CN2506990Y - Optical fiber grating liquid level sensor - Google Patents
Optical fiber grating liquid level sensor Download PDFInfo
- Publication number
- CN2506990Y CN2506990Y CN 01265843 CN01265843U CN2506990Y CN 2506990 Y CN2506990 Y CN 2506990Y CN 01265843 CN01265843 CN 01265843 CN 01265843 U CN01265843 U CN 01265843U CN 2506990 Y CN2506990 Y CN 2506990Y
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- Prior art keywords
- liquid level
- level sensor
- fiber grating
- fibre
- liquid
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- 239000007788 liquid Substances 0.000 title claims abstract description 49
- 239000013307 optical fiber Substances 0.000 title claims description 17
- 239000000523 sample Substances 0.000 claims abstract description 24
- 239000000835 fiber Substances 0.000 claims abstract description 23
- 239000012530 fluid Substances 0.000 claims description 16
- 239000012858 resilient material Substances 0.000 claims description 7
- 238000001228 spectrum Methods 0.000 claims description 6
- 206010007247 Carbuncle Diseases 0.000 claims description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000012216 screening Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 3
- 239000002360 explosive Substances 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 239000010720 hydraulic oil Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 208000003443 Unconsciousness Diseases 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The fiber grating liquid level sensor includes one protecting sheet with through hole in the upper end of the casing, one outer stress sheet set inside the liquid cavity of the casing, one fiber probe set below the liquid cavity, one liquid inside the liquid cavity, and one signal processor connected to the fiber probe. The method has the advantages of high measurement precision, large dynamic range, good linear relation, good reliability, strong anti-electromagnetic interference and the like. The liquid level sensor can be used as a liquid level sensor of common liquid, a liquid level sensor of flammable and explosive liquid and a liquid level sensor of strong corrosive liquid.
Description
The utility model belongs to the field of measuring technique of volume, flow, mass rate or liquid level, is specifically related to rely on light, electricity or fluid method and the liquid level indicator that passes through gaging pressure of the indication of turning round.
The liquid level sensor majority that uses in life and production is according to the electrical principles design at present, and its kind has resistance pressure type liquid level sensor and capacitor type liquid level sensor.The extra-stress that the resistance pressure type liquid level sensor does not sternly cause because of encapsulation has influence on the sensing accuracy of this sensor, and the force sensing resistance of selecting for use in its structure varies with temperature and is the exponential relationship variation, has reduced the precision of this liquid level sensor widely.The capacitor type liquid level sensor is subjected to stray capacitance influences big, makes the measuring accuracy of instrument be subjected to very big influence.
The major defect of above-mentioned two types liquid level sensor is that precision is not high, and dynamic range is little, and can not can not be used as the liquid level sensor of deep-etching liquid as the liquid level sensor of flammable and combustible liquids.
The purpose of this utility model is to overcome the shortcoming of above-mentioned liquid level sensor, provides a kind of measuring accuracy height, dynamic range is big, linear relationship good, good reliability, anti-electromagnetic interference (EMI) strong, can be used as the fiber grating liquid level sensor of flammable and combustible liquids and deep-etching liquid.
For achieving the above object; the solution that the utility model adopts is: it comprises the over cap that is arranged on the processing of housing upper end or is manufactured with through hole, be arranged on the external carbuncle sheet on the fluid chamber in the housing, be arranged on fibre-optical probe under the fluid chamber, be arranged on the liquid in the fluid chamber, and it also comprises the signal processor that links to each other with fibre-optical probe by optical fiber.
Fibre-optical probe of the present utility model is: the internal stress sheet is provided with the fiber grating that joins or be connected as a single entity with optical fiber one end, and the other end of fiber grating is provided with light screening material, another termination signal processor of optical fiber.Signal processor of the present utility model is: fiber coupler is connected with wide frequency light source and plain edge edge wave filter with fibre-optical probe by optical fiber, and is arranged on the photoelectric commutator on the plain edge edge wave filter optical axis direction.
The internal stress sheet of fibre-optical probe of the present utility model is to be made by resilient material.
The resilient material that the utility model is made internal stress is the silicon resilient material.
Internal stress sheet diameter of the present utility model is that 5～20mm, thickness are 0.1～1mm.
The utility model is compared with the capacitor type liquid level sensor with the resistance pressure type liquid level sensor, has the measuring accuracy height, an advantage such as dynamic range is big, linear relationship good, good reliability, anti-electromagnetic interference (EMI) are strong.The liquid level sensor that can be used as general liquid also can be used as the liquid level sensor of flammable and combustible liquids, also can be used as the liquid level sensor of deep-etching liquid.
Fig. 1 is the structural representation of an embodiment of the utility model.
Fig. 2 is the A-A cut-open view of Fig. 1.
Fig. 3 is the fibre-optical probe structural representation of Fig. 1.
Below in conjunction with drawings and Examples the utility model is further described, but the utility model is not limited to these embodiment.
