CN215262041U - Sensing optical cable - Google Patents
Sensing optical cable Download PDFInfo
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- CN215262041U CN215262041U CN202121558579.5U CN202121558579U CN215262041U CN 215262041 U CN215262041 U CN 215262041U CN 202121558579 U CN202121558579 U CN 202121558579U CN 215262041 U CN215262041 U CN 215262041U
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Abstract
The application relates to a sensing optical cable which comprises an outer sheath, an adhesive layer, a sensing optical unit and a yarn reinforcement; the adhesive layer is arranged at the bottom of the outer sheath; the sensing light unit and the yarn reinforcing piece are both positioned in the outer sheath, and the yarn reinforcing piece is distributed on the outer side of the sensing light unit; the sensing optical unit comprises a loose tube and a plurality of sensing optical fibers, and the sensing optical fibers are arranged in the loose tube. The loose tube can carry out the first layer protection to the sensitization optic fibre, and the yarn reinforcement can carry out the second floor protection to the sensing optic fibre, through the yarn reinforcement, can make the sensing optical cable possess certain resistance to compression and anti side impact ability, and the oversheath can is as the third layer protection, can do further protection to the sensitization unit. The sensing optical cable is fixed through the viscose layer, not only can prevent that screw nut, buckle etc. from falling into in the track to avoid causing the incident, can make sensing optical cable laminate ground or wall well moreover, thereby can improve sensing optical cable's perception sensitivity.
Description
Technical Field
The application relates to the technical field of optical cables, in particular to a sensing optical cable.
Background
The working principle of the sensing optical fiber is that a transmitting laser emits direct-current monochromatic light waves, and the direct-current monochromatic light waves are coupled into the two-core sensing optical fiber in the forward direction and the reverse direction through the optical fiber coupler respectively to form forward and reverse loop Mach-Zehnder interference optical signals; when the sensing optical fiber is interfered by external vibration along the line, the phase change of light waves in optical fiber transmission can be caused, an optical signal phase modulation sensing signal based on double-ring Mach-Zehnder interference is formed, the optical signal phase modulation sensing signal is transmitted to a photoelectric detector through an optical fiber coupler and an optical circulator, the light intensity change of the interference optical signal is detected, and the optical fiber vibration alarm is realized.
The principle is a technology for measuring by utilizing the one-dimensional space continuity characteristic of the sensing optical fiber, any point on the length of the whole sensing optical fiber is a sensitive point, the mass measurement is realized, the detection has no blind area, the electromagnetic interference is avoided, the sensitivity is high, and the method is an ideal vibration detection means. The method can be used for intrusion detection and protection of important places such as banks, markets, government departments, military bases, missile test fields, tunnels, oil and gas pipelines and the like, and has great use value.
For example, in a tunnel, a sensing optical cable is required to monitor the vibration condition in the tunnel environment. Although the sensing optical cable used at present can perform vibration monitoring, some disadvantages still exist, for example, in the installation construction process of the sensing optical cable and in the normal operation of the sensing optical cable, some parts such as screw nuts, buckles and the like need to be used for fixing, and if the screw nuts, the buckles and the like fall into the track due to falling off, safety accidents are easily caused; in addition, in the tunnel environment, when workers carry out construction and system maintenance, tool impact and personnel kick are difficult to avoid, and the sensing optical cable has the problems of poor pressure resistance, poor resistance to side impact force and the like when facing various construction environments in the tunnel.
Therefore, a special sensing cable is required to meet the application field.
Disclosure of Invention
The embodiment of the application provides a sensing optical cable, not only possesses certain resistance to compression and anti side impact performance, and is fixed through the viscose layer moreover, does not introduce screw nut, buckle etc. can prevent during screw nut, buckle etc. from falling into the track to avoid scattered component to fall into orbital incident.
The embodiment of the application provides a sensing optical cable which comprises an outer sheath, an adhesive layer, a sensing optical unit and a yarn reinforcement; wherein the content of the first and second substances,
the adhesive layer is arranged at the bottom of the outer sheath;
the sensing light unit and the yarn reinforcement are both positioned inside the outer sheath, and the yarn reinforcement is distributed outside the sensing light unit; and the number of the first and second groups,
the sensing optical unit comprises a loose tube and a plurality of sensing optical fibers, and the sensing optical fibers are arranged in the loose tube.
In some embodiments, the loose tube of the sensing light unit is filled with ointment.
In some embodiments, the yarn reinforcement comprises at least one of aramid yarn and glass yarn.
