CN112097867A - Active electronic type oil level sensor suitable for sensing oil level of automobile oil tank - Google Patents
Active electronic type oil level sensor suitable for sensing oil level of automobile oil tank Download PDFInfo
- Publication number
- CN112097867A CN112097867A CN202010928243.7A CN202010928243A CN112097867A CN 112097867 A CN112097867 A CN 112097867A CN 202010928243 A CN202010928243 A CN 202010928243A CN 112097867 A CN112097867 A CN 112097867A
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- Prior art keywords
- sensing
- fuel
- pipe body
- active electronic
- level
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- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000000446 fuel Substances 0.000 claims description 18
- 239000002828 fuel tank Substances 0.000 claims description 8
- 239000004585 electronic sealant Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims 2
- 235000014676 Phragmites communis Nutrition 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 3
- 230000035939 shock Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- JAYCNKDKIKZTAF-UHFFFAOYSA-N 1-chloro-2-(2-chlorophenyl)benzene Chemical compound ClC1=CC=CC=C1C1=CC=CC=C1Cl JAYCNKDKIKZTAF-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 101100084627 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) pcb-4 gene Proteins 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- G01F23/30—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
- G01F23/64—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 of the free float type without mechanical transmission elements
- G01F23/72—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 of the free float type without mechanical transmission elements using magnetically actuated indicating means
- G01F23/74—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 of the free float type without mechanical transmission elements using magnetically actuated indicating means for sensing changes in level only at discrete points
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Level Indicators Using A Float (AREA)
Abstract
The invention discloses an active electronic oil level sensor suitable for sensing the oil level of an automobile oil tank, which comprises a liquid level sensing module and a power signal wiring harness module, wherein the liquid level sensing module comprises a mounting plate, a pipe body, a circuit board assembly and a floater, and the power signal wiring harness module comprises a battery, a power line and a cable. The sensing element of the active electronic oil level sensor adopts an electronic switch (TMR magnetic resistance chip), and is characterized by no contact, no noise, high reliability, good consistency, small volume, convenient installation, improved production efficiency, increased quantity and density of the electronic switch (TMR magnetic resistance chip) and improved liquid level measurement precision; the defects that the reed pipe has weak shock resistance and impact resistance, and the bent leg is easy to form and break easily are overcome; the volume is large, and the precision is low; the contact arm is in mechanical fatigue and short in service life.
Description
Technical Field
The invention relates to the technical field of oil level sensors, in particular to an active electronic oil level sensor suitable for sensing the oil level of an automobile oil tank.
Background
The measurement of liquid level is an important component of automatic control systems of automobiles, oil and gas, oil fields, water treatment stations and petrochemical devices. At present, in low accuracy level measurement, reed switch level sensor is mostly adopted, but reed switch level sensor has many shortcomings: (1) the shock resistance and the impact resistance are weak; (2) the volume is large, and the precision is low; (3) the contact arm is in mechanical fatigue and short in service life.
Disclosure of Invention
The invention aims to provide an active electronic oil level sensor suitable for sensing the oil level of an automobile oil tank, which adopts an electronic switch (TMR magnetic resistance chip) to replace a traditional reed switch and adopts active detection to overcome the defects.
The invention realizes the purpose through the following technical scheme:
an active electronic oil level sensor suitable for sensing the oil level of an automobile oil tank comprises a liquid level sensing module and a power signal wiring harness module,
the liquid level sensing module comprises a mounting plate, a pipe body, a circuit board assembly and a floater, wherein the pipe body is fixed in an automobile oil tank through the mounting plate, the circuit board assembly is embedded in the pipe body and arranged along the length direction of the pipe body, the circuit board assembly consists of a PCB (printed circuit board), a TMR (triple magneto resistance) chip and a mounting resistor, the TMR chip is arranged on the PCB, the floater is movably arranged outside the pipe body, and a magnet is arranged inside the floater;
the power signal wire harness module comprises a battery, a power line and a cable, the battery is connected into the power line, one ends of the power line and the cable are connected with the automobile instrument through connectors, and the other ends of the power line and the cable are connected with the circuit board assembly in the liquid level sensing module through connectors.
The improved structure of the oil-passing pipe is characterized in that the floater is in a cylindrical ring shape, a plurality of contact strips are formed on the inner ring surface of the floater along the height direction of the cylinder, the floater is in sliding contact with the pipe body through the contact strips, all the contact strips are uniformly distributed, and oil-passing gaps are formed between adjacent contact strips.
The further improvement lies in that the cross section of the contact strip is semicircular, and the contact strip is in line contact with the pipe body through the arc surface of the contact strip.
The further improvement is that the radius of the semicircular cross section of the contact strip is 1-2mm, and the distance between round mandrels of adjacent contact strips is 3.5-4.5 mm.
In a further improvement, the mounting plate is a mounting flange bottom plate with a central hole.
The further improvement is that the pipe body is a stainless steel pipe.
The further improvement lies in that electronic sealant is filled between the interior of the pipe body and the circuit board assembly.
The further improvement is that the output voltage range of the battery is DC:1.5-6V, and the battery capacity is more than or equal to 3 Ah.
The invention has the beneficial effects that:
(1) the invention uses TMR magnetic resistance chip to replace glass package reed switch, which belongs to integrated electronic circuit switch, therefore, the invention has the advantages of no contact, no noise, high reliability, good consistency, small volume, convenient installation, improved production efficiency, increased number and density of electronic switches and improved liquid level measurement precision; the defects that the reed pipe has weak shock resistance and impact resistance, and the bent leg is easy to form and break easily are overcome; the volume is large, and the precision is low; the contact arm is in mechanical fatigue and short in service life.
(2) According to the invention, the contact strips are arranged on the inner ring surface of the floater, and the oil passing gap is formed between the contact strips, so that the floater and the pipe body can be better matched, the lateral shaking is reduced, the phenomenon that the inner ring surface of the floater and the pipe body are stuck can be avoided through the oil passing gap, the floater can stably and smoothly slide all the time, and the liquid level measurement precision is improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the structure of the float;
in the figure: 1. mounting a plate; 2. a pipe body; 3. a float; 301. a contact bar; 302. an oil passing gap; 4. a PCB board; 5. TMR magnetic resistance chip; 6. mounting a resistor; 7. a magnet; 8. a battery; 9. a power line; 10. a cable wire; 11. a connector; 12. and (4) electronic sealing glue.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
As shown in fig. 1, an active electronic fuel level sensor suitable for sensing the fuel level of an automobile fuel tank comprises a liquid level sensing module and a power signal wiring harness module:
the liquid level sensing module comprises a mounting plate 1, a pipe body 2, a circuit board assembly and a floater 3, wherein the pipe body 2 is fixed in an automobile oil tank through the mounting plate 1 and is vertically mounted, the circuit board assembly is embedded in the pipe body 2 and arranged along the length direction of the pipe body 2, the circuit board assembly consists of a PCB (printed circuit board) 4, a TMR (triple Mixed magneto resistance) chip 5 and a mounting resistor 6 which are arranged on the PCB 4, the TMR magneto resistance chip 5 and the mounting resistor 6 which are linearly distributed along the PCB 4 form a magneto resistance sequence, the floater 3 is movably arranged outside the pipe body 2, and a magnet 7 is arranged inside the floater 3; the floater 3 slides up and down along with the liquid level on the outer surface of the tube body 2, the magnet 7 can enable the TMR magnetic resistance chip 5 at the corresponding position to be conducted, the output end of the drain electrode electronic switch and the resistor form a series resistance network, the resistance value output changed due to the liquid level change is met, the requirement of the automobile fuel instrument on the input resistance value change due to the oil level change is met, and the fuel change is monitored;
the power supply signal wiring harness module comprises a battery 8, a power line 9 and a cable 10, the output voltage range of the battery 8 is 1.5-6V, the battery capacity is larger than or equal to 3Ah, the battery 8 is connected to the power line 9, one end of the power line 9 and one end of the cable 10 are connected with an automobile instrument through connectors 11, and the other end of the power line 9 and the other end of the cable are connected with a circuit board assembly in the liquid level sensing module through the connectors 11 and used for signal and current transmission.
Referring to fig. 2, in the present invention, the float 3 is in a cylindrical ring shape, a plurality of contact strips 301 are formed on an inner annular surface of the float 3 along a height direction of the cylinder, the float 3 is in sliding contact with the pipe body 2 through the contact strips 301, all the contact strips 301 are uniformly distributed, and an oil gap 302 is formed between adjacent contact strips 301. Specifically, the cross section of the contact strip 301 is semicircular, and the contact strip 301 is in line contact with the pipe body 2 through the arc surface. The radius of the semicircular cross section of the contact strip 301 is 1-2mm, and the distance between the round mandrels of the adjacent contact strips 301 is 3.5-4.5 mm.
When float 3 slides, contact strip 301 and body 2 surface contact, it is through-going from top to bottom to cross oily clearance 302 then for oil can pass through from crossing oily clearance 302, has avoided the viscous phenomenon that produces because body 2 and 3 interior anchor ring smooth surface direct contact of float, and viscous phenomenon can make float 3 produce great frictional force, and the unable timely liquid level height that follows slides.
In the invention, the mounting plate 1 is a mounting flange bottom plate with a central hole and is mounted at the top of the oil tank through bolts, and the pipe body 2 is a stainless steel pipe.
In the invention, the electronic sealant 12 is filled between the interior of the pipe body 2 and the circuit board assembly, and the electronic sealant 12 can play a role in fixing and protecting the circuit board assembly.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (8)
1. The utility model provides an active electronic type oil level sensor suitable for car oil tank oil level sensing which characterized in that: comprises a liquid level sensing module and a power signal wiring harness module,
the liquid level sensing module comprises a mounting plate (1), a pipe body (2), a circuit board assembly and a floater (3), the pipe body (2) is fixed in an automobile oil tank through the mounting plate (1), the circuit board assembly is embedded in the pipe body (2) and arranged along the length direction of the pipe body (2), the circuit board assembly is composed of a PCB (4), a TMR (triple modular magneto resistance) chip (5) and a surface-mounted resistor (6), the TMR chip is arranged on the PCB (4), the floater (3) is movably arranged outside the pipe body (2), and a magnet (7) is arranged inside the floater (3);
power signal pencil module includes battery (8), power cord (9) and cable conductor (10), battery (8) access power cord (9), the one end of power cord (9) and cable conductor (10) all is connected with motormeter through connector (11), and the other end all is connected with circuit board assembly among the liquid level sensing module through connector (11).
2. An active electronic fuel level sensor adapted for use in sensing the level of fuel in a vehicle fuel tank as claimed in claim 1, wherein: float (3) are the cylinder annular, are formed with a plurality of contact strip (301) along cylinder direction of height on float (3) inner annular face, and float (3) are through contact strip (301) and body (2) sliding contact, all contact strip (301) evenly distributed, and are formed with between adjacent contact strip (301) and cross oily clearance (302).
3. An active electronic fuel level sensor adapted for use in sensing the level of fuel in a vehicle fuel tank as claimed in claim 2, wherein: the cross section of the contact strip (301) is semicircular, and the contact strip (301) is in line contact with the pipe body (2) through the arc surface of the contact strip.
4. An active electronic fuel level sensor adapted for use in sensing the level of fuel in a vehicle fuel tank as claimed in claim 3, wherein: the radius of the semicircular cross section of each contact strip (301) is 1-2mm, and the distance between the round mandrels of the adjacent contact strips (301) is 3.5-4.5 mm.
5. An active electronic fuel level sensor adapted for use in sensing the level of fuel in a vehicle fuel tank as claimed in claim 1, wherein: the mounting plate (1) is a mounting flange bottom plate with a center hole.
6. An active electronic fuel level sensor adapted for use in sensing the level of fuel in a vehicle fuel tank as claimed in claim 1, wherein: the pipe body (2) is a stainless steel pipe.
7. An active electronic fuel level sensor adapted for use in sensing the level of fuel in a vehicle fuel tank as claimed in claim 1, wherein: electronic sealant (12) is filled between the interior of the pipe body (2) and the circuit board component.
8. An active electronic fuel level sensor adapted for use in sensing the level of fuel in a vehicle fuel tank as claimed in claim 1, wherein: the output voltage range of the battery (8) is DC:1.5-6V, and the battery capacity is more than or equal to 3 Ah.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010928243.7A CN112097867A (en) | 2020-09-07 | 2020-09-07 | Active electronic type oil level sensor suitable for sensing oil level of automobile oil tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010928243.7A CN112097867A (en) | 2020-09-07 | 2020-09-07 | Active electronic type oil level sensor suitable for sensing oil level of automobile oil tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112097867A true CN112097867A (en) | 2020-12-18 |
Family
ID=73757427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010928243.7A Pending CN112097867A (en) | 2020-09-07 | 2020-09-07 | Active electronic type oil level sensor suitable for sensing oil level of automobile oil tank |
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| Country | Link |
|---|---|
| CN (1) | CN112097867A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2784888Y (en) * | 2004-03-23 | 2006-05-31 | 东莞正扬电子机械有限公司 | Liquid level sensor for truck |
| CN201697696U (en) * | 2010-06-18 | 2011-01-05 | 中国石油化工股份有限公司 | Leak-detecting floater of liquid level meter |
| CN201955129U (en) * | 2011-01-05 | 2011-08-31 | 江苏桑乐数字化太阳能有限公司 | Single magnetic floater sensor |
| CN102419199A (en) * | 2011-07-29 | 2012-04-18 | 山东桑乐太阳能有限公司 | Float type water level sensor used in water heater |
| CN202814504U (en) * | 2011-12-29 | 2013-03-20 | 武汉盛硕电子有限公司 | Oil level sensor based on magnetoresistive effect |
| CN204902958U (en) * | 2015-05-05 | 2015-12-23 | 遵义天义利威机电有限责任公司 | Level sensor of car oil tank |
| CN205091029U (en) * | 2015-10-10 | 2016-03-16 | 上海世德子汽车零部件有限公司 | Oil level sensor |
| CN105675092A (en) * | 2016-03-04 | 2016-06-15 | 温州瓯云科技有限公司 | Miniature high-precision liquid level sensor |
| CN109708727A (en) * | 2019-03-04 | 2019-05-03 | 江苏多维科技有限公司 | A kind of digital liquid-level sensor based on magnetoresistive sensor crosspoint array |
| CN111006746A (en) * | 2019-11-12 | 2020-04-14 | 安庆中船柴油机有限公司 | Liquid level detection device for lubricating oil tank of diesel engine |
| CN111486929A (en) * | 2020-05-07 | 2020-08-04 | 合肥邦立电子股份有限公司 | Three-wire linear liquid level sensor based on magnetic resistance non-contact |
| CN211270067U (en) * | 2019-12-18 | 2020-08-18 | 浙江绍兴苏泊尔生活电器有限公司 | Automatic water injection heating container |
-
2020
- 2020-09-07 CN CN202010928243.7A patent/CN112097867A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2784888Y (en) * | 2004-03-23 | 2006-05-31 | 东莞正扬电子机械有限公司 | Liquid level sensor for truck |
| CN201697696U (en) * | 2010-06-18 | 2011-01-05 | 中国石油化工股份有限公司 | Leak-detecting floater of liquid level meter |
| CN201955129U (en) * | 2011-01-05 | 2011-08-31 | 江苏桑乐数字化太阳能有限公司 | Single magnetic floater sensor |
| CN102419199A (en) * | 2011-07-29 | 2012-04-18 | 山东桑乐太阳能有限公司 | Float type water level sensor used in water heater |
| CN202814504U (en) * | 2011-12-29 | 2013-03-20 | 武汉盛硕电子有限公司 | Oil level sensor based on magnetoresistive effect |
| CN204902958U (en) * | 2015-05-05 | 2015-12-23 | 遵义天义利威机电有限责任公司 | Level sensor of car oil tank |
| CN205091029U (en) * | 2015-10-10 | 2016-03-16 | 上海世德子汽车零部件有限公司 | Oil level sensor |
| CN105675092A (en) * | 2016-03-04 | 2016-06-15 | 温州瓯云科技有限公司 | Miniature high-precision liquid level sensor |
| CN109708727A (en) * | 2019-03-04 | 2019-05-03 | 江苏多维科技有限公司 | A kind of digital liquid-level sensor based on magnetoresistive sensor crosspoint array |
| CN111006746A (en) * | 2019-11-12 | 2020-04-14 | 安庆中船柴油机有限公司 | Liquid level detection device for lubricating oil tank of diesel engine |
| CN211270067U (en) * | 2019-12-18 | 2020-08-18 | 浙江绍兴苏泊尔生活电器有限公司 | Automatic water injection heating container |
| CN111486929A (en) * | 2020-05-07 | 2020-08-04 | 合肥邦立电子股份有限公司 | Three-wire linear liquid level sensor based on magnetic resistance non-contact |
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Application publication date: 20201218 |