CN219977335U

CN219977335U - Optical fiber roof separation layer sensor

Info

Publication number: CN219977335U
Application number: CN202321276844.XU
Authority: CN
Inventors: 王宝岗
Original assignee: Shandong Huiying Photoelectric Technology Co ltd
Current assignee: Shandong Huiying Photoelectric Technology Co ltd
Priority date: 2023-05-23
Filing date: 2023-05-23
Publication date: 2023-11-07
Anticipated expiration: 2033-05-23

Abstract

The utility model belongs to the technical field of underground safety, and relates to an optical fiber roof separation sensor, wherein an optical fiber grating is arranged on an optical fiber sensing module, a winding module is abutted against an input shaft of a gear transmission module, an output shaft of the gear transmission module is respectively abutted against a display module and the optical fiber sensing module, the winding module receives a roof separation value through a steel wire rope and converts the roof separation value into rotary displacement, the gear transmission module converts the rotary displacement into a rotation number through a gear assembly and transmits the rotation number to the display module and the optical fiber sensing module, the display module converts the rotation number into a roof separation value for field display, the optical fiber sensing module converts the rotation number into an optical fiber grating central wavelength value and transmits the optical fiber grating central wavelength value to a remote monitoring device through an optical fiber network, and the remote monitoring device converts the optical fiber grating central wavelength value into the roof separation value to realize remote monitoring. The utility model has more visual field display and can ensure synchronous field and remote display.

Description

Optical fiber roof separation layer sensor

Technical Field

The utility model belongs to the technical field of underground safety, and particularly relates to an optical fiber roof separation sensor which can realize mine field digital display and remote monitoring of roof separation values.

Background

During the exploitation of mines such as coal mines, accidents such as sinking of a mining field and roof caving and the like often occur due to artificial or natural reasons along with the time, and the safety production of the mines and the life safety of personnel are seriously affected. The roof separation sensor can monitor and display the separation state (roof separation value) of the roof in real time, accordingly, early warning is carried out in advance, corresponding actions are taken, accordingly, roadway collapse accidents are effectively predicted, personnel and equipment are prevented from being damaged, and the safety of mining activities is greatly improved.

The traditional mechanical roof separation sensor consists of flukes, an anchoring pipe and a display device, wherein when a roof is separated from the water, the flukes anchored in the roof drive the display device to display the numerical value of the roof separation in real time through scales. The main problem of this equipment is that it is not possible to monitor remotely, and because of the small scale, the underground staff cannot find clearly the change of the roof separation value in time.

In addition, the structure of the electronic roof separation layer sensor is relatively complex, and the working mode is as follows: when the roof is in separation layer activity, the fluke anchored in the drill hole drives the potentiometer in the sensor box body to rotate through the steel wire rope, and the change of the resistance is converted into the roof separation layer value to be displayed. Because the sensing mode has poor detection precision and anti-interference capability, the sensing mode is generally only used for on-site display, and because of the characteristics of an electric signal medium, the sensing mode has a certain influence on the safety of the roof separation sensor during maintenance and disassembly and replacement.

The existing products have similar products with field display functions, but most of the existing products are displayed in a pointer type or scale type. The field personnel can make wrong judgement to the separation layer numerical value because of the difference of observation angle, and simultaneously, roof separation layer sensor internal transmission structure is comparatively complicated, and the integrated level is lower, and this all can produce inconvenience to the equipment debugging of roof separation layer sensor.

Disclosure of Invention

The utility model mainly aims to solve the problem of high-efficiency and accurate monitoring of the roof separation value so as to ensure the production of mines and the safety of underground personnel, and the utility model is required to realize remote monitoring and simultaneously ensure the visual display of the roof separation value on site so as to provide timely and effective early warning for underground constructors. Meanwhile, the utility model has the advantages of relatively simple internal structure, high integration level of the transmission part and convenient disassembly and assembly, and is intrinsically safe due to the fact that the transmission medium takes optical signals as information, and is safer and more convenient in assembly production and later disassembly and maintenance. The technical scheme adopted by the utility model is as follows:

the utility model provides an optic fibre roof separation layer sensor, includes wire winding module, gear drive module, display module and optic fibre sensing module, the fixed fiber bragg grating that is provided with on the optic fibre sensing module, wire winding module butt gear drive module's input shaft, gear drive module's output shaft butt display module and optic fibre sensing module respectively, wire winding module receive roof separation layer value through wire rope to with roof separation layer value conversion rotary displacement, gear drive module pass through gear assembly and convert rotary displacement into the number of rotations, and transmit display module and optic fibre sensing module with the number of rotations, display module converts the number of rotations into roof separation layer value on-site display, optic fibre sensing module converts the number of rotations into fiber bragg grating central wavelength value, and transmits fiber bragg grating central wavelength value to remote monitoring device through fiber network, remote monitoring device converts fiber bragg grating central wavelength value into roof separation layer value and realizes remote monitoring.

