CN101331049A - Steering angle sensing apparatus and method thereof - Google Patents
Steering angle sensing apparatus and method thereof Download PDFInfo
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- CN101331049A CN101331049A CNA2007800007136A CN200780000713A CN101331049A CN 101331049 A CN101331049 A CN 101331049A CN A2007800007136 A CNA2007800007136 A CN A2007800007136A CN 200780000713 A CN200780000713 A CN 200780000713A CN 101331049 A CN101331049 A CN 101331049A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D15/00—Steering not otherwise provided for
- B62D15/02—Steering position indicators ; Steering position determination; Steering aids
- B62D15/021—Determination of steering angle
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
A steering angle sensing apparatus and method are provided. The apparatus and method sense the steering angle of a steering shaft by using a rotated bit value difference corresponding to the rotated angles of magnets, which are respectively coupled on an axis of one of a plurality of sub gears, when the sub gears with respectively different gear ratios rotate with a shaft gear that rotates together with the steering shaft.
Description
Technical field
The present invention relates to deflection angle sensing device and deflection angle method for sensing.
Background technology
As the indispensable part of power actuated vehicle, steering hardware is the mechanism that changes power actuated vehicle running route and direction according to the chaufeur hope.This steering hardware comprises: by the bearing circle of chaufeur control; Be connected to the steering shaft that turns to input that bearing circle is used to transmit chaufeur; And the sensing device that is installed in the angle (deflection angle) that is used for the sensing bearing circle on the steering shaft.
Typically, being connected to the bearing circle of steering shaft can cw and rotate counterclockwise 2 to 3 circles.Need accurately to detect the rotation direction of steering shaft and the rotation direction sensor of deflection angle.
Summary of the invention
The invention provides a kind of deflection angle sensing device and method, it can carry out digital processing by the pivot angle to the magnet of the axle that is coupled to a plurality of secondary gears that driven by shaft gear and detect absolute steering angle.
The invention provides a kind of deflection angle sensing device and method, it can digital processing reduces because signal changes the possibility of makeing mistakes that produces by carrying out after the pivot angle of a plurality of magnet of sensing.
An embodiment provides a kind of deflection angle sensing device, comprising: shaft gear, and it is coupled to steering shaft; First secondary gears, it rotates with shaft gear; The second subprime gear, itself and first level gear mesh, and have the transmitting ratio different with the transmitting ratio of first secondary gears; First magnet, its coupling are associated on the axle of first secondary gears; And second magnet, its coupling is associated on the axle of second subprime gear.
An embodiment provides a kind of deflection angle sensing device, comprising: first magnet, and it rotates with the gear that is coupled to the steering shaft gear; Second magnet, it rotates with the rotation period different with first magnet; The first angular detection part, its output is rotated bit value with the changes of magnetic field of first magnet that rotates corresponding first; The second angular detection part, its output is rotated bit value with the changes of magnetic field of second magnet that rotates corresponding second; And the deflection angle calculating section, it utilizes first of first angular detection part to rotate second of bit value and second angular detection part and rotates the difference between the bit value and calculate deflection angle.
An embodiment provides a kind of deflection angle method for sensing, comprising: rotate the shaft gear that is coupled to steering shaft; Along with shaft gear rotates a plurality of transmitting ratios different secondary gears mutually; Output correspondingly, with the corresponding rotation bit value of changes of magnetic field of a plurality of magnet, described a plurality of magnet coupling respectively are associated on the axle of each secondary gears; And the difference of the rotation bit value by utilizing described a plurality of magnet obtains the deflection angle of steering shaft.
Be according to the deflection angle sensing device of above-mentioned structure of the present invention and the advantage of deflection angle method for sensing, utilization is exported the simple computation that the pivot angle of a plurality of magnet (these magnet rotate with different speed respectively along with the rotation of shaft gear) carries out by digitalisation, can detect absolute steering angle.
And, owing to do not have the switching process of analog signal to digital signal, thereby can reduce to occur in the signal conversion process wrong possibility.
In addition,, improved reliability and processing speed because there is not signal conversion process, and owing to do not need A/D converter, thereby can cost-cutting.
