CN2711704Y - Fuel sensor for vehicle - Google Patents
Fuel sensor for vehicle Download PDFInfo
- Publication number
- CN2711704Y CN2711704Y CN 200420036776 CN200420036776U CN2711704Y CN 2711704 Y CN2711704 Y CN 2711704Y CN 200420036776 CN200420036776 CN 200420036776 CN 200420036776 U CN200420036776 U CN 200420036776U CN 2711704 Y CN2711704 Y CN 2711704Y
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- CN
- China
- Prior art keywords
- circuit
- circuit board
- signal
- outer tube
- oil
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- 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 relates to a fuel sensor for vehicle, and belongs to the technical field of the manufacturing of the automobile and the motorcycle accessory. The utility model is mainly composed of a fixed seat (1) which is provided with an outer pipe (11) and a bolt hole (2), a circuit board (4) which is arranged in the fixed seat (1) and is provided with a binding post (7), an internal electrode (10) which is arranged in the outer pipe and is fixedly connected with the circuit board, etc. The circuit board (4) is provided with a voltage regulator circuit (16), a pulse frequency modulation, an Analog-to-Digital (A/D) transfer circuit (17), a signal amplification circuit (18), a signal output circuit (19) and a linearity correction circuit (20). The utility model has professional design and concise and smart complete structure, adopts the structural form of the capacitance type electrode which is formed by the outer tube and the internal electrode, and causes the electric capacitance of the capacitance type electrode to generate the change following the change of the fuel level of the fuel. The changed impulse signal passes through the pulse frequency modulation, the alternative current and direct current conversion circuit, the signal amplification circuit and the linearity correction circuit, and the signal output electrode sends out the signal. The signal is sent to the signal input end of the fuel watch of the instrument panel, drives the watch hand, and reaches to the fuel level change indicating.
Description
Technical field
The utility model relates to a kind of vehicle-oil sensor, belongs to the manufacturing technology field of automobile, motorcycle accessories.
Background technology
The variable condition of reflection fuel level is generally used float-type transmitter on existing automobile, the motorcycle, because float-type transmitter is along with automobile, motorcycle constantly jolting in the process of moving, there is mechanical friction, whenever jolt once, float-type transmitter just rubs once, long-time repeated friction causes float-type transmitter wear out failure in a short time, must will could change after the fuel tank dismounting.And the dismounting of automobile, bike tank is very heavy work, often changes float-type transmitter and increases workload for maintenance, thereby increase the expenditure of maintenance cost.Simultaneously, because the wear out failure of float-type transmitter short-term makes the oil level reflection inaccurate, be easy to the oil-break phenomenon in the way takes place and vehicle is cast anchor.
Summary of the invention
The purpose of this utility model provides a kind of reasonable in design, processing, easy to install and use, can do not change original automobile, motorcycle with the instrument structure situation under, reliable, stable, long-life ground reflection automobile, motorcycle are with the vehicle-oil sensor of fuel level variable condition.
The utility model is a vehicle-oil sensor, it is characterized in that the holder by band outer tube and bolt hole, places the circuit board of band binding post in the holder, places the formations such as interior electrode that link to each other with circuit board in the outer tube; Isolate the fixing capacitive electrode that constitutes by insulating washer between described outer tube and the interior electrode, described outer tube is connected with circuit board by short lead.
Can be provided with pulse frequency modulation and A/D change-over circuit on the described circuit board, signal amplification circuit, signal output apparatus; Capacitive electrode is by pulse frequency modulation and A/D change-over circuit, signal amplification circuit, and signal output apparatus links to each other with binding post.
The solid seal encapsulation of described circuit board available epoxy in holder.
Electrode can be with bolted on circuit board in described.
Also can isolate the location between the bottom of described outer tube and the interior electrode by the lower gasket that has oil feed groove.Make in fuel oil energy turnover outer tube and the interior gaps between electrodes.The top of described outer tube also can be provided with a vent port, and inner air tube can be discharged smoothly when oil level was risen.
Also can be provided with linearity circuit between pulse frequency modulation on the described circuit board and A/D change-over circuit and the signal amplification circuit.Also can be provided with respectively and binding post pulse frequency modulation and A/D change-over circuit, signal amplification circuit, the mu balanced circuit that signal output apparatus links to each other on the described circuit board.
Also can be provided with the full position regulator potentiometer and the zero trimmer that link to each other with signal amplification circuit on the circuit board on the solid seal of described epoxy resin, produce debugging usefulness for manufacturer.
The utility model compared with prior art has following outstanding advantage and good effect:
1, adopts the version that under insulating washer, lower gasket location, forms capacitive electrode by outer tube and interior electrode, capacitive electrode electric capacity when fuel level changes can be changed, along with rising, the decline of fuel level, make outer tube and interior interelectrode electric capacity also along with increasing or reducing.Because the variation of electric capacity causes circuit signal sampling stage frequency change, the output pulse also changes thereupon, the change pulse signal through the conversion of pulse frequency modulation (PFM), AC/DC, signal amplify, behind the linearity correction by signal output stage output signal, deliver to panel board fuel gauge signal input part, drive indicator deflection, change indication thereby reach oil level.
2, holder and circuit board adopt the solid integrated solid-state structure of seal of epoxy resin, and be light and handy, firm, can reduce the signal transmission error, and the signal transmission do not need to adopt other measures only to need to transmit with the ordinary copper flexible circuit conductor by binding post, easy for installation.
3, holder is fixedlyed connected with the fuel oil fuel tank, does not in use have any mechanical friction, has guaranteed that effectively the utility model is reliable, stable, long-life ground reflects automobile, motorcycle fuel level variable condition.
4, since at present the fuel gauge that uses mostly be nonlinearities change greatly, so the utility model only need be by the linearity of electrode structure in changing, can be easily and the existing supporting use of widely used fuel gauge.
The utility model is reasonable in design, the terminal with compact integral structure dexterity, by changing outer length of tube, adjusting each circuit elements device parameters on the circuit board, do what detection of amount of fuel applicable to various roof-mounted automobile, motor fuel tank for automobile and vapour, diesel fuel oil, also can be used as the replacement aftermarket attachment of existing automobile, motorcycle usefulness float-type transmitter, alleviate maintenance load, improve the vehicle ' reliability.
Description of drawings
Fig. 1 is an one-piece construction cut-open view of the present utility model;
Fig. 2 is a structure vertical view shown in Figure 1;
Fig. 3 is a circuit working schematic diagram of the present utility model.
Among the figure: 1 is holder, and 2 is bolt hole, and 3 is insulating washer, and 4 is circuit board, 5 is bolt, and 6 is short lead, and 7 is binding post, and 8 are the solid seal of epoxy resin, 9 is vent port, and 10 is interior electrode, and 11 is outer tube, and 12 is oil feed groove, 13 is lower gasket, and 14 is the zero-bit potentiometer, and 15 are full position potentiometer, 16 is mu balanced circuit, and 17 is pulse frequency modulation and A/D change-over circuit, and 18 is signal amplification circuit, 19 is signal output apparatus, and 20 is linearity circuit, and 21 is capacitive electrode.
Embodiment
The utility model places the circuit board 4 of band binding post 7 in the holder 1 mainly by the holder 1 of band outer tube 11 and bolt hole 2, places interior electrode 10 formations such as grade of fixedlying connected by bolt 5 with circuit board 4 in the outer tube 11.Isolate the location by insulating washer 3 and the lower gasket 13 that has oil feed groove 12 between outer tube 11 and the interior electrode 10, form capacitive electrode 21.The top of outer tube 11 also is provided with a vent port 9, and is connected with circuit board 4 by short lead 6.
During use, the outer tube 11 of holder 1 bottom is inserted in the fuel oil in the fuel tanks, between holder 1 and fuel tank mounting hole contact plane, put into oil-resistant seal ring, penetrate with bolt that 5 bolts hole 2 on the holder 1 are interior to be fastened on the utility model on the fuel tank.The copper flexible circuit conductor that fuel gauge is drawn from the panel board is positive source Vcc, earthing pole Gnd, the signal output stage Out on the corresponding binding post 7 respectively, and is fastening with nut, plain cushion, bullet pad.
During work, energized, along with rising, the decline of fuel level between outer tube 11 and the interior electrode 10, the electric capacity that makes 10 at outer tube 11 and interior electrode is also along with increasing or reducing.After detecting, the capacitive electrode 21 that the high-low signal of fuel level constitutes via outer tube 11 and interior electrode 10 delivers to circuit board 3, because the variation of capacitive electrode 21 electric capacitys causes circuit signal sampling stage frequency change, the output pulse also changes thereupon, the change pulse signal carries out pulse frequency modulation through pulse frequency modulation (PFM) and A/D change-over circuit 17, the AC/DC conversion, carrying out signal through signal amplification circuit 18 again amplifies, after linearity circuit 20 carries out linearity correction, by signal output apparatus 19 output signals, deliver to panel board fuel gauge signal input part through signal output stage Out binding post 7 by the copper flexible circuit conductor, drive indicator deflection, deflect into different corresponding scale values according to unlike signal driven indicator, the fuel level in the fuel tank is accurately shown on the panel board fuel gauge.
Claims (9)
1, a kind of vehicle-oil sensor, it is characterized in that holder (1) by band outer tube (11) and bolt hole (2), place the circuit board (4) of band binding post (7) in the holder (1), place the interior electrode (10) that links to each other with circuit board (4) in the outer tube (11) to constitute; Isolate the fixing capacitive electrode (21) that constitutes by insulating washer (3) between described outer tube (11) and the interior electrode (10), described outer tube (11) is connected with circuit board (4) by short lead (6).
2, by the described vehicle-oil sensor of claim 1, it is characterized in that described circuit board (4) is provided with pulse frequency modulation and A/D change-over circuit (17), signal amplification circuit (18), signal output apparatus (19); Capacitive electrode (21) is by pulse frequency modulation and A/D change-over circuit (17), signal amplification circuit (18), and signal output apparatus (19) links to each other with binding post (7).
3,, it is characterized in that described circuit board (4) encapsulates with the solid seal (8) of epoxy resin in holder (1) by the described vehicle-oil sensor of claim 1.
4,, it is characterized in that described interior electrode (10) is fastened on the circuit board (4) with bolt (5) by the described vehicle-oil sensor of claim 1.
5,, isolate by the lower gasket (13) that has oil feed groove (12) between the bottom that it is characterized in that described outer tube (11) and the interior electrode (10) and locate by the described vehicle-oil sensor of claim 1.
6, by claim 1 or 5 described vehicle-oil sensors, it is characterized in that the top of described outer tube (11) also is provided with a vent port (9).
7,, it is characterized in that also being provided with linearity circuit (20) between pulse frequency modulation on the described circuit board (4) and A/D change-over circuit (17) and the signal amplification circuit (18) by claim 1 or 2 described vehicle-oil sensors.
8, by claim 1 or 2 described vehicle-oil sensors, it is characterized in that also being provided with on the described circuit board (4) respectively and binding post (7), pulse frequency modulation A/D change-over circuit (17), signal amplification circuit (18), the mu balanced circuit (16) that signal output apparatus (19) links to each other.
9,, it is characterized in that also being provided with on the solid seal (8) of described epoxy resin full the regulator potentiometer (15) and the zero trimmer (14) that link to each other with signal amplification circuit (18) on the circuit board (4) by claim 1 or 2 described vehicle-oil sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420036776 CN2711704Y (en) | 2004-06-16 | 2004-06-16 | Fuel sensor for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420036776 CN2711704Y (en) | 2004-06-16 | 2004-06-16 | Fuel sensor for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2711704Y true CN2711704Y (en) | 2005-07-20 |
Family
ID=36192810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420036776 Expired - Fee Related CN2711704Y (en) | 2004-06-16 | 2004-06-16 | Fuel sensor for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2711704Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922958A (en) * | 2010-09-21 | 2010-12-22 | 重庆德格科技发展有限公司 | Combed capacitance type oil-level sensor box capable of blocking oil level fluctuation |
| CN102401677A (en) * | 2010-09-08 | 2012-04-04 | 成都泛华航空仪表电器有限公司 | Compound oil level sensor |
| CN103868567A (en) * | 2012-12-13 | 2014-06-18 | 上海朝辉压力仪器有限公司 | Capacitance liquid level transmitter |
| CN103913207A (en) * | 2014-03-24 | 2014-07-09 | 郑州科达自动化工程有限公司 | High-precision variable-scan oil level measurement sensor with matrix capacitor |
| CN104236672A (en) * | 2014-09-30 | 2014-12-24 | 四川泛华航空仪表电器有限公司 | Multi-redundancy capacitance type oil quantity sensor |
| CN106225876A (en) * | 2016-08-18 | 2016-12-14 | 四川泛华航空仪表电器有限公司 | Condenser type temperature-compensating level measurement sensor |
| CN107121174A (en) * | 2017-05-19 | 2017-09-01 | 中航工业南航（深圳）测控技术有限公司 | Fuel-quantity transducer and fuel tank |
| CN111707329A (en) * | 2020-06-04 | 2020-09-25 | 河南菲普斯特仪器仪表有限公司 | Explosion-proof type capacitance level meter |
-
2004
- 2004-06-16 CN CN 200420036776 patent/CN2711704Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401677A (en) * | 2010-09-08 | 2012-04-04 | 成都泛华航空仪表电器有限公司 | Compound oil level sensor |
| CN101922958A (en) * | 2010-09-21 | 2010-12-22 | 重庆德格科技发展有限公司 | Combed capacitance type oil-level sensor box capable of blocking oil level fluctuation |
| CN103868567A (en) * | 2012-12-13 | 2014-06-18 | 上海朝辉压力仪器有限公司 | Capacitance liquid level transmitter |
| CN103913207A (en) * | 2014-03-24 | 2014-07-09 | 郑州科达自动化工程有限公司 | High-precision variable-scan oil level measurement sensor with matrix capacitor |
| CN103913207B (en) * | 2014-03-24 | 2017-02-22 | 郑州科达自动化工程有限公司 | High-precision variable-scan oil level measurement sensor with matrix capacitor |
| CN104236672A (en) * | 2014-09-30 | 2014-12-24 | 四川泛华航空仪表电器有限公司 | Multi-redundancy capacitance type oil quantity sensor |
| CN106225876A (en) * | 2016-08-18 | 2016-12-14 | 四川泛华航空仪表电器有限公司 | Condenser type temperature-compensating level measurement sensor |
| CN106225876B (en) * | 2016-08-18 | 2023-05-09 | 四川泛华航空仪表电器有限公司 | Capacitive temperature compensation oil level measuring sensor |
| CN107121174A (en) * | 2017-05-19 | 2017-09-01 | 中航工业南航（深圳）测控技术有限公司 | Fuel-quantity transducer and fuel tank |
| CN107121174B (en) * | 2017-05-19 | 2019-07-02 | 中航工业南航（深圳）测控技术有限公司 | Fuel-quantity transducer and fuel tank |
| CN111707329A (en) * | 2020-06-04 | 2020-09-25 | 河南菲普斯特仪器仪表有限公司 | Explosion-proof type capacitance level meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |