CN102147303A - Pressure sensor based on optical fiber microbending losses - Google Patents
Pressure sensor based on optical fiber microbending losses Download PDFInfo
- Publication number
- CN102147303A CN102147303A CN2010101115362A CN201010111536A CN102147303A CN 102147303 A CN102147303 A CN 102147303A CN 2010101115362 A CN2010101115362 A CN 2010101115362A CN 201010111536 A CN201010111536 A CN 201010111536A CN 102147303 A CN102147303 A CN 102147303A
- Authority
- CN
- China
- Prior art keywords
- elastic plate
- pressure transducer
- distortion
- tooth
- microbending loss
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Measuring Fluid Pressure (AREA)
- Optical Transform (AREA)
Abstract
The invention discloses a pressure sensor based on optical fiber microbending losses, which comprises an elastic plate made from a flexible material and a toothed plate made from a rigid material and provided with deformation teeth, and signal optical fibers are sandwiched between the elastic plate and the deformation teeth of the toothed plate. Because the elastic plate has deformability, the elastic plate is partially deformed according to the deformation teeth of the toothed plate under the action of pressure, meanwhile, the signal optical fibers deform and bend so that signal light transmitted inside the signal optical fibers is subjected to bending loss, and thus, the purpose of converting pressure signals into optical signals is achieved. The pressure sensor disclosed by the invention has the advantages of simple structure, reasonableness in design, convenience for processing and manufacturing, flexible use manners, high sensitivity and good use effect, and can be used for distributed pressure measurement by means of an optical time domain reflectometer and other measurement instruments.
Description
Technical field
The present invention relates to a kind of pressure transducer, particularly relate to a kind of deformation behaviour of flexible material and microbending loss of optical fiber of utilizing and carry out pressure sensing device.
Background technology
Traditional pressure transducer, the method for gaging pressure is a lot, and foil gauge mensuration, optical measuring method, Hall effect mensuration, optical grating ruler measurement method or the like are arranged.But present many measuring methods all are unfavorable for remote measurement and monitoring, and it is too big disturbed by extraneous forceful electric power signal, and the remote transmission distortion is serious, the measuring mechanism complexity, and poor reliability is unfavorable for safeguarding.In addition, all utilize the method for electrical measurement all to be not suitable for now for inflammable and explosive environment, because any point electric spark all may cause serious fire or explosion accident, cause immeasurable loss.And optical fiber stress sensor has plurality of advantages, is subjected to people's attention.As optical fiber optical grating stress sensor, it is more that people study, and the fiber grating demodulation cost is higher, and application is restricted.
Optical fiber micro-bending sensor is that J.N.Fields in 1980 and J.H.Cole propose first, belongs to intensity modulation type Fibre Optical Sensor.Its principle of work is based on the little curved of optical fiber and the intensity loss of generation.When optical fiber micro-bending, the emergence pattern lotus root is closed, and the guided mode scattering is a radiation mode, thereby produces microbending loss.Optical fiber micro-bending sensor except the advantage of highly sensitive, the anti-electromagnetic interference (EMI) that has general Fibre Optical Sensor to have, corrosion-resistant, essential safety etc., few, the advantages such as cost is low, easy assembling of parts simple in structure in addition, required.Particularly utilize the optical time-domain analyzer technology can also form the distribution type fiber-optic test macro, have very important using value and realistic meaning.
Chinese invention patent CN87107210 discloses a kind of " microbend fiber optic strain gauge ", it is to utilize two to have plate relative, the corrugated surface that staggers mutually, and signal optical fibre that is clipped between the two boards is realized the sensing of stress, its shortcoming is that the concavo-convex ripple of two boards must be aimed at, this just needs some annexes to guarantee, and need aborning to adjust, thereby be unfavorable for reducing cost and producing in enormous quantities.Existing optical fiber micro-bending sensor all is the mechanisms that need two concavo-convex staggered correspondences, and the production that makes optical fiber micro-bending sensor needs higher precision, this is unfavorable for that the cost of such Fibre Optical Sensor reduces and batch process, has hindered the popularization and the use of this type of Fibre Optical Sensor.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of flexible material yielding characteristics under pressure of utilizing, and producing intensity loss during optical fiber micro-bending, pressure changes the optical fiber micro-bending pressure transducer that changes bending loss of optical fiber by the distortion of flexible material.
The technical solution adopted for the present invention to solve the technical problems is: a kind of pressure transducer based on fiber microbending loss is provided, it comprises the elastic plate that is made of flexible material, with the tooth plate with distortion tooth that is made of rigid material, the distortion between cog of described elastic plate and tooth plate accompanies signal optical fibre.
The scheme that the present invention solves further technical matters is: described tooth plate with distortion tooth is made of the embossing metal tape.
The scheme that the present invention solves further technical matters is: be distributed with the ripple parallel with being out of shape tooth on the described surface that accompanies signal optical fibre at distortion between cog elastic plate and tooth plate.
The scheme that the present invention solves further technical matters is: described flexible material is an expanded material, as sponge, bipeltate.
The scheme that the present invention solves further technical matters is: described signal optical fibre is clipped in the middle of two flexible flakes, and they are clipped in the distortion between cog of described elastic plate and tooth plate jointly then.
The scheme that the present invention solves further technical matters is: a sleeve pipe is filled with material water-proof material with the whole parcel of the signal optical fibre of the distortion between cog clamping of described elastic plate and tooth plate and elastic plate and tooth plate in the space of this sleeve pipe.
The scheme that the present invention solves further technical matters is: a reference optical fiber is in described sleeve pipe.
The scheme that the present invention solves further technical matters is: there is outer jacket the outside at described sleeve pipe, and this outer jacket can be a macromolecular material, also can be metal material.
The scheme that the present invention solves further technical matters is: in the outer jacket or between outer jacket and the sleeve pipe reinforcing element is being arranged.
In sum, the present invention is simple in structure, reasonable in design, processing and fabricating convenient and use-pattern is flexible, highly sensitive, result of use is good, compared to prior art, in the production run of the pressure transducer based on fiber microbending loss of the present invention, elastic body does not need accurate the aligning with tooth plate, reduced requirement significantly to technology, equipment, production cost is reduced greatly, and do not influence detection to pressure, elastic body also has the certain protection effect to signal optical fibre simultaneously, prevents the impact of excessive external force to signal optical fibre; When pressure acted on elastic plate, elastic plate can also make signal optical fibre produce flexural deformation, thereby change the bending loss of signal optical fibre according to the distortion tooth distortion of tooth plate simultaneously.Like this pressure signal is converted into light signal,, can realizes far-end measuring or distributed measurement by the signal optical fibre transmission, and the precision height, good reliability.
Below by drawings and Examples, the technical scheme of inventing is described in further detail.
Description of drawings
Fig. 1 is the structural representation of first embodiment of the pressure transducer based on fiber microbending loss of the present invention.
Fig. 2 gets the structural representation of second embodiment for the present invention.
Fig. 3 gets the structural representation of the 3rd embodiment for the present invention.
Fig. 4 gets the structural representation of the 4th embodiment for the present invention.
Description of reference numerals:
The 1-signal optical fibre; The 2-elastic plate; The 3-flexible flake;
The 4-tooth plate; 5-embossing metal tape; 6-elastic plate external waviness
The 10-sleeve pipe; The 20-material water-proof material;
Embodiment
As shown in Figure 1, the present invention includes elastic plate 2 that is made of flexible material and the tooth plate 4 with distortion tooth that is made of rigid material, the distortion between cog of described elastic plate 2 and tooth plate 4 accompanies signal optical fibre 1.During actual processing and fabricating, be distributed with the ripple parallel 6 on the described surface that accompanies signal optical fibre 1 at elastic plate 2 and distortion between cog tooth plate 4 with being out of shape tooth.
In the present embodiment, the described elastic plate 2 that constitutes by flexible material, under pressure, the lower surface of elastic plate 2 is to 4 extruding of described tooth plate, and the distortion tooth on tooth plate 4 can cause the part distortion of elastic plate 2, and the distortion of this part makes and directly acts on the signal optical fibre 1, and cooperate with tooth plate 4, make signal optical fibre 1 produce flexural deformation, thereby change the bending loss of signal optical fibre 1, thereby realize modulation light intensity in the signal optical fibre 1.The existence of the ripple 6 parallel with the distortion tooth on elastic plate 2 can reduce the resistance of elastic plate distortion, thereby change signal optical fibre 1 more yielding bending.Like this pressure signal is converted into light signal,, can realizes far-end measuring or distributed measurement by Optical Fiber Transmission, and the precision height, good reliability.Solve some for example problems such as electromagnetic interference (EMI) simultaneously, thereby also further improve precision, the reliability of sensor and reduce cost, moreover also it can be combined with digitizing, integrated and robotization, develop sensor easy and can widespread use.
As shown in Figure 2, in the present embodiment, as different from Example 1: described tooth plate 4 is to be made of the embossing metal tape; During actual processing and fabricating, make full use of the existing embossing calender of optical cable producer and make the embossing metal tape, can adjust the degree of depth and the pitch of embossing as required, thereby further reduce the implementation cost of this patent.In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 1.
Embodiment 3
As shown in Figure 3; in the present embodiment; as different from Example 1: at described elastic plate 2; and by rigid material constitute have the distortion tooth tooth plate 4 between signal optical fibre 1 on; have two flexible flakes 6 to clamp signal optical fibre 1, so further guard signal optical fiber prevents that in actual use pressure is excessive signal company 1 is caused damage.In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 1.
Embodiment 4
Embodiment 4
As shown in Figure 4, in the present embodiment, as different from Example 1: described sleeve pipe 10 with described elastic plate 2, tooth plate 4 and, the signal optical fibre 1 whole parcel of described elastic plate 2 and 4 clampings of tooth plate is filled with material water-proof material 20 in the space of this sleeve pipe 10.
In the present embodiment, because described sleeve pipe 10 is with elastic plate 2 and tooth plate 4, and signal optical fibre 1 whole parcel, thereby make this sensor can be when actual environment uses, resist the influence of destructive power such as external tensile force, pressure, damaged by rats, thereby really become operable sensor,, be filled with material water-proof material 20 in the inside of sleeve pipe for improving this sensor serviceable life.The structure of remainder, annexation and principle of work are all identical with embodiment 1.
The above; it only is preferred embodiment of the present invention; be not that the present invention is imposed any restrictions, everyly any simple modification that above embodiment did, change and equivalent structure changed, all still belong in the protection domain of technical solution of the present invention according to the technology of the present invention essence.
Claims (10)
1. pressure transducer based on fiber microbending loss is characterized in that: comprise elastic plate that is made of flexible material and the tooth plate with distortion tooth that is made of rigid material, the distortion between cog of described elastic plate and tooth plate accompanies signal optical fibre.
2. according to the described a kind of pressure transducer based on fiber microbending loss of claim 1, it is characterized in that: described tooth plate with distortion tooth is made of the embossing metal tape.
3. according to the described a kind of pressure transducer of claim 1, it is characterized in that based on fiber microbending loss: described on elastic plate, accompany on the surface of signal optical fibre with the distortion between cog of tooth plate and to be distributed with the ripple parallel with being out of shape tooth.
4. according to the described a kind of pressure transducer based on fiber microbending loss of claim 1, it is characterized in that: described flexible material is an expanded material, as sponge, bipeltate.
5. according to the described a kind of pressure transducer based on fiber microbending loss of claim 1, it is characterized in that: described signal optical fibre is clipped in the middle of two flexible flakes, and they are clipped in the distortion between cog of described elastic plate and tooth plate jointly then.
6. according to the described a kind of pressure transducer based on fiber microbending loss of claim 1, it is characterized in that: a sleeve pipe is with the whole parcel of the signal optical fibre of the distortion between cog clamping of described elastic plate and tooth plate and elastic plate and tooth plate.
7. according to the described a kind of pressure transducer of claim 6, it is characterized in that: in the space of described sleeve pipe, be filled with material water-proof material based on fiber microbending loss.
8. according to the described a kind of pressure transducer based on fiber microbending loss of claim 6, it is characterized in that: a reference optical fiber is in described sleeve pipe.
9. according to the described a kind of pressure transducer based on fiber microbending loss of claim 6, it is characterized in that: there is outer jacket the outside at described sleeve pipe, and this outer jacket is macromolecular material or metal material.
10. according to the described a kind of pressure transducer of claim 9, it is characterized in that: in the outer jacket or between outer jacket and the sleeve pipe reinforcing element is being arranged based on fiber microbending loss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101115362A CN102147303A (en) | 2010-02-10 | 2010-02-10 | Pressure sensor based on optical fiber microbending losses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101115362A CN102147303A (en) | 2010-02-10 | 2010-02-10 | Pressure sensor based on optical fiber microbending losses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102147303A true CN102147303A (en) | 2011-08-10 |
Family
ID=44421680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101115362A Pending CN102147303A (en) | 2010-02-10 | 2010-02-10 | Pressure sensor based on optical fiber microbending losses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102147303A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568250A (en) * | 2014-12-24 | 2015-04-29 | 合肥协知行信息系统工程有限公司 | Waveform plate type pressure sensor |
| CN108871658A (en) * | 2017-05-15 | 2018-11-23 | 中兴通讯股份有限公司 | Fibre optic compression sensor, fiber-optic pressure sensor system and pressure measurement method |
| CN108917802A (en) * | 2018-04-08 | 2018-11-30 | 安徽师范大学 | A kind of renewable type optical fiber micro-bending sensing device |
| CN109141491A (en) * | 2018-09-29 | 2019-01-04 | 成都凯天电子股份有限公司 | Pressure-type optical fiber is slightly variable sensor |
| CN109405761A (en) * | 2018-11-14 | 2019-03-01 | 深圳市迈步机器人科技有限公司 | Fibre optical sensor, deformation detecting device, detection method and data glove |
| CN109620186A (en) * | 2019-01-30 | 2019-04-16 | 福州新易达光电科技有限公司 | A kind of optical fiber micro-bending sensor for monitoring human vital sign parameter |
| CN110371835A (en) * | 2019-08-27 | 2019-10-25 | 刘彬 | The optical fiber type pedestrian of a kind of escalator or moving sidewalk passes in and out terraced monitoring device |
| 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 |
| CN111982476A (en) * | 2020-08-31 | 2020-11-24 | 成都泰瑞通信设备检测有限公司 | Stress uniform distribution type optical fiber microbend additional loss testing device, testing system and testing method |
-
2010
- 2010-02-10 CN CN2010101115362A patent/CN102147303A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568250A (en) * | 2014-12-24 | 2015-04-29 | 合肥协知行信息系统工程有限公司 | Waveform plate type pressure sensor |
| CN108871658A (en) * | 2017-05-15 | 2018-11-23 | 中兴通讯股份有限公司 | Fibre optic compression sensor, fiber-optic pressure sensor system and pressure measurement method |
| CN108917802A (en) * | 2018-04-08 | 2018-11-30 | 安徽师范大学 | A kind of renewable type optical fiber micro-bending sensing device |
| CN109141491A (en) * | 2018-09-29 | 2019-01-04 | 成都凯天电子股份有限公司 | Pressure-type optical fiber is slightly variable sensor |
| CN109405761A (en) * | 2018-11-14 | 2019-03-01 | 深圳市迈步机器人科技有限公司 | Fibre optical sensor, deformation detecting device, detection method and data glove |
| CN109620186A (en) * | 2019-01-30 | 2019-04-16 | 福州新易达光电科技有限公司 | A kind of optical fiber micro-bending sensor for monitoring human vital sign parameter |
| CN110371835A (en) * | 2019-08-27 | 2019-10-25 | 刘彬 | The optical fiber type pedestrian of a kind of escalator or moving sidewalk passes in and out terraced monitoring device |
| 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 |
| CN111982476A (en) * | 2020-08-31 | 2020-11-24 | 成都泰瑞通信设备检测有限公司 | Stress uniform distribution type optical fiber microbend additional loss testing device, testing system and testing method |
| CN111982476B (en) * | 2020-08-31 | 2021-03-12 | 成都泰瑞通信设备检测有限公司 | Stress uniform distribution type optical fiber microbend additional loss testing device, system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102147303A (en) | Pressure sensor based on optical fiber microbending losses | |
| CN201392418Y (en) | Composite sensing optical cable | |
| CN102878943B (en) | The multiple sensing system of fiber strain integration calibrating installation of large scale and method | |
| CN202511764U (en) | High-sensitivity fiber grating strain sensor | |
| CN202720369U (en) | Distributed strain and temperature monitoring optical cable laid along object surface | |
| CN105043264A (en) | Fiber optic displacement sensor based on macro-bending loss effect | |
| CN203940942U (en) | A kind of distributed fiberoptic sensor | |
| CN101852904A (en) | Pressure-sensitive optical cable with armor layer | |
| CN203465450U (en) | Strain and temperature dual-parameter optical cable | |
| CN102162886A (en) | Pressure-sensitive optical cable and manufacture method thereof | |
| CN114486020B (en) | Flexible surface pressure sensor based on optical waveguide | |
| CN201444039U (en) | Micro fiber grating displacement sensor | |
| CN101922948A (en) | Multilayer high-precision optical fiber detector based on microbending loss | |
| CN202485696U (en) | Cylindrical microbend modulator and optical fiber microbend sensor with same | |
| CN103134626A (en) | Inhaul cable stress monitoring device | |
| CN201772967U (en) | Fiber stress sensing device based on corrugated pipe | |
| CN208059805U (en) | A kind of civil engineering fiber grating expansion joint test system | |
| CN104019928B (en) | Seriation cushion layer structure optical fiber micro-bending sensor | |
| CN103162636A (en) | Tunnel deformation monitoring device | |
| CN202692951U (en) | Fiber bragg grating bending sensor for monitoring stress deformation of flexible protective screen | |
| CN203480088U (en) | Force strain transmission optical cable capable of reducing temperature influence | |
| CN201732192U (en) | Armor sensing optical cable | |
| CN102384805A (en) | Spring stress monitoring device based on optical fiber bend loss | |
| CN202372282U (en) | Force value monitoring device | |
| CN201773200U (en) | Pressure-sensitive type optical cable with armor layer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110810 |