CN117805985A - Fence sensing optical cable based on distributed grating array technology - Google Patents
Fence sensing optical cable based on distributed grating array technology Download PDFInfo
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- CN117805985A CN117805985A CN202311742471.5A CN202311742471A CN117805985A CN 117805985 A CN117805985 A CN 117805985A CN 202311742471 A CN202311742471 A CN 202311742471A CN 117805985 A CN117805985 A CN 117805985A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 97
- 238000005516 engineering process Methods 0.000 title claims abstract description 21
- 239000013307 optical fiber Substances 0.000 claims abstract description 32
- 238000004806 packaging method and process Methods 0.000 claims abstract description 15
- 239000000835 fiber Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000009545 invasion Effects 0.000 abstract description 16
- 238000012544 monitoring process Methods 0.000 abstract description 16
- 241001465754 Metazoa Species 0.000 abstract description 5
- 230000035882 stress Effects 0.000 description 38
- 229910000831 Steel Inorganic materials 0.000 description 19
- 239000010959 steel Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229920000092 linear low density polyethylene Polymers 0.000 description 2
- 239000004707 linear low-density polyethylene Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- 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
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
- G01V8/20—Detecting, e.g. by using light barriers using multiple transmitters or receivers
- G01V8/24—Detecting, e.g. by using light barriers using multiple transmitters or receivers using optical fibres
-
- 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
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/4434—Central member to take up tensile loads
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/12—Mechanical actuation by the breaking or disturbance of stretched cords or wires
- G08B13/122—Mechanical actuation by the breaking or disturbance of stretched cords or wires for a perimeter fence
- G08B13/124—Mechanical actuation by the breaking or disturbance of stretched cords or wires for a perimeter fence with the breaking or disturbance being optically detected, e.g. optical fibers in the perimeter fence
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Burglar Alarm Systems (AREA)
Abstract
The invention discloses a fence sensing optical cable based on a distributed grating array technology, which belongs to the technical field of safety monitoring and comprises the following components: the optical fiber demodulation device comprises a stress sensing optical unit, an optical cable outer sheath, a first tensile member and a second tensile member, wherein the stress sensing optical unit comprises a packaging tube and a grating array tight-sleeved optical fiber which is arranged along the length direction of the packaging tube and is equal in length, and the grating array tight-sleeved optical fiber is connected with a demodulation instrument; the optical cable outer sheath is provided with a fixing part which is stretched by external force and a sensing part which is connected with the fixing part and deforms along with the stretching of the fixing part, the fixing part is used for being connected with the fence frame through two ends, and the sensing part is wrapped on the stress sensing light unit; the first tensile member and the second tensile member are respectively packaged in the fixed part and the sensing part; the invention can judge whether the man-made invasion is caused, can shield false alarm signals caused by strong wind and animals, can realize all-day and all-weather monitoring, and has very important practical value.
Description
Technical Field
The invention relates to the technical field of safety monitoring, in particular to a fence sensing optical cable based on a distributed grating array technology.
Background
At present, there are a large number of institutions or projects related to national confidentiality, civil security and high economic benefit, the area of the institutions or projects park is generally large, the institutions or projects park becomes low-efficiency and unsafe through a manual patrol mode, and therefore, the installation of efficient and intelligent security monitoring equipment or systems becomes necessary, and the functions of the efficient and intelligent security monitoring equipment or systems are to sense manual invasion and destructive behaviors and to perform quick response, positioning, warning and expelling.
The main solutions at present are an infrared camera, an optical cable with a vibration perimeter, an electronic fence, a fence sensor with a defense area, and the like. For example, publication number CN112309061a provides an infrared fence, which comprises a controller, an alarm device connected to the controller, and at least two infrared peripheral fence posts connected to the controller, wherein each infrared peripheral fence post comprises a post body, a plurality of infrared emitting devices arranged on the post body, and a plurality of infrared receiving devices arranged on the post body, and the infrared emitting devices on the infrared peripheral fence posts emit infrared rays to the infrared receiving devices on adjacent infrared peripheral fence posts so as to form an infrared grating between the two adjacent infrared peripheral fence posts. According to the invention, infrared rays are emitted to infrared receiving devices on adjacent infrared fence posts through infrared emitting devices on the infrared fence posts, so that an infrared grating is formed between the two adjacent infrared fence posts, when a person passes through the infrared grating, the infrared grating is cut off, at the moment, part of the infrared receiving devices cannot detect the infrared rays, and the controller controls the alarm device to give an alarm to warn constructors in a construction area and non-constructors running the construction area by mistake, so that the safety of a construction site is ensured.
In the prior art, when an infrared emission device and an infrared receiving device are used for forming an infrared grating or an optical cable with a vibration perimeter is used for monitoring, the infrared grating is easily influenced by heavy rain and heavy fog shielding, or the infrared grating is mistakenly touched by a sensing optical cable when being affected by strong wind and living beings, and the rail alarming device is triggered to give out an alarm, so that the problems of mistaken alarm and the like caused by the influence of weather and the invasion of living beings exist.
Disclosure of Invention
The invention aims to overcome the technical defects, and provides a fence sensing optical cable based on a distributed grating array technology, which solves the technical problems that fences are easily affected by heavy rain, heavy fog and shielding in the prior art, and false alarm is caused by strong wind and biological attack.
In order to achieve the above technical purpose, the technical scheme of the present invention provides a fence sensing optical cable based on a distributed grating array technology, comprising: the optical fiber cable comprises a stress sensing optical unit, an optical cable outer sheath, a first tensile member and a second tensile member, wherein the stress sensing optical unit comprises a packaging tube and grating array tight-sleeved optical fibers which are arranged along the same length of the length direction of the packaging tube, and the grating array tight-sleeved optical fibers are connected with a demodulation instrument; the optical cable outer sheath is provided with a fixing part which is stretched by external force and a sensing part which is connected with the fixing part and deforms along with the stretching of the fixing part, the fixing part is used for being connected with a fence frame through two ends, and the sensing part is wrapped in the stress sensing light unit; the first tensile member and the second tensile member are respectively encapsulated in the fixing portion and the sensing portion.
In some embodiments, the first tensile member includes a fixing wire fixed in the fixing portion of the cable outer sheath and extending in a length direction of the fixing portion such that both ends of the fixing wire protrude or are flush with both ends of the fixing portion, both ends of the fixing wire are connected to the rail frame, and the fixing wire is centrally disposed in the fixing portion and has a diameter of 2.5mm.
In some embodiments, the second tensile member includes an adjusting wire disposed at a side of the stress sensing light unit, fixed in the sensing portion of the cable outer sheath, and spaced apart from the stress sensing light unit, and two ends of the adjusting wire extend to two ends of the fixing portion along a length direction of the sensing portion. The adjusting steel wires are arranged in parallel with the stress sensing optical units at intervals, two adjusting steel wires are arranged on one side, close to and away from the fixing part of the optical cable outer sheath, of the stress sensing optical units, and the diameter of the adjusting steel wires is 0.5mm.
In some embodiments, the two sides between the fixing portion and the sensing portion are recessed inwards to form a recessed portion, the recessed portion penetrates through the optical cable outer sheath in the length direction, and the width of the cross section of the recessed portion sequentially increases in the direction away from the optical cable outer sheath.
Compared with the prior art, the invention has the beneficial effects that: the fixing part can be transversely fixed on the fence frame through the two ends through the stress sensing optical unit, the optical cable outer sheath, the first tensile member and the second tensile member, so that the tensile force generated by external invasion is perceived, and the first tensile member is packaged in the fixing part, so that the tensile performance of the fixing part is improved, and the optical cable outer sheath is prevented from being damaged after being deformed due to tensile force;
when the fixing part is stretched, the sensing part deforms at a corresponding position, and because the stress sensing optical unit is wrapped in the sensing part, stress generated by deformation is transmitted to the stress sensing optical unit in the fence sensing optical cable so as to cause wavelength change of the array grating, the stress sensing optical unit is provided with grating array tight-sleeved optical fibers which are arranged along the length direction of the packaging pipe and the like, and a grating array optical fiber technology is adopted, so that a plurality of monitoring areas are formed outside the optical cable outer sheath, and accurate positioning of foreign invasion can be realized according to the array grating wavelength change generated by the corresponding monitoring areas;
the second tensile member is packaged in the sensing part, so that deformation of the sensing part can be changed under the stretching of the fixed part, the tensile performance of the sensing part is improved, the deformation of the stress sensing optical unit can be controlled in the measuring range of the demodulation instrument, meanwhile, when the stress sensing optical unit is affected by weather interference and other organisms, the optical cable outer sheath cannot deform or can control the deformation in the warning range, whether the artificial invasion is judged, false alarm signals caused by strong wind and animals can be shielded, all-day and all-weather monitoring can be realized, and the optical cable outer sheath has very important practical value.
Drawings
FIG. 1 is a schematic cross-sectional view of an embodiment of a fence-based optical sensing cable according to the present invention;
FIG. 2 is a schematic diagram of the structure of the stress-sensing light-sensing unit of the fence-sensing optical cable of FIG. 1 based on the distributed grating array technology;
fig. 3 is a schematic diagram of the enclosure sensing fiber optic cable of fig. 1 based on the distributed grating array technique.
In the figure:
1. a stress sensing light unit; 11. packaging the tube; 12. tightening the sleeve; 13. a grating array optical fiber;
2. an optical cable outer sheath; 21. a fixing part; 22. a sensor unit; 23. a recessed portion;
3. a first tensile member;
4. a second tensile member; 5. a fence frame; 6. fence sensing optical cable.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1 to 3, the present invention provides a fence sensing optical cable based on a distributed grating array technology, comprising: the optical cable comprises a stress sensing optical unit 1, an optical cable outer sheath 2, a first tensile member 3 and a second tensile member 4, wherein the stress sensing optical unit 1 comprises a packaging tube 11 and grating array tight-sleeved optical fibers which are arranged along the length direction of the packaging tube 11 and have equal length, and the grating array tight-sleeved optical fibers are connected with a demodulation instrument; the optical cable outer sheath 2 is provided with a fixing part 21 for being stretched by external force and a sensing part 22 connected with the fixing part 21 and deformed along with the stretching of the fixing part 21, the fixing part 21 is used for being connected with the fence frame 5 through two ends, and the sensing part 22 is wrapped on the stress sensing light sensing unit 1; the first tensile member 3 and the second tensile member 4 are respectively encapsulated in the fixing portion 21 and the sensing portion 22.
In this scheme, the cable outer sheath 2 has a fixed part 21 for stretching under external force, and a sensing part 22 connected with the fixed part 21 and deformed along with stretching of the fixed part 21, when in implementation, the fixed part 21 is transversely fixed on the fence frame 5 through two ends to sense the tensile force generated by external invasion, and the first tensile member 3 is packaged in the fixed part 21 to improve the tensile performance of the fixed part 21 and prevent the cable outer sheath 2 from being damaged after being deformed under tensile force; when the fixing portion 21 is stretched, the sensing portion 22 will deform at a corresponding position, and since the stress sensing optical unit 1 is wrapped in the sensing portion 22, stress generated by deformation is transmitted to the stress sensing optical unit 1 inside the fence sensing optical cable, so that array grating wavelength changes can be caused, and the stress sensing optical unit 1 is provided with grating array tight-sleeved optical fibers arranged along the length direction of the packaging tube 11, so that the optical cable outer sheath 2 is provided with a plurality of monitoring areas, according to array grating wavelength changes generated by the corresponding monitoring areas, accurate positioning of foreign object invasion can be realized, and since the second tensile member 4 is packaged in the sensing portion 22, deformation of the sensing portion 22 under the stretching of the fixed portion 21 can be changed, tensile performance of the sensing portion 22 is improved, deformation of the stress sensing optical unit 1 is controlled in a measuring range of a demodulation instrument, and meanwhile, when the optical cable outer sheath 2 is disturbed and other organisms invaded, deformation can not be generated or can be controlled in a warning range, so that false alarm is avoided. The device has the advantages of simple structure, simple installation and maintenance, and capability of realizing all-day and all-weather monitoring.
Preferably, the packaging tube 11 is a metal spiral armoured tube, the grating array tight sleeve optical fiber comprises a tight sleeve 12 and a grating array optical fiber 13 arranged in the tight sleeve 12, the grating array optical fiber 13 is a complete optical fiber, gratings are equidistantly arranged in the optical fiber to serve as sensors, strain or stress change can be detected after special packaging and cabling are carried out on the optical fiber, the space between the optical fiber and the sensor can be predetermined according to various factors such as measuring precision, demodulation requirements, parameters of fence frame space and the like, the coverage area can be increased, and the monitoring distance is long.
Specifically, the grating in the laid fence sensing optical cable is positioned and calibrated through the demodulator, when certain external stress is met, the grating transmits an optical signal to the demodulator, the output result of the demodulator is observed, and finally the obtained wavelength and the initial wavelength are compared and recorded through the observation spectrogram. The deformation of the fence sensing optical cable can be set to be a deformation threshold, when the deformation threshold is smaller than the deformation threshold, the fence sensing optical cable is considered to be external interference, and when the deformation threshold is larger than or equal to the deformation threshold, the fence sensing optical cable is considered to be effective invasion. Through this kind of mode of setting up the threshold, can get rid of the protection cable and rock, animal is resided and is rocked the influence of the small effort such as rocking, reduces and avoid false alarm's production, and when rail sensing optical cable was in deformation threshold, stress sensing optical unit 1 can produce deformation and arouse array grating wavelength variation, and it shows wavelength variation quantity threshold value, can set for judging for personnel invasion through demodulation instrument.
Further, since the cable jacket 2 needs to deform when stretched, in some possible embodiments, the cable jacket 2 is made of LLDPE (linear low density polyethylene), which has the advantages of high hardness, good toughness, good temperature and weather resistance, and tear strength.
The first tensile member 3 is used for enhancing the tensile performance of the fixing portion 21, and in some possible embodiments, the first tensile member 3 includes a fixing steel wire, which is fixed in the fixing portion 21 of the optical cable outer jacket 2, and extends along the length direction of the fixing portion 21, so that two ends of the fixing steel wire protrude or are flush with two ends of the fixing portion 21, and the two ends are fixedly connected with the corresponding fence frame 5, so as to stably monitor the tension area. Wherein the fixing wire is centrally arranged within the fixing portion 21.
Specifically, the fixed steel wire is a phosphating steel wire with the diameter of 2.5mm, has very high tensile and compressive properties, and is clamped and locked on an optical cable outside the steel wire when the optical cable is laid, so that the optical cable can be well protected from being stretched and damaged, and in addition, the fixed optical cable is clamped on the section of the steel wire, and error signals caused by clamping in a sensitive area of an optical unit can be avoided.
The second tensile member 4 can enhance the tensile property of the sensing portion 22, in some possible embodiments, the second tensile member 4 includes an adjusting steel wire, where the adjusting steel wire is disposed on a side of the stress sensing unit 1 and is fixed in the sensing portion 22 of the cable jacket 2, and is spaced from the stress sensing unit 1, and two ends of the adjusting steel wire extend to two ends of the fixing portion 21 along a length direction of the sensing portion 22.
In this embodiment, the adjusting wire is juxtaposed and spaced apart from the stress-sensing light unit 1. The optical cable protection device is characterized in that two adjusting steel wires are arranged, the two adjusting steel wires are respectively arranged on one side of the stress sensing light sensing unit 1, which is close to and far away from the fixing part 21 of the optical cable outer sheath 2, when the optical cable protection device is implemented, the sensing part 22 is located under the fixing part 21, the fixing part 21 is stretched under the invasion action, the optical cable is pressed downwards due to the fact that the optical cable is pressed downwards due to artificial invasion, the pressed part of the optical cable is deformed downwards, and the two adjusting steel wires are arranged in the deformed direction, so that the optical cable protection device has a good tensile protection effect.
Specifically, the diameter of the phosphorized steel wire with the diameter of 0.5mm is adjusted, and the thickness of the phosphorized steel wire can be flexibly set according to the actual monitored environmental conditions, the alarm threshold setting conditions and the like, so that the phosphorized steel wire has certain tensile protection performance and sensitivity adjustment performance.
In other possible embodiments, the first tensile member 3 and the second tensile member 4 located within the cable jacket 2 are not limited to steel wires, but may be other structural members.
In some possible embodiments, the two sides between the fixing portion 21 and the sensing portion 22 are recessed inward to form a recess 23, and the recess 23 penetrates the cable jacket 2 in the length direction. The width of the cross section of the concave part 23 is gradually increased to the direction away from the optical cable outer sheath 2 to form a triangular cross section, and the arrangement can reduce the influence of deformation of the fixing part 21 on the sensing part 22, thereby reducing the influence of factors such as environment, animals and the like to a certain extent and preventing false alarm conditions beyond artificial invasion.
The above embodiments are merely a plurality of possible implementations of the embodiments of the present application, and the embodiments of the present application are not limited thereto.
This rail sensing optical cable 6 sets gradually along the direction of height on rail frame 5 when the installation, and in this embodiment, rail sensing optical cable 6 is provided with three, sets up a rail sensing optical cable 6 between the middle part of rail frame 5, sets up two and side by side and spaced rail sensing optical cable 6 between the top of rail frame 5, and top rail sensing optical cable 6 is located on the rail.
Preferably, the stress sensing light sensing unit 1 in the invention is based on a grating array optical fiber technology, and the distributed array grating is used for carving the grating into the optical fiber before the optical fiber is coated, so that compared with the traditional optical fiber grating, the grating array optical fiber 13 has the advantages of no fusion point, high reliability, high production efficiency, low preparation cost, long multiplexing length, easiness in cabling and packaging, small sensing grating spacing and the like. The optical fiber 13 of the grating array is placed in the metal spiral armor tube in a tightly sleeved optical fiber mode, hot melt adhesive with the length of 10-20 mm is injected into the metal spiral armor in an equidistant mode, the metal spiral armor and the tightly sleeved optical fiber of the grating array are fixed, and the stress sensing optical unit 1 is stretched in the cabling process, so that the tightly sleeved optical fiber of the grating array is stressed to form stretching to a certain extent. The fence sensing optical cable is set, stretched, laid and installed to serve as an initial standard parameter signal, and then a wavelength variation value which is judged to be shown by human invasion is set according to a large number of experimental results in the earlier stage.
According to the invention, through the stress sensing light sensing unit 1, the optical cable outer sheath 2, the first tensile member 3 and the second tensile member 4, the fixing part 21 can be transversely fixed on the fence frame 5 through two ends so as to sense the tensile force generated by external invasion, and the first tensile member 3 is packaged in the fixing part 21 so as to improve the tensile property of the fixing part 21 and prevent the optical cable outer sheath 2 from being damaged after being deformed due to tensile force. When the fixing portion 21 is stretched, the sensing portion 22 will deform at a corresponding position, and since the stress sensing optical unit 1 is wrapped in the sensing portion 22, stress generated by deformation is transmitted to the stress sensing optical unit 1 inside the fence sensing optical cable, so that array grating wavelength change can be caused, and the stress sensing optical unit 1 is provided with grating array tight-sleeved optical fibers arranged along the length direction of the packaging tube 11, and the grating array optical fiber technology is adopted, so that the optical cable outer sheath 2 is provided with a plurality of monitoring areas, and accurate positioning of foreign invasion can be realized according to array grating wavelength change generated by the corresponding monitoring areas.
The second tensile member 4 is packaged in the sensing part 22, so that deformation of the sensing part 22 under the stretching of the fixed part 21 can be changed, the tensile performance of the sensing part 22 is improved, the deformation of the stress sensing light unit 1 can be controlled within the measurement range of a demodulation instrument, meanwhile, when the stress sensing light unit is affected by weather interference and other organisms, the optical cable outer sheath 2 cannot deform or can control the deformation within the warning range, whether the stress sensing light unit is artificially invaded or not can be judged, false alarm signals caused by strong wind and animals can be shielded, all-day and all-weather monitoring can be realized, and the invention has very important practical value.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper" and "lower" and the like are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
It should be noted that in this 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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any other corresponding changes and modifications made in accordance with the technical idea of the present invention shall be included in the scope of the claims of the present invention.
Claims (10)
1. Fence sensing optical cable based on distributed grating array technology, characterized by comprising: the stress sensing optical unit, the optical cable outer sheath, the first tensile member and the second tensile member,
the stress sensing light sensing unit comprises a packaging tube and a grating array tight-sleeved optical fiber which is arranged along the length direction of the packaging tube and is equal in length, and the grating array tight-sleeved optical fiber is connected with a demodulation instrument;
the optical cable outer sheath is provided with a fixing part which is stretched by external force and a sensing part which is connected with the fixing part and deforms along with the stretching of the fixing part, the fixing part is used for being connected with a fence frame through two ends, and the sensing part is wrapped in the stress sensing light unit;
the first tensile member and the second tensile member are respectively encapsulated in the fixing portion and the sensing portion.
2. The fence sensing optical cable based on a distributed grating array technology according to claim 1, wherein the first tensile member includes a fixing wire fixed in a fixing portion of the cable jacket and extending in a length direction of the fixing portion such that both ends of the fixing wire protrude or are flush with both ends of the fixing portion, and both ends of the fixing wire are connected to the fence frame.
3. The fence sensing fiber optic cable based on distributed grating array technology of claim 2, wherein the securing wire is centrally disposed within the securing portion.
4. A fence sensing fiber optic cable based on distributed grating array technology as in claim 3, wherein the diameter of the fixed wire is 2.5mm.
5. The fence sensing optical cable based on a distributed grating array technology according to claim 1, wherein the second tensile member includes an adjusting wire disposed at a side of the stress sensing optical unit and fixed in the sensing portion of the cable outer sheath and spaced apart from the stress sensing optical unit, and both ends of the adjusting wire extend to both ends of the fixing portion along a length direction of the sensing portion.
6. The fence sensing fiber optic cable based on distributed grating array technology of claim 5, wherein the tuning wires are juxtaposed and spaced apart from the stress sensing light units.
7. The fence sensing optical cable based on a distributed grating array technology according to claim 6, wherein two adjusting wires are provided, and the two adjusting wires are respectively arranged on one side of the stress sensing light sensing unit, which is close to and away from the fixing part of the optical cable outer sheath.
8. The pen sensing cable based on distributed grating array technology according to claim 7, wherein the diameter of the tuning wire is 0.5mm.
9. The pen sensing cable based on the distributed grating array technology according to claim 1, wherein both sides between the fixing portion and the sensing portion are recessed inward to form a recess portion penetrating through the cable outer sheath in a length direction.
10. The pen sensing cable based on distributed grating array technology according to claim 9, wherein the width of the recess cross section increases sequentially in a direction away from the cable jacket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311742471.5A CN117805985A (en) | 2023-12-18 | 2023-12-18 | Fence sensing optical cable based on distributed grating array technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311742471.5A CN117805985A (en) | 2023-12-18 | 2023-12-18 | Fence sensing optical cable based on distributed grating array technology |
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| Publication Number | Publication Date |
|---|---|
| CN117805985A true CN117805985A (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311742471.5A Pending CN117805985A (en) | 2023-12-18 | 2023-12-18 | Fence sensing optical cable based on distributed grating array technology |
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| Country | Link |
|---|---|
| CN (1) | CN117805985A (en) |
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- 2023-12-18 CN CN202311742471.5A patent/CN117805985A/en active Pending
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