Preferably, the gear transmission module comprises a pair of symmetrically arranged gear assemblies with the same structure, the gear assemblies comprise gear assembly bodies, gear sets are fixedly arranged in the gear assembly bodies, and each gear set comprises a three-stage gear reduction mechanism and a single-stage gear reduction mechanism.

Preferably, one side surface of the gear assembly body is rotatably provided with a gear set input shaft, the other opposite side surface of the gear assembly body is rotatably provided with a screw shaft and a gear set output shaft, the gear set input shaft and the gear set output shaft are rotatably connected through a three-stage gear reduction mechanism, and the gear set input shaft and the screw shaft are rotatably connected through a single-stage gear reduction mechanism.

Preferably, the optical fiber sensing module includes: the special-shaped nut, the cylindric lock, equal-strength cantilever beam, cantilever Liang Yakuai, cantilever beam installation piece and fiber bragg grating, cylindric lock fixed mounting is on the gear assembly body directly over the screw shaft, the special-shaped nut rotates to be installed on the screw shaft, spacing through-hole is seted up to one of them angle of special-shaped nut, the cylindric lock passes the spacing through-hole of special-shaped nut, cantilever beam installation piece fixed mounting is on the gear assembly body of special-shaped nut below, equal-strength cantilever beam passes through cantilever Liang Yakuai fixed mounting on the cantilever beam installation piece, fiber bragg grating pastes on equal-strength cantilever beam.

Preferably, the special-shaped nut is of a cross-shaped four-corner structure, the side lengths and the widths of the two ends of the equal-strength cantilever beam are different, one end of the wide side length of the equal-strength cantilever beam is fixedly arranged on the cantilever beam mounting block, and one end of the narrow side length of the equal-strength cantilever beam is in butt joint with one corner of the special-shaped nut.

Preferably, the winding module includes: the automatic reset winding machine comprises a main mounting plate, a winding spring assembly and an automatic reset winding wheel, wherein the winding spring assembly mounting plate is fixedly mounted on the main mounting plate, the winding spring assembly is fixedly mounted on the winding spring assembly mounting plate, the winding wheel is rotatably mounted on the winding spring assembly, and the end part of the winding wheel, which is far away from the winding spring assembly, is rotatably connected with an input shaft of the gear set through an elastic coupler and a jackscrew.

Preferably, the main mounting plate and the coil spring assembly mounting plate are of a right-side opening square-shaped structure formed by integrally forming an upper mounting plate, a lower mounting plate and a side mounting plate.

Preferably, the display module adopts a mechanical counter with three-position display, and the output shaft of the gear set is rotationally connected with the mechanical counter through an elastic coupling and a jackscrew.

Preferably, the shell of the optical fiber roof separation layer sensor comprises a top cover, a front cover and a rear cover, wherein a mounting through hole is formed in the position, corresponding to the circular through hole of the main mounting plate, of the top cover, a mounting rod connecting piece is fixedly mounted, the mounting rod assembly is fixedly connected with the mounting rod connecting piece through a jackscrew to form a whole, a steel wire rope penetrates through the mounting rod assembly to be fixedly connected to a steel wire rope connecting block, one side of the mechanical counter is fixed on the front cover, and the mechanical counter is obliquely arranged at an angle of 45 degrees downwards.

Preferably, the installation rod connecting piece is of a hollow cylinder structure, the installation rod assembly comprises a section of steel pipe and a plurality of flukes penetrating through the steel pipe, the flukes are formed by bending steel wires, and the flukes are fixedly connected with the steel wire rope connecting block through steel wire ropes.

The utility model has the beneficial effects that:

1. the on-site display is more visual, the synchronous display of the on-site and remote can be ensured, and the method has the characteristic of intrinsic safety.

2. The internal structure is distinguished according to the module, the integration level of the system is high, the system can work through simple connection, and the disassembly, the assembly and the maintenance are convenient.

3. The transmission and the grating sensing component are independently arranged in one cavity, so that the purpose of dust prevention and water prevention can be realized, and the rear cover which can be independently opened is convenient for the installation and the disassembly of the sensor.

4. The mounting rod and the sensor body are connected in a convenient-to-detach mode, so that the on-site dismounting is convenient, the repeated utilization rate of the sensor can be greatly improved, and the production cost can be effectively reduced on the premise of ensuring the underground safety.

Drawings

FIG. 1 is a schematic illustration of the structure of a gear assembly according to an embodiment of the present utility model;

FIG. 2 is a schematic illustration of a gear assembly according to an embodiment of the present utility model;

FIG. 3 is a schematic perspective view of a winding module and display module assembly according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram showing a second perspective view of a winding module and display module assembly according to an embodiment of the present utility model;

FIG. 5 is a schematic perspective view of an optical fiber roof separation sensor according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram showing a second perspective view of an optical fiber roof separation sensor according to an embodiment of the present utility model;

FIG. 7 is a cross-sectional view of a mounting rod attachment member according to an embodiment of the present utility model;

fig. 8 is a schematic structural view of a mounting bar assembly according to an embodiment of the present utility model.

In the figure, 1 a gear set input shaft, 2 a screw shaft, 3 a gear set output shaft, 4 a profiled nut, 5 a cylindrical pin, 6 a constant-strength cantilever beam, 7 a cantilever Liang Yakuai, 8 a cantilever beam mounting block, 9 a mechanical counter, 10 a resilient coupling, 11 a main mounting plate, 12 a coil spring assembly mounting plate, 13 a coil spring assembly, 14 a reel, 15 a front cover, 16 a mounting rod assembly, 17 a mounting rod connector, 18 a top cover, 19 a rear cover, 20 a wire rope connection block, 21 a fluke, 22 a steel pipe.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and complete in conjunction with the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the present utility model.

The utility model provides a novel optical fiber roof separation layer sensor for on-site digital display and remote monitoring, which comprises a gear transmission module, an optical fiber sensing module, a winding module and a display module. Meanwhile, a mounting rod module, a wire rope transmission assembly and a metal shell which relate to mounting and protection are also included.

The core component of the utility model is a gear transmission module, and the gear transmission module comprises a pair of gear components which are symmetrically arranged and have the same structure, as shown in figure 1, and is a structural schematic diagram of the gear component in the embodiment of the utility model; FIG. 2 is a schematic diagram of a gear assembly according to an embodiment of the present utility model. The gear assembly comprises a gear assembly body with a rectangular box body structure, wherein a gear set is fixedly arranged in the gear assembly body and comprises a three-stage gear reduction mechanism and a single-stage gear reduction mechanism. One side of the gear assembly body is rotatably provided with a gear set input shaft 1, the gear set input shaft 1 drives a three-stage gear reduction mechanism and a single-stage gear reduction mechanism to rotate, the other opposite side of the gear assembly body is rotatably provided with a screw shaft 2 and a gear set output shaft 3, the three-stage gear reduction mechanism drives the gear set output shaft 3 to rotate, the single-stage gear reduction mechanism drives the screw shaft 2 to rotate, and the purpose of the single-stage gear reduction mechanism is to convert a change value of a roof separation layer into the number of rotation turns of the corresponding screw shaft 2 and the gear set output shaft 3.

The transmission ratio of the gear set input shaft 1 to the screw rod shaft 2 is required to be determined according to the structural size of the constant-strength cantilever beam 6; the gear ratio of the gearset input shaft 1 to the gearset output shaft 3 needs to be determined according to the diameter of the reel 14 and the speed ratio of the mechanical counter 9. Because the stress is smaller, the gear sets are all realized by adopting common cylindrical spur gears. After knowing the purpose of the transmission of the gear assembly, a person skilled in the art can realize speed ratio matching according to the actual situation of the parts thereof, and the speed ratio matching method is the prior art and is not repeated here.

The optical fiber sensing module includes: the special-shaped nut 4, the cylindrical pin 5, the equal-strength cantilever beam 6, the cantilever Liang Yakuai, the cantilever beam mounting block 8 and the fiber grating. The cylindric lock 5 fixed mounting is on the gear assembly body directly over the screw shaft 2, and dysmorphism nut 4 is cross four corners structure, and dysmorphism nut 4 rotates to be installed on the screw shaft 2, and spacing through-hole is seted up to one of them corner of dysmorphism nut 4, and cylindric lock 5 passes spacing through-hole of dysmorphism nut 4, and displacement change around dysmorphism nut 4 realizes under the rotary motion of screw shaft 2, and the spacing effect of cylindric lock 5 makes dysmorphism nut 4 can not take place to rotate. The cantilever beam mounting block 8 is fixedly mounted on the gear assembly body below the special-shaped nut 4, the equal-strength cantilever beam 6 is fixedly mounted on the cantilever beam mounting block 8 through the cantilever Liang Yakuai 7, the side length and the width of two ends of the equal-strength cantilever beam 6 are different, the wide-side long one end of the equal-strength cantilever beam 6 is fixedly mounted on the cantilever beam mounting block 8, one end of the narrow side length of the equal-strength cantilever beam 6 is abutted to one corner of the special-shaped nut 4, and the fiber bragg grating is stuck on the equal-strength cantilever beam 6. One end of the equal-strength cantilever beam 6 with a narrow side is abutted against the inner side surface of the special-shaped nut 4 on one gear assembly (the left gear assembly in fig. 2), and the other end of the equal-strength cantilever beam 6 with a narrow side is abutted against the outer side surface of the special-shaped nut 4 on the other gear assembly (the right gear assembly in fig. 2). When the special-shaped nut 4 is subjected to front-back displacement change, the free end (one end with a narrow side length) of the equal-strength cantilever beam 6 is pushed to move back and forth, so that the flexural deformation of the equal-strength cantilever beam 6 is realized, and further, the linear change of the center wavelength of the fiber grating is accurately realized. The cantilever beam mounting block 8 is fastened on the gear assembly body through two bolts, the bolts penetrate through the cantilever Liang Yakuai 7 and the equal-strength cantilever beam 6 at the same time and then are connected to the cantilever beam mounting block 8, and after the bolts are screwed, the cantilever Liang Yakuai 7 is tightly pressed on the equal-strength cantilever beam 6, so that the stress area is increased. The optical fiber sensing module transmits the central wavelength value of the optical fiber grating to the remote monitoring device through the optical fiber network, the remote monitoring device converts the central wavelength value of the optical fiber grating into a roof separation layer value to realize remote monitoring, and the remote monitoring device can adopt a server or a computer.

Because there are two monitored values for each delamination sensor: the separation layer variation of the deep base point and the shallow base point requires two sets of transmission components to realize the sensing function. The change of the central wavelength of the fiber bragg grating is transmitted to a remote host through optical fibers, is converted and processed through a photoelectric device, and is displayed on a screen through upper computer software, and the technical content is the prior art and is not included in the utility model, so that the utility model is not described.

The profiled nut 4 is symmetrical in the front-rear and left-right directions, so that there is no distinction between the different sides thereof. However, due to the fixed rotation direction of the mechanical counter 9, all input and output shafts of the two sets of gear assemblies rotate in opposite directions, so that the movement directions of the two special-shaped nuts 4 are opposite, and therefore, the two equal-strength cantilever beams 6 need to abut against different sides of the special-shaped nuts 4 to achieve the purpose of bending.

FIG. 3 is a schematic perspective view of a winding module and display module assembly according to an embodiment of the present utility model; fig. 4 is a schematic diagram showing a three-dimensional structure of a winding module and a display module assembly according to an embodiment of the utility model. The winding module comprises: a main mounting plate 11, a coil spring assembly mounting plate 12, a coil spring assembly 13, and an automatically resettable reel 14. The main mounting plate 11 and the coil spring assembly mounting plate 12 are of a right-side opening 'mouth' -shaped structure formed by integrally forming an upper mounting plate, a lower mounting plate and a side mounting plate, the coil spring assembly mounting plate 12 is fixedly mounted on the side mounting plate of the main mounting plate 11, the main mounting plate 11 and the coil spring assembly mounting plate 12 form a space for fixedly mounting the coil spring assembly 13, the coil spring assembly 13 is fixedly mounted on the inner side surface of the side mounting plate of the coil spring assembly mounting plate 12, the reel 14 is rotatably mounted on the coil spring assembly 13, and the gear transmission module is fixedly mounted on the outer side surface of the side mounting plate of the main mounting plate 11. The upper mounting plate of the main mounting plate 11 is provided with a circular through hole through which the steel wire rope passes. When the wire rope with the wire diameter of 0.6mm is wound on the reel 14, and when the wire rope is pulled outwards to cause the reel 14 to rotate, the coil spring inside the coil spring assembly 13 connected with the wire rope also rotates, so that the coil spring inside the coil spring assembly 13 is continuously compressed, and if the traction tension of the wire rope is lost, the reel 14 can be quickly and automatically reset under the action of the restoring force of the coil spring assembly 13, and then the gear set is driven to return to the initial position. The end of the reel 14 remote from the wrap spring assembly 13 is rotatably connected to the gearset input shaft 1 by means of an elastic coupling 10 and a jackscrew (not shown for reasons of shielding) and the reel 14 is rotated to drive the gearset input shaft 1 in rotation.

The gear assembly is fixedly connected to the outer side face of the main mounting plate 11 through bolts, the main mounting plate 11 is connected with the coil spring assembly mounting plate 12 through bolts, and the coil spring assembly 13 is connected with the coil spring assembly mounting plate 12 through bolts. Two steel wires are respectively wound on the two reels 14, two flukes 21 are respectively connected through steel wire rope connecting blocks 20, and the two flukes 21 are respectively used for measuring two foundation points of depth.

The display module adopts a three-position displayed mechanical counter 9, and the mechanical counter 9 has a manual reset function. The gear set output shaft 3 of the gear assembly is rotationally connected with the mechanical counter 9 through an elastic coupler 10 and a jackscrew, and the purpose that the display numerical value of the mechanical counter 9 is the same as the roof separation value is realized through proper speed ratio matching of the gear assembly. The jackscrew is a part on the elastic coupling 10 that is used to fix the shaft ends penetrating into the holes at both ends for transmission, and is therefore not shown in the figures.

FIG. 5 is a schematic perspective view of an optical fiber roof separation sensor according to an embodiment of the present utility model; fig. 6 is a schematic diagram showing a perspective structure of an optical fiber roof separation sensor according to an embodiment of the utility model. The shell of the optical fiber roof separation layer sensor adopts a metal shell, and a closed cavity is formed by a top cover 18, a front cover 15 and a rear cover 19. The top cover 18 is provided with a mounting through hole at a position corresponding to the circular through hole of the main mounting plate 11 and is fixedly provided with a mounting rod connecting piece 17, and the mounting rod assembly 16 is fixedly connected with the mounting rod connecting piece 17 into a whole through jackscrews. The wire rope wound around the reel 14 is fixedly connected to the wire rope connection block 20 through the installation bar assembly 16, and the plurality of flukes 21 are fixedly connected to the wire rope connection block 20 through the wire ropes, respectively. One side of the mechanical counter 9 is welded and fixed on the front cover 15 through a welding plate, and a through hole is reserved on the front cover 15 for manually zeroing the mechanical counter 9. The mechanical counter 9 is obliquely arranged at 45 degrees downwards, so that underground staff can conveniently read the numerical values, and further the functions of remote sensing and on-site display of the separation layer value of the optical fiber top plate through the optical fiber grating are efficiently realized. The top cover 18, the front cover 15 and the rear cover 19 are connected by bolts.

As shown in fig. 7, a cross-sectional view of a mounting rod attachment member according to an embodiment of the present utility model is shown. The installation pole connecting piece 17 is a hollow cylinder structure in the interior, the interior is a hollow structure with two sections of different diameters (the diameter of the hollow structure in the upper part is smaller than that of the hollow structure in the lower part), the lower end part of the installation pole assembly 16 is inserted into the upper part of the installation pole connecting piece 17 and then is propped up tightly through jackscrews, and the lower part of the installation pole connecting piece 17 passes through the top cover 18 and the reserved hole of the main installation plate 11 and is then screwed up and fixedly connected together through M24 hexagonal thin nuts.

