CN203432648U - Capacitive fuel sensor - Google Patents
Capacitive fuel sensor Download PDFInfo
- Publication number
- CN203432648U CN203432648U CN201320570176.1U CN201320570176U CN203432648U CN 203432648 U CN203432648 U CN 203432648U CN 201320570176 U CN201320570176 U CN 201320570176U CN 203432648 U CN203432648 U CN 203432648U
- Authority
- CN
- China
- Prior art keywords
- rapier
- fuel tank
- probe
- fuel
- interior
- 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 - Lifetime
Links
Images
Abstract
The utility model discloses a capacitive fuel sensor which comprises a fuel tank. The improvement on the capacitive fuel sensor is that the capacitive fuel sensor further comprises an inner probe and an outer probe; the cylindrical inner probe is perpendicularly arranged in the fuel tank, and is in contact with the center part of the bottom of the fuel tank; the cylindrical outer probe is coaxially sleeved outside the inner probe, and is in contact with the bottom of the fuel tank; a space is formed between the outer surface of the inner probe and the inner surface of the outer probe; the inner probe and the outer probe are respectively connected with extraction electrodes. The capacitive fuel sensor has the main application and advantages that the part between the inner probe (positive electrode) and the outer probe (negative electrode) in the fuel tank is filled with fuel liquid medium; the generated capacitance is varied linearly along with the liquid level; the variable quantity of the liquid level (that is, the variable quantity of the capacitance) is transformed into a standard electric signal to be output, the detection to the height of the oil level is realized. The oil level of the fuel tank is detected continuously and accurately, an oil float and a reed are omitted, the structure is simple, the service life is long, and the reliability is high.
Description
Technical field
The utility model relates to fuel oil tank of heavy duty car technical field, is specifically related to a kind of condenser type fuel sensor.
Background technology
Heavy-duty car uses magnetic inductive fuel sensor at present, is by the magnetic field of oil float generation, to control the principle of the break-make of tongue tube, the variation of tested oil level is changed into resistance, voltage signal output, thereby detect fuel level in tank height.But its resistance, Voltage-output signal are discontinuous output signals, have oil float and tongue tube in magnetic inductive fuel sensor, and structure is more complicated, and reliability is not high.
Summary of the invention
The utility model is for the deficiency existing in background technology, and the technical matters that solve is: the fuel sensor that a kind of reliability is high is provided.
The utility model is for solving the problems of the technologies described above, the technical scheme of taking is: a kind of condenser type fuel sensor, comprise fuel tank, its improvement is: also comprise interior rapier and outer rapier, columniform interior rapier is vertically placed in the place's contact of fuel tank Nei,Bing Yu fuel tank bottom centre, and columnar outer rapier coaxial sleeve contacts outside interior rapier and with fuel tank bottom;
Between interior rapier outside surface and outer rapier inside surface, have clearance space, interior rapier, outer rapier connect respectively an extraction electrode.
Further, described interior rapier is identical with the spacing height of the oil mass of fuel tank with the height of outer rapier.
The utility model compared with prior art, beneficial effect is: between the inside and outside rapier (positive and negative electrode) arranging in fuel tank, be filled with fuel liquid medium, the electric capacity forming is along with liquid level is linear change, the variable quantity of liquid level (being the variable quantity of electric capacity) is converted to the electric signal output of standard, realize the detection of level height.Can detect exactly continuously fuel level in tank height, cancel oil float and tongue tube, simple in structure, long service life, reliability is high.
accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Wherein: 1, fuel tank; 2, interior rapier; 3, outer rapier; 4, extraction electrode.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
As shown in Figure 1, condenser type fuel sensor, comprises fuel tank 1, also comprises interior rapier 2 and outer rapier 3, columniform interior rapier 2 is vertically placed in fuel tank 1 and with fuel tank 1 bottom centre place and contacts, and columnar outer rapier 3 coaxial sleeves contact outside interior rapier 2 and with fuel tank 1 bottom;
Between interior rapier 2 outside surfaces and outer rapier 3 inside surfaces, have clearance space, interior rapier 2, outer rapier 3 connect respectively an extraction electrode 4.
Principle of work: the electrode that interior rapier 2 is capacitor, the outer rapier 3 in outside is another electrode of capacitor.ε is the specific inductive capacity of fuel liquid medium, ε
0for the specific inductive capacity of air, the height that L is electrode, Lx is liquid level, and Lx is changing value.R is the radius value of the external diameter of interior rapier 2, and R is the radius value of the internal diameter of outer rapier 3.When the liquid level of tested fuel oil is between concentric cylindrical electrode, while highly changing, the variation of electric capacity will be caused.Now, be equivalent to the parallel connection of two coaxial cylindrical condensers, known according to capacitance equation, its capacitance:
C=C
0+C
1=?2Πε
0（L-Lx）/?ln?（R/r）+2ΠεLx?/?ln?（R/r）
=?2Πε
0L?/?ln?（R/r）+2Π（ε-ε
0）Lx?/?ln?（R/r）
So condenser type fuel sensor utilizes the electric capacity forming between rapier to be linear change principle with fuel liquid level, convert the variable quantity of fuel liquid level to linear signal output, can directly show the height of fuel level in tank.
For the fuel tank of certain model, innage is limited, is provided with fuel head restriction, in order to realize the whole process of fuel head, detects, and interior rapier (2) is identical with the spacing height of oil mass of fuel tank (1) with the height of outer rapier (3).
Adopt after the utility model, between the inside and outside rapier (positive and negative electrode) arranging, be filled with fuel liquid medium in fuel tank, the electric capacity forming, along with liquid level is linear change, converts the variable quantity of liquid level (being the variable quantity of electric capacity) to the electric signal output of standard, realizes the detection of level height.Can detect exactly continuously fuel level in tank height, cancel oil float and tongue tube, simple in structure, long service life, reliability is high.
Claims (2)
1. a condenser type fuel sensor, comprise fuel tank (1), it is characterized in that: also comprise interior rapier (2) and outer rapier (3), columniform interior rapier (2) is vertically placed in fuel tank (1) and with fuel tank (1) bottom centre place and contacts, and columnar outer rapier (3) coaxial sleeve contacts outside interior rapier (2) and with fuel tank (1) bottom;
Between interior rapier (2) outside surface and outer rapier (3) inside surface, have clearance space, interior rapier (2), outer rapier (3) connect respectively an extraction electrode (4).
2. condenser type fuel sensor according to claim 1, is characterized in that: described interior rapier (2) is identical with the spacing height of oil mass of fuel tank (1) with the height of outer rapier (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320570176.1U CN203432648U (en) | 2013-09-16 | 2013-09-16 | Capacitive fuel sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320570176.1U CN203432648U (en) | 2013-09-16 | 2013-09-16 | Capacitive fuel sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203432648U true CN203432648U (en) | 2014-02-12 |
Family
ID=50061681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320570176.1U Expired - Lifetime CN203432648U (en) | 2013-09-16 | 2013-09-16 | Capacitive fuel sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203432648U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113324623A (en) * | 2021-06-23 | 2021-08-31 | 北京锐达仪表有限公司 | Capacitance guided wave magnetic composite liquid level meter and measuring device |
-
2013
- 2013-09-16 CN CN201320570176.1U patent/CN203432648U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113324623A (en) * | 2021-06-23 | 2021-08-31 | 北京锐达仪表有限公司 | Capacitance guided wave magnetic composite liquid level meter and measuring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204758082U (en) | Intelligent drinking cup of non -contact level sensor and applied this sensor | |
| CN103292787A (en) | Tilt angle sensor | |
| CN101509800B (en) | Method for simultaneously detecting double liquid levels of oil and water | |
| CN203432648U (en) | Capacitive fuel sensor | |
| CN203298764U (en) | Tilt angle sensor | |
| CN101476917B (en) | Sensor for simultaneously detecting liquid level and electro-conductibility | |
| CN203163833U (en) | Slide-bar type liquid-level height acquisition instrument | |
| CN203893916U (en) | Fuel level sensor with movable parallel pole plate and fixed parallel pole plate | |
| CN104848960B (en) | Capacitive temperature sensor | |
| CN203148527U (en) | Sliding resistor type liquid level sensor | |
| CN101545799B (en) | Non-contact sensor for simultaneously detecting liquid level and electrical conductivity | |
| CN204202774U (en) | Capacitive temperature sensor | |
| CN204963949U (en) | Digital fuel quantity sensor of intelligence | |
| CN204694273U (en) | A kind of variable-area capacitive sensor | |
| CN201820638U (en) | Ceramic dielectric ring capacitor | |
| CN202393456U (en) | Fully-digitalized capacitive automobile oil level sensor | |
| CN201333927Y (en) | Pressure oil-quantity induction-type automobile oil tank | |
| CN202041342U (en) | Electric insulation structure of differential metal capacitance bellows and metal shell assembly | |
| CN103063236A (en) | Capacitive sensor | |
| CN203396451U (en) | Automobile oil level monitoring device | |
| CN203734618U (en) | Test probe needle for testing performance of battery piece | |
| CN202453136U (en) | Novel capacitance pole plate suspension structure of differential metal capacitance diaphragm capsule | |
| CN201707098U (en) | Differential pressure and electrode integrated water level meter | |
| CN206019565U (en) | A kind of electrical cnnector contact pin micrometric displacement detection means | |
| CN203405268U (en) | Micro spring structure precise sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |