Long-gauge-length optical fiber deformation sensor

Abstract

The invention discloses a long-scale-distance optical fiber deformation sensor, and belongs to the technical field of measuring equipment, the long-scale-distance optical fiber deformation sensor comprises an outer frame, a winding roll is rotatably connected in the outer frame, a groove is formed in the winding roll, an optical fiber line is wound in the groove, the end part of the optical fiber line is connected with an optical fiber deformation sensor body, and a pressure contact assembly is arranged at the top end of the outer frame. A clamping assembly is arranged on the winding roll, and a leading-out assembly is arranged on the connecting rod; according to the invention, the optical fiber cable is effectively stored, so that the optical fiber cable can be stored and unfolded easily and orderly, the situations of disordered winding and knotting of the optical fiber cable in the use process are avoided, and the situation that the disordered optical fiber cable may influence signal transmission due to mutual extrusion and friction and further interferes with a measurement result is avoided; according to the optical fiber winding device, the optical fiber wound on the winding roll is pressed and limited through the arranged pressing contact assembly, the winding compactness of the optical fiber is improved, the problem that the wound optical fiber protrudes is solved, and the uniformity and attractiveness of the wound optical fiber are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of measuring equipment, and in particular relates to a long gauge length optical fiber deformation sensor. Background Art

[0002] In many fields such as structural health monitoring, civil engineering, and industrial measurement, accurate deformation measurement is crucial. Traditional deformation sensors such as strain gauges have many limitations, such as limited range, weak anti-interference ability, and difficulty in long-distance, distributed measurement in large structures or complex environments. With the rapid development of fiber optic sensing technology, it has gradually become a research hotspot due to its significant advantages such as small size, light weight, anti-electromagnetic interference, high sensitivity, and distributed measurement. Long-gauge fiber optic deformation sensors have emerged, which can make up for the shortcomings of traditional sensors and can monitor the deformation of large-scale structures over long distances, providing key data for safety assessments of large infrastructure such as bridges, dams, and tunnels. By accurately sensing the deformation of the structure under different working conditions, potential safety hazards can be warned in advance, effectively ensuring the long-term stable operation of these important facilities, and meeting the urgent needs of modern engineering for high-precision, long-distance deformation monitoring.

[0003] The working principle of the optical fiber deformation sensor is to use the changes in external physical quantities (such as strain, temperature, etc.) when light is transmitted in the optical fiber to modulate the characteristics of the optical signal, such as light intensity, wavelength, phase, etc. By detecting the changes in these optical signals, the deformation of the structure can be accurately measured. This sensor has many significant advantages. First, it is small in size and light in weight, which is easy to install on the surface or inside of various complex structures, and has little impact on the monitored object. Secondly, it has strong anti-electromagnetic interference ability and can work stably in a strong electromagnetic environment to ensure the accuracy of the measurement data. At the same time, the optical fiber deformation sensor has high sensitivity and can capture extremely subtle deformations, providing high-precision data support for structural safety assessment. Optical fiber deformation sensors are widely used in civil engineering, aerospace, petrochemical and other industries. In the construction of large-scale infrastructure such as bridges and dams, it can monitor the deformation state of the structure in real time and discover potential safety hazards in a timely manner; in the aerospace field, it can be used for aircraft structural health monitoring to ensure flight safety.

[0004] When long-gauge fiber optic deformation sensors are used on site, workers need to organize, unfold and lay long optical fibers. In the process, the optical fibers may become tangled if they are not careful. It takes a lot of effort to straighten them out, which affects the overall efficiency of detection. At the same time, due to the long length of the optical fiber, it is inconvenient to store it, which can easily lead to tangling of the optical fiber, causing deviations in the sensor output data, making it unable to accurately reflect the structural deformation, and reducing the reliability of monitoring.

[0005] Therefore, a long gauge length optical fiber deformation sensor is needed to solve the problems raised in the above background technology. Summary of the invention

[0006] The object of the present invention is to provide a long gauge length optical fiber deformation sensor to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a long-gauge optical fiber deformation sensor, comprising an outer frame, wherein the inner part of the outer frame is rotatably connected to a winding reel, a groove is provided in the winding reel and an optical fiber line is wound in the groove, the end of the optical fiber line is connected to the optical fiber deformation sensor body, both ends of the winding reel are fixed with shaft rods and the two shaft rods are coaxially arranged, a small motor is fixed on the outer side wall of the outer frame, the output end of the small motor is fixed to one of the shaft rods, a pressure touch assembly is provided on the top of the outer frame, a clamping assembly is provided on the winding reel, a connecting rod is fixed on the outer frame, and a lead-out assembly is provided on the connecting rod.

[0008] It should be noted in the scheme that the pressure-touch assembly includes a support rod fixed on the top of the external frame, an external connection tube is fixed in the middle of the support rod, a connecting rod is slidably connected in the external connection tube, and a pressure block a is fixed at the bottom end of the connecting rod.

[0009] It is further worth noting that a spring a is arranged inside the external tube, and a curved surface a is arranged at the bottom end of the pressing block a.

[0010] It should be further explained that two symmetrically distributed protrusions are fixed on the top of the connecting rod, and a guide groove that is slidably matched with the protrusions is opened on the side wall of the external connecting tube.

[0011] As a preferred embodiment, the clamping assembly includes a clamping seat fixed on the side of the winding reel, a through hole is formed through the interior of the clamping seat, and a threaded rod is threadedly connected to the side wall of the through hole.

[0012] As a preferred embodiment, one end of the threaded rod extends into the through hole and is provided with a curved end, and an end plate a is fixed to the outer end of the threaded rod.

[0013] As a preferred embodiment, the guide assembly includes a guide seat fixed at the end of the connecting rod, a slot is formed in the guide seat, a sliding rod slides through the side of the guide seat, a pressure block b located inside the slot is fixed to one end of the sliding rod, and a bottom block matching the pressure block b is fixed to the bottom surface of the slot.

[0014] As a preferred embodiment, an end plate b is fixed on the top of the slide rod, a spring b is sleeved on the side of the slide rod, and two ends of the spring b are respectively fixed to the end plate b and the side of the guide seat.

[0015] As a preferred embodiment, the ends of the bottom block and the pressing block b that are close to each other are both provided with a curved surface b, and a plurality of balls that are equidistantly distributed are rollingly connected to the side surfaces of the curved surface b.

[0016] As a preferred embodiment, a handle is fixed to the bottom end of the outer frame, and a silicone sleeve is provided on the surface of the handle.

[0017] Compared with the prior art, the long gauge length optical fiber deformation sensor provided by the present invention has at least the following beneficial effects:

[0018] (1) The optical fiber cable with a long length is wound up in an orderly manner through the winding reel, and one end of the optical fiber cable with the optical fiber deformation sensor body extends out from the lead-out assembly. By pulling the one end of the optical fiber cable with the optical fiber deformation sensor body, the optical fiber cable can be released for use, thereby effectively storing the optical fiber cable, making the storage and unfolding of the optical fiber cable easy and orderly, avoiding the situation of messy entanglement and knotting of the optical fiber cable during use, and greatly improving work efficiency. At the construction site, the workers can quickly pull out the required length of optical fiber cable without spending a lot of time to sort out the entangled optical fiber cable. At the same time, the optical fiber cable can be protected from excessive pulling, wear or trampling by external force, which can effectively reduce potential risks and extend the service life of the optical fiber cable. At the same time, the neatly wound optical fiber cable also helps to maintain the measurement accuracy of the optical fiber deformation sensor body, avoiding the messy optical fiber cables that may affect signal transmission due to mutual squeezing and friction, thereby interfering with the measurement results.

[0019] (2) The optical fiber cable wound onto the winding reel is pressed and limited by the provided pressure contact component, thereby improving the winding tightness of the optical fiber cable, preventing the problem of the rolled optical fiber cable protruding, and improving the neatness and aesthetics of the rolled optical fiber cable; one end of the optical fiber cable is firmly clamped by the provided clamping component, thereby improving the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall top view structure of the present invention;

[0021] Figure 2 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0022] Figure 3 for Figure 2 The enlarged structural diagram at C in the middle;

[0023] Figure 4 It is a schematic diagram of the overall side view structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the overall cross-sectional structure of the present invention;

[0025] Figure 6 for Figure 5The enlarged structural diagram at A in the middle;

[0026] Figure 7 for Figure 5 The enlarged structural diagram at B in the middle;

[0027] Figure 8 It is a schematic diagram of the partial structure of the pressure-touch assembly of the present invention.

[0028] In the figure: 1. pressure contact component; 101. pressure block a; 102. connecting rod; 103. external tube; 104. spring a; 105. arc surface a; 106. boss; 107. bracket rod; 2. clamping component; 201. clamping seat; 202. through hole; 203. threaded rod; 204. end plate a; 205. arc surface end; 3. lead-out component; 301. bottom block; 302. ball bearing; 303. pressure block b; 304. arc surface b; 305. sliding rod; 306. end plate b; 307. notch; 308. guide seat; 309. spring b; 4. external frame; 5. small motor; 6. winding reel; 7. groove; 8. handle; 9. silicone sleeve; 10. connecting rod; 11. optical fiber line; 12. optical fiber deformation sensor body; 13. shaft rod. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the embodiments.

[0030] See also Figure 1-8The present invention provides a long gauge length optical fiber deformation sensor, including an outer frame 4, the inner part of the outer frame 4 is rotatably connected to a winding drum 6, a groove 7 is arranged in the winding drum 6, and an optical fiber line 11 is wound in the groove 7, and the end of the optical fiber line 11 is connected to an optical fiber deformation sensor body 12, both ends of the winding drum 6 are fixed with shafts 13, and the two shafts 13 are coaxially arranged, a small motor 5 is fixed on the outer side wall of the outer frame 4, and the output end of the small motor 5 is fixed to one of the shafts 13, a pressure contact component 1 is arranged on the top of the outer frame 4, and a pressure contact component 1 is arranged on the winding drum 6. There is a clamping assembly 2, a connecting rod 10 is fixed on the outer frame 4, and a lead-out assembly 3 is arranged on the connecting rod 10; when in use, one end of the optical fiber line 11 is clamped and fixed to the winding drum 6 through the clamping assembly 2, and the winding drum 6 is driven to rotate by the small motor 5, so that the optical fiber line 11 with a long length is wound in an orderly manner through the winding drum 6, and one end of the optical fiber line 11 with the optical fiber deformation sensor body 12 extends out from the lead-out assembly 3, and the optical fiber line 11 can be pulled in by pulling one end of the optical fiber line 11 with the optical fiber deformation sensor body 12. The optical fiber line 11 can be released and used, so that the optical fiber line 11 can be effectively stored and stored, which can make the storage and unfolding of the optical fiber line 11 easy and orderly, avoid the situation that the optical fiber line 11 is tangled and knotted during use, and greatly improve the work efficiency. At the construction site, the staff can quickly pull out the optical fiber line 11 of the required length without spending a lot of time to sort out the entangled optical fiber line 11. At the same time, it can protect the optical fiber line 11 from excessive pulling, wear or trampling by external force, which can effectively reduce potential risks and extend the service life of the optical fiber line 11. At the same time, the neatly wound optical fiber line 11 also helps to maintain the measurement accuracy of the optical fiber deformation sensor body 12, and avoids the messy optical fiber lines that may affect the signal transmission due to mutual squeezing and friction, thereby interfering with the measurement results; the optical fiber line 11 wound onto the winding drum 6 is pressed and limited by the set pressure contact component 1, the winding tightness of the optical fiber line 11 is improved, the problem of the rolled optical fiber line 11 is prevented, and the neatness and aesthetics of the rolled optical fiber line 11 are improved; one end of the optical fiber line 11 is firmly clamped by the set clamping component 2, so as to improve the convenience of operation.

[0031] Further as Figure 2 , Figure 5 and Figure 6 As shown, it is worth explaining in detail that the pressure contact assembly 1 includes a support rod 107 fixed on the top of the external frame 4, an external tube 103 is fixed in the middle of the support rod 107, a connecting rod 102 is slidably connected in the external tube 103, and a pressure block a101 is fixed at the bottom end of the connecting rod 102; during specific operation, the connecting rod 102 is pushed by the spring a104, so that the pressure block a101 presses and limits the optical fiber line 11 wound onto the winding drum 6, thereby improving the winding tightness of the optical fiber line 11, preventing the problem of the wound optical fiber line 11 protruding, and improving the neatness and aesthetics of the optical fiber line 11 after winding.

[0032] Further Figure 6 As shown, it is worth explaining in detail that a spring a104 is arranged inside the external tube 103, and a curved surface a105 is arranged at the bottom end of the pressing block a101.

[0033] Further Figure 6 and Figure 8 As shown, it is worth explaining in detail that two symmetrically distributed bosses 106 are fixed on the top of the connecting rod 102, and a guide groove that is slidably adapted to the bosses 106 is opened on the side wall of the external tube 103; during specific operation, the movement and adjustment of the connecting rod 102 and the pressure block a101 are guided and limited by the provided bosses 106 and the guide grooves, thereby improving the stability of the movement and adjustment of the pressure block a101.

[0034] Further Figure 5 and Figure 7 As shown, it is worth explaining in detail that the clamping assembly 2 includes a clamping seat 201 fixed on the side of the winding reel 6, and a through hole 202 is penetrated inside the clamping seat 201, and a threaded rod 203 is threadedly connected to the side wall of the through hole 202; during specific operation, one end of the optical fiber 11 is inserted into the through hole 202, and the threaded rod 203 is tightened so that the threaded rod 203 can firmly clamp the optical fiber 11 in the through hole 202, thereby improving the convenience of operation.

[0035] Further Figure 7 As shown, it is worth explaining in detail that one end of the threaded rod 203 extends into the through hole 202 and is provided with a curved end 205, and an end plate a204 is fixed on the outer end of the threaded rod 203; during specific work, the threaded rod 203 can be rotated conveniently through the provided end plate a204, which is convenient for operation.

[0036] Further Figure 2 , Figure 3 and Figure 4 As shown, it is worth explaining in detail that the lead-out component 3 includes a guide seat 308 fixed at the end of the connecting rod 10, a slot 307 is penetrated in the guide seat 308, a slide bar 305 is slidably penetrated on the side of the guide seat 308, a pressure block b303 located inside the slot 307 is fixed on one end of the slide bar 305, and a bottom block 301 matched with the pressure block b303 is fixed on the bottom surface of the slot 307; one end of the optical fiber line 11 with the optical fiber deformation sensor body 12 extends out from the slot 307, and the released optical fiber line 11 is guided and limited by the cooperation of the set pressure block b303 and the bottom block 301, thereby improving the smoothness of the release operation of the optical fiber line 11.

[0037] Further Figure 3As shown, it is worth explaining in detail that an end plate b306 is fixed on the top of the sliding rod 305, and a spring b309 is sleeved on the side of the sliding rod 305, and the two ends of the spring b309 are respectively fixed to the end plate b306 and the side of the guide seat 308; during specific operation, the end plate b306 is pulled by the set spring b309, so that the pressure block b303 and the bottom block 301 press against the optical fiber line 11.

[0038] This scheme has the following working process: one end of the optical fiber line 11 is inserted into the through hole 202, and the threaded rod 203 is tightened so that the threaded rod 203 firmly clamps the optical fiber line 11 in the through hole 202, and the winding drum 6 is driven to rotate by the small motor 5, so that the longer optical fiber line 11 is orderly wound by the winding drum 6, and one end of the optical fiber line 11 with the optical fiber deformation sensor body 12 is extended from the groove 307, and by pulling one end of the optical fiber line 11 with the optical fiber deformation sensor body 12, the released optical fiber line 11 is guided and limited by the provided pressure block b303 and the bottom block 301, so as to improve the smoothness of the release operation of the optical fiber line 11, and the optical fiber line 11 and the optical fiber deformation sensor body 12 can be released for use.

[0039] Further Figure 3 As shown, it is worth explaining in detail that the ends of the bottom block 301 and the pressing block b303 that are close to each other are both provided with an arc surface b304, and a plurality of equally distributed balls 302 are rollingly connected on the side of the arc surface b304; during specific operation, the friction resistance of the pressing block b303 and the bottom block 301 to the optical fiber line 11 is reduced by the provided balls 302.

[0040] Further Figure 1 As shown, it is worth mentioning that a handle 8 is fixed to the bottom end of the outer frame 4, and a silicone sleeve 9 is provided on the surface of the handle 8; during specific work, the handle 8 is convenient for holding and using, and the silicone sleeve 9 is effectively used to improve the holding friction and prevent slipping.

[0041] In summary: one end of the optical fiber line 11 is clamped and fixed to the winding drum 6 by the clamping component 2, and the winding drum 6 is driven to rotate by the small motor 5, so that the longer optical fiber line 11 is orderly wound and wound by the winding drum 6, and one end of the optical fiber line 11 with the optical fiber deformation sensor body 12 extends out from the lead-out component 3. By pulling the one end of the optical fiber line 11 with the optical fiber deformation sensor body 12, the optical fiber line 11 can be released for use, so that the optical fiber line 11 is effectively stored and stored, and the storage and unfolding of the optical fiber line 11 become easy and orderly, avoiding the situation that the optical fiber line 11 is messy and tangled during use, and greatly improving the work efficiency. At the construction site, the staff can quickly pull out the optical fiber line 11 of the required length without any trouble. It takes a lot of time to sort out the tangled optical fiber line 11, and at the same time, it can protect the optical fiber line 11 from excessive pulling, wear or stepping on by external force, which can effectively reduce potential risks and extend the service life of the optical fiber line 11. At the same time, the neatly wound optical fiber line 11 also helps to maintain the measurement accuracy of the optical fiber deformation sensor body 12, and avoids the messy optical fiber lines from affecting signal transmission due to mutual squeezing and friction, thereby interfering with the measurement results; the optical fiber line 11 wound onto the winding reel 6 is pressed and limited by the set pressure-touch component 1, the tightness of the winding of the optical fiber line 11 is improved, the problem of protrusion of the wound optical fiber line 11 is prevented, and the neatness and aesthetics of the wound optical fiber line 11 are improved; one end of the optical fiber line 11 is firmly clamped by the set clamping component 2, which improves the convenience of operation.

[0042] The small motor 5 can be purchased on the market. The small motor 5 is equipped with a power supply, which is a mature technology in this field and has been fully disclosed, so it will not be repeated in the specification.

Claims

1. A long gauge optical fiber deformation sensor, comprising an outer frame (4), characterized in that: The outer frame (4) is internally rotatably connected to a winding drum (6), a groove (7) is provided in the winding drum (6), and an optical fiber line (11) is wound in the groove (7), and the end of the optical fiber line (11) is connected to the optical fiber deformation sensor body (12), and shafts (13) are fixed at both ends of the winding drum (6), and the two shafts (13) are coaxially arranged, and a small motor (5) is fixed on the outer wall of the outer frame (4), and the output end of the small motor (5) is fixed to one of the shafts (13), and a pressure contact component (1) is provided on the top of the outer frame (4), and a clamping component (2) is provided on the winding drum (6), and a connecting rod (10) is fixed on the outer frame (4), and a lead-out component (3) is provided on the connecting rod (10).

2. The long gauge optical fiber deformation sensor according to claim 1, characterized in that: The pressure contact assembly (1) comprises a support rod (107) fixed on the top end of the external frame (4), an external connection tube (103) is fixed in the middle of the support rod (107), a connecting rod (102) is slidably connected inside the external connection tube (103), and a pressure block a (101) is fixed at the bottom end of the connecting rod (102).

3. The long gauge optical fiber deformation sensor according to claim 2, characterized in that: A spring a (104) is arranged inside the external connection tube (103), and a curved surface a (105) is arranged at the bottom end of the pressing block a (101).

4. The long gauge optical fiber deformation sensor according to claim 3, characterized in that: Two symmetrically distributed protruding columns (106) are fixed on the top of the connecting rod (102), and a guide sliding groove slidably matched with the protruding columns (106) is provided on the side wall of the external connecting tube (103).

5. The long gauge optical fiber deformation sensor according to claim 1, characterized in that: The clamping assembly (2) comprises a clamping seat (201) fixed on the side of the winding reel (6), a through hole (202) is formed inside the clamping seat (201), and a threaded rod (203) is threadedly connected to the side wall of the through hole (202).

6. The long gauge optical fiber deformation sensor according to claim 5, characterized in that: One end of the threaded rod (203) extends into the through hole (202) and is provided with a curved end (205). An end plate a (204) is fixed to the outer end of the threaded rod (203).

7. The long gauge optical fiber deformation sensor according to claim 1, characterized in that: The guide assembly (3) comprises a guide seat (308) fixed at the end of the connecting rod (10), a slot (307) extending through the guide seat (308), a sliding rod (305) slidingly extending through the side surface of the guide seat (308), a pressure block b (303) located inside the slot (307) being fixed to one end of the sliding rod (305), and a bottom block (301) cooperating with the pressure block b (303) being fixed to the bottom surface of the slot (307).

8. The long gauge optical fiber deformation sensor according to claim 7, characterized in that: An end plate b (306) is fixed on the top of the slide bar (305), a spring b (309) is sleeved on the side of the slide bar (305), and two ends of the spring b (309) are respectively fixed to the end plate b (306) and the side of the guide seat (308).

9. The long gauge optical fiber deformation sensor according to claim 8, characterized in that: The ends of the bottom block (301) and the pressing block b (303) that are close to each other are both provided with a curved surface b (304), and a plurality of rolling balls (302) distributed at equal distances are rollingly connected to the side surface of the curved surface b (304).

10. The long gauge optical fiber deformation sensor according to claim 1, characterized in that: A handle (8) is fixed to the bottom end of the outer frame (4), and a silicone sleeve (9) is fitted on the surface of the handle (8).

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