CN206038106U - Optic fibre engine oil level sensor - Google Patents
Optic fibre engine oil level sensor Download PDFInfo
- Publication number
- CN206038106U CN206038106U CN201620903313.2U CN201620903313U CN206038106U CN 206038106 U CN206038106 U CN 206038106U CN 201620903313 U CN201620903313 U CN 201620903313U CN 206038106 U CN206038106 U CN 206038106U
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- Prior art keywords
- optical fiber
- guide
- level sensor
- fuel level
- optic fibre
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Level Indicators Using A Float (AREA)
Abstract
Optic fibre engine oil level sensor includes: side luminous optical fiber 5, mounting flange 1's guide 4 and shelter from the dustcoat 2 of guide 4, its characterized in that: one section route that side luminous optical fiber 5 follows the axial direction of transmitting terminal 9 is as the initiating terminal, the step -by -step winding of spiral is on 4 barrels of guide, optic fibre is taken a percentage and is passed the radial hole in 4 bottoms of guide, position limiting clamp 6 through the setting of 4 inner chambers of guide, return to the initiating terminal direction, fix on the optic fibre receiving terminal of 1 inboard sealing connection board on the ring flange, 8 settings 10, as the optic fibre that is used for responding to the oil level altitude signal all the way, another way is used for compensation temperature to change the U -shaped compensated fiber 3 of factor, fix on above -mentioned optic fibre receiving terminal 10, the measurement of oil level is realized to two way optic fibre borrowed light signals.
Description
Technical field
This utility model is related to a kind of structure of aircraft optical fiber fuel level sensor, and the optical fiber fuel level sensor can meet aircraft
High intensity, high sealing, strongly disturbing complex environment, but be not limited only to be used in aircraft, it is possible to use in oil such as automobile, yachts
Position or level gauging.The different principle of loss intensity of the sensor using side emitting optical fiber in different medium realizes that oil mass is surveyed
Amount.
Background technology
In traditional oil-level measurement technology, direct-reading oil level indicator and ball float oil level indicator etc. belong to contact type measurement on the spot,
Although measuring method is simple, the shortcomings of there is measurement blind area and telecommunication cannot be carried out, it is difficult to adapt to modern measure technology
Development need.Other utilize sensor made by electrical principles, such as resistance pressure type fuel level sensor and capacitance difference pressure type oil level to pass
Sensor etc., due to using voltage or current signal, being not easy to wait hazardous environment, and the work of severe corrosive for inflammable and explosive
Environment.Fuel level sensor is divided into two kinds of oscillating rod type fuel-quantity transducer and vertical fuel-quantity transducer.Output analog signalses are all electricity
Resistance.Oscillating rod type fuel-quantity transducer is easy to damage when fluid jolts concussion, therefore is progressively replaced by vertical fuel-quantity transducer
Generation.Vertical fuel-quantity transducer is made up of magnet steel float, reed capsule, metalfilmresistor etc..While analog quantity is exported, always according to
Oil level is different, output switching signal.The range of fuel-quantity transducer is determined according to high in fuel tank.Electrical wiring mode has three kinds：It is defeated
Go out analog quantity, the one wire system of the earthing of casing；Output analog quantity, the earth-free double wire system of shell)；Output analog quantity, can be high-order
Report to the police and low alarm, the four-wire system of public negative pole.By working media：Gasoline, diesel oil, hydraulic oil, oil, liquid level sensor are divided into
Two classes：It is primary detecting element with slide potentiometer that one class is, it is to drive potentiometer by float, then detects its resistance with ohmmeter
Value, so as to reach the purpose for showing oil level, but after grease covers potentiometer, its resistance can change, and cause error too big,
Can not even use, make such tank sensor become life-span very short consumable accessory.Another kind of examined for basic with inductance coil
Survey element, it be with float drive inductance coil, change oscillating circuit concussion frequency, then by cymometer detect its frequency come
Determine oily (liquid) position.But its complex structure, debugging trouble, high cost are expensive, it is impossible to be widely used.Therefore, it is current
Using the fuel measuring system based on electric capacity fuel-quantity transducer more than aircraft oil measurement.Capacitance-type fuel quantity sensing of the prior art
Device compares traditional float type oil quantity sensor, and which obvious advantage is that and eliminates mechanical transmission mechanism, compact conformation, volume
Less, use time is longer, precision is increased substantially.The transducing part of Capacitor-type Fuel Quantity Sensor is a coaxial container,
Cause the change of capacitance between sensor housing and induction electrode after oil enters container.At present, the fuel measurement on aircraft
Technology is mainly based upon the fuel measuring system of capacitance type oil level sensor, and wherein U.S. Honeywell and PACKARD are in fuel oil
Larger achievement is achieved in terms of measuring system research.Although this fuel measuring system based on capacitance type oil level sensor exists
There is very big improvement in terms of certainty of measurement, reliability, safety and maintainability, but still without being fully solved its some intrinsic
Technical problem：Capacitance signal of the signal of capacitance type oil level sensor for pF levels, signal intensity are very weak, are not easy to collection.
Capacitance signal anti-electromagnetic interference capability is poor.Capacitance signal is in transmitting procedure, it is easy to by electromagnetic interference, especially
It is shortwave interference.
Fuel oil pollution (including water pollution) causes measuring system false-alarm.
The change of the fuel oil trade mark and fuel oil temperature etc., causes measuring system precise decreasing.
Due to the impact of distribution capacity, system installation calibration and calibration process difficulty.
Due to Fibre Optical Sensor good insulation preformance, explosion-proof, corrosion-resistant, water-tolerant and very compact biography can be made
Sensor, fibre optic liquid level sensor are that the loss difference using side emitting optical fiber in different medium realizes oil-level measurement, and adopt U
Shape compensated optical fiber is to the impact because of factors such as temperature changes to measurement result.Measure field is completely with out electricity, and while can increase
The safety zone of big measurement.
Utility model content
The purpose of this utility model is the weak point existed for above-mentioned prior art, there is provided a kind of stable performance, anti-
Interference performance is strong, do not receive electromagnetic interference, precision and sensitivity height, life-span length, is mainly used in the optical fiber oil level of aircraft oil-level measurement
Sensor.
To achieve these goals, a kind of optical fiber fuel level sensor that this utility model is provided, including：Side emitting optical fiber 5,
The guide 4 of mounting flange 1 and the outer housing 2 for blocking guide 4, it is characterised in that：Side emitting optical fiber 5 is along the axial direction side of transmitting terminal 9
To stretch footpath as initiating terminal, spiral stepping is wrapped on 4 cylinder of guide, fiber optic tap pass through 4 bottom radial hole of guide,
The position limiting clamp 6 arranged by 4 inner chamber of guide, is returned to initial extreme direction, is fixed on 1 inner seal connecting plate 8 of ring flange and arranges
Optical fiber receiving terminal 10 on, as being used for sensing the optical fiber of level height signal all the way, another road be used for compensates because
The U-shaped compensated optical fiber 3 of element, is fixed on above-mentioned optical fiber receiving terminal 10；Two-way optical fiber realizes the measurement of oil level using optical signal.
This utility model is had the advantages that compared to prior art.
Stable performance.This utility model is employed as the side emitting optical fiber 5 of induction structure sensing level height signal and hangs down
Directly connect firmly the guide 4 on ring flange 1 and block the outer housing 2 of guide 4, structural strength is high, good seal performance can meet aircraft
Deng the high intensity complex environment on equipment.
Strong antijamming capability.The initiating terminal of side emitting optical fiber 5 is extended to be spirally wound on by this utility model along transmitting terminal 9 leads
Cylinder 4 on, and through on the inside of 4 bottom of guide return optical fiber initiating terminal, connect firmly in being tightly connected on plate 8 on the inside of ring flange 1, shape
Into 10 juxtaposition of initiating terminal and receiving terminal of side emitting optical fiber 5, the electrical signal collection mode of traditional sensors is abandoned, adopted
The higher optical signal of anti-electromagnetic interference capability solves prior art capacitance signal anti-electromagnetic interference capability as collection signal
Difference, capacitance signal is in transmitting procedure, it is easy to by electromagnetic interference, the particularly problem of shortwave interference.
Precision and sensitivity are high.This utility model acts on light using assembling U-shaped compensated optical fiber 3 on plate 8 is being tightly connected
The launching light of fine initiating terminal and act on the light that receives of optical fiber receiving terminal 10 and plate is tightly connected by the ring flange 1
8 transmission.Optical fiber fuel level sensor carries out shading in outside outer housing of installing.Avoid impact of the natural light to sensor.It is used for all the way
The optical fiber of sensing level height signal is side emitting optical fiber 5, all the way for compensation because the changing factors such as temperature are to measurement result
Impact optical fiber be U-shaped compensated optical fiber 3, two-way optical fiber using light pass through side emitting optical fiber when in different medium loss it is different
Measuring principle is high to realize the measurement of oil level, precision and sensitivity.And the receiving terminal 10 for fixing optical fiber is installed on the inside of guide 4
Position limiting clamp also has the effect for limiting 10 fiber lengths of side emitting optical fiber receiving terminal, can improve the measurement of optical fiber fuel level sensor
Precision.
Life-span length.This utility model side emitting optical fiber is arranged on guide using helical structure, and on guide, process side lights
Optical fiber installs helicla flute.The transmitting radiant of side emitting optical fiber and U-shaped compensated optical fiber and the transmitting terminal 9 of optical fiber, receive light source with
Adopt between optical fiber receiving terminal 10 and be tightly connected plate connection.Side emitting optical fiber is on the outside of guide and on the inside of guide using positioning knot
Structure is fixed, and optical fiber fuel level sensor is all connected to close using side emitting optical fiber, the transmitting terminal 9 of U-shaped compensated optical fiber and receiving terminal 10
On envelope connecting plate, increase structural strength of the optical fiber on guide.Life-span is extended according to experiment results proved.The spiral shell of helical structure
A diameter of 28mm is revolved, pitch is 15mm.The transmitting terminal 9 of side emitting optical fiber forms helical structure along guide outer helical groove, the bottom of at
Through on the inside of guide, formation receiving terminal 10 is simultaneously arranged side by side with transmitting terminal 9 at end.
It is tightly connected during plate is adopted and connects light source with the structure of optical fiber for glass, glass is using the scheme peace inlayed or sinter
It is mounted on structural member.The light passed through in each glass can not be interfered.
This utility model is also particularly well suited for the measurement of physical quantity in the special environments such as petroleum chemical industry.
Description of the drawings
Concrete structure of the present utility model is given by below example and its accompanying drawing, but not therefore by this utility model
Among being limited in described scope of embodiments.
Fig. 1 is this utility model optical fiber fuel level sensor full sectional view.
Fig. 2 is this utility model side emitting optical fiber helical structure schematic diagram.
Fig. 3 is the front view that this utility model is tightly connected plate.
In figure：1 ring flange, 2 outer housings, 3U shape compensated optical fibers, 4 guides, 5 side emitting optical fibers, 6 position limiting clamps, 7 locating clips, 8 is close
Envelope connecting plate, 9 transmitting terminals, 10 receiving terminals, 11 transmitting terminals, 13 glass structures, 14 metal structures.
This utility model is further illustrated with reference to the accompanying drawings and examples, but therefore this utility model is not limited in
Among described scope of embodiments.
Specific embodiment
Refering to Fig. 1, Fig. 2.In embodiment described below, optical fiber fuel level sensor, including：Side emitting optical fiber 5, connection method
The guide 4 of blue disk 1 and the outer housing 2 for blocking guide 4.Stretch footpath conduct of the side emitting optical fiber 5 along the axial direction of transmitting terminal 9
Initiating terminal, spiral stepping are wrapped on 4 cylinder of guide, and fiber optic tap passes through 4 bottom radial hole of guide, is set by 4 inner chamber of guide
The position limiting clamp 6 put, returns to initial extreme direction, is fixed on the optical fiber receiving terminal 10 of the setting of 1 inner seal connecting plate of ring flange 8
On, as all the way, for sensing the optical fiber of level height signal, another road is used for the U-shaped compensated optical fiber of compensates factor
3, it is fixed on above-mentioned optical fiber receiving terminal 10；Two-way optical fiber realizes the measurement of oil level using optical signal.
Act on optical fiber initiating terminal launching light and act on optical fiber receiving terminal 10 receive light by installed in flange
The plate 8 that is tightly connected on disk 1 is transmitted.
Ring flange 1 is to fix optical fiber fuel level sensor and install transmitting radiant and receive the device of return light.
For the oil mass signal in more accurate survey aircraft fuel tank, optical fiber fuel level sensor is realized using two-way optical fiber, one
It is that optical fiber is side emitting optical fiber 5 that road is used for sensing level height signal, all the way for compensation because the changing factors such as temperature are to measurement
The U-shaped compensated optical fiber 3 of impact as a result.Side emitting optical fiber, the transmitting terminal 9 of U-shaped compensated optical fiber and receiving terminal 10 are all connected to close
On envelope connecting plate.
The a diameter of 20mm-28mm of 5 helical structure of side emitting optical fiber, pitch is 10-15mm.But it is not limited only to the data.
In helical structure screw diameter be 28mm, pitch be 15mm when, side emitting optical fiber loss intensity in media as well is most
Greatly, it is easy to improve the resolution and certainty of measurement of optical fiber fuel level sensor.
For guaranteeing the realization of 5 helical structure parameter of side emitting optical fiber, a diameter of 20mm-28mm on guide 4, is formed with, pitch is
10-15mm, the deep helical structure groove for R1.5.
It is that side emitting optical fiber 5 is fixed on into guide 4 and length of the side emitting optical fiber 5 inside guide 4 is limited, the luminous fibre in side
It is fixed using position limiting clamp 6 on the outside of guide, through on the inside of 4 bottom of guide, side emitting optical fiber 5 is arranged by 4 hole body of guide
Position limiting clamp 6 is fixed.
For increasing the intensity of the helical structure that side emitting optical fiber 5 is formed on guide 4, locating clip 7 is adopted inside guide
It is fixed, the locating clip 7 of fixed optical fiber is provided with 4 outer surface of guide, locating clip quantity is determined according to sensor length.Increasing
While structural strength, the length of side emitting optical fiber receiving terminal 10 is limited, it is to avoid because 10 length difference of receiving terminal causes light to pass through
Loss difference during receiving terminal 10 causes certainty of measurement to change.
Optical fiber fuel level sensor carries out shading in outside outer housing 2 of installing.Avoid impact of the natural light to sensor.
Refering to Fig. 3.For ensureing the air-tightness of sensor, it is to avoid fuel tanker oil leak, launch radiant and fibre optical transmission end 9
Between, receive to connect using being tightly connected plate 8 between light source and optical fiber receiving terminal 10, be tightly connected plate 8 installed in ring flange 1
On.It is tightly connected plate 8 to be arranged in metal structure 14 using the glass structure 13 inlayed or sinter, the quantity of glass structure is light
10 sum of fine transmitting terminal 9 and receiving terminal, and the light passed through in each glass can not interfere.
Claims (9)
1. a kind of optical fiber fuel level sensor, including side emitting optical fiber (5), the guide (4) of mounting flange (1) and blocks guide
(4) outer housing (2), it is characterised in that：Side emitting optical fiber (5) is along the stretch footpath of the axial direction of transmitting terminal (9) as starting
End, spiral stepping are wrapped on guide (4) cylinder, and fiber optic tap passes through guide (4) bottom radial hole, by guide (4) inner chamber
The position limiting clamp (6) of setting, returns to initial extreme direction, is fixed on the optical fiber that ring flange (1) inner seal connecting plate (8) arranges and connects
In receiving end (10), as all the way, for sensing the optical fiber of level height signal, another road is used for the U-shaped of compensates factor
Compensated optical fiber (3), is fixed on above-mentioned optical fiber receiving terminal (10)；Two-way optical fiber realizes the measurement of oil level using optical signal.
2. optical fiber fuel level sensor as claimed in claim 1, it is characterised in that：Act on launching light and the work of optical fiber initiating terminal
The light that receives for optical fiber receiving terminal (10) is transmitted by the plate (8) that is tightly connected on ring flange (1).
3. optical fiber fuel level sensor as claimed in claim 1, it is characterised in that：Ring flange (1) is to fix optical fiber oil level sensing
Device and installation are launched radiant and receive the device of return light.
4. optical fiber fuel level sensor as claimed in claim 1, it is characterised in that：Side emitting optical fiber (5) helical structure is a diameter of
20mm-28mm, pitch are 10-15mm.
5. optical fiber fuel level sensor as claimed in claim 1, it is characterised in that：Guide is formed with a diameter of 20mm- on (4)
28mm, pitch are 10-15mm, the deep helical structure groove for R1.5.
6. optical fiber fuel level sensor as claimed in claim 1, it is characterised in that：Through the luminous light in side on the inside of guide (4) bottom
Fine (5) are fixed by the axially arranged position limiting clamp (6) of guide (4) hole body and carry out length restriction.
7. optical fiber fuel level sensor as claimed in claim 1, it is characterised in that：Fixed light is provided with guide (4) outer surface
Fine locating clip (7), locating clip quantity are determined according to sensor length.
8. optical fiber fuel level sensor as claimed in claim 1, it is characterised in that：It is tightly connected plate (8) and adopts and inlays or sinter
Glass structure be arranged in metal structure, the quantity of glass structure is fibre optical transmission end (9) and receiving terminal sum, and each glass
In the light that passes through can not interfere.
9. optical fiber fuel level sensor as claimed in claim 1, it is characterised in that：Outer housing is installed on the outside of side emitting optical fiber (5)
(2) carry out shading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620903313.2U CN206038106U (en) | 2016-08-18 | 2016-08-18 | Optic fibre engine oil level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620903313.2U CN206038106U (en) | 2016-08-18 | 2016-08-18 | Optic fibre engine oil level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206038106U true CN206038106U (en) | 2017-03-22 |
Family
ID=58307117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620903313.2U Active CN206038106U (en) | 2016-08-18 | 2016-08-18 | Optic fibre engine oil level sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN206038106U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113280890A (en) * | 2021-06-01 | 2021-08-20 | 重庆理工大学 | Reflection type spiral optical fiber liquid level sensor |
-
2016
- 2016-08-18 CN CN201620903313.2U patent/CN206038106U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113280890A (en) * | 2021-06-01 | 2021-08-20 | 重庆理工大学 | Reflection type spiral optical fiber liquid level sensor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |