Displacement sensor and measuring method

Abstract

The invention provides a displacement sensor and a measurement method, and relates to the technical field of displacement sensors, and the displacement sensor comprises a distributed optical fiber strain gauge, and sensing optical fibers of the distributed optical fiber strain gauge are continuously buried in a crack of an engineering building; the multiple pairs of mounting seats are fixedly arranged on the engineering building along the path of the crack; the main body part of the stay wire type displacement meter and the movable end of a stay wire are detachably connected with the corresponding mounting seats on the two sides of the crack respectively; and the distribution adjusting device is used for adjusting the distribution positions of the guyed displacement meters on the plurality of pairs of mounting seats. When the distributed optical fiber strain gauge monitors that an abnormal condition occurs at a certain position of the crack, the distribution positions of the stay wire type displacement meters on the multiple pairs of mounting seats are adjusted through the distribution adjusting device, and the crack of the engineering building is continuously monitored through the stay wire type displacement meters with the adjusted distribution positions; therefore, the crack change information at the abnormal position can be fully captured in time, and the accuracy of crack monitoring data is improved.

Description

Technical Field

[0001] The present application relates to the technical field of displacement sensors, and in particular to a displacement sensor and a measurement method. Background Art

[0002] A cable displacement meter is a sensor used to measure linear displacement. It is mainly composed of a cable, a measuring device, a signal processing unit, and a housing. The cable displacement meter can be used to monitor cracks in engineering buildings such as building walls, bridge beams, dam bodies, or tunnel linings. When using a cable displacement meter to monitor cracks in engineering buildings, the main body of the cable displacement meter is fixed to the building on one side of the crack, and the active end of the cable of the cable displacement meter is fixed to the building on the other side of the crack. When the crack changes, the cable will stretch or contract, thereby measuring the displacement change of the crack.

[0003] For example, the invention patent application with publication number CN111366117A discloses a wire-pulling displacement measuring device, comprising: a rotating hub for winding a steel wire rope for displacement measurement; a spiral spring, the outer ring fixed end of the spiral spring is fixedly arranged on the inner diameter surface of the rotating hub; a conductive slip ring, the inner ring fixed end of the spiral spring is fixedly connected to the conductive slip ring; a support plate, the conductive slip ring is arranged on the support plate, and the measurement of the linear displacement of the crack is achieved through the coordinated arrangement of the rotating hub, the spiral spring, the conductive slip ring and the support plate.

[0004] In the actual monitoring process of cracks in engineering buildings, environmental factors such as temperature, humidity, wind force, etc. may be unevenly distributed in different parts of the building structure, or the stress conditions of different parts of the engineering building structure are different. For example, in a beam structure, the mid-span part is mainly subjected to positive bending moment, while the support part is subjected to negative bending moment and shear force. The uneven distribution of these environmental factors or different stress conditions may cause the development of cracks in different positions to be different. Therefore, it is usually necessary to arrange multiple cable displacement meters on the engineering building to monitor the cracks at multiple points in order to understand the changes in various parts of the cracks and provide more comprehensive information for evaluating the safety of the structure. However, when multiple cable displacement meters are arranged, there is usually a long distance between adjacent cable displacement meters, so that the crack between the adjacent cable displacement meters cannot be monitored. When the cracks in this distance are abnormal, the cable displacement meters arranged at the original monitoring point cannot fully capture this information, resulting in the monitoring data not accurately reflecting the real changes of the cracks. Summary of the invention

[0005] The purpose of the present application is to provide a displacement sensor and a measurement method, which are used to solve the problem that when a draw-wire displacement meter in the related art monitors cracks, adjacent draw-wire displacement meters are usually spaced a long distance apart, making it impossible to monitor the section of the crack between adjacent draw-wire displacement meters, resulting in the monitoring data being unable to accurately reflect the actual changes in the cracks.

[0006] In the first aspect, the present application provides a displacement sensor that adopts the following technical solution:

[0007] A displacement sensor, comprising:

[0008] A distributed optical fiber strain gauge, wherein the sensing optical fibers of the distributed optical fiber strain gauge are continuously buried in cracks of the engineering building;

[0009] Mounting seats, wherein a plurality of pairs of mounting seats are provided, and the plurality of pairs of mounting seats are fixedly arranged on the engineering building along the path of the crack, and each pair of mounting seats is respectively arranged on both sides of the crack;

[0010] A wire-drawing displacement meter, wherein the main body and the movable ends of the wire-drawing displacement meter are detachably connected to the mounting seats corresponding to the two sides of the crack respectively;

[0011] A distribution adjustment device is used to adjust the distribution position of the wire-type displacement meter on multiple pairs of mounting seats.

[0012] Optionally, it also includes a support, and the distribution adjustment device includes a transfer mechanism and a carrier, the transfer mechanism is arranged on the engineering building, the carrier is connected to the transfer mechanism, the support is detachably connected to the mounting seat, the carrier can be detachably connected to the support, and the main body of the wire-type displacement meter or the movable end of the wire is connected to the support.

[0013] Optionally, it also includes a locking piece, and the distribution adjustment device also includes a locking mechanism and a disassembly mechanism, the locking mechanism is arranged on the carrier and is used to lock and connect the carrier and the support, the locking piece is arranged on the support, and the disassembly mechanism is arranged on the carrier and is used to drive the locking piece to connect or separate with the mounting seat.

[0014] Optionally, the locking mechanism includes a locking tongue and a telescopic driving member, a docking groove is provided on the support, the carrier can be plugged into the docking groove, the locking tongue is telescopically arranged on the carrier, the telescopic driving member is arranged on the carrier and is used to drive the locking tongue to be telescopic, and a locking groove is provided on the support, and after the carrier is plugged into the docking groove, the locking tongue can be plugged into the locking groove.

[0015] Optionally, the locking member is a stud, the support is provided with a first screw hole, the stud is screwed to the first screw hole, the mounting seat is provided with a second screw hole, and the disassembly and assembly mechanism can be connected to the stud and drive the stud to be screwed to or separated from the second screw hole.

[0016] Optionally, the disassembly and assembly mechanism includes a rotation drive assembly and a rotating part, wherein the rotating part is arranged on the lock tongue and connected to the lock tongue through a linkage assembly. When the lock tongue is extended relative to the carrier, the rotating part can be driven by the linkage assembly to extend relative to the lock tongue and be connected to the stud. The rotation drive assembly is arranged on the carrier and connected to the rotating part.

[0017] Optionally, the linkage assembly includes a telescopic cylinder and a linkage gear, the telescopic cylinder is telescopically arranged on the lock tongue, the rotating member is rotatably arranged on the telescopic cylinder, a tooth row is provided on the carrier, a linkage rack is provided on the telescopic cylinder, and the linkage gear is rotatably arranged on the lock tongue and meshes with the tooth row and the linkage rack.

[0018] Optionally, the rotating part is a sleeve, and the rotating drive assembly includes a rotating shaft and a rotating shaft driving part. The rotating shaft is rotatably arranged on the carrier, and the rotating shaft driving part is arranged on the carrier and connected to the rotating shaft. The sleeve is provided with a transmission groove, and the rotating shaft is provided with a transmission rod plugged into the transmission groove. The stud is provided with a transmission boss, and the sleeve can be socketed with the transmission boss.

[0019] Optionally, it also includes an angle adjustment mechanism, which can act on the main body and the movable end of the wire of the pull-wire displacement meter to adjust the angle of the main body and the movable end of the wire, so that the extension and retraction direction of the wire of the pull-wire displacement meter is adjusted to be the same as the opening and closing direction of the crack in the engineering building.

[0020] In a second aspect, a displacement measurement method provided by the present application adopts the following technical solution:

[0021] A displacement measurement method is based on the displacement sensor and comprises the following steps:

[0022] S1. Continuous and uninterrupted distributed monitoring of cracks in engineering buildings is carried out through distributed optical fiber strain gauges, and multi-point interval distributed monitoring of cracks in engineering buildings is carried out through wire-type displacement gauges;

[0023] S2. When the distributed optical fiber strain gauge detects an abnormality at a certain position of the crack, the distribution position of the wire displacement gauge on the multiple pairs of mounting seats is adjusted by the distribution adjustment device, and the wire displacement gauge closest to the abnormal position is transferred to the mounting seat at the abnormal position;

[0024] S3. Continue to monitor the cracks in the engineering building by adjusting the distribution position of the pull-wire displacement meter.

[0025] To summarize, the present application includes at least the following beneficial technical effects: continuous and uninterrupted distributed monitoring of cracks in engineering buildings is performed by distributed optical fiber strain gauges, and at the same time, multi-point interval distributed monitoring of cracks in engineering buildings is performed by wire-type displacement meters. When the distributed optical fiber strain gauge detects an abnormality at a certain position of the crack, the distribution position of the wire-type displacement meter on multiple pairs of mounting seats is adjusted by a distribution adjustment device, and the wire-type displacement meter closest to the abnormal position is transferred to the mounting seat at the abnormal position. The cracks in the engineering building continue to be monitored by the wire-type displacement meter after the distribution position is adjusted, so that the crack change information at the abnormal position can be timely and fully captured, thereby improving the accuracy of the crack monitoring data. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the displacement sensor in the embodiment of the present application;

[0027] Figure 2 for Figure 1 A partial enlarged schematic diagram of part A;

[0028] Figure 3 A cross-sectional view of the displacement sensor at a first viewing angle in an embodiment of the present application;

[0029] Figure 4 for Figure 3 A partial enlarged schematic diagram of part B;

[0030] Figure 5 A cross-sectional view of the displacement sensor at a second viewing angle in an embodiment of the present application;

[0031] Figure 6 for Figure 5 A partial enlarged schematic diagram of part C in the middle;

[0032] Figure 7 A cross-sectional view of the displacement sensor at a third viewing angle in an embodiment of the present application;

[0033] Figure 8 for Figure 7 A partial enlarged schematic diagram of part D in the middle.

[0034] Description of reference numerals:

[0035] 10. Mounting seat; 11. Second screw hole; 12. Positioning hole; 13. Positioning boss; 14. Anchor bolt;

[0036] 20. Pull-wire displacement meter; 21. Main body; 22. Pull wire;

[0037] 30. Support; 31. Docking groove; 32. Locking groove; 33. First screw hole; 34. Positioning groove;

[0038] 40. Transfer mechanism; 41. Longitudinal shift seat; 42. Longitudinal guide rail; 421. Longitudinal rack; 43. Longitudinal drive motor; 431. Longitudinal drive gear; 44. Transverse guide frame; 441. Transverse rack; 45. Transverse drive motor; 451. Transverse drive gear; 46. Linear screw lifting module;

[0039] 50. carrier; 51. gear row; 60. locking mechanism; 61. locking tongue; 611. telescopic drive rack; 62. telescopic drive motor; 63. telescopic drive gear; 64. bevel gear pair;

[0040] 70, disassembly and assembly mechanism; 71, sleeve; 711, transmission groove; 712, groove; 72, rotating shaft; 721, first worm gear; 722, transmission rod; 73, rotating shaft driving motor; 74, first worm; 75, telescopic cylinder; 751, linkage rack; 76, linkage gear; 80, stud; 81, transmission boss;

[0041] 90. Angle adjustment mechanism; 91. Turntable; 911. Second worm gear; 912. Bracket; 92. Rotary drive motor; 93. Second worm; 94. Cylindrical permanent magnetic coupling; 95. Positioning rod; 951. Ring plate; 96. Spring; 100. Engineering construction; 101. Crack; 102. Filler; 110. Distributed optical fiber strain gauge. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1 -Attached Figure 8 , further details of this application are given.

[0043] The embodiment of the present application discloses a displacement sensor.

[0044] A displacement sensor includes a distributed optical fiber strain gauge 110, a mounting seat 10, a wire-drawing displacement gauge 20, a support 30, a distribution adjustment device, a locking member and an angle adjustment mechanism 90.

[0045] Reference Figures 1 to 4 The crack 101 of the engineering building 100 is filled with a filler 102 such as an epoxy resin material, and the sensing optical fiber of the distributed optical fiber strain gauge 110 is continuously buried in the filler 102 in the crack 101 of the engineering building 100.

[0046] There are multiple pairs of mounting seats 10 , which are fixed on the engineering building 100 along the path of the crack 101 . Each pair of mounting seats 10 is respectively arranged on both sides of the crack 101 . The mounting seats 10 can be fixed on the engineering building 100 using anchor bolts 14 .

[0047] The main body 21 of the wire displacement meter 20 and the movable end of the wire 22 are detachably connected to the mounting seats 10 corresponding to the two sides of the crack 101. More specifically, the support 30 is detachably connected to the mounting seat 10, and the main body 21 or the movable end of the wire 22 of the wire displacement meter 20 is connected to the support 30. Furthermore, the mounting seat 10 is provided with a positioning boss 13, and the support 30 is provided with a positioning groove 34 that cooperates with the positioning boss 13, and the support 30 can be clamped with the positioning boss 13 of the mounting seat 10 through the positioning groove 34. The locking piece is arranged on the support 30, and the support 30 can be locked and connected with the mounting base 10 through the locking piece. The locking piece can be a stud 80. A first screw hole 33 is provided on the support 30, and the stud 80 is screwed with the first screw hole 33. A second screw hole 11 is provided on the mounting base 10. When the stud 80 is screwed with the second screw hole 11, the support 30 and the mounting base 10 are in a locked connection state. When the stud 80 is separated from the second screw hole 11, the support 30 and the mounting base 10 are in a detachable state.

[0048] There are multiple draw-wire displacement meters 20 , and the number of the draw-wire displacement meters 20 is less than the number of pairs of mounting seats 10 .

[0049] Reference Figures 1 to 4 The distribution adjustment device is used to adjust the distribution position of the wire displacement meter 20 on multiple pairs of mounting seats 10. The structure and working principle of the distribution adjustment device are as follows: the distribution adjustment device includes a transfer mechanism 40, a carrier 50, a locking mechanism 60 and a disassembly mechanism 70. The transfer mechanism 40 is arranged on the engineering building 100. The carrier 50 is connected to the transfer mechanism 40. The carrier 50 can be detachably connected to the support 30. The locking mechanism 60 is arranged on the carrier 50 and is used to lock and connect the carrier 50 and the support 30. The disassembly mechanism 70 is arranged on the carrier 50 and is used to drive the locking member to connect or separate with the mounting seat 10. More specifically, the disassembly mechanism 70 can be connected with the stud 80 and drive the stud 80 to be screwed or separated with the second screw hole 11.

[0050] When it is necessary to adjust the distribution position of the cable displacement meter 20 on multiple pairs of mounting seats 10 through the distribution adjustment device, the carrier 50 is driven by the transfer mechanism 40 to move until the carrier 50 is connected to the support 30, and the carrier 50 is locked and connected to the support 30 through the locking mechanism 60, and then connected to the stud 80 through the disassembly mechanism 70, and the stud 80 is driven to separate from the second screw hole 11, so that the support 30 and the mounting seat 10 are in a detachable state. Then, the carrier 50, the support 30 and the cable displacement meter 20 are driven by the transfer mechanism 40 to move to another pair of mounting seats 10, and then the stud 80 is driven to be screwed to the second screw hole 11 through the disassembly mechanism 70, and then the lock of the carrier 50 and the support 30 is released, and then the carrier 50 is driven to separate from the support 30 through the transfer mechanism 40, and the adjustment of the distribution position of the cable displacement meter 20 on multiple pairs of mounting seats 10 is completed.

[0051] Reference Figure 2 In an optional embodiment, the specific structure of the transfer mechanism 40 and the specific connection relationship with the carrier 50 are as follows: the transfer mechanism 40 includes a longitudinal movement component, a transverse movement component and a lifting component, the longitudinal movement component includes a longitudinal movement seat 41, a longitudinal guide rail 42 and a longitudinal drive motor 43, the longitudinal guide rail 42 is fixed on the engineering building 100, the longitudinal movement seat 41 is slidably arranged on the longitudinal guide rail 42, the longitudinal guide rail 42 is provided with a longitudinal rack 421, the longitudinal drive motor 43 is fixed on the longitudinal movement seat 41, and the output shaft of the longitudinal drive motor 43 is provided with a longitudinal drive gear 431 meshing with the longitudinal rack 421.

[0052] The transverse movement assembly includes a transverse guide frame 44 and a transverse drive motor 45. The transverse guide frame 44 is slidably arranged on the longitudinal movement seat 41. The transverse guide frame 44 is provided with a transverse rack 441. The transverse drive motor 45 is fixedly arranged on the longitudinal movement seat 41. The output shaft of the transverse drive motor 45 is provided with a transverse drive gear 451 meshing with the transverse rack 441. The lifting assembly is a linear screw lifting module 46. The linear screw lifting module 46 is connected to the transverse guide frame 44. The carrier 50 is fixedly connected to the slide of the linear screw lifting module 46.

[0053] Reference Figures 3 to 6 In an optional embodiment, the specific structure of the locking mechanism 60 and the specific connection relationship with the carrier 50 and the support 30 are as follows: the locking mechanism 60 includes a locking tongue 61 and a telescopic driving member, the support 30 is provided with a docking groove 31, the carrier 50 can be plugged into the docking groove 31, the locking tongue 61 is telescopically arranged on the carrier 50, and the support 30 is provided with a locking groove 32. After the carrier 50 is plugged into the docking groove 31, the locking tongue 61 can be plugged into the locking groove 32.

[0054] The telescopic driving component is arranged on the carrier 50, and is used to drive the locking tongue 61 to be telescopic. More specifically, the telescopic driving component includes a telescopic driving motor 62 and a telescopic driving gear 63. The telescopic driving gear 63 is rotatably arranged on the carrier 50, and the telescopic driving motor 62 is fixed on the carrier 50. The output shaft of the telescopic driving motor 62 is connected to the telescopic driving gear 63 through a bevel gear pair 64. The locking tongue 61 is provided with a telescopic driving rack 611 that meshes with the telescopic driving gear 63.

[0055] When it is necessary to lock or unlock the carrier 50 and the support 30 through the locking mechanism 60, the telescopic driving gear 63 is driven to rotate by the telescopic driving motor 62. Under the interaction of the telescopic driving gear 63 and the telescopic driving rack 611, the locking tongue 61 is driven to move telescopically relative to the carrier 50, and is plugged into or separated from the locking groove 32, thereby realizing the locking connection or unlocking of the carrier 50 and the support 30.

[0056] Reference Figure 3 , Figure 4 , Figure 7 and Figure 8 In an optional embodiment, the specific structure of the disassembly and assembly mechanism 70 and the specific connection relationship with the carrier 50 and the stud 80 are as follows: the disassembly and assembly mechanism 70 includes a rotation drive assembly and a rotating member, the rotating member is provided on the lock tongue 61, and is connected to the lock tongue 61 through a linkage assembly. When the lock tongue 61 is extended relative to the carrier 50, the linkage assembly can drive the rotating member to extend relative to the lock tongue 61 and connect to the stud 80. More specifically, the linkage assembly includes a telescopic cylinder 75 and a linkage gear 76, the telescopic cylinder 75 is telescopically provided on the lock tongue 61, the rotating member is rotatably provided on the telescopic cylinder 75, the carrier 50 is provided with a tooth row 51, the telescopic cylinder 75 is provided with a linkage rack 751, and the linkage gear 76 is rotatably provided on the lock tongue 61 and meshes with the tooth row 51 and the linkage rack 751.

[0057] The rotary drive assembly is disposed on the carrier 50 and connected to the rotating member. The rotary drive assembly and the rotating member can adopt the following structure and connection method: the rotating member is a sleeve 71, the rotary drive assembly includes a rotating shaft 72 and a rotating shaft driving member, the rotating shaft 72 is rotatably disposed on the carrier 50, the rotating shaft driving member is disposed on the carrier 50 and connected to the rotating shaft 72, more specifically, the rotating shaft driving member includes a rotating shaft driving motor 73 and a first worm 74, a first worm wheel 721 is provided on the rotating shaft 72, the first worm wheel 74 is rotatably disposed on the carrier 50 and meshes with the first worm wheel 721, and the rotating shaft driving motor 73 is fixedly disposed on the carrier 50 and meshes with the first worm wheel 74.

[0058] The sleeve 71 is provided with a transmission groove 711 with a square cross section, and the rotating shaft 72 is provided with a transmission rod 722 plugged into the transmission groove 711. The cross section of the transmission rod 722 is a square that matches the transmission groove 711. The stud 80 is provided with a transmission boss 81, and the sleeve 71 can be sleeved with the transmission boss 81. More specifically, the cross section of the transmission boss 81 can be set to a square or a regular hexagon. The sleeve 71 is provided with a groove 712 with a cross section that matches the transmission boss 81, and the sleeve 71 can be sleeved with the transmission boss 81 through the groove 712.

[0059] When the locking tongue 61 is driven to extend relative to the carrier 50 and plug into the locking groove 32 by the telescopic driving motor 62, the linkage gear 76 is driven to rotate under the action of the tooth row 51, and then the telescopic cylinder 75 is driven to extend relative to the locking tongue 61 under the interaction of the linkage gear 76 and the linkage rack 751, so that the sleeve 71 is sleeved with the transmission boss 81 through the groove 712, and the disassembly mechanism 70 is connected with the stud 80. Then, the first worm 74 is driven to rotate by the rotating shaft driving motor 73, and the first worm gear 721 and the rotating shaft 72 are driven to rotate by the first worm 74, and then the sleeve 71 is driven to rotate by the transmission rod 722, thereby driving the stud 80 to rotate, so as to achieve the screw connection or separation of the stud 80 and the second screw hole 11.

[0060] Reference Figures 1 to 4 After the distribution position of the wire-drawing displacement meter 20 on the plurality of pairs of mounting seats 10 is adjusted by the distribution adjustment device, the angle adjustment mechanism 90 can be used to act on the main body 21 of the wire-drawing displacement meter 20 and the movable end of the wire 22 to adjust the angle of the main body 21 of the wire-drawing displacement meter 20 and the movable end of the wire 22, so that the extension and retraction direction of the wire 22 of the wire-drawing displacement meter 20 is adjusted to be the same as the opening and closing direction of the crack 101 of the engineering building 100, so as to improve the measurement accuracy of the wire-drawing displacement meter 20 and reduce the wear of the wire 22 of the wire-drawing displacement meter 20 during extension and retraction.

[0061] In an optional embodiment, the structure and working principle of the angle adjustment mechanism 90 are as follows: the angle adjustment mechanism 90 includes a turntable 91, a rotary drive assembly and a positioning assembly. The turntable 91 is rotatably arranged on the support 30, and the rotary drive assembly is arranged on the carrier 50. The rotary drive assembly can drive the turntable 91 to rotate. The main body 21 of the cable displacement meter 20 or the movable end of the cable 22 is fixedly connected to the turntable 91. The positioning assembly is used to position the turntable 91 when the turntable 91 is rotated to the point where the extension and retraction direction of the cable 22 of the cable displacement meter 20 is the same as the opening and closing direction of the crack 101 of the engineering building 100.

[0062] More specifically, the rotary drive assembly can adopt the following structure: the rotary drive assembly includes a rotary drive motor 92, a second worm 93 is rotatably provided on the support 30, a second worm wheel 911 meshing with the second worm 93 is provided on the turntable 91, the rotary drive motor 92 is fixed on the carrier 50, and can be detachably connected to the second worm 93 through a cylindrical permanent magnet coupling 94.

[0063] More specifically, the positioning assembly can adopt the following structure: the positioning assembly includes a positioning rod 95 and a spring 96, a positioning hole 12 is provided on the mounting seat 10, a bracket 912 is provided on the turntable 91, the positioning rod 95 is slidably inserted into the bracket 912, an annular plate 951 is provided on the positioning rod 95, and the spring 96 is sleeved on the outside of the positioning rod 95, and the two ends of the spring 96 are respectively in contact with the bracket 912 and the annular plate 951, and the positioning rod 95 can be plugged into the positioning hole 12 under the elastic force of the spring 96. When the mounting seat 10 is fixedly installed on the engineering building 100, the angle of the positioning hole 12 can be adjusted according to the direction of the crack 101, so that when the positioning rod 95 is plugged into the positioning hole 12, the angle of the turntable 91 just satisfies the extension and contraction direction of the wire 22 of the wire displacement meter 20 and the opening and closing direction of the crack 101 of the engineering building 100.

[0064] After the carrier 50 is plugged into the docking groove 31 of the support 30, the rotary drive motor 92 is connected to the second worm 93 through the cylindrical permanent magnetic coupling 94. After the distribution position of the wire displacement meter 20 on the multiple pairs of mounting seats 10 is adjusted by the distribution adjustment device, the second worm 93 is driven to rotate by the rotary drive motor 92, and then the second worm gear 911 and the turntable 91 are driven to rotate by the second worm 93. When the turntable 91 rotates until the positioning rod 95 coincides with the positioning hole 12, the positioning rod 95 is plugged into the positioning hole 12 under the elastic force of the spring 96. At this time, the extension direction of the wire 22 of the wire displacement meter 20 is the same as the opening and closing direction of the crack 101 of the engineering building 100.

[0065] The embodiment of the present application also discloses a displacement measurement method.

[0066] A displacement measurement method is based on a displacement sensor and includes the following steps:

[0067] S1. The cracks 101 of the engineering building 100 are continuously and uninterruptedly monitored in a distributed manner by means of the distributed optical fiber strain gauge 110 , and the cracks 101 of the engineering building 100 are simultaneously monitored in a multi-point interval distributed manner by means of the wire-type displacement gauge 20 .

[0068] S2. When the distributed optical fiber strain gauge 110 detects an abnormal situation at a certain position of the crack 101, the distribution position of the draw-wire displacement gauge 20 on multiple pairs of mounting seats 10 is adjusted through the distribution adjustment device, and the draw-wire displacement gauge 20 closest to the abnormal position is transferred to the mounting seat 10 at the abnormal position.

[0069] The specific steps of adjusting the distribution position of the wire displacement meter 20 on the multiple pairs of mounting seats 10 by the distribution adjustment device are as follows: the longitudinal, transverse and vertical positions of the carrier 50 are adjusted by the longitudinal movement component, transverse movement component and lifting component of the transfer mechanism 40, and the carrier 50 is plugged into the docking groove 31 of the support 30, and the rotary drive motor 92 is connected to the second worm 93 through the cylindrical permanent magnetic coupling 94. Then, the locking tongue 61 is driven by the telescopic drive motor 62 to extend relative to the carrier 50 and plug into the locking groove 32, so that the carrier 50 is locked and connected with the support 30, and the telescopic cylinder 75 is driven by the linkage component to extend relative to the locking tongue 61, so that the sleeve 71 is sleeved with the transmission boss 81 through the groove 712, and the disassembly mechanism 70 is connected with the stud 80. Then, the shaft driving motor 73 drives the shaft 72 to rotate, and then the transmission rod 722 drives the sleeve 71 to rotate, and the sleeve 71 drives the stud 80 to rotate, so that the stud 80 is separated from the second screw hole 11, and the support 30 and the mounting base 10 are unlocked.

[0070] Then, the support 30 together with the wire-type displacement meter 20 is transferred to the mounting base 10 at the abnormal position through the transfer mechanism 40, and then the stud 80 is driven to be screwed with the second screw hole 11 through the disassembly and assembly mechanism 70 to lock the support 30 and the mounting base 10. The turntable 91 is driven to rotate by the rotary drive motor 92. When the turntable 91 rotates until the positioning rod 95 coincides with the positioning hole 12, the positioning rod 95 is plugged into the positioning hole 12 under the elastic force of the spring 96. At this time, the extension and retraction direction of the wire 22 of the wire-type displacement meter 20 is the same as the opening and closing direction of the crack 101 of the engineering building 100. Then, the locking tongue 61 is driven to withdraw from the locking groove 32 through the telescopic drive motor 62, and at the same time, the telescopic cylinder 75 and the sleeve 71 are driven to retract into the carrier 50 through the linkage assembly, and then the carrier 50 is driven to withdraw from the docking groove 31 of the support 30 through the transfer mechanism 40, and at the same time, the cylindrical permanent magnet coupling 94 disconnects the connection between the rotary drive motor 92 and the second worm gear 93.

[0071] S3. Continue to monitor the cracks 101 of the engineering building 100 by adjusting the distribution position of the wire displacement meter 20 .

[0072] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A displacement sensor, characterized in that: include: A distributed optical fiber strain gauge (110), wherein sensing optical fibers of the distributed optical fiber strain gauge (110) are continuously buried in cracks (101) of an engineering building (100); A mounting seat (10), wherein a plurality of pairs of the mounting seats (10) are provided, and the plurality of pairs of the mounting seats (10) are fixedly arranged on the engineering building (100) along the path of the crack (101), and each pair of the mounting seats (10) is respectively arranged on both sides of the crack (101); A wire-drawing displacement meter (20), wherein a main body (21) and a movable end of a wire (22) of the wire-drawing displacement meter (20) are respectively detachably connected to the mounting seats (10) corresponding to two sides of the crack (101); A distribution adjustment device is provided, wherein the distribution adjustment device is used to adjust the distribution position of the wire-drawing displacement meter (20) on a plurality of pairs of mounting seats (10).

2. A displacement sensor according to claim 1, characterized in that: The invention also comprises a support (30), wherein the distribution adjustment device comprises a transfer mechanism (40) and a carrier (50), wherein the transfer mechanism (40) is arranged on the engineering building (100), and the carrier (50) is connected to the transfer mechanism (40), the support (30) is detachably connected to the mounting seat (10), and the carrier (50) can be detachably connected to the support (30), and the main body (21) of the wire-drawing displacement meter (20) or the movable end of the wire (22) is connected to the support (30).

