CN109540254A - A kind of fuel oil for vehicles overmeasure computation method based on voltage ratio - Google Patents
A kind of fuel oil for vehicles overmeasure computation method based on voltage ratio Download PDFInfo
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- CN109540254A CN109540254A CN201811178496.6A CN201811178496A CN109540254A CN 109540254 A CN109540254 A CN 109540254A CN 201811178496 A CN201811178496 A CN 201811178496A CN 109540254 A CN109540254 A CN 109540254A
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- voltage
- sensor
- fuel oil
- vehicles
- resistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/24—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of resistance of resistors due to contact with conductor fluid
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Level Indicators Using A Float (AREA)
Abstract
The present invention relates to a kind of fuel oil for vehicles overmeasure computation method based on voltage ratio, including processor, sensor and drive module；The processor setting voltage output interface, control signal output interface and voltage input interface；The sensor is provided with the third interface of the first interface connecting with the voltage output interface, the second interface connecting with the voltage input interface and ground connection；Described drive module one end is connect with the control signal output interface, and the drive module other end is connected on the voltage input interface and the second interface circuit.The beneficial effect is that: (1) it is not required to increase hardware cost；(2) acquisition precision of sensor resistance is greatly improved；(3) it saves resistance and goes calibration link, improve production efficiency；(4) long-term stable operation is not easy to it by sensor contacts Resistance Influence.
Description
Technical field
The present invention relates to vehicle technology field, in particular to a kind of fuel oil for vehicles surplus calculating side based on voltage ratio
Method.
Background technique
Fuel oil for vehicles surplus is detected, the internal slide rheostat for generalling use fuel sensor is acquired calculating, extensively
The internal slide rheostat of the fuel sensor used in automobile industry, after prolonged use, due to making for mechanical contact
With abrasion and electrochemical reaction, it will cause contact resistance and become larger, influence the collection result of fuel oil.In order to reduce contact resistance
It influences, industry calculates contact resistance using the method for compensation acquisition, and contact resistance is subtracted in calculated result, finds out combustion indirectly
The resistance value of oil sensor.During calculating contact resistance and fuel oil resistance, to probe power, divider resistance, number are pulled up
Mode converter reference voltage required precision is very high, and product cost is caused to rise, since itself is by power supply and reference voltage
Precision, practical checkout result precision be not high.In actual application, the conductor resistance of fuel sensor also can be considered as passing
Sensor resistance is to increase acquisition deviation；In production process, to reduce systematic error, it is also necessary to carry out resistance calibration operation.
Summary of the invention
In order to solve the above technical problems, The present invention provides include processor, sensor and drive module；It is described
Processor includes reference voltage input terminal Vin, control signal output Ctl and probe power voltage acquisition end Vs；The biography
What sensor was provided with and connect the power output end of Vin with the reference voltage input terminal, connect with the drive module output end
Power input and the ground terminal of ground connection；The drive module 3 further includes connecting with the control signal output interface Ctl
Enable end, probe power voltage acquisition end Vs connect with the power input of the sensor.
Further, the drive module includes triode, the base stage of the triode and the control signal output
Ctl connection, emitter are connected on probe power voltage acquisition end Vs and the power input, collector and VCC
Circuit connection.
Further, the first divider resistance R1 is concatenated between the processor and the base stage of the triode.
Further, filtering is additionally provided between the drive module output end and probe power voltage acquisition end
Circuit.
Further, the filter circuit includes the second divider resistance R2 and capacitor C, the both ends of second divider resistance
It is separately connected the drive module output end and probe power voltage acquisition end；Wherein the one of second divider resistance
End is also grounded by the capacitor C.
In addition, the present invention also provides a kind of fuel oil for vehicles overmeasure computation method based on voltage ratio, comprising the following steps:
The first interface of sensor is connect the voltage output end in processor by S1；
S2 acquires the voltage digital quantity AD of first interfacein；
S3, the voltage digital quantity AD of Acquisition Processor voltage input ends；
The fuel oil ratio r of S4, the sensor resistance and oil mass is equal to the ADinAnd ADsRatio；
S5 compares the relation table of sensor resistance and fuel tank fuel quantity, seeks oil mass according to fuel oil ratio r.
Further, the calculation formula of fuel oil ratio r are as follows:。
Further, the first interface is arranged in the sensor tap, the sensor tap and fuel tank liquid level
Positioned at same horizontal line.
Further, there are in the processor of instrument for the relation table of sensor resistance and fuel tank fuel quantity.
Further, in the step S4, the sensor resistance is the sliding electricity that the sensor internal is arranged in
Hinder the resistance of device.
A kind of fuel oil for vehicles surplus counting circuit based on voltage ratio of the invention, avoids conventional Christmas, calculation method
The error of middle introducing avoids electrical resistance collection from not influenced by supply voltage precision, expands the application scenarios of electrical resistance collection, is not required to
Increase high-precision reference voltage source and acquisition precision is higher.In the case where guaranteeing that sampling pull-up resistor precision is certain, keep away
Exempt to design and produce link progress resistance calibration；The beneficial effect is that: (1) it is not required to increase hardware cost；(2) biography is greatly improved
The acquisition precision of sensor resistance；(3) it saves resistance and goes calibration link, improve production efficiency；(4) not by sensor contacts resistance shadow
It rings, is easy to long-term stable operation.
Detailed description of the invention
Fig. 1 is the calculation flow chart of the embodiment of the present invention 2；
Fig. 2 is the transmission circuit diagram of the embodiment of the present invention 3；
Fig. 3 is the sensor resistance and oil mass relation table that the present invention implements 3.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, so that advantages and features of the invention are more
It is easily readily appreciated by one skilled in the art, to make apparent define to protection scope of the present invention.
Embodiment 1:
As shown in Figure 1-3, the present invention provides a kind of fuel oil for vehicles surplus counting circuit based on voltage ratio, including processor
1, sensor 2 and drive module 3；The processor 1 include reference voltage input terminal Vin, control signal output Ctl and
Probe power voltage acquisition end Vs；The sensor 2 is provided with the power supply output that Vin is connect with the reference voltage input terminal
The ground terminal at end, the power input being connect with the drive module output end and ground connection；The drive module 3 further includes
The enable end being connect with the control signal output interface Ctl, the electricity of probe power voltage acquisition end Vs and the sensor
The connection of source input terminal；By detecting the voltage of reference voltage input terminal Vin and the electricity of probe power voltage acquisition end Vs
Pressure, acquires the fuel oil ratio for stating sensor resistance and oil mass, searches sensor resistance and oil mass relation table by fuel oil ratio, can
Obtain current fuel tank fuel quantity numerical value.
Embodiment 2:
Based on embodiment 1, the present invention also provides a kind of fuel oil for vehicles surplus counting circuit based on voltage ratio, further
, the drive module 3 includes triode, and the base stage of the triode is connect with the control signal output Ctl, emitter
It is connected on probe power voltage acquisition end Vs and the power input, collector and VCC circuit connection；Processor
The connecting and disconnecting of the circuit of sensor is controlled by triode, is reduced depletion sensor, is further played a protective role to sensor.
Further, the first divider resistance R1 is concatenated between the processor and the base stage of the triode.
Further, filtering is additionally provided between the drive module output end and probe power voltage acquisition end
Circuit；The filter circuit includes the second divider resistance R2 and capacitor C, and the both ends of second divider resistance are separately connected described
Drive module output end and probe power voltage acquisition end；Wherein one end of second divider resistance also passes through described
Capacitor C ground connection.
Embodiment 3:
In addition, the present invention also provides a kind of fuel oil for vehicles overmeasure computation method based on voltage ratio, passes through and calculates sensor
The ratio of supply voltage and the voltage of reference, extrapolates the resistance value of sensor, and then seeks remaining fuel of fuel tank, and this method is drawn
Enter supply voltage Us and reference voltage Uref calculated:
... (formula 1)
Wherein, R1For total resistance value of sensor slide rheostat, RxFor the current resistance value of sensor slide rheostat, UinProcessor
Output voltage and first interface input voltage, UsFor processor input voltage and first interface output voltage；
... (formula 2)
Wherein, ADinIt is power source reference for processor output voltage digital value and first interface input voltage digital value, Uref
Voltage.
By formula 1, formula 2 can derive the calculation formula of Rx: ... (formula 3) passes through RxIt is inquired and compares sensor
The relation table of resistance and fuel tank fuel quantity seeks current fuel tank fuel quantity.
In above-mentioned calculating, Uref and U need to be acquireds, wherein supply voltage Us can pass through output voltage values ADsAnd reference power source
Voltage Uref is calculated... (formula 4)；It can derive... (formula
5) it, and then obtains, specific implementation step is as follows:
The first interface of sensor is connect the voltage output end in processor by S1；
S2 acquires the voltage digital quantity AD of first interfacein；
S3, the voltage digital quantity AD of Acquisition Processor voltage input ends；
The fuel oil ratio r of S4, sensor resistance and oil mass is equal to ADinAnd ADsRatio；
S5 compares the relation table of sensor resistance and fuel tank fuel quantity, seeks oil mass according to fuel oil ratio r.
Further, the calculation formula of fuel oil ratio r are as follows:, as shown in figure 3, Fig. 3 is that vehicle vehicle surveys number
According to a beautiful vehicle has corresponding sensor resistance and oil mass relational graph, and in a certain situation, calculating ratio sensor output is
0.23, then the Fuel Remained that counter can release fuel tank is 30L.
Further, first interface is arranged in sensor tap, and sensor tap and fuel tank liquid level are located at same level
Line.
Further, there are in the processor of instrument for the relation table of sensor resistance and fuel tank fuel quantity.
Further, in step s 4, sensor resistance is the resistance that the slide resistor of sensor internal is arranged in.
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode within the knowledge of a person skilled in the art can also be without departing from the purpose of the present invention
Various changes can be made.
Claims (10)
1. a kind of fuel oil for vehicles surplus counting circuit based on voltage ratio, it is characterised in that: including processor (1), sensor
(2) and drive module (3)；The processor (1) includes reference voltage input terminal (Vin), control signal output (Ctl)
With probe power voltage acquisition end (Vs)；The sensor (2), which is provided with, connect (Vin) with the reference voltage input terminal
The ground terminal of power output end, the power input being connect with the drive module output end and ground connection；The drive module
It (3) further include the enable end being connect with control signal output interface (Ctl), probe power voltage acquisition end (Vs) and institute
State the power input connection of sensor.
2. a kind of fuel oil for vehicles surplus counting circuit based on voltage ratio according to claim 1, which is characterized in that institute
Stating drive module (3) includes triode, and the base stage of the triode is connect with the control signal output (Ctl), emitter
It is connected on probe power voltage acquisition end (Vs) and the power input, collector and VCC circuit connection.
3. a kind of fuel oil for vehicles surplus counting circuit based on voltage ratio according to claim 2, which is characterized in that institute
It states and concatenates the first divider resistance (R1) between processor and the base stage of the triode.
4. a kind of fuel oil for vehicles surplus calculating current based on voltage ratio according to claim 2, which is characterized in that institute
It states and is additionally provided with filter circuit between drive module output end and probe power voltage acquisition end.
5. a kind of fuel oil for vehicles surplus counting circuit based on voltage ratio according to claim 2, which is characterized in that institute
Stating filter circuit includes that the second divider resistance (R2) and capacitor C, the both ends of second divider resistance are separately connected the driving
Module output end and probe power voltage acquisition end；Wherein one end of second divider resistance also passes through the capacitor
(C) it is grounded.
6. a kind of fuel oil for vehicles overmeasure computation method based on voltage ratio, which comprises the following steps:
The first interface of sensor is connect the voltage output end in processor by S1；
S2 acquires the voltage digital quantity AD of first interfacein；
S3, the voltage digital quantity AD of Acquisition Processor voltage input ends；
The fuel oil ratio (r) of S4, the sensor resistance and oil mass is equal to the ADinAnd ADsRatio；
S5 compares the relation table of sensor resistance and fuel tank fuel quantity, seeks oil mass according to fuel oil ratio (r).
7. a kind of fuel oil for vehicles overmeasure computation method based on voltage ratio according to claim 6, which is characterized in that
In the step S4, the calculation formula of fuel oil ratio (r) are as follows:。
8. a kind of fuel oil for vehicles overmeasure computation method based on voltage ratio according to claim 6, which is characterized in that institute
It states first interface to be arranged in the sensor tap, the sensor tap and fuel tank liquid level are located at same horizontal line.
9. a kind of fuel oil for vehicles overmeasure computation method based on voltage ratio according to claim 5, which is characterized in that also
Including the storage element for storage sensors resistance and the relation table of fuel tank fuel quantity.
10. a kind of fuel oil for vehicles overmeasure computation method based on voltage ratio according to claim 6, which is characterized in that
In the step S4, the sensor resistance is the resistance that the slide resistor of the sensor internal is arranged in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811178496.6A CN109540254A (en) | 2018-10-10 | 2018-10-10 | A kind of fuel oil for vehicles overmeasure computation method based on voltage ratio |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811178496.6A CN109540254A (en) | 2018-10-10 | 2018-10-10 | A kind of fuel oil for vehicles overmeasure computation method based on voltage ratio |
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| CN109540254A true CN109540254A (en) | 2019-03-29 |
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| CN201811178496.6A Pending CN109540254A (en) | 2018-10-10 | 2018-10-10 | A kind of fuel oil for vehicles overmeasure computation method based on voltage ratio |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111238600A (en) * | 2020-02-12 | 2020-06-05 | 五羊—本田摩托（广州）有限公司 | Vehicle remaining oil amount detection method and device, vehicle and storage medium |
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| CN2614972Y (en) * | 2003-03-26 | 2004-05-12 | 上海德科电子仪表有限公司 | Car combined instrument control circuit |
| CN201060548Y (en) * | 2007-06-28 | 2008-05-14 | 上海德科电子仪表有限公司 | Improved circuit for improving A/D sampling precision of vehicle |
| CN201506310U (en) * | 2009-09-28 | 2010-06-16 | 延锋伟世通怡东汽车仪表有限公司 | Automobile analog resistance signal precision sampling circuit |
| CN202002697U (en) * | 2011-03-14 | 2011-10-05 | 重庆矢崎仪表有限公司 | Fuel gauge signal collection circuit |
| CN204881767U (en) * | 2015-07-13 | 2015-12-16 | 潍柴动力股份有限公司 | Measure device and car of fuel liquid level |
| CN105606180A (en) * | 2015-12-28 | 2016-05-25 | 奇瑞汽车股份有限公司 | Sampling circuit of automotive fuel gauge and fault diagnosis method thereof |
| CN106092358A (en) * | 2016-06-13 | 2016-11-09 | 潍柴动力股份有限公司 | A kind for the treatment of method and apparatus of resistance sensor signal |
| CN107884023A (en) * | 2017-09-30 | 2018-04-06 | 惠州市德赛西威汽车电子股份有限公司 | A kind of fuel gauge test circuit, device and method |
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Patent Citations (8)
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|---|---|---|---|---|
| CN2614972Y (en) * | 2003-03-26 | 2004-05-12 | 上海德科电子仪表有限公司 | Car combined instrument control circuit |
| CN201060548Y (en) * | 2007-06-28 | 2008-05-14 | 上海德科电子仪表有限公司 | Improved circuit for improving A/D sampling precision of vehicle |
| CN201506310U (en) * | 2009-09-28 | 2010-06-16 | 延锋伟世通怡东汽车仪表有限公司 | Automobile analog resistance signal precision sampling circuit |
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| CN204881767U (en) * | 2015-07-13 | 2015-12-16 | 潍柴动力股份有限公司 | Measure device and car of fuel liquid level |
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| CN106092358A (en) * | 2016-06-13 | 2016-11-09 | 潍柴动力股份有限公司 | A kind for the treatment of method and apparatus of resistance sensor signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111238600A (en) * | 2020-02-12 | 2020-06-05 | 五羊—本田摩托（广州）有限公司 | Vehicle remaining oil amount detection method and device, vehicle and storage medium |
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Application publication date: 20190329 |
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