CN104101450A - Buried fiber grating type perimeter intrusion detector - Google Patents
Buried fiber grating type perimeter intrusion detector Download PDFInfo
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- CN104101450A CN104101450A CN201410373273.0A CN201410373273A CN104101450A CN 104101450 A CN104101450 A CN 104101450A CN 201410373273 A CN201410373273 A CN 201410373273A CN 104101450 A CN104101450 A CN 104101450A
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- 239000000835 fiber Substances 0.000 title claims abstract description 24
- 239000002184 metal Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 239000013307 optical fiber Substances 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 description 10
- 238000009434 installation Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000006399 behavior Effects 0.000 description 3
- 230000009545 invasion Effects 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a buried fiber grating type perimeter intrusion detector. The buried fiber grating type perimeter intrusion detector comprises a diaphragm type differential pressure gauge and two flexible pressure conduits, wherein the pressure conduits are filled with oily liquid, and are buried under the ground surface; the diaphragm type differential pressure gauge comprises a sealed metal shell; a pressure diaphragm is arranged in the metal shell; a fiber grating is fixed on the pressure diaphragm; one end of each flexible pressure conduit is connected with the pressure diaphragm in the metal shell, and the other end of each flexible pressure conduit is sealed. According to the detector, distributive ground surface pressure sensing detection is formed by adopting the pressure conduits, thereby solving the problem of failure to report in point type detection, and solving the problem of limitation on the application of a fiber grating vibration sensor in a bury scene.
Description
Technical field
The present invention relates to sensory field of optic fibre, relate in particular to a kind of buried grating type optical fiber perimeter intrusion detecting device.
Background technology
Optical fiber perimeter product can be divided into linked network and buried two kinds according to scene mode is installed, and detection principle mainly contains based on types such as fibre optic interferometer technology, optical fiber grating vibration sensor technology.So that its good concealment, anti-environmental interference ability be strong etc., scene that advantage cannot install entity physics guardrail net or enclosure wall at some has the comparatively wide market demand to buried optical fiber perimeter Protection Product.The buried Fiber optic micro-vibration sensor based on fibre optic interferometer technology [application number: 201210584013.9] wherein, utilize M-Z principle of interference, the monitoring of realization to the earth vibration signal, even can carry out audio monitoring, is applicable to very much the antitheft anti-excavation monitoring scene of ancient tomb group.
And circumference product based on optical fiber grating vibration sensor technology, generally be applicable to linked network mounting means, and bury inappositely installation scene, for example: Fiber Bragg Grating intelligently addressing circumference invasion self-adaptive warning system [application number: 201010147787.6] and optical fiber grating vibration sensor optical cable laying method [application number: 201310241862.9].Circumference product based on optical fiber grating vibration sensor technology is concatenated into vibration detecting array by optical fiber raster vibration sensor, is attached to protection network or is arranged on entity enclosure wall top, for intrusion behaviors such as climbing, cross, can report to the police.Yet the rock noise based on fibre optic interferometer principle and vibration monitor system, because its frequency band of detection is wider, and belong to discontinuously arranged, can there is the problem of the slightly high and detection blind area of rate of false alarm.Product based on optical fiber grating vibration sensor technology is only only applicable to the mounting means of linked network, cannot meet buried laid condition.
Summary of the invention
Technical matters to be solved by this invention is just to provide a kind of buried perimeter intrusion detecting device based on fiber grating strain sensor principle, can solve fibre optic interferometer type rock noise monitoring system due to wide the caused rate of false alarm of frequency band of detection is high and detector distributes a discontinuous difficult problem, the while also will overcome the problem that optical fiber raster vibration sensor cannot buried installation.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of buried grating type optical fiber perimeter intrusion detecting device is provided, comprises diaphragm type differential pressure gauge and two pliable pressure conduits, in described catheter pressure, be marked with oily liquids, and be embedded in below earth's surface;
This diaphragm type differential pressure gauge comprises the metal shell of sealing, in this metal shell, is provided with pressure-sensitive diaphragm, on this pressure-sensitive diaphragm, is fixed with fiber grating, and one end of two pliable pressure conduits is all connected with the pressure-sensitive diaphragm in metal shell, and the other end all seals.
