CN102269770A - Stick for gauging flow velocity of optical fibers - Google Patents
Stick for gauging flow velocity of optical fibers Download PDFInfo
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- CN102269770A CN102269770A CN201110123943XA CN201110123943A CN102269770A CN 102269770 A CN102269770 A CN 102269770A CN 201110123943X A CN201110123943X A CN 201110123943XA CN 201110123943 A CN201110123943 A CN 201110123943A CN 102269770 A CN102269770 A CN 102269770A
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- blade
- flow velocity
- optical fiber
- meter
- fiber grating
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Abstract
The invention relates to a stick for gauging a flow velocity of optical fibers. The stick provided by the invention comprises a ruler body with a scale, wherein a handle is arranged on the upper end of the ruler body; a circular bubble is arranged on the upper end of the handle and the ruler body is also provided with an optical fiber grating measuring device which can move up and down along the ruler body. The stick for gauging the flow velocity of optical fibers is placed behind a drainage pipeline or an open channel; an orientating device can be used for automatically adjusting a velocity-measuring direction of an element; an optical fiber measuring element is used for monitoring a water flow velocity and the ruler body with the scale is used for displaying the water level of the gauging point and the depth of a drainage ditch. The water flow velocities of different water levels have certain differences so that a multiple-gauging-point measurement is carried out by sliding a main body of a measuring part. The flow rates of the drainage pipeline or the open channel is calculated by the water level of the gauging point, a flow area and the water flow velocity of each gauging point so that a crack water inflow is obtained.
Description
Technical field
The present invention relates to a kind of instrument that is used for measuring drainage pipeline or the different water level flow velocitys of open channel, specifically a kind of optical fiber flow velocity feeler.
Background technology
China's underground engineering construction causes such as tunnel, subway, power station, iron ore, colliery of growing up at present are flourish, but prominent water burst accident takes place often, has caused a large amount of casualties and economic loss.This wherein has partly cause is that the monitoring of mine or tunnel drainage amount is not in place, lacks effective flow monitoring instrument, can't accurately measure the crack water yield.
Monitoring trench drain flow rate of liquid, monitoring point water level and draining ditch depth can finally accurately draw the flow of water burst, can effectively address the above problem, but existing flow monitoring instrument volume ratio is bigger, thereby change the out of true that measurement parameter is caused in the flow field easily, and also can't measure at the minute fissure place.In addition, existing flow monitoring instrument also exists resistance to compression and waterproof ability is poor, can't realize shortcomings such as multi-measuring point measurement, leveling capability difference, still has very large room for promotion.
The theory of the fiber optical explanation:
As shown in figure 10, fiber grating is to utilize certain mode to cause the permanent change of fiber core refractive index, thus the space phase grating that the refractive index that produces distributes to space periodicity along fiber axis.Fiber grating is exactly one section optical fiber, has the structure of refractive index cycle variation in its fibre core.
Fibre Optical Sensor is compared with traditional sensors and is had the following advantages:
(l) highly sensitive;
(2) passive device does not exert an influence to measurand;
(3) optical fiber is dielectric, and is high pressure resistant, corrosion-resistant, safe and reliable under inflammable, explosive environments;
(4) bandwidth, dynamic range is big;
(5) geometric configuration has many-sided adaptability, can make the sensor and the sensor array of arbitrary shape;
(6) on common technical foundation, can make the sensor of sensing different physical quantities;
(7) can match with the fiber optic remote technology, realize telemeasurement and control;
(8) fiber optic sensor system of being made up of Fibre Optical Sensor is convenient to be connected with central computer, realizes multi-functional, intelligentized requirement;
(9) sensor bulk is little, in light weight.
Summary of the invention
The objective of the invention is for overcoming above-mentioned the deficiencies in the prior art, a kind of optical fiber flow velocity feeler is provided.
For achieving the above object, the present invention adopts following technical proposals:
A kind of optical fiber flow velocity feeler, it comprises the blade of being with scale, and the upper end of blade is provided with handle, and the upper end of handle is provided with circular bubble, also is provided with the fiber grating measurement mechanism that can move up and down along blade on the blade.
Described fiber grating measurement mechanism comprises stationary installation, fiber grating meter and orienting device, and described stationary installation is connected with described blade, and described fiber grating meter is connected with stationary installation, and described orienting device is connected with the fiber grating meter.
Described stationary installation comprises a connecting link and the collar, and an end of the described collar connects described connecting link, the other end carries out fastening being nested on the blade by nut.
Described fiber grating meter comprises the meter housing, and the meter housing is provided with rotatable housing, and described rotatable housing is connected with described stationary installation.
Described rotatable housing is rotatably connected by some ball rollers and described meter housing.
Described orienting device comprises the body of rod that is connected with described housing, and the end of the body of rod also is connected with at least one plates.
Described plates are two, and the end of the two all is connected with the described body of rod, and the two has angle.
The bottom of described blade also is provided with pallet.
Described blade is made up of by being threaded a plurality of minutes blades, links to each other by screw thread between described handle and the blade.
The light signal call wire that described fiber grating meter is drawn is arranged in blade is parallel by the light signal call wire pickup groove that is arranged on the blade.
After optical fiber flow velocity feeler placed drainage pipeline or open channel, orienting device is the regulating element direction that tests the speed automatically, optical fiber measurement element monitoring water velocity, and the scale blade shows measuring point water level and draining ditch depth.Different water level water velocities have certain difference, and the measurement section main body of therefore sliding is carried out multi-measuring point and measured.Calculate drainage pipeline or open channel flow rate by measuring point water level, discharge area and each measuring point water velocity, thereby draw the crack water yield.
Optical fiber flow velocity feeler of the present invention is compared with other flow monitoring instruments, has following significant technical advantage and characteristics:
(1) measuring accuracy height adopts theory of the fiber optical can reach very high sensitivity, effectively raises the precision of measurement data;
(2) simple structure, easy to process, the cost performance height;
(3) adopt the single lever-type design, can realize the multi-measuring point measurement;
(4) dismantled and assembled, equipment is easy to carry;
(5) waterproof, compressive property are good;
(6) be equipped with the detecting element orienting device, improved measuring accuracy;
(7) can also measure monitoring point water level and draining ditch depth simultaneously velocity measurement the time.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the side view of blade part;
Fig. 3 is the overall vertical view of feeler;
Fig. 4 be stationary installation side view;
Fig. 5 is the vertical view of stationary installation;
Fig. 6 is the side view of orienting device;
Fig. 7 is the vertical view of orienting device;
Fig. 8 is the sectional view of fiber grating meter part;
Fig. 9 is the synoptic diagram of this feeler use principle;
Figure 10 is theory of the fiber optical figure.
Wherein 1. circular bubbles, 2. handle, 3. blade; 4. light signal call wire pickup groove, 5. plug, 6. stationary installation; 7. fiber grating meter, 8. measuring head, 9. protective cover; 10. orienting device, 11. light signal call wires, 12. pallets; 13. the cone rubber film, 14. meter housings, 15. semi-girders; 16. measurement grating; 17. the ball roller, 18. end caps, 19. fixing metal sheets; 20. target sheet; 21. the photosignal conversion equipment, 22. data analysis computers, 23. optical signal transmission; the transmission of 24 electric signal, 25. other feelers.
Embodiment
The present invention will be further elaborated below by instantiation, should be noted that following explanation only is in order to explain the present invention, its content not to be limited.
As shown in Figure 1; a kind of optical fiber flow velocity feeler that is used to measure flow rate of liquid, flow is made up of circular bubble 1, handle 2, band scale blade 3, light signal call wire 11 pickup grooves 4, plug 5, pincerlike stationary installation 6, fiber grating meter 7, measuring head 8, protective cover 9, orienting device 10, light signal call wire 11 and bottom rubber pallet 12.
As shown in Figure 2, described blade 3 is made up of by being threaded 2 sections branch blades and handle 2, also link to each other between described handle 2 and the blade 3 by screw thread, between every section branch blade and divide blade identical with screw thread between the handle 2, and the scale between each minute blade matches successively, therefore handle 2 can be pulled down respectively and is connected, so that the usefulness of measurement different depth water level with each section branch blade.According to the expression among Fig. 2, handle 2 is connected above the middle branch blade of figure, and the branch blade is connected above the branch blade on the right, and what represent in the circle among Fig. 2 is the retaining thread structure.Blade 3 is designed to three parts, when ditch depth can make handle 2 and the multiple measurement of hypomere bar during less than 0.8 meter, ditch depth during greater than 0.8 meter three parts use together.Also be provided with light signal call wire pickup groove 4 on the blade 3, be convenient to light signal call wire 11 is stuck in this pickup groove.
As Fig. 1, shown in Figure 3, the upper end of blade 3 is provided with handle 2, and the upper end of handle 2 is provided with circular bubble 1, and circular bubble 1 can conveniently guarantee the vertical of bar.
When as shown in Figure 1, the bottom of blade 3 pallet 12 that is provided with rubber prevents apparatus measures blade 3 at bottom of trench because the deadweight excessive convergence.
As shown in Figure 1, also be provided with the fiber grating measurement mechanism that can move up and down along blade 3 on the blade 3.Described fiber grating measurement mechanism comprises stationary installation 6, fiber grating meter 7 and orienting device 10, and described fiber grating meter 7 is connected with stationary installation 6, and described orienting device 10 is connected with the measurement main body.As Fig. 4, shown in Figure 5, described stationary installation 6 is pincerlike stationary installation, and it comprises a connecting link and the collar, and the collar is that two semicircular rings are formed, and the described collar is nested on the blade 3, and an end connects described connecting link, the other end is undertaken fastening by nut.This stationary installation 6 can move up and down at the blade 3 of band scale.
As shown in Figure 8, described fiber grating meter 7 comprises meter housing 14, the top of meter housing 14 is provided with groove, be provided with three layers of ball roller 17 in the groove, rotatable housing circle is enclosed within outside the ball roller 17, so rotatable housing is rotatably connected with described meter housing 14 by some ball rollers 17.Therefore the measurement main body of fiber grating meter 7 (part that does not comprise rotatable housing) can be rotated under the flow force effect with orienting device 10, and ball roller 17 has played the effect of the resistance of reducing friction.
As Fig. 6, shown in Figure 7, orienting device 10 comprises the body of rod that is connected (can weld together) with described meter housing 14, and the end of the body of rod also is connected with 2 plates that vertically are provided with.One end of two plates all is connected with the described body of rod, and the two is 20 ° angle.Manually make measuring head roughly when water (flow) direction, orienting device 10 and rotating fiber grating meter 7(are with respect to rotatable housing, and fiber grating meter 7 is rotating) can under the effect of flowing water power, make the direction of measurement precision.
As shown in Figure 8, meter housing 14 1 ends of fiber grating meter 7 connect end cap 18.Fixing metal sheet 19 is installed on the end cap 18, and fixing metal sheet 19 is connected with semi-girder 15, and semi-girder 15 is provided with measures grating 16, measures grating 16 and is connected with optical fiber, and optical fiber passes end cap 18, and links to each other with plug 5 by light signal call wire 11.The end of semi-girder 15 is provided with metallic target sheet 20, and target sheet 20 will contact current, and the inventor has not also designed removable protective cover 9 to measuring staff outside metallic target sheet 20 in order to protect target sheet 20 time spent at ordinary times, and protective cover 9 is pulled up when measuring.The lower end of fiber grating meter 7 is a measuring head, and measuring head comprises the lower end and the target sheet 20 of semi-girder 15.Also be provided with cone rubber film 13 on semi-girder 15, an end of cone rubber film 13 is connected with meter housing 14, and the other end is enclosed within on the semi-girder 15 and sealing.The light signal call wire 11 that described fiber grating meter 7 is drawn is arranged in blade 3 is parallel by light signal call wire 11 pickup grooves 4 that are arranged on the blade 3.
Described measurement grating 16 is a double optical fiber grating, the middle part of the both sides that stick on semi-girder 15 of their symmetries.Specifically can be referring to patent CN101995485A, name is called " target type fiber grating velocimeter ".
As shown in Figure 9, the signal of measuring by the dark measuring staff of optical fiber flow velocity of the present invention reaches photosignal conversion equipment 21 through optical signal transmission 23, electrical signal conversion device can connect many other dark measuring staffs 25 simultaneously, and the electric signal transmission 24 after electrical signal conversion device is handled reaches data analysis computer 22 and analyzes.
Innovative point:
One, optical fiber flow velocity feeler adopts theory of the fiber optical, has advantages such as precision height, noise immunity are strong, waterproof, sees the theory of the fiber optical explanation for details;
Two, adopt the single lever-type design, wherein monitoring element can freely move up and down indicating on the bar of scale by draw-in groove, thereby realizes that multi-measuring point measures flow rate of liquid;
Three, volume is little, and easy accessibility is quick, can be used for experiment and engineering application monitoring minute fissure or irrigation canals and ditches place slurry flow rate;
Four, have additional functions such as monitoring measuring point water level and draining ditch depth;
Five, be equipped with detecting element orienting device 10, the optimum orientation of regulating element velocity measurement automatically, thus make measurement result more accurate.
Claims (10)
1. an optical fiber flow velocity feeler is characterized in that it comprises the blade of being with scale, and the upper end of blade is provided with handle, and the upper end of handle is provided with circular bubble, also is provided with the fiber grating measurement mechanism that can move up and down along blade on the blade.
2. a kind of optical fiber flow velocity feeler according to claim 1, it is characterized in that, described fiber grating measurement mechanism comprises stationary installation, fiber grating meter and orienting device, described stationary installation is connected with described blade, described fiber grating meter is connected with stationary installation, and described orienting device is connected with the fiber grating meter.
3. a kind of optical fiber flow velocity feeler according to claim 2 is characterized in that described stationary installation comprises a connecting link and the collar, and an end of the described collar connects described connecting link, the other end carries out fastening being nested on the blade by nut.
4. a kind of optical fiber flow velocity feeler according to claim 2 is characterized in that described fiber grating meter comprises the meter housing, and the meter housing is provided with rotatable housing, and described rotatable housing is connected with described stationary installation.
