CN206056680U - The symmetrical damp type flow transducer of double-piston - Google Patents

The symmetrical damp type flow transducer of double-piston Download PDF

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Publication number
CN206056680U
CN206056680U CN201620504224.0U CN201620504224U CN206056680U CN 206056680 U CN206056680 U CN 206056680U CN 201620504224 U CN201620504224 U CN 201620504224U CN 206056680 U CN206056680 U CN 206056680U
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piston
laser arrays
fluid
fiber laser
piston cylinder
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钟丽琼
胡浩
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Guizhou University
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Guizhou University
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Abstract

This utility model provides a kind of double-piston symmetrical damp type flow transducer, sensor probe includes piston cylinder and detection case, closed by end cap respectively at the two ends of piston cylinder, dividing plate is provided with the middle part of piston cylinder, slide respectively and be provided with a piston in dividing plate both sides, spring is provided between piston and end cap, probe placement hole is offered on end cap, fiber laser arrays end is provided with probe placement hole, just to being provided with reflecting part at fiber laser arrays end on piston, two chambers between dividing plate and two pistons are connected with detection case by a fluid passage respectively, fluid passage and source of the gas are respectively arranged at opposite sides of the fluid in detection case internal flow path.To solve to adopt traditional dynamometry mode existing flow transducer, possessing the limitations such as certainty of measurement is not high, power consumption is big, in the problem that many occasions can not be competent at well more.This utility model belongs to field of flow detection.

Description

The symmetrical damp type flow transducer of double-piston
Technical field
This utility model is related to a kind of flow transducer, belongs to flow sensing monitoring technical field.
Background technology
Modern industry production especially, during automated production, is often required to various sensors monitor and control production During parameters, make equipment be operated in normal condition or optimum state, and make product reach best quality.Sensor Also such as commercial production, space development, marine exploration, environmental conservation, resource investigation, medical diagnosiss, biological work are penetrated into already The extremely general field of journey, even historical relic's protection etc..This utility model is one of sensor of numerous classifications --- flow is passed Sensor.With the development of sensor technology, occurred diversified flow transducer at present, it is the most frequently used have vane type, Eddy currents, toll bar vortex, hot wire type etc..But, the sensor such as vane type, eddy currents, toll bar vortex, hot wire type, Adopt traditional dynamometry mode more principle, possess the limitations such as certainty of measurement is not high, power consumption is big, can not be fine in many occasions It is competent on ground.
The content of the invention
The purpose of this utility model is:There is provided a kind of double-piston symmetrical damp type flow transducer, to solve existing stream Adopt traditional dynamometry mode more quantity sensor, possess the limitations such as certainty of measurement is not high, power consumption is big, can not in many occasions The problem being competent at well.
Scheme of the present utility model is as follows:A kind of symmetrical damp type flow transducer of double-piston, including sensor probe, light Electric transducer and signal processor, sensor probe include piston cylinder and being arranged at the detection case of piston cylinder side, piston cylinder Two ends are closed by end cap respectively, and the medium position of piston cylinder is provided with and for piston cylinder inner sealing to be divided into left and right two chambers Dividing plate, sliding to be provided between the end cap of a piston, piston and its side in the piston cylinder of dividing plate both sides respectively is respectively provided with The one end for having spring, spring is fixed on piston, and the other end is fixed on end cap, and probe is offered on the end cap at the two ends Placement hole, is provided with fiber laser arrays end in each probe placement hole, just to being provided with light-reflecting portion at fiber laser arrays end on piston Part, the fibre bundle at fiber laser arrays end are formed by incident optical and the output optical fiber set armouring, the output optical fiber at fiber laser arrays end with Optical-electrical converter is connected, and optical-electrical converter is connected with signal processor, can be sentenced by the change of the output optical fiber received signal The change of distance between disconnected reflecting part and fiber laser arrays end, so as to judge the pressure reduction of the fluid into piston both sides;
There is fluid intake and fluid issuing on detection case so that the inside of fluid stream case after testing, piston cylinder median septum with Two chambers between two pistons are connected with detection case by a fluid passage respectively, also including source of the gas, the confession of source of the gas The centre position of two fluid passages is pointed in gas direction, and fluid passage and source of the gas are respectively arranged at fluid and flow inside detection case The opposite sides of path, is arranged such, and when the fluid in detection case does not circulate, flows into the Fluid pressure of two side cavity of dividing plate Should be identical, then the sliding distance of two pistons is identical, and after working as flow of fluid, the Fluid pressure for flowing into two side cavity of dividing plate is Different, then the sliding distance of two pistons is different, and this pressure change will be reflected in the optical signal of fibre-optical probe detection and become In change, i.e., the information such as fluid flow are detected by the sensor.
The jet direction of source of the gas is perpendicular with the circulating direction of fluid in detection case.
Light source, Y types bonder and optical fiber are included also, light source is arranged at one end of optical fiber to be used to produce fiber-optic signal, light The fine other end is divided into detection fiber and reference optical fiber, the combination of above-mentioned light source, Y types bonder and optical fiber Jing after Y type bonders Two groups are had, the detection fiber in two groups of combinations thereofs accesses the fiber laser arrays end at sensor probe two ends correspondingly, and Used as the incident optical at fiber laser arrays end, the reference optical fiber in two groups of combinations thereofs is individually connected with an opto-electronic conversion Device, and optical-electrical converter is connected with signal processor.The optical signal that light source sends is coupled in optical fiber, then by Y types Bonder is divided into two-way, and optical fiber reaches fiber laser arrays ends after testing all the way, is irradiated on reflecting part, reflected light after reflection Into reception optical fiber, being transferred to optical-electrical converter by reception optical fiber carries out opto-electronic conversion, then inputs a signal into signal processor and enter Row signal processing;Another road is transmitted directly to also enter into signal processing after optical-electrical converter carries out opto-electronic conversion Jing reference optical fiber Device carries out signal processing, and when the fluid of piston left and right sides detection intracavity has pressure differential, now both sides damping spring is pressed The length of contracting is different, and the axial displacement that piston is produced is also different.Therefore, sensor both sides fiber laser arrays end and reflecting part away from From will be unequal, so as to the output light signal strength of reception optical fiber in two fiber laser arrays ends, Jing opto-electronic conversion and signal Process the output valve size after calculating and can reflect that the pressure differential size of cavity fluid is detected in both sides;
In sensor probe, dividing plate is that integral type structure or bulkhead seal are fixed in piston cylinder with piston cylinder;
It is located at the chamber of dividing plate both sides, two fluids of two pistons, two springs and dividing plate both sides to lead in piston cylinder Road is symmetrical arranged both with respect to dividing plate, and drainage screen is provided with fluid passage.
To ensure the sensing effect of fibre-optical probe, detect more accurate, two probe placement holes are opened in place end cap Center position, two probe placement holes, two pistons and springs are coaxially disposed, the specification of two pistons and two springs And performance is identical, reflecting part is vertically arranged with fiber laser arrays end, and reflecting part is illuminator or reflecting piece, naturalness Under, the distance of the reflecting part corresponding to one of fiber laser arrays end to the fiber laser arrays end is arrived with another fiber laser arrays end The distance at another fiber laser arrays end is identical, is provided with piston packing between piston and the inwall of piston cylinder, to prevent from living The fluid of plug both sides penetrates into mutually;
It is additionally provided with light transmission piece between fiber laser arrays end and reflecting part, light transmission piece is sheet glass, light transmission piece may be contained within Two probe placement holes are located at the port on the inside of two end caps, and the port of placement hole of popping one's head in is set by light transmission piece closing Put.
Used as preferred structure, the fiber laser arrays end is tightened in probe placement hole, to ensure light by screw thread It is firm and accurate that fine probe is positioned;
The method that fluid flow is detected using the sensor, including:
If flowing without detected fluid in detection case, two two chambers formed between piston and dividing plate in piston cylinder Interior Fluid pressure is identical, and the sliding distance of two pistons is identical, and it is zero that fiber laser arrays end detects two chamber pressure reduction;If There is detected fluid to flow in detection case, start source of the gas and blow to form air-flow, then detected fluid occurs phase with air-flow in detection case Interaction so that the initial momentum of detected fluid and air-flow changes, fluid shifts in detection case, so that enter living The fluid-mixing of plug cylinder forms pressure difference in the both sides of dividing plate, and the skidding distance of high pressure side piston is big, therefore, high pressure side Fiber laser arrays end is in small distance with reflecting part, so as to the output valve size Jing after opto-electronic conversion and signal processing are calculated is Can reflect that the pressure differential size of cavity fluid is detected in both sides, resettle momentum pressure reduction mathematical model, reckoning draws fluid momentum;
The momentum pressure reduction mathematical model is as follows:Relation between analysis transmission amount and pressure reduction, if the speed of air-flow is Vs, The speed of detected fluid is V, wherein VsBe the air velocity emitted by source of the gas, be known quantity, piston two ends pressure difference with The momentum M of two fluidss/ M is relevant, wherein M be detected fluid momentum, MsFor air-flow momentum, respectively withWith V2It is directly proportional.
M=kV2
K is constant;
I.e.:
Then:
Wherein, k1For known quantity, so as to the value that can try to achieve 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 4.
The jet direction of source of the gas is perpendicular with the circulating direction of fluid in detection case.
Compared with prior art, major advantage is as follows for this utility model:Through structure design, theoretical research and experimental analysiss Understand, the sensor has less structure, higher degree of accuracy and reliability, well adapting to property and interchangeability etc., the biography Sensor can be suitably used for numerous fluid flow detection occasions, and photoelectric sensing principle is applied to field of flow detection, output signal Jing After opto-electronic conversion and signal processing are calculated, output valve will change at double, so as to improve detection sensitivity, with highly important Actual application value, the design and popularization to novel flow rate sensor serve great impetus.
Meanwhile, the differential pressure pick-up has pressure differential in two side liquids using piston cylinder operator as pressure detection device When, piston is translational motion, it is only necessary to can calculate fluid pressure differential according to the translational movement of piston, for the requirement of Fibre Optical Sensor It is lower, calculate and measure more simple, and piston structure is more stable, is difficult, by external interference, to be hardly damaged, service life is more For permanent so that the reliability of sensor, adaptability and interchangeability have compared with much progress, are suitable for use as the survey of fluid flow Amount;The intensity compensation principle of sensor is more simple, and practicality is higher.
Description of the drawings
Fig. 1 is the systematic schematic diagram of the sensor;
Fig. 2 is the sectional view of the sensor probe configuration;
Fig. 3 is detection principle diagram;
Fig. 4 is the relation of fluid momentum and piston both sides pressure difference.
Specific embodiment
It is to make the purpose of this utility model, technical scheme and advantage clearer, new to this practicality below with reference to accompanying drawings Type is described in further detail,
Embodiment:
Referring to figs. 1 to Fig. 4, the present embodiment provides a kind of double-piston symmetrical damp type flow transducer, including sensor is visited 1, optical-electrical converter 2 and signal processor 3, sensor probe 1 include piston cylinder 11 and are arranged at the inspection of 11 side of piston cylinder Measuring tank 12, the two ends of piston cylinder 11 are closed by end cap 13 respectively, and the medium position of piston cylinder 11 is provided with inside piston cylinder 11 Sealed separation is the dividing plate 14 of left and right two chambers, and dividing plate 14 and piston cylinder 11 are integral type structure, the piston of 14 both sides of dividing plate Slide to be provided between the end cap 13 of a piston 15, piston 15 and its side in cylinder 11 respectively and be provided with spring 16, bullet One end of spring 16 is fixed on piston 15, and the other end is fixed on end cap 13, offers probe on the end cap 13 at the two ends Placement hole 17, is provided with fiber laser arrays end 19 in each probe placement hole 17, just to setting at fiber laser arrays end 19 on piston 15 Reflecting part 18 is equipped with, light transmission piece 131 between fiber laser arrays end 19 and reflecting part 18, is additionally provided with, light transmission piece 131 is glass Piece, light transmission piece 131 may be contained within two probe placement holes 17 and be located at the port on the inside of two end caps 13, and placement hole 17 of popping one's head in Port arranged by the closing of light transmission piece 131, the fibre bundle at fiber laser arrays end 19 gathered by incident optical and the output optical fiber 191 Armouring is formed, and the output optical fiber 191 at fiber laser arrays end 19 is connected with optical-electrical converter 2, optical-electrical converter 2 and signal processor 3 It is connected, two of the 11 interior chamber for being located at 14 both sides of dividing plate of piston cylinder, two pistons, 15, two springs 16 and 14 both sides of dividing plate Fluid passage 123 is symmetrical arranged both with respect to dividing plate 14, and drainage screen 125, two probe placements are provided with fluid passage 123 Hole 17 is opened in the center position of place end cap 13, and two probe 17, two pistons 15 of placement hole and spring 16 are coaxial Arrange, the specification and performance of two pistons 15 and two springs 16 is identical, and reflecting part 18 is vertical with fiber laser arrays end 19 Arrange, reflecting part 18 is illuminator or reflecting piece, under naturalness, the fiber laser arrays end is arrived at one of fiber laser arrays end 19 The distance of the reflecting part 18 corresponding to 19 arrives the distance phase at another fiber laser arrays end 19 with another fiber laser arrays end 19 Together, piston packing 151 is provided between the inwall of piston 15 and piston cylinder 11.
There is fluid intake 121 and fluid issuing 122 on detection case 12 so that the inside of fluid stream case 12 after testing, piston Two chambers between 11 median septum 14 of cylinder and two pistons 15 are connected with detection case 12 by a fluid passage 123 respectively Logical, also including source of the gas 124, the centre position of two fluid passages 123, and fluid passage 123 are pointed in the supply direction of source of the gas 124 Opposite sides of the fluid in 12 internal flow path of detection case, jet direction and the inspection of source of the gas 124 are respectively arranged at source of the gas 124 In measuring tank 12, the circulating direction of fluid is perpendicular;
Light source 4 is arranged at one end of optical fiber 6 to be used to produce fiber-optic signal, and the other end of optical fiber 6 divides Jing after Y types bonder 5 For detection fiber 61 and reference optical fiber 62, the combination of above-mentioned light source 4, Y types bonder 5 and optical fiber 6 has two groups, two groups above-mentioned group Detection fiber 61 in conjunction accesses the fiber laser arrays end 19 at 1 two ends of sensor probe correspondingly, and as fiber laser arrays end 19 incident optical, the reference optical fiber 62 in two groups of combinations thereofs are individually connected with an optical-electrical converter 2, and photoelectricity turns Parallel operation 2 is connected with signal processor 3.
The method that fluid flow is detected using the sensor, including:
If flowing without detected fluid in detection case 12, formed between two pistons 15 and dividing plate 14 in piston cylinder 11 Fluid pressure in two chambers is identical, and the sliding distance of two pistons 15 is identical, and fiber laser arrays end 19 detects two chambers Chamber pressure difference is zero;If having detected fluid to flow in detection case 12, start the air blowing of source of the gas 124 and form air-flow, then detected fluid and gas Stream in detection case 12 occurs to interact so that the initial momentum of detected fluid and air-flow changes, and fluid is in detection case Shift in 12, so that the fluid-mixing into piston cylinder 11 forms pressure difference, high pressure side piston in the both sides of dividing plate 14 15 skidding distance is big, therefore, the fiber laser arrays end 19 of high pressure side is in small distance with reflecting part 18, so as to Jing photoelectricity Output valve size after conversion and signal processing are calculated can reflect that the pressure differential size of cavity fluid is detected in both sides, resettle dynamic Amount pressure reduction mathematical model, reckoning draw fluid momentum.

Claims (7)

1. the symmetrical damp type flow transducer of a kind of double-piston, it is characterised in that:Including sensor probe (1), optical-electrical converter (2) and signal processor (3), sensor probe (1) is including piston cylinder (11) and is arranged at the detection case of piston cylinder (11) side (12), the two ends of piston cylinder (11) are closed by end cap (13) respectively, and the medium position of piston cylinder (11) is provided with piston cylinder (11) inner sealing is divided into the dividing plate (14) of left and right two chambers, and being slided in the piston cylinder (11) of dividing plate (14) both sides respectively sets It is equipped between the end cap (13) of a piston (15), piston (15) and its side and is provided with spring (16), spring (16) One end is fixed on piston (15), and the other end is fixed on end cap (13), and probe peace is offered on the end cap 13 at the two ends Hole (17) is put, and fiber laser arrays end (19) is provided with each probe placement hole (17), just to fiber laser arrays end on piston (15) (19) place is provided with reflecting part (18), and the fibre bundle of fiber laser arrays end (19) is gathered by incident optical and the output optical fiber (191) Armouring is formed, and the output optical fiber (191) of fiber laser arrays end (19) is connected with optical-electrical converter (2), optical-electrical converter (2) and signal Processor (3) is connected;
There is fluid intake (121) and fluid issuing (122) on detection case (12) so that the inside of fluid stream case (12) after testing, Two chambers between piston cylinder (11) median septum (14) and two pistons (15) are respectively by a fluid passage (123) and inspection Measuring tank (12) is connected, and also including source of the gas (124), the centre of two fluid passages (123) is pointed in the supply direction of source of the gas (124) Position, and fluid passage (123) and source of the gas (124) are respectively arranged at fluid relative the two of detection case (12) internal flow path Side, the jet direction of source of the gas (124) are perpendicular with the circulating direction of the interior fluid of detection case (12).
2. the symmetrical damp type flow transducer of a kind of double-piston according to claim 1, it is characterised in that:Source of the gas (124) Jet direction is perpendicular with the circulating direction of the interior fluid of detection case (12).
3. the symmetrical damp type flow transducer of a kind of double-piston according to claim 1 or claim 2, it is characterised in that:Also include Light source (4), Y type bonders (5) and optical fiber (6), light source (4) is arranged at one end of optical fiber (6) to be used to produce fiber-optic signal, optical fiber (6) the other end is divided into detection fiber (61) and reference optical fiber (62), above-mentioned light source (4), the coupling of Y types Jing after Y type bonders (5) The combination of device (5) and optical fiber (6) has two groups, and the detection fiber (61) in two groups of combinations thereofs accesses sensor correspondingly The fiber laser arrays end (19) at probe (1) two ends, and as the incident optical of fiber laser arrays end (19), the ginseng in two groups of combinations thereofs Examine optical fiber (62) and be individually connected with an optical-electrical converter (2), and optical-electrical converter (2) with signal processor (3) phase Even.
4. the symmetrical damp type flow transducer of a kind of double-piston according to claim 1, it is characterised in that:Sensor probe (1), in, dividing plate (14) is that integral type structure or dividing plate (14) are sealingly fastened in piston cylinder (11) with piston cylinder (11).
5. the symmetrical damp type flow transducer of a kind of double-piston according to claim 1, it is characterised in that:In piston cylinder (11) Two fluids of chamber, two pistons (15), two springs (16) and dividing plate (14) both sides positioned at dividing plate (14) both sides lead to Road (123) is symmetrical arranged both with respect to dividing plate (14), and drainage screen (125) is provided with fluid passage 123.
6. the symmetrical damp type flow transducer of a kind of double-piston according to claim 1, it is characterised in that:Two probe placements Hole (17) is opened in the center position of place end cap (13), two probes placement hole (17), two pistons (15) and springs (16) be coaxially disposed, the specification and performance of two pistons (15) and two springs (16) is identical, reflecting part (18) with Fiber laser arrays end (19) is vertically arranged, and reflecting part (18) is illuminator or reflecting piece, under naturalness, one of optical fiber inspection The distance for surveying the reflecting part (18) corresponding to end (19) to the fiber laser arrays end (19) is arrived with another fiber laser arrays end (19) The distance at another fiber laser arrays end (19) is identical, is provided with piston seal between the inwall of piston (15) and piston cylinder (11) Circle (151).
7. the symmetrical damp type flow transducer of a kind of double-piston according to claim 1, it is characterised in that:Fiber laser arrays end (19) it is additionally provided with light transmission piece (131) and reflecting part 18 between, light transmission piece (131) is sheet glass, light transmission piece (131) is respectively provided with Pass through in port of two probes placement hole (17) on the inside of two end caps (13), and the port of placement hole (17) of popping one's head in Light transmission piece (131) closing is arranged.
CN201620504224.0U 2016-05-30 2016-05-30 The symmetrical damp type flow transducer of double-piston Active CN206056680U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105865544A (en) * 2016-05-30 2016-08-17 贵州大学 Double-piston symmetrical damping type flow sensor and detection method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105865544A (en) * 2016-05-30 2016-08-17 贵州大学 Double-piston symmetrical damping type flow sensor and detection method thereof
CN105865544B (en) * 2016-05-30 2019-03-12 贵州大学 The symmetrical damp type flow sensor of double-piston and its detection method

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