CN104422493A - Liquid level detection device and liquid storage device - Google Patents
Liquid level detection device and liquid storage device Download PDFInfo
- Publication number
- CN104422493A CN104422493A CN201310376264.2A CN201310376264A CN104422493A CN 104422493 A CN104422493 A CN 104422493A CN 201310376264 A CN201310376264 A CN 201310376264A CN 104422493 A CN104422493 A CN 104422493A
- Authority
- CN
- China
- Prior art keywords
- resistance strain
- liquid level
- strain gage
- detection device
- level detection
- Prior art date
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- 239000007788 liquid Substances 0.000 title claims abstract description 96
- 238000001514 detection method Methods 0.000 title claims abstract description 35
- 239000011888 foil Substances 0.000 claims description 9
- 210000005056 cell body Anatomy 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 abstract description 10
- 230000009471 action Effects 0.000 abstract description 7
- 230000005484 gravity Effects 0.000 abstract description 5
- 239000002828 fuel tank Substances 0.000 description 5
- 238000012512 characterization method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- 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
- G01F23/0038—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 using buoyant probes
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Level Indicators Using A Float (AREA)
Abstract
The invention provides a liquid level detection device which comprises a base, a resistance strain gauge, a mandrel, a positioning part, a controller and a display unit. According to the liquid level detection device, after the liquid level detection device is placed into a liquid storage device, the mandrel applies force to the resistance strain gauge under the resultant action of the gravity of the mandrel and liquid buoyancy, so that the resistance strain gauge generates corresponding mechanical deformation and outputs different resistance values. The controller calculates liquid level height according to different resistance values, and the liquid level height is displayed by the display unit. The liquid level height is obtained by the aid of change of acting force of the mandrel on the resistance strain gauge, the liquid level detection device is simple in structure and high in reliability, the resistance values outputted by the resistance strain gauge are stable and reliable, acquired liquid level information is accurate, and liquid level detection cost is reduced.
Description
Technical field
The present invention relates to automobile technical field, in particular to a kind of liquid level detection device and liquid storage equipment.
Background technology
In the fuel tank of existing automotive fuel oil system, slide resistor formula liquid level sensor is usually adopted to detect the liquid level in fuel tank.But the sliding contact in slide resistor formula liquid level sensor and easily occur that Mechanical Contact is bad between conduction band, even there are sliding contact and conduction band surface sulfide, oxidation corrosion, wearing and tearing, especially impurity, jelly or oil film in bad fluid all may cause producing contact resistance between sliding contact and conduction band, the resistance causing fuel level sensor to export is unstable, thus resistance value corresponding to real liquid level cannot be obtained, make detection oil level signal inaccurate.
Summary of the invention
The present invention is intended to solve one of above-mentioned technical matters of the prior art at least to a certain extent.For this reason, one object of the present invention be to propose a kind of reliability higher, the liquid level detection device of gravity sensing formula.Another object of the present invention is to propose a kind of liquid storage equipment with above-mentioned liquid level detection device.
According to an aspect of the present invention, provide a kind of liquid level detection device, comprising: base; Resistance strain gage, described resistance strain gage is fixedly connected with described base and is positioned at the top of described base; Plug, the lower end of described plug is connected with the upper surface of described resistance strain gage; Keeper, described keeper is configured with the pilot hole arranged along the vertical direction, and described plug stretches in described pilot hole, and can move along the vertical direction along described pilot hole; Controller, described controller is connected by going between with described resistance strain gage; And display unit, described display unit is connected with described controller.
Liquid level detection device according to an embodiment of the invention, after liquid level detection device puts into liquid storage equipment, plug exerts a force to resistance strain gage under being subject to the force action of self gravitation and liquid buoyancy, make resistance strain gage produce corresponding mechanically deform, make resistance strain gage export different resistances.Controller goes out liquid level according to different computing the resistor values, and is shown by display unit.Thus, utilize plug to the change of the acting force of resistance strain gage to obtain the height of liquid level, structure is simple, and the resistance value that resistance strain gage exports is reliable and stable, and reliability is high, and the liquid level information obtained is relatively more accurate, reduces level sensing cost.
According to one embodiment of present invention, described plug is connected with the center of described resistance strain gage.
According to one embodiment of present invention, described base comprises spaced apart first support portion and the second support portion, and described first support portion is connected with the left end of described resistance strain gage, and described second support portion is connected with the right-hand member of described resistance strain gage.
According to one embodiment of present invention, described base structure becomes middle part to have through hole, and described through hole is relative with the described center of described resistance strain gage.
According to one embodiment of present invention, described resistance strain gage is the one in wire form foil gauge, foil gage and semiconductor gauge.
According to one embodiment of present invention, the lower end of described plug is fixedly connected with the upper surface of described resistance strain gage.
According to another aspect of the present invention, provide a kind of liquid storage equipment, comprising: casing; Liquid level detection device, the described resistance strain gage of described liquid level detection device, described plug, described base and described keeper are positioned at described casing, and described keeper is connected with the inwall of described casing.
Liquid storage equipment according to an embodiment of the invention, after liquid level detection device puts into liquid storage equipment, plug exerts a force to resistance strain gage under being subject to the force action of self gravitation and liquid buoyancy, make resistance strain gage produce corresponding mechanically deform, make resistance strain gage export different resistances.Controller goes out liquid level according to different computing the resistor values, and is shown by display unit.Thus, utilize plug to the change of the acting force of resistance strain gage to obtain the height of liquid level, structure is simple, and the resistance value that resistance strain gage exports is reliable and stable, and reliability is high, and the liquid level information obtained is relatively more accurate, reduces level sensing cost.
According to one embodiment of present invention, the interior end of described casing, has the cell body mated with described base.
According to one embodiment of present invention, the upper end of described casing is provided with flange, described keeper is the sleeve be connected with described flange lower end, and the top of described plug is set in described sleeve, and the upper end of described plug at least has preset distance apart from the top of described sleeve.
According to one embodiment of present invention, the upper end of described flange is provided with inserting terminal, and described inserting terminal is connected with described controller and resistance strain gage respectively.
Accompanying drawing explanation
Fig. 1 is the structural representation of liquid level detection device according to an embodiment of the invention.
Fig. 2 is the structural representation of liquid storage equipment according to an embodiment of the invention.
Reference numeral:
1 base, 2 lead-in wires, 3 flanges, 4 plugs, 5 resistance strain gages, 11 inserting terminals, 12 keepers, 21 first support portions, 22 second support portions, 23 cell bodies, 200 casings, 300 display units.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature immediately below second feature and tiltedly below, or only represent that fisrt feature level height is less than second feature.
As shown in Figure 1-2, liquid level detection device according to an embodiment of the invention, can comprise: base 1, resistance strain gage 5, plug 4, keeper 12, controller (not shown) and display unit 300.
Specifically, resistance strain gage 5 is fixedly connected with base 1 and is positioned at the top of base 1, base 1 can provide support for resistance strain gage 5, with when base 1 and resistance strain gage 5 are located in liquid storage equipment, base 1 is contacted with the inner bottom surface of liquid storage equipment, and resistance strain gage 5 can produce mechanical deformation.The lower end of plug 4 is connected with the upper surface of resistance strain gage 5, so that plug 4 can apply pressure to resistance strain gage, makes resistance strain gage produce deformation.Keeper 12 is configured with the pilot hole arranged along the vertical direction, and plug 4 stretches in pilot hole, and vertically can move in (shown in Figure 1) direction along pilot hole, avoids plug 4 that lateral excursion occurs.Controller is connected by lead-in wire 2 with resistance strain gage 5, with the real-time resistance information obtaining resistance strain gage 5.Display unit 300 is connected to show liquid level information with controller.Wherein plug 4 is subject to different buoyancy under different liquid level, it is made to change to the acting force of resistance strain gage 5, and the resistance of resistance strain gage 5 is correspondingly changed, controller, according to the change of resistance strain gage 5 resistance, is calculated level value and is shown by display unit 300.Filter function should be had, to filter out the impact of vibrations on plug 4 gravity in the circuit of display unit 300.
Liquid level detection device according to an embodiment of the invention, after liquid level detection device puts into liquid storage equipment, under plug 4 is subject to the force action of self gravitation and liquid buoyancy, resistance strain gage 5 is exerted a force, make resistance strain gage 5 produce corresponding mechanically deform, make resistance strain gage 5 export different resistances.Controller goes out liquid level according to different computing the resistor values, and is shown by display unit 300.Thus, utilize the change of the acting force of plug 4 pairs of resistance strain gages 5 to obtain the height of liquid level, structure is simple, and the resistance value that resistance strain gage 5 exports is reliable and stable, and reliability is high, and the liquid level information obtained is relatively more accurate, reduces level sensing cost.
Be understandable that, when resistance strain gage 5 is subject to External Force Acting generation mechanically deform, its resistance also can change thereupon.By demarcating power and the resistance homologous thread that can obtain resistance strain gage 5, when known resistance foil gauge resistance value, the stressed size of resistance strain gage can be obtained.The density of plug 4 is greater than the density of its surrounding liquid, to make gravity suffered by plug 4 be greater than buoyancy suffered by it, ensure plug 4 by suffered force action on resistance strain gage 5.The power that resistance strain gage 5 is subject to is the gravity G of plug 4
rodwith the buoyancy F of plug surrounding liquid to plug 4
floatingmake a concerted effort F, therefore F=G
rod-F
floating.And the buoyancy F that plug 4 is subject to
floatingwith the volume V of its immersion liquid
rowclosely related: F
floating=ρ
liquidg V
row.Therefore at known plug 4 buoyancy F
floatingwhen, can show that plug 4 immerses the volume V of liquid
row, then according to the volume computing formula of plug 4, the height h of remaining liq in liquid that plug 4 immerses instead can be released.And then the volume of remaining liq in liquid that plug 4 immerses can be obtained according to the fuel tank height demarcated and PRESSURE-VOLUME RELATION.
As shown in Figure 1, according to one embodiment of present invention, plug 4 is connected with the center of resistance strain gage 5.In other words, plug 4 one end is connected with the center of resistance strain gage 5.Thus, the acting force suffered by plug 4 is made all to act on resistance strain gage 5.
As shown in Figure 1, according to one embodiment of present invention, base 1 comprises spaced apart first support portion 21 and the second support portion 21, support portion 22, first is connected with the left end of resistance strain gage 5, and the second support portion 22 is connected with the right-hand member of resistance strain gage 5.Thus, can be formed with space in the below of resistance strain gage 5, the middle part being convenient to resistance strain gage 5 produces downward mechanical deformation when stressed, improves the sensitivity of resistance strain gage 5.Be understandable that, the structure of base 1 is not limited to this, such as, according to one embodiment of present invention, base 1 is configured to middle part and has through hole, and through hole is relative with the center of resistance strain gage 5, thus leaves predetermined deformation space for resistance strain gage 5, the middle part being convenient to resistance strain gage 5 produces downward mechanical deformation when stressed, improves the sensitivity of resistance strain gage 5.
According to one embodiment of present invention, resistance strain gage 5 is the one in wire form foil gauge, foil gage and semiconductor gauge.It should be noted that, resistance strain gage 5 can be wire form foil gauge, foil gage, semiconductor gauge or other kind resistance strain gages.As shown in Figure 1, plug 4 can adopt the regular shape such as right cylinder, rectangular parallelepiped so that set up the corresponding relation of volume and height.
As shown in Figure 2, according to another aspect of the present invention, provide a kind of liquid storage equipment, comprising: casing 200, liquid level detection device.
Specifically, the resistance strain gage 5 of liquid level detection device, plug 4, base 1 and keeper 12 are positioned at casing 200, and keeper 12 is connected with the inwall of casing 200.Keeper 12 can weld with casing 200, inner liquid level detection device to be fixed on casing 200.
Liquid storage equipment according to an embodiment of the invention, after liquid level detection device puts into liquid storage equipment, under plug 4 is subject to the force action of self gravitation and liquid buoyancy, resistance strain gage 5 is exerted a force, make resistance strain gage 5 produce corresponding mechanically deform, make resistance strain gage 5 export different resistances.Controller goes out liquid level according to different computing the resistor values, and is shown by display unit 300.Thus, utilize the change of the acting force of plug 4 pairs of resistance strain gages 5 to obtain the height of liquid level, structure is simple, and the resistance value that resistance strain gage 5 exports is reliable and stable, and reliability is high, and the liquid level information obtained is relatively more accurate, reduces level sensing cost.
As shown in Figure 2, according to one embodiment of present invention, the interior end of casing 200, has the cell body 23 mated with base.Thus, liquid level detection device can more stably be arranged on liquid storage device interior, can not rocking and run-off the straight because of liquid storage equipment.According to one embodiment of present invention, the lower end of plug 4 and the upper surface of resistance strain gage 5 can for being fixedly connected with.Thus, plug 4 can be avoided to offset relative to resistance strain gage 5.
As shown in Figure 2, according to one embodiment of present invention, the upper end of casing 200 is provided with flange 3, and keeper 12 is the sleeve be connected with flange 3 lower end, and the top of plug 4 is set in sleeve, and the top of the upper end distance sleeve of plug 4 at least has preset distance.Be greater than the deflection of casing 200 in application process, thus ensure plug 4 top not by External Force Acting.
As shown in Figure 2, according to one embodiment of present invention, the upper end of flange 3 is provided with inserting terminal 11, and inserting terminal 11 is connected with controller and resistance strain gage 5 respectively.It should be noted that, resistance value to be delivered to by lead-in wire 2 by resistance strain gage 5 assigns on terminal 11, terminal 11 is assigned again resistance value to be passed to controller, controller is by analog to digital conversion, and the remaining liquid capacity of casing 200 corresponding to resistance value that resistance strain gage 5 can be exported is shown by display unit 300.
As shown in Figure 2, according to one embodiment of present invention, flange 3 welds with casing 200, inner flange 3 to be fixed on casing 200.Be understandable that, flange 3 is not limited to this with the connected mode of casing 200, as long as it is inner that flange 3 can be fixed on casing 200 by it, such as, according to one embodiment of present invention, flange 3 and casing 200 can carry out assembly connection by the mode of set nut and O-ring seal or platen and O-ring seal.
According to one embodiment of present invention, liquid storage equipment can be the fuel tank of automobile.After liquid level detection device puts into fuel tank internal, under plug 4 is subject to the force action of self gravitation and liquid buoyancy, resistance strain gage 5 is exerted a force, makes resistance strain gage 5 produce corresponding mechanically deform, make resistance strain gage 5 export different resistances.Controller goes out liquid level according to different computing the resistor values, and is shown by display unit 300.Thus, utilize the change of the acting force of plug 4 pairs of resistance strain gages 5 to obtain the height of liquid level, structure is simple, and the resistance value that resistance strain gage 5 exports is reliable and stable, and reliability is high, and the liquid level information obtained is relatively more accurate, reduces level sensing cost.
In the description of this instructions, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.In addition, the different embodiment described in this instructions or example can carry out engaging and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (10)
1. a liquid level detection device, is characterized in that, comprising:
Base;
Resistance strain gage, described resistance strain gage is fixedly connected with described base and is positioned at the top of described base;
Plug, the lower end of described plug is connected with the upper surface of described resistance strain gage;
Keeper, described keeper is configured with the pilot hole arranged along the vertical direction, and described plug stretches in described pilot hole, and can move along the vertical direction along described pilot hole;
Controller, described controller is connected by going between with described resistance strain gage; And
Display unit, described display unit is connected with described controller.
2. liquid level detection device according to claim 1, is characterized in that, described plug is connected with the center of described resistance strain gage.
3. liquid level detection device according to claim 2, it is characterized in that, described base comprises spaced apart first support portion and the second support portion, and described first support portion is connected with the left end of described resistance strain gage, and described second support portion is connected with the right-hand member of described resistance strain gage.
4. liquid level detection device according to claim 2, is characterized in that, described base structure becomes middle part to have through hole, and described through hole is relative with the described center of described resistance strain gage.
5. liquid level detection device according to claim 1, is characterized in that, described resistance strain gage is the one in wire form foil gauge, foil gage and semiconductor gauge.
6. liquid level detection device according to claim 1, is characterized in that, the lower end of described plug is fixedly connected with the upper surface of described resistance strain gage.
7. a liquid storage equipment, is characterized in that, comprising:
Casing;
Liquid level detection device according to any one of claim 1-6, the described resistance strain gage of described liquid level detection device, described plug, described base and described keeper are positioned at described casing, and described keeper is connected with the inwall of described casing.
8. liquid storage equipment according to claim 7, is characterized in that, the interior end of described casing has the cell body mated with described base.
9. liquid storage equipment according to claim 7, it is characterized in that, the upper end of described casing is provided with flange, described keeper is the sleeve be connected with described flange lower end, the top of described plug is set in described sleeve, and the upper end of described plug at least has preset distance apart from the top of described sleeve.
10. liquid storage equipment according to claim 9, is characterized in that, the upper end of described flange is provided with inserting terminal, and described inserting terminal is connected with described controller and resistance strain gage respectively.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310376264.2A CN104422493A (en) | 2013-08-26 | 2013-08-26 | Liquid level detection device and liquid storage device |
| PCT/CN2014/078102 WO2015027724A1 (en) | 2013-08-26 | 2014-05-22 | Liquid level detection apparatus and liquid storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310376264.2A CN104422493A (en) | 2013-08-26 | 2013-08-26 | Liquid level detection device and liquid storage device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104422493A true CN104422493A (en) | 2015-03-18 |
Family
ID=52585506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310376264.2A Pending CN104422493A (en) | 2013-08-26 | 2013-08-26 | Liquid level detection device and liquid storage device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104422493A (en) |
| WO (1) | WO2015027724A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106959142A (en) * | 2017-03-11 | 2017-07-18 | 谢媛 | A kind of fluid level measuring instrument |
| CN113712282A (en) * | 2021-08-03 | 2021-11-30 | 深圳市基克纳科技有限公司 | Dry burning prevention control method and device, electronic atomization device and readable storage medium |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9694674B2 (en) | 2015-10-09 | 2017-07-04 | Ford Global Technologies, Llc | Systems and methods for determining the integrity of internal fuel tank structural supports |
| CN114779095A (en) * | 2022-04-25 | 2022-07-22 | 奇瑞汽车股份有限公司 | Safety state detection device and method for battery system and power battery system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113712282A (en) * | 2021-08-03 | 2021-11-30 | 深圳市基克纳科技有限公司 | Dry burning prevention control method and device, electronic atomization device and readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015027724A1 (en) | 2015-03-05 |
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