CN203893916U - Fuel level sensor with movable parallel pole plate and fixed parallel pole plate - Google Patents
Fuel level sensor with movable parallel pole plate and fixed parallel pole plate Download PDFInfo
- Publication number
- CN203893916U CN203893916U CN201420261918.7U CN201420261918U CN203893916U CN 203893916 U CN203893916 U CN 203893916U CN 201420261918 U CN201420261918 U CN 201420261918U CN 203893916 U CN203893916 U CN 203893916U
- Authority
- CN
- China
- Prior art keywords
- parallel plate
- plate electrode
- pole plate
- parallel pole
- fuel level
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a fuel level sensor. The fuel level sensor comprises a shell, a floating ball, a fixed parallel pole plate and a movable parallel pole plate. The shell is provided with an accommodating space, a plug is arranged at the open end of the shell, both the fixed parallel pole plate and the movable parallel pole plate are located in the shell, the movable parallel pole plate is located under the fixed parallel pole plate, the fixed parallel pole plate and the movable parallel pole plate form an adjustable capacitor taking air as dielectric, the floating ball is fixed with the movable parallel pole plate through a connecting rod, and the fixed parallel pole plate and the movable parallel pole plate are respectively and electrically connected with two pins of the plug. By the fuel level sensor, the distance between the parallel pole plates is changed by the aid of the floating ball so as to change capacitance of the capacitor, fuel level is detected according to the size of the capacitance of the capacitor, and the fuel level can be detected accurately.
Description
Technical field
The utility model relates to a kind of sensor, particularly relates to a kind of have movable parallel plate electrode and the fixing fuel level sensor of parallel plate electrode.
Background technology
Fuel level sensor is the important accessory of motor car engine fuel transfer system, and its Main Function is the oil mass information of fuel tank that provides for driver.The fuel level sensor using on the market is at present the unenclosed construction form being combined into one with electric fuel punp, thick-film resistor sheet and electric contact point used are mostly immersed in fuel oil, and electric contact is single contact, owing to being subject to the corrosion of fuel oil, resistor disc and electric contact are subject to the conducting of oxidation affects metering circuit, cause fuel metering to lose efficacy, and the fuel level sensor power consumption of conventional resistance chip is large.
Utility model content
It is little that the technical problems to be solved in the utility model is to provide a kind of power consumption, and sensing device does not contact the movable parallel plate electrode of having of fuel oil and the fixing fuel level sensor of parallel plate electrode.
For addressing the above problem, the utility model provides a kind of have movable parallel plate electrode and the fixing fuel level sensor of parallel plate electrode, described have movable parallel plate electrode and fixedly the fuel level sensor of parallel plate electrode comprise housing, ball float, fixedly parallel plate electrode and movable parallel plate electrode, in described housing, there is accommodation space, described shell nozzle end is provided with plug, described fixedly parallel plate electrode and movable parallel plate electrode electric capacity are all positioned at described housing, and described movable parallel plate electrode be positioned at described fixedly parallel plate electrode under, described fixedly parallel plate electrode and movable parallel plate electrode form one and take the variable capacitance that air dielectric is medium, described ball float is fixed by connecting link and described movable parallel plate electrode, described fixedly parallel plate electrode and movable parallel plate electrode are electrically connected to two true stitch of plug respectively.
Further, described housing bottom is provided with through hole, is provided with a dividing plate in described housing, and described dividing plate is divided into the first cavity and the second cavity by housing, described fixedly parallel plate electrode and described movable parallel plate electrode are all positioned at described the first cavity, and described plug is positioned at described the second cavity.
Further, the bottom of described movable parallel plate electrode is provided with Connection Block, and described Connection Block is provided with screw, and the screw that described connecting link is provided with on screw thread and described Connection Block matches.
Further, the junction of described plug and the second cavity is provided with ring seal packing ring.
The utlity model has movable parallel plate electrode and distance that fixedly fuel level sensor of parallel plate electrode utilizes ball float to change between the parallel plate electrode of electric capacity and change capacitance, according to the size of capacitance, detect fuel level, can accurately detect fuel level.
Accompanying drawing explanation
Fig. 1 the utlity model has movable parallel plate electrode and the fixing structural representation of the better embodiment of the fuel level sensor of parallel plate electrode.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, the utlity model has movable parallel plate electrode and fixedly the better embodiment of the fuel level sensor of parallel plate electrode comprise housing 1, ball float 4, fixedly parallel plate electrode 2 and movable parallel plate electrode 3, in described housing 1, there is accommodation space, described housing 1 openend is provided with plug 6, described fixedly parallel plate electrode 2 and movable parallel plate electrode 3 electric capacity are all positioned at described housing 1, and described movable parallel plate electrode 3 be positioned at described fixedly parallel plate electrode 2 under, described fixedly parallel plate electrode 2 and movable parallel plate electrode 3 forms one and take the variable capacitance that air dielectric is medium, described ball float 4 is fixing with described movable parallel plate electrode 3 by connecting link 5, described fixedly parallel plate electrode 2 and movable parallel plate electrode 3 are electrically connected to two true stitch of plug 6 respectively.
Described housing 1 bottom is provided with through hole, in described housing 1, be provided with a dividing plate, described dividing plate is divided into the first cavity 12 and the second cavity 11 by housing 1, and described fixedly parallel plate electrode 2 and described movable parallel plate electrode 3 are all positioned at described the first cavity 12, and described plug 6 is positioned at described the second cavity 11.The bottom of described movable parallel plate electrode 3 is provided with Connection Block 31, and described Connection Block 31 is provided with screw, and the screw that described connecting link 5 is provided with on screw thread and described Connection Block 31 matches, and the junction of described plug 6 and the second cavity 11 is provided with ring seal packing ring.
Distance between capacitance and two parallel plate electrodes meets following relational expression:
Wherein, C is capacitance to C=ε s/4 π kd, and ε is the specific inductive capacity of medium between pole plate, S be two parallel plate electrodes over against area, k is electrostatic force constant (being also constant), d is the distance between pole plate.Can find out when area is constant, between two parallel plate electrodes, distance d and described capacitance C are inversely proportional to; When the distance d between two parallel plate electrodes increases, capacitance C reduces; When the distance d between two parallel plate electrodes reduces, capacitance C increases.
Ball float 4 floats in fuel tank 7, when the oil level in fuel tank 7 changes, ball float 4 is also along with oil level lifting, ball float 4 is connected with described movable parallel plate electrode 3 by connecting link 5 again, therefore parallel plate electrode also can be along with the oil level lifting of fuel tank 7, be to change between movable parallel plate electrode 3 and between described fixedly parallel plate electrode 2, capacitance also and then changes, and by Detection capacitance capacity, realizes the detection to oil level.There is not DC power in electric capacity, and during capacitance measurement, only need to use ac small signal, so the utility model fuel level sensor is low in energy consumption.
These are only embodiment of the present utility model; not thereby limit the scope of the claims of the present invention; every equivalent structure that utilizes the utility model instructions and accompanying drawing content to do; directly or indirectly be used in other relevant technical fields, all in like manner within scope of patent protection of the present utility model.
Claims (4)
1. a fuel level sensor, it is characterized in that: described fuel level sensor comprises housing, ball float, fixedly parallel plate electrode and movable parallel plate electrode, in described housing, there is accommodation space, described shell nozzle end is provided with plug, described fixedly parallel plate electrode and movable parallel plate electrode electric capacity are all positioned at described housing, and described movable parallel plate electrode be positioned at described fixedly parallel plate electrode under, described fixedly parallel plate electrode and movable parallel plate electrode form one and take the variable capacitance that air dielectric is medium, described ball float is fixed by connecting link and described movable parallel plate electrode, described fixedly parallel plate electrode and movable parallel plate electrode are electrically connected to two stitch of plug respectively.
2. fuel level sensor as claimed in claim 1, it is characterized in that: described housing bottom is provided with through hole, in described housing, be provided with a dividing plate, described dividing plate is divided into the first cavity and the second cavity by housing, described fixedly parallel plate electrode and described movable parallel plate electrode are all positioned at described the first cavity, and described plug is positioned at described the second cavity.
3. fuel level sensor as claimed in claim 1 or 2, is characterized in that: the bottom of described movable parallel plate electrode is provided with Connection Block, and described Connection Block is provided with screw, and the screw that described connecting link is provided with on screw thread and described Connection Block matches.
4. fuel level sensor as claimed in claim 2, is characterized in that: the junction of described plug and the second cavity is provided with ring seal packing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420261918.7U CN203893916U (en) | 2014-05-21 | 2014-05-21 | Fuel level sensor with movable parallel pole plate and fixed parallel pole plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420261918.7U CN203893916U (en) | 2014-05-21 | 2014-05-21 | Fuel level sensor with movable parallel pole plate and fixed parallel pole plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203893916U true CN203893916U (en) | 2014-10-22 |
Family
ID=51720307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420261918.7U Expired - Fee Related CN203893916U (en) | 2014-05-21 | 2014-05-21 | Fuel level sensor with movable parallel pole plate and fixed parallel pole plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203893916U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106323416A (en) * | 2016-09-23 | 2017-01-11 | 惠州华阳通用电子有限公司 | Capacitive oil mass measuring device |
| CN109974809A (en) * | 2019-04-24 | 2019-07-05 | 北京晨淼科技有限公司 | Oil level measuring device |
-
2014
- 2014-05-21 CN CN201420261918.7U patent/CN203893916U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106323416A (en) * | 2016-09-23 | 2017-01-11 | 惠州华阳通用电子有限公司 | Capacitive oil mass measuring device |
| CN109974809A (en) * | 2019-04-24 | 2019-07-05 | 北京晨淼科技有限公司 | Oil level measuring device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20150521 |
|
| EXPY | Termination of patent right or utility model |