CN204064235U - A kind of steering wheel angle sensor - Google Patents
A kind of steering wheel angle sensor Download PDFInfo
- Publication number
- CN204064235U CN204064235U CN201420537479.8U CN201420537479U CN204064235U CN 204064235 U CN204064235 U CN 204064235U CN 201420537479 U CN201420537479 U CN 201420537479U CN 204064235 U CN204064235 U CN 204064235U
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- China
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- code
- wheel
- magnet
- sensitive element
- steering
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
A kind of steering wheel angle sensor, the magnet-sensitive element comprising code-wheel, pcb board and arrange on pcb board, the inner peripheral surface of described code-wheel is provided with the detent mechanism matched with steering axle, the outer circumference surface of code-wheel is provided with decode road, on pcb board, each group code road corresponding is all provided with magnet-sensitive element, pcb board is provided with three magnet-sensitive elements corresponding with decode road.The utility model arranges magnetic code channel on the excircle of code-wheel, and corresponding code channel is provided with magnet-sensitive element, achieve the sensing to steering axes direction and rotational angle, its structure is simple, reduce the radial dimension of rotary angle transmitter, be convenient to the installation in steering axle, and magnet-sensitive element is not by the impact of dust, has good practicality and economy; Form interference fit between groove and fin, thus ensure that the radial location of code-wheel relative to steering axle, and ensure that the alignment of code-wheel and steering axes.
Description
Technical field
The utility model relates to a kind of sensor, is specifically related to a kind of steering wheel angle sensor.
Background technology
Steering wheel angle sensor is generally arranged in the steering axle of steering column tube, when steering wheel rotation drives steering axle to move, and the angle of the direction that steering wheel angle sensor sensing steering rotates and rotation.The control module be arranged on vehicle can control the operation of vehicle associated components according to the steering axes direction of steering wheel sensor sensing and rotational angle.In prior art, steering wheel angle sensor many employings photoelectric coding principle.Usually in code-wheel radial direction, be provided with many group codes road, and corresponding code channel is provided with optic coupling element, by optic coupling element, whether corresponding numerical code is exported to the acceptance of light, thus obtain rotation direction and the angle of steering axle.But the steering wheel angle sensor radial dimension of this structure is comparatively large, complex structure, and steering axle is installed inconvenient, shock resistance is poor, and the accuracy that the optic coupling element of this steering wheel angle sensor is measured is very easily by the impact of dust, greasy dirt etc.
Summary of the invention
In order to overcome the shortcoming that prior art exists, the utility model provides a kind of structure simple, and the radial dimension of sensor is little, is convenient to the installation in steering axle, and magnet-sensitive element by the impact of dust, does not have the steering wheel angle sensor of good practicality and economy.
The purpose of this utility model is achieved in that a kind of steering wheel angle sensor, comprise code-wheel, pcb board and the magnet-sensitive element arranged on pcb board, the inner peripheral surface of described code-wheel is provided with the detent mechanism matched with steering axle, described detent mechanism is code-wheel inner peripheral surface the is disposed radially fin suitable with groove in steering axle, three code-wheel grooves of the equidistant distribution suitable with fin in steering axle that code-wheel inner peripheral surface is radially offered, and extend in parallel along the axial direction of code-wheel, article three, code-wheel groove contacts with three fins be arranged on steering axle outer circumference surface, the outer circumference surface of code-wheel is provided with decode road, is respectively the first code channel, the second code channel and decode road, each code channel comprises and is alternately distributed equal N, S magnetic pole of sector angular, wherein the sector angular of the second code channel is the twice of the sector angular of the first code channel, the sector angular in third yard road is the twice of the sector angular of the second code channel, namely a N pole pair in third yard road answers a N magnetic pole and a S magnetic pole of the second code channel, and a N pole pair of the second code channel answers a N magnetic pole and a S magnetic pole of the first code channel,
On pcb board, each group code road corresponding is all provided with magnet-sensitive element, pcb board is provided with three magnet-sensitive elements corresponding with decode road, is respectively the first magnet-sensitive element, the second magnet-sensitive element and the 3rd magnet-sensitive element.
Article three, be interference fit between code-wheel groove and fin.
Described magnet-sensitive element is Hall element, magnetoresistive element or giant magnetoresistance element.
The steering wheel angle sensor that the utility model provides, the excircle of code-wheel arranges magnetic code channel, and corresponding code channel is provided with magnet-sensitive element, achieve the sensing to steering axes direction and rotational angle, its structure is simple, reduces the radial dimension of rotary angle transmitter, is convenient to the installation in steering axle, and magnet-sensitive element by the impact of dust, does not have good practicality and economy; Form certain interference fit between groove and fin, thus ensure that the radial location of code-wheel relative to steering axle, and ensure that the alignment of code-wheel and steering axes.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is that sensor element of the present utility model exports schematic diagram.
Wherein, A, B, C of Fig. 2 represent pulse A, pulse B and pulse C respectively.
Embodiment
Structure of the present utility model is as shown in Figure 1: a kind of steering wheel angle sensor, comprise code-wheel 1, pcb board 2 and the magnet-sensitive element arranged on pcb board 2, the inner peripheral surface of described code-wheel 1 is provided with the detent mechanism matched with steering axle, described detent mechanism is the fin suitable with the groove in steering axle that code-wheel 1 inner peripheral surface is disposed radially, three code-wheel grooves 14 of the equidistant distribution suitable with fin in steering axle that code-wheel 1 inner peripheral surface is radially offered, and extend in parallel along the axial direction of code-wheel 1, article three, code-wheel groove 14 contacts with three fins be arranged on steering axle outer circumference surface, the outer circumference surface of code-wheel 1 is provided with decode road, is respectively the first code channel 11, second code channel 12 and decode road 13, each code channel comprises and is alternately distributed equal N, S magnetic pole of sector angular, wherein the sector angular of the second code channel 12 is the twice of the sector angular of the first code channel 11, the sector angular in third yard road 13 is the twice of the sector angular of the second code channel 12, namely a N pole pair in third yard road 13 answers a N magnetic pole and a S magnetic pole of the second code channel 12, and a N pole pair of the second code channel 12 answers a N magnetic pole and a S magnetic pole of the first code channel 11,
On pcb board 2, each group code road corresponding is all provided with magnet-sensitive element, pcb board 2 is provided with three magnet-sensitive elements corresponding with decode road, is respectively the first magnet-sensitive element 21, second magnet-sensitive element 22 and the 3rd magnet-sensitive element 23.
Article three, be interference fit between code-wheel groove 14 and fin.
Described magnet-sensitive element is Hall element, magnetoresistive element or giant magnetoresistance element.
Principle of work of the present utility model is as follows: when code-wheel 1 is in diverse location with steering axes, be arranged on each group code road on code-wheel 1 by corresponding two magnetic poles, namely the N magnetic pole on each code channel and S magnetic pole are alternately through corresponding magnet-sensitive element, magnet-sensitive element changes out corresponding level signal according to the magnetic signal conversion received, be arranged on the circuit board component on pcb board afterwards and form pulse output according to the level signal of each magnet-sensitive element, export the direction and angle that obtain steering axes according to pulse.Namely when code-wheel 1 is along with steering axes, the each magnet-sensitive element be arranged on pcb board 2 produces pulse simultaneously and exports, first magnet-sensitive element 21 production burst A, second magnet-sensitive element 22 production burst B, 3rd magnet-sensitive element 23 production burst C, the treatment circuit on pcb board 2 is according to pulse A, pulse B and pulse C sensing steering rotation direction and rotational angle.
Claims (3)
1. a steering wheel angle sensor, it is characterized in that: comprise code-wheel (1), pcb board (2) and the magnet-sensitive element in the upper setting of pcb board (2), the inner peripheral surface of described code-wheel (1) is provided with the detent mechanism matched with steering axle, described detent mechanism is the fin suitable with the groove in steering axle that code-wheel (1) inner peripheral surface is disposed radially, three code-wheel grooves (14) of the equidistant distribution suitable with fin in steering axle that code-wheel (1) inner peripheral surface is radially offered, and extend in parallel along the axial direction of code-wheel (1), article three, code-wheel groove (14) contacts with three fins be arranged on steering axle outer circumference surface, the outer circumference surface of code-wheel (1) is provided with decode road, is respectively the first code channel (11), the second code channel (12) and decode road (13), each code channel comprises and is alternately distributed equal N, S magnetic pole of sector angular, wherein the sector angular of the second code channel (12) is the twice of the sector angular of the first code channel (11), the sector angular in third yard road (13) is the twice of the sector angular of the second code channel (12), namely a N pole pair of third yard road (13) answers a N magnetic pole and a S magnetic pole of the second code channel (12), and a N pole pair of the second code channel (12) answers a N magnetic pole and a S magnetic pole of the first code channel (11),
All magnet-sensitive element is provided with in upper each the group code road corresponding of pcb board (2), pcb board (2) is provided with three magnet-sensitive elements corresponding with decode road, is respectively the first magnet-sensitive element (21), the second magnet-sensitive element (22) and the 3rd magnet-sensitive element (23).
2. steering wheel angle sensor according to claim 1, is characterized in that: be interference fit between three code-wheel grooves (14) and fin.
3. steering wheel angle sensor according to claim 1, is characterized in that: described magnet-sensitive element is Hall element, magnetoresistive element or giant magnetoresistance element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420537479.8U CN204064235U (en) | 2014-09-19 | 2014-09-19 | A kind of steering wheel angle sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420537479.8U CN204064235U (en) | 2014-09-19 | 2014-09-19 | A kind of steering wheel angle sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204064235U true CN204064235U (en) | 2014-12-31 |
Family
ID=52205726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420537479.8U Expired - Fee Related CN204064235U (en) | 2014-09-19 | 2014-09-19 | A kind of steering wheel angle sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204064235U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236449A (en) * | 2014-09-19 | 2014-12-24 | 三峡大学 | Steering wheel angle sensor |
-
2014
- 2014-09-19 CN CN201420537479.8U patent/CN204064235U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236449A (en) * | 2014-09-19 | 2014-12-24 | 三峡大学 | Steering wheel angle sensor |
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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: 20141231 Termination date: 20150919 |
|
| EXPY | Termination of patent right or utility model |