CN208060054U - It is segmented micro-bend formula fibre optic compression sensor - Google Patents
It is segmented micro-bend formula fibre optic compression sensor Download PDFInfo
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- CN208060054U CN208060054U CN201820417285.2U CN201820417285U CN208060054U CN 208060054 U CN208060054 U CN 208060054U CN 201820417285 U CN201820417285 U CN 201820417285U CN 208060054 U CN208060054 U CN 208060054U
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Abstract
The whole section of optical fiber that micro-bend formula fibre optic compression sensor is coiled into β shapes using one is segmented to be sensed,β shape optical fiber is divided into the first breeze way,Second breeze way,Third breeze way,First micro-bend section,Second micro-bend section and micro-bend section of third,Sensor is according to fiber microbending loss principle,Microbending loss produces intensity modulation to the optical signal in optical fiber,When ambient pressure is smaller,Micro-bend radius of curvature is larger,Microbending loss is smaller,Light intensity in optical fiber is larger,When ambient pressure is larger,Micro-bend section of radius of curvature is smaller,Microbending loss is larger,Light intensity in optical fiber is smaller,There is no expose fiber end face in air in the optical fiber of this sensor senses,Rather than the optical fiber seam of sensing has been sealed in photo-coupler or has gone out in photo-coupler,The optical fiber of this sensor senses part is not easy by environment temperature,Humidity,Cleannes are interfered,The not moisture in by air,Dust influence and it is mouldy,So sensor can work long-term and stably.
Description
Technical field
The present invention relates to a kind of pressure sensor more particularly to a kind of fibre optic compression sensors, belong to optical fiber sensing technology
Field.
Background technology
Fibre optic compression sensor is not interfered due to its long transmission distance by electromagnetic environment, has been widely used, and shape is modulated
Formula mainly has intensity modulation type, grating type optical fiber and interference-type, has more patent skill in terms of fibre optic compression sensor at present
Art, these fibre optical sensors respectively have its advantage, and some sensitivity is very high, and some frequency responses are fine, and some technology contents are very high,
They can adapt to the conversion of pressure signal very well, but the structure of these sensors is complex, and cost of manufacture is higher, and some makes
Use the limited time.
Utility model content
That the purpose of the present invention is to provide a kind of structures is relatively simple, cost of manufacture is relatively low, and can be in complicated environmental condition
The fibre optic compression sensor used steadily in the long term down.
The technical problem to be solved by the present invention is to what is be achieved through the following technical solutions：Micro-bend formula optical fiber pressure is segmented to pass
Sensor includes sleeve (1), the second breeze way (2), arc-shaped side (3), the first lateral frame (4), shell step (5), the first buffering shield
Cover (6), first micro-bend section (7), soft rubber shell (8), disk step (9), second micro-bend section (10), the second buffering sheath
(11), pressure-sensitive disk (12), bar holder (13), shaft (14), center bearing bracket (15), third micro-bend section (16), third buffer sheath
(17), the second lateral frame (18), third breeze way (19), shell tail portion (20), enter photo-coupler (21), go out photo-coupler
(22), optic fibre switching head (23), optical fiber jacket (24), incident optical (25), the output optical fiber (26), optical fiber seam (27), vertical
Holder (28), the first breeze way (29), spring pressure plate (30), spring (31), spring base (32), pedestal via (33), angle rib
(34) and shell (35)；
Shell (35), shell tail portion (20), sleeve (1), the first lateral frame (4), the second lateral frame (18), vertical support frame
(28) and spring base (32) constitutes fixing bracket, and pressure-sensitive disk (12), bar holder (13), shaft (14) and center bearing bracket (15) are constituted
Movable support, first micro-bend section (7), second micro-bend section (10) and micro-bend section of third (16) constitute sensing mechanism, the first buffering shield
It covers (6), the second buffering sheath (11) and third buffering sheath (17) and constitutes buffer gear；
Shell (35) side is equipped with shell tail portion (20), and the inside on shell (35) top sides edge is equipped with shell step (5), outside
The waist location of shell (35) both sides is equipped with the first lateral frame (4) and the second lateral frame (18), and the first lateral frame (4) is above equipped with the
One buffering sheath (6), the second lateral frame (18) are equipped with third buffering sheath (17) above, and the centre bit of shell (35) bottom installs
There are spring base (32), spring base (32) waist to be equipped with pedestal via (33), sleeve (1), sleeve (1) are equipped with above spring base (32)
Outside is equipped with vertical support frame equipped with spring (31), shell (35) bottom and in the intersection of shell (35) Yu shell tail portion (20)
(28), the first lateral frame (4) one end is connect with shell (35), and the second lateral frame (18) one end is connect with shell (35), sleeve (1)
Bottom end and spring (31) bottom end are connect with the upper surface of spring base (32), and lower face and the shell (35) of spring base (32) connect
It connects；
The top of shell (35) upper edge hole is equipped with soft rubber shell (8), and the top of soft rubber shell (8) is equipped with pressure-sensitive disk
(12), pressure-sensitive disk (12) is disc, and the lower section at pressure-sensitive disk (12) edge is equipped with disk step (9), soft rubber shell (8) it is upper
Edge is connect with disk step (9), and the lower edge of soft rubber shell (8) is connect with shell step (5), is set below pressure-sensitive disk (12)
There are bar holder (13) and shaft (14), the top of shaft (14) to be connect with pressure-sensitive disk (12) by bar holder (13), shaft (14)
Middle part is equipped with center bearing bracket (15) and spring pressure plate (30), and spring pressure plate (30) is located at below center bearing bracket (15), center bearing bracket
(15) it is equipped with the second buffering sheath (11) above, the shaft (14) below spring pressure plate (30) is equipped with three angle ribs (34) above,
The cross section of angle rib (34) is isosceles triangle, and the shaft (14) and its angle rib (34) below spring pressure plate (30) are partly inserted in
In sleeve (1)；
The side of shell tail portion (20) is equipped with into photo-coupler (21) and goes out photo-coupler (22), and shell (35) intracavitary is equipped with
Piece optical fiber its be each passed through pedestal via (33), the first buffering sheath (6), the second buffering sheath (11) and third and buffer sheath
(17) β shapes are constituted after, the β shapes optical fiber is divided into the first breeze way (29), the second breeze way (2), first micro-bend section (7), the
Two micro-bend sections (10), third micro-bend section (16) and third breeze way (19), one end of β shape optical fiber by enter photo-coupler (21) and
Optic fibre switching head (23) is connect with incident optical (25), and the other end of β shape optical fiber is by going out photo-coupler (22) and optic fibre switching
Head (23) is connect with the output optical fiber (26), and incident optical (25), the first breeze way (29), the are followed successively by main optical path direction of advance
Two breeze ways (2), first micro-bend section (7), second micro-bend section (10), third micro-bend section (16), third breeze way (19), emergent light
Fine (26)；
The sensor produces light intensity tune according to fiber microbending loss principle, microbending loss to the optical signal in optical fiber
System, and microbending loss be first micro-bend section (7), second micro-bend section (10) and micro-bend section of (16) three of third microbending loss it
With；
When ambient pressure is smaller, pressure-sensitive disk (12) passes through bar holder (13), shaft (14), center bearing bracket (15) and second
The pressure that buffering sheath (11) is applied to β shape optical fiber is smaller, first micro-bend section (7), second micro-bend section (10) and micro-bend section of third
(16) radius of curvature is larger, and microbending loss is smaller, and the light intensity in optical fiber is larger；
When ambient pressure is larger, pressure-sensitive disk (12) passes through bar holder (13), shaft (14), center bearing bracket (15) and second
The pressure that buffering sheath (11) is applied to β shape optical fiber is larger, first micro-bend section (7), second micro-bend section (10) and micro-bend section of third
(16) radius of curvature is smaller, and microbending loss is larger, and the light intensity in optical fiber is smaller.
Due to the adoption of the above technical scheme, advantage for present invention and good effect are：This fibre optic compression sensor
Structure is relatively simple, cost of manufacture is relatively low, and sensor is not easy by environment temperature, humidity, cleannes and electromagnetic interference influence, will not
The performance of sensor is influenced because moisture, dust, mouldy etc. corrode, sensor being capable of long-time normal use.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples, and the present invention has following 4 width attached drawing：
Fig. 1 is the structural schematic diagram of this sensor,
Fig. 2 is the shape graph of this sensor β shape optical fiber,
Fig. 3 is the vertical view of this sensor,
Fig. 4 be this sensor sleeve, shaft and angle rib part sectional view.
Each number marked in the accompanying drawings indicates as follows respectively：
1. sleeve, 2. second breeze ways, 3. arc-shaped sides, 4. first lateral frames, 5. shell steps, 6. first buffering sheaths,
7. first micro-bend section, 8. soft rubber shells, 9. disk steps, 10. second micro-bend sections, 11. second buffering sheaths, 12. pressure-sensitive disks,
13. bar holder, 14. shafts, 15. center bearing brackets, micro-bend section of 16. thirds, 17. thirds buffering sheath, 18. second lateral frames, 19.
Third breeze way, 20. shell tail portions, 21. enter photo-coupler, and 22. go out photo-coupler, 23. optic fibre switching heads, 24. optical fiber jackets,
25. incident optical, 26. the output optical fibers, 27. optical fiber seams, 28. vertical support frames, 29. first breeze ways, 30. spring pressure plates, 31.
Spring, 32. spring bases, 33. pedestal vias, 34. jiaos of ribs, 35. shells, 36. external force directions.
Specific implementation mode
1. according to Fig. 1 to Fig. 4, it is segmented micro-bend formula fibre optic compression sensor, including sleeve (1), the second breeze way (2), arc
Shape side (3), the first lateral frame (4), shell step (5), the first buffering sheath (6), first micro-bend section (7), soft rubber shell
(8), disk step (9), second micro-bend section (10), the second buffering sheath (11), pressure-sensitive disk (12), bar holder (13), shaft
(14), center bearing bracket (15), third micro-bend section (16), third buffering sheath (17), the second lateral frame (18), third breeze way
(19), shell tail portion (20), enter photo-coupler (21), go out photo-coupler (22), optic fibre switching head (23), optical fiber jacket (24),
Incident optical (25), the output optical fiber (26), optical fiber seam (27), vertical support frame (28), the first breeze way (29), spring pressure plate
(30), spring (31), spring base (32), pedestal via (33), angle rib (34) and shell (35)
2. shell (35), shell tail portion (20), sleeve (1), the first lateral frame (4), the second lateral frame (18), vertical support frame
(28) and spring base (32) constitutes fixing bracket, and pressure-sensitive disk (12), bar holder (13), shaft (14) and center bearing bracket (15) are constituted
Movable support, first micro-bend section (7), second micro-bend section (10) and micro-bend section of third (16) constitute sensing mechanism, the first buffering shield
It covers (6), the second buffering sheath (11) and third buffering sheath (17) and constitutes buffer gear；
3. shell (35) side is equipped with shell tail portion (20), the inside on shell (35) top sides edge is equipped with shell step (5),
The waist location of shell (35) both sides is equipped with the first lateral frame (4) and the second lateral frame (18), and the first lateral frame (4) is equipped with above
First buffering sheath (6), the second lateral frame (18) are equipped with third buffering sheath (17), the center of shell (35) bottom above
Equipped with spring base (32), spring base (32) waist is equipped with pedestal via (33), and sleeve (1), sleeve are equipped with above spring base (32)
(1) external to be equipped with vertical branch with the intersection of shell tail portion (20) equipped with spring (31), shell (35) bottom and in shell (35)
Frame (28), the first lateral frame (4) one end are connect with shell (35), and the second lateral frame (18) one end is connect with shell (35), sleeve
(1) bottom end and spring (31) bottom end are connect with the upper surface of spring base (32), lower face and the shell (35) of spring base (32)
Connection；
4. the top of shell (35) upper edge hole is equipped with soft rubber shell (8), the top of soft rubber shell (8) is equipped with pressure-sensitive disk
(12), pressure-sensitive disk (12) is disc, and the lower section at pressure-sensitive disk (12) edge is equipped with disk step (9), soft rubber shell (8) it is upper
Edge is connect with disk step (9), and the lower edge of soft rubber shell (8) is connect with shell step (5), is set below pressure-sensitive disk (12)
There are bar holder (13) and shaft (14), the top of shaft (14) to be connect with pressure-sensitive disk (12) by bar holder (13), shaft (14)
Middle part is equipped with center bearing bracket (15) and spring pressure plate (30), and spring pressure plate (30) is located at below center bearing bracket (15), center bearing bracket
(15) it is equipped with the second buffering sheath (11) above, the shaft (14) below spring pressure plate (30) is equipped with three angle ribs (34) above,
The cross section of angle rib (34) is isosceles triangle, and the shaft (14) and its angle rib (34) below spring pressure plate (30) are partly inserted in
In sleeve (1)；