In buried grating type optical fiber perimeter intrusion detecting device of the present invention, the other end of two pliable pressure conduits all connects sealing joint.
In buried grating type optical fiber perimeter intrusion detecting device of the present invention, the other end of two pliable pressure conduits is also connected with diaphragm type differential pressure gauge.
In buried grating type optical fiber perimeter intrusion detecting device of the present invention, described fiber grating is attached on pressure-sensitive diaphragm by bonding mode.
In buried grating type optical fiber perimeter intrusion detecting device of the present invention, described pressure-sensitive diaphragm is metallic membrane.
In buried grating type optical fiber perimeter intrusion detecting device of the present invention, described pliable pressure conduit is connected with metal shell by seal flange.
The beneficial effect that the present invention produces is: the present invention adopts the mode of catheter pressure, forms distributed earth gauge pressure sensor measuring, avoid point type to survey may introducing because sensitivity arranges the improper caused problem of failing to report.Overcome optical fiber raster vibration sensor limited problem when buried scene application simultaneously, by catheter pressure perception surface pressure, utilize the characteristic that catheter pressure can conducting pressure signal, avoided optical fiber grating vibration sensor type detector to the harsh requirement of the mechanical elasticity of medium is installed, make common soil can be used as carrier, realize the mounting and installation of detector.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of the buried grating type optical fiber perimeter intrusion detecting of first embodiment of the invention device;
Fig. 2 is the structural representation of the buried grating type optical fiber perimeter intrusion detecting of second embodiment of the invention device.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The buried grating type optical fiber perimeter intrusion detecting device of the embodiment of the present invention one, as shown in Figure 1, comprises a diaphragm type differential pressure gauge and two pliable pressure conduits 5 and 7, catheter pressure 5 and the 7 interior oily liquids that are all marked with.
This diaphragm type differential pressure gauge comprises the metal shell 1 of sealing, in this metal shell 1, is provided with pressure-sensitive diaphragm 2, and the one end that is fixed with 3, two pliable pressure conduits of fiber grating on this pressure-sensitive diaphragm 2 is all connected with the pressure-sensitive diaphragm 3 in metal shell, and the other end all seals.In embodiments of the invention, two pliable pressure conduits 5 are all connected sealing joint 6 with 7 the other end.Pliable pressure conduit 5 all can be connected with metal shell 1 by seal flange with 7.
In above-described embodiment, fiber grating 3 is attached on pressure-sensitive diaphragm 2 by bonding mode.Pressure-sensitive diaphragm 2 is for selecting metallic membrane.
Two pliable pressure conduits 5 and 7 need to be arranged on below earth's surface, imbed in sandy soil, when being trampled and roll, the variation of two catheter pressure internal pressure differences will make pressure-sensitive diaphragm 2 occur displacement, drive is arranged on the supercentral fiber grating 3 of diaphragm deformation occurs, and the variation of the characteristic wavelength reflecting by measuring optical fiber grating 3 can realize the detection of intrusion behavior to external world.The baried type circumference intrusion alarm system based on fiber grating pressure sensing technology of the present embodiment adopts optics passive detection technology, meet the technical requirement of security product to aspects such as disguise, reliability, low rate of false alarms, be applied in shallow layer surface, there is good protection effect.
In another embodiment of the present invention, as shown in Figure 2, the other end of two pliable pressure conduits is also connected with diaphragm type differential pressure gauge, and this diaphragm type differential pressure gauge is identical with diaphragm type differential pressure gauge in embodiment above.Adopt two fiber grating diaphragm type differential pressure gauge A and B, can realize the location to intrusion behavior, utilize invasion signal to the transmission time T1 of differential pressure gauge A and differential pressure gauge B and the mistiming of T2, can realize determining invasion position.
The present invention has adopted fiber grating pressure sensing technology, has reduced acquisition of signal frequency band, and the mode by pressure measurement realizes Ground Deformation and monitors, and has reduced system noise levels, and then reduces misreport of system rate; By adopting the mode of catheter pressure, form distributed earth gauge pressure sensor measuring, avoid point type to survey may introducing because sensitivity arranges the improper caused problem of failing to report.Overcome optical fiber raster vibration sensor limited problem when buried scene application simultaneously, by catheter pressure perception surface pressure, utilize the characteristic that catheter pressure can conducting pressure signal, avoided optical fiber grating vibration sensor type detector to the harsh requirement of the mechanical elasticity of medium is installed, make common soil can be used as carrier, realize the mounting and installation of detector.This detector realizes by the highly sensitive diaphragm type differential pressure gauge of fiber grating is housed the accurate measurement that pressure reduction in catheter pressure is changed, by the Measurement accuracy to fiber grating characteristic wavelength change information, make detector insensitive to factors such as optical fiber link loss, light source power variations, can realize the extraction of comparatively accurate pressure changing information.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (6)
1. a buried grating type optical fiber perimeter intrusion detecting device, is characterized in that, comprises diaphragm type differential pressure gauge and two pliable pressure conduits, is marked with oily liquids, and is embedded in below earth's surface in described catheter pressure;
This diaphragm type differential pressure gauge comprises the metal shell of sealing, in this metal shell, is provided with pressure-sensitive diaphragm, on this pressure-sensitive diaphragm, is fixed with fiber grating, and one end of two pliable pressure conduits is all connected with the pressure-sensitive diaphragm in metal shell, and the other end all seals.
2. buried grating type optical fiber perimeter intrusion detecting device according to claim 1, is characterized in that, the other end of two pliable pressure conduits all connects sealing joint.
3. buried grating type optical fiber perimeter intrusion detecting device according to claim 1, is characterized in that, the other end of two pliable pressure conduits is also connected with diaphragm type differential pressure gauge.
4. buried grating type optical fiber perimeter intrusion detecting device according to claim 1, is characterized in that, described fiber grating is attached on pressure-sensitive diaphragm by bonding mode.
5. buried grating type optical fiber perimeter intrusion detecting device according to claim 1, is characterized in that, described pressure-sensitive diaphragm is metallic membrane.
6. buried grating type optical fiber perimeter intrusion detecting device according to claim 3, is characterized in that, described pliable pressure conduit is connected with metal shell by seal flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410373273.0A CN104101450B (en) | 2014-08-01 | 2014-08-01 | Buried grating type optical fiber perimeter intrusion detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410373273.0A CN104101450B (en) | 2014-08-01 | 2014-08-01 | Buried grating type optical fiber perimeter intrusion detecting device |
Publications (2)
| Publication Number | Publication Date |
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| CN104101450A true CN104101450A (en) | 2014-10-15 |
| CN104101450B CN104101450B (en) | 2017-03-15 |
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| CN201410373273.0A Active CN104101450B (en) | 2014-08-01 | 2014-08-01 | Buried grating type optical fiber perimeter intrusion detecting device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258273A (en) * | 2015-08-21 | 2016-01-20 | 美的集团武汉制冷设备有限公司 | Air-conditioning system, air-conditioner and alarming method for theft prevention through air-conditioning system |
| CN105716757A (en) * | 2016-04-15 | 2016-06-29 | 林宏韬 | Flexible tactile sensing device and method for sensing contact pressure on surface of three-dimensional object |
| CN106408821A (en) * | 2016-12-09 | 2017-02-15 | 上海锂居信息科技有限公司 | Buried perimeter intrusion detection system and method |
| CN107923745A (en) * | 2015-08-26 | 2018-04-17 | 住友建机株式会社 | The measuring device of excavator |
| CN111815882A (en) * | 2020-07-21 | 2020-10-23 | 国网河南淅川县供电公司 | Alarm for outdoor power supply operation |
| CN112595446A (en) * | 2021-03-02 | 2021-04-02 | 南京派光智慧感知信息技术有限公司 | Stress detection protective fence |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3438021A (en) * | 1965-07-26 | 1969-04-08 | Westinghouse Electric Corp | Perimeter intrusion alarm |
| US3719939A (en) * | 1971-02-09 | 1973-03-06 | Westinghouse Electric Corp | Differential pressure transducer |
| US4899046A (en) * | 1985-12-24 | 1990-02-06 | Schlumberger Industries, S.A. | Optical sensor of physical magnitude |
| US6304686B1 (en) * | 2000-02-09 | 2001-10-16 | Schlumberger Technology Corporation | Methods and apparatus for measuring differential pressure with fiber optic sensor systems |
| CN102162757A (en) * | 2010-12-02 | 2011-08-24 | 山东科技大学 | Fiber grating earth pressure sensor |
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| CN102901593A (en) * | 2012-11-01 | 2013-01-30 | 中国科学院半导体研究所 | Fiber Bragg grating soil pressure sensor based on two L-type beams |
| CN102944342A (en) * | 2012-11-16 | 2013-02-27 | 中国科学院半导体研究所 | Differential type optical fiber earth pressure gage |
| CN103017950A (en) * | 2012-11-26 | 2013-04-03 | 山东大学 | High-sensitivity fiber bragg grating earth pressure gauge |
| CN103076049A (en) * | 2013-02-04 | 2013-05-01 | 中国科学院半导体研究所 | Pressure difference type optical fiber flow meter |
-
2014
- 2014-08-01 CN CN201410373273.0A patent/CN104101450B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3438021A (en) * | 1965-07-26 | 1969-04-08 | Westinghouse Electric Corp | Perimeter intrusion alarm |
| US3719939A (en) * | 1971-02-09 | 1973-03-06 | Westinghouse Electric Corp | Differential pressure transducer |
| US4899046A (en) * | 1985-12-24 | 1990-02-06 | Schlumberger Industries, S.A. | Optical sensor of physical magnitude |
| US6304686B1 (en) * | 2000-02-09 | 2001-10-16 | Schlumberger Technology Corporation | Methods and apparatus for measuring differential pressure with fiber optic sensor systems |
| CN102162757A (en) * | 2010-12-02 | 2011-08-24 | 山东科技大学 | Fiber grating earth pressure sensor |
| CN102809460A (en) * | 2012-08-24 | 2012-12-05 | 祝海丽 | Novel optical fiber fluid differential pressure gauge |
| CN102901593A (en) * | 2012-11-01 | 2013-01-30 | 中国科学院半导体研究所 | Fiber Bragg grating soil pressure sensor based on two L-type beams |
| CN102944342A (en) * | 2012-11-16 | 2013-02-27 | 中国科学院半导体研究所 | Differential type optical fiber earth pressure gage |
| CN103017950A (en) * | 2012-11-26 | 2013-04-03 | 山东大学 | High-sensitivity fiber bragg grating earth pressure gauge |
| CN103076049A (en) * | 2013-02-04 | 2013-05-01 | 中国科学院半导体研究所 | Pressure difference type optical fiber flow meter |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258273A (en) * | 2015-08-21 | 2016-01-20 | 美的集团武汉制冷设备有限公司 | Air-conditioning system, air-conditioner and alarming method for theft prevention through air-conditioning system |
| CN105258273B (en) * | 2015-08-21 | 2018-05-25 | 美的集团武汉制冷设备有限公司 | Air-conditioning system, air conditioner and the alarm method that theft protection is carried out by air-conditioning system |
| CN107923745A (en) * | 2015-08-26 | 2018-04-17 | 住友建机株式会社 | The measuring device of excavator |
| CN107923745B (en) * | 2015-08-26 | 2021-07-23 | 住友建机株式会社 | Measuring device for excavator |
| CN105716757A (en) * | 2016-04-15 | 2016-06-29 | 林宏韬 | Flexible tactile sensing device and method for sensing contact pressure on surface of three-dimensional object |
| CN105716757B (en) * | 2016-04-15 | 2018-07-20 | 林宏韬 | The method that softness haptic perception sensing device and sensing three-dimensional object surface pressure are touched |
| CN106408821A (en) * | 2016-12-09 | 2017-02-15 | 上海锂居信息科技有限公司 | Buried perimeter intrusion detection system and method |
| CN111815882A (en) * | 2020-07-21 | 2020-10-23 | 国网河南淅川县供电公司 | Alarm for outdoor power supply operation |
| CN112595446A (en) * | 2021-03-02 | 2021-04-02 | 南京派光智慧感知信息技术有限公司 | Stress detection protective fence |
| CN112595446B (en) * | 2021-03-02 | 2021-05-28 | 南京派光智慧感知信息技术有限公司 | Stress detection protective fence |
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| CN104101450B (en) | 2017-03-15 |
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