CN103913207B - High-precision variable-scan oil level measurement sensor with matrix capacitor - Google Patents
High-precision variable-scan oil level measurement sensor with matrix capacitor Download PDFInfo
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- CN103913207B CN103913207B CN201410110575.9A CN201410110575A CN103913207B CN 103913207 B CN103913207 B CN 103913207B CN 201410110575 A CN201410110575 A CN 201410110575A CN 103913207 B CN103913207 B CN 103913207B
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Abstract
The invention provides a high-precision variable-scan oil level measurement sensor with a matrix capacitor and aims to solve the problems that the traditional oil level measurement sensor is low in precision and high in power consumption, has many mechanical parts, is troublesome to install and has large errors of measurement for different oils. The high-precision variable-scan oil level measurement sensor comprises an electrode pole, a signal processing device connected with the electrode pole, and an electrical box used for protecting the signal processing device. The electrode pole is connected with the electrical box through an electrode connector. The electrode pole comprises an inner electrode and an outer electrode. The inner electrode is connected with the outer electrode through an electrode support. The inner electrode comprises two or more metal plates and a support round bar; the metal plates are penetrated by the support round bar and are fixedly connected with the support round bar; each metal plate is provided with a lead; the leads are led out of the support round bar and used for the signal processing device to collect signals. The electrical box comprises a shell, an upper cover and a lower cover; the upper cover and the lower cover are arranged at the upper and lower ends of the shell; the upper and lower covers are fixedly connected with the shell.
Description
Technical field
The present invention relates to a kind of level measurement sensor, more particularly, to one kind are surveyed using the high-precision scanning oil level that becomes of grid capacitive
Quantity sensor, belongs to oil-level measurement field.
Background technology
At present, in oil-level measurement field, the product of different principle technology emerges in an endless stream, but all there is following lacking
Point：1, low precision, substantially 5% about.2, power consumption is big, and electric current is at tens milliamperes to more than 100 milliamperes.3, mechanical part is many,
There are mechanical vibration causes fault rate high.4, trouble is installed.5 it is impossible to the oil of the different oil product of identification causes the measurement of different oil products
Resultant error is big, such as No. 97 gasoline and No. 0 diesel oil.
Content of the invention
The present invention in view of the shortcomings of the prior art, provides one kind to pass using the high-precision scanning oil-level measurement that becomes of grid capacitive
Sensor, solves that traditional level measurement sensor precision is low, power consumption is big, mechanical part is many, installs trouble and for different oil products
The big problem of measurement error.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：One kind is surveyed using the high-precision scanning oil level that becomes of grid capacitive
Quantity sensor, the signal processing apparatus being connected with electrode stem including electrode stem and the electrical equipment for protection signal processing meanss
Box, described electrode stem is connected with described electrical appliance kit by electrode connecting parts, and described electrode stem includes inner and outer electrodes, institute
State interior electrode to be connected with described external electrode by an electrode supporting, described interior electrode include two or more sheet metals and
One support round rod, described sheet metal is passed through described support round rod and is fixedly connected with described support round rod, each metal described
Piece is provided with a lead, and described lead is drawn by support round rod, gathers signal for signal processing apparatus.
Further, it is provided with the distance of 0.1-1mm between described sheet metal.
Further, described electrical appliance kit includes housing, the upper lid being located at housing upper and lower ends and lower cover, described upper lid and institute
State lower cover to be fixedly connected with described housing.
Further, cover on described and be provided with signal display apparatus, described signal display apparatus are fixed on described
The one side of lid, and pass through described upper lid to be connected with described signal processing apparatus by wire.
Further, described housing lower end is provided with binding post.
Further, described binding post is water joint.
Further, it is provided with one between described electrode stem and described electrode connecting parts for fixing flange.
The invention has the beneficial effects as follows：The present invention using the level measurement sensor made of grid capacitive scanning technique,
Structure comprises electrical appliance kit, electrode stem, flange, circuit, sealing ring.The single electrode that wherein electrode stem discards tradition, using multi-electrode,
Using the method for scanning, integrated temperature height medium analysis are judged current oil level, are judged the height method ratio of liquid using segmentation
The method that single hop before analyzes liquid level improves in precision, and error reduces.Achieve high-precision measurement, also reduce simultaneously
Temperature drift；Using the principle measurement liquid level of electric capacity scanning, solve when the medium of liquid changes simultaneously, can automatically adapt to
The change of different medium, can adapt to the liquid of different medium.
Brief description
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the external structure schematic diagram of the present invention；
Fig. 3 is the structural representation of electrode in the present invention.
