CN107101694A - Fuel-quantity transducer - Google Patents
Fuel-quantity transducer Download PDFInfo
- Publication number
- CN107101694A CN107101694A CN201710362223.6A CN201710362223A CN107101694A CN 107101694 A CN107101694 A CN 107101694A CN 201710362223 A CN201710362223 A CN 201710362223A CN 107101694 A CN107101694 A CN 107101694A
- Authority
- CN
- China
- Prior art keywords
- fuel
- quantity transducer
- battery lead
- electrode assemblie
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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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
- G01F23/26—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 variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—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 variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (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 provides a kind of fuel-quantity transducer, the fuel-quantity transducer includes electrode assemblie, the electrode assemblie includes electrode assemblie, the electrode assemblie includes two battery lead plates being parallel to each other, the apparent surface of two battery lead plates is equipped with the sheet metal at two intervals, and each sheet metal is triangular structure of right angle.The fuel-quantity transducer measurement accuracy of the present invention is high.
Description
Technical field
The present invention relates to fuel-quantity transducer technical field.
Background technology
Capacitor-type Fuel Quantity Sensor compares traditional float type oil quantity sensor in the prior art, eliminates mechanical transmissioning machine
Structure, compact conformation, small volume, use time are longer, precision is increased substantially, and the operation principle of capacitance type sensor is basis
Cylindrical shape capacitor principle is operated, and capacitor is made up of the concentric cylinder pole plate inner and outer electrodes of two insulation,
When the electrolyte that dielectric constant is e is filled between two, the capacitance between two cylinders is that L is two in C=2 π eL/lnD/d, formula
Cylinder overlaps the length of part；D is the diameter of outside electrode；D is the diameter of inner cylinder electrode；E is situated between normal for the electricity of intermediate medium
Number.D, d, e are basically unchanged in actually measurement, therefore measure the height that C may know that liquid level.
Current Capacitor-type Fuel Quantity Sensor by measuring cylinder between electric capacitance change come measure fluid to be measured height, and
During electric capacity measuring between cylinder, during due to being filled with the electrolyte of differing dielectric constant between two, capacitance is also different, deposits
In the shortcoming that reading is inaccurate, resolution ratio is low.
The content of the invention
The main object of the present invention is to provide a kind of fuel-quantity transducer, it is intended to improve the measurement accuracy of fuel-quantity transducer.
To achieve the above object, fuel-quantity transducer proposed by the present invention includes electrode assemblie, and the electrode assemblie includes phase
Mutual two parallel battery lead plates, the apparent surface of two battery lead plates is equipped with the sheet metals at two intervals, each sheet metal
It is triangular structure of right angle.
It is preferred that, the surface of each sheet metal is all covered with insulating part.
It is preferred that, the sheet metal is aluminium flake, and the thickness of the sheet metal is less than 0.1mm.
It is preferred that, the fuel-quantity transducer also includes end-cap assembly and the insulation for being connected to the electrode assemblie two ends
Component.
It is preferred that, the electrode assemblie also includes sleeve, and two battery lead plates are contained in the sleeve, the sleeve
Two ends be respectively accommodated in the end-cap assembly and the insulation assembly.
It is preferred that, the sleeve includes electromagnetic shielding sheath and is sheathed on the protective case of the electromagnetic shielding sheath.
It is preferred that, the end-cap assembly includes accommodating insulating trip, pcb board and sensor in end cap, the end cap, described
The two ends of sensor are connected with the insulating trip and the pcb board respectively, the insulating trip and the battery lead plate and the sleeve
Connection.
It is preferred that, the end-cap assembly also includes cover plate, and the cover plate is covered on the end cap away from the electrode assemblie
One end.
It is preferred that, the insulation assembly includes pile crown and is contained in the pad of the pile crown, and the pile crown is sheathed on described
The one end of protective case away from the end-cap assembly, the bottom wall of the pad is embedded with sensor cluster, the sensor cluster with
Two battery lead plate connections.
It is preferred that, the pile crown is provided with multiple first through hole, and the protective case is away from described end-cap assembly one end provided with many
Individual second through hole, the first through hole is connected with second through hole.
The fuel-quantity transducer of the present invention is by setting two battery lead plates being parallel to each other, and the apparent surface of two battery lead plates is equal
Provided with two separate sheet metals, each sheet metal is triangular structure of right angle.In measurement fuel-quantity transducer internal fuel
During height, level height is not influenceed by dielectric constant so that measurement result is more accurate.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art,
On the premise of not paying creative work, it can also obtain other attached according to the structure shown in these accompanying drawings
Figure.
