CN202304853U - Optical fiber sensing device with wide dynamic range - Google Patents
Optical fiber sensing device with wide dynamic range Download PDFInfo
- Publication number
- CN202304853U CN202304853U CN2011204138116U CN201120413811U CN202304853U CN 202304853 U CN202304853 U CN 202304853U CN 2011204138116 U CN2011204138116 U CN 2011204138116U CN 201120413811 U CN201120413811 U CN 201120413811U CN 202304853 U CN202304853 U CN 202304853U
- Authority
- CN
- China
- Prior art keywords
- light source
- optical
- fibre
- signal
- sensing device
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses an optical fiber sensing device with a wide dynamic range. The device comprises an upper tooth plate, a lower tooth plate, a signal optical fiber sandwiched between the two tooth plates, a light source module and a light detector, wherein the light source module and the light detector are connected with a signal optical fiber; the light source module at least comprises two light sources; and the wavelengths of light signals emitted by each light source and entering the signal optical fiber are different. By utilizing different loss of the light signals with different wavelengths, the dynamic range of the slightly bent optical fiber sensing device can be widened.
Description
Technical field
The utility model belongs to technical field of optical fiber sensing, is specifically related to a kind of change based on light signal strength, great dynamic range fibre-optical sensing device.
Background technology
It has plurality of advantages and becomes one of focus of current domestic and international research Fibre Optical Sensor dress device owing to traditional relatively sensing, the bending that wherein changes, the sensing device of little curved principle based on light signal strength with respect to other Fibre Optical Sensors have simple in structure, light path is sealed, cost is low, be easy to make up advantage such as distributed sensing device.Though the microbend fiber sensor has had bigger test dynamic range; But the time to large deformation such as landslide, rubble flow, earthquake and large-sized artificial buildings, long-term monitoring; Still can run into the not enough problem of test dynamic range; If can address this problem, then can prolong the microbend fiber sensing device serviceable life of having laid on the one hand, can reduce cost significantly again.
Summary of the invention
In order to overcome the deficiency of above-mentioned prior art; The utility model provides a kind of fibre-optical sensing device with great dynamic range; Loss when utilizing wavelength optical signals in microbend fiber, to transmit varies in size, thereby can expand the dynamic range of microbend fiber sensing device, has promptly kept the high-precision characteristics of microbend fiber sensing device; Do not influence its advantage cheaply again, for promoting the use of of such fibre-optical sensing device provides good basis.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of fibre-optical sensing device with great dynamic range; Comprise tooth plate, lower tooth plate and be clamped in two signal optical fibres between tooth plate; Light source module that is connected with signal optical fibre and photo-detector; Described light source module comprises two light sources at least, and the wavelength that described each light source sent, incide the light signal in the signal optical fibre is different.
Be mounted with optical branching device in the described light source module, the input end of said optical branching device is connected with light source, and output terminal is connected with signal optical fibre.
Be mounted with photoswitch in the described light source module, the input end of described photoswitch is connected with each light source, and the public output of photoswitch is connected with signal optical fibre.
One end of described signal optical fibre is mounted with light reflecting device.
Be provided with optical filter between described photo-detector and signal optical fibre, the light wave filter range of described optical filter has covered the wavelength of a light signal that light source sent in the light source module at least.
What settle in the described light source module is gas laser light source, Solid State Laser light source, dye laser light source, semiconductor laser light resource or their combination.
Be not only the fibre-optical sensing device of little curved type, so long as, all can adopt the purpose that said apparatus reaches increases the test dynamic range based on light signal strength, relevant fibre-optical sensing device with wavelength of optical signal.
The utility model compared with prior art has the following advantages:
1, the fibre-optical sensing device that has great dynamic range; Two or more through settling, send the wavelength of optical signal different fibers; Just can significantly increase the test dynamic range of fibre-optical sensing device, improve precision, prolonged serviceable life of fibre-optical sensing device;
2, the fibre-optical sensing device that has great dynamic range, simple in structure, precision is high, long service life, be more conducive to promote the use of;
In sum; The utility model is simple in structure, reasonable in design, highly sensitive, result of use is good; Fibre-optical sensing device with great dynamic range can have bigger potentiality and adapt to complicated actual application environment, makes device of the present invention have better precision, longer serviceable life.
Through accompanying drawing and embodiment, the technical scheme of utility model is done further detailed description below.
Description of drawings
Fig. 1 is the synoptic diagram of the utility model first embodiment.
Fig. 2 is the synoptic diagram of the utility model second embodiment.
Fig. 3 is the synoptic diagram of the utility model the 3rd embodiment.
Fig. 4 is the synoptic diagram of the utility model the 4th embodiment.
Description of reference numerals:
The 1-extended fiber; 2-photodetection module; The 3-light source module;
The 4-lower tooth plate; The last tooth plate of 5-; The 6-signal optical fibre;
7-first light source; The 8-secondary light source; 9-first optical branching device;
The 10-optical filter; The 11-reflective optical system; The 12-controlled processing unit; 15-second optical branching device;
The 20-photoswitch;
Embodiment
Embodiment 1
As shown in Figure 1; The utility model comprises tooth plate 5, lower tooth plate 4 and is clamped in two signal optical fibres 6 between tooth plate; The light source module 3 and the photo-detector 2 that are connected with signal optical fibre 6; Particularly: described light source module 3 comprises two light sources at least, and the wavelength that described each light source sent, incide in the signal optical fibre 6 light signal is different, wherein the wavelength of the light signal that sent greater than secondary light source 8 of the wavelength of optical signal of first light source, 7 outputs; First light source 7 and secondary light source 8 are connected with signal optical fibre 6 through first optical branching device 9, extended fiber 1, and controlled processing unit 12 is electrically connected with light source module 3 and photo-detector 2.
Wavelength optical signals has when transmitting in the crooked signal optical fibre 6 same; The wavelength of light signal is long more, and its bending loss is big more, utilizes this characteristics; In the microbend fiber sensing device; The light signal that can earlier first light source 7 be exported is coupled in the signal optical fibre 6, and along with the variation of measured physical quantity, the loss of light signal is also changing; When the optical signals output of first light source 7, that be coupled in the signal optical fibre 6 increases to a certain degree and can't be by photo-detector 2 monitorings the time in bending loss; The light signal of secondary light source 8 output is coupled into continues in the signal optical fibre 6 so just to have enlarged the dynamic range of this microbend fiber sensing device, prolonged the serviceable life of this fibre-optical sensing device by photo-detector 2 monitorings.Adopt the semiconductor laser light resource of wavelength 1550nm like first light source; What secondary light source adopted is the semiconductor laser light resource of 1310nm; What the photo-detector module adopted is the photoelectrical coupler that can detect 750-1700nm wavelength light signal, just can realize the purpose of above-mentioned expansion microbend fiber sensing device monitoring dynamic range.
As shown in Figure 2, in the present embodiment, different with embodiment 1 is: light source module 3 and photo-detector 2 are connected with signal optical fibre 6 through second optical branching device 15, extended fiber 1, are mounted with reflective optical system 11 at the other end of signal optical fibre 6.The light signal that then sends in the light source module 3 returns again at reflective optical system 11 through the light signal of second optical branching device, 15 entering signal optical fiber 6; And through in second optical branching device, the 15 entering photo-detectors 2; Because 2 processes of light signal signal optical fibre 6 is so further increased the precision and the sensitivity of this microbend sensor.In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 1.
As shown in Figure 3; In the present embodiment; Comprise tooth plate 5, lower tooth plate 4 and be clamped in two signal optical fibres 6 between tooth plate, described signal optical fibre 6 is connected with photo-detector 2 with light source module 3, and particularly: described light source module 3 comprises two light sources at least; And the wavelength that described each light source sent, incide the light signal of signal optical fibre interior 6 is different; The wavelength of the light signal that sent greater than secondary light source 8 of the wavelength of optical signal of first light source 7 output wherein, first light source 7 and secondary light source 8 are connected with signal optical fibre 6 through first optical branching device 9, extended fiber 1, and controlled processing unit 12 is electrically connected with optical filter 10 and photo-detector 2.
Before photodetection module 2, be mounted with optical filter 10, the light signal filtering that optical filter 10 is sent the secondary light source in the light source module 38, and the light signal that allows first light source 7 to be sent passes through.
The light signal of first light source, 7 outputs is coupled in the signal optical fibre 6; Variation along with measured physical quantity; The loss of light signal is also changing; When the optical signals output of first light source 7, that be coupled in the signal optical fibre 6 increases to a certain degree and can't be by photo-detector 2 monitorings the time, controlled processing unit 12 control optical filters 10 allow the light signal of secondary light sources 8 outputs to pass through, in the photo-detector 2 of going forward side by side in bending loss; So just enlarge the dynamic range of this microbend fiber sensing device, prolonged the serviceable life of this fibre-optical sensing device.Adopt the semiconductor laser light resource of wavelength 1550nm like first light source; What secondary light source adopted is the semiconductor laser light resource of 1310nm; What the photo-detector module adopted is the photoelectrical coupler that can detect 750-1700nm wavelength light signal, just can realize the purpose of above-mentioned expansion microbend fiber sensing device monitoring dynamic range.
As shown in Figure 6, in the present embodiment, different with embodiment 1 is: be mounted with photoswitch 20 in the light source module 3, the input end of said photoswitch 20 is connected with light source 8 with light source 7 respectively, and photoswitch 20 public outputs are connected with signal optical fibre 6.
In the present embodiment, the structure of remainder, annexation and principle of work are all identical with embodiment 1.
All similar with the microbend fiber sensing device in its testing process of intensity type fibre-optical sensing device, the variation of its light signal strength is also all relevant with the length of wavelength of optical signal, also can adopt method of the present invention to enlarge the dynamic range of its fibre-optical sensing device.
The above; It only is the preferred embodiment of the utility model; Be not that the utility model is done any restriction; Everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection domain of the utility model technical scheme according to the utility model technical spirit.
Claims (6)
1. fibre-optical sensing device with great dynamic range; Comprise tooth plate, lower tooth plate and be clamped in two signal optical fibres between tooth plate; Light source module that is connected with signal optical fibre and photo-detector; It is characterized in that: described light source module comprises two light sources at least, and the wavelength that described each light source sent, incide the light signal in the signal optical fibre is different.
2. fibre-optical sensing device according to claim 1 is characterized in that: be mounted with optical branching device in the described light source module, the input end of said optical branching device is connected with light source, and output terminal is connected with signal optical fibre.
3. fibre-optical sensing device according to claim 1 is characterized in that: be mounted with photoswitch in the described light source module, the input end of described photoswitch is connected with each light source, and the public output of photoswitch is connected with signal optical fibre.
4. fibre-optical sensing device according to claim 1 is characterized in that: an end of described signal optical fibre is mounted with light reflecting device.
5. fibre-optical sensing device according to claim 1; It is characterized in that: be provided with optical filter between described photo-detector and signal optical fibre, the light wave filter range of described optical filter has covered the wavelength of a light signal that light source sent in the light source module at least.
6. fibre-optical sensing device according to claim 1 is characterized in that: what settle in the described light source module is gas laser light source, Solid State Laser light source, dye laser light source, semiconductor laser light resource or their combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204138116U CN202304853U (en) | 2011-10-26 | 2011-10-26 | Optical fiber sensing device with wide dynamic range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204138116U CN202304853U (en) | 2011-10-26 | 2011-10-26 | Optical fiber sensing device with wide dynamic range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202304853U true CN202304853U (en) | 2012-07-04 |
Family
ID=46373732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204138116U Expired - Fee Related CN202304853U (en) | 2011-10-26 | 2011-10-26 | Optical fiber sensing device with wide dynamic range |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202304853U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104008629A (en) * | 2013-02-22 | 2014-08-27 | 苏州南智传感科技有限公司 | Precaution device for geological disaster events |
| CN109507117A (en) * | 2018-11-12 | 2019-03-22 | 中国科学技术大学 | A kind of micro-nano image checking experimental provision based on optoacoustic beam shaping |
-
2011
- 2011-10-26 CN CN2011204138116U patent/CN202304853U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104008629A (en) * | 2013-02-22 | 2014-08-27 | 苏州南智传感科技有限公司 | Precaution device for geological disaster events |
| CN109507117A (en) * | 2018-11-12 | 2019-03-22 | 中国科学技术大学 | A kind of micro-nano image checking experimental provision based on optoacoustic beam shaping |
| CN109507117B (en) * | 2018-11-12 | 2020-04-03 | 中国科学技术大学 | Micro-nano imaging detection experimental device based on photoacoustic beam shaping |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203149147U (en) | Optical device and optical module | |
| CN103674117B (en) | Measure entirely method and device with weak optical fiber Bragg grating temperature and strain based on Raman scattering simultaneously | |
| CN102261966B (en) | Fluorescent optical fiber temperature measurement optical system | |
| CN105043525A (en) | Laser speckle-based vibration information detection method | |
| CN104406573A (en) | Coreless optical fiber-based tilt angle sensor capable of discriminating direction | |
| CN103776475A (en) | Optical fiber sensor and sensing method based on linear filter and photoelectric detector | |
| CN110375781A (en) | The self-adapting data acquisition system of variable measurement range in a kind of OFDR | |
| CN202304853U (en) | Optical fiber sensing device with wide dynamic range | |
| CN102141512A (en) | Refractive index sensor of micro/nano optical fiber | |
| CN104833314A (en) | High-resolution optical fiber strain sensor and measuring method | |
| CN102589483A (en) | Method and device for sensing angular displacement of reflective differential intensity modulating optical fiber | |
| CN104501908A (en) | Photoelectric sensor detecting liquid level | |
| CN201184868Y (en) | Micro-resonant cavity photo-sensor | |
| CN101458100A (en) | Demodulation system of FBG sensor and demodulation method thereof | |
| CN203785693U (en) | Optical fiber sensor based on linear filter and photoelectric detectors | |
| CN103076032A (en) | Optical-fiber sensing device with large dynamic range and operation method thereof | |
| CN103208732A (en) | Point changing device for semiconductor saturable absorptive mirror (SESAM) for laser and point changing method thereof | |
| CN204313929U (en) | A kind of photoelectric sensor detecting liquid level | |
| CN214502497U (en) | Fiber grating-based segmented demodulation device | |
| CN101893489A (en) | Double-wavelength type optical fiber temperature sensor with light compensation structure | |
| CN103808338A (en) | Large dynamic range optical fiber sensing device based on mode field diameter difference | |
| CN211402137U (en) | Humidity sensor based on polymer optical fiber mode interferometer | |
| CN102692268A (en) | Distributed optical fiber vibration sensor for structural vibration detection | |
| CN203287318U (en) | Optical fiber sensing device of fluorescence method | |
| CN103123406A (en) | Optical fiber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120704 Termination date: 20121026 |