Optical cable tensile deformation detection equipment

Abstract

The invention discloses optical cable tensile deformation detection equipment, and belongs to the technical field of optical cable deformation detection. Comprising an electric sliding frame, the electric sliding frame is connected with a supporting frame in a sliding mode, the supporting frame is fixedly connected with two sliding shafts which are symmetrically distributed, the two sliding shafts which are symmetrically distributed are jointly connected with a connecting frame in a sliding mode, the connecting frame is fixedly connected with a measuring rope, and the two sliding shafts which are symmetrically distributed are jointly connected with a limiting frame in a sliding mode. A first elastic element is arranged between the connecting frame and the supporting frame, and a driving assembly is arranged on the supporting frame. According to the invention, the optical cable is directly detected after being stretched by the tensile testing machine, the optical cable does not need to be disassembled, the phenomenon of radius resilience caused by disassembly of the optical cable is eliminated, and the measuring rope is attached to the outside of the optical cable in a lasso manner, so that the radius is detected through the perimeter of the cross section of the optical cable detection position. The error probability caused by the elliptical deformation of the optical cable is reduced, and the accuracy of the detection structure is improved.

Description

Technical Field

[0001] This invention relates to the field of optical cable deformation detection technology, and in particular to an optical cable tensile deformation detection device. Background Technology

[0002] Optical cables are the core carriers of information transmission. Their structure typically includes optical fibers, loose tubes, reinforcing members, and outer sheaths. During the service life of optical cables, tensile load is the main factor affecting their mechanical reliability. Aerial optical cables need to withstand wind vibration and icing loads, while duct optical cables also face significant axial tension during traction laying. Under tension, optical cables will undergo axial elongation and radial contraction. Accurate detection of their radial deformation is of great engineering significance for assessing Poisson's ratio and judging the strain compatibility between the sheath and the optical fiber.

[0003] In the field of existing optical cable tensile deformation detection technology, patent CN118602899B proposes a device for detecting the tensile deformation of optical fiber cables. This solution has two prominent limitations in practical applications: First, during the test, the optical cable to be tested needs to be disassembled from the tensile station, and then the radial dimension of the tensile section is measured using a diameter measuring mechanism. Since the tensile force of the optical cable is completely released after disassembly, its radial section will undergo springback deformation, resulting in a deviation between the measured diameter and the actual size under the tensile state, thus introducing detection errors. Second, this solution uses a compression method to apply secondary loading to the optical cable, first compressing the optical cable to a round shape before measuring the diameter. This forced rounding process will cause secondary deformation of the optical cable, changing its true diameter state, and the compression force is difficult to control precisely, resulting in poor consistency of results under different operating conditions. Summary of the Invention

[0004] In order to overcome the shortcomings mentioned in the background art, the present invention provides an optical cable tensile deformation detection device.

[0005] The technical solution of the present invention is as follows: an optical cable tensile deformation testing device, comprising an electric slide, the electric slide being mounted on a tensile testing machine, the electric slide being slidably connected to a support frame, the support frame being fixedly connected to two symmetrically distributed sliding shafts, the two symmetrically distributed sliding shafts being slidably connected to a connecting frame, the connecting frame being fixedly connected to a measuring rope, both ends of the measuring rope being connected to the connecting frame, the two symmetrically distributed sliding shafts being slidably connected to a limit frame, the limit frame being used to limit the measuring rope, a first elastic element being provided between the connecting frame and the support frame, and a driving component being provided on the support frame for driving the limit frame to move.

[0006] As a further preferred embodiment, the distance from the side of the support frame connected to the first elastic element to the central axis of the tensile testing machine where the optical cable is fixed is greater than the sum of half the length of the measuring rope and the normal length of the first elastic element.

[0007] As a further preferred embodiment, the limiting frame is fixedly connected to two symmetrically spaced rangefinders, and the connecting frame is fixedly connected to symmetrically distributed docking devices. The rangefinders and their corresponding docking devices are used to measure the distance between the limiting frame and the connecting frame.

[0008] As a further preferred embodiment, a connecting rope is provided between the measuring rope and the support frame.

[0009] As a further preferred embodiment, the limiting frame consists of two symmetrically distributed sliding rods and two symmetrically distributed limiting arc cylinders. The two sliding rods are slidably connected to the adjacent sliding shafts, and the two limiting arc cylinders are fixedly connected to the corresponding sliding rods. The two limiting arc cylinders are slidably connected to each other.

[0010] As a further preferred embodiment, the drive assembly includes a rotating shaft rotatably connected to the support frame, two symmetrically distributed sliding rods being fixedly connected to the rotating shaft with pull ropes, a transmission gear being fixedly connected to the rotating shaft, a transmission rack being slidably connected to the support frame for driving the transmission gear to rotate, and a drive module for driving the transmission rack to move is provided on the support frame.

[0011] As a further preferred embodiment, each of the two symmetrically distributed sliding rods is provided with a second elastic element between itself and the support frame. The second elastic element is used to drive the corresponding sliding rod to reset.

[0012] As a further preferred embodiment, the pull rope is an elastic rope, which is used to drive the corresponding limiting arc cylinder to adapt to the external contour of the optical cable via the corresponding sliding rod.

[0013] As a further preferred embodiment, the elastic coefficient of the second elastic element is smaller than that of the pull rope.

[0014] As a further preferred embodiment, the connecting rope is fixedly connected to the transmission rack.

[0015] The beneficial effects are as follows: 1. This invention allows for direct testing of the optical cable after tensile testing in a tensile testing machine, without the need to disassemble the optical cable, thus eliminating the radius rebound phenomenon caused by optical cable disassembly. Furthermore, the measuring rope is attached to the outside of the optical cable in the form of a lasso, so that the radius can be detected by measuring the perimeter of the cross-section at the optical cable testing position, thereby reducing the probability of errors caused by elliptical deformation of the optical cable and improving the accuracy of the testing structure.

[0016] 2. By applying tension to the measuring rope through the connecting rope, the measuring rope is kept taut when switching the working position of the optical cable, which effectively reduces the probability of the measuring rope sagging and ensures that the relative height between the measuring rope and the optical cable is consistent at all points. This significantly improves the positioning accuracy of the measuring rope and the stability of the circumference detection during multi-point detection.

[0017] 3. When the measuring rope is pushed to fit against the optical cable by the two limiting arc cylinders, the elastic deformation of the rope allows the two limiting arc cylinders to adapt to the elliptical cross-section of the optical cable detection position, reducing the probability that the measuring rope is not fully fitted against the optical cable due to the deformation of the elliptical cross-section of the optical cable, thus significantly improving the accuracy and reliability of optical cable detection. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the support frame and connecting frame of the present invention; Figure 3 This is a three-dimensional structural diagram of the connecting frame and measuring rope of the present invention; Figure 4 This is a three-dimensional structural diagram of the rangefinder and docking device of the present invention; Figure 5 This is a three-dimensional structural diagram of the sliding rod and the limiting arc cylinder of the present invention; Figure 6 This is a three-dimensional structural diagram of the rotating shaft and pull rope of the present invention.

[0019] Reference numerals: 1-Electric slide, 2-Tensile testing machine, 3-Support frame, 4-Sliding shaft, 5-Connecting frame, 6-Measuring rope, 7-Limiting frame, 8-First elastic element, 9-Range meter, 10-Connector, 11-Connecting rope, 201-Sliding rod, 202-Limiting arc cylinder, 203-Rotating shaft, 204-Pull rope, 205-Transmission gear, 206-Transmission rack, 207-Drive module, 208-Second elastic element. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] Existing optical cable tensile deformation detection devices have two limitations: First, the optical cable needs to be disassembled before measurement. Due to the release of tensile force, radial rebound occurs, causing the measured diameter to deviate from the actual tensile state and produce errors. Second, the optical cable is forced to return to a round shape by compression before diameter measurement, which not only causes secondary deformation and changes the original cross-sectional dimensions, but also makes it difficult to accurately control the compression force, resulting in measurement errors.

[0022] Example 1

[0023] A device for detecting the tensile deformation of optical cables, used to improve the accuracy of detection.

[0024] like Figures 1-4As shown, the system includes an electric slide 1 with two symmetrically distributed electric sliders. The electric slide 1 is mounted on a tensile testing machine 2. A support frame 3 is slidably connected to the electric slide 1. The two symmetrically distributed electric sliders on the electric slide 1 are fixedly connected to the support frame 3, thereby controlling the support frame 3 to slide up and down along the electric slide 1. Two symmetrically distributed sliding shafts 4 are fixedly connected to the support frame 3. The two symmetrically distributed sliding shafts 4 are slidably connected to a connecting frame 5. A measuring rope 6 is fixedly connected to the connecting frame 5. Both ends of the measuring rope 6 are connected to the front side of the connecting frame 5, forming a closed loop with the connecting frame 5, allowing the optical cable to enter the closed loop. The two symmetrically distributed sliding shafts 4 are slidably connected to a limit frame 7. Both ends of the measuring rope 6 are... After passing through the limiting frame 7, the two ends of the measuring rope 6 are in a close-fitting state within the limiting frame 7, and the inner side of the limiting frame 7 is also in a close-fitting state with the measuring rope 6. The limiting frame 7 is used to limit the measuring rope 6, so that the measuring rope 6 is close to the outside of the optical cable. A first elastic element 8 is provided between the connecting frame 5 and the support frame 3. The first elastic element 8 is a tension spring. The first elastic element 8 is used to keep the measuring rope 6 in a taut state, so that the front part of the measuring rope 6 is close to the optical cable. The distance from the side of the support frame 3 connected to the first elastic element 8 to the center axis of the tensile testing machine 2 where the optical cable is fixed is greater than the sum of half the length of the measuring rope 6 and the normal length of the first elastic element 8. That is, during the process of the optical cable passing through the measuring rope 6 and being installed in the tensile testing machine 2, the optical cable will be pulled by the measuring rope 6. The connecting frame 5 slides along two symmetrically distributed sliding shafts 4. The support frame 3 is equipped with a drive assembly for moving the limiting frame 7. In this embodiment, the drive assembly is an electric push rod (not shown in the figure), but this is limited to this embodiment. The electric push rod is fixedly connected to the support frame 3, and its telescopic end is fixedly connected to the limiting frame 7 to control the limiting frame 7 to slide along the two symmetrically distributed sliding shafts 4. The limiting frame 7 is fixedly connected to two symmetrically distributed rangefinders 9. The rangefinders 9 can be laser displacement sensors. The connecting frame 5 is fixedly connected to two symmetrically distributed docking devices 10. The docking devices 10 can be high-emissivity patches or metal reflective surfaces to reduce interference from external light, offering advantages of high precision and fast response. The rangefinders 9 and their corresponding docking devices... 10 is used to measure the distance between the limiting frame 7 and the connecting frame 5. A connecting rope 11 is provided between the measuring rope 6 and the support frame 3. In this embodiment, the connecting rope 11 is an elastic rope, and the elastic coefficient of the connecting rope 11 is less than the elastic coefficient of the first elastic element 8. However, this is limited to this embodiment. That is, when the optical cable is not installed, the connecting rope 11 is in a stretched state. The connecting rope 11 is used to keep the measuring rope 6 taut. After the optical cable is installed, the front part of the measuring rope 6 is in contact with the optical cable, and the connecting rope 11 is shortened but still in a stretched state. This is used to pull the front part of the measuring rope 6 to move synchronously when the measuring rope 6 changes the detection position of the optical cable, reducing the probability of the measuring rope 6 sagging due to friction when moving along the outside of the optical cable. After the optical cable is installed in the tensile testing machine 2...The connection point between the measuring rope 6 and the connecting frame 5, and the connecting rope 11, are located on opposite sides of the optical cable fixing center axis of the tensile testing machine 2.

[0025] Working principle: When the optical cable needs to undergo tensile deformation, the operator installs the optical cable into the tensile testing machine 2. During this process, the optical cable is passed through the measuring rope 6. While the optical cable is fixed, it pulls the connecting frame 5 along two symmetrically distributed sliding shafts 4 via the measuring rope 6, causing the two symmetrically distributed first elastic elements 8 to stretch. At this moment, the measuring rope 6 is pressed tightly against the outside of the optical cable by the force of the first elastic elements 8. During this period, the connecting rope 11 shortens but remains under tension, used to pull the measuring rope 6 to keep it level. Then, the operator turns on the tensile testing machine 2 to perform tensile deformation on the optical cable. After the optical cable is stretched, the staff activates the electric slide 1. The electric slide 1 drives the support frame 3 on it to move synchronously. The support frame 3 drives the measuring rope 6 on it to move synchronously through two symmetrically distributed sliding shafts 4 and connecting frame 5. This continues until the measuring rope 6 moves to the measuring position of the optical cable, after which the electric slide 1 is turned off. During this period, the support frame 3 moves synchronously through the connecting rope 11 on it, which is in a stretched state. This causes the connecting rope 11 to drive the connection of the measuring rope 6 to move synchronously, so as to reduce the probability of the measuring rope 6 sagging when moving along the optical cable and ensure that the height of the measuring rope 6 relative to the optical cable is the same at all points.

[0026] Once the measuring rope 6 reaches the measuring position, the operator activates the drive assembly, causing it to move the limiting frame 7 forward along two symmetrically distributed sliding shafts 4. During this movement, the limiting frame 7 simultaneously moves the rangefinder 9 on it. This continues until the limiting frame 7 can no longer move along the measuring rope 6, at which point the drive assembly is deactivated. At this point, the measuring rope 6 is tightly fitted against the outside of the optical cable. The rangefinder 9 monitors and reports the distance to the corresponding connector 10, thereby determining the circumference of the optical cable at the measurement position (the length of the measuring rope 6 minus the distances between the two rangefinders 9 and their corresponding connectors 10, as well as the thickness of some components, depending on the actual situation). (Judgment), and calculate the corresponding diameter to complete the diameter value of the stretched optical cable, thereby completing the optical cable inspection. Then, the drive component is activated to drive the limit frame 7 to reset to the position relative to the connecting frame 5. At this time, the measuring rope 6 is no longer in close contact with the optical cable. When it is necessary to measure other positions of the optical cable, the above steps are repeated. If it is not necessary to measure other positions of the optical cable, the electric slide 1 drives the support frame 3 to reset to the initial position and removes the optical cable. At this time, the measuring rope 6 is not limited by the optical cable. The first elastic element 8 drives the connecting frame 5 to reset, and the connecting rope 11 is extended to the initial state again. When it is necessary to inspect the optical cable again, the above steps are repeated.

[0027] Example 2

[0028] An optical cable tensile deformation detection device is further improved based on Example 1.

