CN206038093U - Liquid level measurement device of wide range high accuracy - Google Patents
Liquid level measurement device of wide range high accuracy Download PDFInfo
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- CN206038093U CN206038093U CN201620773436.9U CN201620773436U CN206038093U CN 206038093 U CN206038093 U CN 206038093U CN 201620773436 U CN201620773436 U CN 201620773436U CN 206038093 U CN206038093 U CN 206038093U
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Abstract
The utility model relates to a liquid level measurement device of wide range high accuracy, the liquid level measurement device owns including a plurality of cascade connection 's measuring unit measuring unit establish ties in a transmission fiber, two are adjacent measuring unit can not stretch the mechanism through the flexibility and connect, measuring unit is including base member, the sensitive elastic element of pressure and optic fibre type elasticity sensing element, optic fibre type elasticity sensing element couple in among the transmission fiber, optic fibre type elasticity sensing element be fixed in the base member with between the sensitive elastic element of pressure, measuring unit is equipped with superpressure self preservation and protects the mechanism, the sensitive elastic element of pressure protects the mechanism with superpressure self preservation and links to each other. The utility model discloses a liquid level measurement device has the characteristics that the range is big, the precision is high.
Description
Technical field
This utility model is related to level measuring instrument, more particularly to optical fiber sensing technology is set with reference to superpressure structure self-shield
A kind of large range high precision liquid level emasuring device of meter.
Background technology
Optical fiber sensing technology is developed rapidly with the development of Fibre Optical Communication Technology in 20 century 70s, it
Be one kind with light wave as carrier, optical fiber is medium, perceives and transmit a kind of New Sensing Technology of extraneous measured signal.These
Fibre Optical Sensor can be divided three classes again according to sphere of action：Point sensor（Such as optical fiber micro-bending sensor, optical fiber Fabry-
Perot sensors, optical fiber Bragg grating sensor etc.）, integrator sensor（Such as optical fibre Michelson interferometer and optical fiber
Mach-Zehnder interferometers）, distributed sensor（As passed using stress, Temperature Distribution formula made by Brillouin scattering effect
Sensor）.Optical fiber sensor has the unrivaled advantage of other traditional electric transducers, mainly：Electromagnetism interference, corrosion resistant
Erosion, measurement range width, be easy to be multiplexed into net, miniaturization and maintenance cost it is low.
At present, optical fiber sensor has been widely used for oil storage tank, pipeline, the pressure of dykes and dams, liquid level, the measurement of temperature
In, generally using traditional electrical measurement method, this mode cardinal principle is that the pressure-sensing device of pressure-detecting device can be with
Tested pressure change and produce corresponding deformation, the change of correlative after pressure-sensing device deformation, can be caused（Resistance, electric capacity
Deng）, this change has signal conversion and amplifying circuit to be converted into electric signal output again, by detecting that associated electrical signals can just be obtained
Corresponding pressure value, then by increasing thermistor thermometer in sensor, can just be calculated its temperature value.
In inflammable and explosive oil storage tank context of detection, traditional electronic measuring method may produce electric discharge phenomena, so as to draw
Detonation is fried, and there is potential safety hazard, so as to meet the detection demand of petrochemical field, for other are such as the survey of dykes and dams and pipeline
Amount, as field working conditions are complicated and severe, traditional electronic metering equipment is highly susceptible to the impact of external environment, directly affects
Its certainty of measurement.Meanwhile, conditional electronic measuring apparatus transmit electricity and output signal using cable, required number of cable compared with
Greatly, and cannot be planted embedment building structure inside, so in terms of long-term real-time monitoring is realized have significant limitation.Together
When, for traditional liquid level emasuring device, its measurement error can add up with the increase of range, for accurate measurement is present very
Big restriction.
The content of the invention
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, there is provided a kind of liquid level of large range high precision
Measurement apparatus.Liquid level emasuring device of the present utility model is required to the temperature of the height and liquid for measuring liquid level, and requires
Measure big range, high precision, low cost and realize superpressure self-protection function.
In order to reach foregoing invention purpose, the technical solution of the utility model is as follows：
A kind of liquid level emasuring device of large range high precision, liquid level emasuring device include the measurement of multiple cascade Connections
Unit, all described measuring units are series in Transmission Fibers, and two adjacent measuring units pass through flexibility not
Mechanism's connection can be stretched, the measuring unit includes matrix, presser sensor flexible member and optical-fiber type elastic force sensing element, described
Optical-fiber type elastic force sensing element is series in the Transmission Fibers, the optical-fiber type elastic force sensing element be fixed on described matrix with
Between the presser sensor flexible member, the measuring unit is provided with superpressure self-shield mechanism, the presser sensor flexible member
Mechanism is connected with superpressure self-shield.
In a kind of liquid level emasuring device of large range high precision of the present utility model, described matrix includes base and upper
Shell, the upper casing are installed on the base, and the center of the base is provided with into pressure mouth, and described matrix bottom is entered to press mouth
Position is provided with the drainage screen, and the top center of the upper casing is provided with optical fiber lead-out structure.
In a kind of liquid level emasuring device of large range high precision of the present utility model, the superpressure self-shield mechanism includes
There are thin diameter tube, wide diameter tube and sealing-plug, the thin diameter tube is fixed on wide diameter tube, the thin diameter tube upper end and the presser sensor
Flexible member is connected, and the position of the enterprising pressure mouth of base is fixed in the lower end of the wide diameter tube, and the sealing-plug is located at the particle size
In pipe and hung on the presser sensor flexible member by cord.
In a kind of liquid level emasuring device of large range high precision of the present utility model, the optical-fiber type elastic force sensing element
It is fixed on the presser sensor flexible member by guide post.
In a kind of liquid level emasuring device of large range high precision of the present utility model, the optical-fiber type elastic force sensing element
Two ends be fixed on equal strength spring beam, described equal strength spring beam one end is fixed on presser sensor flexible member, another
End is fixed in described matrix by fixed mount.
In a kind of liquid level emasuring device of large range high precision of the present utility model, in the measuring unit, light is additionally provided with
Fine type temperature-sensing element (device), the optical-fiber type temperature-sensing element (device) are series at the biography with the optical-fiber type elastic force sensing element
Lose in fibre.
In a kind of liquid level emasuring device of large range high precision of the present utility model, the flexibility can not stretch mechanism and institute
State measuring unit to connect by fixing card.
In a kind of liquid level emasuring device of large range high precision of the present utility model, the presser sensor flexible member is
Diaphragm or be bellows or be bourdon tube.
In a kind of liquid level emasuring device of large range high precision of the present utility model, the upper casing and the base connect
Position is provided with sealing ring.
In a kind of liquid level emasuring device of large range high precision of the present utility model, described flexibility can not be stretched mechanism and is
A piece rope of weighing.
Had the following advantages based on above-mentioned technical proposal this utility model compared with prior art：
1. the liquid level emasuring device of large range high precision of the present utility model adopts optical-fiber type elastic force sensing element as biography
Sensor, which can effectively prevent electromagnetic interference, and easily form high-performance, the sensor array of low cost, have in engineer applied
There is huge market potential.
2. superpressure self-shield mechanism is installed in the liquid level emasuring device of large range high precision of the present utility model, which can
The interference of data between each measuring unit is prevented effectively, so as to improve the certainty of measurement of liquid level emasuring device.
Description of the drawings
Fig. 1 is a kind of overall structure diagram of the liquid level emasuring device of large range high precision of this utility model.
Fig. 2 is the structural representation of measuring unit in a kind of liquid level emasuring device of large range high precision of this utility model.
Fig. 3 is measuring unit structural representation of this utility model using equal strength amount scheme.
Specific embodiment
We combine accompanying drawing and specific enforcement example to do structural principle of the present utility model and concrete application below
Further instruction, but protection domain of the present utility model can not be limited with this.
Fig. 1 is looked at, Fig. 1 is that a kind of overall structure of liquid level emasuring device of large range high precision of this utility model is illustrated
Figure.It can be seen that liquid level emasuring device of the present utility model includes multiple measuring units 1 being vertically connected with, own
The cascade of measuring unit 1 is connected, and can not stretch mechanism 2 by flexibility between two adjacent measuring units 1 and be connected, and works as measurement
During liquid level, the liquid level emasuring device is put in liquid, the measuring unit 1 positioned at bottom can be placed in the lowermost end of liquid.
