CN206523645U - A kind of optical fiber detector for structure of being shaken with laterally limit - Google Patents
A kind of optical fiber detector for structure of being shaken with laterally limit Download PDFInfo
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- CN206523645U CN206523645U CN201720150036.7U CN201720150036U CN206523645U CN 206523645 U CN206523645 U CN 206523645U CN 201720150036 U CN201720150036 U CN 201720150036U CN 206523645 U CN206523645 U CN 206523645U
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- optical fiber
- coupler
- mass
- shaken
- mounting seat
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Abstract
The utility model discloses a kind of optical fiber detector for structure of being shaken with laterally limit, including mounting seat, input optical fibre, output optical fibre and pickup arm, installation cavity is provided with the mounting seat, the pickup arm is adjacent in installation cavity, the pickup arm is provided with mass, the upper and lower ends of the mass are provided with elastic, lateral-limiting-shake spring is set with the middle part of the mass, coupler is installed in the mounting seat, the coupler includes the first coupler and the second coupler, the input optical fibre connects the first coupler, and export a pair of winding optical fiber, the pair of winding optical fiber is respectively wound around on elastic and is connected with the second coupler, second coupler output connects output optical fibre.The utility model provides a kind of application fiber interference principle to vibration signals collecting, and with small volume, sensitivity is high, precision is high, dynamic range is big, electromagnetism interference, the optical fiber detector for laterally limiting the advantage shaken.
Description
Technical field
The utility model is related to technical field of optical fiber detection, more particularly to a kind of optical fiber detection for structure of being shaken with laterally limit
Device.
Background technology
Earthquake monitoring needs high sensitivity, high-precision low-frequency acoustic monitoring means, and fibre-optic geophone belongs to
Geophone of new generation；Mineral resource reconnaissance needs to be equipped with high-performance wave detector.Vibration survey is carried out using fibre coherence technique
Amount is that a kind of high sensitivity, high accuracy, dynamic range be big, the metering system of electromagnetism interference, small volume, many countries and regions
Also it is classified as one of emphasis research and development technology.Zhang Wentao et al. (push-pull detector, the patent No.：201110194952.8) propose
A kind of wave detector of push-pull type structure, using diaphragm mode as flexible member, between diaphragm and optical fiber can not direct-coupling,
The third adhesive is must be added to, sensitivity and the service life of wave detector is reduced.Zhao says a kind of peak et al. (Michelson
The sensing element of fibre optic interferometer, the patent No.：201320571206.0) propose available for michelson interferometer measurement shake
Dynamic paravariable column body sensing element, but do not add laterally limit and shake structure, making the transversal effect of its vibration measurement can not remove.
Utility model content
In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a kind of application fiber interference principle to vibration
Signal acquisition, with small volume, sensitivity is high, precision is high, dynamic range is big, electromagnetism interference, the light for laterally limiting the advantage shaken
Fine wave detector.
The utility model solve technical scheme that its technical problem used for：
A kind of optical fiber detector for structure of being shaken with laterally limit, including mounting seat, input optical fibre, output optical fibre and sensing
Installation cavity is provided with arm, the mounting seat, the pickup arm is adjacent in installation cavity, the pickup arm is provided with mass,
The upper and lower ends of the mass are provided with the middle part of elastic, the mass and are set with lateral-limiting-shake spring, the mounting seat
Coupler is inside installed, the coupler includes the first coupler and the second coupler, and the input optical fibre connection first is coupled
Device, and a pair of winding optical fiber are exported, the pair of winding optical fiber is respectively wound around on elastic and is connected with the second coupler,
Second coupler output connects output optical fibre.
As the improvement of above-mentioned technical proposal, the mass is cylindrical, the mass include the first mass and
Second mass, first mass is arranged on the second mass by a contiguous block.
As the improvement of above-mentioned technical proposal, the lateral-limiting-shake spring is sleeved on contiguous block, and is fixed by screws in
In mounting seat.
It is used as the improvement of above-mentioned technical proposal, it is characterised in that：The lateral-limiting-shake spring be copper sheet, thickness be 0.01~
0.2mm。
As the improvement of above-mentioned technical proposal, first coupler uses 1 × 2 coupler, and second coupler is adopted
With 3 × 3 couplers.
As the improvement of above-mentioned technical proposal, the elastic is made of silicon rubber.
As the improvement of above-mentioned technical proposal, the input optical fibre and output optical fibre use single-mode fiber.
As the improvement of above-mentioned technical proposal, the winding optical fiber uses G657 single-mode fibers.
The beneficial effects of the utility model have：
The utility model provides a kind of optical fiber detector for structure of being shaken with laterally limit, and the utility model is dry using optical fiber
Principle is related to vibration signals collecting, with small volume, sensitivity is high, precision is high, dynamic range is big, electromagnetism interference, laterally limit
The advantage shaken, available for earthquake monitoring, artificial earthquake is detected, the field such as acoustic detection.Compared with existing wave detector, this reality
There is following advantage with new：
First, accuracy of detection is high, monitoring sensitivity is high, electromagnetism interference；
2nd, with lateral-limiting-shake spring, ability of shaking is limited with higher transverse direction；
3rd, multiple probes can constitute three-component vibration wave measurement in high precision using in parallel；
4th, make wave detector by oneself, have the advantages that small volume, cost be low, anticorrosive, uniformity is good.
Brief description of the drawings
Below in conjunction with the accompanying drawings and specific embodiment the utility model is described in further detail, wherein：
Fig. 1 is the structural representation of the utility model embodiment；
Fig. 2 is the structural representation of lateral-limiting-shake spring in the utility model embodiment.
Embodiment
Referring to Fig. 1 and Fig. 2, a kind of optical fiber detector for structure of being shaken with laterally limit of the present utility model, including mounting seat
1st, installation cavity is provided with input optical fibre 2, output optical fibre 3 and pickup arm 4, the mounting seat 1, the pickup arm 4, which is adjacent to, to be arranged on
In installation cavity, the pickup arm 4 is provided with mass 41, and the mass 41 is cylindrical, and the mass 41 includes the first matter
The mass 412 of gauge block 411 and second, first mass 411 is arranged on the second mass 412 by a contiguous block 413.
The upper and lower ends of the mass 41 are provided with elastic 42, and elastic 42 is made of silicon rubber, increase elasticity so that inspection
Ripple device measurement when can improve vibration environment in measurement accuracy.The two ends of elastic 42 respectively with mounting seat 1 and mass 41
Close connection；The middle part of mass 41 is set with lateral-limiting-shake spring 43, and the lateral-limiting-shake spring 43 is sleeved on contiguous block 413
On, and be fixed by screws in mounting seat 1, lateral-limiting-shake spring plays spring damping effect, and the lateral-limiting-shake spring 43 is copper
Piece or carbon fiber sheet, thickness are 0.01-0.2mm, and the lateral-limiting-shake spring 43 using so small thickness can increase sensitivity, make
The accuracy of detection increase of wave detector.Thus whole device constitutes the inductor of a spring mass-damping structure.
Wherein, coupler 5 is installed, the coupler 5 includes the first coupler 51 and the second coupling in the mounting seat 1
Device 52, the input optical fibre 2 connects the first coupler 51, and exports a pair of winding optical fiber 6, and a pair of winding optical fiber 6 are wound respectively
The second coupler 52 is all connected with after elastic 42, the output end of the second coupler 52 connects output optical fibre 3.Due to the input
Optical fiber 2 and output optical fibre 3 use single-mode fiber, so winding optical fiber 6 also uses single-mode fiber, and use G657 models, this
Sample can make wave detector be sized to miniaturization.Further, first coupler 51 uses specification for 1 × 2 coupler or 2
× 2 couplers, second coupler 52 uses 3 × 3 couplers, and the second coupler 52 is to utilize using 3 × 3 couplers
The characteristic of the phase difference of its 2 π/3 is easier to obtain quadrature wave so that testing result is more accurate.
Two beams are divided into by 1 × 2 coupler using beam of coherent light in the present embodiment, are connected by 1 × 2 coupler
Two wind optical fiber 6 up and down, and two winding optical fiber 6 are respectively wound around on two groups of elastics 42 and coupled with elastic 42 as biography
Feel arm 4, the two ends of elastic 42 are closely connected with mounting seat 1 and mass 41 respectively, after mounting seat 1 is fastened with measured object, quilt
Thing vibration is surveyed, causes mass 41 to be vibrated under effect of inertia, while lateral-limiting-shake spring 43 limits mass 41 and pickup arm 4
Transverse response, two groups of pickup arms 4 are drawn, press the change for causing light path in optical fiber respectively, by two-way light in 3 × 3 couplers
Interference light is synthesized, interference light carries vibration information output, obtain the interference signal and this two-way that there is two-way phase difference to be 2 π/3
Vibration information is carried in interference signal,
The interference signal of wherein 3 × 3 couplers output is distinguished by signal form when two groups of winding optical fiber 6 are exported up and down
For：I31=I2+I2Sin (Δ α -2 π/3), I32=I2+I2Sin (π/3 of Δ α+2), wherein Δ α=k (l61-l62) it is upper and lower two groups
Wind optical path difference change, I caused by the fiber lengths of optical fiber 62For the signal of input optical fibre 2, I31And I32It is output optical fibre 3
Output signal, l61And l62The length of optical fiber 6 is respectively wound up and down.The change of interfere arm causes two length changes, caused
It is the change of phase of light wave in light wave fields, therefore, the high accuracy for having given full play to interferometry vibration using the utility model is surveyed
Amount, high-sensitivity measurement advantage, it is achieved thereby that detection.
