A cable deformation device for a deformation fence

Abstract

The embodiment of the application discloses a cable deformation device for deformation fence, which comprises a shell, the shell comprises a box body and a box cover clamped with the box body, a fence deformation conversion structure and a cable deformation structure are arranged in the inner cavity of the box body, the fence deformation conversion structure comprises a pulley one, a pulley two, a cable tensioning wheel one and a fence deformation pull rope, the cable deformation structure comprises two cable positioning clamps, a cable tensioning wheel two and a sensing cable. The cable deformation device for deformation fence converts the tension change into the bending state change of the cable; the structure is simple, the cost is low, it is a passive component, power supply is not needed, and it is suitable for field installation; when the device is used as a sensing unit in a deformation fence project, a plurality of sensing units can be connected in series through one cable, the cable does not need to be broken, the cable can be directly installed to the sensing unit, and the fiber cable fusion is avoided when the plurality of sensing units are connected in series.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical fiber sensing, and more particularly to an optical cable deformation device for deformation fence. BACKGROUND

[0002] In the security protection using the deformation fence device, when the intrusion activity occurs, some components in the fence device will be deformed, and the deformation fence system senses the occurrence of the intrusion activity by detecting the deformation. The existing technology sensors for detecting the deformation mainly include the following ways: electric stress sensor, P-OTDR (polarization sensitive-OTDR) and B-OTDR (Brillouin-OTDR), fiber grating sensor, and fiber micro-bending sensor.

[0003] When the electric stress sensor is used as the sensing unit, the cost is low, but the electric stress sensor is an active device, and the power supply needs to be provided for the sensing unit, which is inconvenient to use in some application occasions.

[0004] When the P-OTDR (polarization sensitive-OTDR), B-OTDR (Brillouin-OTDR), fiber grating sensor, and fiber micro-bending sensor are used as the sensing unit, the sensing components placed at the remote end are optical cables or optical fibers, which do not need power supply, and are particularly suitable for application in the wild.

[0005] However, different optical cable deformation fence systems have their own shortcomings: the B-OTDR is a distributed sensing mode, but the cost of the B-OTDR terminal is high; when the P-OTDR is used as the distributed sensing unit, a large number of optical cables need to be formed into a network, resulting in high optical cable cost and construction cost; when the fiber grating sensor and the fiber micro-bending sensor are used as the sensing unit, it is a point-like sensing mode, and the optical cables need to be connected between the sensing units, and the optical fibers need to be connected to the fiber grating sensor and the fiber micro-bending sensor after the optical cables are broken, and when the fence length is long and the sensing points are many, the optical fiber cable needs to be fused many times. SUMMARY

[0006] In view of the above problems, the present application provides an optical cable deformation device for deformation fence, which comprises a shell, the shell comprises a box body and a box cover clamped with the box body, and a fence deformation conversion structure and an optical cable deformation structure are arranged in the inner cavity of the box body.

[0007] The fence shape deformation conversion structure comprises pulley one, pulley two, optical cable tensioning wheel one and fence shape deformation pull rope, the pulley one and the pulley two are movably connected with the box body through a round rod, the middle part of the optical cable tensioning wheel one is movably connected with a limiting rod one, the middle part of the end of the limiting rod one away from the optical cable tensioning wheel one is movably sleeved with a positioning rod, the positioning rod is fixedly connected with the inner wall of the box body, the end of the limiting rod one is fixedly connected with the box body through a spring one, the fence shape deformation pull rope is wound on the pulley one, the pulley two and the optical cable tensioning wheel one.

[0008] The optical cable shape deformation structure comprises two optical cable positioning clamps fixedly connected with the box body, an optical cable tensioning wheel two located on the inner side of the two optical cable positioning clamps and a sensing optical cable, the sensing optical cable is clamped with the optical cable positioning clamp, the sensing optical cable is wound on the optical cable tensioning wheel two and the optical cable tensioning wheel one, the middle part of the optical cable tensioning wheel two is movably connected with a limiting rod two, the middle part of the end of the limiting rod two away from the optical cable tensioning wheel two is movably sleeved with another positioning rod fixedly connected with the inner wall of the box body, and the end of the limiting rod two is fixedly connected with the box body through a spring two.

[0009] The two ends of the fence shape deformation pull rope and the two ends of the sensing optical cable are located on the outer side of the box body, and the fence shape deformation pull rope is movably connected with the side wall of the box body.

[0010] Preferably, the limiting rod one and the limiting rod two are of the same size, the limiting rod one and the limiting rod two are L-shaped, the limiting rod one comprises a horizontal rod and a vertical rod fixedly connected with the bottom of one end of the horizontal rod, the positioning rod is movably sleeved with the middle part of the horizontal rod, and the spring one and the spring two are fixedly connected with the middle part of the horizontal rod.

[0011] Preferably, the outer diameter of the optical cable tensioning wheel two is larger than that of the optical cable tensioning wheel one.

[0012] Preferably, the optical cable positioning clamp comprises an optical cable clamping groove fixedly connected with the box body and an optical cable wire pressing clamp fixedly connected with the box body, and the side of the optical cable wire pressing clamp close to the optical cable clamping groove is semicircular.

[0013] Preferably, the sensing optical cable and the fence shape deformation pull rope are located on the two sides of the optical cable tensioning wheel one.

[0014] The present application has the following beneficial effects:

[0015] The optical cable deformation device for the deformation fence can convert the tension change into the bending state change of the optical cable, when the device is used as a sensing unit in the deformation fence engineering, a plurality of sensing units can be connected in series through one optical cable, the optical cable does not need to be broken, and the optical cable can be directly installed to the sensing unit, thereby avoiding the optical fiber cable fusion when the plurality of sensing units are connected in series.

[0016] The application provides a cable deformation device for deformation fence, which is simple in structure, low in cost, passive, and free of power supply, and is suitable for field installation. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and all other drawings obtained by those skilled in the art without creative effort based on these drawings also belong to the protection scope of the present application.

[0018] Figure 1 Structure of the application using schematic diagram

[0019] Figure 2 Stress schematic diagram of the deformation fence when encountering intrusion

[0020] Figure 3 Amplified schematic diagram of the structure of the application

[0021] Figure 4 Structure of the application Figure 3 Explosion schematic diagram

[0022] Figure 5 Connection structure schematic diagram of the deformation fence detection system

[0023] Figure 6 Second schematic diagram of the structure of the application

[0024] In the figure: 1, outer shell; 2, deformation pull rope fixing part; 3, fence deformation pull rope; 4, base; 5, mounting rod; 6, sensing optical cable; 7, box body; 8, box cover; 9, pulley one; 10, pulley two; 11, optical cable tensioning wheel one; 12, round rod; 13, limiting rod one; 15, spring one; 16, positioning rod; 17, limiting rod two; 18, optical cable tensioning wheel two; 19, spring two; 20, optical cable wire pressing clamp; 21, optical cable clamping groove. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application.

[0026] The application provides a cable deformation device for a deformation fence, which comprises a shell 1, the shell 1 comprises a box body 7 and a box cover 8 clamped with the box body 7, in an embodiment of the application, the box body 7 is uniformly provided with clamping grooves, the inner side of the box cover 8 is uniformly fixedly connected with clamping columns matched with the clamping grooves, and the joint of the box cover 8 and the box body 7 is sealed by glue pouring after clamping, so that the influence of the external environment on the devices in the shell 1 is reduced.

[0027] Please refer to Figure 3 and Figure 4 , the inner cavity of the box body 7 is provided with a fence deformation conversion structure and a cable deformation structure.

[0028] The fence deformation conversion structure comprises pulley one 9, pulley two 10, cable tensioning wheel one 11 and fence deformation pull rope 3, the middle part of the inner cavities of the pulley one 9 and the pulley two 10 are fixedly connected with round rods 12 by welding or the like, the round rods 12 are movably connected with the inner wall of the box body 7, the pulley one 9 and the pulley two 10 are located on the two sides of the inner cavity of the box body 7, the cable tensioning wheel one 11 is located on the inner side of the pulley one 9 and the pulley two 10, the middle part of the cable tensioning wheel one 11 is movably connected with a limiting rod one 13, the top end of the limiting rod one 13 is fixedly connected with the box body 7 through a spring one 15, the middle part of the end, away from the cable tensioning wheel one 11, of the limiting rod one 13 is movably sleeved with a positioning rod 16, and the end of the positioning rod 16 is fixedly connected with the inner wall of the box body 7 by welding or the like, the position of the cable tensioning wheel one 11 can be changed through the arrangement of the positioning rod 16 and the spring one 15, and the rebound force of the spring one 15 can drive the cable tensioning wheel one 11 to reset.

