CN108120490A - Caravan water tank water-level detecting device and method - Google Patents
Caravan water tank water-level detecting device and method Download PDFInfo
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- CN108120490A CN108120490A CN201810027455.0A CN201810027455A CN108120490A CN 108120490 A CN108120490 A CN 108120490A CN 201810027455 A CN201810027455 A CN 201810027455A CN 108120490 A CN108120490 A CN 108120490A
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- optical fiber
- water tank
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- fiber
- reception optical
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 123
- 238000000034 method Methods 0.000 title claims abstract description 5
- 239000013307 optical fiber Substances 0.000 claims abstract description 62
- 239000000835 fiber Substances 0.000 claims abstract description 49
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 6
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 17
- 238000002474 experimental method Methods 0.000 claims description 12
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 210000000234 capsid Anatomy 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
- G01F23/292—Light, e.g. infrared or ultraviolet
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The present invention relates to vehicle component field more particularly to a kind of device for detecting water level of water tank and methods.A kind of caravan water tank water-level detecting device, including hollow housing and detection signal controller, it is axially disposed on hollow housing inner wall to have the launching fiber and reception optical fiber for being mutually parallel and having certain interval, the output terminal of detection signal controller is connected to launching fiber by light source, the input terminal of detection signal controller is connected by photoelectric conversion module with reception optical fiber, the exposed fiber core that launching fiber and reception optical fiber are removed for covering and coat.A kind of caravan water tank level testing methods, the reception optical fiber output power being converted to according to light source transmission power calculate to obtain water tank water surface elevation.Refraction variation of the present invention according to light in water and air, the variation transferred using light between a pair of of optical fiber, obtains the water level of water tank, it can be achieved that electrodeless continuous measurement water level, there is light weight, small and anti-interference, there are the advantages such as antivibration, anti-high and low-temp and antipollution object.
Description
Technical field
Patent of the present invention is related to vehicle component field more particularly to a kind of device for detecting water level of water tank and method.
Background technology
In prior art, caravan cistern water level sensor be mostly electric potential type water level sensor, float type water level sensor,
Dry-reed water level sensor and capacitance water level sensor etc..But electric potential type water level sensor is to have a grade water level sensor,
Cistern water level continuously cannot be accurately measured, and test point position is limited, if increasing point position, needs to increase volume, it is empty to occupy water tank
Between；Float type water level sensor by float with variation monitoring water level above and below liquid level, but caravan traveling during, such sensing
Device is easily tilted wobble effects by the water tank water surface, and particularly, pollutant is especially more in ash/Heisui River case, is easily blocked float and is disturbed it
Movement.In addition, when water tank freezes, float is squeezed fragile come off by ice, it is impossible to be worked normally；Dry-reed water level sensor leads to
Magnetic field of magnets effect on-off circuit is crossed, different resistance is matched and carries out level measurings, but has been similarly grade monitoring, and also has the float easy
What is be disturbed denounces.
For example, disclose a kind of claw type water level sensor in Chinese patent 20126418017.X, including sensor base,
Level electrode stick, pressing plate, conducting wire etc., it is simple in structure, it is easy to use, but cistern water level continuously cannot be accurately measured, test point position
It is limited, and electrode corrosion-vulnerable.For another example, 20112003436.8 dry reed type liquid level sensor of Chinese patent, including guide rod and freedom
Floating ball on guide rod etc. is sleeved on, sensors with auxiliary electrode is easily tilted wobble effects, the interference of floating ball vulnerable to pollution object, and water tank by the water surface
During icing, float is squeezed fragile come off by ice, it is impossible to be worked normally.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of caravan water tank water-level detecting device, the detection device root
According to refraction variation of the light in water and air, the variation transferred using light between a pair of of optical fiber obtains the water level of water tank, can be real
Existing electrodeless continuous measurement water level has the characteristics that light weight, small and anti-interference, with antivibration, anti-high and low-temp and anti-pollution
It contaminates the advantages such as object, without electric signal in water, meets caravan cistern water level on-line monitoring demand.
What the present invention was realized in：A kind of caravan water tank water-level detecting device, including hollow housing and detection signal
Controller, the hollow housing top are provided with sealing cover and gas vent, and hollow housing bottom offers limbers, hollow housing
It is axially disposed on inner wall to have the launching fiber and reception optical fiber for being mutually parallel and having certain interval, the detection signal controller
Output terminal launching fiber is connected to by light source, the input terminal of the detection signal controller is by photoelectric conversion module with connecing
It receives optical fiber to be connected, the exposed fiber core that the launching fiber and reception optical fiber are removed for covering with coat.
The launching fiber and the tail optical fiber of reception optical fiber are embedded in the inside of hollow housing, and are sealed with fluid sealant, ensure light
Light leak does not let out light for fine end.
The hollow housing is cylinder.
The hollow housing is spliced by two semicolumns, and circular arc is provided in the axial direction in the middle part of the semicolumn described in two
Shape slot, the launching fiber and reception optical fiber are each embedded in arc-shaped slot.
The sealing cover is the fastener containing internal and external threads, and internal thread is connected with hollow housing cooperation, external screw thread and room
Vehicle water tank excessively on detection hole cooperation be connected, to fix this water-level detecting device.
The bottom of the hollow housing is additionally provided with bottom end cover for fastening hollow housing.
The bottom end cover is the fillet of screw.
Sealing strip is additionally provided on the Mosaic face of semicolumn described in two.
A kind of caravan water tank level testing methods, the reception optical fiber output power being converted to according to light source transmission power
P0Water tank water surface elevation H, the water tank water surface elevation H and reception optical fiber output power P is calculated0Relational expression for formula 1,
（1）
In formula, P0For reception optical fiber output power, obtained after being converted by photoelectric conversion module；
RfFor the outer diameter of launching fiber/reception optical fiber；
K0Fiber coupling coefficient between launching fiber and reception optical fiber, is obtained by experiment；
DaFor the aerial emittance of ambient light of launching fiber, obtained by experiment；
D1For the ambient light emittance in water of launching fiber, obtained by experiment；
L is the length of launching fiber/reception optical fiber.
The output power P of the reception optical fiber0It is calculated by formula 2,
（2）
In formula, SpFor photodiode sensitivity in photoelectric conversion module；
V0To detect the output voltage of signal controller；
K1For proportionality constant, obtained by experiment.
Refraction variation of the caravan water tank water-level detecting device of the present invention according to light in water and air, utilizes a pair of of optical fiber
Between light transfer variation, obtain the water level of water tank, it can be achieved that electrodeless continuous measurement water level；Optical fiber is arranged in housing, is delayed
Error caused by water level rocks is solved, moreover it is possible to play a protective role when water tank freezes, by sealing strip cushioning effect, can protect
Water level sensor, in hot environment, also has structural thermal expansions certain inhibitory action, protects to greatest extent from ice extrusion damage
Water level sensor extends its service life；In addition, the present apparatus also has the characteristics that light weight, small and anti-interference, have anti-
It shakes, the advantages such as anti-high and low-temp and antipollution object, without electric signal in water, meets caravan cistern water level on-line monitoring demand.
Description of the drawings
Fig. 1 is the half-section diagram of caravan water tank water-level detecting device of the present invention；
Fig. 2 is the half-section diagram of the hollow housing of the present invention；
Fig. 3 is the structure diagram of sealing cover in the present invention.
In figure：1 hollow housing, 2 sealing covers, 3 gas vents, 4 limbers, 5 launching fibers, 6 reception optical fibers, 7 detection signals
Controller, 8 light sources, 9 photoelectric conversion modules, 10 sealing strips, 11 arc-shaped slots, 12 bottom end covers.
Specific embodiment
With reference to specific embodiment, the present invention is further explained.It is to be understood that these embodiments be merely to illustrate the present invention without
For limiting the scope of the invention.In addition, it should also be understood that, after the content of the invention stated has been read, those skilled in the art can
To be made various changes or modifications to the present invention, such equivalent forms equally fall within the model that the application the appended claims are limited
It encloses.
Embodiment 1
As shown in Figure 1, a kind of caravan water tank water-level detecting device, described including hollow housing 1 and detection signal controller 7
1 top of hollow housing is provided with sealing cover 2 and gas vent 3, and 1 bottom of hollow housing offers limbers 4,1 inner wall of hollow housing
It is above axially disposed to have the launching fiber 5 for being mutually parallel and having certain interval and reception optical fiber 6, the detection signal controller 7
Output terminal launching fiber 5 is connected to by light source 8, the input terminal of the detection signal controller 7 passes through photoelectric conversion module 9
It is connected with reception optical fiber 6, the exposed fiber core that the launching fiber 5 and reception optical fiber 6 are removed for covering with coat.
As shown in Fig. 2, in the present embodiment, the hollow housing 1 is cylinder；Preferably, the hollow housing 1 by
Two semicolumns are spliced, and arc-shaped slot 11,5 He of launching fiber are provided in the axial direction in the middle part of the semicolumn described in two
Reception optical fiber 6 is each embedded in arc-shaped slot 11.
In order to can guarantee the reliability of two semicylinder splicings, the bottom of the hollow housing 1 is additionally provided with bottom end cover
12, for fastening hollow housing 1, ensure that hollow housing 1 is not subject to crushing when freezing；In the present embodiment, it is preferably, described
Bottom end cover 12 is the fillet of screw.
In assembling, the launching fiber 5 and reception optical fiber 6 are fixed on left half cylinder shell by high-low temperature resistant glue respectively
In body and the arc-shaped slot of right half cylinder inner walls 11, ensure that launching fiber 5 and reception optical fiber 6 are arranged in parallel, by covering with
Coat is ground off, and two fiber core exposed parts are parallel opposite, to increase light loss between two optical fiber.It is special using optical fiber
Optical fiber coating is directly removed with wire stripper, physical operations is simple and practical, utilizes 40% hydrofluoric acid of concentration corrosion optical fiber removal bag
Layer；The tail optical fiber of the launching fiber 5 and reception optical fiber 6 is finally embedded in the inside of hollow housing 1, and is sealed with fluid sealant, is protected
Light leak does not let out light to card optical fiber end.After in detection hole of the present apparatus insertion fixed to water tank, housing can delay to a certain extent
Punching is rocked, and is that device monitors water level in the more steady water surface, is improved caravan cistern water level monitoring accuracy, the exhaust on 1 top of empty capsid
Hole 3 can guarantee that water level and water tank actual water level are contour in housing.
In the present embodiment, the light source 8 stablizes LED light source for high power, and for two optical fiber through sealing cover 2, use is close
Sealing packaged fiber draws port, ensures the leakproofness of device.
As shown in figure 3, the present invention can be further depicted as, the sealing cover 2 is the fastener containing internal and external threads, interior
The cooperation of screw thread and hollow housing 1 is connected, external screw thread and caravan water tank excessively on detection hole coordinate and be connected, examined to fix this water level
Device is surveyed, and is sealed simultaneously using sealing ring, prevents water leakage from spilling water tank.
In the present embodiment, sealing strip 10 is additionally provided on the Mosaic face of the semicolumn described in two, sealing strip 10 can
It plays a protective role when water tank freezes to housing, can also offset the thermal expansion of housing during the broiling summer, improve detection dress
The service life put.
A kind of caravan water tank level testing methods, the reception optical fiber output work being converted to according to 8 transmission power of light source
Rate P0Water tank water surface elevation H, the water tank water surface elevation H and reception optical fiber output power P is calculated0Relational expression be formula
1；The output power P of the reception optical fiber 60Relation with water tank water surface elevation H is formula 1,
（1）
In formula, P0For reception optical fiber output power, obtained after being converted by photoelectric conversion module；
RfFor the outer diameter of launching fiber/reception optical fiber；
K0Fiber coupling coefficient between launching fiber and reception optical fiber, is obtained by experiment；
DaFor the aerial emittance of ambient light of launching fiber, obtained by experiment；
D1For the ambient light emittance in water of launching fiber, obtained by experiment；
L is the length of launching fiber/reception optical fiber.
The output power P of the reception optical fiber0It is calculated by formula 2,
（2）
In formula, SpFor photodiode sensitivity in photoelectric conversion module；
V0To detect the output voltage of signal controller；
K1For proportionality constant, obtained by experiment.
It being connected as shown in Fig. 2, high power stablizes LED light source with launching fiber, incident light is propagated in launching fiber, due to
Optical fiber is naked core after being processed, and part light is gone out from side-scattered, and is entered by side surface coupling in reception optical fiber, and coupling light includes
Two parts, one for launching fiber scatter light coupled from air, secondly for launching fiber scattering light coupled from water and
Come.When water tank water surface height change can cause external agency refractive index to change, liquid-sky ratio changes in water tank, coupling
Power into reception optical fiber also changes correspondingly, and reception optical fiber is connected with photoelectric conversion module, after by detection signal controller 7
It is analyzed and processed and would know that Water in Water Tank face height.
Claims (10)
1. a kind of caravan water tank water-level detecting device, it is characterized in that：Including hollow housing (1) and signal controller (7) is detected,
Hollow housing (1) top is provided with sealing cover (2) and gas vent (3), and hollow housing (1) bottom offers limbers (4),
It is axially disposed on hollow housing (1) inner wall to have the launching fiber (5) for being mutually parallel and having certain interval and reception optical fiber (6),
The output terminal of the detection signal controller (7) is connected to launching fiber (5), the detection signal controller by light source (8)
(7) input terminal is connected by photoelectric conversion module (9) with reception optical fiber (6), the launching fiber (5) and reception optical fiber (6)
The exposed fiber core being removed for covering and coat.
2. caravan water tank water-level detecting device as described in claim 1, it is characterized in that：The launching fiber (5) and reception
The tail optical fiber of optical fiber (6) is embedded in the inside of hollow housing (1), and is sealed with fluid sealant, ensures that light leak does not let out light to optical fiber end.
3. caravan water tank water-level detecting device as claimed in claim 1 or 2, it is characterized in that：The hollow housing (1) is circle
Cylinder.
4. caravan water tank water-level detecting device as claimed in claim 3, it is characterized in that：The hollow housing (1) is by two
Semicolumn is spliced, and is provided in the axial direction with arc-shaped slot (11) in the middle part of semicolumn described in two, the launching fiber (5) and
Reception optical fiber (6) is each embedded in arc-shaped slot (11).
5. caravan water tank water-level detecting device as claimed in claim 3, it is characterized in that：The sealing cover (2) is containing interior
Externally threaded fastener, the cooperation of internal thread and hollow housing (1) are connected, external screw thread and caravan water tank excessively on detection hole cooperation phase
Even, to fix this water-level detecting device.
6. caravan water tank water-level detecting device as claimed in claim 3, it is characterized in that：The bottom of the hollow housing (1)
Bottom end cover (12) is additionally provided with for fastening hollow housing (1).
7. caravan water tank water-level detecting device as claimed in claim 6, it is characterized in that：The bottom end cover (12) is screw thread
Circle.
8. caravan water tank water-level detecting device as claimed in claim 6, it is characterized in that：The splicing of semicolumn described in two
Sealing strip (10) is additionally provided on face.
9. a kind of method for carrying out water level detecting with water-level detecting device using caravan water tank as described in claim 1, feature
It is：The reception optical fiber output power P being converted to according to light source (8) transmission power0Water tank water surface elevation H is calculated, it is described
Water tank water surface elevation H and reception optical fiber output power P0Relational expression for formula 1,
（1）
In formula, P0For reception optical fiber output power, obtained after being converted by photoelectric conversion module；
RfFor the outer diameter of launching fiber/reception optical fiber；
K0Fiber coupling coefficient between launching fiber and reception optical fiber, is obtained by experiment；
DaFor the aerial emittance of ambient light of launching fiber, obtained by experiment；
D1For the ambient light emittance in water of launching fiber, obtained by experiment；
L is the length of launching fiber/reception optical fiber.
10. caravan water tank level testing methods as claimed in claim 9, it is characterized in that：The output work of the reception optical fiber
Rate P0It is calculated by formula 2,
（2）
In formula, SpFor photodiode sensitivity in photoelectric conversion module；
V0To detect the output voltage of signal controller；
K1For proportionality constant, obtained by experiment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810027455.0A CN108120490A (en) | 2018-01-11 | 2018-01-11 | Caravan water tank water-level detecting device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810027455.0A CN108120490A (en) | 2018-01-11 | 2018-01-11 | Caravan water tank water-level detecting device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108120490A true CN108120490A (en) | 2018-06-05 |
Family
ID=62232928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810027455.0A Pending CN108120490A (en) | 2018-01-11 | 2018-01-11 | Caravan water tank water-level detecting device and method |
Country Status (1)
| Country | Link |
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| CN (1) | CN108120490A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87201239U (en) * | 1987-04-13 | 1987-12-02 | 顾震环 | Portable liquid-level gauge for ship |
| US7049622B1 (en) * | 2004-04-09 | 2006-05-23 | Sandia Corporation | Optical position sensor for determining the interface between a clear and an opaque fluid |
| CN201152770Y (en) * | 2007-10-06 | 2008-11-19 | 陈际军 | Liquid level sensor |
| CN101755193A (en) * | 2007-08-13 | 2010-06-23 | 波音公司 | Fiber optic fuel detection system |
| CN202974385U (en) * | 2012-12-13 | 2013-06-05 | 上海朝辉压力仪器有限公司 | Capacitance liquid level transmitter |
| CN105606068A (en) * | 2014-11-19 | 2016-05-25 | 波音公司 | Optical impedance modulation for fuel quantity measurement |
-
2018
- 2018-01-11 CN CN201810027455.0A patent/CN108120490A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87201239U (en) * | 1987-04-13 | 1987-12-02 | 顾震环 | Portable liquid-level gauge for ship |
| US7049622B1 (en) * | 2004-04-09 | 2006-05-23 | Sandia Corporation | Optical position sensor for determining the interface between a clear and an opaque fluid |
| CN101755193A (en) * | 2007-08-13 | 2010-06-23 | 波音公司 | Fiber optic fuel detection system |
| CN201152770Y (en) * | 2007-10-06 | 2008-11-19 | 陈际军 | Liquid level sensor |
| CN202974385U (en) * | 2012-12-13 | 2013-06-05 | 上海朝辉压力仪器有限公司 | Capacitance liquid level transmitter |
| CN105606068A (en) * | 2014-11-19 | 2016-05-25 | 波音公司 | Optical impedance modulation for fuel quantity measurement |
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Application publication date: 20180605 |