In Fig. 1～3, present embodiment is made of housing 1, over cap 2, external strain sheet 3, fibre-optical probe 4, hydraulic oil 5, blanking cover 6, optical fiber 7, protective jacket 12, anti-vibration sleeve 13, signal processor connection.Be processed with fluid chamber on the center in housing 1, be processed with closed chamber down, fluid chamber and closed chamber link, and stick with glue on the upper surface of closed chamber and are connected to fibre-optical probe 4, and fibre-optical probe 4 is kept apart fluid chamber and closed chamber.Be processed with two oil guiding holes on the anchor ring of the bottom of fluid chamber, blanking cover 6 is stamped in the lower end of oil guiding hole, and hydraulic oil 5 can join in the fluid chamber from oil guiding hole, after filling it up with hydraulic oil in the fluid chamber, blanking cover 6 can be covered the lower end at oil guiding hole.On the anchor ring of the upper end of fluid chamber; stick with glue and be connected to external carbuncle sheet 3; external carbuncle sheet 3 can be experienced the pressure of different depth liquid; on the upper surface of housing 1, be connected with over cap 2 with the screw threads for fastening connector; be drilled with through hole on the over cap 2, liquid can enter in the housing 1 through the through hole on the over cap 2 outside housing 1.
The fibre-optical probe 4 of present embodiment is to be connected by internal stress sheet 4-1, Fiber Bragg Grating 4-2, black black-out paint 4-3 to constitute, Fiber Bragg Grating 4-2 sticks with glue on the diametric(al) that is connected on internal stress sheet 4-1, internal stress sheet 4-1 makes with the silicon resilient material, internal stress sheet 4-1 is a disk, its diameter is 12mm, thickness 0.5mm, the end of Fiber Bragg Grating 4-2 scribbles black black-out paint 4-3, the other end and optical fiber 7 and is connected as a single entity, black black-out paint 4-3 is used to prevent unwanted light reflection, another termination signal processor of optical fiber 7.Be set with the protective jacket of making of stainless steel wire 12 in the outside of optical fiber 7, between optical fiber 7 and protective jacket 12, anti-vibration sleeve 13 be housed.
The signal processor of present embodiment is connected and composed by fiber coupler 8, wide spectrum light source 9, plain edge edge wave filter 10, photoelectric commutator 11.Fiber coupler 8 links to each other with wide spectrum light source 9 and plain edge edge wave filter 10 with fibre-optical probe 4 by optical fiber 7, and photoelectric commutator 11 is arranged on the optical axis direction of plain edge edge wave filter 10.Wide spectrum light source 9 provides wideband light source for fibre-optical probe 4, fibre-optical probe 4 reflexes to fiber coupler 8 with the light of wide spectrum light source 9, fiber coupler 8 separates reflected light and incident light, make reflected light enter light edge wave device 10, plain edge edge wave filter 10 is converted to the energy variation of exporting light with catoptrical wavelength variations, and photoelectric commutator 11 converts plain edge edge wave filter 10 reflection luminous energy to electric signal output.
The designer has provided second embodiment of the utility model.In the present embodiment, the diameter of the internal stress sheet 4-1 of fibre-optical probe 4 is that 5mm, thickness are 0.1mm, and the connecting relation of other parts and parts is identical with first embodiment.
The designer has provided the 3rd embodiment of the utility model.In the present embodiment, the diameter of the internal stress sheet 4-1 of fibre-optical probe 4 is that 20mm, thickness are 1mm, and the connecting relation of other parts and parts is identical with first embodiment.
The designer has provided the 4th embodiment of the utility model.In the present embodiment, the diameter of the internal stress sheet 4-1 of fibre-optical probe 4 is that 5mm, thickness are 1mm, and the connecting relation of other parts and parts is identical with first embodiment.
The designer has provided the 5th embodiment of the utility model.In the present embodiment, the diameter of the internal stress sheet 4-1 of fibre-optical probe 4 is that 20mm, thickness are 0.1mm, and the connecting relation of other parts and parts is identical with first embodiment.
Principle of work of the present utility model is as follows:
Liquid enters from the through hole of over cap 2; external carbuncle sheet 3 produces deformation under the effect of fluid pressure; fluid pressure is delivered on the internal stress sheet 4-1 through hydraulic oil 5 again; internal stress 4-1 sheet generation deformation; deformation takes place in the Fiber Bragg Grating 4-2 that is bonded on the internal stress sheet 4-1; the light that makes wide spectrum light source 9 is through fiber coupler 8; optical fiber 7 transmission; to Fiber Bragg Grating 4-2 back reflection; catoptrical wavelength is subjected to displacement; output to fiber coupler 8 through optical fiber 7; fiber coupler 8 separates reflected light and incident light; make reflected light enter boundary filter 10; boundary filter 10 is converted to the energy variation of exporting light with catoptrical wavelength variations, and photoelectric commutator 11 converts boundary filter 10 reflection luminous energy to electric signal output.
Claims (5)
1, a kind of fiber grating liquid level sensor; it is characterized in that: it comprises the over cap [2] that is arranged on housing [1] upper end processing or is manufactured with through hole, be arranged on external carbuncle sheet [3] on interior the fluid chamber of housing [1], be arranged on fibre-optical probe [4] under the fluid chamber, be arranged on the interior liquid of fluid chamber, and it also comprises the signal processor that links to each other with fibre-optical probe [4] by optical fiber [7].
2, according to the described fiber grating liquid level sensor of claim 1, it is characterized in that said fibre-optical probe [4] is: internal stress sheet [4-1] is provided with the fiber grating [4-2] that joins or be connected as a single entity with optical fiber [7] one ends, the other end of fiber grating [4-2] is provided with light screening material, another termination signal processor of optical fiber [7]; Said signal processor is: fiber coupler [8] is connected with wide spectrum light source [9] and plain edge edge wave filter [10] with fibre-optical probe [4] by optical fiber [7], and is arranged on the photoelectric commutator [11] on plain edge edge wave filter [10] optical axis direction.
3, according to the described fiber grating liquid level sensor of claim 2, it is characterized in that: the internal stress sheet [4-1] of said fibre-optical probe [4] is made by resilient material.
4, according to the described fiber grating liquid level sensor of claim 3, it is characterized in that: the said resilient material of making internal stress [4-1] is the silicon resilient material.
5, according to claim 2 or 3 or 4 described fiber grating liquid level sensors, it is characterized in that: the diameter of said internal stress sheet [4-1] is that 5～20mm, thickness are 0.1～1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01265843 CN2506990Y (en) | 2001-11-08 | 2001-11-08 | Optical fiber grating liquid level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01265843 CN2506990Y (en) | 2001-11-08 | 2001-11-08 | Optical fiber grating liquid level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2506990Y true CN2506990Y (en) | 2002-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01265843 Expired - Fee Related CN2506990Y (en) | 2001-11-08 | 2001-11-08 | Optical fiber grating liquid level sensor |
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| CN (1) | CN2506990Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100533086C (en) * | 2006-12-07 | 2009-08-26 | 中国科学院半导体研究所 | Optical fiber optical grating pressure sensor and its usage method |
| CN101793542A (en) * | 2010-03-16 | 2010-08-04 | 合肥工业大学 | High-sensitivity optical fiber grating liquid level/fluid pressure sensor |
| CN102297743A (en) * | 2011-05-26 | 2011-12-28 | 昆山市南粤敏通光电技术有限公司 | optical fibre pressure sensor |
| CN103411643A (en) * | 2013-07-26 | 2013-11-27 | 西北工业大学 | Optical fiber sensor and method for measuring multiple parameters of air compressor fluid |
| CN103776473A (en) * | 2014-01-17 | 2014-05-07 | 沈阳航空航天大学 | Aircraft fuel oil oil-amount measurement system based on fiber bragg grating sensor |
| CN106643972A (en) * | 2016-12-20 | 2017-05-10 | 北京交通发展研究院 | Method, device and equipment for obtaining liquid measuring parameters and measuring liquid |
| CN108332822A (en) * | 2018-02-27 | 2018-07-27 | 吉林大学 | For interfering water-level probe and system and method in formula optical fiber water level monitoring system |
-
2001
- 2001-11-08 CN CN 01265843 patent/CN2506990Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100533086C (en) * | 2006-12-07 | 2009-08-26 | 中国科学院半导体研究所 | Optical fiber optical grating pressure sensor and its usage method |
| CN101793542A (en) * | 2010-03-16 | 2010-08-04 | 合肥工业大学 | High-sensitivity optical fiber grating liquid level/fluid pressure sensor |
| CN101793542B (en) * | 2010-03-16 | 2013-01-02 | 合肥工业大学 | High-sensitivity optical fiber grating liquid level/fluid pressure sensor |
| CN102297743A (en) * | 2011-05-26 | 2011-12-28 | 昆山市南粤敏通光电技术有限公司 | optical fibre pressure sensor |
| CN103411643A (en) * | 2013-07-26 | 2013-11-27 | 西北工业大学 | Optical fiber sensor and method for measuring multiple parameters of air compressor fluid |
| CN103411643B (en) * | 2013-07-26 | 2016-09-07 | 西北工业大学 | Fibre Optical Sensor and measuring method for air compressor fluid measuring multiple parameters |
| CN103776473A (en) * | 2014-01-17 | 2014-05-07 | 沈阳航空航天大学 | Aircraft fuel oil oil-amount measurement system based on fiber bragg grating sensor |
| CN103776473B (en) * | 2014-01-17 | 2017-01-11 | 沈阳航空航天大学 | Aircraft fuel oil oil-amount measurement system based on fiber bragg grating sensor |
| CN106643972A (en) * | 2016-12-20 | 2017-05-10 | 北京交通发展研究院 | Method, device and equipment for obtaining liquid measuring parameters and measuring liquid |
| CN108332822A (en) * | 2018-02-27 | 2018-07-27 | 吉林大学 | For interfering water-level probe and system and method in formula optical fiber water level monitoring system |
| CN108332822B (en) * | 2018-02-27 | 2023-08-25 | 吉林大学 | Water level probe, system and method for interference type optical fiber water level monitoring system |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |