CN2456947Y - Digital meter of automobile fuel tank - Google Patents
Digital meter of automobile fuel tank Download PDFInfo
- Publication number
- CN2456947Y CN2456947Y CN 00266192 CN00266192U CN2456947Y CN 2456947 Y CN2456947 Y CN 2456947Y CN 00266192 CN00266192 CN 00266192 CN 00266192 U CN00266192 U CN 00266192U CN 2456947 Y CN2456947 Y CN 2456947Y
- Authority
- CN
- China
- Prior art keywords
- fuel tank
- resistance
- numeral
- level sensor
- long tube
- 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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- Level Indicators Using A Float (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The utility model relates to a digital metering device for a fuel oil tank of an automobile. The utility model is mainly composed of a liquid level sensor, an analog digital converter, a liquid crystal display, a function selecting switch, etc. The utility model is characterized in that oil mass in the fuel oil tank of the automobile is accurately and visually displayed for a driver in a digital mode; in addition, the digit of the charging voltage of an automobile battery and the digit of the water temperature of an engine can be also respectively displayed, and the utility model is also provided with an alarm for water accumulation in the fuel oil tank. The utility model through which the driver can well know the condition of the fuel oil tank when the fuel oil tank is filled with fuel oil or when the automobile is under a running way has the advantages of convenient installation and low cost. The technique of the utility model is especially designed for a fair deal between the automobile driver and a filling station.
Description
The utility model relates to a kind of fuel tank of vehicle numeral metering device.
At present, the fuel gage that is equipped with on most of automobiles all is the scale formula, because the litre number that simple structure, scale be sparse, can not find out fuel oil in the fuel tank accurately, therefore, this just gives illegal petrol service station opportunity, has a mind to give short weight to leading the driver into a trap, particularly along with the repeatedly rise of fuel price, the phenomenon that oiling is given short weight has caused social extensive concern, and automobilists press for the fuel meter of a kind of accurate measurement, intuitive display, stable performance.
The purpose of this utility model is that a kind of fuel tank of vehicle numeral metering device will be provided, and its can accurate measurement, intuitively demonstrate the amount of fuel of fuel tank of vehicle.
Technical solution of the present utility model is achieved in that a kind of fuel tank of vehicle numeral metering device, it is characterized in that it is made up of level sensor, input circuit, analog-to-digital conversion circuit and Liquid Crystal Display (LCD), functional select switch and constant voltage power suspply; Level sensor is installed in the fuel tank along the fuel tank height, is made up of the liquid level float of contact-carrying and electronics oil level gauge; Level sensor is connected with input circuit, be connected with analog-to-digital conversion circuit and Liquid Crystal Display (LCD) through a functional select switch, input circuit converts detected liquid level voltage signal on the level sensor to digital signal through analog-to-digital conversion circuit and delivers in the Liquid Crystal Display (LCD) and show, constant voltage power suspply uses for instrument after with the voltage stabilizing of automotive battery voltage.
Level sensor described in the utility model technical solution, be to utilize the length of resistive band on the electronics oil level gauge to equal the height of fuel tank, obtain the liquid level signal, that utilizes resistive band does not wait width, ratiometric equals the unequal width (width that fuel tank unit reduces at the angle) of fuel tank, resistive band just can obtain reflecting the electric potential signal of the trapped fuel sectional area of whole fuel tank differing heights accurately like this, resistive band is at thick 1 millimeter, wide 15-20 millimeter, on long 400 millimeters the insulcrete, with 0.15 millimeter resistor wire, evenly scratch 20 circles for every centimetre and amount to 800 circles, it is in input circuit R
4Behind the polyphone, the terminal voltage of resistive band should be 4 volts of (design code value) these voltages just can form 800 voltage gradations on the resistive band of 800 circles, and feed flow position float adopts.
The electronics oil level gauge can be on the insulation rod in II type cross section, copper sheet and line are scratched resistive band to stick on respectively on two relative planes that fall in of excellent core, liquid level float centre has being enclosed within on the electronics oil level gauge of oblong aperture activity, the corresponding both sides of float endoporus are equipped with two electric contacts, contact with copper sheet and resistive band on the electronics oil level gauge respectively, the upper end of electronics oil level gauge is provided with bolt, can be connected with the screw on the fuel tank.
The electronics oil level gauge of the level sensor described in the utility model technical solution can also be on the cross section is round outside but spuare inside insulation rod, copper sheet and line are scratched resistive band to be bonded in respectively on the endoporus two relative planes of insulation rod, be drilled with several holes on two planes in addition, the liquid level float is placed in the square hole of electronics oil level gauge, the float profile is round, and the centre has small square hole, is fixed with a thin copper band on the float cylindrical, and, constitute two electric contacts at outstanding two lugs of 180 ° of directions.
Electronics oil level gauge and liquid level float are placed in the corrosion-resistant steel long tube, just become the integral type level sensor, is welding and the fixing flange of fuel tank the long tube upper end, central vertical is being laid a thin square shaft in the pipe, the bottom of square shaft is drilled with aperture, be enclosed within on the thimble seat of long tube bottom, the liquid level float is enclosed within on the thin square shaft, in the steel pipe of the flange upper end of long tube, one " swing motor " also is installed, it is by magnetic pole of the stator, rotor, magnet coil is formed, and it provides 45 ° rotation torsion for float, makes float contacting or cut off, be evenly distributed with aperture on the tube wall of long tube in fuel tank, so that the inside and outside liquid level equilibrium of pipe, the long tube upper end is provided with end cap, in case rainwater enters.
Input circuit is by resistance R
4, R
5, adjustable resistance W
1, and resistance R
6, V-is in series, resistance R wherein
4An end be connected with positive pole of stabilized voltage supply, the other end is connected with the upper end of level sensor through socket, for level sensor provides one 4 volts voltage, copper sheet on the contact on the liquid level float and the electronics oil level gauge and line scratch that resistive band contacts and the liquid level voltage signal that produces through socket and resistance R
5→ adjustable resistance W
5→ resistance R
6→ V-series connection is with at adjustable resistance W
1On obtain 1/20 voltage signal, this voltage signal is through functional select switch K
2A2→ resistance R
15→ deliver in the analog-to-digital conversion circuit to IN+, through on telltale, demonstrating oil mass litre number in the fuel tank after the digital to analogy conversion.
The level sensor vertical lifting on the overall length of resistive band, exists the incremental voltage of 0-4 volt at the middle part of fuel tank from bottom to top; The liquid level float floats on the pasta all the time, and electric contact is concordant with pasta, and electric contact is communicated with resistive band and copper sheet, sends the liquid level voltage signal of this height, through W
A2→ socket A
2→ R
5→ W
1→ R
6→ V-finishes, from W
1The oil mass analog signal that the adjusting back obtains is through K
2A2Enter A/D converter IN+, carry out A/D, output digital pen dash signal demonstrates the oil mass numeral on telltale.
Also can obtain other oil tank fuel amount numeral with the same manner.
But the Liquid Crystal Display (LCD) described in the utility model technical solution is display automobile battery charge voltage digital also, with 24 overhead accumulator voltages through socket D
1→ R
2→ R
3After → V-the dividing potential drop in resistance R
2With R
3Between obtain one 1/1000 charging valtage, again through functional select switch K
2A1→ resistance R
15After → IN+ carries out digital to analogy conversion, demonstrate the charging-voltage of automobile accumulator cell numeral.
But the Liquid Crystal Display (LCD) described in the utility model technical solution is display automobile Engine Coolant Temperature numeral also, adopts LM35 type integrated temperature sensor, and water temperature signal is through socket C
2→ resistance R
10→ R
11After → V-the dividing potential drop, from resistance R
10→ functional select switch K
2A4→ resistance
15→ IN+ carries out digital to analogy conversion, shows the water temperature numeral.
Also be provided with fuel tank ponding reminiscences in the utility model technical solution, the lower end of level sensor is mounted with a little copper sheet in fuel tank, and copper sheet is by socket and resistance R
19→ V
+Series connection, copper sheet is generally high potential, when ponding touches copper sheet in the fuel tank, IC
3bThe input end saltus step is an active potential, and the ponding reminiscences is reported to the police.
The utility model is owing to adopted analog-to-digital conversion circuit and Liquid Crystal Display (LCD), adopted the high level sensor of resolution again, therefore, the amount of fuel in the fuel tank can be reflected in the driver at the moment at any time, no matter is that oil dropping apparatus refuels or in the driving way driver known what's what.
Describe the utility model embodiment in detail below in conjunction with accompanying drawing:
Fig. 1 is the utility model functional-block diagram;
Fig. 2 is one of a utility model level sensor structural front view;
Fig. 3 is one of the utility model level sensor structure birds-eye view;
Fig. 4 is two structural front view of the utility model level sensor;
Fig. 5 is two A-A cutaway views of the utility model level sensor;
Fig. 6 is two B-B cutaway views of the utility model level sensor;
Fig. 7 is the utility model schematic circuit diagram;
Fig. 8 be the utility model level sensor two in swing motor circuit figure.
Among Fig. 1: level sensor 1 is connected with input circuit 2 through socket 6A, input circuit 2 is connected with analog-to-digital conversion circuit 3 and Liquid Crystal Display (LCD) 4 through functional select switch 9 again, constant voltage power suspply 5 and input circuit 2, analog-to-digital conversion circuit 3 connects, use offering instrument after the voltage stabilizing of automotive battery voltage, whole instrument adopts single power supply, and power cathode (bonding) is shared.
Water temperature socket 7 and other fuel tank socket 6B insert in the input circuit 2 equally, and ponding reminiscences 8 is provided with in addition.
Fig. 2, among Fig. 3: level sensor is provided with along the fuel tank height, bolt 16 on the electronics oil level gauge 10 is connected with the screw on the fuel tank, being enclosed within on the electronics oil level gauge 10 of oblong aperture activity opened in liquid level float 11 centres, float 11 is answered up and down freedom, resistive band 13 on contact 12 and the electronics oil level gauge 10, copper sheet 14 contacts are good, resistive band 13 is key elements of record oil mass, it is at long 40 centimetres, wide 1.5-20 centimetre, on the thick 1 millimeter insulating tape, form with 0.15 millimeter the resistor wire system of scratching, with 20 * 400 millimeters resistive bands 13,20 * 400 millimeters copper sheet bonds on the insulation rod 15 in II type cross section on two planes that fall in relatively, under the situation of 4 volts of terminal voltages, electronics oil level gauge 10 can produce 800 voltage gradations, the oil level float swims on the pasta all the time, changing up and down at any time by the contact on the float 12 of oil level contacts with resistive band 13 and copper sheet 14 on the electronics oil level gauge 10, produce different voltage signals according to the height of oil level and reflect, its resolution can reach 0.25 liter.
Among Fig. 4, Fig. 5, Fig. 6: electronics oil level gauge 23 is installed in the corrosion-resistant steel long tube 21, the cross section of electronics oil level gauge 23 is round outside but spuare inside, on two relative planes of interior square hole, be bonded with 20 * 400 millimeters resistive band 24 and 20 * 400 millimeters copper sheet 25 respectively, on other two planes, be evenly distributed with aperture, liquid level float 29 is placed in the square hole of electronics oil level gauge 23, the float profile is round, there is a small square hole at the center, be fixed with a thin copper band on the cylindrical, and, constitute two electric contacts 30 at outstanding two lugs of 180 ° of directions.A thin square shaft 27 is vertically being laid in long tube 21 centers, the bottom of square shaft 27 is drilled with aperture, be enclosed within on the thimble seat 28 of long tube 21 inner bottom parts, the center small square hole of liquid level float 29 just in time is enclosed within on the thin square shaft 27, float should be up and down freely, one circular stator magnetic ring 31 and magnet coil 32 also is housed in the upper end of long tube 21, rotor on the coil 32 is sleeved on the top of thin square shaft 27, and fix with screw, the flange 22 that docks with fuel tank is being welded in cylindrical upper end at long tube 21, be evenly distributed with aperture on the tube wall of long tube in fuel tank, so that the oil in the fuel tank can enter in the long tube, make the outer pasta of Guan Liguan equate that the long tube upper end is provided with end cap 34, also be provided with a little copper sheet 26 in the lower end of electronics oil level gauge 23, as the sensor of ponding reminiscences 8.
The oil level float is limit because of the position, design volume is less, its buoyancy is also little, so being contained in electric contact 30 on the float can not contact with copper sheet 25 with resistive band 24 when flat, it must be in free state, just can make float moving with oil float, has only when needs detect oil mass, the ability switch on, magnet coil 32 energisings, rotor 32 is magnetized, and the upper end is the S utmost point, the lower end is the N utmost point, according to the principle that the same sex is inhaled mutually, rotor is attracted by the N utmost point, swings 45 °, at this moment square shaft drives float and also rotates 45 °, and the electric contact 30 on the float is connected (24)-(25) output oil level signal.
After end of test (EOT), the magnet coil outage, the rotor loss of excitation under the application force of pull back spring, makes its return, rests between N, the S utmost point, and is attracted, and float is also driven return by square shaft, and contact 30 is unsettled.
Fig. 7 is the utility model schematic circuit diagram, and what Liquid Crystal Display (LCD) and analog-digital converter adopted is the digital voltage watch circuit of using always, and input circuit is by resistance R
4, R
5, adjustable resistance W
1And resistance R
6, V-is in series, resistance R wherein
4An end be connected with positive pole of stabilized voltage supply, the other end is through socket A
1With level sensor W
AThe upper end connect lower end W
A3→ W
2→ V-is level sensor W
AProvide one 4 volts terminal voltage, the detected oil level voltage signal of liquid level float W
A2Again through socket A
2With resistance R
5→ adjustable resistance W
1→ resistance R
6→ V-series connection is with at adjustable resistance W
1On obtain 1/20 voltage signal, this voltage signal is through functional select switch K
2A2→ resistance R
15→ IN+ delivers to analog-to-digital conversion circuit IC
2In, through on telltale, demonstrating the litre number of oil mass in the fuel tank after the digital to analogy conversion.W
2Setting be usefulness for the adjustment of low side oil mass location.
The same manner also can obtain oil mass numeral in the B fuel tank.
Whole instrument adopts single power supply, and power cathode V-(bonding) is shared, by 9 volts of vdc V+ of constant voltage power suspply output through R
13→ W
5→ R
12The bleeder of → composition is at w
5Regulate the voltage that back can obtain 100wv, through R
17Enter IC
2, VREF+ is as the reference voltage of instrument, makes telltale become the digital voltmeter of 200MV, at R
15The last input of → IN+ 1mv voltage signal both can show 1.0 numerals, and maximum demonstration numeral is 199.9.
24 overhead accumulator voltages are through circuit series D
1→ R
2→ R
3After → V-the dividing potential drop in resistance R
2With R
3Between obtain one 1/1000 voltage, again through functional select switch K
2A1→ resistance R
15→ IN
+Carry out digital to analogy conversion.The back demonstrates the charging-voltage of automobile accumulator cell numeral on telltale.
Automobile engine water temperature is measured and is adopted LM
35The type integrated temperature sensor, water temperature signal IC
42Through socket C
2→ resistance R
10→ R
11After → V-the dividing potential drop, from resistance R
10→ functional select switch K
2A4→ resistance R
15→ IN+ carries out digital to analogy conversion, and telltale demonstrates the water temperature numeral.
The lower end of level sensor also is provided with a little copper sheet 26 in fuel tank, and it carries Huan's device IG for fuel tank ponding
3Sensor, copper sheet is by socket B
4With resistance R
19→ V+ series connection is generally high potential, and when ponding touched copper sheet in the fuel tank, the input end saltus step was a low voltage, ponding reminiscences IC
3Starting of oscillation is sounded a buzzer.
Fig. 8 be the utility model level sensor 2 in swing motor circuit figure, in order not make telltale voltage of voltage regulation fluctuation, the swing motor adopts independent supply line, 24 volts positive poles are through D socket 1 → series connection dropping resistor → F file protect → K
2CFunction selecting key → A
LOr D
LMagnet coil → V-gives the swing electrical power, and other has the LED light-emitting diode, is A
LOr B
LRelay indicating light.
Claims (8)
1, a kind of fuel tank of vehicle numeral metering device, it is characterized in that: it is made up of level sensor (1), input circuit (2), analog-to-digital conversion circuit (3) and Liquid Crystal Display (LCD) (4), functional select switch (9) and constant voltage power suspply (5); Level sensor (1) is installed in the fuel tank along the fuel tank short transverse, is made up of the liquid level float of contact-carrying and electronics oil level gauge; Level sensor (1) is connected with input circuit (2), and pass through functional select switch (9) and connect with analog-to-digital conversion circuit (3) and Liquid Crystal Display (LCD) (4), input circuit (2) converts the last detected liquid level voltage signal of level sensor (1) to numeral through analog-to-digital conversion circuit (3) and delivers to demonstration in the Liquid Crystal Display (LCD) (4).
2, fuel tank of vehicle numeral metering device according to claim 1, the electronics oil level gauge (10) that it is characterized in that level sensor (1) can be on the insulation rod in II type cross section two fall in relatively and copper sheet (14) be installed respectively on the plane and line is scratched resistive band (13), liquid level float (11) centre has being enclosed within on the electronics oil level gauge (10) of oblong aperture activity, the corresponding both sides of float endoporus are equipped with two electric contacts (12), contact with copper sheet (14) and resistive band (13) on the electronics oil level gauge (10) respectively; The upper end of electronics oil level gauge (10) is provided with bolt (16), can be connected with the screw on the fuel tank.
3, fuel tank of vehicle numeral metering device according to claim 1, the electronics oil level gauge (23) that it is characterized in that level sensor (1) can also be on the cross section is the endoporus two relative planes of round outside but spuare inside insulation rod, load onto copper sheet (25) and resistive band (24) respectively, be drilled with several holes on two planes in addition, liquid level float (29) is placed in electronics oil level gauge (23) square hole, float (29) profile is round, the centre has small square hole, be fixed with a thin copper band (30) on the cylindrical and, constitute two electric contacts at outstanding two lugs of 180 ° of directions.
4, fuel tank of vehicle numeral metering device according to claim 3, it is characterized in that electronics oil level gauge (23) is placed in the corrosion-resistant steel long tube (21), is welding and the fixing flange (22) of fuel tank long tube (21) upper end, vertically laying a thin square shaft (27) in long tube (21) center, the bottom of square shaft (27) is drilled with aperture, be enclosed within on the thimble seat (28) of long tube (21) bottom, liquid level float (29) is enclosed within on the thin square shaft (27), in the steel pipe of the flange upper end of long tube (21), one stator magnet ring (31) and magnet coil and rotor (32) are installed, and be fixed on the long tube with screw, be evenly distributed with aperture on the tube wall of long tube (21) in fuel tank, so that the fuel oil energy in the fuel tank advances in the long tube, long tube (21) upper end is provided with end cap (34).
5, fuel tank of vehicle numeral metering device according to claim 1 is characterized in that input circuit is by resistance R
4, R
5, adjustable resistance W
1And resistance R
6, V-is in series, resistance R wherein
4Anodal connection of an end and constant voltage power suspply (5), the other end passes through socket A
1Upper end WA with level sensor (1)
1Connect, for level sensor (1) provides 4 volts of vdcs of a regulation, liquid level signal WA
2Again through socket A
2With resistance R
5→ adjustable resistance W
1→ resistance R
6→ V-series connection is with at adjustable resistance W
1On obtain 1/20 voltage, the voltage of this 0-200mv is through functional select switch (9) K
2A2, resistance R
15Deliver in the analog-to-digital conversion circuit (3) to IN+, through on telltale, demonstrating the numeral of 0-200 litre after the digital to analogy conversion.
6, fuel tank of vehicle according to claim 1 numeral metering device is characterized in that Liquid Crystal Display (LCD) (4) but display automobile battery charge voltage digital also, and it is through circuit series D with 24 overhead accumulator voltages
1→ R
2→ R
3After → V-the dividing potential drop at R
2→ R
3Between obtain one 1/1000 voltage, again through functional select switch (9) K
2A1→ resistance R
15After changing, → IN+ demonstrates the automotive battery voltage digital.
7, fuel tank of vehicle according to claim 1 numeral metering device is characterized in that Liquid Crystal Display (LCD) (4) but display automobile Engine Coolant Temperature numeral also, and it is to adopt LM
35The type integrated temperature sensor, water temperature signal IC
4-2Through socket C
2→ R
10→ R
11After → V-the dividing potential drop, from R
10→ K
2A4→ R
15→ IN+ carries out digital to analogy conversion, shows the water temperature numeral.
8, fuel tank of vehicle numeral metering device according to claim 1 is characterized in that the lower end of level sensor (1) is provided with a little copper sheet (26), and it is the sensor of fuel tank ponding reminiscences (8), copper sheet and socket A
4→ R
19→ V
+Series connection; Be generally high potential, when ponding touched copper sheet in the fuel tank, the input end saltus step was a low voltage, and ponding reminiscences (8) sends beep sound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00266192 CN2456947Y (en) | 2000-12-29 | 2000-12-29 | Digital meter of automobile fuel tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00266192 CN2456947Y (en) | 2000-12-29 | 2000-12-29 | Digital meter of automobile fuel tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2456947Y true CN2456947Y (en) | 2001-10-31 |
Family
ID=33620334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00266192 Expired - Fee Related CN2456947Y (en) | 2000-12-29 | 2000-12-29 | Digital meter of automobile fuel tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2456947Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102848903A (en) * | 2012-09-06 | 2013-01-02 | 浙江吉利汽车研究院有限公司杭州分公司 | Fuel tank with water inlet detection function and detection method implemented by fuel tank |
| CN103278202A (en) * | 2013-06-10 | 2013-09-04 | 李良杰 | Oil charging quantity monitoring device |
| CN110146143A (en) * | 2019-05-13 | 2019-08-20 | 江苏理工学院 | A kind of oil-level measurement system based on Hall effect |
| CN111928917A (en) * | 2020-07-06 | 2020-11-13 | 西安飞机工业（集团）有限责任公司 | Method for improving aircraft fuel measurement precision |
-
2000
- 2000-12-29 CN CN 00266192 patent/CN2456947Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102848903A (en) * | 2012-09-06 | 2013-01-02 | 浙江吉利汽车研究院有限公司杭州分公司 | Fuel tank with water inlet detection function and detection method implemented by fuel tank |
| CN102848903B (en) * | 2012-09-06 | 2016-07-06 | 浙江吉利汽车研究院有限公司杭州分公司 | A kind of fuel tank having into water detection function and detection method thereof |
| CN103278202A (en) * | 2013-06-10 | 2013-09-04 | 李良杰 | Oil charging quantity monitoring device |
| CN110146143A (en) * | 2019-05-13 | 2019-08-20 | 江苏理工学院 | A kind of oil-level measurement system based on Hall effect |
| CN111928917A (en) * | 2020-07-06 | 2020-11-13 | 西安飞机工业（集团）有限责任公司 | Method for improving aircraft fuel measurement precision |
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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 |