CN106052781A - Single-piston fiber flow sensor probe and detection method thereof - Google Patents
Single-piston fiber flow sensor probe and detection method thereof Download PDFInfo
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- CN106052781A CN106052781A CN201610367241.9A CN201610367241A CN106052781A CN 106052781 A CN106052781 A CN 106052781A CN 201610367241 A CN201610367241 A CN 201610367241A CN 106052781 A CN106052781 A CN 106052781A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/661—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters using light
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention provides a single-piston fiber flow sensor probe and a detection method thereof, and belongs to the field of flow detection. The sensor probe comprises a piston cylinder and a detection box arranged at one side of the piston cylinder, the two ends of the piston cylinder are respectively enclosed by end covers, a piston is slidably arranged in the piston cylinder, the portion between the piston and each end cover is provided with a spring and a piston rod, the end covers are provided with detection through holes, one end of each piston rod is fixed on the piston, the other ends of the piston rods are slidably arranged in the detection through holes, reflecting parts are fixed at the end portions of the piston rods, the other ends of the detection through holes are provided with fiber detection ends, the detection box communicates with chambers at the two sides of the piston respectively through fluid pathways, the fluid pathways and a gas source are respectively arranged at two opposite sides of a circulation path of a fluid inside the detection box. The problem is solved that an existing flow sensor probe commonly employing a conventional power measurement mode is not quite competent in many occasions due to such restrictions as not high measurement precision, large energy consumption and the like.
Description
Technical field
The present invention relates to a kind of flow transducer probe, belong to flow sensing monitoring technical field.
Background technology
During modern industry produces especially automated production, it is often required to monitor with various sensors and control to produce
During parameters, make equipment be operated in normal condition or optimum state, and make product reach best quality.Sensor
Penetrate into such as commercial production, space development, marine exploration, environmental conservation, resource investigation, medical diagnosis, biological work the most already
The field that journey, even historical relic's protection etc. are the most general.The present invention is one of the sensor of numerous classification flow transducer.
Along with the development of sensor technology, diversified flow transducer occurred, the most frequently used has vane type, vortex street
Formula, karman vortex are rotating, hot wire type etc..But, the sensor such as such as vane type, eddy currents, rotating, the hot wire type of karman vortex, principle
The dynamometry mode that many employings are traditional, has the limitations such as certainty of measurement is the highest, power consumption is big, can not win well in a lot of occasions
Appoint.
Summary of the invention
It is an object of the invention to: provide a kind of single-piston optic flow sensor probe and detection method thereof, to solve
The dynamometry mode that the many employings of existing flow transducer are traditional, has the limitations such as certainty of measurement is the highest, power consumption is big, in a lot of fields
The problem that conjunction can not be competent at well.
The solution of the present invention is as follows: a kind of single-piston optic flow sensor probe, including piston cylinder be arranged at piston
The detection case of cylinder side, the two ends of piston cylinder are closed by end cap respectively, and sliding in piston cylinder is provided with piston, piston and two ends
Being respectively provided with spring and piston rod between end cap, one end of spring is fixed on piston, and the other end is fixed on end cap, described two ends
End cap on all offer detection through hole, one end of piston rod is fixed on piston, the other end be slideably positioned in detection through hole in,
And the end being slideably positioned in the piston rod in detection through hole is fixed with reflecting part, the other end of detection through hole is additionally provided with light
Fine test side, the fibre bundle of fiber laser arrays end is formed by incident optical and outgoing optical fiber set armouring, the incident optical other end with
Light source docks, and in order to couple incident illumination, the exit end of outgoing optical fiber is connected with light-sensitive element, output light intensity signal, by going out
The power penetrating optical fiber received signal i.e. can determine whether the distance between reflecting part and fiber laser arrays end, thus calculates the cunning of piston
Dynamic distance, can extrapolate the pressure reduction of the fluid entering piston both sides further；
There is fluid intake and fluid issuing to enable flow across the inside of detection case, detection case and piston cylinder on detection case
The chamber of middle piston both sides is connected by a fluid passage respectively, also includes source of the gas, and the supply direction of source of the gas points to two
The centre position of fluid passage, and fluid passage is respectively arranged at fluid at relative the two of detection case internal flow path with source of the gas
Side, is arranged such, and when the fluid in detection case does not circulates, the fluid pressure flowing into piston two side cavity should be identical, then live
Plug can be in equilbrium position and keep constant, and after fluid flows, the fluid pressure flowing into piston two side cavity is different, then
Piston can slide, and the change of this pressure will be reflected in the change in optical signal of fibre-optical probe detection, i.e. by this sensing
Device detects the information such as fluid flow.
In order to avoid the spring impact on sensor, the spring of piston both sides is symmetrical arranged, and the spring of piston both sides
Structure and specification are the most identical, and when piston is positioned at the centre position of two ends end cap, the spring of piston both sides is in nature
State, i.e. spring tensionless winkler foundation and compressive deformation；
For ensureing the sensing effect of fibre-optical probe, it is ensured that the distance balance between two ends fiber laser arrays end and reflecting part,
Two detection through holes are all opened in the center position of place end cap, and two detection through holes, piston and two piston rods are the most coaxial
Arranging, reflecting part is vertically arranged with fiber laser arrays end, and reflecting part is illuminator or reflecting piece, piston and the inwall of piston cylinder
Between for slipper seal formula structure, to prevent the fluid of piston both sides from penetrating into mutually, also for sliding between piston rod and detection through hole
Movable sealing structure, such as, the outside of piston rod is provided with sealing ring, realized by sealing ring and detect between through-hole wall close
Envelope, prevents fluid from flowing between reflecting part and fiber laser arrays end；
As preferred structure, one end of described fiber laser arrays end is tightened in detection through hole by screw thread, to protect
It is firm and accurate that card fibre-optical probe positions, and end cap is rubber stopper, it is ensured that on the premise of structural reliability, structure more simplifies；
For ensureing the sealing effectiveness of piston, prevent fluid from flowing into spring place chamber, piston and piston cylinder through piston ridge
Inwall between be provided with piston packing；
For ensureing service life and using effect, the preferred hard alloy of material of piston of sensor；
For preventing the impurity in fluid from entering sensor probe, described fluid passage is provided with filter screen.
A kind of single-piston fiber optic flow detection method, including:
Optical Fibre Differential-Pressure Seasor is popped one's head in and has the detection case of fluid distribution channel；
Optical Fibre Differential-Pressure Seasor probe includes the piston cylinder of tubular, has two by being slideably positioned in piston in piston cylinder
The fluid detection chamber that piston in cylinder separates, two fluid detection chambeies are connected with detection case respectively；
Detection case and two fluid detection chambeies are connected by two fluid passages respectively, are also correspondingly arranged at detection case
Towards the source of the gas of the centre position jet of two fluid passages, and the fluid that fluid passage and source of the gas are respectively arranged in detection case
The opposite sides of distribution channel, if flowing without detected fluid in detection case, then the pressure of two fluid detection intracavity is identical,
Optical Fibre Differential-Pressure Seasor probe detects that two chamber pressure reduction are zero；If there being detected fluid to flow in detection case, starting source of the gas and blowing
Form air-flow, then detected fluid interacts in detection case with air-flow so that detected fluid and the initial momentum of air-flow
Changing, fluid-mixing offsets in detection case, so that the fluid-mixing entering piston cylinder is formed in the both sides of piston
Pressure difference, piston, under the effect of two fluid detection chamber pressure reduction, to low pressure side sliding, and is visited by Optical Fibre Differential-Pressure Seasor
Head detection pressure reduction, sets up momentum pressure reduction mathematical model, calculates and draw fluid momentum.
Described momentum pressure reduction mathematical model is as follows: analyze the relation between transmission amount and pressure reduction, if the speed of air-flow is Vs,
The speed of detected fluid is V, wherein VsThe air velocity emitted by source of the gas, for known quantity, piston two ends pressure difference with
The momentum M of two fluidss/ M is relevant, and wherein M is detected fluid momentum, MsFor air-flow momentum, respectively withWith V2It is directly proportional；
M=kV2；
K is constant；
That is:
Then:
Wherein, k1For known quantity, thus can try to achieve the value of V after known Δ P, in test, we take VsEqual to 5m/
S, takes k1=2, V change by 1m/s to 2m/s, and its curve is as described in Figure 3.
The blowing direction of source of the gas is perpendicular with fluid circulating direction in detection case.
Compared with prior art, major advantage is as follows for the present invention: through structure design, theoretical research can with experimental analysis
Knowing, this sensor probe has less structure, higher degree of accuracy and reliability, well adapting to property and interchangeability etc., should
Sensor probe can be suitably used for numerous fluid flow detection occasion, photoelectric sensing principle is applied to field of flow detection, output
Signal output valve after opto-electronic conversion and signal processing calculate will change at double, thus improve detection sensitivity, have very
Important actual application value, design and popularization to Novel flow rate sensor probe serve great impetus.
Meanwhile, this differential pressure pick-up probe uses piston cylinder operator as pressure detection device, has pressure at two side liquids
During power difference, piston is translational motion, it is only necessary to can calculate fluid pressure differential, for Fibre Optical Sensor according to the translational movement of piston
Require lower, calculate and measure the simplest, and piston structure is more stable, is susceptible to external interference, is hardly damaged, use the longevity
It is the most permanent to order so that the reliability of sensor probe, adaptability and interchangeability have had relatively much progress, is suitable for use as fluid stream
The measurement of amount；The intensity compensation principle of sensor probe is the simplest, and practicality is higher.
Accompanying drawing explanation
Fig. 1 is the sectional view of this sensor probe configuration；
Fig. 2 is Cleaning Principle figure；
Fig. 3 is the relation of fluid momentum and piston both sides pressure difference.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below with reference to accompanying drawings the present invention is made into one
Step ground describes in detail,
Embodiment:
Referring to figs. 1 through Fig. 3, the present embodiment provides a kind of single-piston optic flow sensor probe, including piston cylinder 1 with set
Being placed in the detection case 2 of piston cylinder 1 side, the two ends of piston cylinder 1 are closed by end cap 3 respectively, and sliding in piston cylinder 1 is provided with piston
4, it is provided with piston packing 41 between the inwall of piston 4 and piston cylinder 1, between the end cap 3 at piston 4 and two ends, is respectively provided with spring
5 and piston rod 6, one end of spring 5 is fixed on piston 4, and the other end is fixed on end cap 3, and the spring 5 of piston 4 both sides is symmetrical
Arrange, and the structure of the spring 5 of piston 4 both sides and specification the most identical, piston 4 is positioned at the centre position of two ends end cap 3
Time, the spring 5 of piston 4 both sides is in naturalness, i.e. spring tensionless winkler foundation and compressive deformation, and the end cap 3 at described two ends is just
Center position all offers detection through hole 7, and one end of piston rod 6 is fixed on piston 4, and it is logical that the other end is slideably positioned in detection
In hole 7, the outside of piston rod 6 is provided with sealing ring, the sealing being realized by sealing ring and detecting between through hole 7 inwall, and sliding
The end of the dynamic piston rod 6 being arranged in detection through hole 7 is fixed with reflecting part 8, and two are detected through hole 7, piston 4 and two work
Stopper rod 6 is all coaxially disposed, and reflecting part 8 is vertically arranged with fiber laser arrays end 9, and reflecting part 8 is illuminator or reflecting piece, detection
The other end of through hole 7 is additionally provided with fiber laser arrays end 9, and one end of fiber laser arrays end 9 is tightened in detection through hole 7 by screw thread
In, the fibre bundle of fiber laser arrays end 9 is gathered armouring by incident optical 91 and outgoing optical fiber 92 and is formed, incident optical 91 other end with
Light source docks, and in order to couple incident illumination, the exit end of outgoing optical fiber 92 is connected with light-sensitive element, and output light intensity signal passes through
The power of outgoing optical fiber 92 received signal i.e. can determine whether the distance between reflecting part 8 and fiber laser arrays end 9, thus calculates work
The sliding distance of plug 4, can extrapolate the pressure reduction of the fluid entering piston 4 both sides further；
There is fluid intake 21 and fluid issuing 22 to enable flow across the inside of detection case 2 on detection case 2, detection case 2
It is connected by a fluid passage 10 respectively with the chamber of piston 4 both sides in piston cylinder 1, fluid passage 10 is provided with filter
Net 12, also includes source of the gas 11, and the centre position of two fluid passages 10, and fluid passage 10 He are pointed in the supply direction of source of the gas 11
Source of the gas 11 is respectively arranged at the fluid opposite sides at detection case 2 internal flow path, is arranged such, the stream in detection case 2
When body does not circulates, flow into 4 liang of side cavity of piston fluid pressure should be identical, then piston 4 can be in equilbrium position keep constant,
And after fluid flows, the fluid pressure flowing into 4 liang of side cavity of piston is different, then piston 4 can slide, this pressure
Change will be reflected in the change in optical signal of fibre-optical probe detection, i.e. detects the information such as fluid flow by this sensor.
A kind of method of single-piston fiber parametric amplification flow:
There are in piston cylinder 1 two fluid detection chambeies separated by the piston 4 being slideably positioned in piston cylinder 1, if inspection
Flow without detected fluid in measuring tank 2, then the pressure of two fluid detection intracavity is identical, Optical Fibre Differential-Pressure Seasor probe detection
It is zero to two chamber pressure reduction；If having detected fluid to flow in detection case 2, starting source of the gas 11 air blowing and forming air-flow, then detected fluid
Interact in detection case 2 with air-flow so that the initial momentum of detected fluid and air-flow changes, and fluid-mixing exists
Offseting in detection case 2, so that the fluid-mixing entering piston cylinder 1 forms pressure difference in the both sides of piston 4, piston 4 is two
Under the effect of individual fluid detection chamber pressure reduction, to low pressure side sliding, and by Optical Fibre Differential-Pressure Seasor probe detection pressure reduction, set up
Momentum pressure reduction mathematical model, calculates and draws fluid momentum.
Claims (9)
1. a single-piston optic flow sensor probe, it is characterised in that: include piston cylinder (1) and be arranged at piston cylinder (1)
The detection case (2) of side, respectively by end cap (3) closing, slides in piston cylinder (1) and is provided with piston in the two ends of piston cylinder (1)
(4), being respectively provided with spring (5) and piston rod (6) between the end cap (3) at piston (4) and two ends, work is fixed in one end of spring (5)
On plug (4), the other end is fixed on end cap (3), and the end cap (3) at described two ends all offers detection through hole (7), piston rod
(6) one end is fixed on piston (4), and the other end is slideably positioned in detection through hole (7), and is slideably positioned in detection through hole
(7) end of the piston rod (6) in is fixed with reflecting part (8), and the other end of detection through hole (7) is additionally provided with fiber laser arrays end
(9), the fibre bundle of fiber laser arrays end (9) is formed by incident optical (91) and outgoing optical fiber (92) set armouring；
There is fluid intake (21) and fluid issuing (22) to enable flow across the inside of detection case (2) on detection case (2), detection
Case (2) is connected by a fluid passage (10) respectively with the chamber of piston (4) both sides in piston cylinder (1), also includes source of the gas
(11), the centre position of two fluid passages (10) is pointed in the supply direction of source of the gas (11), and fluid passage (10) and source of the gas
(11) fluid opposite sides at detection case (2) internal flow path it is respectively arranged at.
A kind of single-piston optic flow sensor probe, it is characterised in that: piston (4) both sides
Spring (5) is symmetrical arranged, and the structure of the spring (5) of piston (4) both sides and specification the most identical, piston (4) is positioned at two ends
During the centre position of end cap (3), the spring (5) of piston (4) both sides is in naturalness.
A kind of single-piston optic flow sensor probe, it is characterised in that: two detection through holes
(7) be all opened in the center position of place end cap (3), two detections through hole (7), piston (4) and two piston rods (6) all with
Axle is arranged, and reflecting part (8) is vertically arranged with fiber laser arrays end (9), and reflecting part (8) is illuminator or reflecting piece, piston (4)
And for slipper seal formula structure between the inwall of piston cylinder (1), also for slipper seal between piston rod (6) and detection through hole (7)
Structure.
A kind of single-piston optic flow sensor probe, it is characterised in that: described fiber laser arrays end
(9) one end is tightened in detection through hole (7) by screw thread, and end cap (3) is rubber stopper.
A kind of single-piston optic flow sensor probe, it is characterised in that: piston (4) and piston
Piston packing (41) it is provided with between the inwall of cylinder (1).
A kind of single-piston optic flow sensor probe, it is characterised in that: described fluid passage
(10) filter screen (12) it is provided with on.
7. a single-piston fiber-optic sensor probe flow rate testing methods, it is characterised in that:
Including Optical Fibre Differential-Pressure Seasor probe with have the detection case (2) of fluid distribution channel；
Optical Fibre Differential-Pressure Seasor probe includes the piston cylinder (1) of tubular, has two by being slideably positioned in work in piston cylinder (1)
The fluid detection chamber that piston (4) in plug cylinder (1) separates, two fluid detection chambeies are connected with detection case (2) respectively；
Detection case (2) is connected by two fluid passages (10) respectively with two fluid detection chambeies, and detection case (2) place is the most corresponding
It is provided with the source of the gas (11) of centre position jet towards two fluid passages (10), and fluid passage (10) and source of the gas (11) point
The opposite sides of the fluid distribution channel not being arranged in detection case (2), if having detected fluid to flow in detection case (2), starts
Source of the gas (11) blow formed air-flow, then detected fluid interacts in detection case (2) with air-flow so that detected fluid with
The initial momentum of air-flow changes, and fluid-mixing offsets in detection case (2), so that entering the mixing of piston cylinder (1)
Fluid forms pressure difference in the both sides of piston (4), and piston (4) is under the effect of two fluid detection chamber pressure reduction, to low pressure side
Sliding, and by Optical Fibre Differential-Pressure Seasor probe detection pressure reduction, set up momentum pressure reduction mathematical model, calculate and draw fluid momentum.
Flow rate testing methods the most according to claim 7, it is characterised in that: described momentum pressure reduction mathematical model is as follows: analyze
Relation between transmission amount and pressure reduction, if the speed of air-flow is Vs, the speed of detected fluid is V, wherein VsIt is to be sent out by source of the gas (11)
The air velocity shot out, for known quantity, the momentum M of piston two ends pressure difference and two fluidss/ M is relevant, and wherein M is tested
Fluid momentum, MsFor air-flow momentum, respectively withWith V2It is directly proportional；
M=kV2；
K is constant；
That is:
Then:
Wherein, k1For known quantity, thus the value of V can be tried to achieve after known Δ P.
Flow rate testing methods the most according to claim 7, it is characterised in that: the blowing direction of source of the gas (11) and detection case (2)
Interior fluid circulating direction is perpendicular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610367241.9A CN106052781B (en) | 2016-05-30 | 2016-05-30 | A kind of single-piston optic flow sensor probe and its detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610367241.9A CN106052781B (en) | 2016-05-30 | 2016-05-30 | A kind of single-piston optic flow sensor probe and its detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106052781A true CN106052781A (en) | 2016-10-26 |
| CN106052781B CN106052781B (en) | 2019-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610367241.9A Expired - Fee Related CN106052781B (en) | 2016-05-30 | 2016-05-30 | A kind of single-piston optic flow sensor probe and its detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192480A (en) * | 2017-07-17 | 2017-09-22 | 河南科技大学 | A kind of clamping force checking device of block seedling planting machine |
| CN109405902A (en) * | 2017-08-17 | 2019-03-01 | 兰吉尔有限公司 | The sonic probe of the side wall with step for flowmeter |
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| JP2009063400A (en) * | 2007-09-06 | 2009-03-26 | Fiberlabs Inc | Differential optical fiber flow sensor and flow detection system using the same |
| CN104389581A (en) * | 2014-09-17 | 2015-03-04 | 中国石油大学(北京) | Underground fluid induction device and fluid flow velocity measuring system using same |
| CN105021343A (en) * | 2015-07-10 | 2015-11-04 | 贵州大学 | Single fiber bundle probe differential pressure sensor |
| CN105043649A (en) * | 2015-07-10 | 2015-11-11 | 贵州大学 | Probe structure of single fiber bundle differential pressure sensor |
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2016
- 2016-05-30 CN CN201610367241.9A patent/CN106052781B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009063400A (en) * | 2007-09-06 | 2009-03-26 | Fiberlabs Inc | Differential optical fiber flow sensor and flow detection system using the same |
| CN104389581A (en) * | 2014-09-17 | 2015-03-04 | 中国石油大学(北京) | Underground fluid induction device and fluid flow velocity measuring system using same |
| CN105021343A (en) * | 2015-07-10 | 2015-11-04 | 贵州大学 | Single fiber bundle probe differential pressure sensor |
| CN105043649A (en) * | 2015-07-10 | 2015-11-11 | 贵州大学 | Probe structure of single fiber bundle differential pressure sensor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192480A (en) * | 2017-07-17 | 2017-09-22 | 河南科技大学 | A kind of clamping force checking device of block seedling planting machine |
| CN107192480B (en) * | 2017-07-17 | 2023-03-24 | 河南科技大学 | Clamping force detection device of pot seedling planting machine |
| CN109405902A (en) * | 2017-08-17 | 2019-03-01 | 兰吉尔有限公司 | The sonic probe of the side wall with step for flowmeter |
| CN109405902B (en) * | 2017-08-17 | 2021-06-04 | 兰吉尔有限公司 | Acoustic probe mounted in measuring tube of flowmeter |
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| Publication number | Publication date |
|---|---|
| CN106052781B (en) | 2019-03-08 |
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Granted publication date: 20190308 |