CN206038100U - Contact oil level [measuring] transmitter - Google Patents
Contact oil level [measuring] transmitter Download PDFInfo
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- CN206038100U CN206038100U CN201620901135.XU CN201620901135U CN206038100U CN 206038100 U CN206038100 U CN 206038100U CN 201620901135 U CN201620901135 U CN 201620901135U CN 206038100 U CN206038100 U CN 206038100U
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- metal body
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- measurement
- oil
- temperature compensation
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Abstract
The utility model discloses a contact oil level [measuring] transmitter aims at providing a positioning accuracy height, can reduce parasitic capacitance value in the dry capacitance value to can change the fuel oil level measuring error who arouses by compensation temperature. The utility model discloses a following technical scheme realizes, outer metal body is as the shielding outer tube and the fixed supporting role of whole sensor, middle level metal body and output of inner layer metal body and the high proportional oil level altitude signal capacitance value C of immersion oil, and three metal bodys by three on the space equipartition, the pin radical location that upper and lower phase separates, the bottom is through guide arm and the coaxial temperature compensation module that is fixed with of aluminium tray, temperature compensation module passes through the aluminium tray and the guide arm is fixed in the bottom of metal body centre, pass through the guide arm output in the body with the capacitance value C of oil level height measurement module and temperature compensation module's resistance value R, be transformed into current signal IC and IR to fuel measurement control system with C and the proportional relation of R.
Description
Technical field
The utility model is related to a kind of contact oil for being mainly used in measuring aircraft fuel level height and fuel oil temperature
Position measuring transducer.
Background technology
Capacitance type oil level sensor be using be filled between positive and negative rapier liquid medium formation electric capacity as liquid level is linear
The variable quantity (i.e. the variable quantity of liquid level) of electric capacity is converted into the electric signal output of standard by change.Generally general condenser type oil
The transducing part of position measuring sensor is a coaxial container, after oil enters container causes sensor body and induction electrode
Between capacitance change, this variable quantity carries out linear and temperature-compensating by the conversion of temperature-compensation circuit, output 4～
20mA or 0～5V standard signals supply display instrument.As the analog elements such as the two-way switch and operational amplifier in circuit hold
It is vulnerable to the impact of operating ambient temperature change, causes the output of circuit to have larger temperature drift.Such temperature drift value
To measuring the impact of aircraft fuel level quality testing precision than larger, accordingly, it would be desirable to compensate to which.Ordinary circumstance is
The rule that the output voltage that capacitance measurement circuit is obtained by test is varied with temperature, enters trip temperature using singlechip technology to circuit
Compensate to reduce temperature drift.The capacitance type sensor of aircraft fuel level is measured in prior art, and Shortcomings are in
In：
(1) sensor does not have fuel oil temperature measurement part, therefore cannot compensate as fuel oil temperature changes and to fuel oil
The error that oil-level measurement brings.
(2) between sensor tube positioning mode typically using many concentric locating pin banks of spatial vertical into there is operation work
Skill is poor, the relatively low problem of setting accuracy.
(3) fuel oil pollution thing Jing is often deposited on and is installed on the sheath piece at sensor two ends, causes the capacitance of sensor
It is serious overproof, produce larger parasitic capacitance value.
(4) after the signal exit for being connected to sensor, no effective stress buffer is filled the cable in fuel tank
Put, in aircraft utilization environment, the lug plate or connecting ring of the swing pair of wire connection terminals connection of wire produce larger impulsive force,
It is easily caused connection to loosen.
Utility model content
The purpose of this utility model be for above-mentioned the deficiencies in the prior art in place of, there is provided a kind of concentric locating high precision,
Shatter-proof characteristic is strong, can reduce the parasitic capacitance value in the dry capacitance of sensor, and can the temperature change of compensated fuel cause
Fuel level measure error, in the contact oil-level measurement transmitter for structurally and functionally solving problem above.
The utility model solves the technical scheme adopted by its technical problem：A kind of contact oil-level measurement transmitter,
Including three level height measurement modules 4 for coaxially assembling the metal tube composition being integrated are measured with level height is fixed on
The temperature compensation module 9 of module bottom, it is characterised in that outer layer metal body 10 as whole sensor shielding outer tube and
Fixed supporting role, middle layer metal body 11 and inner layer metal body 12 export the level height signal highly proportional to immersion oil
Capacitance C, and three metal tubes by three it is spatially uniform be distributed, inner liner 13 that upper bottom is separated by, 15 and of outer liner
14 radial positioning of pin, bottom passes through guide rod 5 and aluminium pallet 7 is coaxially fixed with temperature compensation module 9, and temperature compensation module 9 is led to
Cross the bottom centre that aluminium pallet 7 and guide rod 5 are fixed on metal tube, connecting sleeve 16 is by the electricity of level height measurement module 4
Resistance value R of capacitance C and temperature compensation module 9 is exported by the guide rod 5 in body, will convert to electric capacity C and resistance value R into
The current signal I of proportionate relationshipCAnd IR, fuel oil measurement control system is transferred to by the socket (19) that shielded conductor (17) connects.
The utility model is had the advantages that compared to prior art：
Concentric locating high precision.Three metal tubes of the utility model are by three spatially uniform distributions, upper the next phase
Every inner liner 13,14 radial positioning of outer liner 15 and pin；Each three same sagittal plane uniformly the inner liner 13 of distribution,
Outer liner 15 and pin 14, assemble other two groups across a certain distance in phase vertically, and totally nine groups to guarantee the same of metal tube
Feel at ease dress.The coaxial temperature compensation module 9 on bottom passes through guide rod 5 and aluminium pallet 7 is fixed.Simple structure, concentric locating essence
Degree is high, and component positioning mode of the positioning mode using new construction between the pipe of sensor, manufacturability are good, can solve the problem that sensing in the past
The not high problem of device concentric locating precision.Without any movable or elastic component, impact resistance, high precision, stable performance；Installation side
Just, reliability height, maintenance are few, generally, it is not necessary to keeped in repair.Temperature compensation module 9 passes through aluminium pallet 7 and guide rod
5。
The parasitic capacitance value in the dry capacitance of sensor can be reduced.Temperature compensation module 9 is fixed on by the utility model
The centre bottom of metal tube, precisely compensates for the temperature drift for exporting, while using aluminium insert 8, two pipe bushings 3 and three
Concentric metal body is protected to temperature compensation module 9, while lightning protection can be played a part of, it is dirty so as to eliminate fuel oil
Dye impact of the thing to sensor effective capacitance value.Internal two metal tubes 11 and 12 measure level height signal, outermost layer gold
Category body 10 to shield external interference signal, and by capacitance C of level height measurement module 4 and temperature compensation module 9
Resistance value R exported by the guide rod 5 in body, be transformed into the current signal I of relation proportional to C and RCAnd IRSurvey to fuel oil
Amount control system, plays compensating action by temperature compensation module 9 to fuel level measure error, reduces the dry electric capacity of sensor
Parasitic capacitance value in value, can effectively measure the temperature change of fuel oil box, eliminate fuel medium because expanding with heat and contract with cold what is caused
Error.Sensor increases temperature compensation function, the error that amendment is brought due to temperature difference automatically.Through accurate temperature-compensating
With linear amendment, there is high accuracy, high stability and test constantly, directly by measuring fuel tank fuel quantity obtaining oil consumption
Value, does not cause any role and influence to oil piping system/pipeline.And measured value does not receive temperature, proportion and the container of fluid to be measured
Shape, pressure influence.Temperature compensation module adopts highly integrated special IC chip, through accurate temperature-compensating and linearly
Amendment, the standard of being converted into can be by the signal of the identifications such as computer, and capacitance level transducer has field calibration function, Yong Huke
Zero point is carried out, length, range is arbitrarily blocked and is calibrated automatically, to adapt to the application in various severe or complicated place.
Improve shatter-proof characteristic.Coaxial metal body composition level height measurement of the utility model with three mutually insulateds
Module 4, wherein outermost layer prevent external interference signal as shielded-plate tube, and internal two-layer pipe measures oil level signal, in the fixation of bottom
Coaxial temperature compensation module 9, by the change of medium in measurement sensor, obtains height and the oil mass of oil level, and implements temperature
Degree compensation and pour angle compensation, test result indicate that, can accurately with gamut linearization measurement and display, and anti-interference energy
Power is extremely strong, and the high-voltage spark for being resistant to 20,000 volts disturbs 30 seconds, frequency converter, high power radio station and other strong jamming equipment
To its measurement result.Vibration on aircraft be effectively prevent by being installed on two pipe bushings 3 and adjusting washer (disk) 1 at metal tube two ends
Under the conditions of three concentric metal bodys 10, produce between 11 and 12 it is moving axially relative.Guide rod 5 and inner metal tube body 12 it
Between adopt encapsulation process, while two pipe bushings 3 and aluminium insert 8 are opened circular hole using centre, can make in immersion sensor body
Fuel oil pollution thing flows out rapidly, it is therefore prevented that fuel oil pollution thing is deposited or blocking temperature measurement module, and output signal has certain
Damping time, the data fluctuations caused because vibrating, jolting can be eliminated.
The utility model is used for aircraft fuel oil Measurement and Control System, while having fuel level altitude signal to measure and fuel oil
Two functions such as temperature survey.Can be also used for the accurate measurement of the oil levels such as automotive oil tank, oil truck, railway locomotive, oil depot.Can
The oil levels such as gasoline, diesel oil, hydraulic oil are accurately measured installed in various occasions, it can also be used to high temperature oil-level measurement.
Description of the drawings
Fig. 1 the utility model contact oil-level measurement transmitter front views.
Fig. 2 is the use state reference view of Fig. 1.
Fig. 3 is temperature compensation module schematic diagram.
In figure：1 adjusting washer (disk), 2 screw standard parts, 3 liang of pipe bushings, 4 level height measurement modules, 5 guide rods, 6 insulation linings
Set, 7 aluminium pallets, 8 aluminium inserts, 9 temperature compensation modules, 10 outer layer metal bodys, 11 middle layer metal bodys, 12 inner layer metal pipes
Body, 13 inner liners, 14 pins, 15 outer liners, 16 connecting sleeves, 17 shielded conductors, 19 sockets, 20 containment vessels, 21 TEMPs
Device, 22 epoxy resin.
Specific embodiment
Further illustrate the utility model below in conjunction with the accompanying drawings with example, but the utility model is not limited in into institute therefore
Among the example ranges stated.
Referring to Fig. 1.The contact oil-level measurement transmitter that the utility model is provided, including one by three concentric metals
The level height measurement module 4 that body is constituted and the temperature compensation module 9 for being fixed on bottom.Level height measurement module 4 is by three
Root concentric metallic tube volume surrounding metal tube 10, middle layer metal body 11 and inner layer metal body 12 are configured to measure oil level height
Degree signal, three are coaxially assembled the metal tube composition level height measurement module being integrated, and wherein, outer layer metal body 10 is used
To shield external interference signal, shielding outer tube and fixed supporting role of the outer layer metal body 10 as whole sensor.In
Layer metal tube 11 and the measurement level height signal of inner layer metal body 12, export the level height letter highly proportional to immersion oil
Number capacitance C, causes the change of capacitance between sensor housing and induction electrode, this variable quantity to lead to after oil enters container
The conversion of 9 circuit of excess temperature compensating module simultaneously carries out accurate linear and temperature-compensating, and output 4-20mA standard signal supplies are aobvious
Show instrument.Middle layer metal body 11 between outer layer metal body 10 and inner layer metal body 12 pass through inner liner (13) and
The shielded conductor 17 that outer liner 15 is introduced in 12 body of inner layer metal body is connected firmly by the connecting sleeve 16 connected firmly on tube wall
On the inwall of middle layer metal body 11.
Outer layer metal body 10 wraps whole level height measurement module 4 and temperature compensation module 9.Temperature compensation module
Measurement signal is exported by 9 lower ends for being fixed on guide rod 5 by middle guide rod.Temperature compensation module 9 passes through aluminium pallet 7 and guide rod 5
It is fixed on the bottom centre of metal tube, connecting sleeve 16 is by capacitance C of level height measurement module 4 and temperature-compensating mould
Resistance value R of block 9 is exported by the guide rod 5 in body, is transformed into the current signal I of relation proportional to C and RCAnd IRTo fuel oil
Measurement and Control System.
Refering to Fig. 2.Contact oil-level measurement transmitter is arranged in fuel tank by mounting disc 18, peace loaded among fuel tank
Sabot 18 is fixed on outer layer metal body 10 by screw standard part 2, by the whole sensor definition being connected mobilizable
Within the scope of, in order to be arranged on fuel tank interface.Temperature compensation module 9 is in the lower end of sensor, and is submerged in fuel oil all the time
Among.
Refering to Fig. 3.The temperature compensation module 9 is by the temperature sensor 21 being assemblied in 20 body of containment vessel and constitutes,
The materials processing containment vessel 20 for selecting heat conductivility good, and epoxy resin 22 is smeared between temperature sensor 21 and containment vessel 20
Fix relative position.Temperature sensor select STT-R-A1-B2-C10-D1-E2F1G0H0-L1-PA-T1-W0-S0, can and
When response environment temperature change export corresponding resistance value.Temperature compensation module 9 can also be a kind of ideal for being suitable for and driving
Converter, the devices use linear regulator rises or falls output voltage to provide, thus with minimum output ripple,
Simultaneously can be by there are two kinds of feedback models of internal feedback and external feedback, and output voltage passes through resistance net under outside feedback model
Network is fed back and be may be programmed adjustment output voltage, is that temperature sensor has positive temperature coefficient, compensable temperature in piece
Effect chip.It can be made up of circuits such as boost converter, linear regulator, temperature sensor, feedback controllers, diode
Boost conversion is realized with an error amplifier, and according to input voltage and output voltage control system changing leading for switching tube
The logical and turn-off time, when the voltage time that error comparator detects linear modulator starts, electric current passes through inductance linear rise
To inductance peak point current, and internal switch shut-off at the end.
For ensureing that 4 relative axial position of level height measurement module is fixed, metal tube two ends are fixed with by screw mark
Adjusting washer (disk) 1 and two pipe bushings 3 that quasi- part 2 is connected firmly, tail end are equipped with aluminium insert 8.Aluminium insert 8 and two pipe bushings 3 are according to three
The immovable fitting of root concentric metal body, is that temperature compensation module 9 provides fixed space at, it is ensured that the accurate work of module.
For ensureing the fixation of the diametrically opposite position of level height measurement module 4, set on the metal tube of level height measurement module 4
Have and be distributed along metal tube, by inner liner between pipe body hole 13, outer liner 15 and pin 14.
For ensureing that the diametrically opposite position of guide rod 5 and temperature compensation module 9 is fixed, fix in 12 tail end of inner layer metal body
There is the insulating bushing 6 and aluminium pallet 7 connected firmly by screw standard part 2.
The working method of contact oil-level measurement transmitter is that two shielded conductors of temperature compensation module 9 pass through center
Guide rod 5 and socket 19 export the temperature signal R of real-time measurement to fuel oil measurement control system, connect middle layer metal body in the same manner
11 shielded conductor together will be real-time by socket 19 with the shielded conductor of connection inner layer metal body 12 by connecting sleeve 16
Level height signal capacitance values C of measurement are exported to fuel oil measurement control system, and both are transient measurement, by fuel measurement
Control system treatment temperature signal R and capacitance C, it is achieved thereby that to the accurate measurement of fuel level.
Claims (10)
1. a kind of contact oil-level measurement transmitter, including three oil levels for coaxially assembling the metal tube composition being integrated are high
Spend measurement module (4) and be fixed on the temperature compensation module (9) of level height measurement module bottom, outer layer metal body (10) is made
Shielding outer tube and fixed support for whole sensor, middle layer metal body (11) and inner layer metal body (12) output and leaching
Highly proportional level height signal capacitance values C of oil, it is characterised in that three metal tubes are by three spatially uniform point
Cloth, inner liner (13), outer liner (15) and pin (14) radial positioning that upper bottom is separated by, bottom pass through guide rod (5) and aluminium support
Disk (7) is coaxially fixed with temperature compensation module (9), and temperature compensation module (9) passes through aluminium pallet (7) and guide rod (5) is fixed on gold
The bottom centre of category body, temperature compensation module (9) is by capacitance C of level height measurement module (4) and temperature-compensating mould
Resistance value R of block (9) will convert to the electricity of relation proportional to electric capacity C and resistance value R by guide rod (5) output in body
Stream signal ICAnd IR, fuel oil measurement control system is transferred to by the socket (19) that shielded conductor (17) connects.
2. the contact oil-level measurement transmitter as described in claim 1, it is characterised in that positioned at outer layer metal body (10) with
Middle layer metal body (11) between inner layer metal body (12) passes through inner liner (13) and outer liner (15) introduces inner layer metal
Shielded conductor (17) in body (12) body is connected firmly in middle layer metal body by the connecting sleeve (16) connected firmly on tube wall
(11) on inwall.
3. the contact oil-level measurement transmitter as described in claim 1, it is characterised in that temperature compensation module (9) by
The temperature-sensitive module composition being assemblied in containment vessel body, the temperature compensation module (9) is fixed on the lower end of guide rod (5), by
Between guide rod (5) measurement signal is exported.
4. the contact oil-level measurement transmitter as described in claim 1, it is characterised in that for ensureing level height measurement module
Relative axial position is fixed, and metal tube two ends are fixed with the adjusting washer (disk) (1) and bushing connected firmly by screw standard part (2)
(3), tail end is equipped with aluminium insert (8).
5. the contact oil-level measurement transmitter as described in claim 4, it is characterised in that three concentric metal body two ends point
Other immovable fitting is located at the aluminium insert (8) on each end and two pipe bushings (3), is to fix at temperature compensation module (9) offer one
Space, it is ensured that the accurate work of module.
6. the contact oil-level measurement transmitter as described in claim 1, it is characterised in that for ensureing level height measurement module
(4) fixation of diametrically opposite position, is provided with the metal tube of level height measurement module (4) and is distributed along metal tube,
By the pin (14) that inner liner between pipe body hole (13), outer liner (15) are fixed.
7. the contact oil-level measurement transmitter as described in claim 1, it is characterised in that be to ensure guide rod (5) and temperature benefit
The diametrically opposite position for repaying module (9) is fixed, and is fixed with inner layer metal body (12) tail end and is connected firmly by screw standard part (2)
Insulating bushing (6) and aluminium pallet (7).
8. the contact oil-level measurement transmitter as described in claim 1, it is characterised in that outer layer metal body (10) is wrapped
Whole level height measurement module (4) and temperature compensation module (9).
9. the contact oil-level measurement transmitter as described in claim 1, it is characterised in that two of temperature compensation module (9)
Shielded conductor is exported the temperature signal of real-time measurement to fuel oil measurement control system by centre pilot (5) and socket (19).
10. the contact oil-level measurement transmitter as described in claim 1, it is characterised in that connection middle layer metal body (11)
Shielded conductor by connecting sleeve (16) with connection inner layer metal body (12) shielded conductor together by socket (19) general
The level height signal capacitance values of measurement are exported to fuel oil measurement control system in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620901135.XU CN206038100U (en) | 2016-08-18 | 2016-08-18 | Contact oil level [measuring] transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620901135.XU CN206038100U (en) | 2016-08-18 | 2016-08-18 | Contact oil level [measuring] transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206038100U true CN206038100U (en) | 2017-03-22 |
Family
ID=58307081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620901135.XU Active CN206038100U (en) | 2016-08-18 | 2016-08-18 | Contact oil level [measuring] transmitter |
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| Country | Link |
|---|---|
| CN (1) | CN206038100U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449489A (en) * | 2017-08-24 | 2017-12-08 | 浙江吉利汽车研究院有限公司 | A kind of fuel level sensor and oil level measuring device for vehicle |
-
2016
- 2016-08-18 CN CN201620901135.XU patent/CN206038100U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107449489A (en) * | 2017-08-24 | 2017-12-08 | 浙江吉利汽车研究院有限公司 | A kind of fuel level sensor and oil level measuring device for vehicle |
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| GR01 | Patent grant |