CN216957550U - Shock-measuring type composite cable - Google Patents

Abstract

The utility model provides a shock measurement type composite cable which sequentially comprises a sheath layer, a belting layer, a fiber Bragg grating sensor and a plurality of conductors from outside to inside; the conductors are distributed on the circumference of the Bragg fiber grating sensor, and the circumferential surface layer of each conductor is provided with an insulating layer; the wrapping tape layer is wound on a plurality of conductors. According to the seismic-measuring composite cable, the Bragg fiber grating sensor is additionally arranged in the cable structure, so that when the cable is impacted by external force, the impacted position can be detected through the Bragg fiber grating sensor, and the anti-theft and rapid positioning repair of the cable are realized.

Description

Vibration measurement type composite cable

Technical Field

The utility model relates to the field of wires and cables, in particular to a vibration measuring type composite cable.

Background

The highway network is deeply spread in China, along with the further development of science and technology and economy, the highway gradually becomes intelligent, the newly-built highway is intelligently designed and constructed, and the old highway is intelligently improved.

In the laying process of the intelligent highway, the cable is used as a blood vessel and a nerve of the highway and plays a vital role in the intelligence of the highway. Through intelligent transformation, unmanned management can be comprehensively realized on future expressways. Therefore, the cable for the intelligent highway needs to have higher reliability, and once the cable is damaged by human or natural external force, the cable needs to be quickly recovered, and obviously, the function of quickly positioning faults is difficult to realize by a common cable.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a seismic composite cable in response to at least one of the above-mentioned problems.

The utility model provides a shock measurement type composite cable which sequentially comprises a sheath layer, a belting layer, a fiber Bragg grating sensor and a plurality of conductors from outside to inside;

the conductors are distributed on the circumference of the Bragg fiber grating sensor, and the circumferential surface layer of each conductor is provided with an insulating layer; the wrapping tape layer is wound on a plurality of conductors.

In one embodiment, the conductor and the fiber Bragg grating sensor are assembled through a stranding and cabling process, and the stranding pitch-diameter ratio is 20-30.

In one embodiment, the insulating layer is made of cross-linked polyethylene irradiated by ultraviolet light.

In one embodiment, the material of the sheath layer comprises polyethylene and an ant-proof agent.

In one embodiment, the insulating sheath layer is arranged between the belting layer and the sheath layer.

In one embodiment, the isolation sleeve layer is made of nylon.

In one embodiment, the cable further comprises an armor layer, wherein the armor layer is arranged between the isolation sleeve layer and the sheath layer; the armor layer is made of stainless steel.

In one embodiment, the thickness ratio of the armor layer to the sheath layer is 1/6-1/4.

In one embodiment, the conductor is a solid copper conductor.

In one embodiment, the space between the cavity wall of the inner cavity formed by the conductors and the outer surface of the fiber Bragg grating sensor is 1-5 mm.

The technical scheme provided by the embodiment of the utility model has the following beneficial technical effects:

according to the vibration measurement type composite cable provided by the utility model, the Bragg fiber grating sensor is additionally arranged in the cable structure, so that when the cable is impacted by external force, the impacted position can be detected through the Bragg fiber grating sensor, and the anti-theft and quick positioning repair of the cable are realized.

Additional aspects and advantages of the present invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic cross-sectional view of a seismic composite cable according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of another embodiment of the seismic composite cable of the present invention;

fig. 3 is a schematic cross-sectional view of a seismic composite cable according to another embodiment of the present invention.

Description of reference numerals:

100-Bragg fiber grating sensor, 200-conductor, 300-insulating layer, 400-belting layer, 500-sheathing layer, 600-isolation sheathing layer and 700-armor layer.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Possible embodiments of the utility model are given in the figures. The utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. The embodiments described by way of reference to the drawings are illustrative for the purpose of providing a more thorough understanding of the present disclosure and are not to be construed as limiting the present invention. Furthermore, if a detailed description of known technologies is not necessary for illustrating the features of the present invention, such technical details may be omitted.

It will be understood by those skilled in the relevant art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It is to be understood that the term "and/or" as used herein is intended to include all or any and all combinations of one or more of the associated listed items.

The technical solution of the present invention and how to solve the above technical problems will be described in detail with specific examples.

The seismic-measuring composite cable provided by the utility model comprises a sheath layer 500, a belting layer 400, a fiber bragg grating sensor 100 and a plurality of conductors 200 from outside to inside in sequence as shown in figure 1; conductors 200 are distributed on the circumference of the fiber bragg grating sensor 100, and the circumferential surface layer of each conductor is provided with an insulating layer 300; the tape layer is wound around several conductors 200. Optionally, in one embodiment, conductor 200 is a solid copper conductor. The solid conductor has low resistance value, thereby reducing the loss of electric energy in the transmission process.

The Bragg fiber grating sensor can be used as a fiber sensor, has the advantages of electromagnetic interference resistance, light weight, small volume, corrosion resistance and the like, is also made of transparent glass fiber and is arranged coaxially with a conductor, mechanical vibration can be converted into photoelectric signals under the condition of vibration, a signal receiver arranged at one end of a cable receives the photoelectric signals to determine the position of the mechanical vibration, specifically, a time function of interference phase difference delta phi of one path of signals can be directly obtained by performing series expansion on the intensity function of the returned interference signal and performing approximation on the intensity function in the case of small signals, the error between the intensity of the approximated signal and the actual intensity of the signal can be ignored, and the accurate notch point spectrum intensity distribution of the vibration frequency can be obtained by performing Fourier transformation on the time function, therefore, a trapped wave point frequency point is obtained, and the vibration position on the Bragg fiber grating sensor is determined.

According to the vibration measurement type composite cable provided by the utility model, the Bragg fiber grating sensor is additionally arranged in the cable structure, so that when the cable is impacted by external force, the impacted position can be detected through the Bragg fiber grating sensor, and the anti-theft and quick positioning repair of the cable are realized.

Optionally, in an embodiment of the present application, the conductor 200 and the bragg fiber grating sensor 100 are assembled by a stranding and cabling process, and a stranding pitch-diameter ratio is 20-30. The cabling process is a cabling process of an insulated wire core (a conductor + insulated structure) and the bragg fiber grating sensor 100, the cabling process is required to splice the insulated wire core and the bragg fiber grating sensor 100 together, and the cabling process mainly comprises the following control points:

firstly, the paying-off tension of the fiber bragg grating sensor cannot be too large, the fiber bragg grating sensor can be stretched due to the too large tension, signals transmitted by the stretched fiber bragg grating sensor are inaccurate, and the tension is generally controlled by adopting automatic paying-off equipment.

Secondly, the pitch-diameter ratio during cabling and stranding is controlled within the range of 20-30, the Bragg fiber grating sensor is easily extruded due to the fact that the pitch-diameter ratio is too small, signals transmitted by the extruded Bragg fiber grating sensor are not accurate, the cable is loose due to the fact that the pitch-diameter ratio is too large, the minimum bending radius of the cable is increased, and laying of the cable is not facilitated. Optionally, by controlling the diameter of the conductor 200 with the insulating layer 300, the space between the cavity wall of the inner cavity formed by the plurality of conductors 200 and the outer surface of the bragg fiber grating sensor 100 is 1-5 mm, so that the bragg fiber grating sensor 100 has a larger margin in bending, and inaccurate signal transmission caused by over-tensioning in bending is avoided.

Optionally, in an implementation manner of the present application, the material of the insulating layer 300 is cross-linked polyethylene irradiated by ultraviolet light. The process of ultraviolet irradiation crosslinking is adopted, and the insulating material is irradiated by ultraviolet light used in irradiation processing, so that the insulation resistance is very high, and dielectric loss in power transmission is better reduced.

Optionally, in an embodiment of the present application, the material of the sheath layer 500 includes polyethylene and an ant-proof agent. The cable can be made of high-density polyethylene materials, and the ant-proof agent is added into the materials, so that the whole cable is waterproof, and the cable can be prevented from being bitten by ants.

Optionally, in another embodiment of the present application, as shown in fig. 2, an isolation jacket layer 600 is further included, and the isolation jacket layer 600 is disposed between the belting layer 400 and the sheathing layer 500. Optionally, the isolation sleeve layer 600 is made of nylon.

Optionally, in combination with the foregoing embodiment, in another embodiment of the present application, as shown in fig. 3, further includes an armor layer 700, where the armor layer 700 is disposed between the isolation jacket layer 600 and the jacket layer 500; the armor 700 is made of stainless steel. Optionally, the thickness ratio of the armor layer 700 to the sheath layer 500 is 1/6-1/4. Armor 700 adopts stainless steel material, and this material is difficult for rustting to can bear certain pressure, avoid general impact to survey to shake and produce the interference, can prevent effectively in addition that the mouse from stinging the cable through, play the effect of protection to inner structure. The two layers of the wrapping tape layer 400 and the isolation sleeve layer can separate the insulated wire core and the Bragg fiber grating sensor 100 from the armor layer 700, and can prevent the armor layer 700 from causing mechanical damage to the insulated wire core and the Bragg fiber grating sensor 100.

Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in this application can be interchanged, modified, combined, or eliminated. Further, other steps, measures, or schemes in various operations, methods, or flows that have been discussed in this application can be alternated, altered, rearranged, broken down, combined, or deleted. Further, the steps, measures, and schemes in the various operations, methods, and flows disclosed in the present application in the prior art can also be alternated, modified, rearranged, decomposed, combined, or deleted.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and may be performed in other orders unless explicitly stated herein. Moreover, at least a portion of the steps in the flow chart of the figure may include multiple sub-steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.

Claims (7)

1. A shock measurement type composite cable is characterized by comprising a sheath layer, a belting layer, a fiber Bragg grating sensor and a plurality of conductors from outside to inside in sequence;

the conductors are distributed on the circumferential direction of the Bragg fiber grating sensor, and the circumferential surface layer of each conductor is provided with an insulating layer; the wrapping tape layer is wound on a plurality of conductors.

2. The seismic composite cable of claim 1, further comprising an isolation jacket layer disposed between the belting layer and the jacket layer.

3. The seismic sensing composite cable of claim 2, wherein the isolation jacket layer is made of nylon.

4. The seismic sensing type composite cable of claim 3, further comprising an armor layer disposed between the isolation jacket layer and the jacket layer; the armor layer is made of stainless steel.

5. The seismic sensing composite cable of claim 4, wherein the thickness ratio of the armor layer to the jacket layer is 1/6-1/4.

6. The seismic sensing composite cable of claim 1, wherein the conductor is a solid copper conductor.

7. The seismic survey type composite cable according to claim 1, wherein the wall of the inner cavity formed by the plurality of conductors is spaced 1-5 mm from the outer surface of the fiber bragg grating sensor.

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