CN106996738A - Angular sensor - Google Patents
Angular sensor Download PDFInfo
- Publication number
- CN106996738A CN106996738A CN201611271986.1A CN201611271986A CN106996738A CN 106996738 A CN106996738 A CN 106996738A CN 201611271986 A CN201611271986 A CN 201611271986A CN 106996738 A CN106996738 A CN 106996738A
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- China
- Prior art keywords
- rotor
- stator
- coil
- receiving coil
- transmitting coil
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Classifications
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
- H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
-
- 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
- G01D5/20—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 by varying inductance, e.g. by a movable armature
- G01D5/204—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 by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils
- G01D5/2053—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 by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils by a movable non-ferromagnetic conductive element
-
- 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
- G01D5/20—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 by varying inductance, e.g. by a movable armature
- G01D5/204—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 by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils
- G01D5/2066—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 by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils by movement of a single coil with respect to a single other coil
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Angular sensor includes the stator component with stator transmitting coil and at least one stator receiving coil；It is can rotationally being supported relative to stator component, with the rotor receiving coil being electrically connected to each other and the rotor elements of rotor transmitting coil；Wherein, the rotor receiving coil is inductively coupled with stator transmitting coil, so that the electromagnetic field produced by the stator transmitting coil induced-current in the rotor receiving coil, the electric current flows through the rotor transmitting coil so that the rotor transmitting coil produces an other electromagnetic field；At least one described stator receiving coil is inductively coupled with the rotor transmitting coil, so that the anglec of rotation inductively between the stator component and the rotor elements is relevant, and the electromagnetic field produced by the rotor transmitting coil senses at least one alternating voltage relevant with angle at least one described stator receiving coil.The rotor transmitting coil and at least one described stator receiving coil have oppositely extending winding respectively.
Description
Technical field
The present invention relates to a kind of angular sensor, axle and one for example can determine by the angular sensor
The anglec of rotation between other component.
Background technology
In order to measure the anglec of rotation, such as known angular sensor, wherein, rotate magnet and pass through corresponding magnetic field
Sensor.Measurement to magnetic vector then allows to derive the anglec of rotation.Such sensor is also reacted to external magnetic field,
The external magnetic field can for example be caused by the electric current for the electric current cable being adjacently positioned and be very sensitive to disturbing.
Another angular sensor utilizes eddy current effects.Here, for example making metal target motion pass through sensor
Coil, the cell winding is supplied with alternating voltage and the inducing eddy-current in the target.This causes cell winding
Induction coefficient reduces and allows to derive the anglec of rotation by frequency shift.For example, part of the coil for concussion loop,
The resonant frequency in the concussion loop is moved when induction coefficient changes.However, this angular sensor can be relative to
Location tolerance (the mainly inclination of target) has high horizontal sensitivity.The frequency produced by external electromagnetic field can also be done
(lock phase, Injection Locking) is disturbed, because generally being worked with the frequency in tens of MHz ranges.
By the B1 of document US 7 191 759 B2, US 7 276 897 B2, EP 0 909 955 B1, US 6 236 199
The angular sensor of the coil based on coupling is it is known that with the B1 of EP 0 182 085.In those references, in excitation coil
Middle structure alternating electromagnetic field, the alternating electromagnetic field is coupled in multiple receiving coils and is respectively induced a voltage there.
In order to measure the anglec of rotation, using target can rotationally support, can be conductive, the target influences to swash according to its angle position
Encourage between coil and receiving coil inductively.In the B1 of EP 0 909 955 and the B1 of US 6 236 199, short-circuit is flat
Face conductor loop is located in target, the alternating electromagnetic field reciprocation of the conductor loop and excitation coil.
The content of the invention
Embodiments of the present invention can be realized in an advantageous manner, determine axle and one in addition with method in this way
Component between the anglec of rotation so that external disturbance and/or component tolerance only produce small influence to measurement.
The present invention relates to a kind of angular sensor, the angular sensor is enabled in particular to high electromagnetism
Used in the surrounding environment of interference field.Angular sensor for example can be in the engine room of vehicle or engine room is attached
Closely use, such as determining throttle valve position, the rotor-position of BLDC- motors, drive pedal position or camshaft location.
Angular sensor cost advantages described below are, it is necessary to small installing space, and based on simple measuring principle.
According to the embodiment of the present invention, angular sensor includes having stator transmitting coil and at least one stator
The stator component of receiving coil；It is can rotationally being supported relative to stator component, with the rotor receiving coil being electrically connected to each other
With the rotor elements of rotor transmitting coil；Wherein, the rotor receiving coil is inductively coupled with stator transmitting coil,
So that the electromagnetic field produced by stator transmitting coil induced-current in rotor receiving coil, the electric current flows through rotor emission lines
Circle so that rotor transmitting coil produces an other electromagnetic field；And wherein, at least one stator receiving coil is launched with rotor
Coil is inductively coupled, so that the anglec of rotation inductively between stator component and rotor elements is relevant, and
The electromagnetic field produced by rotor transmitting coil senses at least one friendship relevant with angle at least one stator receiving coil
Time variant voltage.
Control unit (described control unit can be for example disposed on stator component) can be supplied to stator transmitting coil
With alternating current so that stator transmitting coil produces electromagnetic field, the electromagnetic field produces alternating current again in rotor receiving coil.
Energy is passed into rotor elements from stator component via electromagnetic field in this way.Then sense in rotor receiving coil
Electric current be used to be powered to rotor transmitting coil, and such as its mode is directly to connect rotor transmitting coil with rotor receiving coil
Connect, and the electric current of rotor receiving coil also directly flows through rotor transmitting coil.Then rotor transmitting coil produces one (in addition
) electromagnetic field, the electromagnetic field produces alternating current at least one stator receiving coil.Stator component can also carry multiple
Stator receiving coil.
Between rotor transmitting coil and one or more stator receiving coil inductively with rotor elements and stator
The anglec of rotation between element is relevant.This can be for example different size of overlapping (along the direction of observation of pivot center) by coil
And/or realized by different degrees of overlapping of coil windings (Windungen).In one or more stator receiving coil
The alternating current of sensing can have differently high with supply alternating current in stator transmitting coil according to the anglec of rotation
Amplitude and/or different phases.For example by measuring or asking for the phase and/or amplitude, control unit can determine rotation
Angle.
The stator component that control unit (such as IC) can also be carried can be in geometrical aspects for example relative to an axle
End arrangement, stator component is fixed on the end.Stator component can be including for example with stator transmitting coil and extremely
The stator circuit plate of a few stator receiving coil.Rotor elements can carry target to be had rotor receiving coil and turns in other words
The rotor circuit plate of sub- transmitting coil, the target in other words with axle take with motion by the rotor circuit plate.
Additionally, rotor transmitting coil has oppositely extending winding.At least one stator receiving coil also has reverse
The winding of extension, these oppositely extending windings are embodied as the electromagnetic field for producing opposite orientation.
Herein it will be appreciated that a coil can have the conductor built by multiple conductor loops.One conductor loop can
To be respectively by a section of the face rotated by coil almost completely around conductor once.
One coil (such as rotor transmitting coil and/or stator receiving coil) can also have from the point of view of axial visual angle
(i.e. with along the view directions of the pivot center of rotor elements) nonoverlapping multiple windings.
Here, a winding can include a conductor loop or multiple conductor loops for coil, all conductor loops are surround
The identical face rotated by coil.Winding can extend in the plane for being substantially normal to the extension of rotor elements pivot center.
Two different windings of one coil are not overlapped generally.
For each coil (rotor transmitting coil and/or stator receiving coil), rotated by the winding of an orientation
Face can be equal to the face rotated by the winding of an other orientation.
The winding oriented oppositely extendingly causes the substantially uniform external field in coil substantially will not induced-current.
This aspect is applied to the field produced by stator transmitting coil, is also applied for the outside that can be for example produced by neighbouring electric lead
Interference field.
The winding of rotor transmitting coil and stator receiving coil (multiple stator receiving coils) can also be according to the anglec of rotation
And it is overlapping to some extent.In this way, coil is coupled to some extent under the different anglecs of rotation, thus, it is possible to
The anglec of rotation is exported by the electric current sensed in one or more stator receiving coil.