[0029] The fence deformation pull rope 3 is wound on the pulley one 9, the pulley two 10 and the cable tensioning wheel one 11, in an embodiment of the application, the fence deformation pull rope 3 is in contact with the top of the pulley one 9 and the pulley two 10, the fence deformation pull rope 3 is in contact with the bottom of the cable tensioning wheel one 11, the two ends of the fence deformation pull rope 3 are both penetrated through the side wall of the box body 7 and extended to the outside of the box body 7, and the fence deformation pull rope 3 is movably connected with the side wall of the box body 7.

[0030] Through the arrangement of the parts in the above fence deformation conversion structure, when the end of the fence deformation pull rope 3 is deformed, the fence deformation pull rope 3 can drive the cable tensioning wheel one 11 to move.

[0031] The cable deformation structure comprises two cable positioning clamps fixedly connected with the box body 7 by welding or the like, a cable tensioning wheel two 18 and a sensing cable 6 located inside the two cable positioning clamps, the sensing cable 6 is clamped with the cable positioning clamps, the end of the sensing cable 6 also penetrates the side wall of the box body 7 and extends to the outside of the box body 7, the sensing cable 6 is movably connected with the side wall of the box body 7, the sensing cable 6 is wound on the cable tensioning wheel two 18 and the cable tensioning wheel one 11, in an embodiment of the present application, the bottom of the cable tensioning wheel two 18 is in contact with the top of the sensing cable 6, the sensing cable 6 is in contact with the top of the cable tensioning wheel one 11, and the cable positioning clamps are located below the top of the cable tensioning wheel two 18 and the bottom of the cable tensioning wheel one 11.

[0032] The middle part of the cable tensioning wheel two 18 is movably connected with a limiting rod two 17, the middle part of the end of the limiting rod two 17 away from the cable tensioning wheel two 18 is movably sleeved with another limiting rod 16 fixedly connected with the inner wall of the box body 7, and the end of the limiting rod two 17 is fixedly connected with the box body 7 through a spring two 19, so that the position of the cable tensioning wheel two 18 can be changed.

[0033] Through the arrangement of the above-mentioned cable deformation structure, when the cable tensioning wheel one 11 moves, the cable tensioning wheel one 11 moves through the sensing cable 6 in contact with it, the part of the sensing cable 6 located in the shell 1 can be deformed, and the rebounding force of the spring two 19 can push the sensing cable 6 to reset.

[0034] Please refer to Figure 6 , the limiting rod one 13 and the limiting rod two 17 are of the same size, the limiting rod one 13 and the limiting rod two 17 are L-shaped, the limiting rod one 13 comprises a horizontal rod and a vertical rod fixedly connected with the bottom of one end of the horizontal rod, the limiting rod 16 is movably sleeved with the middle part of the horizontal rod, and the spring one 15 and the spring two 19 are fixedly connected with the middle part of the horizontal rod.

[0035] Please refer to Figure 3 and Figure 4 , the outer diameter of the cable tensioning wheel two 18 is greater than the outer diameter of the cable tensioning wheel one 11, the outer diameter of the cable tensioning wheel two 18 is more than 1.5 times of the outer diameter of the cable tensioning wheel one 11, the cable positioning clamp comprises a cable clamping groove 21 fixedly connected with the box body 7 and a cable wire pressing clamp 20 fixedly connected with the box body 7, and the side close to the cable clamping groove 21 of the cable wire pressing clamp 20 is semicircular, through the arrangement of the cable positioning clamp, the part of the sensing cable 6 located in the shell 1 can be fixed, and the deformation of this part of the sensing cable 6 is facilitated.

[0036] The use embodiment of the device is as follows:

[0037] Please refer to Figure 1 and Figure 2The device is used in the outdoor cable with the outer diameter of 3mm-10mm as the sensing cable 6, and the iron wire or steel wire is usually selected as the fence deformation pull rope 3, and the diameter of the second cable tensioning wheel 18 is twice of the diameter of the first cable tensioning wheel 11.

[0038] The device is uniformly fixed on the installation rod 5 of the deformation fence from top to bottom, and the end of the tensioned fence deformation pull rope 3 is fixed together with another installation rod 5 on the deformation fence through the deformation pull rope fixing part 2, so that the situation of installing one deformation device between two deformation pull rope fixing parts 2 is formed on the deformation fence, the distance between the adjacent two deformation pull ropes in the vertical direction is 10cm-30cm, the distance between the installation rods 5 on the deformation fence is 5m-10m, the installation rod 5 is connected through the base 4, and all the cable deformation devices on the deformation fence are used in series by one sensing cable 6, and the cable bending sensor P-OTDR is connected at the end of the sensing cable, the P-OTDR can not only detect the change of the bending state of the sensing cable, but also can detect the position of the change of the bending state of the sensing cable (the fiber length to the P-OTDR). Accordingly, the deformation fence system detects the activity of the human or animal invading the fence and the invading position.

[0039] Finally, it should be noted that the electrical components involved in the present application can be purchased on the market, and are prior art. The above examples are only used to illustrate the technical solutions of the present application, but not to limit them. Although the present application has been described in detail with reference to the foregoing examples, those skilled in the art will understand that the technical solutions recorded in the foregoing examples can be modified or some technical features can be replaced by equivalent ones. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A fiber optic cable deformer device for a deformable fence, comprising a housing (1), characterized in that, The outer shell (1) includes a box body (7) and a box cover (8) that snaps into the box body (7). The box body (7) is provided with slots evenly. The inner side of the box cover (8) is evenly fixedly connected with a pin that matches the slot. The inner cavity of the box body (7) is provided with a fence deformation conversion structure and an optical cable deformation structure. The fence deformation conversion structure includes pulley one (9), pulley two (10), optical cable tensioning wheel one (11) and fence deformation pull rope (3). Pulley one (9) and pulley two (10) are movably connected to the box body (7) through round rod (12). The middle part of the optical cable tensioning wheel one (11) is movably connected to a limiting rod one (13). The middle part of the limiting rod one (13) away from the optical cable tensioning wheel one (11) is movably sleeved with a positioning rod (16). The positioning rod (16) is fixedly connected to the inner wall of the box body (7). The end of the limiting rod one (13) is fixedly connected to the box body (7) through spring one (15). The fence deformation pull rope (3) is wound around pulley one (9), pulley two (10) and optical cable tensioning wheel one (11). The optical cable deformation structure includes two optical cable positioning clamps fixedly connected to the housing (7), an optical cable tensioning wheel two (18) located inside the two optical cable positioning clamps, and a sensing optical cable (6). The sensing optical cable (6) is snapped into the optical cable positioning clamps. The sensing optical cable (6) is wound around the optical cable tensioning wheel two (18) and the optical cable tensioning wheel one (11). The middle part of the optical cable tensioning wheel two (18) is movably connected to the limiting rod two (17). The middle part of the limiting rod two (17) away from the optical cable tensioning wheel two (18) is movably sleeved with another positioning rod (16) fixedly connected to the inner wall of the housing (7). This end of the limiting rod two (17) is fixedly connected to the housing (7) through the spring two (19). The diameter of the optical cable tensioning wheel two (18) is twice the diameter of the optical cable tensioning wheel one (11). Both ends of the fence deformation pull rope (3) and both ends of the sensing optical cable (6) are located on the outside of the box (7), and the fence deformation pull rope (3) is movably connected to the side wall of the box (7).

2. The optical cable deformer device for a deformable fence according to claim 1, characterized in that, The limiting rod one (13) and the limiting rod two (17) are the same size. The limiting rod one (13) and the limiting rod two (17) are L-shaped. The limiting rod one (13) includes a horizontal rod and a vertical rod fixedly connected to the bottom of one end of the horizontal rod. The positioning rod (16) is movably sleeved with the middle of the horizontal rod. The spring one (15) and the spring two (19) are fixedly connected to the middle of the horizontal rod.

3. The optical cable deformer device for a deformable fence according to claim 1, characterized in that, The optical cable positioning clamp includes an optical cable slot (21) fixedly connected to the box body (7) and an optical cable clamp (20) fixedly connected to the box body (7), and the side of the optical cable clamp (20) near the optical cable slot (21) is semi-circular.

4. The optical cable deformer device for a deformable fence according to claim 1, characterized in that, The sensing optical cable (6) and the fence deformation pull rope (3) are located on both sides of the optical cable tensioning wheel (11).

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