CN202814504U - Oil level sensor based on magnetoresistive effect - Google Patents
Oil level sensor based on magnetoresistive effect Download PDFInfo
- Publication number
- CN202814504U CN202814504U CN 201120563749 CN201120563749U CN202814504U CN 202814504 U CN202814504 U CN 202814504U CN 201120563749 CN201120563749 CN 201120563749 CN 201120563749 U CN201120563749 U CN 201120563749U CN 202814504 U CN202814504 U CN 202814504U
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- CN
- China
- Prior art keywords
- level sensor
- oil level
- circuit board
- fuel level
- steel tube
- 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.)
- Expired - Fee Related
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- Level Indicators Using A Float (AREA)
Abstract
The utility model discloses an oil level sensor based on the magnetoresistive effect. The oil level sensor converts measured liquid level changes into output signals according to a theory of controlling opening and closing of magnetic-resistance chips through a magnetic field, thereby measuring a height of the liquid level. When a floater outside a stainless steel tube is at a certain height, the magnetic-resistance chip at the corresponding position is trigger to be conductive, measures the position of the floater, converts the position into a current signal and outputs the signal. A circuit board is sealed in the stainless steel tube and sensor components do not contact the liquid, which enables the oil level sensor to be high in corrosion resistance, safe and reliable.
Description
Technical field
The utility model is applied to the vehicle body fittings technical field.Various vehicles all can be used.
Background technology
The sensor of measuring the fuel level in tank height in the existing vehicle mainly is the dry-reed fuel level sensor, is resistance signal output.It converts resistance signal to the curtage signal by external change-over circuit.Tongue tube causes damage occurring easily in assembling, welding process, thereby affects its reliability owing to its glass package structure.Tongue tube is mechanical structure, and its serviceable life, anti-vibration ability are not as semi-conductor electronic device.
The reluctance type fuel level sensor, highly sensitive, long service life, anti-vibration, the stability, reliability and the signal dirigibility that have improved sensor.Both can directly export the current signal of two-wire system, also can export three-wire system current or voltage signal, need not additional any conversion facility.Do not produce electric spark, be adapted at using in the various fuel oils.
Summary of the invention
The present invention is a kind of principle of utilizing magnetic field control magnetic resistance chip break-make, measured oil level is changed converting electric signal output to, thereby measures the sensor of level height.
The present invention mainly is comprised of stainless-steel tube, float, magnet steel, circuit board, magnetic resistance chip sequence, method pulling plate and O-ring seal.Wherein float is enclosed within on the stainless-steel tube, is fixed with magnet steel in the float.The magnetic resistance chip sequence is arranged on the circuit board.When float is in certain altitude, trigger the magnetic resistance chip conducting of relevant position, thereby detect the float present position, convert current signal output to.Circuit board uses 2 lines electric current output mode processed, and directly output current signal need not to use card extender.Circuit board is sealed in the stainless-steel tube by O-ring seal, and with the fuel oil isolation, decay resistance is strong, and is safe and reliable.Ring flange is fixed on upper end in the fuel tank with fuel level sensor.
The purpose of this utility model is to increase reliability, raising performance, reduction cost.
Description of drawings
Fig. 1. the fuel level sensor structural representation.
Fig. 2. fuel level sensor board structure of circuit synoptic diagram.
Embodiment
By reference to the accompanying drawings the utility model is described further, so that more be well understood to the technical solution of the utility model and advantage.
See figures.1.and.2, magnetic resistance chip (6) on the circuit board (7) is transducing part of the present utility model, when oil level changes, cause that float (3) slides at stainless-steel tube (2), cause magnet steel (4) fixing in the float to produce changes of magnetic field, thereby trigger the conducting of correspondence position magnetic resistance chip.The change in location of conducting magnetic resistance chip is by circuit conversion and carry out accurate linearity and temperature compensation, output 4～20mA standard signal supply vehicle instrument.The circuit board end has O-ring seal (5), prevents former device contact oil plant.Ring flange (1) is fixed on upper end in the fuel tank with fuel level sensor.
The content that is not described in detail in this instructions belongs to the known prior art of this area professional and technical personnel.
Claims (3)
1. fuel level sensor based on magnetoresistance, it is characterized in that, be fixed with magnet steel (4) in the float (3), welded magnetic resistance chip sequence (6) on the circuit board (7), circuit board (7) is sealed in the stainless-steel tube (2), circuit board (7) end has O-ring seal (5), and ring flange (1) is fixed on upper end in the fuel tank with fuel level sensor.
2. fuel level sensor according to claim 1 is characterized in that the electric current output processed of 2 lines.
3. fuel level sensor according to claim 1 is characterized in that without card extender, Direct Current output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120563749 CN202814504U (en) | 2011-12-29 | 2011-12-29 | Oil level sensor based on magnetoresistive effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120563749 CN202814504U (en) | 2011-12-29 | 2011-12-29 | Oil level sensor based on magnetoresistive effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202814504U true CN202814504U (en) | 2013-03-20 |
Family
ID=47873364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120563749 Expired - Fee Related CN202814504U (en) | 2011-12-29 | 2011-12-29 | Oil level sensor based on magnetoresistive effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202814504U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014114259A1 (en) * | 2013-01-25 | 2014-07-31 | 江苏多维科技有限公司 | Digital liquid-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 |
| CN106092273A (en) * | 2016-08-11 | 2016-11-09 | 东莞正扬电子机械有限公司 | Liquid-level detecting method and liquid level sensor |
| 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 |
| CN112097867A (en) * | 2020-09-07 | 2020-12-18 | 合肥康特微科技有限公司 | Active electronic type oil level sensor suitable for sensing oil level of automobile oil tank |
| CN112268035A (en) * | 2020-10-22 | 2021-01-26 | 江苏徐工工程机械研究院有限公司 | Hydraulic cylinder elongation detection device |
-
2011
- 2011-12-29 CN CN 201120563749 patent/CN202814504U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014114259A1 (en) * | 2013-01-25 | 2014-07-31 | 江苏多维科技有限公司 | Digital liquid-level sensor |
| US11035716B2 (en) | 2013-01-25 | 2021-06-15 | MultiDimension Technology Co., Ltd. | Digital liquid-level sensor having at least one tunneling magnetoresistance switch |
| CN105675092A (en) * | 2016-03-04 | 2016-06-15 | 温州瓯云科技有限公司 | Miniature high-precision liquid level sensor |
| CN106092273A (en) * | 2016-08-11 | 2016-11-09 | 东莞正扬电子机械有限公司 | Liquid-level detecting method and liquid level sensor |
| CN106092273B (en) * | 2016-08-11 | 2022-08-02 | 东莞正扬电子机械有限公司 | Liquid level detection method and liquid level sensor |
| 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 |
| CN111486929B (en) * | 2020-05-07 | 2022-03-08 | 合肥邦立电子股份有限公司 | Three-wire linear liquid level sensor based on magnetic resistance non-contact |
| CN112097867A (en) * | 2020-09-07 | 2020-12-18 | 合肥康特微科技有限公司 | Active electronic type oil level sensor suitable for sensing oil level of automobile oil tank |
| CN112268035A (en) * | 2020-10-22 | 2021-01-26 | 江苏徐工工程机械研究院有限公司 | Hydraulic cylinder elongation detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130320 Termination date: 20181229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |