CN102564466A - Automobile electronic accelerator position sensor - Google Patents
Automobile electronic accelerator position sensor Download PDFInfo
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- CN102564466A CN102564466A CN2011103849149A CN201110384914A CN102564466A CN 102564466 A CN102564466 A CN 102564466A CN 2011103849149 A CN2011103849149 A CN 2011103849149A CN 201110384914 A CN201110384914 A CN 201110384914A CN 102564466 A CN102564466 A CN 102564466A
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Abstract
The invention relates to an automobile electronic accelerator pedal position sensor, comprising a spin valve giant magnetoresistance 1, a PCB (printed circuit board) 2, a core frame 3, a radial magnetizing magnetic film 4, a base 5 and an explosion-proof enclosure 6. The automobile electronic accelerator pedal position sensor adopts the radial magnetizing magnetic film to substitute for magnetic steel, on the basis of the traditional electronic accelerator sensor, the magnetic steel and a magnetic steel base are made into an integrated base and adopt ceramic material, then the ceramic material is taken as a substrate, a buffer layer is grown and prepared on the surface of the substrate, a permanent magnetic film layer and a protective layer are plated on the buffer layer by adopting a sputtering film coating method under vacuum condition, and a magnetizer is used for radially magnetizing the permanent magnetic thin film layer and the protective layer. The automobile electronic accelerator pedal position sensor provided by the invention has high reliability, is easy to mount and fix and is easy to be produced on a large scale; meanwhile, magnetic thin film medium has small volume, magnetic field intensity is high, magnetic field directivity is good, and design is simple.
Description
Technical field
The present invention relates to technical field of automotive electronics, be specifically related to a kind of automobile electric gasoline throttle position transducer based on the radial magnetizing thin magnetic film
Background technology
Electronic devices and components are used among the daily life more and more.In order to satisfy people's various demands; Also bring into use a large amount of electronic devices and components that product is improved comprising traditional mechanical industry product; Same; A large amount of electronic devices and components are used in the auto manufacturing, and automobile sensor becomes electric signal to input to automobile electronic control unit the various information translation of automobilism, thereby automobile is carried out FEEDBACK CONTROL.
Position sensor of electronic accelerator pedal of automobile belongs to position transducer.Position transducer is in order to detect the displacement and the angle of mechanical organ, and its change in location along with mechanical organ produces an electric signal that thereupon changes, and in numerous auto parts and components, position transducer is extremely important.
In the past few years, hall type position transducer progressively develops.The automobile electric gasoline throttle position transducer also uses the hall formula to replace original contact position transducer gradually.When car steering person tramples E-Gas, drive rotation axis rotation in the sensor by mechanical transmission mechanism, thereby magnet steel is rotated, cause changes of magnetic field, giant magnetoresistance chip induced field changes, thereby produces required control signal.But the fixing and assembly technology of magnet steel is complicated in this sensor, and is difficult with aiming at of giant magnetoresistance chip, and the cost of magnet steel is higher, and these are all restricting the development of this kind hall type position transducer.
Summary of the invention
Technical matters to be solved by this invention is: a kind of automobile electric gasoline throttle position transducer based on the radial magnetizing thin magnetic film is provided, thereby solves the location difficulty that existing sensor uses magnet steel and magnet steel pedestal to occur, the problem that bearing accuracy is not high.
The present invention solves its technical matters and adopts following technical scheme:
Efp position transducer provided by the invention; It is a kind of automobile electric gasoline throttle position transducer based on the radial magnetizing thin magnetic film; Its structure is: in the inside of explosion-resistant enclosure, be spin valve giant magnetoresistance, pcb board, core frame, radial magnetizing thin magnetic film and turning axle from top to bottom successively; Wherein, turning axle is arranged in the inner chamber of core frame, and the end face of this turning axle is coated with the radial magnetizing thin magnetic film.
Said radial magnetizing thin magnetic film is for being the rhythmo structure of arranging from bottom to top of cushion, permanent magnetic thin film and protective seam on the backing material with the pottery, and wherein: permanent magnetic thin film is an aluminium nickel film, and the film body that cushion is processed for the Cr material, protective seam are SiO
2Film.
The thickness of said permanent magnetic thin film can be 5nm～500nm.
The thickness of said cushion can be 5nm～50 μ m.
The thickness of said protective seam can be 1nm～5 μ m.
Said radial magnetizing thin magnetic film can be processed by following method: earlier with the ceramic substrate cleaning-drying; Again mask plate is covered in the stupalith substrate surface and compresses, in vacuum tightness>=1 * 10
-4During Pa, heating ceramic material substrate to 200～400 ℃, operating air pressure is 0.2～2Pa; Through magnetron sputtering method growth Cr material cushion, aluminium nickel permanent magnetic thin film also is incubated 1 hour step by step; Then be warming up to 550～780 ℃ and carry out double annealing; Growth SiO when being cooled to room temperature
2Thinfilm protective coating; Utilize magnet charger to SiO at last
2Thinfilm protective coating magnetizes.
Said core frame, its outside can be the round platform of stairstepping, and its inside is provided with the cavity that is used to hold with supporting rotating shaft.
Said turning axle can be cap shape axle, by Rotary-table and with it the right cylinder that is connected as a single entity of bottom constitute, material is pottery or magnetic steel material.
The present invention compares with existing prior art has following main advantage:
1. simple in structure, easy for installation.
Make an integral body to magnet steel and magnet steel base, be easy to installing and locating.
2. the thin magnetic film medium has that volume is little, magnetic field intensity is big, good, the stable output signal of magnetic direction property.
Permanent magnetic thin film is an aluminium nickel film; The optional scope of thickness is between 5nm～500nm, and what giant magnetoresistance detected is the magnetic field of parallel direction, magnetic field that can not the detection of vertical direction; So magnetic direction property is better; And this structure can reduce the influence of external environment to the sensor output stability, increases the sensitivity of sensor, and through selecting film thickness and live width to regulate its sensitivity.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the stereographic map of Fig. 1.
Among the figure: 1. spin valve giant magnetoresistance; 2.PCB plate; 3. core frame; 4. radial magnetizing thin magnetic film; 5. turning axle; 6. explosion-resistant enclosure.
Embodiment
The present invention is on the basis of conventional electronic throttle sensor; Turning axle 5 by Rotary-table and with it the right cylinder that is connected as a single entity of bottom constitute, whole profile is the cap shape, makes with stupalith; Be substrate again with the stupalith; At substrate surface growing and preparing cushion, thereby under vacuum condition, adopt the sputter coating method to plate one deck permanent magnetic thin film and protective seam at cushion, last; Adopt magnet charger to its radial magnetizing, constitute automobile electric gasoline throttle position transducer thus based on the radial magnetizing thin magnetic film.
Below in conjunction with embodiment the present invention is described further, but is not limited to following said content.
Automobile electric gasoline throttle position transducer based on the radial magnetizing thin magnetic film provided by the invention; Its structure is as depicted in figs. 1 and 2: in the inside of explosion-resistant enclosure 6, be spin valve giant magnetoresistance 1, pcb board 2, core frame 3, radial magnetizing thin magnetic film 4 and turning axle 5 from top to bottom successively.Wherein, turning axle 5 is arranged in the inner chamber of core frame 3, and the end face of this turning axle is coated with radial magnetizing thin magnetic film 4.
Said stopcock giant magnetoresistance 1 can adopt the product of the TLE5011 of Infineon model, perhaps the stopcock giant magnetoresistance of other model.
Said PCB (printed circuit board (PCB)) plate 2 is signals collecting and treatment circuit plate, and giant magnetoresistance induction chip cpu circuit is housed on this circuit board.This circuit output voltage signal or current signal or CAN bus signals get into microprocessor and handle.Said core frame 3, its outside is the round platform of stairstepping, and its internal cavities is used to hold and supporting rotating shaft 5.
Said radial magnetizing thin magnetic film 4 is for being the rhythmo structure of cushion, permanent magnetic thin film and protective seam on the backing material with the pottery.Wherein, permanent magnetic thin film is an aluminium nickel film, and the optional scope of thickness is between 5nm～500nm; The film body that this cushion is processed for the Cr material, the optional scope of thickness is between 5nm～50 μ m; This protective seam is by SiO
2Be the film body material, thickness is between 1nm～5 μ m.
