CN103162748B - A kind of optical floater flowmeter - Google Patents
A kind of optical floater flowmeter Download PDFInfo
- Publication number
- CN103162748B CN103162748B CN201310043897.1A CN201310043897A CN103162748B CN 103162748 B CN103162748 B CN 103162748B CN 201310043897 A CN201310043897 A CN 201310043897A CN 103162748 B CN103162748 B CN 103162748B
- Authority
- CN
- China
- Prior art keywords
- float
- optical
- measuring diaphragm
- measuring
- flowmeter
- 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
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of optical floater flowmeter, this optical floater flowmeter comprises: the mozzle being installed on tested pipeline; Be installed on mozzle inner in order to rotate under action of a fluid and vibrative float; Be installed on the inner measuring diaphragm in order to experience the vibration that float produces of mozzle; And the fiber grating in order to measuring vibrations frequency on measuring diaphragm is fixed at two ends.The present invention's employing increases projection and on measuring diaphragm, increases the method for depression on float, adds the vibrational excitation of float to measuring diaphragm, improves the sensitivity of sensor; The vibration caused by measurement float instead of rotation carry out measuring flow, and by increasing the diversion trench of float, not only simplifying the design of flowmeter, and ensure that flowmeter can detect the situation of low discharge; The vibration caused by measuring float causes the wavelength variations of the fiber grating on measuring diaphragm to detect flow, avoids intensity detection and cannot detect small-signal and be subject to the larger problem of external interference.
Description
Technical field
The present invention relates to flow measurement technology field, particularly relate to a kind of optical floater flowmeter, be applicable to the flow measuring fluid.
Background technology
In a lot of fields of commercial production and people's lives, the flow of convection cell is all needed to monitor.At present, conventional flow is in respect of target type meter, turbo flow meter, vortex shedding flow meter etc.These flowmeters are record power, rotating speed or vibration signal input analytical equipment by electric transducer to calculate mostly, finally draw flow number.But, electrical type sensor exist sealing difference, easily electric leakage, perishable, by problems such as electromagnetic interference (EMI).
Fibre Optical Sensor adopts optical fiber to carry out sensing and transmission, there are not the problems referred to above, therefore in recent years obtains increasing attention.But still there is more problem in current optical fibre flowmeter.
Disclose a kind of optical floater flowmeter in patent 200620046512.2, adopt the method for intensity modulated.When flow is less, the output of this sensor is very little, cannot detect low discharge.And the impact that light path receives external environment is comparatively large, thus causes flow error larger.
The people such as Zhao Dong propose the design (Zhao Dong etc. of optical floater flowmeter, " based on all-fiber flux of vortex street measuring method of white light interference theory; " Chinese journal of scientific instrument, 2011), this eddy currents flowmeter adopts fiber perpendicular to arrange in the flow direction, by the pressure of fluid, fiber lengths is changed.Its deficiency is: 1) optical fiber itself is as bluff body, and stressed little, sensitivity is low, especially the situation of low discharge; 2) sensor comprises a fibre optic interferometer, system complex; 3) when fluid viscosity is larger, optical fiber is easy to be thrust by fluid; 4) a lot of fluid has corrosive attack to fiber optic materials itself, and applicable type of fluid is limited.
The people such as Zheng Lunjia disclose one and " comprise the Karman vortex flow meter assembly of fiber Bragg grating sensor and measure the method for rate of flow of fluid " (Chinese Patent Application No. 200780047600.1), after vortex generator, arrange fiber grating in the program, its deficiency is: 1) when fluid viscosity is larger, optical fiber is easy to be thrust by fluid; 2) a lot of fluid has corrosive attack to fiber optic materials itself, and applicable type of fluid is limited; 3) optical fiber impression is the strain produced due to vortex generator distortion, instead of the displacement of energy converter that the eddy current that produces of vortex generator causes, and therefore sensitivity is lower; 4) vortex street is difficult to when flow is little produce, and therefore cannot measure low discharge.
Therefore, how to protect optical fiber not by the impact of fluid itself, and the sensitivity improving flowmeter becomes the problem that solution needed at present badly by optical fibre flowmeter.
The present invention proposes a kind of optical floater flowmeter, and for the monitoring of fluid flow, emphasis solves optical fiber in existing fiber flowmeter by the impact of fluid itself and cannot detect the problem that low discharge and sensitivity has much room for improvement.
Summary of the invention
(1) technical matters that will solve
In view of this, fundamental purpose of the present invention is to provide a kind of optical floater flowmeter, to solve optical fiber in existing fiber flowmeter by the impact of fluid itself and cannot detect the problem that low discharge and sensitivity has much room for improvement.
(2) technical scheme
For achieving the above object, the invention provides a kind of optical floater flowmeter, this optical floater flowmeter comprises: the mozzle 10 being installed on tested pipeline; Be installed on mozzle 10 inside in order to rotate under action of a fluid and vibrative float 50; Be installed on mozzle 10 inside in order to experience the measuring diaphragm 20 of the vibration of float 50 generation; And the fiber grating 30 in order to measuring vibrations frequency on measuring diaphragm 20 is fixed at two ends.
In such scheme, the end face that described float 50 contacts with measuring diaphragm 20 is provided with to reduce the friction of float 50 and measuring diaphragm 20 further and strengthens the projection 51 of the vibration of the measuring diaphragm 20 that float 50 causes.
In such scheme, described float 50 is a frustum cone structure, is provided with the diversion trench 52 of the rotation of the float 50 caused in order to enhance fluid in its side further.
In such scheme, the cross-sectional area of described measuring diaphragm 20 is less than the cross-sectional area of described float 50.
In such scheme, described measuring diaphragm 20 is provided with symmetrical rib 21 further, and is fixed by rib 21 and mozzle 10.
In such scheme, described measuring diaphragm 20 is provided with depression 22 further, coordinates with the projection 51 of float 50, strengthens the vibration of the measuring diaphragm 20 that float 50 causes.
In such scheme, described fiber grating 30 is installed on rib 21, to increase the sensitivity of flowmeter.
(3) beneficial effect
As can be seen from technique scheme, the present invention has following beneficial effect:
1, this optical floater flowmeter provided by the invention, adopts and to increase protruding on float and on measuring diaphragm, increase the method for depression, add the vibrational excitation of float to measuring diaphragm, improve the sensitivity of sensor.
2, this optical floater flowmeter provided by the invention, the vibration caused by measurement float instead of rotation carry out measuring flow, and by increasing the diversion trench of float, not only simplifying the design of flowmeter, and ensure that flowmeter can detect the situation of low discharge.
3, this optical floater flowmeter provided by the invention, the vibration caused by measuring float causes the wavelength variations of the fiber grating on measuring diaphragm to detect flow, avoids intensity detection and cannot detect small-signal and be subject to the larger problem of external interference.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of optical floater flowmeter provided by the invention;
Fig. 2 is float 50 schematic diagram in optical floater flowmeter provided by the invention;
Fig. 3 is the vertical view of measuring diaphragm 20 in optical floater flowmeter provided by the invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
Please refer to Fig. 1 ~ Fig. 3, Fig. 1 is the schematic diagram of optical floater flowmeter provided by the invention; Fig. 2 is float 50 schematic diagram in optical floater flowmeter provided by the invention; Fig. 3 is the vertical view of measuring diaphragm 20 in optical floater flowmeter provided by the invention.This optical floater flowmeter comprises: the mozzle 10 being installed on tested pipeline; Be installed on mozzle 10 inside in order to rotate under action of a fluid and vibrative float 50; Be installed on mozzle 10 inside in order to experience the measuring diaphragm 20 of the vibration of float 50 generation; The fiber grating 30 in order to measuring vibrations frequency on measuring diaphragm 20 is fixed at two ends.
The end face that float 50 contacts with measuring diaphragm 20 is provided with the friction for reducing float 50 and measuring diaphragm 20 further and strengthens the projection 51 of the vibration of the measuring diaphragm 20 that float 50 causes.Float 50 is a frustum cone structure, is provided with the diversion trench 52 of the rotation of the float 50 caused in order to enhance fluid in its side further.
The cross-sectional area of measuring diaphragm 20 is less than the cross-sectional area of float 50.Measuring diaphragm 20 can be provided with symmetrical rib 21 further, and is fixed by 21 and mozzle 10.Measuring diaphragm 20 can be provided with depression 22 further, coordinates with the projection 51 of float 50, strengthens the vibration of the measuring diaphragm 20 that float 50 causes.
Fiber grating 30 is generally installed on rib 21, to increase the sensitivity of flowmeter.Fiber grating 30 has certain structural initial pre stress.
The principle of work of optical floater flowmeter provided by the invention is, with reference to figure 1, Fig. 2, Fig. 3, when fluid flows in mozzle 10, float 50 floats in equilibrium position and rotates (especially in the situation having diversion trench 52) under hydrokinetic effect.Measuring diaphragm 20 vibrates along the axis direction perpendicular to mozzle 10 under the effect of float 50 when float 50 rotates, and drives the fiber grating 30 be mounted thereon to produce corresponding strain, causes the output light wavelength of fiber grating 30 to change.
The end face that float 50 contacts with measuring diaphragm 20 can be provided with protruding 51 further, and measuring diaphragm 20 can be provided with depression 22 further.When float 50 rotates, the projection 51 of float 50 can be absorbed in depression 22 under the effect of fluid flow forces, when float continues to rotate, protruding 51 screw out from depression 22 again, thus make float 50 be vibration vertically around the rotational translation of mozzle 10 axis, therefore can strengthen the vibration of the measuring diaphragm 20 that float 50 causes.The frequency of this vibration is consistent with the rotating speed of float 50, and the rotating speed of float 50 and flow proportional, therefore can by checking that the vibration frequency of measurement of fiber grating 30 record flow.
It should be noted that, for wavelength-modulated type Fibre Optical Sensor, sensitive element is not limited to fiber grating, and namely fiber grating 30 can be replaced by other device and obtain same effect, and other device is as fiber laser, long-period gratings, chirp grating etc.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. an optical floater flowmeter, is characterized in that, this optical floater flowmeter comprises:
Be installed on the mozzle (10) of tested pipeline;
Be installed on mozzle (10) inner in order to rotate under action of a fluid and vibrative float (50);
Be installed on mozzle (10) inner in order to experience the measuring diaphragm (20) of the vibration that float (50) produces; And
The fiber grating (30) in order to measuring vibrations frequency on measuring diaphragm (20) is fixed at two ends;
Wherein, the end face that described float (50) contacts with measuring diaphragm (20) is provided with to reduce the friction of float (50) and measuring diaphragm (20) further and strengthens the projection (51) of the vibration of the measuring diaphragm (20) that float (50) causes.
2. optical floater flowmeter according to claim 1, it is characterized in that, described float (50) is a frustum cone structure, is provided with the diversion trench (52) of the rotation of the float (50) caused in order to enhance fluid in its side further.
3. optical floater flowmeter according to claim 1, is characterized in that, the cross-sectional area of described measuring diaphragm (20) is less than the cross-sectional area of described float (50).
4. optical floater flowmeter according to claim 1, is characterized in that, described measuring diaphragm (20) is provided with symmetrical rib (21) further, and is fixed by rib (21) and mozzle (10).
5. optical floater flowmeter according to claim 1, it is characterized in that, described measuring diaphragm (20) is provided with depression (22) further, coordinate with the projection (51) of float (50), strengthen the vibration of the measuring diaphragm (20) that float (50) causes.
6. optical floater flowmeter according to claim 4, is characterized in that, described fiber grating (30) is installed on rib (21), to increase the sensitivity of flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310043897.1A CN103162748B (en) | 2013-02-04 | 2013-02-04 | A kind of optical floater flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310043897.1A CN103162748B (en) | 2013-02-04 | 2013-02-04 | A kind of optical floater flowmeter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103162748A CN103162748A (en) | 2013-06-19 |
| CN103162748B true CN103162748B (en) | 2016-01-20 |
Family
ID=48586023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310043897.1A Expired - Fee Related CN103162748B (en) | 2013-02-04 | 2013-02-04 | A kind of optical floater flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103162748B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547379B (en) * | 2015-12-22 | 2019-08-06 | 中国石油天然气股份有限公司 | A kind of petroleum downhole flowmeter based on dual-polarization state optical fibre device |
| CN108627204A (en) * | 2018-06-08 | 2018-10-09 | 合肥利都自动化仪表有限公司 | A kind of spinner flowmeter with convertible rotation float |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5743138A (en) * | 1997-01-22 | 1998-04-28 | Chartered Semiconductor Manufacturing Ltd. | Spirally fluted float |
| CN1229911A (en) * | 1998-03-20 | 1999-09-29 | 中国科学院西安光学精密机械研究所 | Detecting method and appts. for flow of pipeline coal powder |
| JPH11325986A (en) * | 1998-05-15 | 1999-11-26 | Wako Pure Chem Ind Ltd | Apparatus for preventing foreign matter from adhering flow-meter scale |
| CN200958952Y (en) * | 2006-09-29 | 2007-10-10 | 中国船舶重工集团公司第七一一研究所 | Float flowmeter |
| CN201016757Y (en) * | 2007-03-16 | 2008-02-06 | 程丽坤 | Antistatic rotary flow-meter |
| CN101285845A (en) * | 2007-04-11 | 2008-10-15 | 中国科学院半导体研究所 | Cantilever beam type optical fibre grating accelerometer |
| CN102288261A (en) * | 2011-07-19 | 2011-12-21 | 赵恩国 | Floating pontoon type fiber liquid level meter |
| CN102384772A (en) * | 2010-08-25 | 2012-03-21 | 西安金和光学科技有限公司 | Optical fiber type flow monitoring device |
| CN203083625U (en) * | 2013-02-04 | 2013-07-24 | 中国科学院半导体研究所 | Optical fiber floater flow-meter |
-
2013
- 2013-02-04 CN CN201310043897.1A patent/CN103162748B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5743138A (en) * | 1997-01-22 | 1998-04-28 | Chartered Semiconductor Manufacturing Ltd. | Spirally fluted float |
| CN1229911A (en) * | 1998-03-20 | 1999-09-29 | 中国科学院西安光学精密机械研究所 | Detecting method and appts. for flow of pipeline coal powder |
| JPH11325986A (en) * | 1998-05-15 | 1999-11-26 | Wako Pure Chem Ind Ltd | Apparatus for preventing foreign matter from adhering flow-meter scale |
| CN200958952Y (en) * | 2006-09-29 | 2007-10-10 | 中国船舶重工集团公司第七一一研究所 | Float flowmeter |
| CN201016757Y (en) * | 2007-03-16 | 2008-02-06 | 程丽坤 | Antistatic rotary flow-meter |
| CN101285845A (en) * | 2007-04-11 | 2008-10-15 | 中国科学院半导体研究所 | Cantilever beam type optical fibre grating accelerometer |
| CN102384772A (en) * | 2010-08-25 | 2012-03-21 | 西安金和光学科技有限公司 | Optical fiber type flow monitoring device |
| CN102288261A (en) * | 2011-07-19 | 2011-12-21 | 赵恩国 | Floating pontoon type fiber liquid level meter |
| CN203083625U (en) * | 2013-02-04 | 2013-07-24 | 中国科学院半导体研究所 | Optical fiber floater flow-meter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103162748A (en) | 2013-06-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102901593B (en) | Fiber Bragg grating soil pressure sensor based on two L-type beams | |
| CN102980615B (en) | Optical fiber vortex shedding flowmeter | |
| CN103913593B (en) | Fan-shaped fiber bragg grating flow sensor package with temperature self-compensating function | |
| CN102141421A (en) | Device and method for measuring flow of all-fiber interferometer | |
| CN203191143U (en) | Fiber grating sensor used for measuring pressure of liquid | |
| CN106153978A (en) | Flow velocity based on optical fiber MEMS method amber microcavity test device and method of testing | |
| CN103162748B (en) | A kind of optical floater flowmeter | |
| CN102937465B (en) | Vortex street flow-meter using fiber laser | |
| CN102944269B (en) | A kind of optical fiber laser flow meter | |
| CN203083625U (en) | Optical fiber floater flow-meter | |
| CN202928626U (en) | Optical fiber vortex flowmeter | |
| Ni et al. | Non-intrusive flow measurement based on a distributed feedback fiber laser | |
| CN102937468B (en) | Optical fiber flow meter based on bourdon tube | |
| CN103076049A (en) | Pressure difference type optical fiber flow meter | |
| CN202928627U (en) | Optical fiber flow meter based on bourdon tube | |
| CN204085542U (en) | A kind of two circle coaxial-type optic fibre turbo flowmeter | |
| CN209148008U (en) | A kind of Culture complex security system based on fiber grating | |
| CN106123980A (en) | A kind of probe type flow meter based on fiber grating | |
| CN104567986A (en) | FBG (fiber bragg grating)-based multifunctional flow sensor provided with embedded standard nozzle | |
| CN202928625U (en) | Optical fiber laser vortex flowmeter | |
| CN105699690A (en) | A vortex street wind speed sensor based on fiber gratings and an assembly method thereof | |
| CN202995055U (en) | Optical fiber sensing device for sensing presence of liquid | |
| CN202547700U (en) | Double-fiber Bragg grating differential pressure flowmeter | |
| CN202928631U (en) | Force measuring optical fiber flow meter | |
| CN202994213U (en) | Fiber laser flowmeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20180204 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |