A fiber grating cable force sensor packaging matrix structure

Abstract

The present invention discloses a fiber Bragg grating cable force sensor packaging matrix structure, including a packaging device, one end of the fiber Bragg grating is fixed in the transport packaging device, the packaging device includes a base, the top of the base is fixedly connected with a packaging tube, the outer wall of one end of the packaging tube is fixedly sleeved with one end of an armored spring, the armored spring fixing sleeve is arranged outside the fiber Bragg grating, the end of the packaging tube away from the armored spring is clamped and flattened, and the end of the clamped and flattened is sealed, and a fixing mechanism is arranged in the packaging tube, and the fixing mechanism is arranged corresponding to the fiber Bragg grating. The packaging method adopted by the present invention has the advantages of convenient operation, stable working performance and preventing the bending of the pigtail, improves the deformation capacity of the sensor, reduces the probability of damage to the sensor during transportation or installation, and improves the accuracy, stability and service life of the fiber Bragg grating sensor.

Description

Technical Field

[0001] The invention relates to the technical field of optical fiber grating sensors, and in particular to a fiber grating cable force sensor packaging matrix structure. Background Art

[0002] Steel cable structures are widely used in bridges, machinery and construction due to their high tensile strength, long load distance and high flexibility. Specific forms include bridge hangers, bridge stay cables, crane slings and cableways. Steel cables are exposed to harsh environments such as wind, rain, temperature changes and other uncertain external influences due to long-term service, which can easily cause corrosion damage and fatigue damage to the cables, leading to cable breakage, major accidents and economic losses.

[0003] At present, the main bridge cable force monitoring methods include flux sensing, piezoresistive sensing and fiber Bragg grating sensing. Fiber Bragg grating sensors have the advantages of high sensitivity, good durability and no influence from sparks, which can well meet the actual requirements of engineering projects. However, they have the disadvantages of being easily interfered with and low accuracy. Piezoresistive sensing methods are limited by durability. Summary of the invention

[0004] The purpose of the present invention is to provide a fiber Bragg grating cable force sensor packaging matrix structure to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention provides a fiber Bragg grating cable force sensor packaging matrix structure, including a packaging device, one end of the fiber Bragg grating is fixed in the conveying packaging device, the packaging device includes a base, the top of the base is fixedly connected to a packaging tube, the outer wall of one end of the packaging tube is fixedly sleeved with one end of an armored spring, the armored spring is fixedly sleeved outside the fiber Bragg grating, the end of the packaging tube away from the armored spring is clamped and flattened, and the clamped end is sealed, a fixing mechanism is arranged in the packaging tube, and the fixing mechanism is arranged corresponding to the fiber Bragg grating.

[0006] Preferably, the fixing mechanism includes a sleeve sleeved on the outer wall of the packaging tube, the outer wall of the packaging tube is provided with a threaded groove, the sleeve is provided with an internal thread, the packaging tube and the sleeve are threadedly connected to the internal thread through the threaded groove, the base is provided with a through groove, the through groove is arranged corresponding to the sleeve, a first semicircular fixing plate and a second semicircular fixing plate are arranged in the packaging tube, the first semicircular fixing plate and the second semicircular fixing plate are symmetrically arranged about the axis of the packaging tube, the inner walls of the first semicircular fixing plate and the second semicircular fixing plate abut against the outer wall of the optical fiber grating, a plurality of fixing blocks are fixedly connected in the packaging tube at equal intervals along the axis, the outer wall of the second semicircular fixing plate is fixedly connected to a side of the fixing block away from the inner wall of the packaging tube, an extrusion portion is provided in the packaging tube, the extrusion portion is arranged corresponding to the first semicircular fixing plate, and the inner diameter of the cylindrical structure formed by the first semicircular fixing plate and the second semicircular fixing plate is smaller than the outer diameter of the optical fiber grating.

[0007] The cam is provided with a toothed slot in the middle of the inner wall of the concave block, and the toothed slot is meshed with the toothed slots. The cam is provided with a toothed slot in the middle of the inner wall of the concave block, and the toothed slot is meshed with the gear. One end of the elastic member is fixedly connected to the inner wall of the packaging tube, and the other end of the elastic member is fixedly connected to the outer wall of the first semicircular fixing plate.

[0008] Preferably, the elastic member is a spring, one end of the spring is fixedly connected to the inner wall of the packaging tube, and the other end of the spring is fixedly connected to the outer wall of the first semicircular fixing plate.

[0009] Preferably, a slider is fixedly connected to the outer wall at the top of the convex block, the mounting hole passes through the slider and engages with the tooth groove on the concave block, a limiting groove is provided on the inner wall at the bottom end of the concave block, and the slider and the limiting groove are limitedly slidably matched.

[0010] Preferably, balls are provided on the inner wall of the limiting groove.

[0011] Preferably, the outer walls of the packaging tube and the sleeve are both coated with an anti-corrosion coating.

[0012] Preferably, an anti-slip rubber layer is provided between the inner walls of the first semicircular fixing plate and the second semicircular fixing plate and the outer wall of the fiber grating, and the anti-slip rubber layer is fixedly connected to the inner walls of the first semicircular fixing plate and the second semicircular fixing plate.

[0013] The present invention discloses the following technical effects: when the present invention is used, a fiber Bragg grating is preset in an armored spring, and then one end of the armored spring is fixedly sleeved on the open end of a packaging tube, the outer coating of one end of the fiber Bragg grating is peeled off, and the fiber Bragg grating is inserted into the packaging tube, and the fiber Bragg grating is fixed by a fixing mechanism in the packaging tube. The packaging method adopted by the present invention has the advantages of convenient operation, stable working performance, and preventing the bending of the pigtail, which improves the deformation ability of the sensor, reduces the probability of damage to the sensor during transportation or installation, and improves the accuracy, stability and service life of the fiber Bragg grating sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a cross-sectional view of the main view of the packaging base structure of a fiber Bragg grating cable force sensor of the present invention;

[0016] Figure 2 for Figure 1 The enlarged view of point B in the middle;

[0017] Figure 3 for Figure 1 Sectional view along AA;

[0018] Figure 4 It is a schematic diagram of the matching relationship between the convex block and the concave block of the present invention.

[0019] Among them, fiber Bragg grating 1, base 2, packaging tube 3, armor spring 4, sleeve 5, through groove 6, first semicircular fixing plate 7, second semicircular fixing plate 8, fixing block 9, convex block 10, mounting groove 11, limit block 12, connecting rod 13, abutment block 14, concave block 15, tooth plate 16, gear 17, spring 18, slider 19, ball 20, anti-slip rubber layer 21 DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] The present invention provides a cable force sensor packaging matrix structure of an optical fiber Bragg grating 1, comprising a packaging device, one end of the optical fiber Bragg grating 1 is fixed in the conveying packaging device, the packaging device comprises a base 2, the top of the base 2 is fixedly connected to a packaging tube 3, one end of the packaging tube 3 is fixedly sleeved with one end of an armor spring 4 on the outer wall, the armor spring 4 is fixedly sleeved outside the optical fiber Bragg grating 1, one end of the packaging tube 3 away from the armor spring 4 is clamped and flattened, and the clamped end is sealed, a fixing mechanism is arranged in the packaging tube 3, and the fixing mechanism is arranged corresponding to the optical fiber Bragg grating 1.

[0023] When in use, the optical fiber Bragg grating 1 is preset in the armor spring 4, and then one end of the armor spring 4 is fixedly sleeved on the open end of the packaging tube 3, the outer coating of one end of the optical fiber Bragg grating 1 is peeled off, and it is inserted into the packaging tube 3, and the optical fiber Bragg grating 1 is fixed by the fixing mechanism in the packaging tube 3. The mechanical gap of the flat head is sealed with a quick gel.