In some embodiments, at least one rigid reinforcing member is disposed on each side of the yarn reinforcing member, and the yarn reinforcing member and the rigid reinforcing member are arranged at intervals along the length direction of the adhesive layer.
In some embodiments, the rigid reinforcement comprises at least one of steel wire and GFRP.
In some embodiments, the side of the rigid reinforcement remote from the yarn reinforcement is provided with at least one KFRP reinforcement, such that the yarn reinforcement, the rigid reinforcement and the KFRP reinforcement are arranged at intervals along the length direction of the adhesive layer.
In some embodiments, the outer sheath is in a trapezoid structure, and the adhesive layer is disposed on one of an upper bottom and a lower bottom of the trapezoid structure; in the process of the production of the composite material,
the outer sheath is of a hexagonal structure, two parallel edges of the hexagonal structure exist, and the adhesive layer is arranged on one of the two parallel edges of the hexagonal structure; in the process of the production of the composite material,
the oversheath has two limits that are parallel to each other, the viscose layer sets up on one of them in two limits that should be parallel to each other, and the tip that two limits that should be parallel to each other are close to each other passes through the arc limit and connects, and this arc limit is outwards protruding.
In some embodiments, when the outer sheath is in a trapezoid structure, a circular arc transition chamfer is formed at the joint of the bottom and the waist of the trapezoid structure;
when the outer sheath is in a hexagonal structure, an arc transition chamfer is formed at the joint of two adjacent edges of the hexagonal structure.
In some embodiments, the sensing optical cable further comprises a communication optical unit located inside the outer sheath, and the communication optical unit comprises a loose tube and a plurality of communication optical fibers disposed inside the loose tube.
In some embodiments, the communication light unit and the sensing light unit are arranged at intervals along the length direction of the adhesive layer; or the like, or, alternatively,
the communication light unit and the sensing light unit are twisted on the central reinforcement.
The beneficial effect that technical scheme that this application provided brought includes:
(1) the embodiment of the application provides a sensing optical cable, sensing optical unit's loose tube can carry out the first layer protection to its inside sensing optical fiber, the yarn reinforcement that distributes in the loose tube outside can carry out the second floor protection to sensing optical fiber, through the yarn reinforcement, can make sensing optical cable possess certain resistance to compression and anti side impact ability, prevent that the workman from being under construction, when the system maintenance, the striking of instrument, personnel play and move to cause to destroy to sensing optical cable, and the oversheath is as the third layer protection, can do further protection to the sensing optical unit that sets up in its inside.
Set up the viscose layer on the oversheath, when laying, pass through viscose layer fixed mounting on ground or wall with sensing optical cable, for through some spare parts, for example screw nut, the buckle is fixed, this application adopts the viscose layer to fix, screw nut is not introduced, the buckle etc., not only can prevent these screw nut, the buckle etc. from falling into in the track because of droing, thereby avoid scattered component to fall into orbital incident, and it is more convenient to install or dismantle, simultaneously because it is fixed through the viscose layer, can make sensing optical cable laminate ground or wall well, thereby can improve sensing optical cable's perception sensitivity.
(2) By filling the ointment, the sensing optical fiber can be ensured to sharply capture the seismic source signal.
(3) The rigid reinforcing parts with proper sizes are arranged on the two sides of the yarn reinforcing part, so that when the sensing optical cable is subjected to pressure from the upper side, the rigid reinforcing parts can effectively prevent the sensing optical cable from further deforming, the sensing optical fiber of the sensing optical unit is prevented from being subjected to external force, and the sensing optical cable has better pressure resistance.
(4) The KFRP reinforcing piece is arranged on one side, far away from the yarn reinforcing piece, of the rigid reinforcing piece, so that the strength of the sensing optical cable can be further ensured.
(5) The oversheath is the trapezium structure, and upper surface and lower surface are level and smooth, can fully with ground or wall contact, set up the viscose layer on the lower surface, can guarantee that sensing optical fiber sharply catches the seismic source signal. Meanwhile, the outer sheath is of a trapezoidal structure, the inclined planes on the two sides enable the sensing optical cable to effectively relieve the impact force from the side face, and the sensing optical cable is not easy to lift when being impacted by the side face.
(6) The oversheath is the hexagon structure, and the viscose layer sets up on one of them of two edges that are parallel to each other of hexagon structure, can be enough with ground or wall contact, can guarantee that sensing optical fiber sharply catches the seismic source signal. Meanwhile, the outer sheath is of a hexagonal structure, the inclined planes on the two sides enable the sensing optical cable to effectively relieve impact force from the side face, and the sensing optical cable is not easy to lift when being impacted by the side face.
(7) The adhesive layer is arranged on one of two parallel edges of the outer sheath, can be fully contacted with the ground or a wall surface, and can ensure that the sensing optical fiber sharply captures seismic source signals. Meanwhile, the end part of the outer sheath is an arc-shaped edge which is outwards convex, and the arc-shaped edges on the two sides enable the sensing optical cable to effectively relieve the impact force from the side surface, so that the sensing optical cable is not easy to lift when being impacted by the side surface.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of a sensing cable provided by an embodiment of the present application (two KFRP reinforcements);
FIG. 2 is a schematic cross-sectional view of a sensing cable provided by an embodiment of the present application (four KFRP strength members);
fig. 3 is a schematic cross-sectional view of a sensing optical cable provided in an embodiment of the present application (a first arrangement of a sensing optical unit and a communication optical unit);
fig. 4 is a schematic cross-sectional view of a sensing optical cable provided in an embodiment of the present application (a second arrangement of the sensing optical unit and the communication optical unit);
FIG. 5 is a schematic cross-sectional view of a sensing cable provided in an embodiment of the present application (the outer sheath has a hexagonal structure);
fig. 6 is a schematic cross-sectional view of a sensing optical cable provided in an embodiment of the present application (the end portion of the outer sheath is an arc-shaped edge).
In the figure: 1. an outer sheath; 2. an adhesive layer; 3. a sensing light unit; 30. a sensing optical fiber; 4. a yarn reinforcement; 5. a rigid reinforcement; 6. a KFRP reinforcement; 7. a communication optical unit; 70. a communication optical fiber; 8. a central stiffener.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, a sensing optical cable provided in an embodiment of the present application includes an outer sheath 1, an adhesive layer 2, a sensing optical unit 3, and a yarn reinforcement 4; the adhesive layer 2 is arranged at the bottom of the outer sheath 1, the sensing light unit 3 and the yarn reinforcing piece 4 are both positioned in the outer sheath 1, and the yarn reinforcing piece 4 is distributed on the outer side of the sensing light unit 3; the sensing optical unit 3 comprises a loose tube and a number of sensing optical fibers 30, the sensing optical fibers 30 being arranged in the loose tube.
In this embodiment, the loose tube of the sensing optical unit 3 can protect the sensing optical fiber 30 inside the loose tube by a first layer, the yarn reinforcement 4 distributed outside the loose tube can protect the sensing optical fiber 30 by a second layer, and the yarn reinforcement 4 can ensure that the sensing optical cable has certain pressure resistance and side impact resistance, so as to prevent the sensing optical cable from being damaged by impact of a tool and kicking of personnel when workers carry out construction and system maintenance, and the outer sheath 1 serves as a third layer for protection, so that the sensing optical unit 3 arranged inside the outer sheath can be further protected.
In addition, set up viscose layer 2 on outer sheath 1, when laying, pass through viscose layer 2 fixed mounting on ground or wall with sensing optical cable, for through some spare parts such as screw nut, the buckle is fixed, this application adopts viscose layer 2 to fix, screw nut is not introduced, the buckle etc., not only can prevent these screw nut, the buckle etc. falls into in the track because of droing, thereby avoid scattered component to fall into orbital incident, and it is more convenient to install or dismantle, simultaneously because it is fixed through viscose layer 2, can make sensing optical cable laminate ground or wall well, thereby can improve sensing optical cable's perception sensitivity.
In some preferred embodiments, the loose tube of the sensor optical unit 3 is filled with ointment, which can ensure that the sensor optical fiber 30 can sharply capture the seismic source signal.
In some preferred embodiments, the yarn reinforcement 4 may be at least one selected from aramid yarn and glass yarn, and it should be noted that other yarn materials commonly used may be used in addition to the aramid yarn and the glass yarn.
Referring to fig. 1, in some preferred embodiments, at least one rigid reinforcing member 5 is disposed on each side of the yarn reinforcing member 4, and the yarn reinforcing member 4 and the rigid reinforcing member 5 are spaced apart along the length of the adhesive layer 2. Typically, the diameter of the rigid stiffener 5 is larger than the diameter of all the sensing fibers 30 as a whole.
In this embodiment, the rigid reinforcing members 5 with appropriate sizes are disposed on two sides of the yarn reinforcing member 4, so that when the sensing optical cable is subjected to pressure from above, the rigid reinforcing members 5 can effectively prevent the sensing optical cable from further deformation, and the sensing optical fiber 30 of the sensing optical unit 3 is prevented from being subjected to external force, so that the sensing optical cable has better pressure resistance.
In some preferred embodiments, the rigid reinforcing member 5 may be at least one selected from a steel wire and a GFRP, i.e., a glass fiber reinforced plastic rod, and the steel wire may be a stainless steel wire, and it should be noted that other rigid materials commonly used may be used in addition to the steel wire and the GFRP.
Referring to fig. 1, in some preferred embodiments, the side of the rigid reinforcement member 5 away from the yarn reinforcement member 4 is provided with at least one KFRP reinforcement member 6, such that the yarn reinforcement member 4, the rigid reinforcement member 5 and the KFRP reinforcement member 6 are arranged at intervals along the length direction of the adhesive layer 2, wherein the KFRP reinforcement member is also an aramid reinforced plastic rod.
In this embodiment, by providing KFRP reinforcement 6 on the side of the rigid reinforcement 5 away from the yarn reinforcement 4, the strength of the sensing optical cable can be further ensured.
In some preferred embodiments, as shown in fig. 2, two KFRP reinforcements 6 are provided on the side of each rigid reinforcement 5 remote from the yarn reinforcements 4.
Referring to fig. 3 and 4, in some preferred embodiments, the sensing optical cable further includes a communication optical unit 7, the communication optical unit 7 is located inside the outer sheath 1, and the communication optical unit 7 includes a loose tube and a plurality of communication optical fibers 70, and the communication optical fibers 70 are disposed in the loose tube.
In this embodiment, the communication optical unit 7 is added, so that the sensing optical cable has multiple purposes, and multiple functions are integrated through one optical cable, thereby greatly reducing the laying cost and reducing the laying workload.
In some preferred embodiments, the communication light unit 7 and the sensing light unit 3 are disposed in the outer sheath 1 in various ways, and may be arranged according to actual needs.
For example, referring to the first arrangement shown in fig. 3, the communication light unit 7 and the sensing light unit 3 are arranged at intervals along the length direction of the adhesive layer 2.
For another example, referring to the second arrangement shown in fig. 4, the communication light unit 7 and the sensing light unit 3 are twisted on the central reinforcement member 8.
The communication optical fiber 70 in the communication optical unit 7 may be a single core or multiple cores; similarly, the sensing optical fiber 30 in the sensing optical unit 3 may be a single core or may be a multi-core.
Referring to fig. 1, in some preferred embodiments, the outer sheath 1 has a trapezoidal structure, and the adhesive layer 2 is disposed on one of the upper and lower bottoms of the trapezoidal structure.
Referring to fig. 1, preferably, the adhesive layer 2 is disposed on the lower bottom of the trapezoid structure, in this embodiment, the outer sheath is flat and has a trapezoid structure, the upper surface and the lower surface are flat and can be fully contacted with the ground or the wall, and the adhesive layer 2 is disposed on the lower surface, so as to ensure that the sensing optical fiber captures the seismic source signal sharply. Meanwhile, the outer sheath 1 is in a trapezoidal structure, the inclined planes on the two sides enable the sensing optical cable to effectively relieve the impact force from the side face, and the sensing optical cable is not easy to lift when being impacted by the side face.
Referring to fig. 5, in some preferred embodiments, the outer sheath 1 has a hexagonal structure, and the hexagonal structure has two parallel sides, and the adhesive layer 2 is disposed on one of the two parallel sides of the hexagonal structure;
in this embodiment, the adhesive layer 2 is disposed on one of two parallel edges of the hexagonal structure, and can be sufficiently contacted with the ground or the wall surface, so as to ensure that the sensing optical fiber sharply captures the seismic source signal. Meanwhile, the outer sheath 1 is in a hexagonal structure, the inclined planes on the two sides enable the sensing optical cable to effectively relieve the impact force from the side face, and the sensing optical cable is not easy to lift when being impacted by the side face.
Referring to fig. 6, in some preferred embodiments, the outer sheath 1 has two parallel sides, the adhesive layer 2 is disposed on one of the two parallel sides, and the ends of the two parallel sides close to each other are connected by a curved side, and the curved side is convex outward.