Fig. 1 is the overall structure diagram of one embodiment of the invention fuel-quantity transducer；
Fig. 2 is the configuration schematic diagram of fuel-quantity transducer in Fig. 1；
Fig. 3 is the positive structure schematic of battery lead plate in Fig. 1；
Fig. 4 is cross-sectional view of the battery lead plate along A-A faces in Fig. 3；
Fig. 5 is another viewing angle constructions schematic diagram of fuel-quantity transducer in Fig. 1；
Fig. 6 is Fig. 5 cross-sectional view；
Fig. 7 is the structural representation of sleeve；
Fig. 8 is that the sleeve of fuel-quantity transducer in an embodiment is provided with the configuration schematic diagram of slot；
Fig. 9 is that the sleeve of fuel-quantity transducer in another embodiment is not provided with the configuration schematic diagram of slot；
Figure 10 is the structural representation of end-cap assembly in Fig. 9；
Figure 11 is the structural representation of insulation assembly in Fig. 9；
Figure 12 is the planar structure schematic diagram of a battery lead plate and level height.
Drawing reference numeral explanation：
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its
His embodiment, belongs to the scope of protection of the invention.
It is to be appreciated that institute is directional in the embodiment of the present invention indicates that (such as up, down, left, right, before and after ...) is only used
In explaining relative position relation, motion conditions under a certain particular pose (as shown in drawings) between each part etc., if should
When particular pose changes, then directionality indicates also correspondingly therewith to change.
In the present invention, unless otherwise clearly defined and limited, term " connection ", " fixation " etc. should be interpreted broadly,
For example, " fixation " can be fixedly connected or be detachably connected, or integrally；Can be mechanically connect or
Electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, can be the connection or two of two element internals
The interaction relationship of individual element, unless otherwise clear and definite restriction.For the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
In addition, in the present invention such as relating to the description of " first ", " second " etc. be only used for describe purpose, and it is not intended that
Indicate or imply its relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ",
At least one this feature can be expressed or be implicitly included to the feature of " second ".In addition, the technical side between each embodiment
Case can be combined with each other, but must can be implemented as basis with those of ordinary skill in the art, when the combination of technical scheme
It will be understood that the combination of this technical scheme is not present, also not in the guarantor of application claims when appearance is conflicting or can not realize
Within the scope of shield.
Fig. 1 to Figure 12 is refer to, the present invention proposes a kind of fuel-quantity transducer 100, and the fuel-quantity transducer 100 is mainly used in
Aerospace field, for measuring level height.
It refer in Fig. 1 to Fig. 3, one embodiment of the invention, the fuel-quantity transducer 100 includes electrode assemblie 20, the electricity
Pole component 20 includes two battery lead plates 21 being parallel to each other, and the apparent surfaces of two battery lead plates 21 is equipped with two intervals
Sheet metal 22, each sheet metal 22 is triangular structure of right angle.
It is arranged on specifically, the hypotenuse of two sheet metals 22 is opposing parallel on battery lead plate 21, the survey of the fuel-quantity transducer 100
Measure principle：When a certain item physical quantity changes, such as liquid level h of electrode plate suqare A, material dielectric constant r, material
Change, so as to cause the change of capacitance, as long as the value for measuring the electric capacity can just calculate the respective physical amount to be measured
Situation of change；In liquid level measurement, change as liquid level, be exactly based on the measurement of capacitance to reflect quilt
Survey liquid height.H as shown in figure 12 is measuring electrode length, and h is current level height, and ε 0 is the dielectric constant of air, and ε 1 is
The dielectric constant of fuel oil, S1, S2, S3, S4 are respectively polar plate area, and C1 is the electric capacity of left top triangle electrode, and C2 is right bottom triangle
The electric capacity of electrode.The formula of known plate capacitor is：
If the electric capacity of triangle pole plate when C0 is equal to 0 for level height, C1 is left top triangle electrode when level height is equal to h
Electric capacity, C2 is the electric capacity of right bottom triangle electrode when level height is equal to h, then
Above formula divided by following formula are obtained：
OrderThen
As can be seen from Figure 12：
S1=ah/2,
S2=Ah-ah/2,
A/h=A/H,
A=Ah/H,
In formula (1), H be measuring electrode length, it is known thatC1 and C2 are obtained by Acquisition Circuit, C0
Electric capacity when being zero oil level can be stored in Flash by collection, so as to calculate M, M/H is, it is known that present level can be calculated
h.In the derivation of the principle, dielectric constant is eliminated by computing, level height h is not influenceed by dielectric constant.So that
Obtain measurement result more accurate.
The fuel-quantity transducer of the present invention realizes level height not by setting two independent sheet metals 22 in battery lead plate 21
Influenceed by dielectric constant, measurement accuracy is high.
Fig. 4 is refer to, the surface of each sheet metal 22 is all covered with insulating part 23.Insulating part 23 be epoxy resin or other
Insulating materials, 21 insulating sheet materials of battery lead plate, structure causes battery lead plate 21 conductive and leakproof.
Further, in order that the total quality of fuel-quantity transducer 100 it is lighter, sheet metal 22 be aluminium flake, the sheet metal
Thickness be less than 0.1mm.
Fig. 5 is refer to, fuel-quantity transducer also includes the He of end-cap assembly 40 for being connected to the two ends of electrode assemblie 20
Insulation assembly 60.Two battery lead plates 21 are fixed between end-cap assembly 40 and insulation assembly 60.
Further, in order to which guard electrode plate 21 is from external interference, electrode assemblie 20 also includes sleeve 24, described in two
Battery lead plate 21 is contained in the sleeve 24, and the two ends of the sleeve 24 are respectively accommodated in the end-cap assembly 40 and the insulation
Component 60.
Fig. 6 is refer to, sleeve 24 includes electromagnetic shielding sheath 241 and is sheathed on the protection of the electromagnetic shielding sheath 241
Set 242.Traditional fuel-quantity transducer 100 only has protective case 242, and increase electromagnetic shielding sheath 241 is used to shield electromagnetic interference
Function.
Further, end-cap assembly 40 includes accommodating insulating trip 43, pcb board 44 in end cap 41, the end cap 41 and passed
Sensor 45, the two ends of the sensor 45 are connected with the insulating trip 43 and the pcb board 44 respectively, the insulating trip 43 and institute
State battery lead plate 21 and the sleeve 24 is connected.Further, end-cap assembly 40 also includes cover plate 42, and the cover plate 42 is covered on institute
State the one end of end cap 41 away from the electrode assemblie 20.The inside of end cap 41 (does not show provided with the plug being connected with pcb board 44 in figure
Go out), plug is connected with external detecting system, and wherein sensor 45 is temperature sensor, for detecting inside fuel-quantity transducer 100
Fuel oil temperature.Insulating trip 43 is used to insulate to battery lead plate 21 and sleeve 24.
Further, insulation assembly 60 includes pile crown 61 and is contained in the pad 62 of the pile crown 61,61 sets of the pile crown
Located at the one end of the protective case 242 away from the end-cap assembly 40, the bottom wall of the pad 62 is embedded with sensor cluster 63,
The sensor cluster 63 is connected with two battery lead plates 21.Protective case 242 connects away from described one end of insulation assembly 60 provided with shielding
First 80, shielded joint 80 is arranged and is threadedly connected to the one end of end cap 41 away from cover plate 42.The play positioning, insulation of pad 62 are made
With.Wherein sensor cluster 63 is temperature sensor, and the temperature for measuring fuel oil, correspondence finds the density of fuel oil, sensor
Component 63 is electrically connected with two battery lead plates 21.
Fig. 5 and Figure 11 are refer to, pile crown 61 is provided with multiple first through hole 611, and the protective case 242 is away from the end cap group
The one end of part 40 is provided with multiple second through hole 242a, and the first through hole 611 is connected with the second through hole 242a.Second through hole
Inside and the ft connection of fuel-quantity transducer 100 of the 242a with electrode assemblie 20, the second receiving portion 242a are provided with multiple threeways
The inside and the ft connection of fuel-quantity transducer 100 of hole 412a, third through-hole 412a with electrode assemblie 20.Led to by setting first
Hole 611, the second through hole 242a and third through-hole 412a, make the inside and outside formation pressure of fuel-quantity transducer 100, eliminate fuel oil and enter
Air drag when entering inside capacitance sensor, cause Aviation Fuel liquid level that fuel-quantity transducer 100 measures can not in real time with outside
The actual pasta in portion synchronously changes, and prevents test data untrue.
The fixed form of battery lead plate 21 has two kinds in the present invention.Fig. 7 is refer to, the first is provided with the inwall of sleeve 24
Two relative slots 25 are inserted at four slots 25, the two ends of each battery lead plate 21 respectively, then the two ends of sleeve 24 respectively with
End-cap assembly 40 and insulation assembly 60 are connected；Fig. 8 to Figure 10 is refer to, second is close to one end of battery lead plate 21 in end cap 41
Two mounting grooves 42 are set, two grooves 64 are set in insulation assembly 60, and the two ends of battery lead plate 21 are respectively accommodated in an installation
The groove 64 of groove 42 and one, the overall structure of fuel-quantity transducer 100 is more stablized, easy disassembly.
The fuel-quantity transducer 100 of the present invention is by using plate type electrode plate 21, and battery lead plate 21 sets separate metal
Piece 22 so that oil mass height is not influenceed by dielectric constant, and measurement accuracy is higher.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every at this
Under the inventive concept of invention, the equivalent structure transformation made using description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical fields in the scope of patent protection of the present invention.
Claims (10)
1. a kind of fuel-quantity transducer, it is characterised in that including electrode assemblie, the electrode assemblie includes two electricity being parallel to each other
Pole plate, the apparent surface of two battery lead plates is equipped with the sheet metal at two intervals, and each sheet metal is right angled triangle
Structure.
2. fuel-quantity transducer as claimed in claim 1, it is characterised in that the surface of each sheet metal is all covered with insulating part.
3. the fuel-quantity transducer as described in any one of claim 1 or 2, it is characterised in that the sheet metal is aluminium flake, the gold
The thickness for belonging to piece is less than 0.1mm.
4. fuel-quantity transducer as claimed in claim 1, it is characterised in that the fuel-quantity transducer also includes being connected to institute
State the end-cap assembly and insulation assembly at electrode assemblie two ends.
5. fuel-quantity transducer as claimed in claim 4, it is characterised in that the electrode assemblie also includes sleeve, described in two
Battery lead plate is contained in the sleeve, and the two ends of the sleeve are respectively accommodated in the end-cap assembly and the insulation assembly.
6. fuel-quantity transducer as claimed in claim 5, it is characterised in that the sleeve includes electromagnetic shielding sheath and is sheathed on
The protective case of the electromagnetic shielding sheath.
7. fuel-quantity transducer as claimed in claim 5, it is characterised in that the end-cap assembly is included in end cap, the end cap
Insulating trip, pcb board and sensor are accommodated, the two ends of the sensor are connected with the insulating trip and the pcb board respectively, institute
State insulating trip and the battery lead plate and the sleeve connection.
8. fuel-quantity transducer as claimed in claim 7, it is characterised in that the end-cap assembly also includes cover plate, the cover plate
It is covered on the one end of the end cap away from the electrode assemblie.
9. fuel-quantity transducer as claimed in claim 6, it is characterised in that the insulation assembly includes pile crown and is contained in described
The pad of pile crown, the pile crown is sheathed on the one end of the protective case away from the end-cap assembly, and the bottom wall of the pad is pre-buried
There is sensor cluster, the sensor cluster is connected with two battery lead plates.
10. fuel-quantity transducer as claimed in claim 9, it is characterised in that the pile crown is provided with multiple first through hole, the guarantor
Sheath is provided with multiple second through holes away from described end-cap assembly one end, and the first through hole is connected with second through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710362223.6A CN107101694A (en) | 2017-05-19 | 2017-05-19 | Fuel-quantity transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710362223.6A CN107101694A (en) | 2017-05-19 | 2017-05-19 | Fuel-quantity transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107101694A true CN107101694A (en) | 2017-08-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710362223.6A Pending CN107101694A (en) | 2017-05-19 | 2017-05-19 | Fuel-quantity transducer |
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| Country | Link |
|---|---|
| CN (1) | CN107101694A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101509800A (en) * | 2009-03-23 | 2009-08-19 | 江苏工业学院 | Method for simultaneously detecting double liquid levels of oil and water |
| US20120152005A1 (en) * | 2008-02-08 | 2012-06-21 | Pulstone Technologies, LLC | Method and apparatus for sensing levels of insoluble fluids |
| CN102980630A (en) * | 2012-11-26 | 2013-03-20 | 合肥邦立电子股份有限公司 | Intelligent digital capacitive liquid level sensor |
| CN105136245A (en) * | 2015-09-21 | 2015-12-09 | 中国石油大学(华东) | Triangular capacitive sensor and liquid level measuring system |
-
2017
- 2017-05-19 CN CN201710362223.6A patent/CN107101694A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120152005A1 (en) * | 2008-02-08 | 2012-06-21 | Pulstone Technologies, LLC | Method and apparatus for sensing levels of insoluble fluids |
| CN101509800A (en) * | 2009-03-23 | 2009-08-19 | 江苏工业学院 | Method for simultaneously detecting double liquid levels of oil and water |
| CN102980630A (en) * | 2012-11-26 | 2013-03-20 | 合肥邦立电子股份有限公司 | Intelligent digital capacitive liquid level sensor |
| CN105136245A (en) * | 2015-09-21 | 2015-12-09 | 中国石油大学(华东) | Triangular capacitive sensor and liquid level measuring system |
Non-Patent Citations (3)
| Title |
|---|
| 朱高中: "电容式传感器在液位测量中的应用研究", 《液压与气动》 * |
| 符欲梅 等: "微分法实现与介质无关的电容式液位测量", 《传感器与微系统》 * |
| 陈立甲: "《电磁场与电磁波》", 31 August 2016, 哈尔滨工业大学出版社 * |
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Application publication date: 20170829 |
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