3. A displacement sensor according to claim 2, characterized in that: The distribution adjustment device also includes a locking member, and a locking mechanism (60) and a disassembly mechanism (70). The locking mechanism (60) is arranged on the carrier (50) and is used to lock and connect the carrier (50) and the support (30). The locking member is arranged on the support (30). The disassembly mechanism (70) is arranged on the carrier (50) and is used to drive the locking member to connect or separate from the mounting seat (10).

4. A displacement sensor according to claim 3, characterized in that: The locking mechanism (60) comprises a locking tongue (61) and a telescopic driving member; the support (30) is provided with a docking groove (31), the carrier (50) can be plugged into the docking groove (31), the locking tongue (61) can be telescopically arranged on the carrier (50), the telescopic driving member is arranged on the carrier (50) and is used to drive the locking tongue (61) to be telescopic; the support (30) is provided with a locking groove (32), and after the carrier (50) is plugged into the docking groove (31), the locking tongue (61) can be plugged into the locking groove (32).

5. A displacement sensor according to claim 4, characterized in that: The locking member is a stud (80), the support (30) is provided with a first screw hole (33), the stud (80) is screwed to the first screw hole (33), the mounting seat (10) is provided with a second screw hole (11), and the disassembly mechanism (70) can be connected to the stud (80) and drive the stud (80) to be screwed to or separated from the second screw hole (11).

6. A displacement sensor according to claim 5, characterized in that: The disassembly and assembly mechanism (70) comprises a rotation drive assembly and a rotating member, wherein the rotating member is arranged on the locking tongue (61) and is connected to the locking tongue (61) via a linkage assembly. When the locking tongue (61) is extended relative to the carrier (50), the rotating member can be driven by the linkage assembly to extend relative to the locking tongue (61) and be connected to the stud (80). The rotation drive assembly is arranged on the carrier (50) and is connected to the rotating member.

7. A displacement sensor according to claim 6, characterized in that: The linkage assembly comprises a telescopic cylinder (75) and a linkage gear (76); the telescopic cylinder (75) is telescopically arranged on the locking tongue (61); the rotating member is rotatably arranged on the telescopic cylinder (75); a tooth row (51) is arranged on the carrier (50); a linkage rack (751) is arranged on the telescopic cylinder (75); and the linkage gear (76) is rotatably arranged on the locking tongue (61) and meshes with the tooth row (51) and the linkage rack (751).

8. A displacement sensor according to claim 6, characterized in that: The rotating member is a sleeve (71), and the rotating drive assembly comprises a rotating shaft (72) and a rotating shaft driving member. The rotating shaft (72) is rotatably arranged on the carrier (50), and the rotating shaft driving member is arranged on the carrier (50) and connected to the rotating shaft (72). The sleeve (71) is provided with a transmission groove (711), and the rotating shaft (72) is provided with a transmission rod (722) plugged into the transmission groove (711). The stud (80) is provided with a transmission boss (81), and the sleeve (71) can be sleeved with the transmission boss (81).

9. The displacement sensor according to claim 1, characterized in that: The invention also comprises an angle adjustment mechanism (90), wherein the angle adjustment mechanism (90) can act on the main body (21) of the cable-type displacement meter (20) and the movable end of the cable (22) to adjust the angles of the main body (21) of the cable-type displacement meter (20) and the movable end of the cable (22), so that the extension and retraction direction of the cable (22) of the cable-type displacement meter (20) is adjusted to be the same as the opening and closing direction of the crack (101) of the engineering building (100).

10. A displacement measurement method, characterized in that: Based on the displacement sensor according to claim 1, and comprising the following steps: S1. Continuously and uninterruptedly distributed monitoring of cracks (101) of the engineering building (100) is performed by using a distributed optical fiber strain gauge (110), and at the same time, multi-point interval distributed monitoring of cracks (101) of the engineering building (100) is performed by using a wire displacement meter (20); S2. When the distributed optical fiber strain gauge (110) detects an abnormality at a certain position of the crack (101), the distribution position of the wire-type displacement gauge (20) on the plurality of pairs of mounting seats (10) is adjusted by the distribution adjustment device, and the wire-type displacement gauge (20) closest to the abnormal position is transferred to the mounting seat (10) at the abnormal position; S3. Continue to monitor the cracks (101) of the engineering building (100) by adjusting the distribution position of the wire displacement meter (20).

Images