CN105424142A - Fault early-warning type oil level monitoring system - Google Patents
Fault early-warning type oil level monitoring system Download PDFInfo
- Publication number
- CN105424142A CN105424142A CN201510989413.1A CN201510989413A CN105424142A CN 105424142 A CN105424142 A CN 105424142A CN 201510989413 A CN201510989413 A CN 201510989413A CN 105424142 A CN105424142 A CN 105424142A
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- China
- Prior art keywords
- fuel
- oil level
- level sensor
- resistor
- constant current
- 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.)
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Classifications
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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
- G01F23/30—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 floats
Abstract
The invention discloses a fault early-warning type oil level monitoring system which comprises an oil level sensor circuit and a monitoring circuit. The oil level sensor circuit is composed of a variable resistor and a variable resistor contact resistor. The monitoring circuit is composed of a fuel gauge electronic control unit, a divider resistor and a constant current source power module. The contact resistor at the sliding contact head of the variable resistor is electrically connected with a fuel gauge electronic control unit, and meanwhile the contact resistor is connected with the constant current source power module through the divider resistor. According to the two ends, except the sliding contact head, of the variable resistor, one end is connected with a power source, and the other end is electrically connected with the fuel gauge electronic control unit. The whole system is powered by a storage battery of an automobile. A power source of the oil level sensor is powered by the constant current source power module. Influences of the variable resistor contact resistor in the oil level sensor on oil level signals are avoided, the degree of corrosion of fuel to the oil level sensor and a fuel pump thereof is monitored in real time to a certain degree, and early warning is carried out.
Description
Technical field
The present invention relates to the monitoring system technical field of vehicle fuel oil level, specifically a kind of fault pre-alarming formula oil level monitoring system.
Background technology
Fuel level sender is the important spare part of automobile, and automobile driver learns the surplus of vehicle fuel by the fuel level sender in automotive oil tank, estimates the distance travelled of automobile with this.Simultaneously on the automobile possessing car networking, more need the surplus accurately learning vehicle fuel, this just needs fuel level signal accurately.But the rheostat fuel level sensor of two-wire system that what current vehicle fuel fuel level sensor was taked mostly is, this kind of fuel level sensor can not eliminate the impact of rheostat contact resistance on oil level signal completely, therefore to oil level signal forbidden truly have certain hidden danger.In order to evade the impact of rheostat contact resistance on oil level signal, also someone proposes three-wire system automobile oil level sensor, and this kind of fuel level sensor can eliminate the impact of rheostat contact resistance on oil level signal completely, accurately can transmit the signal of vehicle fuel oil level.But this scheme eliminated rheostat contact resistance completely and affect oil level signal, has buried hidden danger but to the accident of casting anchor of automobile just.This is because why automobile rheostat produces contact resistance, it is the result because fuel oil causes rheostatic corrosion, since the rheostat of vehicle fuel to fuel level sensor creates corrosive attack, also just corrosive attack is produced to the fuel pump be immersed in fuel oil, when fuel pump is corroded to a certain degree, fuel pump is by complete failure, quit work, to the accident of casting anchor be there is in automobile, in this process because the impact of the rheostat contact resistance of fuel level sensor is completely eliminated, reflect so do not have symptom before cut-out of fuel pump.Vehicle fuel fuel level sensor contact resistance is on the impact of oil level signal, and automobile fuel pump is because corroding the accident of casting anchor caused, and this is the relation of fish and bear's paw, if can get both, will be the breakthrough of vehicle fuel oil level monitoring technology.
Summary of the invention
The object of the invention is to be to provide a kind of vehicle fuel oil level monitoring system, this system not only solves rheostat contact resistance in fuel level sensor affects problem to oil level signal, and Real-Time Monitoring fuel oil, to the extent of corrosion of fuel level sensor and fuel pump thereof, and has carried out early warning to a certain extent.
The object of the invention is to be achieved through the following technical solutions: it comprises fuel level sensor circuit and observation circuit two parts, wherein fuel level sensor circuit again by: variohm and variohm contact resistance two parts are formed; Observation circuit by: fuel gauge electronic control unit, divider resistance and constant current source power module are formed, the contact resistance at described variohm movable contact place is electrically connected with fuel gauge electronic control unit, and contact resistance is also connected with constant current source power module by divider resistance simultaneously; The two ends of described variohm except movable contact, wherein one end is connected with power supply, and one end is as the collection terminal of oil level signal in addition, is electrically connected with fuel gauge electronic control unit; The power supply of whole system is by the storage battery power supply of automobile, and the power supply of fuel level sensor is powered by constant current source power module.
The invention has the advantages that: what (1) can avoid rheostat contact resistance in fuel level sensor on oil level signal completely affects problem; (2) Real-Time Monitoring fuel oil is to the extent of corrosion of fuel level sensor and fuel pump thereof, and carries out early warning.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is further described in detail.
Embodiment: as shown in Figure 1, the present invention is a kind of fault pre-alarming formula oil level monitoring system.It comprises fuel tank internal fuel level sensor circuit 1 and gauge internal observation circuit 2 two parts, wherein fuel tank internal fuel level sensor circuit 1 again by: variohm 11 and variohm contact resistance 12 two parts are formed; Gauge internal observation circuit 2 by: fuel gauge electronic control unit 21, divider resistance 22 and constant current source power module 23 are formed, the contact resistance 12 at described variohm 11 movable contact place is electrically connected with fuel gauge electronic control unit 21, and contact resistance 12 is also connected with constant current source power module 23 by divider resistance 22 simultaneously; The described two ends of variohm 11 except movable contact, wherein one end is connected with power supply, and one end is as the collection terminal of oil level signal in addition, is electrically connected with fuel gauge electronic control unit 21; The power supply of whole system is by the storage battery power supply of automobile, and the power supply of fuel tank internal fuel level sensor is powered by constant current source power module 23, described contact resistance 12 be due to variohm 11 by fuel oil corrosion the resistance of issuable a kind of uncertain resistance.
When native system runs, variohm 11 in fuel tank internal fuel level sensor is under the drive of oil float, resistance value between A point and B point will change thereupon, suppose when certain oil mass, resistance value between A point and B point is Rx, the resistance of variohm contact resistance 12 is Rcontact, and the current value that constant current source power module 23 provides is I, then fuel level sensor is exported to magnitude of voltage U1 and U2 of gauge internal observation circuit and is:
U1=I*Rx, U1 are oil level signal, and the size of its magnitude of voltage and the resistance of variohm contact resistance 12 have nothing to do, that is, oil level signal is not by the impact of variohm contact resistance 12.
U2=I* (Rx+Rcontact), U2 are that fuel level sensor and fuel pump thereof are by the main signal of fuel oil extent of corrosion.
U2-U1=I*Rcontact, so the magnitude of voltage of U2-U1 represents fuel level sensor and fuel pump thereof to a certain extent by fuel oil extent of corrosion.
As U2-U1=0, that is, U2=U1 illustrates that variohm contact resistance 12 resistance of fuel level sensor is 0, illustrates that fuel level sensor and fuel pump thereof are not corroded by fuel oil to a certain extent.
When the difference of U2-U1 increases, illustrates that the resistance of variohm contact resistance 12 is Rcontact in increase, represent fuel level sensor to a certain extent and fuel pump is being increased by the degree that fuel oil corrodes.
Above-described embodiment is one of the present invention preferably scheme, not does any pro forma restriction to the invention of this reality, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.
Claims (1)
1. fault pre-alarming formula oil level monitoring system, is characterized in that, it comprises fuel level sensor circuit and observation circuit two parts, wherein fuel level sensor circuit again by: variohm and variohm contact resistance two parts are formed; Observation circuit by: fuel gauge electronic control unit, divider resistance and constant current source power module are formed, the contact resistance at described variohm movable contact place is electrically connected with fuel gauge electronic control unit, and contact resistance is also connected with constant current source power module by divider resistance simultaneously; The two ends of described variohm except movable contact, wherein one end is connected with power supply, and one end is as the collection terminal of oil level signal in addition, is electrically connected with fuel gauge electronic control unit; The power supply of whole system is by the storage battery power supply of automobile, and the power supply of fuel level sensor is powered by constant current source power module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510989413.1A CN105424142A (en) | 2015-12-24 | 2015-12-24 | Fault early-warning type oil level monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510989413.1A CN105424142A (en) | 2015-12-24 | 2015-12-24 | Fault early-warning type oil level monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105424142A true CN105424142A (en) | 2016-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510989413.1A Pending CN105424142A (en) | 2015-12-24 | 2015-12-24 | Fault early-warning type oil level monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782407A (en) * | 2017-09-11 | 2018-03-09 | 惠州市德赛西威汽车电子股份有限公司 | A kind of fuel-quantity transducer and oil mass detection circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338655A (en) * | 2010-07-22 | 2012-02-01 | 联合汽车电子有限公司 | Vehicle oil level sensor and implementation method thereof |
| CN104833705A (en) * | 2014-10-27 | 2015-08-12 | 北汽福田汽车股份有限公司 | Automobile, and fuel oil monitoring device |
| CN104833404A (en) * | 2014-11-06 | 2015-08-12 | 北汽福田汽车股份有限公司 | Oil level detection device, automobile, oil tank and oil level detection method |
| CN105136250A (en) * | 2015-09-15 | 2015-12-09 | 苏州塔夫电子科技有限公司 | Oil level detection device and detection method for fuel oil tank |
| CN205373819U (en) * | 2015-12-24 | 2016-07-06 | 合肥市实固尔汽车部件有限公司 | Trouble early -warning type oil level monitoring system |
-
2015
- 2015-12-24 CN CN201510989413.1A patent/CN105424142A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102338655A (en) * | 2010-07-22 | 2012-02-01 | 联合汽车电子有限公司 | Vehicle oil level sensor and implementation method thereof |
| CN104833705A (en) * | 2014-10-27 | 2015-08-12 | 北汽福田汽车股份有限公司 | Automobile, and fuel oil monitoring device |
| CN104833404A (en) * | 2014-11-06 | 2015-08-12 | 北汽福田汽车股份有限公司 | Oil level detection device, automobile, oil tank and oil level detection method |
| CN105136250A (en) * | 2015-09-15 | 2015-12-09 | 苏州塔夫电子科技有限公司 | Oil level detection device and detection method for fuel oil tank |
| CN205373819U (en) * | 2015-12-24 | 2016-07-06 | 合肥市实固尔汽车部件有限公司 | Trouble early -warning type oil level monitoring system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782407A (en) * | 2017-09-11 | 2018-03-09 | 惠州市德赛西威汽车电子股份有限公司 | A kind of fuel-quantity transducer and oil mass detection circuit |
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Application publication date: 20160323 |
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