Fig. 8 is a schematic view of the structure of the mounting bar assembly according to the embodiment of the present utility model. The mounting bar assembly 16 includes a length of steel tubing 22 and three sets of flukes 21 extending through the tubing 22, the flukes 21 being formed from bent steel wire.

The optical fiber roof separation layer sensor of the embodiment of the utility model comprises the following steps of: firstly, a wire rope with a wire diameter of 0.6mm and a length of one meter is wound on a reel 14, the mechanical counter 9 and the special-shaped nut 4 are reset to zero, the initial position of the special-shaped nut 4 is ensured to generate slight pre-deformation of the equal-strength cantilever beam 6, and the condition that the linearity of the initial position of the equal-strength cantilever beam 6 is poor is avoided. The elastic coupling 10 and the individual jackscrews are then tightened, at which point a certain pre-restoring force of the coil spring assembly 13 is ensured, so that the wire rope is under tension. Finally, the front cover 15 is sealed.

According to the optical fiber roof separation sensor provided by the embodiment of the utility model, in actual work, the displacement of the roof separation drives the fluke 21 anchored in the roof separation to move, so that the reel 14 is pulled to rotate by using the steel wire rope connected with the steel wire rope connecting block 20, and the coil spring assembly 13 coaxially connected with the reel 14 ensures that the steel wire rope is always in a tensioned state by the restoring force, so that the transmission error is greatly reduced. The rotation of the reel 14 drives the gear set input shaft 1 fastened together by the elastic coupling 10 and the jackscrews to rotate, and further, the rotational motion is converted into the deflection change of the constant-strength cantilever beam 6 and the digital change of the mechanical counter 9 by reasonable speed ratio distribution of the gear transmission module.

According to the utility model, the displacement of the steel wire rope fixedly connected with the fluke 21 is converted into the rotary motion of the gear transmission module, and the value of the mechanical counter 9 is in one-to-one correspondence with the change of the roof separation layer value through proper speed ratio selection. The pair of mechanical counters 9 are symmetrically arranged and inclined in angle, and the mechanical digital display mode can be displayed to site constructors in an omnibearing and visual mode, so that the condition of wrong reading is avoided. Meanwhile, the integrated installation rod module, the winding module and the gear transmission module convert large displacement of the steel wire rope into small displacement of the special-shaped nut 4, and the optical fiber sensing module converts the change of the small displacement of the special-shaped nut 4 into change of the wavelength of the optical fiber grating, so that the change of the roof separation value of the underground roadway is transmitted to the remote host computer.

The utility model has the technical key points that the optical fiber roof separation sensor with a novel structure is provided, and the optical fiber roof separation sensor is characterized by a modularized structure, an assembly mode and a convenient detachable installation mode, and aims to realize the real-time high-precision display of roof separation values on site, simultaneously, the remote monitoring can be conveniently carried out, and meanwhile, the intrinsic safety of the optical fiber is also greatly improved.

In the embodiments of the present utility model, technical features that are not described in detail are all existing technologies or conventional technical means, and are not described herein.

Finally, it should be noted that: the above examples are only specific embodiments of the present utility model, and are not intended to limit the scope of the present utility model. Those skilled in the art will appreciate that: any person skilled in the art may modify or easily conceive of changes to the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and are intended to be included in the scope of the present utility model.

Claims

1. The utility model provides an optic fibre roof separation layer sensor, its characterized in that includes wire winding module, gear drive module, display module and optical fiber sensing module, the last fixed fiber bragg grating that is provided with of optical fiber sensing module, wire winding module butt gear drive module's input shaft, gear drive module's output shaft butt display module and optical fiber sensing module respectively, wire winding module receive roof separation layer value through wire rope to with roof separation layer value conversion rotary displacement, gear drive module pass through gear assembly and convert rotary displacement into rotation number, and transmit display module and optical fiber sensing module with rotation number, display module converts rotation number into roof separation layer value on-the-spot demonstration, optical fiber sensing module converts rotation number into fiber bragg grating central wavelength value, and transmits fiber bragg grating central wavelength value to remote monitoring device through fiber network, remote monitoring device converts fiber bragg grating central wavelength value into roof separation layer value and realizes remote monitoring.

2. The optical fiber roof separation sensor according to claim 1, wherein the gear transmission module comprises a pair of symmetrically arranged gear assemblies with the same structure, the gear assemblies comprise a gear assembly body, a gear set is fixedly arranged in the gear assembly body, and the gear set comprises a three-stage gear reduction mechanism and a single-stage gear reduction mechanism.

