CN202533125U - Distance induction type oil mass sensor - Google Patents
Distance induction type oil mass sensor Download PDFInfo
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- CN202533125U CN202533125U CN2012201318107U CN201220131810U CN202533125U CN 202533125 U CN202533125 U CN 202533125U CN 2012201318107 U CN2012201318107 U CN 2012201318107U CN 201220131810 U CN201220131810 U CN 201220131810U CN 202533125 U CN202533125 U CN 202533125U
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- sensor
- distance
- conduit
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- buoy
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Abstract
The utility model provides a distance induction type oil mass sensor, and belongs to sensor devices of automobile oil tank oil mass. The distance induction type oil mass sensor comprises a guide pipe which is vertically arranged in the center of an oil tank; the bottom of the guide pipe is contacted with the bottom of the oil tank; an oil inlet is arranged at the bottom of the guide pipe; an air discharging hole is formed in the upper part of the guide pipe; a buoy which is in clearance fit with an inner cavity of the guide pipe is arranged in the guide pipe; a sensing module is arranged at the upper end of the guide pipe; the sensing module comprises at least one distance inductor; the distance measuring direction of the distance inductor is right opposite to the upper surface of the buoy; and the sensing module also comprises an operation module and an output module. The sensor can effectively prevent influences caused by swaying of the liquid level and the change of the temperature, electron sensing elements of the sensor can be kept static, so that the superior sensing accuracy can be realized.
Description
Affiliated technical field
The utility model relates to a kind of fuel tank fuel quantity sensing device, particularly, is a kind of fuel-quantity transducer that has buoy.
Background technology
In automotive oil tank, need read fuel tank fuel quantity through sensor, traditional automotive oil tank adopts the sub-sensing device of mechanical type oil float; It mainly comprises sensing box, dwang, oil float, and oil float floats on the oil level, and drives dwang; Make dwang drive the potentiometer action in the sensing box through rotating shaft; With the dividing potential drop of regulator potentiometer, thereby can know the position of oil float, calculate the height of oil level through reading partial pressure value; Because automobile is in the process of moving, the time regular meeting run into the road conditions of jolting, in the case, the oil level in the fuel tank also will rock with car body, the position of oil float fluctuation together then, at this moment, sensor is difficult to provide oil mass data accurately.
In present improved technology, the fuel level sensor of other type has appearred, like the throw-in type pressure transducer; This sensor is in the fuel tank bottom; Through measuring the oil pressure of fuel tank bottom, calculate the height of actual oil level, because the pressure of fuel tank bottom receives the oil level influence of fluctuations less; The pressure of static time bottom is suitable with oil level, therefore eliminates the influence that automobile bumpiness produces; A kind of in addition fuel level sensor then is through conduit buoy and the outer fluid of conduit to be isolated; To eliminate the influence of liquid fluctuating to buoy; And make sensing capacitance of buoy traction, change the electric capacity of sensing capacitance through the position change of buoy, through the electric capacity of circuit measuring sensing capacitance; Can know buoy position, that is know oil level.Yet in these two kinds of improved technology; Electronic sensor (like sensing capacitance) is in the mechanical type variable condition all the time, and this makes the stability of sensing element be difficult to be protected, and; The sensing element temperature influence that is surrounded by fluid is very big, and this has also caused the decline of the precision of sensing.
The utility model content
To the problems referred to above; It is a kind of apart from the induction type fuel-quantity transducer that the purpose of the utility model is to provide; This sensor can effectively be resisted oil level and rock the influence that is produced with temperature variation, and self electronic sensor keeps static, has superior sensing accuracy.
The utility model solves the technical scheme that its technical matters adopted: this comprises the conduit that vertically is arranged at the fuel tank center apart from the induction type fuel-quantity transducer; Said conduit bottom contacts with the fuel tank bottom; And said conduit bottom is provided with oil supply hole, and top is provided with vent port; Be provided with a buoy with the conduit cavity clearance fit in the said conduit; The upper end of said conduit is provided with sensing module, and said sensing module comprises at least one distance-sensor, and the range finding direction of said distance-sensor is over against the upper surface of said buoy; Said sensing module also comprises a computing module and an output module.
As preferably, also be provided with a guide rod on the axis of said conduit, this guide rod passes said buoy center, further buoy is retrained, and prevents that it from rocking.
As preferably, said distance-sensor is the ultrasonic distance inductor.
As preferably, said distance-sensor can also be laser distance inductor or infrared distance-sensor, and this moment, the upper surface of said buoy was preferably smooth surface.
As preferably, said distance-sensor has two or more, is uniformly distributed with around said conduit axis, to eliminate the measuring error that the fluctuation that possibly occur because of said buoy or upper surface out-of-flatness cause; In the case, measured value is got the range averaging value that each said distance-sensor is returned; And, disturb each said range sensor one after the other work for preventing mutual signal.
The beneficial effect of the utility model is: this apart from the induction type fuel-quantity transducer in use; Because conduit is located at the fuel tank center; And the oil level at fuel tank center height equals oil level average height everywhere all the time; Again because the isolation and the effect of contraction of conduit, therefore, the influence that the height of buoy and stationarity are rocked by oil level no longer; And adopt fixed distance-sensor that the buoy height is measured, and owing to range sensor is not surrounded by fluid, so working temperature is comparatively stable, and performance is also comparatively stable, can obtain superior measuring accuracy.
Description of drawings
Fig. 1 is this structural representation apart from induction type fuel-quantity transducer embodiment one.
Fig. 2 is this structural representation apart from induction type fuel-quantity transducer embodiment two.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified:
Embodiment one:
The embodiment one that is this apart from the induction type fuel-quantity transducer shown in Figure 1 in this embodiment, comprises the conduit 1 that vertically is arranged at the fuel tank center, and said conduit 1 bottom and fuel tank bottom contacts, and said conduit 1 bottom is provided with oil supply hole 11, and top is provided with vent port 12; Be provided with a diameter in the inner chamber 10 of said conduit 1 and be slightly less than the buoy 3 that catheter diameter equates; A sensing module 4 is fixed in the upper end of said conduit 1, and said sensing module 4 comprises two distance-sensor 5, and the range finding direction of said distance-sensor 5 is over against the upper surface of said buoy 3; Said sensing module 4 also comprises a computing module and an output module.
Said distance-sensor 5 is the ultrasonic distance inductor, can also be laser distance inductor or infrared distance-sensor; If this distance-sensor 5 is laser distance inductor or infrared distance-sensor; Then the upper surface of said buoy should adopt smooth surface; Be beneficial to the light wave reflection, and the inside surface of said conduit 1 is preferably coarse relatively black side at this moment, to reduce the reflection interference of inner chamber 10.
Said computing module and output module in the said sensing module 4 are included in the housing; Computing module carries out computing according to the distance that is transported by said distance-sensor 5, draws actual oil mass, and its operational method is; With the distance of distance-sensor 5 apart from the fuel tank bottom; Deduct the distance of distance-sensor 5, deduct the height (this highly is definite value) that buoy 3 exposes oil level again, calculate actual level height apart from buoy 3 upper surfaces; Yet calculate actual oil mass according to the fuel tank shape, export to the automobile instrument controller through said output module again.
Each said distance-sensor 5 is uniformly distributed with around said conduit 1 axis, to eliminate the measuring error that the fluctuation that possibly occur because of said buoy 3 or upper surface out-of-flatness cause; In the case, measured value is got the range averaging value that each said distance-sensor 5 is returned; For preventing that mutual signal from disturbing, each said range sensor 5 one after the other work, as, in a measuring period (this cycle is extremely short), the preceding semiperiod, back half period was worked by second distance-sensor 5 by first distance-sensor 5 work.
