CN114442242A - Vibration sensing optical cable - Google Patents
Vibration sensing optical cable Download PDFInfo
- Publication number
- CN114442242A CN114442242A CN202111646221.2A CN202111646221A CN114442242A CN 114442242 A CN114442242 A CN 114442242A CN 202111646221 A CN202111646221 A CN 202111646221A CN 114442242 A CN114442242 A CN 114442242A
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- optical cable
- vibration sensing
- bearing surface
- sensing optical
- outer sheath
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The invention relates to a vibration sensing optical cable which comprises an outer sheath and a sensing unit, wherein the sensing unit is fixedly arranged in the outer sheath; the top of the outer sheath is provided with a positive bearing surface, the bottom of the outer sheath is provided with a binding surface, the binding surface is fixedly provided with an adhesive part, the two sides of the outer sheath are respectively provided with a first lateral bearing surface and a second lateral bearing surface, and the first lateral bearing surface and the second lateral bearing surface are offset towards one side of the sensing unit. Compared with the prior art, the vibration sensing optical cable provided by the invention is reinforced in two aspects of capability of bearing forward and lateral pressure and bonding with a tested structure body, and further, through the reinforcement in the two aspects, the vibration sensing optical cable provided by the invention can be directly bonded on the tested structure body without arranging a mounting groove, a protective cover plate and other protective structures, so that the laying efficiency of the optical cable is greatly improved.
Description
Technical Field
The invention relates to the technical field of information of the Internet of things, in particular to a vibration sensing optical cable.
Background
With the progress of society and the rapid development of cities, underground transportation becomes the most convenient green travel mode for urban people. Along with the construction and implementation of underground traffic in various cities, a plurality of safety problems such as fire fighting, perimeter security and protection, structural health of underground traffic pipe galleries and the like are caused.
Because the internet of things technology, especially the subway pipe gallery full-time global health monitoring technology based on the distributed fiber bragg grating vibration sensing principle has certain technical advantages in solving the safety problems, the technology is gradually put into trial use, is approved by relevant experts due to obvious detection effect, and is widely popularized. However, at the same time, the technology also faces some engineering practical problems, and the most serious problem is that the vibration sensing optical cable is laid with low efficiency.
The construction methods of the existing vibration sensing optical cable mainly comprise two types: 1. excavating a mounting groove on the surface of the measured structure, burying the detection optical cable into the mounting groove and fixedly sealing the mounting groove by concrete; 2. the detection cable is pasted on the detected structure body by using the structural adhesive, and the protective cover plate is covered at the same time so as to prevent the detection cable from being separated from the detected structure body under the action of external force. However, all of the above construction methods have disadvantages of complicated process, large amount of work, long curing time of concrete or structural adhesive, and the like. Moreover, the construction of the subway pipe gallery also has the problems of short construction window period and being restricted by multiple factors.
Therefore, a vibration sensing optical cable is needed to solve the problem of low laying efficiency of the existing vibration sensing optical cable.
Disclosure of Invention
In view of the above, there is a need to provide a vibration sensing optical cable to solve the problem of low laying efficiency of the existing vibration sensing optical cable.
The invention provides a vibration sensing optical cable which comprises an outer sheath and a sensing unit, wherein the sensing unit is fixedly arranged in the outer sheath;
the sensor comprises an outer sheath and is characterized in that a positive bearing surface is formed at the top of the outer sheath, an attaching surface is formed at the bottom of the outer sheath, an adhesive part is fixedly arranged on the attaching surface, a first lateral bearing surface and a second lateral bearing surface are respectively formed on two sides of the outer sheath, and the first lateral bearing surface and the second lateral bearing surface are offset towards one side of a sensing unit.
Further, the positive bearing surface is parallel to the binding surface.
Further, the first lateral bearing surface is symmetrical to the second lateral bearing surface.
Furthermore, the junction of the positive bearing surface and the first and second lateral bearing surfaces is formed with a fillet.
Further, the sensing unit is located in a central position of the outer sheath.
Furthermore, the vibration sensing optical cable further comprises a plurality of reinforcing cores, and the reinforcing cores are fixedly arranged in the outer sheath and are respectively positioned on two sides of the sensing unit.
Furthermore, the plurality of reinforcing cores are symmetrically distributed on two sides of the sensing unit.
Furthermore, the axes of the plurality of reinforcing cores and the axis of the sensing unit are in the same plane, and the plane is parallel to the attaching surface.
Furthermore, the diameters of the plurality of reinforcing cores are sequentially reduced from inside to outside.
Further, the bonding part comprises a bonding layer and a protective film, the bonding layer is fixedly arranged on the attaching surface, and the protective film is attached to the bonding layer.
Compared with the prior art, the vibration sensing optical cable provided by the invention has the following beneficial effects:
1. on one hand, the positive bearing surface, the first lateral bearing surface and the second lateral bearing surface of the vibration sensing optical cable respectively enhance the capacity of the vibration sensing optical cable for bearing the positive and lateral pressure of the outside, and the binding surface enhances the binding capacity of the vibration sensing optical cable, so that the vibration sensing optical cable can be directly stuck on a tested structure without additionally arranging a mounting groove, a protective cover plate and other protective structures, and the laying efficiency of the optical cable is greatly improved;
2. the binding surface of the vibration sensing optical cable increases the contact area of the vibration sensing optical cable and the measured structure, so that the structural vibration signal can be transmitted to the optical cable from the measured structure in a better transmission effect.
Drawings
FIG. 1 is a schematic view of an installation of a preferred embodiment of a vibration sensing cable provided in accordance with the present invention;
FIG. 2 is a schematic structural view of a preferred embodiment of a vibration sensing cable according to the present invention;
fig. 3 is a schematic structural diagram of a preferred embodiment of a sensing unit in the vibration sensing optical cable provided by the invention.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Referring to fig. 1 and 2, the present invention provides a vibration sensing optical cable, which includes an outer sheath 1 and a sensing unit 2, wherein the sensing unit 2 is fixedly disposed inside the outer sheath 1.
The top of the outer sheath 1 is provided with a positive bearing surface 11, and the positive bearing surface 11 can ensure that the vibration sensing optical cable is not easily damaged due to deformation when bearing positive pressure. The bottom of the outer sheath 1 is provided with a bonding surface 12 (for convenience of description, the following positional relationship is based on the bonding surface 12 being on a horizontal plane), the bonding surface 12 is fixedly provided with an adhesive part 3, and in an actual construction process, the vibration sensing optical cable can be directly bonded to a structure to be measured through the adhesive part 3.
A first lateral bearing surface 13 and a second lateral bearing surface 14 which are directly intersected with the forward bearing surface 11 and the fitting surface 12 are respectively formed on two sides of the outer sheath 1, and the first lateral bearing surface 13 and the second lateral bearing surface 14 are offset towards one side of the sensing unit 2. That is, the first lateral bearing surface 13 and the vertical plane form a first included angle offset to one side of the sensing unit 2, and the second lateral bearing surface 14 and the vertical plane form a second included angle offset to one side of the sensing unit 2. The first lateral bearing surface 13 and the second lateral bearing surface 14 can enable the vibration sensing optical cable to be uniformly diffused when bearing lateral pressure, and the vibration sensing optical cable cannot fall off from a measured structure.
It should be noted that the forward bearing surface 11 may be parallel to the attaching surface 12, or may not be parallel to the attaching surface 12, and the first included angle may be equal to the second included angle, or may not be equal to the second included angle, which is not limited in the present invention.
Compared with the prior art, the vibration sensing optical cable provided by the invention has the following beneficial effects: on one hand, the positive bearing surface 11, the first lateral bearing surface 13 and the second lateral bearing surface 14 respectively enhance the capability of the vibration sensing optical cable to bear the external positive and lateral pressure, and the binding surface 12 enhances the binding capability of the vibration sensing optical cable, so that the vibration sensing optical cable provided by the invention can be directly bound on a measured structure (such as a subway tunnel wall, a track groove and the like), and no additional mounting groove, protective cover plate and other protective structures are needed, thereby greatly improving the laying efficiency of the optical cable.
On the other hand, the attaching surface 12 increases the contact area between the vibration sensing optical cable and the measured structure, so that a better transmission effect can be achieved in the process of transmitting the structural vibration signal from the measured structure to the vibration sensing optical cable.
Referring to fig. 2, as a preferred embodiment, the front bearing surface 11 is parallel to the attachment surface 12. In this embodiment, when the front face of the vibration sensing cable is pressed, the portions of the front bearing surface 11 can be simultaneously stressed, thereby making it more difficult for the vibration sensing cable to deform.
With reference to fig. 2, as a preferred embodiment, the first lateral bearing surface 13 and the second lateral bearing surface 14 are symmetrical with respect to a vertical plane where the axis of the sensing unit 2 is located. Based on the structure, the bearing capacity of the two sides of the vibration sensing optical cable is more balanced, and the vibration sensing optical cable is more difficult to fall off from a measured structure body.
As shown in fig. 2, in a preferred embodiment, a fillet 15 is formed at a junction of the front supporting surface 11 and the first and second lateral supporting surfaces 13 and 14. The rounded corners 15 prevent the above-mentioned joints from generating concentrated stress, thereby improving the strength of the vibration sensing optical cable.
With reference to fig. 2, as a preferred embodiment, the sensing unit 2 is located at the center of the outer sheath 1, and the arrangement makes the internal structure of the vibration sensing optical cable more symmetrical and more difficult to deform.
Referring to fig. 1, as a preferred embodiment, the vibration sensing optical cable further includes a plurality of strength cores 4, and the strength cores 4 are fixedly disposed inside the outer sheath 1 and located at two sides of the sensing unit 2 respectively. The reinforcing core 4 can reinforce the vibration sensing optical cable, so as to prevent the vibration sensing optical cable from axial deformation generated in the laying or using process from affecting the sensing unit 2 and further causing measurement failure.
In addition, since the vibration sensing optical cable is required to have a certain width to meet the requirements of the bonding, signal transmission, pressure-bearing capacity, etc., the number and specification (i.e., diameter) of the reinforcing cores 4 can be changed within a certain range without changing the external dimensions of the vibration sensing optical cable in this embodiment, so that the vibration sensing optical cable can meet different strength requirements. Without changing the external dimensions of the vibration sensing cable, the vibration sensing cable can be manufactured at a lower cost (e.g., without changing the mold used in the manufacturing process).
The material of the core 4 may be selected according to the requirements of different environments. For example, when the vibration sensing optical cable needs to be all dielectric and non-conductive, the core 4 may be made of non-metal material such as FRP.
With reference to fig. 1, as a preferred embodiment, a plurality of the reinforcement cores 4 are symmetrically distributed on two sides of the sensing unit 2. The arrangement mode can enable the internal structure of the vibration sensing optical cable to be more symmetrical, and axial deformation is more difficult to generate in the laying or using process.
With continued reference to fig. 1, as a preferred embodiment, the axes of the plurality of reinforcing cores 4 are in the same plane as the axis of the sensing unit 2, and the plane is parallel to the attaching surface 12. The above arrangement enables the vibration sensing optical cable to be provided with a larger size of the reinforcing core 4 therein without changing the outer dimensions.
As for the beneficial effects brought by not changing the external dimensions of the vibration sensing optical cable, which have been described in detail above, the present invention is not described in detail herein.
With continued reference to fig. 1, as a preferred embodiment, the diameters of the plurality of reinforcing cores 4 decrease from inside to outside (i.e., from the side close to the sensing unit 2 to the side far from the sensing unit 2). Due to the arrangement mode of the first lateral bearing surface 13 and the second lateral bearing surface 14, the thicknesses of the two sides of the vibration sensing optical cable are gradually reduced from the side close to the sensing unit 2 to the side far away from the sensing unit 2. By the arrangement, more reinforcing cores 4 can be arranged in the vibration sensing optical cable under the condition that the external size is not changed.
As for the beneficial effects brought by not changing the external dimensions of the vibration sensing optical cable, which have been described in detail above, the present invention is not described in detail herein.
In a preferred embodiment, the adhesive portion 3 includes an adhesive layer fixedly provided on the bonding surface 12, and a protective film bonded to the adhesive layer. Compared with other types of bonding parts, the bonding part 3 in the embodiment is more convenient for mounting the vibration sensing optical cable, namely, a constructor only needs to tear off the protective film and then stick other parts to a tested structure through the bonding layer.
Referring to fig. 3, in a more specific embodiment, the sensing unit 2 includes an optical fiber 21, a fiber paste layer 22, a loose tube 23, and an aramid yarn layer 24, and the fiber paste layer 22, the loose tube 23, and the aramid yarn layer 24 are sequentially and fixedly disposed outside the optical fiber 21 from inside to outside.
The fiber paste layer 22 can prevent the corrosion (such as hydrogen evolution corrosion) of the optical fiber 21 caused by the water vapor in the air, and can also play a role in buffering the vibration bending, impact and vibration of the outside, and the material of the fiber paste layer can be synthetic oil, mineral oil, silicon oil and the like. The loose tube 23 can protect the optical fiber 21 from internal stress and external lateral pressure, and may be made of PBT (polybutylenemethacrylate), PC (polycarbonate), PA (nylon), or the like.
In summary, the vibration sensing optical cable provided by the invention has the following beneficial effects:
on one hand, the positive bearing surface, the first lateral bearing surface and the second lateral bearing surface of the vibration sensing optical cable respectively enhance the capacity of the vibration sensing optical cable for bearing the positive and lateral pressure of the outside, and the binding surface enhances the binding capacity of the vibration sensing optical cable, so that the vibration sensing optical cable can be directly stuck on a tested structure without additionally arranging a mounting groove, a protective cover plate and other protective structures, and the laying efficiency of the optical cable is greatly improved;
on the other hand, the binding surface of the vibration sensing optical cable increases the contact area between the vibration sensing optical cable and the measured structure, so that the structure vibration signal can achieve better transmission effect in the process of transmitting from the measured structure to the optical cable;
on the other hand, the reinforcing core arranged in the outer sheath can reinforce the vibration sensing optical cable, so that the vibration sensing optical cable is prevented from generating axial deformation in the laying or using process to influence the sensing unit, and further measurement failure is prevented;
on the other hand, the arrangement mode of the reinforcing cores can enable the vibration sensing optical cable to be provided with more reinforcing cores with larger specifications on the premise of not changing the external size of the vibration sensing optical cable.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. The vibration sensing optical cable is characterized by comprising an outer sheath and a sensing unit, wherein the sensing unit is fixedly arranged in the outer sheath;
the sensor comprises an outer sheath and is characterized in that a positive bearing surface is formed at the top of the outer sheath, an attaching surface is formed at the bottom of the outer sheath, an adhesive part is fixedly arranged on the attaching surface, a first lateral bearing surface and a second lateral bearing surface are respectively formed on two sides of the outer sheath, and the first lateral bearing surface and the second lateral bearing surface are offset towards one side of a sensing unit.
2. The vibration sensing optical cable of claim 1, wherein the forward bearing surface is parallel to the abutting surface.
3. The vibration sensing cable of claim 1, wherein the first lateral bearing surface is symmetrical to the second lateral bearing surface.
4. The vibration sensing optical cable of claim 1, wherein the junction of the front bearing surface and the first and second lateral bearing surfaces is formed with a fillet.
5. The vibration sensing optical cable of claim 1, wherein the sensing unit is located at a central position of the outer sheath.
6. The vibration sensing optical cable according to claim 1, further comprising a plurality of strength members, wherein the strength members are fixedly disposed inside the outer sheath and located at two sides of the sensing unit.
7. The vibration sensing optical cable according to claim 6, wherein the plurality of strength members are symmetrically disposed on both sides of the sensing unit.
8. The vibration sensing optical cable according to claim 6, wherein the axes of the plurality of strength members are in the same plane as the axis of the sensing unit, and the plane is parallel to the abutting surface.
9. The vibration sensing optical cable according to claim 6, wherein the diameter of the plurality of strength members decreases from inside to outside.
10. The vibration sensing optical cable according to claim 1, wherein the adhesive portion includes an adhesive layer fixedly provided on the attaching surface and a protective film attached to the adhesive layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111646221.2A CN114442242A (en) | 2021-12-29 | 2021-12-29 | Vibration sensing optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111646221.2A CN114442242A (en) | 2021-12-29 | 2021-12-29 | Vibration sensing optical cable |
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| Publication Number | Publication Date |
|---|---|
| CN114442242A true CN114442242A (en) | 2022-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111646221.2A Pending CN114442242A (en) | 2021-12-29 | 2021-12-29 | Vibration sensing optical cable |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424830A (en) * | 2013-07-26 | 2013-12-04 | 成都亨通光通信有限公司 | Butterfly self-support type sensing cable |
| CN103941333A (en) * | 2014-05-13 | 2014-07-23 | 深圳市圣诺光电科技有限公司 | Hollow plastic optical fiber and optical cable |
| CA3065509A1 (en) * | 2017-05-31 | 2018-12-06 | Corning Research & Development Corporation | Optical sensing cable with acoustic lensing or reflecting features |
| CN211125101U (en) * | 2019-10-28 | 2020-07-28 | 广州澳通电线电缆有限公司 | Composite elevator cable |
| CN111486985A (en) * | 2020-04-01 | 2020-08-04 | 中天传感技术有限公司 | Full-distributed magnetic adsorption multi-parameter sensing optical cable |
| CN213302634U (en) * | 2021-04-26 | 2021-05-28 | 武汉智慧地铁科技有限公司 | Flat vibration optical cable with protection function |
| CN215262041U (en) * | 2021-07-09 | 2021-12-21 | 烽火通信科技股份有限公司 | Sensing optical cable |
-
2021
- 2021-12-29 CN CN202111646221.2A patent/CN114442242A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424830A (en) * | 2013-07-26 | 2013-12-04 | 成都亨通光通信有限公司 | Butterfly self-support type sensing cable |
| CN103941333A (en) * | 2014-05-13 | 2014-07-23 | 深圳市圣诺光电科技有限公司 | Hollow plastic optical fiber and optical cable |
| CA3065509A1 (en) * | 2017-05-31 | 2018-12-06 | Corning Research & Development Corporation | Optical sensing cable with acoustic lensing or reflecting features |
| CN211125101U (en) * | 2019-10-28 | 2020-07-28 | 广州澳通电线电缆有限公司 | Composite elevator cable |
| CN111486985A (en) * | 2020-04-01 | 2020-08-04 | 中天传感技术有限公司 | Full-distributed magnetic adsorption multi-parameter sensing optical cable |
| CN213302634U (en) * | 2021-04-26 | 2021-05-28 | 武汉智慧地铁科技有限公司 | Flat vibration optical cable with protection function |
| CN215262041U (en) * | 2021-07-09 | 2021-12-21 | 烽火通信科技股份有限公司 | Sensing optical cable |
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