5. the side of shell tail portion (20) is equipped with into photo-coupler (21) and goes out photo-coupler (22), shell (35) intracavitary is set
Having an optical fiber, it is each passed through pedestal via (33), the first buffering sheath (6), the second buffering sheath (11) and third buffering shield
Cover (17) after constitute β shapes, the β shapes optical fiber be divided into the first breeze way (29), the second breeze way (2), first micro-bend section (7),
Second micro-bend section (10), third micro-bend section (16) and third breeze way (19), one end of β shape optical fiber is by entering photo-coupler (21)
It is connect with incident optical (25) with optic fibre switching head (23), the other end of β shape optical fiber is turned by going out photo-coupler (22) and optical fiber
Connector (23) is connect with the output optical fiber (26), be followed successively by main optical path direction of advance incident optical (25), the first breeze way (29),
Second breeze way (2), first micro-bend section (7), second micro-bend section (10), third micro-bend section (16), third breeze way (19), outgoing
Optical fiber (26)；
6. the sensor produces light intensity tune according to fiber microbending loss principle, microbending loss to the optical signal in optical fiber
System, and microbending loss be first micro-bend section (7), second micro-bend section (10) and micro-bend section of (16) three of third microbending loss it
With；
When ambient pressure is smaller, pressure-sensitive disk (12) passes through bar holder (13), shaft (14), center bearing bracket (15) and second
The pressure that buffering sheath (11) is applied to β shape optical fiber is smaller, first micro-bend section (7), second micro-bend section (10) and micro-bend section of third
(16) radius of curvature is larger, and microbending loss is smaller, and the light intensity in optical fiber is larger；
When ambient pressure is larger, pressure-sensitive disk (12) passes through bar holder (13), shaft (14), center bearing bracket (15) and second
The pressure that buffering sheath (11) is applied to β shape optical fiber is larger, first micro-bend section (7), second micro-bend section (10) and micro-bend section of third
(16) radius of curvature is smaller, and microbending loss is larger, and the light intensity in optical fiber is smaller.
7. the first buffering sheath (6), the second buffering sheath (11) and third buffering sheath (17) on the one hand play optical fiber
Cushioning effect prevents holder from generating abrasion to optical fiber, on the other hand plays first micro-bend section of (7), second by their elasticity
Involve effect between micro-bend section (10) and micro-bend section of third (16), and under ambient pressure effect, first micro-bend section (7), the
The radius of curvature of two micro-bend sections (10) and third micro-bend section (16) can become smaller simultaneously, and after ambient pressure cancels, first is micro-bend
The radius of curvature of section (7), second micro-bend section (10) and third micro-bend section (16) can be restored to become larger simultaneously,
8. the material of shell (35), pressure-sensitive disk (12) and bar holder (13) is aluminium alloy, sleeve (1) and shaft (14) and
The material of angle rib (34) is brass, and optical fiber is 50 μm/125 μm multimode fibres, the first buffering sheath (6), the second buffering sheath
(11) and the material of third buffering sheath (17) is abrasive rubber, and optic fibre switching head (23) is FC types.
9. the optical fiber of sensor internal be a whole section of optical fiber for being coiled into β shapes, in addition in sensor infrared optical fiber it
Between there are the optical fiber seams (27) of non-sensing outside, there is no the aerial optical fiber of exposure in whole section of optical fiber of β shapes of sensing
The optical fiber seam (27) of end face rather than sensing has been sealed in photo-coupler (21) or has gone out in photo-coupler (22), so, this
The transducing part optical fiber of sensor is not easy by environment temperature, humidity, cleannes interference, and moisture, the dust in by air are not influenced
And it is mouldy.
10. a sensor needs separately to configure laser, laser regulated power supply, condenser lens, light-sensitive device, direct current are flat
Weigh circuit and ammeter, incident optical (25) is sent into after the light source line focus lens focus that laser is sent out, through this sensor senses
Afterwards, modulated signal is exported by the output optical fiber (26), opto-electronic conversion and process DC balance circuit through light-sensitive device
After the direct current for removing static part, the size of electric signal is indicated by ammeter, and indication electric meter can be pointer ammeter,
It can be digital electric meter.
Claims (1)
1. a kind of micro-bend formula fibre optic compression sensor of segmentation, including sleeve (1), the second breeze way (2), arc-shaped side (3), the first cross
Holder (4), shell step (5), first buffering sheath (6), first micro-bend section (7), soft rubber shell (8), disk step (9),
Second micro-bend section (10), second buffering sheath (11), pressure-sensitive disk (12), bar holder (13), shaft (14), center bearing bracket (15),
Third micro-bend section (16), the second lateral frame (18), third breeze way (19), shell tail portion (20), enters third buffering sheath (17)
Photo-coupler (21) goes out photo-coupler (22), optic fibre switching head (23), optical fiber jacket (24), incident optical (25), the output optical fiber
(26), optical fiber seam (27), vertical support frame (28), the first breeze way (29), spring pressure plate (30), spring (31), spring base
(32), pedestal via (33), angle rib (34) and shell (35)；
Shell (35), shell tail portion (20), sleeve (1), the first lateral frame (4), the second lateral frame (18), vertical support frame (28) and
Spring base (32) constitutes fixing bracket, pressure-sensitive disk (12), bar holder (13), shaft (14) and center bearing bracket (15) composition activity branch
Frame, first micro-bend section (7), second micro-bend section (10) and micro-bend section of third (16) composition sensing mechanism, the first buffering sheath (6),
Second buffering sheath (11) and third buffering sheath (17) constitute buffer gear；
It is characterized in that：Shell (35) side is equipped with shell tail portion (20), and the inside on shell (35) top sides edge is equipped with shell platform
Rank (5), the waist location of shell (35) both sides are equipped with the first lateral frame (4) and the second lateral frame (18), on the first lateral frame (4)
Face is equipped with the first buffering sheath (6), and the second lateral frame (18) is equipped with third buffering sheath (17) above, in shell (35) bottom
Heart position is equipped with spring base (32), and spring base (32) waist is equipped with pedestal via (33), sleeve is equipped with above spring base (32)
(1), it is equipped with spring (31) outside sleeve (1), shell (35) bottom and is set in shell (35) and the intersection of shell tail portion (20)
There are vertical support frame (28), the first lateral frame (4) one end to be connect with shell (35), the second lateral frame (18) one end connects with shell (35)
Connect, sleeve (1) bottom end and spring (31) bottom end are connect with the upper surface of spring base (32), the lower face of spring base (32) with it is outer
Shell (35) connects；
The top of shell (35) upper edge hole is equipped with soft rubber shell (8), and the top of soft rubber shell (8) is equipped with pressure-sensitive disk (12),
Pressure-sensitive disk (12) is disc, and the lower section at pressure-sensitive disk (12) edge is equipped with disk step (9), the upper edge of soft rubber shell (8)
It is connect with disk step (9), the lower edge of soft rubber shell (8) is connect with shell step (5), and axis is equipped with below pressure-sensitive disk (12)
The top of pole socket (13) and shaft (14), shaft (14) is connect by bar holder (13) with pressure-sensitive disk (12), in the middle part of shaft (14)
Equipped with center bearing bracket (15) and spring pressure plate (30), spring pressure plate (30) is located at below center bearing bracket (15), center bearing bracket (15)
It is equipped with the second buffering sheath (11) above, the shaft (14) below spring pressure plate (30) is equipped with three angle ribs (34), angle rib above
(34) cross section is isosceles triangle, and the shaft (14) and its angle rib (34) below spring pressure plate (30) are partly inserted in sleeve
(1) in；
The side of shell tail portion (20) is equipped with into photo-coupler (21) and goes out photo-coupler (22), and shell (35) intracavitary is equipped with one
Optical fiber its be each passed through pedestal via (33), first buffering sheath (6), second buffering sheath (11) and third buffer sheath (17)
Constitute β shapes later, the β shapes optical fiber is divided into the first breeze way (29), the second breeze way (2), first micro-bend section (7), second micro-
Curved segment (10), third micro-bend section (16) and third breeze way (19), one end of β shape optical fiber is by entering photo-coupler (21) and optical fiber
Adapter (23) is connect with incident optical (25), and the other end of β shape optical fiber is by going out photo-coupler (22) and optic fibre switching head
(23) it is connect with the output optical fiber (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820417285.2U CN208060054U (en) | 2018-03-27 | 2018-03-27 | It is segmented micro-bend formula fibre optic compression sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820417285.2U CN208060054U (en) | 2018-03-27 | 2018-03-27 | It is segmented micro-bend formula fibre optic compression sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208060054U true CN208060054U (en) | 2018-11-06 |
Family
ID=63989230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820417285.2U Expired - Fee Related CN208060054U (en) | 2018-03-27 | 2018-03-27 | It is segmented micro-bend formula fibre optic compression sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208060054U (en) |
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2018
- 2018-03-27 CN CN201820417285.2U patent/CN208060054U/en not_active Expired - Fee Related
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