Power transmission cable with pressure sensing function

Abstract

The invention relates to the technical field of cables, and discloses a power transmission cable with a pressure sensing function, which comprises a support module, a wire, a protective sleeve, a pressure transmission module and a pressure sensing module, the supporting module comprises a triangular main body, a wire hole, a circular supporting part, a supporting rod and a circular connecting part; the wire is arranged in the wire hole; the supporting module is fixedly arranged on the inner side of the protective sleeve; the number of the pressure transmitting modules is three, the pressure transmitting modules are arranged at the positions corresponding to the three side faces of the triangular body respectively, the outward ends of the pressure transmitting modules abut against the protective sleeve, the inward ends of the pressure transmitting modules are arranged on the side faces of the two adjacent circular supporting parts in a lap joint mode, and the inward ends of the pressure transmitting modules and the side faces of the triangular body form a containing cavity. A pressure sensing module is arranged in the accommodating cavity; when bearing an external force, the pressure transmitting module deforms and transmits the force to the pressure sensing module. The pressure borne by the cable can be measured in real time, problems can be found in time, the sensitivity is high and adjustable, and the applicability is enhanced.

Description

Technical Field

[0001] This invention relates to the field of cable technology, and in particular to a power transmission cable with pressure sensing function. Background Technology

[0002] The core function of existing power transmission cables is focused on power transmission, but under harsh conditions such as heavy loads, the mechanical stress they bear is significantly amplified. This can lead to cable structural damage, such as breakage, outer sheath damage, or even conductor exposure, resulting in safety hazards and operational failures. Furthermore, current power transmission cables generally lack integrated pressure sensing capabilities, making it impossible to effectively monitor the real-time mechanical loads on critical parts of the cable (such as pressure-prone points and joints). This lack of monitoring makes it difficult for maintenance personnel to detect sudden abnormal pressure events (such as construction pressure or foreign object impacts) in a timely manner, hindering intervention measures in the early stages of damage occurrence or escalation. Therefore, providing real-time, in-situ pressure status sensing and monitoring capabilities for critical parts of power transmission cables, while ensuring efficient power transmission, is currently a research hotspot. Summary of the Invention

[0003] To address the aforementioned technical problems, the present invention provides a power transmission cable with pressure sensing function, comprising: a support module, a conductor, a protective sleeve, a pressure transmission module, and a pressure sensing module; The support module includes a triangular main body, a wire hole, a circular support part, a support rod, and a circular connecting part; the triangular main body is coaxially arranged with the wire hole located in the middle; there are three circular support parts, which are respectively arranged at the three vertices of the triangular main body; each circular support part has a support rod at its top, and each support rod has a circular connecting part at its top; the protective sleeve is a hollow cylinder, and the inner side of the protective sleeve has a limiting groove that corresponds to the position and size of the circular connecting part; the wire is arranged inside the wire hole; the support module is fixedly arranged inside the protective sleeve. The pressure transmission module consists of three modules, which are respectively located on the three sides of the triangular body. The outward end of the pressure transmission module abuts against the protective sleeve, and the inward end overlaps the sides of two adjacent circular support parts, forming a receiving cavity with the sides of the triangular body. A pressure sensing module is installed inside the receiving cavity. When subjected to external force, the pressure transmission module deforms and transmits the force to the pressure sensing module.

[0004] Optionally, the pressure transmission module includes an abutment block, an S-shaped beam, a cantilever beam, and a circular part connected sequentially from top to bottom; the abutment block has a curved surface on the outward side and a flat surface on the inward side; the cantilever beam is parallel to the side of the triangular main body, and a circular part is provided at the bottom of both sides of the cantilever beam; the circular support part is provided with a matching sized limiting groove at the position of the circular part, and the circular part is located inside the limiting groove.

[0005] Optionally, a second connecting part is provided between the S-shaped beam and the cantilever beam; the second connecting part is located at the middle position of the cantilever beam, and the second connecting part is a rectangular block with a lateral dimension smaller than the lateral dimension of the cantilever beam.

[0006] Optionally, the cross-section of the triangular main body is an equilateral triangle; the pressure transmission module is integrally formed.

[0007] Optionally, the pressure-sensing module includes a rectangular block, a pressure-sensing optical fiber, a circular slider, and an elastic layer; the rectangular block has an optical fiber slot on its upper side and a circular slider on its lower side; the pressure-sensing optical fiber is covered by an elastic layer and placed in the optical fiber slot, and the portion of the elastic layer that extends beyond the optical fiber slot abuts against the cantilever beam; the cross-sectional area of ​​the optical fiber slot is larger than the cross-sectional area of ​​the elastic layer.

[0008] Optionally, the elastic modulus of the support module is greater than that of the pressure transmission module; the elastic modulus of the support module is greater than that of the protective sleeve.

[0009] Optionally, the elastic modulus of the elastic layer is less than the elastic modulus of the pressure transmission module.

[0010] Optionally, the elastic layer is in the shape of a hollow cylinder.

[0011] Optionally, each of the three sides of the triangular body is provided with a circular groove; the size of the circular groove matches the size of the circular slider; there are multiple circular grooves and they are located at different positions in the middle and on both sides of the sides of the triangular body, for adjusting the connection position of the pressure-sensing module.

[0012] Optionally, the rectangular block may be made of the same material as the triangular body.

[0013] Compared with the prior art, the present invention achieves the following technical effects: 1. Power transmission cables with pressure sensing function have a simple structure and strong applicability. Each module is manufactured separately, and support modules, protective sleeves, pressure transmission modules, and pressure sensing modules with different elastic moduli can be replaced according to actual needs to increase the range of applications. Power transmission cables can measure the pressure they bear in real time and detect problems in a timely manner.

[0014] 2. The cantilever beam of the pressure transmission module, combined with the different settings of the pressure sensing module, can adjust the pressure sensitivity and enhance its applicability.

[0015] 3. The overall structure adopts a topology of equilateral triangular support modules and three sets of distributed pressure transmission / sensing units, achieving synchronous monitoring of the cable's circumferential pressure through a 120° symmetrical layout. The pressure transmission module integrates a composite structure of S-beams and cantilever beams, combined with an elastic modulus gradient design, to improve pressure detection sensitivity. The support module has reserved mounting positions for temperature measurement, enabling coordinated monitoring of pressure and temperature parameters. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a power transmission cable with pressure sensing function according to an embodiment of the present invention; Figure 2 A schematic diagram of the cross-section of a power transmission cable with pressure sensing function provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a support module in a power transmission cable with pressure sensing function according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a pressure transmission module in a power transmission cable with pressure sensing function according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a pressure sensing module in a power transmission cable with pressure sensing function according to an embodiment of the present invention; Figure 6 This is a stress distribution diagram of a power transmission cable with pressure sensing function under external force, provided as an embodiment of the present invention.

[0017] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0019] like Figures 1-6 As shown, an embodiment of the present invention provides a power transmission cable with pressure sensing function, including: a support module 1, a conductor 2, a protective sleeve 3, a pressure transmission module 4, and a pressure sensing module 5; The support module 1 includes a triangular body 11, a wire hole 12, a circular support part 13, a support rod 14, and a circular connecting part 15; the triangular body 11 and the wire hole 12 are coaxially arranged, with the wire hole 12 located in the middle; there are three circular support parts 13, which are respectively arranged at the three apex corners of the triangular body 11; each circular support part 13 has a support rod 14 at its top, and each support rod 14 has a circular connecting part 15 at its top; the protective sleeve 3 is a hollow cylinder, and the inner side of the protective sleeve 3 is provided with a limiting groove that corresponds to the position and size of the circular connecting part 15; The wire 2 is disposed inside the wire hole 12; the support module 1 is fixedly disposed inside the protective sleeve 3; The pressure transmission module 4 consists of three modules, which are respectively located on the three sides of the triangular body 11. The outward end of the pressure transmission module 4 abuts against the protective sleeve 3, and the inward end overlaps the sides of two adjacent circular support parts 13, forming a receiving cavity with the sides of the triangular body 11. A pressure sensing module 5 is provided in the receiving cavity. When subjected to external force, the pressure transmission module 4 deforms and transmits the force to the pressure sensing module 5.

[0020] Optionally, the cross-section of the triangular body 11 is an equilateral triangle.

[0021] Optionally, the pressure transmission module 4 includes an abutment block 41, an S-shaped beam 42, a cantilever beam 43, and a circular part 44 connected sequentially from top to bottom; the abutment block 41 has a curved surface on the outward side (the curvature matches the protective sleeve 3), and a flat surface on the inward side; the cantilever beam 43 is parallel to the side of the triangular main body 11, and a circular part 44 is provided at the bottom of both sides of the cantilever beam 43; the circular support part 13 is provided with a matching limiting groove 16 at the position of the circular part 44, and the circular part 44 is located inside the limiting groove 16.

[0022] Optionally, a first connecting part 45 is provided between the abutting block 41 and the S-shaped beam 42, and the first connecting part 45 is a rectangular block with a lateral dimension smaller than that of the abutting block 41.

[0023] Optionally, a second connecting part 46 is provided between the S-shaped beam 42 and the cantilever beam 43; the second connecting part 46 is located in the middle of the cantilever beam 43, and the second connecting part 46 is a rectangular block with a lateral dimension much smaller than the lateral dimension of the cantilever beam 43 (such as a size ratio of 1:6-1:10).

[0024] Optionally, the pressure transmission module 4 is integrally formed.

[0025] Optionally, the pressure-sensing module 5 includes a rectangular block 51, a pressure-sensing optical fiber 52, a circular slider 53, and an elastic layer 54. The rectangular block 51 has an optical fiber optic slot on its upper side and a circular slider 53 on its lower side. The pressure-sensing optical fiber 52 is covered by the elastic layer 54 and placed within the optical fiber optic slot. The portion of the elastic layer 54 extending beyond the optical fiber optic slot abuts against the cantilever beam 43. The cross-sectional area of ​​the optical fiber optic slot is larger than that of the elastic layer 54. When the pressure exceeds the range of the pressure-sensing optical fiber 52, the elastic layer 54 is completely compressed into the optical fiber optic slot, and the cantilever beam 43 directly contacts the upper surface of the rectangular block 51, providing a limiting and protective function.

[0026] Optionally, the rectangular block 51 and the circular slider 53 are made of the same material and are integrally formed.

[0027] Optionally, the rectangular block 51 is made of the same material as the triangular body 11 (support module 1).

[0028] Optionally, the elastic layer 54 is a hollow cylinder, with the outer diameter matching the size of the optical fiber cavity and the inner diameter matching the size of the pressure-sensitive optical fiber 52.

[0029] Optionally, the elastic modulus of the support module 1 is greater than that of the pressure transmission module 4; the elastic modulus of the support module 1 is greater than that of the protective sleeve 3.

[0030] Optionally, the elastic modulus of the elastic layer 54 is less than the elastic modulus of the pressure transmission module 4.

[0031] Optionally, each of the three sides of the triangular body 11 is provided with a circular groove 17; the size of the circular groove 17 matches the size of the circular slider 53; there are multiple circular grooves 17, which are located at different positions in the middle and on both sides of the sides of the triangular body 11, for adjusting the connection position of the pressure-sensing module 5. The position of the pressure-sensing module 5 is set according to the sensitivity requirements. When under pressure, the deformation at the middle position is the largest, so the sensitivity is the highest; the farther away from the middle position, the smaller the deformation and the lower the sensitivity.

[0032] Optionally, it also includes a temperature measuring module (not shown), which includes a rectangular block 51, a temperature measuring fiber, and a circular slider 53; the rectangular block 51 has a fiber optic slot on its upper side and a circular slider 53 on its lower side; the temperature measuring fiber is placed in the fiber optic slot; the temperature measuring module is located at a non-load-bearing position on the side of the triangular main body 11.

[0033] Optionally, the support module 1 and the pressure transmission module 4 are arranged in an array along the axial direction of the conductor 2, with hollow elastic columns of matching size provided at intervals to facilitate cable bending and expand the range of use.

[0034] Optionally, the support module 1 may be made of rigid plastic, PPA with added steel wire, or the like.

[0035] Optionally, the cable 2 may be a gold, silver, copper, aluminum, or alloy conductor.

[0036] Optionally, the protective sleeve 3 is made of an insulating and flame-retardant material, such as halogen-free low-smoke polyolefin.

[0037] Optionally, the protective sleeve 3 is filled with an elastic filling layer, an inert gas, or a flame-retardant liquid.

[0038] The installation process of a power transmission cable with pressure sensing function includes: installing the conductor 2 to the support module 1, installing the support module 1 to the protective sleeve 3, installing the pressure transmission module 4 to the support module 1, and passing the pressure sensing module 5 through the designated circular groove 17.

[0039] The calibration process for power transmission cables with pressure sensing capabilities includes: Step 1: Install the power transmission cable with pressure sensing function to the press machine with controllable force magnitude and direction, and connect the pressure sensing fiber to the data analysis module; Step 2: Apply standard forces of different directions and magnitudes to the power transmission cable and collect the force data of the pressure-sensing optical fiber; Step 3: Establish the mapping information of standard force, force direction, and force data. Obtain the correspondence between force data and standard force and force direction through repeated training (neural network model, etc.).

[0040] The working principle of power transmission cables with pressure sensing function: The pressure-sensing fiber 52 is an FBG fiber, which contains an array of pressure-sensing gratings (each grating has a different reflected wavelength to distinguish different positions). When pressure is applied, the grating spacing changes, and the corresponding reflected wavelength also changes. Pressure is measured based on the wavelength change. The data analysis module includes a demodulator, processor, etc., which can analyze the detected wavelength changes. Figure 6 As shown, when the power transmission cable is subjected to force, the force is transmitted to the pressure sensing module 5 through the pressure transmission module 4, causing the pressure sensing module 5 to deform.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A power transmission cable with pressure sensing function, comprising: Support module, wires, protective sleeve, pressure transmission module, and pressure sensing module; The support module includes a triangular main body, a wire hole, a circular support part, a support rod, and a circular connecting part; the triangular main body is coaxially arranged with the wire hole located in the middle; there are three circular support parts, which are respectively arranged at the three vertices of the triangular main body; each circular support part has a support rod at its top, and each support rod has a circular connecting part at its top; the protective sleeve is a hollow cylinder, and the inner side of the protective sleeve has a limiting groove that corresponds to the position and size of the circular connecting part; the wire is arranged inside the wire hole; the support module is fixedly arranged inside the protective sleeve. The pressure transmission module consists of three modules, which are respectively located on the three sides of the triangular body. The outward end of the pressure transmission module abuts against the protective sleeve, and the inward end overlaps the sides of two adjacent circular support parts, forming a receiving cavity with the sides of the triangular body. A pressure sensing module is installed inside the receiving cavity. When subjected to external force, the pressure transmission module deforms and transmits the force to the pressure sensing module.

2. The power transmission cable as described in claim 1, characterized in that, in, The pressure transmission module includes an abutment block, an S-shaped beam, a cantilever beam, and a circular part connected sequentially from top to bottom; the abutment block has a curved surface on the outward side and a flat surface on the inward side; the cantilever beam is parallel to the side of the triangular main body, and a circular part is provided at the bottom of both sides of the cantilever beam; the circular support part is provided with a matching sized limiting groove at the position of the circular part, and the circular part is located inside the limiting groove.

3. The power transmission cable as described in claim 2, characterized in that, in, A second connecting part is provided between the S-shaped beam and the cantilever beam; the second connecting part is located in the middle of the cantilever beam, and the second connecting part is a rectangular block with a lateral dimension smaller than that of the cantilever beam.

4. The power transmission cable as described in claim 3, characterized in that, in, The cross-section of the triangular main body is an equilateral triangle; the pressure transmission module is integrally formed.

5. The power transmission cable as described in claim 4, characterized in that, in, The pressure-sensing module includes a rectangular block, a pressure-sensing optical fiber, a circular slider, and an elastic layer. The rectangular block has an optical fiber slot on its upper side and a circular slider on its lower side. The pressure-sensing optical fiber is covered by an elastic layer and placed inside the optical fiber slot. The portion of the elastic layer that extends beyond the optical fiber slot abuts against the cantilever beam. The cross-sectional area of ​​the optical fiber slot is larger than the cross-sectional area of ​​the elastic layer.

6. The power transmission cable as described in claim 5, characterized in that, in, The elastic modulus of the support module is greater than that of the pressure transmission module; the elastic modulus of the support module is greater than that of the protective sleeve.

7. The power transmission cable as described in claim 6, characterized in that, in, The elastic modulus of the elastic layer is less than that of the pressure transmission module.

8. The power transmission cable as described in claim 7, characterized in that, in, The elastic layer is in the shape of a hollow cylinder.

9. The power transmission cable as described in claim 8, characterized in that, in, The three sides of the triangular body are provided with circular grooves; the size of the circular grooves matches the size of the circular slider; there are multiple circular grooves and they are located at different positions in the middle and on both sides of the sides of the triangular body, for adjusting the connection position of the pressure sensing module.

10. The power transmission cable as described in claim 9, characterized in that, in, The rectangular block is made of the same material as the triangular main body.

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