CN102305873A - Vehicle speed sensor for motor vehicle - Google Patents
Vehicle speed sensor for motor vehicle Download PDFInfo
- Publication number
- CN102305873A CN102305873A CN201110132353A CN201110132353A CN102305873A CN 102305873 A CN102305873 A CN 102305873A CN 201110132353 A CN201110132353 A CN 201110132353A CN 201110132353 A CN201110132353 A CN 201110132353A CN 102305873 A CN102305873 A CN 102305873A
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- China
- Prior art keywords
- vehicle speed
- cylindrical shell
- hall device
- fixed
- barrel
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Abstract
The invention discloses a vehicle speed sensor for a motor vehicle, and relates to a sensor for measuring a vehicle speed. The vehicle speed sensor overcomes the defects that the damage rate of a sensor is high due to abrasion, and parts in the sensor are easy to loosen in the prior art, and is used for measuring the vehicle speed. The vehicle speed sensor comprises a Hall device (1), a front baffle (2) made of a copper material, a barrel (3) made of a steel material, a filtering and shaping circuit (4) and a rear baffle (5), wherein the front baffle (2) is fixed on the front end part of the barrel (3) and seals the front end of the barrel (3); the rear baffle (5) is fixed on the rear end part of the barrel (3) and seals the rear end of the barrel (3); the Hall device (1) is fixed in the barrel (3) and is adhered and fixed to the front baffle (2); and a signal output end of the Hall device (1) is connected with a signal input end of the filtering and shaping circuit (4). Because the barrel is only arranged close to a tooth crest of a change gear and is not contacted with the tooth crest, a problem of mutual abrasion can be avoided and a fault hardly occurs.
Description
Technical field
The present invention relates to a kind of sensor of measuring machine motor-car speed.
Background technology
The existing mode of measuring motor vehicle speed all is the rotating speed of speed gear in the wheel box to be delivered in the touch sensor through the turbine and worm kinematic train test the speed.Said touch sensor is made up of a Hall element and a part that is equiped with the ferromagnetism device; The part that is equiped with the ferromagnetism device is set up drive connection and rotation through the speed gear in turbine and worm kinematic train and the wheel box; Hall element maintains static; Periodically slip over Hall element through the ferromagnetism device; The umber of pulse that Hall element produces in digit's time, thus the relative rotation speed between the two obtained.But because Hall element is in contact with one another with being equiped with between the part of ferromagnetism device, so there is wear problems, the sensor spoilage is high, and lack serviceable life.
Summary of the invention
The purpose of this invention is to provide a kind of motor vehicle speed sensor, make the high defective of sensor spoilage because of there being wearing and tearing to solve prior art.It comprises the front apron 2 of hall device 1, copper material, cylindrical shell 3, filtering shaping circuit 4 and the backboard 5 of steel matter; Front apron 2 is fixed on the leading section of cylindrical shell 3 and with the sealing of the front end of cylindrical shell 3; Backboard 5 is fixed on the rearward end of cylindrical shell 3 and with the back-end closure of cylindrical shell 3; Hall device 1 is fixed in the cylindrical shell 3 and is adhesively fixed on the front apron 2, and the signal output part of hall device 1 is connected on the signal input part of filtering shaping circuit 4.
During work; The front end of cylindrical shell 3 is fixed near the tooth top of change-speed gearing 6 in the motor vehicle gearbox and relative with tooth top; Because change-speed gearing 6 is steel gears; And the tooth and the backlash of gear mass replace even variation; The cyclically-varying of ferromagnetic material that occurs after the rotation of change-speed gearing 6 and hall device 1 distance will inevitably cause that the signal of telecommunication of hall device 1 output periodically changes; Because the number of teeth of change-speed gearing 6 is certain; Export the number of teeth that the periodically variable number of times of the signal of telecommunication equals change-speed gearing 6 when hall device 1, just be equivalent to change-speed gearing 6 and make a circle.Thereby can access the number of turns that unit interval internal speed-changing gear 6 changes, and then the speed of a motor vehicle of computing machine motor-car.Near the not contact with it because middle cylinder body 3 of the present invention just places the tooth top of speed gear 6; Therefore mutual wear problems can not appear; Again because need not transmit the rotating speed of speed gear through the turbine and worm kinematic train; Saved kinematic train; Simplify the structure, the reliability of work is high.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Embodiment one: specify this embodiment below in conjunction with Fig. 1.This embodiment comprises the front apron 2 of hall device 1, copper material, cylindrical shell 3, filtering shaping circuit 4 and the backboard 5 of steel matter; Front apron 2 is fixed on the leading section of cylindrical shell 3 and with the sealing of the front end of cylindrical shell 3; Backboard 5 is fixed on the rearward end of cylindrical shell 3 and with the back-end closure of cylindrical shell 3; Hall device 1 is fixed in the cylindrical shell 3 and is adhesively fixed on the front apron 2, and the signal output part of hall device 1 is connected on the signal input part of filtering shaping circuit 4.Filtering shaping circuit 4 can be organized into square wave etc. to the sine wave of hall device 1 output and be beneficial to follow-up counting to waveform.Follow-up usage counter just can be counted waveform signal.Front apron 2 uses the non-magnet material copper, has both protected sensor internal, has avoided the magnetic hysteresis reason of permeability magnetic material to cause hall device insensitive to signals collecting again.Cylindrical shell 3 uses steel material, has both reduced cost, can also shield other electromagnetic interference (EMI).
Embodiment two: this embodiment is that hall device 1 uses back of the body magnetic hall device with the difference of embodiment one.It is wide that back of the body magnetic hall device has serviceability temperature, and the advantage that the resisting temperature interference performance is strong is suitable for bad working environment in the motor vehicle.
Embodiment three: this embodiment is that front apron 2 is an one with cylindrical shell 3 drawings with the difference of embodiment one.
Embodiment four: specify this embodiment below in conjunction with Fig. 1.This embodiment is that hall device 1 is adhesively fixed on the front apron 2 with the difference of embodiment one, and the circuit board of filtering shaping circuit 4 is adhesively fixed on the backboard 5.The like this setting avoids the car inside of motor vehicle to shake becoming flexible between each part in the sensor that is caused.
Embodiment five: specify this embodiment below in conjunction with Fig. 1.The difference of this embodiment and embodiment one is that embedding has silica gel 8 in the gap in the space sealed of front apron 2, cylindrical shell 3 and backboard 5.The like this setting avoids the car inside of motor vehicle to shake becoming flexible between each part in the sensor that is caused.
Claims (5)
1. motor vehicle speed sensor; It is characterized in that it comprises the front apron (2) of hall device (1), copper material, cylindrical shell (3), filtering shaping circuit (4) and the backboard (5) of steel matter; Front apron (2) is fixed on the leading section of cylindrical shell (3) and with the sealing of the front end of cylindrical shell (3); Backboard (5) is fixed on the rearward end of cylindrical shell (3) and with the back-end closure of cylindrical shell (3); Hall device (1) is fixed in the cylindrical shell (3) and is adhesively fixed on the front apron (2), and the signal output part of hall device (1) is connected on the signal input part of filtering shaping circuit (4).
2. motor vehicle speed sensor according to claim 1 is characterized in that hall device (1) uses back of the body magnetic hall device.
3. motor vehicle speed sensor according to claim 1 is characterized in that front apron (2) and cylindrical shell (3) drawing are one.
4. motor vehicle speed sensor according to claim 1 is characterized in that hall device (1) is adhesively fixed on the front apron (2), and the circuit board of filtering shaping circuit (4) is adhesively fixed on the backboard (5).
5. motor vehicle speed sensor according to claim 1 is characterized in that embedding has silica gel (8) in the gap in the space that front apron (2), cylindrical shell (3) and backboard (5) sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110132353A CN102305873A (en) | 2011-05-20 | 2011-05-20 | Vehicle speed sensor for motor vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110132353A CN102305873A (en) | 2011-05-20 | 2011-05-20 | Vehicle speed sensor for motor vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102305873A true CN102305873A (en) | 2012-01-04 |
Family
ID=45379751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110132353A Pending CN102305873A (en) | 2011-05-20 | 2011-05-20 | Vehicle speed sensor for motor vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102305873A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374945A (en) * | 2014-11-07 | 2015-02-25 | 上海交通大学 | Vehicle speed measurement device and method |
| CN108107230A (en) * | 2017-12-01 | 2018-06-01 | 中广核工程有限公司 | A kind of nuclear power station main pump speed measuring system and method |
| CN108548546A (en) * | 2018-04-13 | 2018-09-18 | 哈尔滨德利亚电子科技有限公司 | Carry on the back magnetic-type hall device sectional shelf-unit, magnetic steel mounting device and installation method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07270439A (en) * | 1994-03-30 | 1995-10-20 | Unisia Jecs Corp | Rotation detecting apparatus |
| EP0687914A2 (en) * | 1994-06-17 | 1995-12-20 | Caterpillar Inc. | Modular speed sensor for a rotating body |
| CN2864680Y (en) * | 2005-12-02 | 2007-01-31 | 包头稀土研究院 | Iron-matrix block amorphous rotation speed sensor |
| CN201072422Y (en) * | 2007-09-21 | 2008-06-11 | 湖南湘依铁路机车电器有限公司 | Train speed sensor |
| CN202049171U (en) * | 2011-05-20 | 2011-11-23 | 航天科技控股集团股份有限公司 | Vehicle speed sensor for automobiles |
-
2011
- 2011-05-20 CN CN201110132353A patent/CN102305873A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07270439A (en) * | 1994-03-30 | 1995-10-20 | Unisia Jecs Corp | Rotation detecting apparatus |
| EP0687914A2 (en) * | 1994-06-17 | 1995-12-20 | Caterpillar Inc. | Modular speed sensor for a rotating body |
| CN2864680Y (en) * | 2005-12-02 | 2007-01-31 | 包头稀土研究院 | Iron-matrix block amorphous rotation speed sensor |
| CN201072422Y (en) * | 2007-09-21 | 2008-06-11 | 湖南湘依铁路机车电器有限公司 | Train speed sensor |
| CN202049171U (en) * | 2011-05-20 | 2011-11-23 | 航天科技控股集团股份有限公司 | Vehicle speed sensor for automobiles |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374945A (en) * | 2014-11-07 | 2015-02-25 | 上海交通大学 | Vehicle speed measurement device and method |
| CN108107230A (en) * | 2017-12-01 | 2018-06-01 | 中广核工程有限公司 | A kind of nuclear power station main pump speed measuring system and method |
| CN108548546A (en) * | 2018-04-13 | 2018-09-18 | 哈尔滨德利亚电子科技有限公司 | Carry on the back magnetic-type hall device sectional shelf-unit, magnetic steel mounting device and installation method |
| CN108548546B (en) * | 2018-04-13 | 2020-08-28 | 哈尔滨德利亚电子科技有限公司 | Back magnetic Hall device combined support, magnetic steel mounting device and mounting method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120104 |