CN2395258Y - Electronic fuel display for automobile - Google Patents
Electronic fuel display for automobile Download PDFInfo
- Publication number
- CN2395258Y CN2395258Y CN 99234022 CN99234022U CN2395258Y CN 2395258 Y CN2395258 Y CN 2395258Y CN 99234022 CN99234022 CN 99234022 CN 99234022 U CN99234022 U CN 99234022U CN 2395258 Y CN2395258 Y CN 2395258Y
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- circuit
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Abstract
The utility model relates to an electronic oil mass display for an automobile. The utility model is composed of a signal collecting circuit 1, a capacitance voltage (C/V) converting circuit 2, an analog-to-digital (A/D) converting circuit 3, a center processing circuit 4, a display driving circuit 5, and a power supply circuit 6, wherein, the signal collecting circuit 1, the capacitance voltage (C/V) converting circuit 2, the analog-to-digital (A/D) converting circuit 3, the center processing circuit 4, the display driving circuit 5, and the power supply circuit 6 are orderly connected in series; the input terminal of the power supply circuit 6 is connected with external power supply in plus 12 V, and the output terminal of the power supply circuit 6 respectively provides working power supply for every part. The utility model has the advantages of simple and reasonable structure, easy process and production, convenient use, and high precision and has the advantage that the qualitative indication of an indicator for oil mass of the automobile is changed to quantitative display.
Description
The utility model relates to a kind of liquid meter display device, is meant a kind of electronic vehicle fuel monitor especially.
General automobile oil mass indicator, employing be float-type transmitter, pot is handled in the lifting by pasta, and its resistance is changed, thereby changes output signal voltage for indicator indication Fuel Oil Remaining.Its principle of work of the oil quantity indicator of this structure is to depend in the fuel tank oil mass to change that to change with fuel head be linear relationship; But because structure, the features of shape of automotive oil tank, the variation of oil mass in the fuel tank is not directly proportional with the variation of fuel head, be that the upper and lower part is non-linear and center section is linear, this does not just purchase mutually with the operating characteristic of existing automobile oil mass indicator and closes, therefore, existing automobile oil mass indicator only can reflect the variation (promptly expiring oil mass, 1/2 case oil mass) of fuel tank fuel quantity roughly, and index error is bigger, can only be as the reference of oil mass variation.
The purpose of this utility model be to overcome the deficiency of prior art and provide a kind of simple and reasonable for structure, pointing accuracy is high, can quantitatively show the electronic vehicle fuel monitor of fuel tank Fuel Oil Remaining.
The utility model is to adopt following proposal to realize: it is made up of signal acquisition circuit 1, capacitance voltage (C/V) change-over circuit 2, analog to digital conversion (A/D) circuit 3, center processing circuit 4, display driver circuit 5, power circuit 6, described signal acquisition circuit 1, capacitance voltage (C/V) change-over circuit 2, analog to digital conversion (A/D) circuit 3, center processing circuit 4, display driver circuit 5 are connected in series successively, input termination+12V the external power supply of power circuit 6, output provides working power to each several part respectively.
Concrete structure of the present utility model describes in detail below in conjunction with accompanying drawing:
Accompanying drawing 1 is the utility model electricity theory diagram.
Accompanying drawing 2,3,4 is the utility model electrical schematic diagram.
See accompanying drawing 1,2,3, the utility model is made up of signal acquisition circuit 1, capacitance voltage (C/V) change-over circuit 2, analog to digital conversion (A/D) circuit 3, center processing circuit 4, display driver circuit 5, power circuit 6, described signal acquisition circuit 1, capacitance voltage (C/V) change-over circuit 2, analog to digital conversion (A/D) circuit 3, center processing circuit 4, display driver circuit 5 are connected in series successively, input termination+12V the external power supply of power circuit 6, output provides working power to each several part respectively; And signal acquisition circuit 1 is by variable capacitance C
xForm, capacitance voltage (C/V), change-over circuit 2 are by ic chip
7, capacitor C
21-C
27, resistance R
31-R
42, W
3, W
2, constant pressure source Q forms, and modulus (A/D) change-over circuit 3 is by ic chip
1, resistance R
1-R
4, W
1, capacitor C
1-C
5, C
14, crystal oscillator T
1Form, center processing circuit 4 is by ic chip
2, resistance R
5, capacitor C
6-C
9, push switch S
1, crystal oscillator T
2Form, display driver circuit 5 is by ic chip
3, IC
4, resistance R
6-R
14Form, power circuit 6 is by ic chip
5, IC
6, coupling mechanism M, capacitor C
10-C
13Form.
The integrated package model is in the utility model:
IC1：7109 IC2：89C51 IC3、IC4：7407
IC5：7660 IC6：7805 IC7：7556
Coupling mechanism M:ZSIR5 constant pressure source Q:LM385-2.5
Principle of work of the present utility model is sketched in following:
With the variable capacitance C in the signal acquisition circuit 1
xDesign of length equate with the automotive oil tank height, and be installed in the fuel tank, and with the fuel tank geometric characteristic through precision calculate become mathematical model after programming roast ic chip in center processing circuit 4
2In, for revising oily level and Fuel Oil Remaining error.In fuel tank, when oily level changes, variable capacitance C
xCapacity changes, the ic chip of its output signal in the C/V change-over circuit
7Convert voltage signal to and export IC in the A/D change-over circuit to
1, this signal is again through ic chip
2In handle, and be fixedly arranged on after Oiltank structure characteristic parameter in it relatively revises, export ic chip in the display driver circuit to
3, IC
4, driving display shows real surplus oil mass in the fuel tank, reaches the instant purpose that accurately shows Fuel Oil Remaining in the fuel tank.
In the utility model, IC
6Be three terminal regulator, its function for automobile is equipped with+voltage stabilizing of 12V power supply for+5V power supply for each several part work, the effect of coupling mechanism M is that center processing circuit work power and automobile power source are cut off, and prevents interference, ic chip
5Be to ic chip
1One reference voltage is provided; Knob S
1Effect be to realize oil mass in clear " zero " and the instant playback fuel tank.
The utility model is owing to adopt said structure, can accurately revise the nonlinear relationship between the fuel head and Fuel Oil Remaining in the fuel tank, realizes accurately showing the purpose of Fuel Oil Remaining in the fuel tank.
In sum, the utility model is simple and reasonable, and processing and manufacturing is easy, and is easy to use, and what change existing automobile oil mass indicator qualitatively is designated as quantitative demonstration, and the precision height is suitable for suitability for industrialized production, can be used as the renewal product of existing automobile oil mass indicator.
Claims (1)
- The electronic vehicle fuel monitor, form by signal acquisition circuit (1), capacitance voltage (C/V) change-over circuit (2), analog to digital conversion (A/D) circuit (3), center processing circuit (4), display driver circuit (5), power circuit (6), it is characterized in that described signal acquisition circuit (1), capacitance voltage (C/V) change-over circuit (2), analog to digital conversion (A/D) circuit (3), center processing circuit (4), display driver circuit (5) are connected in series successively, input termination+12V the external power supply of power circuit (6), output provides working power to each several part respectively; And signal acquisition circuit (1) is by variable capacitance C xForm, capacitance voltage (C/V) change-over circuit (2) is by ic chip 7, capacitor C 21-C 27, resistance R 31-R 42, W 3, W 2, constant pressure source Q forms, and modulus (A/D) change-over circuit (3) is by ic chip 1, resistance R 1-R 4, W 1, capacitor C 1-C 5, C 14, crystal oscillator T 1Form, center processing circuit (4) is by ic chip 2, resistance R 5, capacitor C 6-C 9, push switch S 1, crystal oscillator T 2Form, display driver circuit (5) is by ic chip 3, IC 4, resistance R 6-R 14Form, power circuit (6) is by ic chip 5, IC 6, coupling mechanism M, capacitor C 10-C 13Form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99234022 CN2395258Y (en) | 1999-09-08 | 1999-09-08 | Electronic fuel display for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99234022 CN2395258Y (en) | 1999-09-08 | 1999-09-08 | Electronic fuel display for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2395258Y true CN2395258Y (en) | 2000-09-06 |
Family
ID=34022290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99234022 Expired - Fee Related CN2395258Y (en) | 1999-09-08 | 1999-09-08 | Electronic fuel display for automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2395258Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101551264B (en) * | 2009-04-28 | 2011-01-05 | 哈尔滨威帝电子股份有限公司 | Capacitance electronic type fuel sensor |
-
1999
- 1999-09-08 CN CN 99234022 patent/CN2395258Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101551264B (en) * | 2009-04-28 | 2011-01-05 | 哈尔滨威帝电子股份有限公司 | Capacitance electronic type fuel sensor |
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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 |