CN105403338A - Optical Fiber Pressure Device - Google Patents
Optical Fiber Pressure Device Download PDFInfo
- Publication number
- CN105403338A CN105403338A CN201510739873.9A CN201510739873A CN105403338A CN 105403338 A CN105403338 A CN 105403338A CN 201510739873 A CN201510739873 A CN 201510739873A CN 105403338 A CN105403338 A CN 105403338A
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- Prior art keywords
- optical fiber
- compressing tablet
- pressing plate
- groove
- base
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
本发明提供一种光纤受压装置，包括底座，压板，压片、弹簧和光纤，所述底座与压板之间由弹簧支撑；底座上开有光纤槽和压片槽，光纤安置于光纤槽内，压片安放于压片槽内，光纤槽和压片槽相通；光纤槽底部成齿形或起伏形状，在压板与底座扣合时，压板施压于压片，压片施压于光纤，光纤不断受压而产生微弯形变，导致光纤中光模式耦合，发生光泄漏，传输强度减弱；通过控制光纤槽槽形、压片槽分布以及安放的压片数量，可以控制传输光强的变化，在压板卸力过程中压片与光纤趋于松弛，光纤复原，恢复施压前传输状态，此装置用于测试受压型光纤微弯传感器的工作性能，也能作为一种光纤微弯传感器使用。
The invention provides an optical fiber pressure device, which includes a base, a pressing plate, a pressing plate, a spring and an optical fiber, the base and the pressing plate are supported by a spring; the base is provided with an optical fiber groove and a pressing plate groove, and the optical fiber is placed in the optical fiber groove , the pressing piece is placed in the pressing piece groove, the optical fiber groove and the pressing piece groove are connected; the bottom of the fiber optic groove is toothed or undulating, when the pressing plate is fastened with the base, the pressing plate presses on the pressing piece, and the pressing piece applies pressure on the optical fiber. The optical fiber is constantly under pressure to produce microbending deformation, resulting in optical mode coupling in the optical fiber, light leakage, and weakened transmission intensity; by controlling the shape of the fiber groove, the distribution of the pressing groove and the number of placed pressing pieces, the change of the transmission light intensity can be controlled , during the unloading process of the pressing plate, the pressing plate and the optical fiber tend to relax, the optical fiber recovers, and the transmission state before the pressure is applied, this device is used to test the working performance of the compressed optical fiber microbending sensor, and can also be used as a kind of optical fiber microbending sensor use.
Description
Technical field
The invention belongs to technical field of optical fiber sensing, be specifically related to a kind of optical fiber by pressure device.
Background technology
The advantage of Fibre Optical Sensor is precise structure, highly sensitive, and shortcoming is that manufacturing cost is high.For intensity modulation optical fiber sensor, structural layout is extremely important with design, optical fiber micro-bending pressure sensing technology should have breakthrough in structural design and material, just can reduce costs, for improving application reliability, balance to be made to the complicacy of structure and rationality, consider the compound action of material and ray machine system simultaneously.
Publication number is a kind of pressure transducer based on fiber microbending loss of CN102147303A, by elastic plate and tooth plate extruding optical fiber, produces minor bending and becomes, but lack Stress control and Cushioning Design, easily cause optical fiber to damage.
Publication number is a kind of distribution type fiber-optic pressure transducer based on OTDR of CN204188317U, multistage multimode optical fiber rectangular Periodic structure is inserted in sheet rubber, form the optical fiber micro-bending sensor Distributed Application based on OTDR, but the pressure sensing characteristic after ageing of rubber easily changes.
The present invention is directed to optical fiber pressurized vibration, optical fiber is placed in a ray machine compound system reasonable in design, proving installation adapts to the micro-curved character of different fiber, for studying pressure-deformation-light intensity attribute when pressure acts on optical fiber, design on the whole again, become the Fibre Optical Sensor that a kind of applicability is stronger.
Summary of the invention
The present invention designs a kind of optical fiber by pressure device, micro-curved amplitude when can configure and control optical fiber pressurized and length, optical fiber are squeezed degree, optical fiber pressure spot position, pressure spot quantity, pressure limit, pressure limitation and pressure buffer etc., and this device also can use as optical fiber micro-bending pressure transducer.
For achieving the above object, the present invention adopts following technical scheme:
A kind of optical fiber is by pressure device, and comprise base, pressing plate, compressing tablet, spring and optical fiber, described spring is arranged at the corner of base and the both sides at middle part, and described pressing plate is fastened on base, and pressing plate passes through spring supporting; Have some optical fiber ducts in the middle part of described base, bottom described optical fiber duct, many places become profile of tooth or undulations, and optical fiber duct has some compressing tablet grooves, and optical fiber duct and compressing tablet groove communicate, and described fiber placing is in optical fiber duct, and some compressing tablets are placed in compressing tablet groove; When pressing plate and base fasten, pressing plate applies pressure to compressing tablet, and compressing tablet applies pressure to optical fiber, and the continuous pressurized of optical fiber, optical fiber produces minor bending and becomes due to the extruding bottom compressing tablet and optical fiber duct, cause optical mode coupling in optical fiber, light occurs and leaks, intensity transmission weakens.
Described optical fiber duct quantity and be placed in the fiber count of optical fiber duct, grooved size, bottom land tooth proportions, the number of teeth or undulations can change, quantity >=1 of optical fiber duct.
Quantity, the grooved size of described compressing tablet groove can change, quantity >=1 of compressing tablet groove,
The size dimension of described compressing tablet can control, quantity >=1 of the quantity >=compressing tablet of compressing tablet groove.
The kind of described spring is variable, and the spring of different qualities can provide different impressed pressure scopes, and the fastening of base and pressing plate is Embedded, namely stops relative displacement until closely sealed; Control the length of compressing tablet and can control the degree of depth that compressing tablet enters compressing tablet groove, thus control sensing dynamic perfromance, the degree of depth that compressing tablet enters compressing tablet groove has ultimate value, ensure optical fiber can not pressurized excessive and impaired.
Know-why of the present invention is as follows:
Optical fiber has macrobend loss and microbend loss, according to mode coupling theory, the difference that the longitudinal propagation constant of the two-mode of luminous energy coupling occurs is relevant with the cycle of periodic disturbance, this disturbance can be produced by profile of tooth or the relative displacement between periodic undulations shape machinery and compacting thing, the size in this cycle is calculated by concrete optical fiber, in the situation that the fluctuating cycle is this value odd-multiple, fibre-optical bending deformation has identical cosine harmonics component, also very high sensitivity can be obtained, the present invention is when as proving installation, namely can change and control above-mentioned parameter, to meet different sensing testing requirements, this device has independently pressure sensing pattern, can be used alone, also can be used for distributed situation, adopt OTDR measuring method also effective.
Compared with prior art, the present invention has following substantive distinguishing features and advantage:
Optical fiber does not directly contact with pressing plate, but by compressing tablet transmission of pressure, the shape of compressing tablet, compression distance comprise optical fiber duct bottom shape according to the concrete kind of optical fiber, optical fiber duct grooved and be configured, compressing tablet and pressing plate are also in released state before pressing plate pressurized, only when pressing plate pressurized, pressing plate contacts compressing tablet gradually, then to exert pressure compressing tablet, power is delivered to optical fiber, unload compressing tablet and optical fiber in power process at pressing plate and be tending towards lax, compressing tablet and pressing plate depart from, and optical fiber restores, and improves the automatic recovery ability of optical fiber.
The spring of different qualities provides different impressed pressure scopes, and the fastening of base and pressing plate is Embedded, namely stops relative displacement until closely sealed, and make the compression distance of compressing tablet have a ultimate value, optical fiber can not be impaired.
Due to optical fiber duct and the quantity of settling optical fiber, compressing tablet groove distributes, and quantity and the compressing tablet compression distance of laying compressing tablet can change, and the light intensity-pressure characteristic of optical fiber can configure and control.
Accompanying drawing explanation
Fig. 1 is that optical fiber is subject to pressure device three-dimensional profile figure.
Fig. 2 is base structure figure.
Fig. 3 is base three-dimensional profile figure.
Fig. 4 is pressing plate three-dimensional profile figure.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of apparatus of the present invention is further described.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a kind of optical fiber is by pressure device, and comprise base 1, pressing plate 2, compressing tablet 3, spring 4 and optical fiber 7, described spring 4 is arranged at the corner of base 1 and the both sides at middle part, and described pressing plate 2 is fastened on base 1, and pressing plate 2 is supported by spring 4; Some optical fiber ducts 5 are had in the middle part of described base 1, bottom described optical fiber duct 5, many places become profile of tooth or undulations, and optical fiber duct 5 has some compressing tablet grooves 6, and optical fiber duct 5 and compressing tablet groove 6 communicate, described optical fiber 7 is placed in optical fiber duct 5, and some compressing tablets 3 are placed in compressing tablet groove 6; When pressing plate 2 fastens with base 1, pressing plate 2 applies pressure to compressing tablet 3, and compressing tablet 3 applies pressure to optical fiber 7, optical fiber 7 is pressurized constantly, and optical fiber 7 produces minor bending and becomes due to the extruding bottom compressing tablet 3 and optical fiber duct 5, causes optical mode coupling in optical fiber 7, generation light leaks, and intensity transmission weakens.
The quantity of optical fiber duct 5 and be placed in the fiber count of optical fiber duct, grooved size, bottom land tooth proportions, the number of teeth or undulations can change.
Quantity, the grooved size of compressing tablet groove 6 can change, quantity >=1 of compressing tablet groove 6, quantity >=1 of compressing tablet 3, lay at most the quantity that number is no more than compressing tablet groove 6.
The kind of spring 4 is variable, and the spring of different qualities can provide different impressed pressure scopes, and the fastening of base 1 and pressing plate 2 is Embedded, namely stops relative displacement until closely sealed.The degree of depth that described compressing tablet 3 enters compressing tablet groove 6 has ultimate value, ensure optical fiber 7 can not pressurized excessive and impaired.
Embodiment one: optical fiber duct 5 number is 1, optical fiber 7 is placed in this optical fiber duct 5, and the quantity of compressing tablet groove 6 is 6, and compressing tablet 3 quantity is 1, and compressing tablet 3 is in any one compressing tablet groove 6.
Embodiment two: optical fiber duct 5 number is 2, optical fiber 7 is placed in a certain optical fiber duct 5, the quantity of compressing tablet groove 6 is 12, six compressing tablet grooves 6 and an optical fiber duct 5 join, another six compressing tablet grooves 6 join with another optical fiber duct 5, compressing tablet 3 quantity is 2, has in any 2 compressing tablet grooves 6 of optical fiber 7 in compressing tablet 3 is in.
Embodiment three: optical fiber duct 5 number is 2, two sections of optical fiber 7 are placed in two optical fiber ducts 5 respectively, the quantity of compressing tablet groove 6 is 12, six compressing tablet grooves 6 and an optical fiber duct 5 join, another six compressing tablet grooves 6 join with another optical fiber duct 5, compressing tablet 3 quantity is that 2, two compressing tablets 3 are exerted pressure two sections of optical fiber 7 respectively, and compressing tablet 3 can be selected in compressing tablet groove 6 position at optical fiber 7 place.
Embodiment four: optical fiber duct 5 number is 2, two sections of optical fiber 7 are placed in two optical fiber ducts 5 respectively, the quantity of compressing tablet groove 6 is 12, six compressing tablet grooves 6 and an optical fiber duct 5 join, another six compressing tablet grooves 6 join with another optical fiber duct 5, and compressing tablet 3 quantity is the optical fiber 7 that 4, two compressing tablets 3 are exerted pressure in an optical fiber duct 5, the optical fiber 7 that another two compressing tablets 3 are exerted pressure in another optical fiber duct 5, compressing tablet 3 can be selected in compressing tablet groove 6 position at optical fiber 7 place.
Optical fiber duct 5, compressing tablet groove 6 are not limited to four kinds of examples above with the quantity relations of distribution of compressing tablet 3.
Claims (2)
1. an optical fiber is by pressure device, it is characterized in that, comprise base (1), pressing plate (2), compressing tablet (3), spring (4) and optical fiber (7), described spring (4) is arranged at the corner of base (1) and the both sides at middle part, described pressing plate (2) is fastened on base (1), and pressing plate (2) is supported by spring (4); Described base (1) middle part has some optical fiber ducts (5), many places, described optical fiber duct (5) bottom become profile of tooth or undulations, optical fiber duct (5) has some compressing tablet grooves (6), optical fiber duct (5) and compressing tablet groove (6) communicate, described optical fiber (7) is placed in optical fiber duct (5), and some compressing tablets (3) are placed in compressing tablet groove (6); When pressing plate (2) and base (1) fasten, pressing plate (2) applies pressure to compressing tablet (3), and compressing tablet (3) applies pressure to optical fiber (7), and optical fiber (7) is pressurized constantly, and optical fiber (7) produces minor bending change due to the extruding bottom compressing tablet (3) and optical fiber duct (5).
2. optical fiber according to claim 1 is by pressure device, and it is characterized in that, the degree of depth that described compressing tablet (3) enters compressing tablet groove (6) has ultimate value, ensure optical fiber (7) can not pressurized excessive and impaired.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510739873.9A CN105403338A (en) | 2015-11-04 | 2015-11-04 | Optical Fiber Pressure Device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510739873.9A CN105403338A (en) | 2015-11-04 | 2015-11-04 | Optical Fiber Pressure Device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105403338A true CN105403338A (en) | 2016-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510739873.9A Pending CN105403338A (en) | 2015-11-04 | 2015-11-04 | Optical Fiber Pressure Device |
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| CN (1) | CN105403338A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580053A (en) * | 2018-11-14 | 2019-04-05 | 国网浙江杭州市余杭区供电有限公司 | A kind of optical fiber matches the fibre optic compression sensor system of fine disk body |
| CN110838215A (en) * | 2019-12-09 | 2020-02-25 | 重庆第二师范学院 | Perimeter security intrusion monitoring optical fiber sensor for improving travel safety and monitoring method |
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| CN101251615A (en) * | 2008-03-31 | 2008-08-27 | 山东大学 | Multi-channel Tunable Long Period Fiber Bragg Grating Filter |
| US20090110009A1 (en) * | 2007-10-30 | 2009-04-30 | Fei Luo | Optical fiber grating tuning device and optical systems employing same |
| CN102565978A (en) * | 2012-01-15 | 2012-07-11 | 南京华脉科技有限公司 | Ground cabling trough for bow-type optical cables |
| CN202735067U (en) * | 2012-06-20 | 2013-02-13 | 南京烽火藤仓光通信有限公司 | Device for detecting microbend loss of optical fiber |
| CN103675340A (en) * | 2013-12-20 | 2014-03-26 | 北京航天时代光电科技有限公司 | Optical fiber accelerometer in differential double-grating structure |
| CN103698061A (en) * | 2012-09-27 | 2014-04-02 | 上海华魏光纤传感技术有限公司 | Online monitoring fence device based on optical fiber microbend loss |
-
2015
- 2015-11-04 CN CN201510739873.9A patent/CN105403338A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090110009A1 (en) * | 2007-10-30 | 2009-04-30 | Fei Luo | Optical fiber grating tuning device and optical systems employing same |
| CN101251615A (en) * | 2008-03-31 | 2008-08-27 | 山东大学 | Multi-channel Tunable Long Period Fiber Bragg Grating Filter |
| CN102565978A (en) * | 2012-01-15 | 2012-07-11 | 南京华脉科技有限公司 | Ground cabling trough for bow-type optical cables |
| CN202735067U (en) * | 2012-06-20 | 2013-02-13 | 南京烽火藤仓光通信有限公司 | Device for detecting microbend loss of optical fiber |
| CN103698061A (en) * | 2012-09-27 | 2014-04-02 | 上海华魏光纤传感技术有限公司 | Online monitoring fence device based on optical fiber microbend loss |
| CN103675340A (en) * | 2013-12-20 | 2014-03-26 | 北京航天时代光电科技有限公司 | Optical fiber accelerometer in differential double-grating structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109580053A (en) * | 2018-11-14 | 2019-04-05 | 国网浙江杭州市余杭区供电有限公司 | A kind of optical fiber matches the fibre optic compression sensor system of fine disk body |
| CN110838215A (en) * | 2019-12-09 | 2020-02-25 | 重庆第二师范学院 | Perimeter security intrusion monitoring optical fiber sensor for improving travel safety and monitoring method |
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Application publication date: 20160316 |