In this embodiment, the adhesive layer 2 is disposed on one of two parallel edges of the outer sheath 1, and can be sufficiently contacted with the ground or the wall surface, so as to ensure that the sensing optical fiber sharply captures the seismic source signal. Meanwhile, the end part of the outer sheath 1 is an arc-shaped edge which is outwards convex, and the arc-shaped edges at the two sides enable the sensing optical cable to effectively relieve the impact force from the side surface, so that the sensing optical cable is not easy to lift when being impacted by the side surface.
In some preferred embodiments, when the outer sheath 1 is in a trapezoid structure, a circular arc transition chamfer is formed at a junction of a bottom and a waist of the trapezoid structure, and when the outer sheath 1 is in a hexagon structure, a circular arc transition chamfer is formed at a junction of two adjacent sides of the hexagon structure.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; 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 by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A sensing optical cable is characterized by comprising an outer sheath (1), an adhesive layer (2), a sensing optical unit (3) and a yarn reinforcement (4); wherein the content of the first and second substances,
the adhesive layer (2) is arranged at the bottom of the outer sheath (1);
the light sensing unit (3) and the yarn reinforcement (4) are both positioned inside the outer sheath (1), and the yarn reinforcement (4) is distributed outside the light sensing unit (3); and the number of the first and second groups,
the sensing optical unit (3) comprises a loose tube and a plurality of sensing optical fibers (30), and the sensing optical fibers (30) are arranged in the loose tube.
2. A sensing cable according to claim 1, wherein: ointment is filled in the loose sleeve of the sensing light unit (3).
3. A sensing cable according to claim 1, wherein: the yarn reinforcement (4) comprises at least one of aramid yarn and glass yarn.
4. A sensing cable according to claim 1, wherein:
the two sides of the yarn reinforcing piece (4) are respectively provided with at least one rigid reinforcing piece (5), and the yarn reinforcing piece (4) and the rigid reinforcing pieces (5) are arranged at intervals along the length direction of the adhesive layer (2).
5. The sensing cable of claim 4, wherein: the rigid reinforcement member (5) includes at least one of a steel wire and a GFRP.
6. The sensing cable of claim 4, wherein: one side of the rigid reinforcing piece (5) far away from the yarn reinforcing piece (4) is provided with at least one KFRP reinforcing piece (6), so that the yarn reinforcing piece (4), the rigid reinforcing piece (5) and the KFRP reinforcing piece (6) are arranged along the length direction of the adhesive layer (2) at intervals.
7. A sensing cable according to claim 1, wherein:
the outer sheath (1) is of a trapezoidal structure, and the adhesive layer (2) is arranged on one of the upper bottom and the lower bottom of the trapezoidal structure; alternatively, the first and second electrodes may be,
the outer sheath (1) is of a hexagonal structure, two parallel edges of the hexagonal structure are formed, and the adhesive layer (2) is arranged on one of the two parallel edges of the hexagonal structure; alternatively, the first and second electrodes may be,
oversheath (1) has two limits that are parallel to each other, viscose layer (2) set up on one of them in two limits that should be parallel to each other, and the tip that two limits that should be parallel to each other are close to each other passes through the arc limit and connects, and this arc limit is outwards protruding.
8. The sensing cable of claim 7, wherein:
when the outer sheath (1) is in a trapezoid structure, an arc transition chamfer is formed at the joint of the bottom and the waist of the trapezoid structure;
when the outer sheath (1) is in a hexagonal structure, an arc transition chamfer is formed at the joint of two adjacent edges of the hexagonal structure.
9. A sensing cable according to claim 1, wherein: the sensing optical cable further comprises a communication optical unit (7), the communication optical unit (7) is located inside the outer sheath (1), the communication optical unit (7) comprises a loose tube and a plurality of communication optical fibers (70), and the communication optical fibers (70) are arranged in the loose tube.
10. A sensing cable according to claim 9, wherein:
the communication light unit (7) and the sensing light unit (3) are arranged at intervals along the length direction of the adhesive layer (2); or the like, or, alternatively,
the communication light unit (7) and the sensing light unit (3) are twisted on a central reinforcer (8).
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| CN202121558579.5U CN215262041U (en) | 2021-07-09 | 2021-07-09 | Sensing optical cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114442242A (en) * | 2021-12-29 | 2022-05-06 | 武汉烽理光电技术有限公司 | Vibration sensing optical cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114442242A (en) * | 2021-12-29 | 2022-05-06 | 武汉烽理光电技术有限公司 | Vibration sensing optical cable |
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