And, less deflection angle sensing device can be provided.
In addition, can provide a kind of sensor of combination, this sensor sensing deflection angle and deflection angle moment of torsion.
Description of drawings
Fig. 1 is the block diagram according to the deflection angle sensing device of first embodiment.
Fig. 2 is the block diagram according to the deflection angle sensing device of second embodiment.
Fig. 3 is the block diagram according to the deflection angle sensing device of the 3rd embodiment.
Fig. 4 is the block diagram according to the deflection angle sensing device of the 4th embodiment.
Fig. 5 is the block diagram according to the deflection angle sensing device of the 5th embodiment.
Fig. 6 is the block diagram that turns to an angle transducer and a deflection angle calculating unit among Fig. 1.
Fig. 7 illustrates the diagram of curves that value that utilization partly exports according to the angular detection in the aforementioned deflection angle sensing embodiment derives the example of deflection angle, the value of the wherein said output value that to be described angular detection part export based on the rotation of two shaft gears.
Fig. 8 is the diagram of circuit according to the deflection angle method for sensing of first embodiment.
Fig. 9 is the diagram of circuit according to the deflection angle method for sensing of second embodiment.
The specific embodiment
To describe preferred implementation of the present invention in detail now, the embodiment of these embodiments is shown in the drawings.In institute's drawings attached, will use identical Reference numeral to represent same or analogous member as much as possible.
Fig. 1 is the block diagram according to the deflection angle sensing device of first embodiment.
With reference to Fig. 1, deflection angle sensing device 200 comprises shaft gear 220, first secondary gears 230, first magnet 231, second subprime gear 240, second magnet 241, the first angular detection part 251, the second angular detection part 252 and the deflection angle calculating section 255 that is coupled to steering shaft 100.
Deflection angle sensing device 200 can be arranged in shell 201 and the lid 202.Shaft gear 220, first secondary gears 230, first magnet 231, second subprime gear 240 and second magnet 241 are arranged on the inboard of shell 201.The inboard of lid 202 is provided with circuit card 250, and the first angular detection part 251, the second angular detection part 252 and deflection angle calculating section 255 are arranged on this circuit card.Here, deflection angle calculating section 255 can be arranged on another circuit card.
When pilot control bearing circle (not shown), move through steering shaft 100 and be delivered to shaft gear 220.Shaft gear 220 is coupled to the periphery of steering shaft 100, and rotates with steering shaft 100.Here, shaft gear 220 can directly be coupled to steering shaft 100 or pass through the output shaft 210 couplings connection of steering torque sensor 203, and is not limited to this two kinds of situations.
Described steering torque sensor comprises torque sensor (not shown), torsion bar (not shown) and is installed in output shaft 210 in the shell 201.
First secondary gears 230 and second subprime gear 240 are engaged to shaft gear 220 respectively, and rotate with shaft gear 220.First secondary gears 230 has different transmitting ratios with second subprime gear 240, and the transmitting ratio of first secondary gears 240 can be greater than the transmitting ratio of first secondary gears 230.For example, when shaft gear 220 rotated a circle, first secondary gears 230 can be rotated than second subprime gear more than 240.
For example, if the transmitting ratio of shaft gear 220, first secondary gears 230 and second subprime gear 240 is 1: 8: 7.5, then when shaft gear 220 rotated a circle, first secondary gears 230 was rotated 8 circles, and the second subprime gear rotates 7.5 circles.Two secondary gears are not limited thereto, and the transmitting ratio of second subprime gear can be greater than the transmitting ratio of first secondary gears.
The first angular detection part 251 faces first magnet, 231, the second angular detection parts 252 with uniform distance and faces second magnet 241 with uniform distance.Here, the spacing between two angular detection parts 251 and 252 and two magnet 231 and 241 can be identical or different.
The first angular detection part 251 and the second angular detection part 252 are installed on the circuit card 250, and can be formed by rotary HALL-IC (IC) respectively.Rotary Hall IC comprises at least one magneto-dependent sensor.This rotary Hall IC sensor detects the changes of magnetic field that produces along with the rotation of corresponding magnet 231 and 241 in real time, and converts detected magnetic field value to digital value with output.
