CN103925985A - Vibrating sensor based on core-free optical fiber and detection device based on vibrating sensor - Google Patents
Vibrating sensor based on core-free optical fiber and detection device based on vibrating sensor Download PDFInfo
- Publication number
- CN103925985A CN103925985A CN201410144060.0A CN201410144060A CN103925985A CN 103925985 A CN103925985 A CN 103925985A CN 201410144060 A CN201410144060 A CN 201410144060A CN 103925985 A CN103925985 A CN 103925985A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- fiber
- section
- core
- vibrating sensor
- 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
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a vibrating sensor based on a core-free optical fiber and a detection device based on the vibrating sensor. The vibrating sensor comprises a first optical fiber, the core-free optical fiber section, a third optical fiber and a thin pipe section, wherein the first optical fiber, the core-free optical fiber section and the third optical fiber are welded in sequence; the core-free optical fiber section is 0.5-10 cm long; the diameter of the solid cladding layer of the core-free optical fiber section is smaller than the outer diameter of the first optical fiber; the core-free optical fiber section is located inside the thin pipe section; the two ends of the thin pipe section are bonded with a coating layer of the first optical fiber and a coating layer of the second optical fiber respectively. The detection device based on the vibrating sensor comprises the vibration sensor based on the core-free optical fiber, a light source and a spectrometer. The vibrating sensor overcomes the defects that an ordinary vibrating sensor is complex in process, the flexibility is limited and the dynamic range is small, has the advantages of being high in flexibility, simple and firm in structure and easy to manufacture, can carry out high-precision vibration frequency detection within a large range, and can achieve large-scale standard manufacturing production.
Description
Technical field
The present invention relates to sensory field of optic fibre, relate in particular to a kind of vibration transducer and pick-up unit thereof based on coreless fiber.
Background technology
Along with the development of optical fiber sensing technology in recent decades, Fibre Optical Sensor can have been realized the detection of tens physical quantitys and applied to gradually the fields such as communication, engineering, physical parameters measurement.It is one of focus of research now that Fibre Optical Sensor is realized the detection of vibration wave.Along with current social development, the Real-Time Monitoring of the structural health situation of infrastructure has been had to more and more higher requirement, such as the monitoring of bridge vibration and stress, motor oscillating monitoring, transformer vibration monitoring etc., also requires sensor can under complex electromagnetic environment, carry out reliable and stable many reference amounts simultaneously and measures.Under such requirement, Fibre Optical Sensor highlights a lot of advantages compared to traditional sensors, such as not being subject to electromagnetic interference (EMI), volume little, lightweight, corrosion-resistant etc.Fibre Optical Sensor has obtained application more and more widely thus.
Coreless fiber is a kind of novel optical fiber, different from the ordinary optic fibre of fibre core-cladding structure, this optical fiber is a kind of quartz fibre with even material, there is no fibre core, only by solid covering and coat, formed, the layered characteristic causing without refringence, covering and coat have respectively pure fused silica material and polymeric material to make, and coat can be easy to be stripped from.
Coreless fiber vibration transducer is as a member in Fibre Optical Sensor family, it is except having the advantage of existing traditional fiber sensor, also have larger dynamic range, higher precision and sensitivity, can remote measurement etc. advantage, caused that researcher pays close attention to more and more widely.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of vibration transducer based on coreless fiber, can overcome common vibration transducer sensitvity constraint problem, and improve dynamic range.
For solving the problems of the technologies described above, the invention provides a kind of vibration transducer based on coreless fiber, comprise the first optical fiber, coreless fiber section, the 3rd optical fiber and capillary tube segment, described the first optical fiber, coreless fiber section, the 3rd optical fiber order welding, the single-mode fiber that described the first optical fiber, the 3rd optical fiber are same specification, the length of described coreless fiber section is 0.5 centimetre～10 centimetres, and the solid cladding diameter of coreless fiber section is less than described the first optical fiber external diameter; Described coreless fiber section is positioned at described capillary tube segment, and the two ends of described capillary tube segment bond with the coat of described the first optical fiber, the 3rd optical fiber respectively.
Preferably, described capillary tube segment is quartz capillary section.The coat of described capillary tube segment and the first optical fiber, the 3rd optical fiber adopts epoxy resin or ultraviolet glue bonding.
The present invention also provides a kind of pick-up unit of the described vibration transducer based on coreless fiber, it is characterized in that, comprise described vibration transducer, light source and frequency spectrograph based on coreless fiber, described light source is connected respectively described vibration transducer two ends with described frequency spectrograph, and described vibration transducer is fixed on detected vibration source.
Vibration transducer based on coreless fiber of the present invention, utilized the interior coreless fiber of sensor to be subject to generation of vibration micro-curved, and coreless fiber and air in chamber are because the different equivalent of refractive index becomes a kind of multimode optical fiber, pattern based on single mode-multi-mode-single mode structure is interfered and then vibration signal is modulated to the characteristic on light signal, realized the vibrating sensing based on intensity modulated, this method has overcome utilizes multimode optical fiber to realize the low problem of sensor measuring sensitivity by cladding mode, also overcome by eroding multimode optical fiber covering and by external environment, served as the process complexity of covering simultaneously, reduced to a certain extent error.
The advantage that the present invention is based on the pick-up unit of above-mentioned vibration transducer be simple in structure firmly, cost is low, product success ratio height is workable, highly sensitive, anti-electromagnetic interference capability strong, measure that dynamic range is large, measuring accuracy is high, can remote measurement.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is further described in detail.
Fig. 1 is the vibration transducer schematic diagram based on coreless fiber of the present invention.
Fig. 2 is the structure of the detecting device figure of the vibration transducer based on coreless fiber of the present invention.
Wherein 1---the first single-mode fiber, 2---coreless fiber, 3---the 3rd single-mode fiber, 4---quartz capillary, 5---bonding agent, 6---light source, 7---vibration source, 8---vibration transducer, 9---frequency spectrograph.
Embodiment
As shown in Figure 1, the first single-mode fiber 1, coreless fiber section 2, the 3rd single-mode fiber 3 order weldings, the single-mode fiber that the first single-mode fiber, the 3rd single-mode fiber are same specification, the length of coreless fiber section is 0.5 centimetre～10 centimetres, and the solid cladding diameter of coreless fiber section is less than the first single-mode fiber external diameter; The unsettled quartz capillary section 4 that is positioned at of coreless fiber section 2, the two ends of quartz capillary section 4 bond by bonding agent 5 with the coat of the first single-mode fiber, the 3rd single-mode fiber respectively.Coreless fiber 2 is unsettled in quartz capillary 4, avoids environmental interference.Bonding agent 5 adopts epoxy resin or ultraviolet glue.
Figure 2 shows that the pick-up unit of the vibration transducer based on coreless fiber of the present invention, it comprises and can measure coreless fiber sensor 8 to vibration frequency, light source 6 and frequency spectrograph 9.Wherein light source 6 is connected respectively coreless fiber sensor 8 two ends with frequency spectrograph 9, and coreless fiber sensor is fixed on vibration source 7.
The course of work of pick-up unit that the present invention is based on the vibration transducer of coreless fiber is, light source 6 incides light in sensor 8, when sensor is subject to from vibration source 7 vibration, coreless fiber 2 in kapillary 4 is subject to effect of vibration and occurs micro-curved, cause that patterns of change forms multiple-mode interfence, thereby cause that light intensity changes, and realizes light intensity is modulated, by 9 pairs of signals of frequency spectrograph, process, can obtain the precise frequency of vibration.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (4)
1. the vibration transducer based on coreless fiber, it is characterized in that, comprise the first optical fiber, coreless fiber section, the 3rd optical fiber and capillary tube segment, described the first optical fiber, coreless fiber section, the 3rd optical fiber order welding, the single-mode fiber that described the first optical fiber, the 3rd optical fiber are same specification, the length of described coreless fiber section is 0.5 centimetre～10 centimetres, and the solid cladding diameter of coreless fiber section is less than described the first optical fiber external diameter; Described coreless fiber section is positioned at described capillary tube segment, and the two ends of described capillary tube segment bond with the coat of described the first optical fiber, the 3rd optical fiber respectively.
2. the vibration transducer based on coreless fiber according to claim 1, is characterized in that, described capillary tube segment is quartz capillary section.
3. the vibration transducer based on coreless fiber according to claim 1 and 2, is characterized in that, the coat of described capillary tube segment and the first optical fiber, the 3rd optical fiber adopts epoxy resin or ultraviolet glue bonding.
4. the pick-up unit of the vibration transducer based on coreless fiber described in a claim 1, it is characterized in that, comprise described vibration transducer, light source and frequency spectrograph based on coreless fiber, described light source is connected respectively described vibration transducer two ends with described frequency spectrograph, and described vibration transducer is fixed on detected vibration source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410144060.0A CN103925985A (en) | 2014-04-10 | 2014-04-10 | Vibrating sensor based on core-free optical fiber and detection device based on vibrating sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410144060.0A CN103925985A (en) | 2014-04-10 | 2014-04-10 | Vibrating sensor based on core-free optical fiber and detection device based on vibrating sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103925985A true CN103925985A (en) | 2014-07-16 |
Family
ID=51144284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410144060.0A Pending CN103925985A (en) | 2014-04-10 | 2014-04-10 | Vibrating sensor based on core-free optical fiber and detection device based on vibrating sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103925985A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104960552A (en) * | 2015-06-25 | 2015-10-07 | 北京交通大学 | Unmanned watching system for railway on-site operation protection based on coreless optical fiber sensing |
| CN106248194A (en) * | 2016-07-22 | 2016-12-21 | 华中科技大学 | A kind of vibration measurement device based on coreless fiber |
| CN106482808A (en) * | 2016-09-12 | 2017-03-08 | 武汉工程大学 | A kind of liquid level sensor based on quartzy glass capillary and preparation method |
| CN106592428A (en) * | 2016-11-29 | 2017-04-26 | 北京恒润生工程科技有限公司 | Intelligent guy cable based on coreless optical fiber perception, and preparation method of intelligent guy cable |
| CN108279079A (en) * | 2018-01-08 | 2018-07-13 | 东北大学 | A kind of point type temperature sensing device coating dimethyl silicone polymer based on coreless fiber radial direction serious mistake bit architecture |
| CN109142278A (en) * | 2018-09-14 | 2019-01-04 | 华北电力大学（保定） | A kind of measurement method of seawater salinity |
| CN114152327A (en) * | 2021-12-13 | 2022-03-08 | 中国科学院光电技术研究所 | Vibration detection method based on cavity ring-down technology |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007015324A1 (en) * | 2005-08-01 | 2007-02-08 | Tama-Tlo, Ltd. | Microphone element |
| CN101308042A (en) * | 2007-05-16 | 2008-11-19 | 日立电线株式会社 | Optical fiber vibration sensor |
| CN101729967A (en) * | 2009-12-17 | 2010-06-09 | 天津大学 | Acousto-optic conversion method and optical microphone based on multiple-mode interference |
| CN102636250A (en) * | 2012-03-29 | 2012-08-15 | 暨南大学 | Optical fiber vector vibration sensor |
-
2014
- 2014-04-10 CN CN201410144060.0A patent/CN103925985A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007015324A1 (en) * | 2005-08-01 | 2007-02-08 | Tama-Tlo, Ltd. | Microphone element |
| CN101308042A (en) * | 2007-05-16 | 2008-11-19 | 日立电线株式会社 | Optical fiber vibration sensor |
| CN101729967A (en) * | 2009-12-17 | 2010-06-09 | 天津大学 | Acousto-optic conversion method and optical microphone based on multiple-mode interference |
| CN102636250A (en) * | 2012-03-29 | 2012-08-15 | 暨南大学 | Optical fiber vector vibration sensor |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104960552A (en) * | 2015-06-25 | 2015-10-07 | 北京交通大学 | Unmanned watching system for railway on-site operation protection based on coreless optical fiber sensing |
| CN106248194A (en) * | 2016-07-22 | 2016-12-21 | 华中科技大学 | A kind of vibration measurement device based on coreless fiber |
| CN106482808A (en) * | 2016-09-12 | 2017-03-08 | 武汉工程大学 | A kind of liquid level sensor based on quartzy glass capillary and preparation method |
| CN106592428A (en) * | 2016-11-29 | 2017-04-26 | 北京恒润生工程科技有限公司 | Intelligent guy cable based on coreless optical fiber perception, and preparation method of intelligent guy cable |
| CN108279079A (en) * | 2018-01-08 | 2018-07-13 | 东北大学 | A kind of point type temperature sensing device coating dimethyl silicone polymer based on coreless fiber radial direction serious mistake bit architecture |
| CN109142278A (en) * | 2018-09-14 | 2019-01-04 | 华北电力大学（保定） | A kind of measurement method of seawater salinity |
| CN114152327A (en) * | 2021-12-13 | 2022-03-08 | 中国科学院光电技术研究所 | Vibration detection method based on cavity ring-down technology |
| CN114152327B (en) * | 2021-12-13 | 2023-12-22 | 中国科学院光电技术研究所 | Vibration detection method based on cavity ring-down technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103925985A (en) | Vibrating sensor based on core-free optical fiber and detection device based on vibrating sensor | |
| US11112316B2 (en) | Optical fiber temperature sensor | |
| CN103439765B (en) | A kind of All-optical-fiber type multi-path interferometer | |
| CN103940530B (en) | A kind of temperature sensor based on hollow annular waveguide fiber | |
| CN104297839A (en) | Pohotonic crystal fiber and pohotonic crystal fiber sensor | |
| CN205262638U (en) | A two core photonic crystal optical fiber sensor for being directed at temperature and simultaneous measurement of meeting an emergency | |
| CN105371981A (en) | Inner wall-silver plated and liquid crystal-filled hollow optical fiber surface plasmon resonance temperature sensor | |
| CN103969221A (en) | Optical fiber refractive index sensor based on single mode-fine core-multimode-single mode structure | |
| CN103162722A (en) | Microfiber Fabry-Perot microcavity sensor and manufacturing method | |
| CN102768200A (en) | Optical fiber humidity sensor used on humidity detection device and manufacture method thereof | |
| CN203587177U (en) | Optical fiber liquid level sensor | |
| CN103411542A (en) | Optical fiber micrometric displacement sensor based on Mach-Zehnder interference and manufacturing method of optical micrometric displacement sensor | |
| CN108801306A (en) | Fibre optical sensor and preparation method thereof, motion sensing apparatus | |
| CN106706111B (en) | Acoustic emission sensor and acoustic emission signal detection method | |
| CN210427778U (en) | Double-core optical fiber magnetic field sensing probe | |
| CN113091970B (en) | Self-healing intelligent all-optical flexible diaphragm | |
| CN103278098A (en) | Ultra-precision micro-displacement sensing system and processing method based on double-FBG suspended type probe structure | |
| CN202794029U (en) | Optical fiber humidity sensor for humidity detection device | |
| CN208238740U (en) | The tapered optical fibre bending sensor of dual hump | |
| CN105353165A (en) | Fiber accelerometer based on MEMS technology | |
| CN203719653U (en) | Inclination-angle sensor of photonic-crystal optical fiber on basis of demodulation of optical-fiber Bragg grating | |
| CN101109663A (en) | Optical fiber temperature sensor based on bending loss | |
| CN105548611A (en) | Optical fiber F-P cavity acceleration sensor with temperature self-compensation function | |
| CN203364764U (en) | Ultra-precision micro-displacement sensing system based on double-FBG suspended probe structure | |
| CN110455748A (en) | Light fibre humidity transducer based on Mach-Zahnder interference |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140716 |