5. a kind of optical fiber flow velocity feeler according to claim 4 is characterized in that described rotatable housing is rotatably connected by some ball rollers and described meter housing.
6. a kind of optical fiber flow velocity feeler according to claim 2 is characterized in that described orienting device comprises the body of rod that is connected with described housing, and the end of the body of rod also is connected with at least one plates.
7. a kind of optical fiber flow velocity feeler according to claim 6 is characterized in that described plates are two, and the end of the two all is connected with the described body of rod, and the two has angle.
8. a kind of optical fiber flow velocity feeler according to claim 1 is characterized in that the bottom of described blade also is provided with pallet.
9. a kind of optical fiber flow velocity feeler according to claim 1 is characterized in that described blade is made up of by being threaded a plurality of minutes blades, links to each other by screw thread between described handle and the blade.
10. a kind of optical fiber flow velocity feeler according to claim 1 is characterized in that, the light signal call wire that described fiber grating meter is drawn is arranged in blade is parallel by the light signal call wire pickup groove that is arranged on the blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110123943XA CN102269770A (en) | 2011-05-13 | 2011-05-13 | Stick for gauging flow velocity of optical fibers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110123943XA CN102269770A (en) | 2011-05-13 | 2011-05-13 | Stick for gauging flow velocity of optical fibers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102269770A true CN102269770A (en) | 2011-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110123943XA Pending CN102269770A (en) | 2011-05-13 | 2011-05-13 | Stick for gauging flow velocity of optical fibers |
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| CN (1) | CN102269770A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014482A (en) * | 2016-07-08 | 2016-10-12 | 山东新河矿业有限公司 | Sensor positioning device for dynamically monitoring underground water of coal mine |
| CN106483328A (en) * | 2016-10-14 | 2017-03-08 | 华北电力大学 | A kind of transformer oil flow velocity on-line monitoring system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4854166A (en) * | 1987-11-10 | 1989-08-08 | United States Of America, As Represented By The Secretary Of The Interior | Lightweight wading rod for stream flow measurements |
| CN2549438Y (en) * | 2002-06-27 | 2003-05-07 | 沈波 | Digital open channel flowmeter |
| CN1758061A (en) * | 2005-11-04 | 2006-04-12 | 南开大学 | Sensing device for optical fiber optical grating flow speed |
| CN101059398A (en) * | 2007-04-26 | 2007-10-24 | 中国矿业大学 | Disc type brake performance detection method and the device |
| CN201034621Y (en) * | 2006-12-22 | 2008-03-12 | 武汉大学 | Current velocity sensor |
| US7530174B1 (en) * | 2007-07-19 | 2009-05-12 | The United States Of America As Represented By The Secretary Of The Interior | Wading rod level assembly |
| CN101887067A (en) * | 2010-06-25 | 2010-11-17 | 苏忆 | Multifunctional wind vane |
| CN202066870U (en) * | 2011-05-13 | 2011-12-07 | 山东大学 | Optical fiber flow velocity detection rod |
-
2011
- 2011-05-13 CN CN201110123943XA patent/CN102269770A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4854166A (en) * | 1987-11-10 | 1989-08-08 | United States Of America, As Represented By The Secretary Of The Interior | Lightweight wading rod for stream flow measurements |
| CN2549438Y (en) * | 2002-06-27 | 2003-05-07 | 沈波 | Digital open channel flowmeter |
| CN1758061A (en) * | 2005-11-04 | 2006-04-12 | 南开大学 | Sensing device for optical fiber optical grating flow speed |
| CN201034621Y (en) * | 2006-12-22 | 2008-03-12 | 武汉大学 | Current velocity sensor |
| CN101059398A (en) * | 2007-04-26 | 2007-10-24 | 中国矿业大学 | Disc type brake performance detection method and the device |
| US7530174B1 (en) * | 2007-07-19 | 2009-05-12 | The United States Of America As Represented By The Secretary Of The Interior | Wading rod level assembly |
| CN101887067A (en) * | 2010-06-25 | 2010-11-17 | 苏忆 | Multifunctional wind vane |
| CN202066870U (en) * | 2011-05-13 | 2011-12-07 | 山东大学 | Optical fiber flow velocity detection rod |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014482A (en) * | 2016-07-08 | 2016-10-12 | 山东新河矿业有限公司 | Sensor positioning device for dynamically monitoring underground water of coal mine |
| CN106014482B (en) * | 2016-07-08 | 2018-07-17 | 山东新河矿业有限公司 | Sensor locator for underground coal mine water dynamic monitoring |
| CN106483328A (en) * | 2016-10-14 | 2017-03-08 | 华北电力大学 | A kind of transformer oil flow velocity on-line monitoring system |
| CN106483328B (en) * | 2016-10-14 | 2020-04-28 | 华北电力大学 | Transformer oil flow rate on-line monitoring system |
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Application publication date: 20111207 |