CN202928631U - Force measuring optical fiber flow meter - Google Patents
Force measuring optical fiber flow meter Download PDFInfo
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- CN202928631U CN202928631U CN 201220610500 CN201220610500U CN202928631U CN 202928631 U CN202928631 U CN 202928631U CN 201220610500 CN201220610500 CN 201220610500 CN 201220610500 U CN201220610500 U CN 201220610500U CN 202928631 U CN202928631 U CN 202928631U
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- measuring tube
- force
- dynamometry
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Abstract
The utility model discloses a force measuring optical fiber flow meter, which comprises a shell (10), a measuring tube (20), a force measuring membrane (30), a fixing beam (50) and an optical fiber grating (40), wherein the force measuring optical fiber flow meter is fixedly connected with a measured pipeline by the shell (10); the measuring tube (20) is arranged outside a side wall of the shell (10) and both ends of the measuring tube (20) are hermetically communicated with the interior of the shell (10); the force measuring membrane (30) is arranged in the measuring tube (20) and deforms under pressure of fluid; the fixing beam (50) is arranged in the measuring tube (20) for fixing the optical fiber grating (40) and is arranged on one side of the force measuring membrane (30) towards the flow direction of the fluid; and the optical fiber grating (40) is fixedly arranged between the fixing beam (50) and the force measuring membrane (30) for measuring force produced by flow of the fluid. By using the force measuring optical fiber flow meter, the problems of influence of the flow meter on the flow rate and the flow field of the original pipeline, influence of other additional effects on the optical fiber and the like are solved, and the structure and the process of the flow meter are simplified.
Description
Technical field
The utility model relates to the flow rate test technical field, relates in particular to a kind of force-measuring type optical fibre flowmeter, is applicable to measure the flow of fluid.
Background technology
In a lot of fields of commercial production and people's lives, all need the flow of convection cell to monitor.At present, target type meter commonly used is when flowing through target plate by liquid, target plate to be produced pressure, make target plate band moving-target bar produce microdisplacement, record displacement and displacement is converted to electric signal input analytical equipment by electric transducer and calculate, draw at last flow number.But, the electrical type sensor exist poor, the easy electric leakage of sealing, perishable, be subjected to the problems such as electromagnetic interference (EMI).
Fibre Optical Sensor adopts optical fiber to carry out sensing and transmission, does not have the problems referred to above, has therefore in recent years obtained increasing attention.But still there is more problem in present optical fibre flowmeter.
The people such as Li Chuan have proposed a kind of target type fiber grating liquid flowmeter (Chinese invention patent application 200910094845.0), the pressure on the choked flow target that this flowmeter adopts a series of transmission mechanisms such as choked flow target, connecting rod, cantilever that fluid is caused passes to fiber grating, and the variation by grating spectrum records flow.The deficiency of this design is: 1) the choked flow target has affected flow field and the flow in original pipeline; 2) need to increase the shaft seal sheet, strip hole etc. is set, technique and complex structure especially need this movable agency of connecting rod is sealed, and reliability is low.
The people such as Zhang Qiang have proposed " with the fiber grating liquid flow sensor of temperature compensation " (Chinese invention patent application 200910229030.9) equally, adopt " elasticity tongue " to experience the pressure that fluid causes in this sensor, its deficiency is: 1) elasticity tongue itself can affect original ducted flow and flow field characteristic equally; 2) direction of fiber grating and flow direction are not parallel, and Fluid Flow in A can produce extra-stress to fiber grating, thereby affect measuring accuracy.
The people such as Gao Yingjun also disclose a kind of similar structure in utility model patent " optical fiber raster flow sensor ", this structure adopts the method that fiber grating is arranged on " tablet " to carry out flow measurement, and tablet is experienced the pressure of fluid.This scheme exists and above-mentioned two deficiencies that scheme is identical: tablet can affect original ducted flow and flow field characteristic equally.In addition, fiber grating and tablet are connected as a single entity easily to produce and warble, thereby affect measuring accuracy.
Therefore, how to make flowmeter not affect flow and the flow field of former pipeline, make optical fiber not be subjected to the impact of other adjection and improve sensitivity, and structure and the technique of simplifying flowmeter, the problem that optical fibre flowmeter is needed solution at present badly become.
The utility model content
The technical matters that (one) will solve
In view of this, fundamental purpose of the present utility model is to provide a kind of force-measuring type optical fibre flowmeter, and to solve flow and the flow field of the former pipeline of flowmeter impact, optical fiber is subjected to the problems such as impact of other adjection, and structure and the technique of simplifying flowmeter.
(2) technical scheme
For achieving the above object, the utility model provides a kind of force-measuring type optical fibre flowmeter, and this force-measuring type optical fibre flowmeter comprises: with this force-measuring type optical fibre flowmeter and the affixed shell 10 of tested pipeline; Be installed on shell 10 sidewall outsides and two ends all with the measuring tube 20 of shell 10 inner sealing UNICOMs; Be installed on measuring tube 20 inside produce distortion under the pressure of fluid dynamometry diaphragm 30; Be installed on the fixed beam 50 of the inner fixed fiber grating 40 of measuring tube 20, and fixed beam 50 is arranged at dynamometry diaphragm 30 and meets a side to fluid flow direction; And the fiber grating 40 that is fixed in the power of measuring the Fluid Flow in A generation between fixed beam 50 and dynamometry diaphragm 30.
In such scheme, described shell 10 is the cylindrical of hollow, and its sidewall has two holes, and the two ends of measuring tube 20 are by these two holes and shell 10 inner sealing UNICOMs.
In such scheme, the end that described measuring tube 20 enters at fluid has a fair water fin 60, and in tested pipeline, a certain proportion of fluid enters measuring tube 20 under the water conservancy diversion of this fair water fin 60.
In such scheme, described dynamometry diaphragm 30 is circular, is fixed in the inwall of measuring tube 20 by at least one root 31, and between the inwall of dynamometry diaphragm 30 and measuring tube 20, the gap that allows fluid pass through is arranged.
In such scheme, the rigidity of described fixed beam 50 is greater than the rigidity of dynamometry diaphragm 30, and the sectional area of fixed beam 50 in measuring tube 20 is less than the sectional area of dynamometry diaphragm 30.
In such scheme, described fixed beam 50 is installed on this measuring tube 20 inside, and there are a center pit 51 in the central authorities of this fixed beam 50, and described fiber grating 40 is affixed with this fixed beam 50 by this center pit 51.
In such scheme, an end of described fiber grating 40 is fixed in the center 32 of dynamometry diaphragm 30, and the other end passes successively the center pit 51 of this fixed beam 50 and the fairlead on this measuring tube 20 sidewalls and drawn.
(3) beneficial effect
Can find out from technique scheme, the utlity model has following beneficial effect:
1, this force-measuring type optical fibre flowmeter that provides of the utility model adopts the mode of the measuring tube measurement former pipeline outside, has reduced to greatest extent the flow of former pipeline and the impact in flow field.
2, this force-measuring type optical fibre flowmeter that provides of the utility model, the method by installing optical fibres grating between fixed beam 50 and dynamometry diaphragm 30 makes fiber grating be parallel to direction of flow, has reduced the adjection of fluid to optical fiber.
3, this force-measuring type optical fibre flowmeter that provides of the utility model, by measuring tube is set outside former pipeline and between fixed beam 50 and dynamometry diaphragm 30 method of installing optical fibres grating, simplified sensor construction and technique.
Description of drawings
The schematic diagram of the force-measuring type optical fibre flowmeter that Fig. 1 provides for the utility model;
The schematic diagram of the dynamometry diaphragm of the force-measuring type optical fibre flowmeter that Fig. 2 provides for the utility model;
The schematic diagram of the fixed beam of the force-measuring type optical fibre flowmeter that Fig. 3 provides for the utility model.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the utility model is further described.
Please refer to Fig. 1-Fig. 3, the schematic diagram of the force-measuring type optical fibre flowmeter that Fig. 1 provides for the utility model; The schematic diagram of the dynamometry diaphragm of the force-measuring type optical fibre flowmeter that Fig. 2 provides for the utility model; The schematic diagram of the fixed beam of the force-measuring type optical fibre flowmeter that Fig. 3 provides for the utility model.
This force-measuring type optical fibre flowmeter comprises: with this force-measuring type optical fibre flowmeter and the affixed shell 10 of tested pipeline; Be installed on shell 10 sidewall outsides and two ends all with the measuring tube 20 of shell 10 inner sealing UNICOMs; Be installed on measuring tube 20 inside produce distortion under the pressure of fluid dynamometry diaphragm 30; Be installed on the fixed beam 50 of the inner fixed fiber grating 40 of measuring tube 20, and fixed beam 50 is arranged at dynamometry diaphragm 30 and meets a side to fluid flow direction; And the fiber grating 40 that is fixed in the power of measuring the Fluid Flow in A generation between fixed beam 50 and dynamometry diaphragm 30.
Wherein, shell 10 is the cylindrical of hollow, and its sidewall has two holes, and the two ends of measuring tube 20 are by these two holes and shell 10 inner sealing UNICOMs.The end that measuring tube 20 enters at fluid has a fair water fin 60, and in tested pipeline, a certain proportion of fluid enters measuring tube 20 under the water conservancy diversion of this fair water fin 60.Dynamometry diaphragm 30 is circular, is fixed in the inwall of measuring tube 20 by at least one root 31, and between the inwall of dynamometry diaphragm 30 and measuring tube 20, the gap that allows fluid pass through is arranged.The rigidity of fixed beam 50 is greater than the rigidity of dynamometry diaphragm 30.Fixed beam 50 is installed on this measuring tube 20 inside, and there are a center pit 51 in the central authorities of this fixed beam 50, and described fiber grating 40 is affixed with this fixed beam 50 by this center pit 51.One end of fiber grating 40 is fixed in the center 32 of dynamometry diaphragm 30, and the other end passes successively the center pit 51 of this fixed beam 50 and the fairlead on this measuring tube 20 sidewalls and drawn.
The principle of work of the force-measuring type optical fibre flowmeter that the utility model provides is that with reference to figure 1, Fig. 2 and Fig. 3, when fluid flowed in shell 10, a part of fluid entered measuring tube 20.The sectional area of fixed beam 50 in measuring tube 20 is much smaller than the sectional area of dynamometry diaphragm 30, and the rigidity of fixed beam 50 is much larger than the rigidity of dynamometry diaphragm 30, therefore when fluid flows through in measuring tube 20, distance between the center 51 of fixed beam 50 and the center 32 of dynamometry diaphragm 30 can change, thereby cause that the fiber grating 40 during being fixed on produces strain, changing by the output wavelength of measuring grating 40 to obtain uninterrupted.
Need to prove, for wavelength-modulated type Fibre Optical Sensor, sensitive element is not limited to fiber grating, and namely fiber grating 40 can be replaced by other device and obtain same effect, other device such as fiber laser, long-period gratings, chirp grating etc.
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (7)
1. a force-measuring type optical fibre flowmeter, is characterized in that, this force-measuring type optical fibre flowmeter comprises:
With this force-measuring type optical fibre flowmeter and the affixed shell (10) of tested pipeline;
Be installed on shell (10) sidewall outside and two ends all with the measuring tube (20) of shell (10) inner sealing UNICOM;
Be installed on the inner dynamometry diaphragm (30) that produces distortion under the pressure of fluid of measuring tube (20);
Be installed on the fixed beam (50) of the inner fixed fiber grating of measuring tube (20) (40), and fixed beam (50) is arranged at dynamometry diaphragm (30) and meets a side to fluid flow direction; And
Be fixed in the fiber grating (40) of the power of measuring the Fluid Flow in A generation between fixed beam (50) and dynamometry diaphragm (30).
2. force-measuring type optical fibre flowmeter according to claim 1, is characterized in that, described shell (10) is the cylindrical of hollow, and its sidewall has two holes, and the two ends of measuring tube (20) are by these two holes and shell (10) inner sealing UNICOM.
3. force-measuring type optical fibre flowmeter according to claim 1, it is characterized in that, the end that described measuring tube (20) enters at fluid has a fair water fin (60), and in tested pipeline, a certain proportion of fluid enters measuring tube (20) under the water conservancy diversion of this fair water fin (60).
4. force-measuring type optical fibre flowmeter according to claim 1, it is characterized in that, described dynamometry diaphragm (30) is circular, be fixed in the inwall of measuring tube (20) by at least one root (31), and between the inwall of dynamometry diaphragm (30) and measuring tube (20), the gap that allows fluid pass through arranged.
5. force-measuring type optical fibre flowmeter according to claim 1, it is characterized in that, the rigidity of described fixed beam (50) is greater than the rigidity of dynamometry diaphragm (30), and the sectional area of fixed beam (50) in measuring tube (20) is less than the sectional area of dynamometry diaphragm (30).
6. force-measuring type optical fibre flowmeter according to claim 1, it is characterized in that, described fixed beam (50) is installed on this measuring tube (20) inside, and there is a center pit (51) in the central authorities of this fixed beam (50), and described fiber grating (40) is affixed by this center pit (51) and this fixed beam (50).
7. optical-fiber laser vortex shedding flow meter according to claim 6, it is characterized in that, one end of described fiber grating (40) is fixed in the center (32) of dynamometry diaphragm (30), and the other end passes successively the center pit (51) of this fixed beam (50) and the fairlead on this measuring tube (20) sidewall and drawn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220610500 CN202928631U (en) | 2012-11-16 | 2012-11-16 | Force measuring optical fiber flow meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220610500 CN202928631U (en) | 2012-11-16 | 2012-11-16 | Force measuring optical fiber flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202928631U true CN202928631U (en) | 2013-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220610500 Expired - Fee Related CN202928631U (en) | 2012-11-16 | 2012-11-16 | Force measuring optical fiber flow meter |
Country Status (1)
| Country | Link |
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| CN (1) | CN202928631U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944270A (en) * | 2012-11-16 | 2013-02-27 | 中国科学院半导体研究所 | Dynamometry-type optical fiber flowmeter |
| CN113252229A (en) * | 2021-07-15 | 2021-08-13 | 成都辰迈科技有限公司 | Non-static fluid pressure measuring device and using method thereof |
-
2012
- 2012-11-16 CN CN 201220610500 patent/CN202928631U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944270A (en) * | 2012-11-16 | 2013-02-27 | 中国科学院半导体研究所 | Dynamometry-type optical fiber flowmeter |
| CN113252229A (en) * | 2021-07-15 | 2021-08-13 | 成都辰迈科技有限公司 | Non-static fluid pressure measuring device and using method thereof |
| CN113252229B (en) * | 2021-07-15 | 2021-09-14 | 成都辰迈科技有限公司 | Non-static fluid pressure measuring device and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20130508 Termination date: 20151116 |
|
| EXPY | Termination of patent right or utility model |