of the buffer layer 333 is between 0.5 mm and 2 mm, and the thickness of the stress-dispersing layer 334 is also between 0.5 mm and 2 mm, to avoid excessive thickness affecting the detection of the sensing fiber 200 and excessive thinness rendering it ineffective. Of course, in other embodiments, the thickness of the buffer layer 333 and the stress-dispersing layer 334 can be flexibly set according to actual needs; no limitation is imposed here. The stress dispersion layer 334 and the buffer layer 333 can be sequentially attached to the clamping part 330 by means of bonding, snapping or embedding, etc., and there is no limitation on this.

[0078] The technical solution of this utility model embodiment, by setting a buffer layer 333, can effectively absorb the pressure generated during clamping, preventing scratches or deformation on the surface of the pipe 500 due to clamping; on the other hand, the elasticity of the buffer layer 333 can adapt to the irregular shape of the pipe 500 surface, ensuring the stability and reliability of clamping. By setting a stress dispersion layer 334, on the one hand, the force applied to the pipe 500 by the clamping part 330 can be dispersed, reducing local stress concentration, thereby reducing the risk of damage to the clamping part 330 due to stress concentration; on the other hand, the stress dispersion layer 334 can absorb and disperse mechanical vibration and noise in the external environment, reducing the impact of external noise on the sound of the pipe 500 detected by the sensing fiber optic 200.

[0079] Please see Figure 1 and Figure 2 In one embodiment, the clamping assembly further includes a mounting plate 310, a driven gear 340, a connecting rod 360, and a driving gear 350. The driven gear 340 is rotatably mounted on the mounting plate 310, and each clamping part 330 is rotatably connected to one driven gear 340, with two driven gears 340 meshing with each other; the connecting rod 360 is rotatably mounted on the mounting plate 310, and each clamping part 330 is rotatably connected to at least one connecting rod 360; the driving gear 350 is rotatably mounted on the mounting plate 310 and meshes with one of the driven gears 340.

[0080] In one embodiment, the acoustic sensing monitoring device further includes a mounting frame 600, a mounting plate 310 disposed within the mounting frame 600 and fixed at one end thereto, and a clamping part 330 located at the other end of the mounting plate 310. In one embodiment, both the driven gear 340 and the driving gear 350 are rotatably disposed on the same side of the mounting plate 310, and each driven gear 340 is provided with an extension rod 341. One side of each clamping part 330 is rotatably connected to an extension rod 341 and a connecting rod 360, and the other side of each clamping part 330 is rotatably connected to two other parallel connecting rods 360. The extension rod 341 is parallel to all the connecting rods 360. The rotation of the driving gear 350 drives one driven gear 340 to rotate, and simultaneously drives the other driven gear 340 to rotate. The connecting rods 360 rotate synchronously, causing the two clamping parts 330 to move closer or further apart to clamp or release the pipe 500.

[0081] Please see Figure 1 and Figure 2 In one embodiment, the clamping assembly further includes a screw 370 and a nut 380. The mounting plate 310 is provided with a mounting hole. One end of the screw 370 is rotatably disposed in the mounting hole and connected to the drive gear 350. The nut 380 is sleeved on the outer periphery of the other end of the screw 370 and screwed to the screw 370. The outer diameter of the nut 380 is larger than the outer diameter of the mounting hole. The nut 380 abuts against the outer wall of the mounting hole to lock the screw 370.

[0082] In one embodiment, the axis of the mounting hole coincides with the axis of the drive gear 350. The screw 370 passes through the mounting hole to be fixedly connected to the axial position of the drive gear 350, and the screw 370 is rotatably connected to the mounting hole. In one embodiment, the outer periphery of the screw 370 is provided with a protrusion, and the inner wall of the mounting hole is provided with a groove. The protrusion is slidably disposed in the groove to realize the rotatable connection between the screw 370 and the mounting hole. Of course, in other embodiments, a groove may be provided in the screw 370 and a protrusion may be provided in the mounting hole; or the screw 370 may also be rotatably connected to the mounting hole through a bearing. Here, no limitation is made. In one embodiment, the nut 380 can rotate along the screw 370 to approach or move away from the mounting hole. The outer diameter of the nut 380 is larger than the outer diameter of the mounting hole to ensure that the nut 380 can abut against the mounting hole to restrict the rotation of the screw 370, thereby realizing the fixation of the clamping part 330. Furthermore, in one embodiment, an anti-slip pad is provided on the outer wall of the mounting hole or on the side of the nut 380 facing the mounting hole to increase the friction between the nut 380 and the outer wall of the mounting hole. Of course, in other embodiments, the outer wall of the mounting hole or the side of the nut 380 facing the mounting hole may be roughened, etc., and this is not a limitation.

[0083] The technical solution of this utility model embodiment, by setting a driven gear 340, a driving gear 350, and a connecting rod 360, can drive the two clamping parts 330 to move closer or further apart, improving the flexibility of the first fixing module 300. Furthermore, the structure is simple and easy to operate. By setting a screw 370 and a nut 380, the driving gear 350 can be locked, thereby fixing the position of the clamping parts 330 and improving reliability.

[0084] In one embodiment, the sensing fiber 200 is configured as a single-mode fiber or a multi-core fiber.

[0085] Single-mode optical fiber has a smaller core diameter and is mainly used to transmit single-mode optical signals. It has strong anti-interference capabilities and can achieve high-precision, long-distance optical signal transmission. Multi-core optical fiber integrates multiple cores, meaning it has multiple independent transmission channels, enabling sound detection at multiple locations. Specifically, when the sensing fiber 200 is configured as a single-mode fiber, it can more accurately monitor abnormal sounds within the pipe 500. The type of sensing fiber 200 can be set according to actual conditions; no specific restrictions are imposed here.

[0086] Please see Figure 5 In one embodiment, the distributed sound detection module includes a laser 110, a pulse modulator 120, an optical amplifier 130, an optical circulator 140, a photodetector 150, a processing unit 160, a positioning unit 170, and an alarm unit 180. The pulse modulator 120 is optically connected to the laser 110; the optical amplifier 130 is optically connected to the pulse modulator 120; the optical circulator 140 is optically connected to the optical amplifier 130 and the sensing fiber optic cable 200; the photodetector 150 is optically connected to the optical circulator 140; the processing unit 160 is electrically connected to the photodetector 150, and the processing unit 160 includes an adaptive filter; the positioning unit 170 is electrically connected to the processing unit 160 and the pulse modulator 120; and the alarm unit 180 is electrically connected to the processing unit 160.

[0087] Laser 110 emits a continuous optical signal; pulse modulator 120 modulates the continuous optical signal into a pulsed optical signal for subsequent optical signal processing; optical amplifier 130 amplifies the pulsed optical signal to ensure sufficient power; optical circulator 140 couples the amplified pulsed optical signal into sensing fiber 200. The optical signal propagates in sensing fiber 200. When acoustic signals are present around or inside the pipe 500, the optical signal changes and returns along sensing fiber 200 to optical circulator 140. Optical circulator 140 guides the returned optical signal to photodetector 150, which converts the returned optical signal into an electrical signal for transmission to processing unit 160.

[0088] In one embodiment, the processing unit 160 further includes a signal processor and a microcontroller. An adaptive filter receives electrical signals and removes noise signals to extract useful acoustic signal features. The signal processor further processes and analyzes the extracted acoustic signals and transmits the processing results to the microcontroller. In one embodiment, a time delay measurement module is used. The positioning unit 170 can acquire the transmission and return times of the pulsed light signal to determine the location of the sound source by measuring the time delay of the returned light signal. The functionality of the positioning unit 170 is mainly implemented through a logic algorithm, which is not limited here. In one embodiment, the alarm unit 180 includes an audible and visual alarm and a communication module to communicate with a monitoring center or mobile terminal. When the signal processing unit 160 determines that an abnormal signal exists, the microcontroller controls the alarm module to issue an alarm and transmit the alarm information to the monitoring center or mobile terminal, etc.

[0089] The technical solution of this utility model embodiment, by setting up the distributed sound detection module and the sensing fiber optic cable 200, can achieve high-precision sound detection. By setting up an adaptive filter, the detection accuracy of the sound sensing monitoring device can be further improved. By setting up the positioning unit 170, abnormal sound sources can be located, thereby improving the detection reliability of the sound sensing monitoring device.

[0090] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. An acoustic sensing monitoring device for detecting pipelines, characterized in that, include: Distributed sound detection module; A sensing optical fiber is optically connected to the distributed acoustic detection module, and the sensing optical fiber is distributed along the axial direction of the pipe. The first fixing module is located on the outer periphery of the pipe; as well as The second fixed module is fixed to the sensing optical fiber and is rotatably mounted on the first fixed module, so that the second fixed module can rotate relative to the pipeline. The rotation axis of the second fixed module is perpendicular to the axis of the pipeline.

2. The acoustic sensing monitoring device as described in claim 1, characterized in that, The second fixing module includes: The frame has a flexible limiting groove, and the sensing optical fiber is disposed in the flexible limiting groove; and A rotating seat is located at the bottom of the frame and is rotatably connected to the first fixed module. The rotating seat is capable of rotating around its own axis, and the axis of the rotating seat is perpendicular to the axis of the pipe.

3. The acoustic sensing monitoring device as described in claim 2, characterized in that, The framework includes: The base plate, wherein the flexible limiting groove is disposed on the base plate; and A cover plate is detachably connected to the base plate to open or cover the opening of the flexible limiting groove.

4. The acoustic sensing monitoring device as described in claim 2, characterized in that, The first fixed module includes: A clamping assembly includes two clamping portions, which are capable of moving closer to or further apart from each other to clamp or release the pipe; and A fixed shaft is provided at the clamping part, the axis of the fixed shaft coincides with the axis of the rotating seat, and the rotating seat is rotatably sleeved on the outer periphery of the fixed shaft through a miniature bearing.

5. The acoustic sensing monitoring device as described in claim 4, characterized in that, The clamping part is provided with a positioning groove, the fixed shaft is provided in the positioning groove, the inner circumference of the positioning groove is provided with a first limiting plate, and the outer circumference of the rotating seat is provided with a second limiting plate. The first limiting plate is used to abut against the second limiting plate to limit the rotation stroke of the rotating seat.

6. The acoustic sensing monitoring device as described in claim 4, characterized in that, The clamping assembly further includes: A buffer layer is provided on the side of the clamping part facing the pipe, and each clamping part is provided with a buffer layer; and A stress-dispersing layer is disposed between the buffer layer and the clamping portion, and the stress-dispersing layer is configured as a mesh structure or a grid structure.

7. The acoustic sensing monitoring device as described in claim 4, characterized in that, The clamping assembly further includes: Mounting plate; Driven gears are rotatably mounted on the mounting plate, and each clamping part is rotatably connected to a driven gear, with two driven gears meshing together; Linkage rods, rotatably mounted on the mounting plate, and each of the clamping portions is rotatably connected to at least one of the linkage rods; and The driving gear is rotatably mounted on the mounting plate and meshes with one of the driven gears.

8. The acoustic sensing monitoring device as described in claim 7, characterized in that, The clamping assembly further includes: The screw, the mounting plate having mounting holes, one end of the screw being rotatably disposed in the mounting holes and connected to the drive gear; and A nut is fitted onto the outer circumference of the other end of the screw and screwed to the screw. The outer diameter of the nut is larger than the outer diameter of the mounting hole. The nut abuts against the outer wall of the mounting hole to lock the screw.

9. The acoustic sensing monitoring device as described in claim 1, characterized in that, The sensing fiber is configured as a single-mode fiber or a multi-core fiber.

10. The acoustic sensing monitoring device as described in claim 1, characterized in that, The distributed sound detection module includes: Laser; A pulse modulator, optically connected to the laser; An optical amplifier, optically connected to the pulse modulator; An optical circulator connects the optical amplifier to the sensing fiber. A photodetector, optically connected to the optical circulator; A processing unit is electrically connected to the photodetector, and the processing unit includes an adaptive filter; The positioning unit is electrically connected to the processing unit and the pulse modulator; and An alarm unit is electrically connected to the processing unit.

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