3. The optical fiber roof separation sensor according to claim 2, wherein a gear set input shaft (1) is rotatably mounted on one side surface of the gear assembly body, a screw shaft (2) and a gear set output shaft (3) are rotatably mounted on the other opposite side surface of the gear assembly body, the gear set input shaft (1) and the gear set output shaft (3) are rotatably connected through a three-stage gear reduction mechanism, and the gear set input shaft (1) and the screw shaft (2) are rotatably connected through a single-stage gear reduction mechanism.

4. A fiber optic roof separation sensor according to claim 3 wherein the fiber optic sensing module comprises: the special-shaped nut (4), cylindric lock (5), equistrength cantilever beam (6), cantilever Liang Yakuai (7), cantilever beam installation piece (8) and fiber bragg grating, cylindric lock (5) fixed mounting is on the gear assembly body directly over screw shaft (2), special-shaped nut (4) rotate and install on screw shaft (2), spacing through-hole is seted up at one of them angle of special-shaped nut (4), cylindric lock (5) pass the spacing through-hole of special-shaped nut (4), cantilever beam installation piece (8) fixed mounting is on the gear assembly body of special-shaped nut (4) below, equistrength cantilever beam (6) pass through cantilever Liang Yakuai (7) fixed mounting on cantilever beam installation piece (8), fiber bragg grating pastes on equistrength cantilever beam (6).

5. The optical fiber roof separation sensor according to claim 4, wherein the special-shaped nut (4) is of a cross-shaped four-corner structure, the side lengths and the widths of the two ends of the equal-strength cantilever beam (6) are different, one end of the wide side length of the equal-strength cantilever beam (6) is fixedly arranged on the cantilever beam mounting block (8), and one end of the narrow side length of the equal-strength cantilever beam (6) is abutted with one corner of the special-shaped nut (4).

6. A fiber optic roof separation sensor according to claim 3 wherein the wire wrap module comprises: the automatic reset type winding wheel comprises a main mounting plate (11), a winding spring assembly mounting plate (12), a winding spring assembly (13) and a winding wheel (14) capable of automatically resetting, wherein the winding spring assembly mounting plate (12) is fixedly mounted on the main mounting plate (11), the winding spring assembly (13) is fixedly mounted on the winding spring assembly mounting plate (12), the winding wheel (14) is rotatably mounted on the winding spring assembly (13), and the end part, far away from the winding spring assembly (13), of the winding wheel (14) is rotatably connected with a gear set input shaft (1) through an elastic coupler (10) and a jackscrew.

7. The optical fiber roof separation sensor of claim 6, wherein the main mounting plate (11) and the coil spring assembly mounting plate (12) are integrally formed into a right-side open-ended mouth-shaped structure consisting of an upper mounting plate, a lower mounting plate and a side mounting plate.

8. A fibre-optic roof separation sensor according to claim 3, characterised in that the display module employs a three-position display mechanical counter (9), the output shaft (3) of the gear set being in rotational connection with the mechanical counter (9) via an elastic coupling (10) and a jackscrew.

9. A fiber optic roof separation sensor according to claim 3, characterized in that the housing of the fiber optic roof separation sensor comprises a top cover (18), a front cover (15) and a rear cover (19), wherein the top cover (18) is provided with a mounting through hole at a position corresponding to the circular through hole of the main mounting plate (11) and is fixedly provided with a mounting rod connecting piece (17), the mounting rod assembly (16) is fixedly connected with the mounting rod connecting piece (17) through a jackscrew into a whole, a steel wire rope passes through the mounting rod assembly (16) and is fixedly connected to the steel wire rope connecting block (20), one side of the mechanical counter (9) is fixed on the front cover (15), and the mechanical counter (9) is obliquely arranged at an angle of 45 degrees downwards.

10. The optical fiber roof separation sensor according to claim 9, wherein the installation rod connecting piece (17) is of a hollow cylinder structure, the installation rod assembly (16) comprises a section of steel pipe (22) and a plurality of flukes (21) penetrating through the steel pipe (22), the flukes (21) are formed by bending steel wires, and the flukes (21) are fixedly connected with the steel wire rope connecting block (20) through steel wires.