The preparation method of said radial magnetizing thin magnetic film 4 is: at first with the ceramic substrate cleaning-drying; Then mask plate is covered in the stupalith substrate surface and compresses, the system vacuum degree is superior to 1 * 10
-4During Pa, heating ceramic material substrate to 200～400 ℃, operating air pressure is 0.2～2Pa; Through magnetron sputtering method growth Cr material cushion, aluminium nickel permanent magnetic thin film also is incubated 1 hour step by step; Then be warming up to 550～780 ℃ and carry out double annealing; Growth SiO when being cooled to room temperature
2Thinfilm protective coating; Utilize magnet charger to SiO at last
2Thinfilm protective coating magnetizes.
Said turning axle 5, its structure is: by Rotary-table and with it the right cylinder that is connected as a single entity of bottom constitute, whole profile is the cap shape, makes with stupalith.During the pin accelerator pedal, this turning axle can rotate freely in core frame 3.
Said explosion-resistant enclosure 6 is processed by ABS resin, is used to protect whole automobile electric gasoline throttle position transducer.
Automobile electric gasoline throttle position transducer based on the radial magnetizing thin magnetic film provided by the invention, its course of work is: when car steering person tramples E-Gas, rotated by the turning axle in the mechanical transmission mechanism driving automobile E-Gas position transducer 5; Thereby thin magnetic film is rotated, cause changes of magnetic field, after gathering and handle by pcb board 2; Spin valve giant magnetoresistance 1 induced field is changed; Thereby produce required control signal and be sent to ECU, ECU carries out calculation process to this information, calculates a control signal; Deliver to the servomotor relay through circuit; Servomotor drives throttle execution mechanism, thereby controls throttle position, reaches the purpose of the control speed of a motor vehicle.
Claims (8)
1. efp position transducer; It is characterized in that a kind of automobile electric gasoline throttle position transducer based on the radial magnetizing thin magnetic film; Its structure is: the inside in explosion-resistant enclosure (6) is spin valve giant magnetoresistance (1), pcb board (2), core frame (3), radial magnetizing thin magnetic film (4) and turning axle (5) from top to bottom successively; Wherein, turning axle (5) is arranged in the inner chamber of core frame (3), and the end face of this turning axle is coated with radial magnetizing thin magnetic film (4).
2. efp position transducer according to claim 1; It is characterized in that said radial magnetizing thin magnetic film (4) is for the pottery being the rhythmo structure of arranging of cushion, permanent magnetic thin film and protective seam on the backing material from bottom to top; Wherein: permanent magnetic thin film is an aluminium nickel film; The film body that cushion is processed for
material, protective seam are
film.
3. efp position transducer according to claim 2, the thickness that it is characterized in that said permanent magnetic thin film is
.
4. efp position transducer according to claim 2, the thickness that it is characterized in that said cushion is
.
5. efp position transducer according to claim 2, the thickness that it is characterized in that said protective seam is
.
6. efp position transducer according to claim 2 is characterized in that said radial magnetizing thin magnetic film (4) processed by following method: earlier with the ceramic substrate cleaning-drying; Again mask plate being covered in the stupalith substrate surface compresses; When vacuum tightness>=
; The heating ceramic material substrate is to
, and operating air pressure is
; Through magnetron sputtering method growth
material cushion, aluminium nickel permanent magnetic thin film also is incubated 1 hour step by step; Then be warming up to
and carry out double annealing; Growth
thinfilm protective coating when being cooled to room temperature; Utilize magnet charger that
thinfilm protective coating is magnetized at last.
7. efp position transducer according to claim 1 is characterized in that said core frame (3), and its outside is the round platform of stairstepping, and its inside is provided with and is used to hold and the cavity of supporting rotating shaft (5).
8. efp position transducer according to claim 1 is characterized in that said turning axle (5) is a cap shape axle, by Rotary-table and with it the right cylinder that is connected as a single entity of bottom constitute, material is a stupalith.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110384914.9A CN102564466B (en) | 2011-11-28 | 2011-11-28 | Automobile electronic accelerator position sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110384914.9A CN102564466B (en) | 2011-11-28 | 2011-11-28 | Automobile electronic accelerator position sensor |
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| Publication Number | Publication Date |
|---|---|
| CN102564466A true CN102564466A (en) | 2012-07-11 |
| CN102564466B CN102564466B (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110384914.9A Expired - Fee Related CN102564466B (en) | 2011-11-28 | 2011-11-28 | Automobile electronic accelerator position sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017796A (en) * | 2012-12-14 | 2013-04-03 | 武汉理工大学 | Steering wheel torque angle sensor for magnetic film |
| CN107101567A (en) * | 2017-04-07 | 2017-08-29 | 亿科电气股份有限公司 | Switch cubicle actuating length fitting monitoring device based on giant magnetoresistance |
| CN109084670A (en) * | 2017-06-14 | 2018-12-25 | 日本电产三协株式会社 | Magnetic scale and magnetic encoder |
| US10449934B2 (en) | 2017-03-08 | 2019-10-22 | Mando Corporation | Pedal displacement sensor and electronic brake system comprising the same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050007105A1 (en) * | 2003-07-11 | 2005-01-13 | Henrik Siegle | Device for detecting the rotational speed and/or the position of a rotating component |
| CN2788259Y (en) * | 2005-04-15 | 2006-06-14 | 福建省电影机械厂 | Huge magnetic resistance sensor of paper money counter |
| CN2828754Y (en) * | 2005-10-26 | 2006-10-18 | 弘威科技股份有限公司 | Contactless vehicle angle sensor |
| WO2008112100A2 (en) * | 2007-03-07 | 2008-09-18 | Cts Corporation | Rotary position sensor |
| CN201311272Y (en) * | 2008-12-15 | 2009-09-16 | 银川英奥特自控有限公司 | Non-contact high-precision angle sensor |
| CN101819849A (en) * | 2010-05-12 | 2010-09-01 | 中国科学院苏州纳米技术与纳米仿生研究所 | Strong magnetic film medium and preparation method thereof |
-
2011
- 2011-11-28 CN CN201110384914.9A patent/CN102564466B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050007105A1 (en) * | 2003-07-11 | 2005-01-13 | Henrik Siegle | Device for detecting the rotational speed and/or the position of a rotating component |
| CN2788259Y (en) * | 2005-04-15 | 2006-06-14 | 福建省电影机械厂 | Huge magnetic resistance sensor of paper money counter |
| CN2828754Y (en) * | 2005-10-26 | 2006-10-18 | 弘威科技股份有限公司 | Contactless vehicle angle sensor |
| WO2008112100A2 (en) * | 2007-03-07 | 2008-09-18 | Cts Corporation | Rotary position sensor |
| CN201311272Y (en) * | 2008-12-15 | 2009-09-16 | 银川英奥特自控有限公司 | Non-contact high-precision angle sensor |
| CN101819849A (en) * | 2010-05-12 | 2010-09-01 | 中国科学院苏州纳米技术与纳米仿生研究所 | Strong magnetic film medium and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 倪新建: "自旋阀巨磁阻（GMR）芯片角度传感特性的研究", 《中国优秀硕士学位论文全文数据库信息科技辑》, 15 September 2004 (2004-09-15) * |
| 徐振华: "车用节气门位置传感器的研究", 《中国优秀硕士学位论文全文数据库信息科技辑》, 30 September 2011 (2011-09-30) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103017796A (en) * | 2012-12-14 | 2013-04-03 | 武汉理工大学 | Steering wheel torque angle sensor for magnetic film |
| US10449934B2 (en) | 2017-03-08 | 2019-10-22 | Mando Corporation | Pedal displacement sensor and electronic brake system comprising the same |
| CN107101567A (en) * | 2017-04-07 | 2017-08-29 | 亿科电气股份有限公司 | Switch cubicle actuating length fitting monitoring device based on giant magnetoresistance |
| CN109084670A (en) * | 2017-06-14 | 2018-12-25 | 日本电产三协株式会社 | Magnetic scale and magnetic encoder |
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| Publication number | Publication date |
|---|---|
| CN102564466B (en) | 2015-07-22 |
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