The first angular detection part 251 and the second angular detection part 252 detect the changes of magnetic field that first magnet 231 and second magnet 241 produce along with the rotation of shaft gear 220 respectively, and output and the corresponding digital data of changes of magnetic field that detected.
Deflection angle calculating section 255 at first calculates the difference between the digital data of the digital data of the first angular detection part 251 and the second angular detection part 252, detects the corresponding absolute steering angle of difference with this digital data then.Here, even turn off power supply and reopen, absolute steering angle also can accurately detect the knuckle section of motor vehicle steering wheel.For this purpose, circuit card 250 also can comprise the storage area (not shown), to be used to store the rotation bit value and the deflection angle of the first angular detection part 251 and the second angular detection part 252.
The operation of above-mentioned deflection angle sensing device 200 can be described below.
When the driver's operation bearing circle, the steering shaft 100 that is connected to bearing circle rotates.When steering shaft 100 rotated, shaft gear 220 rotated with axle.First secondary gears 230 that has different drive ratios is respectively rotated with different speed under the effect of shaft gear 220 with second subprime gear 240.
Here, coupling is associated in the rotation that first magnet 231 on 230 of first secondary gears and coupling be associated in second magnet 241 on 240 of the second subprime gears and makes their magnetic field change.For example, first and second magnet 231 and 241 separately N and the position of the S utmost point change along with the rotation of first and second secondary gears 230 and 240.
The first angular detection part 251 detects pivot angle by the changes of magnetic field of first magnet 231, and will output to deflection angle calculating section 255 with the corresponding first rotation bit value of this pivot angle.
The second angular detection part 252 detects pivot angle by the changes of magnetic field of second magnet 241, and will output to deflection angle calculating section 255 with the corresponding second rotation bit value of this pivot angle.
After deflection angle calculating section 255 has calculated first of the first angular detection part 251 and rotates second deviation of rotating between the bit value of the bit value and the second angular detection part 252, utilize difference between the rotation bit value that is calculated to detect the deflection angle of steering shaft 100.Describe the detection of deflection angle after a while in detail with reference to Fig. 6 and Fig. 7.
Fig. 2 is the block diagram according to the deflection angle sensing device of second embodiment.Similar element is marked with similar Reference numeral in second embodiment and first embodiment, and will not carry out the description of repetition to it.
With reference to Fig. 2, deflection angle sensing device 200 comprises first secondary gears 330 that is engaged to shaft gear 220 and the second subprime gear 340 that is engaged to first secondary gears 330.First secondary gears 330 has different transmitting ratios respectively with the second subprime gear, and the transmitting ratio of second subprime gear 340 can be greater than the transmitting ratio of first secondary gears 330.
The axle of first secondary gears 330 is gone up coupling and is joined first magnet 331, and the axle of second subprime gear 340 is gone up coupling and joined second magnet 341.Here, because second subprime gear 340 and 330 engagements of first secondary gears, so the distance between first magnet 331 and second magnet 341 diminishes.Correspondingly, also diminish towards first angular detection part 251 of first magnet 331 and second magnet 341 and the distance between the second angular detection part 252.Thereby, can reduce the size of circuit card 250, and deflection angle sensing device 200 also can be done forr a short time.
Changes of magnetic field when the first angular detection part 251 and second angular detection part 252 sensings, first magnet 331 and second magnet 341 rotate, and export the digital data relevant respectively with changes of magnetic field.Deflection angle calculating section 255 utilize the first and second angular detection parts 251 and 252 output data difference and detect deflection angle.
Fig. 3 is the block diagram according to the deflection angle sensing device of the 3rd embodiment.Similar element is marked with similar Reference numeral in the 3rd embodiment and first embodiment, and will not carry out the description of repetition to it.
With reference to Fig. 3, deflection angle sensing device 200 has: first secondary gears 430 that is meshed with shaft gear 220; And the second subprime gear 440 that is meshed with connection gear 432 on being formed at first secondary gears, 430 1 sides.
The axle of first secondary gears 430 and connection gear 432 is gone up coupling and is joined first magnet 431, and the axle of second subprime gear 440 is gone up coupling and joined second magnet 441.Here, the distance between first magnet 431 and second magnet 441 is less than the distance in first embodiment, thereby the distance between the first angular detection part 251 and the second angular detection part 252 diminishes.Thereby, can reduce the size of circuit card 250, and deflection angle sensing device 200 can be done forr a short time.
The first angular detection part 251 and the second angular detection part 252 detect the changes of magnetic field that produces along with the rotation of first magnet 431 and second magnet 441, and the output digital data relevant with changes of magnetic field.Deflection angle calculating section 255 utilizes the difference between the output data of the first and second angular detection parts 251 and 252 to detect deflection angle.
Fig. 4 is the block diagram according to the deflection angle sensing device of the 4th embodiment.Similar element is marked with similar Reference numeral in the 4th embodiment and first embodiment, and will not carry out the description of repetition to it.
With reference to Fig. 4, in deflection angle sensing device 200, connection gear 520 and shaft gear 220 engagements, and first and second secondary gears 530 and 540 are engaged to connection gear 520.
Here, on the axle of connection gear 520 magnet is not set, and the axle coupling of first secondary gears 530 and second subprime gear 540 is associated with first magnet 531 and second magnet 541.In the 4th embodiment, not direct and shaft gear 220 engagements of first and second secondary gears 530 and 540, but mesh indirectly by connection gear 520.
And the transmitting ratio of first secondary gears 530 is less than the transmitting ratio of second subprime gear 540.Connection gear 520 is rotated along with the rotation of shaft gear 220; First and second secondary gears 530 and 540 are also rotated along with the rotation of connection gear 520.
Here, the changes of magnetic field when the first angular detection part 251 and the second angular detection part 252 detect first magnet 531 and 541 rotations of second magnet, and export the digital data relevant respectively with changes of magnetic field.Deflection angle calculating section 255 utilizes difference between the output data of the first and second angular detection parts 251 and 252 to detect deflection angle.
Fig. 5 is the block diagram according to the deflection angle sensing device of the 5th embodiment.Similar element is marked with similar Reference numeral in the 5th embodiment and first embodiment, and will not carry out the description of repetition to it.
With reference to Fig. 5, in deflection angle sensing device 200, first secondary gears 630 is engaged to the periphery of shaft gear 220, and second subprime gear 640 is engaged to the interior week of first secondary gears 630.Thereby the transmitting ratio of first secondary gears 630 is greater than the transmitting ratio of second subprime gear 640.
First secondary gears 630 and second subprime gear 640 the axle on respectively coupling join first magnet 631 and second magnet 641.Here, the size of the second subprime gear 640 and first magnet 631 can be made for and make the magnet 631 of winning can not cover second subprime gear 640.
And the distance between first magnet 631 and the first angular detection part 251 can be different with the distance between second magnet 641 and the second angular detection part 252.
Here, the first and second angular detection parts 251 and 252 detect the changes of magnetic field that produces along with the rotation of first and second magnet 631 and 641, and export the digital data relevant with magnetic field respectively.Deflection angle calculating section 255 utilizes the difference by the digital data of the first and second angular detection parts 251 and 252 outputs to detect deflection angle.
Fig. 6 is the block diagram that turns to an angle transducer and a deflection angle calculating unit among Fig. 1.
With reference to Fig. 6, the first angular detection part 251 detects first pivot angle according to rotating the changes of magnetic field that produces with first magnet 231, and exports first and rotate bit value (S1) conduct and the cooresponding digital data of this pivot angle.
The second angular detection part 252 detects second pivot angle by rotating the changes of magnetic field that produces with second magnet 241, and exports second and rotate bit value (S2) conduct and the cooresponding digital data of second pivot angle.
Deflection angle calculating section 255 rotates from first and deducts second the bit value S1 and rotate bit value S2, obtaining the rotating bit deviation, and will rotate the bit deviation and the predetermined gain value multiplies each other, thus the deflection angle of detection bearing circle and steering shaft.Here, rotate bit value, rotation bit deviation, yield value and deflection angle and be stored in the storage area (not shown), and be provided for deflection angle calculating section 255.
Deflection angle can be pushed away by following formula 1.
Formula 1
θ＝δS×G，
Wherein, θ is a deflection angle, δ S=S1-S2, and 0≤δ S≤2
n-1, G is a yield value.
S1 is the first rotation bit value, and its pivot angle with first magnet 231 that is recorded by the first angular detection part 251 is corresponding; S2 is the second rotation bit value, and its pivot angle with second magnet 241 that is recorded by the second angular detection part 252 is corresponding.
Here, δ S is the difference that the first rotation bit value S1 and second rotates bit value S2, and its maxim is 2
n-1, minimum value is 0." n " is the digital output bit number of angular detection part.
Yield value G is according to the difference of the transmitting ratio between shaft gear, first secondary gears and the second subprime gear and rotates bit and default value.
In this embodiment, shaft gear is coupled to steering shaft, and a plurality of secondary gears of the rotating drive of shaft gear and a plurality of magnet rotated with the different cycles.And a plurality of angular detection parts 251 and 252 are according to the changes of magnetic field of a plurality of magnet 231 and 241 and output digital data, and deflection angle calculating section 255 utilizes the difference of digital data to detect the absolute steering angle of steering shaft.Thereby the deflection angle calculating section can directly utilize the digital data of being exported to detect deflection angle apace, thereby improves reliability and shorten the processing time.
Fig. 7 illustrates the diagram of curves that value that utilization partly exports according to the angular detection in the aforementioned deflection angle sensing embodiment derives the example of deflection angle, the value of the wherein said output value that to be described angular detection part export based on the rotation of two shaft gears.
The x axle is represented deflection angle among Fig. 7, and the steering locking angle from a latched position to another latched position (being bearing circle forwards the conter clockwise end position to from the cw end position situation) can be set at 1800 °.The y axle is represented the output valve of angular detection partial sum deflection angle calculating section.
With reference to Fig. 6 and Fig. 7, rotate bit value S1 in order to obtain first, behind the pivot angle of first magnet 231 that obtains linearly according to rotation period to be detected by the first angular detection part 251, the pivot angle of each rotation period promptly becomes first and rotates bit value S1.
Rotate bit value S1 in order to obtain second, behind the pivot angle of second magnet 232 that obtains linearly according to rotation period to be detected by the second angular detection part 252, the pivot angle of each rotation period promptly becomes second and rotates bit value S2.
Here, because the difference of transmitting ratio, rotation period exists different.That is, have difference between the rotation period of first magnet 231 and second magnet 232, and this difference can obtain from first difference of rotating between the bit value S1 and the second rotation bit value S2.
First and second magnet 231 and 232 rotation bit value S1 and S2 are defined as respectively and rotate bit number 2
nPeriodic regime (0～2
n-1) Nei different value.
Rotate bit difference (δ S) and on figure, be expressed as a curve that increases with invariable slope along with the rotation of steering shaft.That is, first difference of rotating between the bit value S1 and the second rotation bit value S2 is calculated as rotating bit difference (δ S).Here, rotate bit difference (δ S) less than 0, then δ S or S1 are added the rotation bit number 2 of one-period if detect
n
To rotate bit difference (δ S) and multiply each other, and can obtain deflection angle (θ) with yield value.For example, when rotating bit difference (δ S) when being 3.6 for 200bit and gain, can following acquisition deflection angle: 200 * 3.6=720 °.
Fig. 8 is the diagram of circuit according to the deflection angle method for sensing of first embodiment.
With reference to Fig. 8, shaft gear rotates by the rotation of steering shaft, and first and second secondary gears that have different drive ratios are respectively rotated along with the rotation of shaft gear.Here, in S101, first and second magnet that coupling is associated on the axle of first and second secondary gears rotate.The transmitting ratio of first secondary gears is less than the transmitting ratio of second subprime gear.
When the changes of magnetic field of first and second magnet, in S103, first and second angular detection part is exported first and second according to the changes of magnetic field of first and second magnet and is rotated bit value S1 and S2 as pivot angle.
In S105, rotate bit value S1 and S2 when being input in the deflection angle calculating section when first and second, rotate from first and deduct second the bit value S1 and rotate bit value S2, and obtain rotating bit difference (δ S).In S107, determine that whether resulting rotation bit difference (δ S) is more than or equal to 0.Here, the rotation bit value that deducts the magnet with longer rotation period by the rotation bit value by the magnet with shorter rotation period obtains to rotate bit difference (δ S).
If determine to rotate the bit difference more than or equal to 0 in S107, then this difference and yield value (G) multiply each other, with acquisition deflection angle (θ=δ S * G).Here, yield value is a preset value.
If difference is less than 0, then in S109, with the bit number (2 of one-period
n) be added to first and rotate bit value (S1), and will revise first rotate bit value and second and rotate bit value and subtract each other, return S105 to obtain rotation bit difference (δ S).
Fig. 9 is the diagram of circuit according to the deflection angle method for sensing of second embodiment.
With reference to Fig. 9, shaft gear rotates by the rotation of steering shaft, and first and second secondary gears with different drive ratios are rotated along with the rotation of shaft gear.Here, in S121, first and second magnet that coupling is associated on the axle of first and second secondary gears rotate.The transmitting ratio of first secondary gears is less than the transmitting ratio of second subprime gear.
When the changes of magnetic field of first and second magnet, in S123, first and second angular detection are partly exported and the pivot angle of first and second magnet corresponding first and second rotates bit value S1 and S2.
In S125, rotate bit value S1 and S2 when being input in the deflection angle calculating section when first and second, rotate bit value S1 by first and deduct second and rotate bit value S2, to obtain rotating bit difference (δ S).In S127, whether determine to rotate the bit difference more than or equal to 0.
If rotate the bit difference, this difference and yield value (G) are multiplied each other, with acquisition deflection angle (θ=δ S * G) more than or equal to 0.Here, yield value is a preset value.
If difference less than 0, then in S129, adds the bit number (2 of one-period on the rotation bit difference that is obtained
n), rotate the bit difference to revise, and in S131, obtain deflection angle.
Although invention has been described and diagram with reference to preferred implementation of the present invention, it will be obvious to those skilled in the art that under situation without departing from the spirit and scope of the present invention to access various remodeling and modification.Therefore, the present invention attempts to cover these remodeling relevant of the present invention and the modification that falls in claims and the equivalents scope thereof.
Industrial applicibility
In the embodiment of the application's deflection angle sensing device and method, by changes of magnetic field (i.e. the changes of magnetic field of the magnet that rotates with different cycles respectively along with the rotation of the shaft gear that is coupled to bearing circle) is output as digital data, can utilize simple calculating to obtain absolute steering angle, have very high industrial applicibility.
And, owing to do not need analog signal conversion is become digital signal, thereby reduced the probability of makeing mistakes of transition period.
And, owing to do not have signal conversion process, thereby improved reliability and processing speed, and reduced price owing to having saved A/D converter.
In addition, can provide less deflection angle sensing device.
And, the high-mobility, multipurpose, wheeled vehicle rotation direction sensor that the deflection angle sensing device is combined with the moment of torsion sensing device can be provided.
Claims (25)
1, a kind of deflection angle sensing device comprises:
Shaft gear, it is coupled to steering shaft;
First secondary gears, it rotates with described shaft gear;
The second subprime gear, itself and described first level gear mesh, and transmitting ratio is different with the transmitting ratio of described first secondary gears;
First magnet, its coupling are associated on the axle of described first secondary gears; And
Second magnet, its coupling are associated on the axle of described second subprime gear.
2, deflection angle sensing device as claimed in claim 1, wherein, the transmitting ratio of described first secondary gears is less than the transmitting ratio of described second subprime gear.
3, deflection angle sensing device as claimed in claim 1, wherein, described second subprime gear mesh is to the periphery or the interior week of described first secondary gears.
4, deflection angle sensing device as claimed in claim 1 comprises connection gear, and described connection gear is formed at a side of described first secondary gears, and with described second subprime gear mesh.
5, deflection angle sensing device as claimed in claim 1, wherein, described first magnet and described second magnet comprise the permanent magnet with at least two utmost points.
6, deflection angle sensing device as claimed in claim 1, comprise the first angular detection partial sum, the second angular detection part, the two separates within a predetermined distance with described first magnet and described second magnet respectively, and the corresponding rotation bit value of pivot angle of output and described first magnet and described second magnet respectively.
7, deflection angle sensing device as claimed in claim 6, wherein, described second angular detection of the described first angular detection partial sum partly is rotary HALL-IC.
8, deflection angle sensing device as claimed in claim 7, comprise the deflection angle calculating section, described deflection angle calculating section calculates the difference between the rotation bit value that described second angular detection of the described first angular detection partial sum partly exports, and the difference between the rotation bit value that will calculate multiplies each other with fixing yield value, to obtain absolute steering angle.
9, deflection angle sensing device as claimed in claim 8, wherein, described deflection angle calculating section calculates difference between the described rotation bit value by deducted the rotation bit value that has the magnet of longer rotation period in described first magnet and described second magnet by the rotation bit value that has the magnet of shorter rotation period in described first magnet and described second magnet.
10, deflection angle sensing device as claimed in claim 8, wherein, when the difference between the described rotation bit value is 0, described deflection angle calculating section is added to the bit number of one-period on the rotation bit value of the magnet that has shorter rotation period in described first magnet and described second magnet, perhaps is added on the difference between the described rotation bit value.
11, deflection angle sensing device as claimed in claim 8, wherein, the difference between the described rotation bit value satisfies: difference≤2 between 0≤rotation bit value
n-1, wherein 2
nBe the digital bit number of one-period, n is a figure place.
12, deflection angle sensing device as claimed in claim 8 comprises memory device, and described memory device is used for storing rotation bit value, rotation bit difference, yield value and the deflection angle of input at described deflection angle calculating section.
13, deflection angle sensing device as claimed in claim 1, wherein, described shaft gear coupling is associated in the periphery of the output shaft of steering torque sensor device.
14, a kind of deflection angle sensing device comprises:
First magnet, it rotates with the gear that is coupled to the steering shaft gear;
Second magnet, it rotates with the rotation period different with described first magnet;
The first angular detection part, its output is rotated bit value with the changes of magnetic field of first magnet that rotates corresponding first;
The second angular detection part, its output is rotated bit value with the changes of magnetic field of second magnet that rotates corresponding second; And
The deflection angle calculating section, it utilizes first of described first angular detection part to rotate second of bit value and described second angular detection part and rotates the difference between the bit value and calculate deflection angle.
15, deflection angle sensing device as claimed in claim 14 comprises first secondary gears, described first secondary gears and the engagement of described shaft gear, and the last coupling of its axle joins described first magnet.
16, deflection angle sensing device as claimed in claim 15 comprises the second subprime gear, described second subprime gear and described first level gear mesh, and have and the different transmitting ratio of described first secondary gears, and the last coupling of its axle joins described second magnet.
17, deflection angle sensing device as claimed in claim 15, wherein, described second subprime gear mesh is to the interior week or the periphery of described first secondary gears.
18, deflection angle sensing device as claimed in claim 15 comprises connection gear, and described connection gear is formed at a side of described first secondary gears, and with axle on coupling joined the gear mesh of described second magnet.
19, deflection angle sensing device as claimed in claim 14 comprises:
Level gear for the third time, it meshes with described shaft gear; And
First secondary gears and second subprime gear, its respectively with the periphery engagement of the described gear of level for the third time, and comprise that respectively coupling is associated in described first magnet and described second magnet on the axle separately, and have different transmitting ratios respectively.
20, deflection angle sensing device as claimed in claim 15, wherein, described deflection angle calculating section obtains to rotate the bit difference by deducting the rotation bit value that has the magnet of longer rotation period in described first magnet and described second magnet by the rotation bit value that has the magnet of shorter rotation period in described first magnet and described second magnet, and multiplies each other by the rotation bit difference that will be obtained and fixing yield value and to obtain absolute steering angle.
21, deflection angle sensing device as claimed in claim 20, wherein, when the difference between the described rotation bit value≤0, described deflection angle calculating section is added to the bit number of one-period on the rotation bit value of described magnet with shorter rotation period, perhaps is added on the rotation bit difference that is obtained.
22, a kind of deflection angle method for sensing comprises:
Rotation is coupled to the shaft gear of steering shaft;
Rotate a plurality of secondary gears with described shaft gear, described a plurality of secondary gears have different transmitting ratio mutually;
The corresponding bit value that respectively rotates of changes of magnetic field of output and a plurality of magnet, wherein said a plurality of magnet coupling respectively are associated on the axle of each secondary gears; And
The difference of the rotation bit value by utilizing described a plurality of magnet obtains the deflection angle of steering shaft.
23, deflection angle method for sensing as claimed in claim 22, wherein, by deducting the difference that the rotation bit value that has the magnet of longer cycle in described a plurality of magnet obtains described rotation bit value by the rotation bit value that has more short-period magnet in described a plurality of magnet.
24, deflection angle method for sensing as claimed in claim 22, wherein, the step of described acquisition deflection angle comprises:
When the difference of described rotation bit value more than or equal to 0 the time, multiply by yield value by difference and obtain absolute steering angle described rotation bit value, and
When the difference of described rotation bit value less than 0 the time, be added to the rotation bit value that has more short-period magnet in described a plurality of magnet by bit number and obtain one and rotate the bit difference one-period.
25, deflection angle method for sensing as claimed in claim 22, wherein, the step of described acquisition deflection angle comprises:
When the difference of described rotation bit value more than or equal to 0 the time, multiply by yield value by difference and obtain absolute steering angle described rotation bit value, and
When the difference of described rotation bit value less than 0 the time, be added to the difference of described rotation bit value by bit number, and with resulting and multiply by yield value, to obtain absolute steering angle with one-period.
Applications Claiming Priority (13)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20060069564 | 2006-07-25 | ||
| KR10-2006-0069564 | 2006-07-25 | ||
| KR1020060069564 | 2006-07-25 | ||
| KR10-2006-0101333 | 2006-10-18 | ||
| KR1020060101333A KR100845242B1 (en) | 2006-10-18 | 2006-10-18 | Apparatus and method for sensing steering angle, and manifold sense for steering using the same |
| KR1020060101333 | 2006-10-18 | ||
| KR1020060101871 | 2006-10-19 | ||
| KR1020060101871A KR100757373B1 (en) | 2006-10-19 | 2006-10-19 | Apparatus for sensing steering angle |
| KR10-2006-0101871 | 2006-10-19 | ||
| KR10-2007-0067496 | 2007-07-05 | ||
| KR1020070067496 | 2007-07-05 | ||
| KR1020070067496A KR101272699B1 (en) | 2006-07-25 | 2007-07-05 | Apparatus for sensing steering angle and sensing method of the same |
| PCT/KR2007/003414 WO2008013372A1 (en) | 2006-07-25 | 2007-07-13 | Steering angle sensing apparatus and method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101331049A true CN101331049A (en) | 2008-12-24 |
| CN101331049B CN101331049B (en) | 2012-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800007136A Active CN101331049B (en) | 2006-07-25 | 2007-07-13 | Steering angle sensing apparatus and method thereof |
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| Country | Link |
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| KR (1) | KR101272699B1 (en) |
| CN (1) | CN101331049B (en) |
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| KR100539027B1 (en) * | 2002-10-18 | 2005-12-26 | 현대모비스 주식회사 | detection apparatus for steering angle in vehicle |
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Also Published As
| Publication number | Publication date |
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| KR20080010275A (en) | 2008-01-30 |
| KR101272699B1 (en) | 2013-06-10 |
| CN101331049B (en) | 2012-12-12 |
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