Embodiment two:
The embodiment two that is this apart from the induction type fuel-quantity transducer shown in Figure 2; In this embodiment, the difference with embodiment one mainly is: also be provided with a guide rod 2 on the axis of said conduit 1, this guide rod 2 passes said buoy 3 centers; Further buoy 3 is retrained, prevent that it from rocking.
Above-mentioned two embodiment have all adopted two distance-sensor 5, during actual enforcement, can also adopt one to a plurality of distance-sensor, can be according to cost factor, and the size of distance-sensor is done adjustment adaptively.
Above-mentioned apart from the induction type fuel-quantity transducer in use; Because conduit 1 is located at the fuel tank center; And the oil level at fuel tank center height equals oil level average height everywhere all the time; Again because the isolation and the effect of contraction of conduit 1, therefore, the influence that the height of buoy 3 and stationarity are rocked by oil level no longer; And adopt 5 pairs of buoys 3 of fixed distance-sensor highly to measure, and owing to range sensor 5 is not surrounded by fluid, so working temperature is comparatively stable, and performance is also comparatively stable, can obtain superior measuring accuracy.
The above is merely the preferred embodiment of the utility model, and is in order to restriction the utility model, not all within the spirit and principle of the utility model, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (7)
1. one kind apart from the induction type fuel-quantity transducer; Comprise the conduit (1) that vertically is arranged at the fuel tank center; Said conduit (1) bottom contacts with the fuel tank bottom; And said conduit (1) bottom is provided with oil supply hole (11), and top is provided with vent port (12), it is characterized in that: be provided with a buoy (3) with conduit cavity (10) clearance fit in the said conduit (1); The upper end of said conduit (1) is provided with sensing module (4), and said sensing module (4) comprises at least one distance-sensor (5), and the range finding direction of said distance-sensor (5) is over against the upper surface of said buoy (3); Said sensing module (4) also comprises a computing module and an output module.
2. according to claim 1 apart from the induction type fuel-quantity transducer, it is characterized in that: said distance-sensor (5) is the ultrasonic distance inductor.
3. according to claim 1 apart from the induction type fuel-quantity transducer, it is characterized in that: said distance-sensor (5) is the laser distance inductor.
4. according to claim 1 apart from the induction type fuel-quantity transducer, it is characterized in that: said distance-sensor (5) is infrared distance-sensor.
5. according to claim 3 or 4 described apart from the induction type fuel-quantity transducer, it is characterized in that: the upper surface of said buoy (3) is a smooth surface.
According among the claim 1-4 any one described apart from the induction type fuel-quantity transducer, it is characterized in that: said distance-sensor (5) has two or more, is uniformly distributed with around said conduit (1) axis.
7. according to claim 1 apart from the induction type fuel-quantity transducer, it is characterized in that: also be provided with a guide rod (2) on the axis of said conduit (1), this guide rod (2) passes said buoy (3) center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201318107U CN202533125U (en) | 2012-03-24 | 2012-03-24 | Distance induction type oil mass sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201318107U CN202533125U (en) | 2012-03-24 | 2012-03-24 | Distance induction type oil mass sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202533125U true CN202533125U (en) | 2012-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201318107U Expired - Fee Related CN202533125U (en) | 2012-03-24 | 2012-03-24 | Distance induction type oil mass sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202533125U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987742A (en) * | 2015-02-27 | 2016-10-05 | 上海通用汽车有限公司 | Liquid level detection device and method |
| CN109945072A (en) * | 2019-03-29 | 2019-06-28 | 江西景旺精密电路有限公司 | A kind of removal waste fluid device and method |
-
2012
- 2012-03-24 CN CN2012201318107U patent/CN202533125U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987742A (en) * | 2015-02-27 | 2016-10-05 | 上海通用汽车有限公司 | Liquid level detection device and method |
| CN109945072A (en) * | 2019-03-29 | 2019-06-28 | 江西景旺精密电路有限公司 | A kind of removal waste fluid device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20130324 |