Wherein, 1, electrode stem；2nd, signal processing apparatus；3rd, electrical appliance kit；4th, interior electrode；5th, external electrode；6th, electrode supporting；7、
Sheet metal；8th, support round rod；9th, lead；10th, housing；11st, Shang Gai；12nd, lower cover；13rd, signal display apparatus；14th, flange；15、
Binding post；16th, electrode connecting parts.
Specific embodiment
Below in conjunction with accompanying drawing, the principle of the present invention and feature are described, example is served only for explaining the present invention, and
Non- for limiting the scope of the present invention.
One kind becomes scanning level measurement sensor using grid capacitive is high-precision, is connected with electrode stem 1 including electrode stem 1
Signal processing apparatus 2 and the electrical appliance kit 3 for protection signal processing meanss 2, described electrode stem 1 pass through electrode connecting parts 16 with
Described electrical appliance kit 3 is connected, and described electrode stem 1 includes interior electrode 4 and external electrode 5, and described interior electrode 4 passes through an electrode supporting
6 are connected with described external electrode 5, and described interior electrode 4 includes two or more sheet metals 7 and a support round rod 8, described gold
Belong to piece 7 to pass through described support round rod 8 and be fixedly connected with described support round rod 8, each sheet metal 7 described is provided with a lead
9, described lead 9 is drawn by support round rod 8, gathers signal for signal processing apparatus 2.
It is provided with the distance of 0.1-1mm between described sheet metal 7.
Described electrical appliance kit 3 includes housing 10, is located at the upper lid 11 of housing 10 upper and lower ends and lower cover 12, described upper lid 11 and
Described lower cover 12 is fixedly connected with described housing 10.
Described upper lid 11 is provided with signal display apparatus 13, and described signal display apparatus 13 are fixed on described upper lid 11
One side, and pass through described upper lid 11 to be connected with described signal processing apparatus 2 by wire.
Described housing 10 lower end is provided with binding post 15.
Described binding post 15 is water joint.
It is provided with one for fixing flange 14 between described electrode stem 1 and described electrode connecting parts.
Embodiments of the present invention are as follows：
Interior electrode 4 is made up of the sheet metal 7 of a support round rod 8 and N number of diverse location, sheet metal 7 length, material
Etc. identical.Sheet metal 7 is evenly distributed in above support round rod 8, the spacing between sheet metal 7 is 0.5 millimeter, each
Sheet metal 7 is drawn by a lead 9, gathers signal for signal processing apparatus 2.
If, the height of sheet metal 7 is
L1=L2............=LN,
The total height of so interior electrode 4
L is total=L1+L2+............+LN；
We assume that the aerial capacity of each section of sheet metal 7 is CxL, the capacity that liquid level floods in a liquid completely is
CxH, when measured medium is in the range of a certain section, its maximum variable quantity
Δx=CxH-CxL
Known a certain section of capacitance change Δ x, measures electric capacity Cx, length L of this section, then permissible according to change of scale
Obtain the height Lx of 7 immersion liquids of present segment sheet metal：
Lx=[L*（Cx-CxL）]/Δx;
According to above analytical calculation, obtain a certain section of sheet metal 7 by liquid-immersed height.
The height of known first paragraph is L1, and the height of second segment is L2, is followed successively by L3, L4 ... ... LN.
If during liquid-immersed first paragraph, the height of first paragraph is L1x, and during submergence second segment, the height of second segment is
L2x, during the 3rd section of submergence, the 3rd section of height is L3x, is followed successively by L4x ... LNx.
Known when first paragraph by liquid-immersed when, when other sections are air, it is total to obtain L,
L is total=L1x;
When second segment by liquid-immersed when, first paragraph sheet metal 7 must be fully immersed in liquid, then L is always,
L is total=L1+L2x；
When the 3rd section by liquid-immersed when, first paragraph, second segment sheet metal 7 must be fully immersed in liquid, then L is total
For,
L is total=L1+L2+L3x；
When the 4th section by liquid-immersed when, first paragraph, second segment, the 3rd section of sheet metal 7 must be fully immersed in liquid,
So L is always,
L is total=L1+L2+L3+L4x；
The like：When liquid-immersed N section,
L is total=L1+L2+L3+L4.........+LNx；
So judge using segmentation that the method that the height method of liquid analyzes liquid level than single hop before improves in precision
Original N times, error be the 1/N of original error it is achieved that high-precision measurement, also reduce temperature drift simultaneously.
Using the principle measurement liquid level of electric capacity scanning, solve when the medium of liquid changes simultaneously, can be automatic
Adapt to the change of different medium, principle is as follows：
The hypothesis aerial capacity of first paragraph sheet metal 7 is C1xL, and the capacity that liquid level floods in a liquid completely is
C1xH, first paragraph height be L, when measured medium is in the range of first paragraph, then his change than δ is,
δ=(C1xH-C1xL)/L,
Assume the N section electric capacity material of electrode, highly, width, length is all just the same, then can obtain the change of N section
More identical than all.According to this principle, when media variations, his no-load voltage ratio also changes, so can according to the no-load voltage ratio of first paragraph
The height of liquid to calculate the no-load voltage ratio of other sections, can be extrapolated according to no-load voltage ratio, be so achieved that automatic adaptation different medium
Function.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement made etc., should be included within the scope of the present invention.
Claims (7)
1. one kind becomes scanning level measurement sensor, the letter being connected including electrode stem with electrode stem using grid capacitive is high-precision
Number processing meanss and the electrical appliance kit for protection signal processing meanss, described electrode stem passes through electrode connecting parts and described electrical appliance kit
Be connected it is characterised in that：Described electrode stem includes inner and outer electrodes, and described interior electrode passes through an electrode supporting and institute
State external electrode to be connected, described interior electrode includes two or more sheet metals and a support round rod, described sheet metal is uniform
Be distributed in above described support round rod, described sheet metal passes through described support round rod being fixedly connected with described support round rod,
Each sheet metal described is provided with a lead, and described lead is drawn by support round rod, gathers signal for signal processing apparatus.
2. employing grid capacitive according to claim 1 high-precision become scanning level measurement sensor it is characterised in that：Described
It is provided with the distance of 0.1-1mm between sheet metal.
3. employing grid capacitive according to claim 1 high-precision become scanning level measurement sensor it is characterised in that：Described
Electrical appliance kit includes housing, the upper lid being located at housing upper and lower ends and lower cover, and described upper lid and described lower cover are fixed with described housing
Connect.
4. employing grid capacitive according to claim 3 high-precision become scanning level measurement sensor it is characterised in that：Described
Housing upper end is provided with signal display apparatus, and described signal display apparatus pass through wire and pass through described upper lid and described signal
Processing meanss are connected.
5. employing grid capacitive according to claim 3 high-precision become scanning level measurement sensor it is characterised in that：Described
Housing lower end is provided with binding post.
6. employing grid capacitive according to claim 5 high-precision become scanning level measurement sensor it is characterised in that：Described
Binding post is water joint.
7. employing grid capacitive according to claim 1 high-precision become scanning level measurement sensor it is characterised in that：Described
It is provided with one for fixing flange between electrode stem and described electrode connecting parts.
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| CN201410110575.9A CN103913207B (en) | 2014-03-24 | 2014-03-24 | High-precision variable-scan oil level measurement sensor with matrix capacitor |
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| CN103913207B true CN103913207B (en) | 2017-02-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105486374B (en) * | 2016-01-18 | 2019-01-04 | 上海云鱼智能科技有限公司 | Quiet dynamic bimodulus level-sensing device and its method for measuring material position |
| CN105526989B (en) * | 2016-01-18 | 2019-01-04 | 上海云鱼智能科技有限公司 | The verifying of mechanical action auxiliary, anti-bridging static schema level-sensing device and its measurement method |
| CN105698899A (en) * | 2016-03-31 | 2016-06-22 | 上海云鱼智能科技有限公司 | Static-gesture dual-mode material level meter and measuring method thereof |
| CN107192425A (en) * | 2017-04-24 | 2017-09-22 | 河南菲普斯特仪器仪表有限公司 | A kind of liquid level emasuring device and application process of the adaptive range of sectional capacitance |
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| US7665347B2 (en) * | 2005-11-11 | 2010-02-23 | Ngk Spark Plug Co., Ltd. | Liquid state detecting apparatus |
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| CN87211033U (en) * | 1987-08-01 | 1988-04-06 | 天津大学 | Condensor oil gauge |
| CN2711704Y (en) * | 2004-06-16 | 2005-07-20 | 单金荣 | Fuel sensor for vehicle |
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Address after: 450000 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 11 in Henan Province, the National University Science Park incubator incubator building No. 1 No. 408-418 Patentee after: Henan wisdom water Co., Ltd. Address before: 450000 Zhengzhou economic and Technological Development Zone, Henan Road, No. 1319 East Road, building 63-64, No. 4 Patentee before: Zhengzhou Keda Automatic Engineering Co., Ltd. |
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Address after: 450000 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 11 in Henan Province, the National University Science Park incubator incubator building No. 1 No. 408-418 Patentee after: Henan wisdom water affairs Limited by Share Ltd Address before: 450000 Henan city of Zhengzhou province high tech Industrial Development Zone Long Chun Road No. 11 in Henan Province, the National University Science Park incubator incubator building No. 1 No. 408-418 Patentee before: Henan wisdom water Co., Ltd. |
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