It is described above, simply better embodiment of the present utility model, but the utility model is not limited to above-mentioned reality
Example is applied, as long as it reaches technique effect of the present utility model with any same or similar means, should all belong to of the present utility model
Protection domain.
Claims (8)
1. a kind of optical fiber detector for structure of being shaken with laterally limit, it is characterised in that：Including mounting seat（1）, input optical fibre（2）、
Output optical fibre（3）And pickup arm（4）, the mounting seat（1）It is interior to be provided with installation cavity, the pickup arm（4）It is adjacent to installed in installation
Intracavitary, the pickup arm（4）Provided with mass（41）, the mass（41）Upper and lower ends be provided with elastic（42）,
The mass（41）Middle part is set with lateral-limiting-shake spring（43）, the mounting seat（1）Coupler is inside installed（5）, the coupling
Clutch（5）Including the first coupler（51）With the second coupler（52）, the input optical fibre（2）Connect the first coupler（51）,
And export a pair of winding optical fiber（6）, the pair of winding optical fiber（6）It is respectively wound around elastic（42）Couple above and with second
Device（52）Connection, second coupler（52）Output end connects output optical fibre（3）.
2. a kind of optical fiber detector of structure of being shaken with laterally limit according to claim 1, it is characterised in that：The quality
Block（41）It is cylindrical, the mass（41）Including the first mass（411）With the second mass（412）, first matter
Gauge block（411）Pass through a contiguous block（413）Installed in the second mass（412）On.
3. a kind of optical fiber detector of structure of being shaken with laterally limit according to claim 2, it is characterised in that：The transverse direction
Limit the piece that shakes（43）It is sleeved on contiguous block（413）On, and it is fixed by screws in mounting seat（1）On.
4. a kind of optical fiber detector of structure of being shaken with laterally limit according to claim 3, it is characterised in that：The transverse direction
Limit the piece that shakes（43）For copper sheet, thickness is 0.01 ~ 0.2mm.
5. a kind of optical fiber detector of structure of being shaken with laterally limit according to claim 1, it is characterised in that：Described first
Coupler（51）Using 1 × 2 coupler, second coupler（52）Using 3 × 3 couplers.
6. a kind of optical fiber detector of structure of being shaken with laterally limit according to claim 1, it is characterised in that：The bullet
Property post（42）It is made of silicon rubber.
7. a kind of optical fiber detector of structure of being shaken with laterally limit according to claim 1, it is characterised in that：The input
Optical fiber（2）And output optical fibre（3）Use single-mode fiber.
8. a kind of optical fiber detector of structure of being shaken with laterally limit according to claim 7, it is characterised in that：The winding
Optical fiber（6）Using G657 single-mode fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720150036.7U CN206523645U (en) | 2017-02-17 | 2017-02-17 | A kind of optical fiber detector for structure of being shaken with laterally limit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720150036.7U CN206523645U (en) | 2017-02-17 | 2017-02-17 | A kind of optical fiber detector for structure of being shaken with laterally limit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261895A (en) * | 2019-07-09 | 2019-09-20 | 安徽大学 | A kind of all -fiber Microseismic monitoring system that highly sensitive wideband is rung |
| CN110261893A (en) * | 2019-07-09 | 2019-09-20 | 安徽大学 | A kind of adjustable all -fiber acceleration microseismic monitoring sensor probe of damping |
| CN110261892A (en) * | 2019-07-01 | 2019-09-20 | 武汉理工大学 | Simple component, three-component optical fiber optical grating vibration transducer and sensor array based on dim light grid |
| WO2020243993A1 (en) * | 2019-06-06 | 2020-12-10 | 山东科技大学 | Photoelectric composite geophone and detection system |
-
2017
- 2017-02-17 CN CN201720150036.7U patent/CN206523645U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020243993A1 (en) * | 2019-06-06 | 2020-12-10 | 山东科技大学 | Photoelectric composite geophone and detection system |
| CN110261892A (en) * | 2019-07-01 | 2019-09-20 | 武汉理工大学 | Simple component, three-component optical fiber optical grating vibration transducer and sensor array based on dim light grid |
| CN110261895A (en) * | 2019-07-09 | 2019-09-20 | 安徽大学 | A kind of all -fiber Microseismic monitoring system that highly sensitive wideband is rung |
| CN110261893A (en) * | 2019-07-09 | 2019-09-20 | 安徽大学 | A kind of adjustable all -fiber acceleration microseismic monitoring sensor probe of damping |
| WO2021004423A1 (en) * | 2019-07-09 | 2021-01-14 | 安徽大学 | High-sensitivity wide-frequency-response all fiber micro-seismic monitoring system |
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