[0029] like Figure 2, Figure 3 , Figure 5 and Figure 6 As shown, the limiting frame 7 consists of two symmetrically distributed sliding rods 201 and two symmetrically distributed limiting arc cylinders 202. The diameter of the measuring rope 6 is twice the same as the inner diameter of the limiting arc cylinder 202. The two sliding rods 201 are slidably connected to adjacent sliding shafts 4, and the two limiting arc cylinders 202 are fixedly connected to their corresponding sliding rods 201. The two limiting arc cylinders 202 are slidably connected to each other. The driving component includes a rotating shaft 203, which is rotatably connected to the front side of the support frame 3. Each of the two symmetrically distributed sliding rods 201 is fixedly connected to the rotating shaft 203 with a pull rope 204. In the initial state, the pull rope 204 is not entangled on the rotating shaft 203. The middle part of the rotating shaft 203 is fixed. A transmission gear 205 is connected to the support frame 3, and a transmission rack 206 for driving the transmission gear 205 to rotate is slidably connected to the front side of the support frame 3. In the initial state, the transmission gear 205 and the transmission rack 206 are separated, and there is a gap between them. A drive module 207 for driving the transmission rack 206 is provided on the support frame 3. The drive module 207 consists of a servo motor and a spur gear. The servo motor is fixedly connected to the front side of the support frame 3, and the spur gear is fixedly connected to the output shaft of the servo motor. The transmission rack 206 has teeth on both its upper and lower sides. The teeth on the upper side of the transmission rack 206 are used to drive the transmission gear 205 to rotate. The spur gear on the output shaft meshes with the teeth on the lower side of the transmission rack 206. The drive module 207 drives the two sliding rods 201 to slide along the adjacent sliding shafts 4 via the transmission rack 206, transmission gear 205, rotating shaft 203, and two pull ropes 204. A second elastic element 208 is provided between each of the symmetrically distributed sliding rods 201 and the support frame 3. The second elastic element 208 is a spring and is used to reset the corresponding sliding rod 201. The pull rope 204 is an elastic rope and is used to drive the corresponding limiting arc cylinder 202 to adapt to the outer contour of the optical cable via the corresponding sliding rod 201. The elastic coefficient of the second elastic element 208 is less than the elastic coefficient of the pull rope 204. The coefficient is used to cause the corresponding second elastic element 208 to compress preferentially when the rotating shaft 203 winds up the pull rope 204 to drive the corresponding sliding rod 201. The connecting rope 11 is fixedly connected to the transmission rack 206. In this embodiment, the connecting rope 11 does not have elastic deformation function. In the initial state, the connecting rope 11 pulls the measuring rope 6 into a taut state, and the front part of the measuring rope 6 is not in contact with the optical cable. When the transmission rack 206 slides backward along the support frame 3, the connecting rope 11 drives the measuring rope 6 to gradually contact the front part of the optical cable, ensuring that the height of the measuring rope 6 is consistent at all points. When changing the optical cable detection position, the front part of the measuring rope 6 is no longer in contact with the optical cable, reducing the resistance between the measuring rope 6 and the optical cable when the position changes.

[0030] Working principle: When the limiting frame 7 needs to slide along two symmetrically distributed sliding shafts 4, that is, when the two symmetrically distributed sliding rods 201 slide along the corresponding sliding shafts 4, the drive module 207 is activated. The drive module 207 drives the transmission rack 206 to slide backward along the support frame 3. The transmission rack 206 drives the connecting rope 11 to move synchronously. At the same time, the first elastic element 8 shortens but is still in a stretched state until the measuring rope 6 is in contact with the optical cable. Then, the transmission rack 206 continues to drive the connecting rope 11 to move, so that the connecting rope 11 is in a relaxed state. The transmission rack 206 meshes with the transmission gear 205. At this time, the transmission rack 206 drives the rotating shaft 203 to rotate through the transmission gear 205. The rotating shaft 203 rotates and winds up the two pull ropes 204. The pull ropes 204 pull the corresponding sliding rods 201 to slide along the adjacent sliding shafts 4. At the same time, the second elastic element 208 is compressed, and the sliding rods 201... 1. The corresponding limiting arc cylinder 202 slides. The two limiting arc cylinders 202 move along the measuring rope 6. When the cross-section of the optical cable is elliptical due to tension or external force during production, and the optical cable is installed on the tensile testing machine 2 for testing, and the major axis and minor axis of the optical cable cross-section are not parallel to the sliding axis 4, one of the limiting arc cylinders 202 first contacts the optical cable and cannot move, while the other limiting arc cylinder 202 does not contact the optical cable. At this moment, the transmission rack 206 continues to drive the transmission gear 205 to wind up the two pull ropes 204. The pull rope 204 corresponding to the limiting arc cylinder 202 that first contacts the optical cable begins to stretch. This continues until the other limiting arc cylinder 202 contacts the optical cable and the corresponding pull rope 204 is stretched, and then the drive module 207 is closed. At this moment, the two rangefinders 9 detect the distance to the corresponding docking device 10, and then calculate the average diameter of the optical cable based on the circumference of the optical cable detection position.

[0031] After the optical cable is tested, the drive module 207 is activated. The drive module 207 drives the rotating shaft 203 to rotate in the reverse direction via the transmission rack 206 and the transmission gear 205. The rotating shaft 203 releases the two pull ropes 204 on it. At the same time, the second elastic element 208 pushes the corresponding sliding rod 201 to reset. The two sliding rods 201 respectively drive the corresponding limiting arc cylinder 202 to reset to the initial state relative to the connecting frame 5. When the transmission rack 206 separates from the transmission gear 205, the transmission rack 206 continues to reset and pulls the connecting rope 11 to tighten, so that the connecting rope 11 pulls the measuring rope 6 to disengage. At the same time, the first elastic element 8 is stretched. This continues until the transmission rack 206 resets to the initial position. When the optical cable needs to be tested again, the above steps are repeated.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for detecting tensile deformation of optical cables, characterized in that: The device includes an electric slide (1) mounted on a tensile testing machine (2). The electric slide (1) is slidably connected to a support frame (3). The support frame (3) is fixedly connected to two symmetrically distributed sliding shafts (4). The two symmetrically distributed sliding shafts (4) are slidably connected to a connecting frame (5). The connecting frame (5) is fixedly connected to a measuring rope (6). Both ends of the measuring rope (6) are connected to the connecting frame (5). The two symmetrically distributed sliding shafts (4) are slidably connected to a limit frame (7). The limit frame (7) is used to limit the measuring rope (6). A first elastic element (8) is provided between the connecting frame (5) and the support frame (3). The support frame (3) is provided with a drive assembly for driving the limit frame (7) to move.

2. The optical cable tensile deformation detection device according to claim 1, characterized in that: The distance from the side of the support frame (3) connected to the first elastic element (8) to the center axis of the tensile testing machine (2) at the optical cable fixing point is greater than the sum of half the length of the measuring rope (6) and the normal length of the first elastic element (8).

3. The optical cable tensile deformation detection device according to claim 1, characterized in that: The limiting frame (7) is fixedly connected to two symmetrically distributed rangefinders (9), and the connecting frame (5) is fixedly connected to symmetrically distributed docking devices (10). The rangefinders (9) and the corresponding docking devices (10) are used to measure the distance between the limiting frame (7) and the connecting frame (5).

4. The optical cable tensile deformation detection device according to claim 1, characterized in that: A connecting rope (11) is provided between the measuring rope (6) and the support frame (3).

5. The optical cable tensile deformation detection device according to claim 4, characterized in that: The limiting frame (7) consists of two symmetrically distributed sliding rods (201) and two symmetrically distributed limiting arc cylinders (202). The two sliding rods (201) are slidably connected to the adjacent sliding shafts (4), and the two limiting arc cylinders (202) are fixedly connected to the corresponding sliding rods (201). The two limiting arc cylinders (202) are slidably connected to each other.

6. The optical cable tensile deformation detection device according to claim 5, characterized in that: The drive assembly includes a rotating shaft (203), which is rotatably connected to the support frame (3). Two symmetrically distributed sliding rods (201) are fixedly connected to the rotating shaft (203) with pull ropes (204). The rotating shaft (203) is fixedly connected to a transmission gear (205). The support frame (3) is slidably connected to a transmission rack (206) for driving the transmission gear (205) to rotate. The support frame (3) is provided with a drive module (207) for driving the transmission rack (206) to move.

7. The optical cable tensile deformation detection device according to claim 6, characterized in that: Two symmetrically distributed sliding rods (201) are each provided with a second elastic element (208) between them and the support frame (3). The second elastic element (208) is used to drive the corresponding sliding rod (201) to reset.

8. The optical cable tensile deformation detection device according to claim 7, characterized in that: The pull rope (204) is an elastic rope, and the pull rope (204) is used to drive the corresponding limiting arc cylinder (202) to adapt to the outer contour of the optical cable through the corresponding sliding rod (201).

9. The optical cable tensile deformation detection device according to claim 8, characterized in that: The elastic coefficient of the second elastic element (208) is less than that of the elastic coefficient of the pull rope (204).

10. The optical cable tensile deformation detection device according to claim 6, characterized in that: The connecting rope (11) is fixedly connected to the transmission rack (206).

Images