[0024] Furthermore, in order to achieve the fixation of the optical fiber Bragg grating 1, a fixing mechanism is provided, which includes a sleeve 5 sleeved on the outer wall of the packaging tube 3, the outer wall of the packaging tube 3 is provided with a thread groove, and the sleeve 5 is provided with an internal thread. The packaging tube 3 and the sleeve 5 are threadedly connected through the thread groove and the internal thread. A through groove 6 is opened on the base 2, and the through groove 6 is correspondingly arranged with the sleeve 5. A first semicircular fixing plate 7 and a second semicircular fixing plate 8 are arranged in the packaging tube 3. The first semicircular fixing plate 7 and the second semicircular fixing plate 8 are symmetrically arranged about the axis of the packaging tube 3. The inner walls of the first semicircular fixing plate 7 and the second semicircular fixing plate 8 abut against the outer wall of the optical fiber Bragg grating 1. A plurality of fixing blocks 9 are fixedly connected along the axis at equal intervals in the packaging tube 3. The outer wall of the second semicircular fixing plate 8 is fixedly connected to a side of the fixing block 9 away from the inner wall of the packaging tube 3. An extrusion portion is provided in the packaging tube 3, and the extrusion portion is arranged corresponding to the first semicircular fixing plate 7. The inner diameter of the cylindrical structure formed by the first semicircular fixing plate 7 and the second semicircular fixing plate 8 is smaller than the outer diameter of the optical fiber Bragg grating 1. After the fiber Bragg grating 1 is inserted into the packaging tube 3, the second semicircular fixing plate 8 supports it, and the first semicircular fixing plate 7 is squeezed by the extrusion part to make it abut against the outer wall of the fiber Bragg grating 1, and the fiber Bragg grating 1 is fixed by the extrusion effect. At the same time, the inner diameter of the cylindrical cross-section circle formed by the first semicircular fixing plate 7 and the second semicircular fixing plate 8 is smaller than the outer diameter of the fiber Bragg grating 1, thereby ensuring the extrusion effect of the first semicircular fixing plate 7.

[0025] Further, in order to extrude the second semicircular fixing plate 8, the second semicircular fixing plate 8 is used to extrude the optical fiber Bragg grating 1, and an extrusion portion is provided, the extrusion portion includes a convex block 10 fixedly connected to the outer wall of the first semicircular fixing plate 7, the inner wall of the sleeve 5 is provided with a mounting groove 11, and a plurality of limit blocks 12 are fixedly connected at equal intervals in the mounting groove 11, and the cross section of the limit blocks 12 is arranged in a trapezoidal shape, and a through hole is provided on the packaging tube 3, and a connecting rod 13 is slidably connected in the through hole, and an abutment block 14 is fixedly connected to one end of the connecting rod 13, and the abutment block 14 is slidably abutted with the limit block 12, and the packaging A plurality of concave blocks 15 are fixedly connected to the inner wall of the tube 3, and the concave blocks 15 are slidably matched with the convex blocks 10. The other end of the connecting rod 13 passes through the concave blocks 15 and is fixedly connected to a toothed plate 16. A slide groove is provided in the middle of the convex block 10, and mounting holes are provided on both sides of the slide groove. Gears 17 are rotatably connected in the mounting holes. The toothed plate 16 extends into the slide groove and meshes with the two gears 17. A tooth groove is provided in the middle of the inner wall of the concave block 15, and the tooth groove meshes with the gear 17. One end of a plurality of elastic members is fixedly connected to the inner wall of the packaging tube 3, and the other end of the elastic member is fixedly connected to the outer wall of the first semicircular fixed plate 7.

[0026] When in use, the sleeve 5 is rotated, and the sleeve 5 moves forward under the action of the thread groove on the outer wall of the packaging tube 3 and the internal thread on the inner wall of the sleeve 5. During the movement, the limit block 12 squeezes the abutment block 14, and the abutment block 14 slides on the inclined surface of the limit block 12, and feeds along the axial direction of the packaging tube 3 at the same time. The movement of the abutment block 14 synchronously drives the connecting rod 13 to move, and the movement of the connecting rod 13 drives the tooth plate 16 to slide, and the sliding of the tooth plate 16 drives the gear 17 to rotate. The rotation direction of the gear 17 is opposite to that of the tooth plate 16, and the gear 17 engages with the tooth groove on the concave groove to drive the concave groove. The block 15 moves, and the moving direction is opposite to the direction of the tooth plate 16, so that the distance between the concave block 15 and the convex block 10 is increased, thereby realizing the extrusion of the first semicircular fixing plate 7, so that the first semicircular fixing plate 7 is fed along the axis direction of the packaging tube 3, thereby extruding the optical fiber Bragg grating 1. At the same time, in order to increase the extrusion force, an elastic member is arranged on the inner wall of the packaging tube 3, and the elastic member is always in a hand-compressed state, so as to extrude the first semicircular fixing plate 7, thereby ensuring the improvement of the extrusion effect, and a nut can be sleeved on the outer wall of the sleeve 5, so as to facilitate the use of a wrench to rotate the sleeve 5. Since the extrusion force and direction are perpendicular to the axis of the packaging tube 3, and the force required for the feeding of the sleeve 5 is parallel to the axis of the packaging tube 3, that is, the direction of the force generated in the process of the optical fiber Bragg grating 1 being forced to break free from the first semicircular fixing plate 7 is perpendicular to the moving direction of the sleeve 5, and therefore, the displacement of the sleeve 5 will not be reversed. Such a setting ensures that the device is always in a relatively stable state, thereby improving the stability of the device.

[0027] Further, the elastic member is a spring 18, one end of which is fixedly connected to the inner wall of the packaging tube 3, and the other end of which is fixedly connected to the outer wall of the first semicircular fixing plate 7. The first semicircular fixing plate 7 is squeezed by the spring 18 to ensure the squeezing effect of the first semicircular fixing plate 7.

[0028] Furthermore, in order to ensure the relative stability between the concave block 15 and the convex block 10, a slider 19 is fixedly connected to the outer wall of the top end of the convex block 10, the mounting hole passes through the slider 19 and engages with the tooth groove on the concave block 15, and a limiting groove is provided on the inner wall of the bottom end of the concave block 15, and the slider 19 and the limiting groove are limitedly slidably matched.

[0029] Furthermore, in order to reduce the sliding friction between the concave block 15 and the convex block 10, a ball 20 is provided on the inner wall of the limiting groove.

[0030] Furthermore, in order to prevent the device from rusting in a humid environment, the outer walls of the packaging tube 3 and the sleeve 5 are coated with an anti-corrosion coating, and the anti-corrosion coating is iron red phenolic anti-rust paint.

[0031] Furthermore, in order to increase the relative friction between the first semicircular fixing plate 7 and the second semicircular fixing plate 8 and the optical fiber Bragg grating 1, and at the same time avoid damage to the optical fiber Bragg grating 1 by the first semicircular fixing plate 7 and the second semicircular fixing plate 8, an anti-slip rubber layer 21 is arranged between the inner walls of the first semicircular fixing plate 7 and the second semicircular fixing plate 8 and the outer wall of the optical fiber Bragg grating 1, and the anti-slip rubber layer 21 is fixedly connected to the inner walls of the first semicircular fixing plate 7 and the second semicircular fixing plate 8.

[0032] When the present invention is used, the optical fiber Bragg grating 1 is preset in the armor spring 4, and then one end of the armor spring 4 is fixedly sleeved on the open end of the packaging tube 3, the outer coat of one end of the optical fiber Bragg grating 1 is peeled off, and it is inserted into the packaging tube 3. The second semicircular fixed plate 8 supports it, and the sleeve 5 is rotated. Under the action of the thread groove on the outer wall of the packaging tube 3 and the internal thread on the inner wall of the sleeve 5, the sleeve 5 moves forward. During the movement, the limit block 12 squeezes the abutment block 14, and the abutment block 14 slides on the inclined surface of the limit block 12, and feeds along the axial direction of the packaging tube 3 at the same time. The movement of the abutment block 14 synchronously drives the connecting rod 13 to move The movement of the connecting rod 13 drives the tooth plate 16 to slide, and the sliding of the tooth plate 16 drives the gear 17 to rotate. The rotation direction of the gear 17 is opposite to that of the tooth plate 16. The gear 17 engages with the tooth groove on the concave groove to drive the concave block 15 to move. The movement direction is opposite to that of the tooth plate 16, so that the distance between the concave block 15 and the convex block 10 is increased, thereby realizing the extrusion of the first semicircular fixing plate 7, so that the first semicircular fixing plate 7 is fed along the axial direction of the packaging tube 3, thereby extruding the optical fiber Bragg grating 1. After fixing, iron red phenolic anti-rust paint is coated on the outside of the packaging tube 3 and the sleeve 5 for anti-rust treatment.

[0033] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A fiber Bragg grating cable force sensor packaging matrix structure, characterized in that: The invention comprises a packaging device, wherein one end of an optical fiber Bragg grating (1) is fixed in the transport packaging device, the packaging device comprises a base (2), the top of the base (2) is fixedly connected to a packaging tube (3), one end of the outer wall of the packaging tube (3) is fixedly sleeved with one end of an armor spring (4), the armor spring (4) is fixedly sleeved outside the optical fiber Bragg grating (1), the end of the packaging tube (3) away from the armor spring (4) is clamped and flattened, and the clamped and flattened end is sealed, and a fixing mechanism is arranged inside the packaging tube (3), and the fixing mechanism is arranged corresponding to the optical fiber Bragg grating (1); The fixing mechanism comprises a sleeve (5) sleeved on the outer wall of the packaging tube (3), the outer wall of the packaging tube (3) is provided with a thread groove, the sleeve (5) is provided with an internal thread, the packaging tube (3) and the sleeve (5) are threadedly connected via the thread groove and the internal thread, the base (2) is provided with a through groove (6), the through groove (6) is arranged corresponding to the sleeve (5), the packaging tube (3) is provided with a first semicircular fixing plate (7) and a second semicircular fixing plate (8), the first semicircular fixing plate (7) and the second semicircular fixing plate (8) are symmetrically arranged with respect to the axis of the packaging tube (3) , the inner walls of the first semicircular fixing plate (7) and the second semicircular fixing plate (8) are in contact with the outer wall of the optical fiber Bragg grating (1), a plurality of fixing blocks (9) are fixedly connected at equal intervals along the axis in the packaging tube (3), the outer wall of the second semicircular fixing plate (8) is fixedly connected to the side of the fixing block (9) away from the inner wall of the packaging tube (3), an extrusion portion is arranged in the packaging tube (3), and the extrusion portion is arranged corresponding to the first semicircular fixing plate (7), and the inner diameter of the cylindrical structure formed by the first semicircular fixing plate (7) and the second semicircular fixing plate (8) is smaller than the outer diameter of the optical fiber Bragg grating (1); The extrusion portion comprises a convex block (10) fixedly connected to the outer wall of the first semicircular fixing plate (7); the inner wall of the sleeve (5) is provided with a mounting groove (11); a plurality of limit blocks (12) are fixedly connected at equal intervals in the mounting groove (11); the cross section of the limit blocks (12) is arranged in a trapezoidal shape; a through hole is provided on the packaging tube (3); a connecting rod (13) is slidably connected in the through hole; one end of the connecting rod (13) is fixedly connected to an abutment block (14); the abutment block (14) is slidably abutted against the limit block (12); a plurality of concave blocks (15) are fixedly connected to the inner wall of the packaging tube (3); the concave blocks (15) Slidingly matched with the convex block (10), the other end of the connecting rod (13) passes through the concave block (15) and is fixedly connected with a toothed plate (16), a sliding groove is provided in the middle of the convex block (10), mounting holes are provided on both sides of the sliding groove, gears (17) are rotatably connected in the mounting holes, the toothed plate (16) extends into the sliding groove and meshes with the two gears (17), a tooth groove is provided in the middle of the inner wall of the concave block (15), the tooth groove meshes with the gear (17), one end of a plurality of elastic members is fixedly connected to the inner wall of the packaging tube (3), and the other end of the elastic member is fixedly connected to the outer wall of the first semicircular fixing plate (7); The elastic member is a spring (18), one end of the spring (18) is fixedly connected to the inner wall of the packaging tube (3), and the other end of the spring (18) is fixedly connected to the outer wall of the first semicircular fixing plate (7); The top outer wall of the convex block (10) is fixedly connected with a slider (19), the mounting hole passes through the slider (19) and meshes with the tooth groove on the concave block (15), the bottom inner wall of the concave block (15) is provided with a limiting groove, and the slider (19) and the limiting groove are limitedly slidably matched; A ball (20) is arranged on the inner wall of the limiting groove.

2. The fiber Bragg grating cable force sensor package matrix structure according to claim 1, characterized in that: The outer walls of the packaging tube (3) and the sleeve (5) are both coated with an anti-corrosion coating.

3. The fiber Bragg grating cable force sensor package matrix structure according to claim 1, characterized in that: An anti-slip rubber layer (21) is provided between the inner walls of the first semicircular fixing plate (7) and the second semicircular fixing plate (8) and the outer wall of the optical fiber grating (1), and the anti-slip rubber layer (21) is fixedly connected to the inner walls of the first semicircular fixing plate (7) and the second semicircular fixing plate (8).

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