CN104236449A - Steering wheel angle sensor - Google Patents

Steering wheel angle sensor Download PDF

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Publication number
CN104236449A
CN104236449A CN201410477567.8A CN201410477567A CN104236449A CN 104236449 A CN104236449 A CN 104236449A CN 201410477567 A CN201410477567 A CN 201410477567A CN 104236449 A CN104236449 A CN 104236449A
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CN
China
Prior art keywords
code
wheel
magnet
angle sensor
steering
Prior art date
Application number
CN201410477567.8A
Other languages
Chinese (zh)
Inventor
肖敏
Original Assignee
三峡大学
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by 三峡大学 filed Critical 三峡大学
Priority to CN201410477567.8A priority Critical patent/CN104236449A/en
Publication of CN104236449A publication Critical patent/CN104236449A/en

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Abstract

A steering wheel angle sensor comprises a coding disk, a PCB and magnetic sensitive elements arranged on the PCB. A positioning mechanism matched with a steering shaft is arranged on the inner circumferential face of the coding disk, three code channels are formed in the outer circumferential face of the coding disk, one magnetic sensitive element is arranged on the PCB by corresponding to each code channel, and the PCB is provided with the three magnetic sensitive elements corresponding to the three code channels. Because the magnetic code channels are formed in the outer circumference of the coding disk and the magnetic sensitive elements are arranged corresponding to the code channels, the turning direction and the turning angle of the steering shaft can be sensed. The steering wheel angle sensor is simple in structure, and the radial size of the angle sensor is reduced so that the steering wheel angle sensor can be installed on the steering shaft conveniently. The magnetic sensitive elements are free of influences of dust, so that the steering wheel angle sensor has good practicality and high economical efficiency. Due to the interference fit between grooves and convex edges, the radial positioning of the coding disk relative to the steering shaft is guaranteed, and the coaxiality between the coding disk and the steering shaft in rotation is guaranteed.

Description

A kind of steering wheel angle sensor

Technical field

The present invention relates to a kind of sensor, be 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 invention provides a kind of structure simple, 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 object of the present invention is achieved like this: 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.

Steering wheel angle sensor provided by the invention, 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 1 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 invention will be further described.

Fig. 1 is structural representation of the present invention.

Fig. 2 is that sensor element of the present invention exports schematic diagram.

Wherein, A, B, C of Fig. 2 represent pulse A, pulse B and pulse C respectively.

Embodiment

Structure of the present invention 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 invention 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.
CN201410477567.8A 2014-09-19 2014-09-19 Steering wheel angle sensor CN104236449A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410477567.8A CN104236449A (en) 2014-09-19 2014-09-19 Steering wheel angle sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410477567.8A CN104236449A (en) 2014-09-19 2014-09-19 Steering wheel angle sensor

Publications (1)

Publication Number Publication Date
CN104236449A true CN104236449A (en) 2014-12-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410477567.8A CN104236449A (en) 2014-09-19 2014-09-19 Steering wheel angle sensor

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CN (1) CN104236449A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105387879A (en) * 2015-12-31 2016-03-09 哈尔滨工业大学 Absolute position magnetic encoder of large center hole axial magnetization structure

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JP2007269281A (en) * 2006-03-31 2007-10-18 Jtekt Corp Steering device
CN101115968A (en) * 2005-02-10 2008-01-30 松下电器产业株式会社 Rotation angle detection device and rotation angle correction method
CN202074985U (en) * 2011-04-25 2011-12-14 奇瑞汽车股份有限公司 Steering wheel rotary angle sensor
CN102322887A (en) * 2011-06-28 2012-01-18 奇瑞汽车股份有限公司 Rotary angle sensor for steering wheel
CN102933940A (en) * 2010-06-03 2013-02-13 Ntn株式会社 Magnetic encoder
CN103072622A (en) * 2013-02-27 2013-05-01 湖南时代卓越汽车电子技术有限公司 Steering wheel steering angle sensor device
US20130205917A1 (en) * 2010-05-14 2013-08-15 Trw Automotive Gmbh Sensor Assembly for Motor Vehicle Steering Systems
CN203595523U (en) * 2013-09-29 2014-05-14 陕西重型汽车有限公司 Novel steering wheel angle sensor
CN204064235U (en) * 2014-09-19 2014-12-31 三峡大学 A kind of steering wheel angle sensor

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101115968A (en) * 2005-02-10 2008-01-30 松下电器产业株式会社 Rotation angle detection device and rotation angle correction method
JP2007269281A (en) * 2006-03-31 2007-10-18 Jtekt Corp Steering device
US20130205917A1 (en) * 2010-05-14 2013-08-15 Trw Automotive Gmbh Sensor Assembly for Motor Vehicle Steering Systems
CN102933940A (en) * 2010-06-03 2013-02-13 Ntn株式会社 Magnetic encoder
CN202074985U (en) * 2011-04-25 2011-12-14 奇瑞汽车股份有限公司 Steering wheel rotary angle sensor
CN102322887A (en) * 2011-06-28 2012-01-18 奇瑞汽车股份有限公司 Rotary angle sensor for steering wheel
CN103072622A (en) * 2013-02-27 2013-05-01 湖南时代卓越汽车电子技术有限公司 Steering wheel steering angle sensor device
CN203595523U (en) * 2013-09-29 2014-05-14 陕西重型汽车有限公司 Novel steering wheel angle sensor
CN204064235U (en) * 2014-09-19 2014-12-31 三峡大学 A kind of steering wheel angle sensor

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105387879A (en) * 2015-12-31 2016-03-09 哈尔滨工业大学 Absolute position magnetic encoder of large center hole axial magnetization structure

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Application publication date: 20141224