In liquid level emasuring device of the present utility model, described flexibility can not be stretched mechanism and be referred to that the part itself cannot be certainly
Oneself elongation, but when installing and using can arbitrarily bending deflection, increase operation convenience, once connect after the completion of length
Cannot extend once again, it is a rope of weighing that the flexibility being usually used can not stretch mechanism.We can be adjacent by changing two
The flexibility connected between measuring unit 1 can not stretch the length adjustment certainty of measurement of mechanism 2.When the liquid level for needing accurate measurement liquid
When, the relatively short liquid level emasuring device of mechanism 2 can not be stretched using flexibility between adjacent measurement 1.Flexibility can not stretch mechanism 2
The quantity of the measurement apparatus for being connected can be determined, liquid level emasuring device of the present utility model according to the height of measured liquid level
Level gauging height can reach 20 meters.
In this utility model, all of measuring unit is connected in series by Transmission Fibers, and Transmission Fibers are used for will
The metrical information of each measuring unit is exported on optical fibre interrogation instrument.
Fig. 2 is looked at, Fig. 2 is the knot of measuring unit 1 in a kind of liquid level emasuring device of large range high precision of this utility model
Structure schematic diagram.The structure composition of measuring unit 1 includes matrix, presser sensor flexible member 7, Transmission Fibers and optical-fiber type elastic force
Sensing element 12, optical-fiber type elastic force sensing element 12 are connected in transmission ray, and Transmission Fibers are connected with optical fibre interrogation instrument, are passed
Lose a fine part to be located in measuring unit 1, a part is located at outside measuring unit 1, and optical-fiber type elastic force sensing element 12 is connected on
In the Transmission Fibers inside measuring unit 1.Optical-fiber type elastic force sensing element 12 is fixed on matrix and presser sensor elasticity unit
Between part 7, superpressure self-shield mechanism 8, superpressure self-shield mechanism 8 and presser sensor flexible member 7 inside measuring unit 1, is additionally provided with
Internal connection.When liquid is measured, when measuring unit 1 is in different liquid levels, sensibility elasticity element produces different degrees of shape
Become, and drive the generation deformation of optical-fiber type elastic force sensing element 12, deformation quantity to export into optical fibre interrogation instrument by Transmission Fibers
The wavelength change in Transmission Fibers is drawn, and then show that liquid level-wavelength curve realizes the measurement of liquid level.Wherein presser sensor is elastic
Element 7 can be diaphragm, bellows or bourdon tube, cause diaphragm, bellows by entering to press mouth to produce pressure into the liquid of measuring unit 1
Or bourdon tube is deformed.Normally behave as raised diaphragm, bellows extension and bourdon tube torsional deflection.
The structure composition of matrix includes upper casing 9 and base 5.Upper casing 9 is arranged on base 5 and forms an accommodation space,
Sealing ring 6 is installed in upper casing 9 and 5 link position of base, being provided for of sealing ring 6 prevents testing liquid from entering in matrix.
The top center of upper casing 9 is provided with optical fiber lead-out structure 11, and optical fiber lead-out structure 11 is provided with sealing ring with upper casing or passes through
Fluid sealant adhesion, the tight ring set of Transmission Fibers is in optical fiber lead-out structure 11；The center of base 5 is provided with into pressure mouth, to be measured
From entering to press mouth position to enter in measuring unit 1, the bottom of base 5 enters to press the position of mouth to be provided with drainage screen 4 to liquid.Drainage screen 4
Can effectively prevent the impurity in testing liquid from blocking into pressure mouth or causing into inside measuring unit 1 presser sensor elasticity
The elasticity change of element 7, adjusts the drainage screen 4 for changing different model mesh, it is ensured that measurement according to the practical situation of testing liquid
The normal measurement of unit 1.
Optical-fiber type elastic force sensing element 12 is used for testing liquid liquid level, adopts the optical fiber can be with as measurement hydraulic sensing device
Prevent electromagnetic interference, and optical-fiber type elastic force sensing element 12 is corrosion-resistant, measurement range width, be easy to be multiplexed into net, be easy to it is small-sized
Change and maintenance cost is low.Optical-fiber type elastic force sensing element 12 is fixed on presser sensor flexible member 7 by guide post 3, is led
The top of presser sensor flexible member 7 is fixed on to bar 3.Guide post 3 is for the deformation of presser sensor flexible member 7 is delivered to
On optical-fiber type elastic force sensing element 12.Guide post 3 can be located at 7 deformation visibility point of presser sensor flexible member, improve light
The sensitivity of the fine measurement of type elastic force sensing element 12.
When optical-fiber type elastic force sensing element 12, when deformation quantity is larger, the numerical value for measuring can produce error.So presser sensor
Flexible member 7 presses mouth to be connected by a superpressure self-shield mechanism 8 with entering.Include in 8 structure of superpressure self-shield mechanism thin
Footpath pipe, wide diameter tube and sealing-plug, thin diameter tube are fixed on wide diameter tube and fixed position sealing, thin diameter tube upper end and presser sensor bullet
Property element 7 be connected, the position of the enterprising pressure mouth of base 5 is fixed in the lower end of the wide diameter tube, and sealing-plug hangs on pressure by cord
On power sensibility elasticity element 7, sealing-plug is located in wide diameter tube.When the deflection of presser sensor flexible member 7 is larger, pressure is quick
Sense flexible member 7 draws sealing-plug by cord and moves and block the mouth of pipe positioned at thin diameter tube, presser sensor flexible member 7 upwards
Further do not deform upon, and then make optical-fiber type elastic force sensing element 12 in a steady statue, reach superpressure self-shield work(
Energy.The setting of superpressure self-shield mechanism 8 makes not interfereing with each other between each measuring unit 1 in liquid level emasuring device.Superpressure self-insurance
Shield mechanism 8 can also protect presser sensor flexible member 7, prevent from causing presser sensor flexible member 7 to be damaged as pressure is excessive.
Superpressure self-shield machine when liquid level reaches certain height, in the measuring unit 1 that some are below in liquid level emasuring device
Structure 8 is automatically switched off, and the measuring unit 1 in top continues to carry out level gauging.
Testing liquid passes through to enter the space formed by superpressure self-shield mechanism 8 and presser sensor flexible member 7 into pressure mouth
Interior, presser sensor flexible member 7 produces deformation due to the pressure of liquid, and the deformation of presser sensor flexible member 7 is delivered to guiding
On bar 3, guide post 3 is moved or is twisted, and then perceived and incited somebody to action by the optical-fiber type elastic force sensing element 12 being fixed on guide post 3
The signal for measuring spreads out of, and drives optical-fiber type elastic force sensing element 12, optical fiber using the deformation of the generation of presser sensor flexible member 7
There is drift in the centre wavelength of type elastic force sensing element 12, and wavelength change is passed on optical fibre interrogation instrument by Transmission Fibers,
Liquid level-wavelength curve is drawn, the purpose of level gauging is reached.When liquid level residing for measuring unit 1 is deepened, presser sensor flexible member
Suffered by 7, pressure is bigger, and the deformation quantitative change of presser sensor flexible member 7 is big, while driving the sealing-plug in superpressure self-shield mechanism 8
Move to the thin diameter tube mouth of pipe；When pressure reaches to a certain degree, the sealing-plug blocking thin diameter tube mouth of pipe, and then realize superpressure self-insurance
Shield.
As a kind of improvement, optical-fiber type temperature-sensing element (device) 10, the sensitive unit of optical-fiber type elastic force in Transmission Fibers, is also associated with
Part 12 is used for measuring testing liquid temperature.Optical-fiber type temperature-sensing element (device) 10 is connected on transmission with optical-fiber type elastic force sensing element 12
On optical fiber.Optical-fiber type temperature-sensing element (device) 10 measures internal body temperature, and signal is passed to optical fibre interrogation by Transmission Fibers
Instrument measures its wavelength on surveying, you can obtain the change curve of temperature-wavelength.The setting of optical-fiber type temperature-sensing element (device) 10 can be real-time
The temperature of liquid is monitored, and 12 deformation quantity of optical-fiber type elastic force sensing element is excluded as deformation can make measurement more caused by temperature
Plus it is accurate.
Used as a kind of improvement, optical-fiber type elastic force sensing element 12 passes through equal strength spring beam 14 and fixed mount 13 is fixed on base
Between body and presser sensor flexible member 7.Fig. 3 is that this utility model is tied using the measuring unit 1 of 14 scheme of equal strength spring beam
Structure schematic diagram.Fixed mount 13 is fixed on the base 5 of matrix as shown in Figure 3, and equal strength spring beam 14 is solid by guide post 3
It is scheduled on presser sensor flexible member 7, the two ends of optical-fiber type elastic force sensing element 12 are fixed on equal strength spring beam 14.It is to be measured
Liquid passes through into pressure mouth to enter in the space formed by superpressure self-shield mechanism 8 and presser sensor flexible member 7, presser sensor bullet
Property element 7 due to liquid pressure produce deformation, presser sensor flexible member 7 drive guide post 3 move, equal strength spring beam 14
Deform upon, and then the optical-fiber type elastic force sensing element 12 for making to be fixed on equal strength spring beam 14 is deformed upon, optical-fiber type bullet
There is drift in the centre wavelength of force sensitive element 12, and wavelength change is passed on optical fibre interrogation instrument by Transmission Fibers, draw
Liquid level-wavelength curve reaches the purpose of level gauging.
A kind of liquid level emasuring device of large range high precision of the present utility model, is surveyed using the measuring unit of cascade Connection
The height of amount liquid level, and used exclusive superpressure self-shield mechanism so that it does not interfere with each other between each measuring unit, structure
Novel, certainty of measurement is high, range is big, and maximum can reach 25 meters, and sensing element adopts optical-fiber type, have liquid level emasuring device
Have that long-time stability are good, safety is high, electromagnetism interference, without electrical measurement, can monitor on-line for a long time the advantages of.
Claims (10)
1. a kind of liquid level emasuring device of large range high precision, it is characterised in that the liquid level emasuring device includes multiple cascades
The measuring unit of connection, all described measuring units are series in Transmission Fibers, two adjacent measuring units
Mechanism's connection can not be stretched by flexibility；It is quick that the measuring unit includes matrix, presser sensor flexible member and optical-fiber type elastic force
Sensing unit, the optical-fiber type elastic force sensing element are series in the Transmission Fibers, and the optical-fiber type elastic force sensing element is fixed
Between described matrix and the presser sensor flexible member, the measuring unit is provided with superpressure self-shield mechanism, the pressure
Sensibility elasticity element is connected with superpressure self-shield mechanism.
2. a kind of liquid level emasuring device of large range high precision according to claim 1, it is characterised in that described matrix bag
Base and upper casing is included, the upper casing is installed on the base, the center of the base is provided with into pressure mouth, described matrix
Bottom enters to press the position of mouth to be provided with drainage screen, and the top center of the upper casing is provided with optical fiber lead-out structure.
3. the liquid level emasuring device of a kind of large range high precision according to claim 1, it is characterised in that：The superpressure is certainly
Protection mechanism includes thin diameter tube, wide diameter tube and sealing-plug, and the thin diameter tube is fixed on wide diameter tube, the thin diameter tube upper end with
The presser sensor flexible member is connected, and the position of the enterprising pressure mouth of base, the sealing-plug are fixed in the lower end of the wide diameter tube
Hang in the wide diameter tube and by cord on the presser sensor flexible member.
4. a kind of liquid level emasuring device of large range high precision according to claim 1, it is characterised in that the optical-fiber type
Elastic force sensing element is fixed on the presser sensor flexible member by guide post.
5. a kind of liquid level emasuring device of large range high precision according to claim 1, it is characterised in that the optical-fiber type
The two ends of elastic force sensing element are fixed on equal strength spring beam, and described equal strength spring beam one end is fixed on presser sensor elasticity
On element, the other end is fixed in described matrix by fixed mount.
6. a kind of liquid level emasuring device of large range high precision according to claim 1, it is characterised in that the measurement list
Optical-fiber type temperature-sensing element (device) is additionally provided with unit, and the optical-fiber type temperature-sensing element (device) is equal with the optical-fiber type elastic force sensing element
It is series in the Transmission Fibers.
7. the liquid level emasuring device of a kind of large range high precision according to claim 1, it is characterised in that it is described it is flexible not
Mechanism can be stretched to be connected by fixing card with the measuring unit.
8. the liquid level emasuring device of a kind of large range high precision according to claim 1, it is characterised in that the pressure is quick
Sense flexible member or be diaphragm be bellows or be bourdon tube.
9. the liquid level emasuring device of a kind of large range high precision according to claim 2, it is characterised in that in the upper casing
Sealing ring is installed with the link position of base.
10. the liquid level emasuring device of a kind of large range high precision according to claim 1, it is characterised in that described is soft
Property can not stretch mechanism for a rope of weighing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620773436.9U CN206038093U (en) | 2016-07-22 | 2016-07-22 | Liquid level measurement device of wide range high accuracy |
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| CN201620773436.9U CN206038093U (en) | 2016-07-22 | 2016-07-22 | Liquid level measurement device of wide range high accuracy |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107153038A (en) * | 2017-06-08 | 2017-09-12 | 铁道第三勘察设计院集团有限公司 | Stratum osmotic coefficient quickly determines probe and its application method |
| CN107607066A (en) * | 2017-08-15 | 2018-01-19 | 上海波汇科技股份有限公司 | A kind of difference detecting method and system of underground space building inner product aqua region |
| CN108613714A (en) * | 2018-05-04 | 2018-10-02 | 吉林大学 | A kind of stainless steel tube coal level measurement device |
| CN108871492A (en) * | 2018-07-13 | 2018-11-23 | 贵阳博烁科技有限公司 | A kind of protective device |
| CN110375824A (en) * | 2019-08-22 | 2019-10-25 | 黑龙江大学 | Gas station's tank level and density sensor based on fiber grating |
| CN108613714B (en) * | 2018-05-04 | 2024-06-21 | 吉林大学 | Stainless steel pipe coal level measuring device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107153038A (en) * | 2017-06-08 | 2017-09-12 | 铁道第三勘察设计院集团有限公司 | Stratum osmotic coefficient quickly determines probe and its application method |
| CN107607066A (en) * | 2017-08-15 | 2018-01-19 | 上海波汇科技股份有限公司 | A kind of difference detecting method and system of underground space building inner product aqua region |
| CN107607066B (en) * | 2017-08-15 | 2020-01-03 | 上海波汇科技有限公司 | Differential detection method and system for ponding area in underground space building |
| CN108613714A (en) * | 2018-05-04 | 2018-10-02 | 吉林大学 | A kind of stainless steel tube coal level measurement device |
| CN108613714B (en) * | 2018-05-04 | 2024-06-21 | 吉林大学 | Stainless steel pipe coal level measuring device |
| CN108871492A (en) * | 2018-07-13 | 2018-11-23 | 贵阳博烁科技有限公司 | A kind of protective device |
| CN108871492B (en) * | 2018-07-13 | 2020-10-02 | 贵阳博烁科技有限公司 | Protective device |
| CN110375824A (en) * | 2019-08-22 | 2019-10-25 | 黑龙江大学 | Gas station's tank level and density sensor based on fiber grating |
| CN110375824B (en) * | 2019-08-22 | 2024-03-22 | 黑龙江大学 | Filling station storage tank liquid level and density sensor based on fiber bragg grating |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Room 103, Building 299 Zhongchen Road, Songjiang City, Shanghai, 20113 Patentee after: Shanghai Bohui Technology Co., Ltd. Address before: Room 203, 177 Bibo Road, Zhangjiang High-tech Park, Pudong New Area, Shanghai, 201203 Patentee before: Shanghai Bandweaver Technology Co., Ltd. |
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| CP03 | Change of name, title or address |