According to the embodiment of the present invention, rotor elements have frequency converter, and the frequency converter turns on rotor receiving coil
Between rotor transmitting coil and it is embodied as other for the alternating current in rotor receiving coil to be transformed into one
Frequency, alternating current for rotor transmitting coil.Before sensing alternating current is directed to rotor receiving coil, the friendship
Time-dependent current can be rectified in rotor elements and then by (frequency converter) in inversion to an other frequency.Produced electricity
Magnetic field and the electric current sensed at least one stator receiving coil now have and the friendship for being powered to stator transmitting coil
The different frequency of time-dependent current.On the one hand the interference electric current sensed in rotor receiving coil can be suppressed by rectification.On the other hand
Energy transmission and measurement frequency from stator component to rotor elements is decoupled.
Electronic circuit including frequency converter (such as passive rectifier and controllable inverter) can be received by rotor completely
The electric current of coil is run.In other words, the control device of inverter can also be run by the electric current.
Electronic circuit can also include the part for rotor elements self-inspection, and the part for example can detect on rotor elements
The impedance of two coils, to detect whether it is damaged.
According to the embodiment of the present invention, rotor elements have a capacitor, the capacitor and rotor receiving coil and/or
Rotor transmitting coil formation concussion loop.If shaking loop by the electromagnetic field excitation with its resonant frequency, (LC resonance is returned
Road), then efficient energy transmission is produced, thus produce in rotor receiving coil big electric current and then also in rotor transmitting coil
It is middle to produce big electric current.Thus, high alternating current is also sensed at least one stator receiving coil.For launching to stator
The frequency of the alternating voltage of coil electricity then may be at shaking in the resonant frequency range in loop.
According to the embodiment of the present invention, stator transmitting coil and/or rotor receiving coil enclose in a circle (Windung)
Around a pivot center of rotor elements.Stator transmitting coil and/or rotor receiving coil both of which can be with substantially circular
Transmitting coil, the central point of the transmitting coil may be near pivot center.Two coils may each comprise one or
Multiple conductor loops.Pivot center can be overlapped with the plane center of gravity of two coils.
According to the embodiment of the present invention, stator transmitting coil is entirely around at least one stator receiving coil.Stator connects
The winding of take-up circle (multiple stator receiving coils) and especially described stator receiving coil can be arranged in stator transmitting coil
It is internal.Rotor receiving coil can also entirely around rotor transmitting coil and especially described rotor transmitting coil winding.
According to the embodiment of the present invention, between stator transmitting coil and rotor receiving coil inductively with angle without
Close.Alternatively, or additionally, stator transmitting coil and rotor receiving coil can be in axial direction overlapping.This is for example basic
It is such situation in upper circular, in axial direction overlapping coil.Two coils are in axial direction overlapping at least in part,
Can so it be interpreted as, when in axial direction observing two coils, two coils are overlapping at least in part.This can also be such
It is interpreted as, two coils are overlapping at least in part when in axial direction projecting in the plane for be orthogonal to axial direction.
According to the embodiment of the present invention, at least one stator receiving coil and/or rotor transmitting coil have even number
Winding.If respectively different orientation as much, rotating around the coplanar winding of phase inversion, that for example substantially uniform interference magnetic
Field then will not induced-current.
In a situation, the geometry of stator receiving coil (multiple stator receiving coils) substantially can be equivalent to turning
The geometry of sub- transmitting coil.Stator receiving coil (multiple stator receiving coils) and rotor transmitting coil can have identical
The winding of quantity.But it is also possible that stator receiving coil (multiple stator receiving coils) and rotor transmitting coil have not
With the winding of quantity.
One stator receiving coil can be for example with two windings, and two oppositely extending windings can rotate half
Circular face.
According to the embodiment of the present invention, stator component include two mutual stator receiving coils in 90 ° staggered, three
Be in the 120 ° of stator staggered receiving coils or it is in general N number of be in the stator receiving coil that 360 °/N staggers, its
In, N is the integer more than 1.In the case where each stator receiving coil has two windings, it can realize in this way most
Big angular resolution.
According to the embodiment of the present invention, stator transmitting coil, one or more stator receiving coil, rotor receive line
Circle and/or rotor transmitting coil are planar coil.Here, a planar coil is interpreted as a coil, the winding of the coil
It is substantially all to be in a plane.Planar coil can be for example with it diameter only 1% height.
According to the embodiment of the present invention, stator transmitting coil and/or one or more stator receiving coil are arranged
On the stator circuit plate of stator component and/or in stator circuit plate.Rotor transmitting coil and/or rotor receiving coil can also
It is disposed on the rotor circuit plate of rotor elements and/or in rotor circuit plate.The winding of such as corresponding coil can be whole
On the both sides for being positioned in stator circuit plate.Circuit board have it is multilevel in the case of, winding can also be inside circuit board
Extension.Corresponding circuit board can also carry (i.e. special for the component and/or IC (i.e. integrated circuit) or ASIC of control unit
With integrated circuit), capacitor and/or frequency converter for shaking loop.
According to the embodiment of the present invention, angular sensor also includes control unit, and described control unit is embodied as
For being provided with alternating voltage and for sensing sense at least one stator receiving coil at least one to stator transmitting coil
Individual alternation unsteady flow, and determine by the alternating current anglec of rotation between stator component and rotor elements.Control unit can
The phase and/or amplitude of alternating current in stator receiving coil are measured, and therefrom for example determines alternation electricity in stator receiving coil
Phase shift between stream.Then the anglec of rotation can be calculated by phase shift.
According to the embodiment of the present invention, control unit be embodied as the alternating current by sensing determine stator component and
Axial spacing between rotor elements.Except when outside the preceding anglec of rotation, it can also determine spacing between two elements (for example
By the average value on the time), so to reduce systematic error when determining angle.
Brief description of the drawings
Embodiments of the present invention are illustrated with reference to the accompanying drawings, wherein, accompanying drawing and explanation are not as the limit to the present invention
System.
Fig. 1 schematically shows angular sensor according to the embodiment of the present invention.
Fig. 2A is schematically shown for angular sensor according to the embodiment of the present invention in the first relative position
Stator component and rotor elements in putting.
Fig. 2 B schematically show the stator component and rotor elements in the second relative position in Fig. 2A.
What Fig. 3 schematically showed the rotor elements for angular sensor according to the embodiment of the present invention one replaces
For embodiment.
What Fig. 4 schematically showed the rotor elements for angular sensor according to the embodiment of the present invention one replaces
For embodiment.
What Fig. 5 schematically showed the rotor elements for angular sensor according to the embodiment of the present invention one replaces
For embodiment.
What Fig. 6 schematically showed the rotor elements for angular sensor according to the embodiment of the present invention one replaces
For embodiment.
What Fig. 7 schematically showed the rotor elements for angular sensor according to the embodiment of the present invention one replaces
For embodiment.
What Fig. 8 schematically showed the rotor elements for angular sensor according to the embodiment of the present invention one replaces
For embodiment.
What Fig. 9 schematically showed the stator component for angular sensor according to the embodiment of the present invention one replaces
For embodiment.
Accompanying drawing is only schematical and not according to dimension scale.Identical reference marker represents identical or function phase in accompanying drawing
Same feature.
Embodiment
Fig. 1 shows to include the angular sensor 10 of stator component 12 and rotor elements 14.Rotor elements 14 can be consolidated
Component is scheduled on to provide on the axle 16 such as choke valve, motor, camshaft, drive pedal or by the axle 16.Axle 16 can
Rotated around axis A, and stator component 12 is opposite along corresponding axial direction and rotor elements 14.Such as stator component 12
It is fixed on the housing of component.
Stator component 12 includes stator circuit plate 18, stator transmitting coil 20 is disposed with the circuit board and multiple fixed
Sub- receiving coil 22.Stator circuit plate 18 can be the stator circuit plate 18 of multilayer, and the conductor of coil 20,22 may be at
On the both sides of circuit board 18 and between each layer in circuit board 18.Other component for control unit 24 may be at fixed
On sub-circuit board 18.Control unit 24 can be provided with alternating voltage to stator transmitting coil 20 (for example between 1MHz and 20MHz it
Between), and can ask in each stator receiving coil 22 sensing alternating voltage.Control unit 24 can be based on these measurements
Determine the relative rotation angle between stator component 12 and rotor elements 14.
Rotor elements 14 include rotor circuit plate 26.Rotor receiving coil 28 and rotor are disposed with rotor circuit plate 26
Transmitting coil 30.Rotor circuit plate 26 can be the circuit board of multilayer, and the conductor of coil 28,30 may be at rotor circuit
On the both sides of plate 26 and between each layer in rotor circuit plate 26.Other component may be on rotor circuit plate 26, such as
With reference to as Figure 4 and 5 further explaination.
Fig. 2A shows the stator component 12 being mutually arranged in first angle position and rotor elements 14.The He of stator component 12
Rotor elements 14 may be mounted in the angular sensor 10 in Fig. 1, for illustration purposes, in fig. 2 by its that
This upset, so as to illustrate two elements 12,14 to overlook.The axis of two elements 12,14 generally should be identical.
Stator transmitting coil 20 is substantially circular, and entirely around stator receiving coil 22a, 22b, wherein, axis A
It is the central point of stator transmitting coil 20.First and second stator receiving coil 22a, 22b are mutually in 90 ° to be staggered, and respectively
With two oppositely extending winding 32a, 32b (only in coil 22a be provided with reference marker).It is every in winding 32a, 32b
Individual winding is semicircle.Winding 32a is oriented oppositely extendingly relative to winding 32b (reference current).Two windings 32a, 32b around
Turn identical face.Stator receiving coil 22a, 22b can have identical geometry.
Rotor receiving coil 28 is also substantially circle, and entirely around rotor transmitting coil 30, wherein, axis A is
The central point of stator transmitting coil 20.The end by them of rotor receiving coil 28 and rotor transmitting coil 30 is mutually electrically connected
Connect.Rotor receiving coil 28 can rotate identical face as stator transmitting coil 20, and/or launch with the stator
Coil is aligned relative to pivot center A.The geometry of stator transmitting coil 20 and rotor receiving coil 28 can be identical.
It is respectively semicircular oppositely extending winding 34a, 34b that rotor transmitting coil 30, which has two,.First winding 34a
Orient oppositely extendingly relative to the second winding 34b (reference current).Two windings 32a, 32b rotate identical face.Stator
The geometry of receiving coil 22a, 22b and rotor transmitting coil 30 can also be identical.Particularly stator receiving coil
22a, 22b winding 32a, 32b can equally be built such as the winding 34a of rotor transmitting coil 30,34b.
When control unit 24 loads stator transmitting coil 20 with alternating voltage, alternating electromagnetic field, the alternating electromagnetism are produced
Field can be received by rotor receiving coil 28 and sense a voltage there, and the voltage produces electric current.Therefore, can for example such as
Spacing between this selection stator circuit plate 18 and rotor circuit plate 26 so that stator circuit plate 18 is in rotor circuit plate 26
In neighbouring field.
The electromagnetic field of stator transmitting coil 20 is in stator receiving coil 22a, 322b and rotor transmitting coil 30 due to anti-
To extension winding 32a, 32b in other words 34a, 34b and be substantially unable to induced-current.Sense in rotor receiving coil 28
Electric current also flows through rotor transmitting coil 30, thus, and the rotor transmitting coil produces two opposite orientations by its winding 34a, 34b
Alternating electromagnetic field.
These alternating fields sense alternating current in stator receiving coil 22a, 22b, and the alternating current is for each rotor
It is relevant relative to the relative rotation angle of rotor elements 14 with stator component 12 for receiving coil 22a, 22b.If stator connects
Take-up circle 22a, 22b have with the identical geometry of rotor transmitting coil 30, and/or if stator receiving coil 22a,
22b right-hand rotation and left-hand rotation winding 32a, 32b quantity are identical with the right-hand rotation of rotor transmitting coil 30 and left-hand rotation winding 34a, 34b,
Then result in strong signal.
In fig. 2, stator component 12 and rotor elements 14 are oriented so as to so that rotor transmitting coil 30 is in the first stator
Maximum alternating current is sensed in receiving coil 22a, and is not sensed or hardly sensing friendship in the second stator receiving coil 22b
Time-dependent current.The reason is that stator receiving coil 22a winding 32a, 32b and the winding 34a, 34b point of rotor transmitting coil 30
It is farthest not overlapping, and in coil 30,22b winding only half is overlapping respectively and induced-current cancels each other out.
Situation is on the contrary, stator component 12 and rotor elements 14 are oriented so as in fig. 2b so that rotor transmitting coil 30 exists
Maximum alternating current is sensed in second stator receiving coil 22b, and is not sensed in the first stator receiving coil 22a or almost
Do not sense alternating current.
Fig. 3 shows an other feasible design of rotor elements 14.Here, rotor receiving coil 28 has multiple conductors
Ring, these conductor loops all can extend in one plane.Rotor receiving coil 28 can have spiral design.
Fig. 4 shows an other embodiment of rotor elements 14, wherein, frequency converter 36 turns on rotor receiving coil 28
Between rotor transmitting coil 30.
Frequency converter 36 can be provided by an electronic circuit, an IC of the electronic circuit for example on rotor circuit plate 26
It is middle to exist.Frequency converter 36 can include rectifier and inverter, and the rectifier and inverter are (first to the alternating current of sensing
First) carry out rectification, (then) by its inversion to an other frequency, such as double frequency or half frequency.Thus, effectively
Ground suppresses that the interference signal of input may be coupled.By selecting an other frequency, moreover it is possible to which being read by frequency selecting type will
It is input in stator receiving coil 22a, 22b to couple to be input to from rotor transmitting coil 30 from the coupling of stator transmitting coil 20 and determines
Distinguished in sub- receiving coil 22a, 22b.
Electronic circuit on rotor elements 14 in other words on rotor circuit plate 26 can also pass through additional electronic unit quilt
Self-inspection for rotor elements 14.For example when the conductor circuit on rotor elements 14 is interrupted, this for example can be surveyed by impedance
Measure to recognize.
Fig. 5 shows an other embodiment of rotor elements 14, wherein, capacitor 38 is linked into rotor transmitting coil
In 30.Capacitor 38 can also be disposed on rotor circuit plate 26 as component, such as chip capacitor.Capacitor 38
It can be connected with two coils (rotor receiving coil 28 and rotor transmitting coil 30), and can be with these coils formation resonance
Loop is shaken in other words in loop.Resonant frequency can be for instance in several MHz ranges.
In order to obtain big measurement signal, the size of capacitor 38 can be so determined so that the resonance frequency in concussion loop
Rate equivalent to driving frequency, that is, in stator transmitting coil 20 alternating current frequency (such as 13.56MHz), and thus
Also correspond to the frequency of alternating current in coil (rotor receiving coil 28 and rotor transmitting coil 30).In order that frequency movement is arrived
In correct scope, the conductor loop of (this for example improves induction coefficient in quadratic power form) rotor receiving coil 28 can also be matched
Quantity (such as shown in Figure 3).
Fig. 6,7,8 are shown similar to Fig. 3,4,5 rotor elements 14, wherein, rotor transmitting coil 30 has four windings
34a, 34b, wherein, two winding 34a are oriented in the first direction respectively and two winding 34b are oriented along opposite second direction.
The electric current synthesized in other words is oriented accordingly in Fig. 6,7,8 with arrow to show.In general, rotor transmitting coil 30 can have
There are even number winding 34a, 34b and identical quantity oppositely extending winding 34a, 34b.Oppositely extending winding 34a, 34b enclose
Around pivot center A, circumferentially direction is alternately arranged.
Stator receiving coil 22a, 22b can also have even number winding 32a, 32b to prolong with the reverse of identical quantity respectively
The winding 32a, 32b stretched.Oppositely extending winding 32a, 32b can also circumferentially direction be alternately arranged around pivot center A.
Such as stator receiving coil 22a, 22b can have to be designed with the identical of rotor transmitting coil 30.
Fig. 7 shows an other embodiment of rotor elements 14, and the rotor elements, which are similar to Fig. 6, to be had for rotor hair
Four windings 34a, 34b of ray circle 30, and wherein, similar to Fig. 4, frequency converter 36 turns on rotor receiving coil 28 and turned
Between sub- transmitting coil 30.
Fig. 8 shows an other embodiment of rotor elements 14, and the rotor elements, which are similar to Fig. 6, to be had for rotor hair
Four windings 34a, 34b of ray circle 30, and wherein, similar to Fig. 5, capacitor 38 is linked into rotor transmitting coil 30
In.
Fig. 9 shows an embodiment of stator component 12, the stator component have be in 120 ° stagger first determine
Sub- receiving coil 22a, the second stator receiving coil 22b and the 3rd stator receiving coil 22c (and these coils can respectively such as
The stator receiving coil 22a mutually in 90 ° staggered in Fig. 2A and 2B, 22b are built like that).
In general, one of stator receiving coil 22a, 22b, 22c winding 32a, 32b quantity N determine stator component
The cycle of 12 angular sensors 10 in other words.Cycle be 360 °/(N/2).Such as stator member shown in Fig. 2A, 2B and 9
Part 12 has 360 ° of cycle.With the rotor transmitting coil 30 in Fig. 6,7 and 8 accordingly and with the stator reception line of four windings
Circle is with 180 ° of cycle.
Cycle determines the angular surveying scope of angular sensor 10, because only in periodic regime, the anglec of rotation with
The voltage sensed in stator receiving coil 22a, 22b, 22c just has the corresponding relation of univocality.Such as determining in Fig. 2A, 2B and 9
Angular sensor 10 is with 360 ° of angular surveying scope in other words for subcomponent 12, because stator receiving coil 22a, 22b,
22c and rotor transmitting coil 30 are inductively univocality in 360 ° of angular surveying scopes.Control unit 24 can be by two
Individual, three or N number of magnitude of voltage measured in stator receiving coil 22a, 22b, 22c determine the anglec of rotation by mathematical operation
Degree.
In the case of two magnitudes of voltage, this can after optional migration by the ARCTAN of amplitude calculate into
OK.It can be become by three magnitudes of voltage by Clarke and bring calculating two-phase (no skew) signal, counted followed by ARCTAN
Calculation determines the anglec of rotation by the signal.
It is as independent as possible in order to be produced by multiple stator receiving coil 22a, 22b, 22c under the anglec of rotation determined
Magnitude of voltage, stator receiving coil 22a, 22b, 22c are arranged on stator component 12 with mutually staggering on geometry.Typically
For, in the case of the m phase systems with m stator receiving coil 22a, 22b, 22c, the offset on geometry is fitted
With：Offset=cycle/m (if m ＞=3), or offset=cycle/4 (if m=2).
In Figures 2 A and 2 B, two stator receiving coils 22a, 22b are mutually in 90 °=360 °/4 wrong on geometry
Open.In this way, the alternating voltage of mutually phase shifting in 90 ° is produced in two stator receiving coils 22a, 22b.
In fig .9, three stator receiving coils 22a, 22b, it is wrong on geometry that 22c is in 120 °=360 °/3
Open.In this way, the alternation electricity for being in 120 ° of phase shiftings is produced in three stator receiving coils 22a, 22b, 22c
Pressure.
Finally, it is to be noted, that term such as " having ", " comprising " are not excluded for other element or step, and term
" one " " or " one " are not excluded for multiple.Reference marker in claim is not construed as limitation.
Claims (10)
1. angular sensor (10), it includes：
Stator component (12), the stator component has stator transmitting coil (20) and at least one stator receiving coil (22)；
The rotor elements (14) that can be rotationally supported relative to the stator component (12), the rotor elements, which have, to be mutually electrically connected
The rotor receiving coil (28) and rotor transmitting coil (30) connect；
Wherein, the rotor receiving coil (28) inductively couples with the stator transmitting coil (20) so that pass through
The electromagnetic field that the stator transmitting coil (20) produces induced-current in the rotor receiving coil (28), the electric current flows through
The rotor transmitting coil (30) so that the rotor transmitting coil (30) produces an other electromagnetic field；
Wherein, at least one described stator receiving coil (22) is inductively coupled with the rotor transmitting coil (30),
So as to which the anglec of rotation inductively between the stator component (12) and the rotor elements (14) is relevant, and by described
The electromagnetic field that rotor transmitting coil (30) is produced senses at least one and angle at least one described stator receiving coil (22)
The relevant alternating voltage of degree；
Characterized in that,
The rotor transmitting coil (30) and at least one described stator receiving coil (22) have oppositely extending winding respectively
(32a, 32b, 34a, 34b).
2. the angular sensor (10) according to any one of the preceding claims,
Wherein, the rotor elements (14) have frequency converter (36), and the frequency converter turns on the rotor receiving coil (28)
Between the rotor transmitting coil (30) and be embodied as be used for by come from the rotor receiving coil (28) in alternation electricity
Circulation becomes the alternating current for rotor transmitting coil (30) of an other frequency.
3. the angular sensor (10) according to any one of the preceding claims,
Wherein, the rotor elements have a capacitor (38), the capacitor and the rotor receiving coil (28) and/or described
Rotor transmitting coil (30) constitutes concussion loop.
4. the angular sensor (10) according to any one of the preceding claims,
Wherein, the stator transmitting coil (20) and/or the rotor receiving coil (28) are first around the rotor in a circle
A pivot center (A) for part (14).
5. the angular sensor (10) according to any one of the preceding claims,
Wherein, the stator transmitting coil (20) is entirely around at least one described stator receiving coil (22)；And/or
Wherein, the rotor receiving coil (28) is entirely around the rotor transmitting coil (30).
6. the angular sensor (10) according to any one of the preceding claims,
Wherein, it is inductively unrelated with angle between the stator transmitting coil (20) and the rotor receiving coil (28)；
And/or
Wherein, the stator transmitting coil (20) and the rotor receiving coil (28) are in axial direction overlapping.
7. the angular sensor (10) according to any one of the preceding claims,
Wherein, described at least one stator receiving coil (22) and/or the rotor transmitting coil (30) have even number winding
(32a, 32b, 34a, 34b).
8. the angular sensor (10) according to any one of the preceding claims,
Wherein, the stator component (12) have two mutually it is in 90 ° stagger, three be in 120 ° stagger or it is N number of mutually
The stator receiving coil (22) staggered into 360 °/N, wherein, N is the integer more than 1.
9. the angular sensor (10) according to any one of the preceding claims,
Wherein, the stator transmitting coil (20), at least one described stator receiving coil (22), the rotor receiving coil
And/or the rotor transmitting coil (30) is planar coil (28)；And/or
Wherein, the stator transmitting coil (20) and/or at least one described stator receiving coil (22) are arranged in stator circuit
On plate (18) and/or it is arranged in stator circuit plate (18)；And/or
Wherein, rotor transmitting coil (30) and/or rotor receiving coil (28) are arranged on rotor circuit plate (26) and/or arranged
In rotor circuit plate (26).
10. the angular sensor (10) according to any one of the preceding claims, in addition to：
Control unit (24), described control unit is embodied as being used to be provided with alternating voltage to the stator transmitting coil (20), and
And for sensing at least one alternation unsteady flow of the sensing at least one described stator receiving coil (22), and by the alternation
Electric current determines the anglec of rotation between the stator component (12) and the rotor elements (14)；And/or
Wherein, the alternation unsteady flow that described control unit (24) is embodied as being sensed by least one determines the stator component
(12) the axial spacing between the rotor elements (14).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015220624.6A DE102015220624A1 (en) | 2015-10-22 | 2015-10-22 | Rotation angle sensor |
| DE102015220624.6 | 2015-10-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106996738A true CN106996738A (en) | 2017-08-01 |
| CN106996738B CN106996738B (en) | 2020-11-20 |
Family
ID=58490217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611271986.1A Active CN106996738B (en) | 2015-10-22 | 2016-10-21 | Rotation angle sensor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106996738B (en) |
| DE (1) | DE102015220624A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021036632A1 (en) * | 2019-08-31 | 2021-03-04 | 上海禾赛科技股份有限公司 | Method for measuring deflection angle of galvanometer scanner, and laser radar using method |
| CN112857407A (en) * | 2019-11-27 | 2021-05-28 | 英飞凌科技股份有限公司 | Inductive angle sensor with distance value determination |
| CN114599937A (en) * | 2019-11-29 | 2022-06-07 | 海拉有限双合股份公司 | Linear motion sensor |
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| DE102017210655B4 (en) * | 2017-06-23 | 2023-12-21 | Robert Bosch Gmbh | Rotation angle sensor |
| DE102017211490A1 (en) * | 2017-07-06 | 2019-01-10 | Robert Bosch Gmbh | Angle of rotation sensor assembly, LiDAR system, working device and operating method for a LiDAR system |
| DE102017211491A1 (en) * | 2017-07-06 | 2019-01-10 | Robert Bosch Gmbh | Angle of rotation sensor assembly, LiDAR system, working device and operating method for a LiDar system |
| EP3792599B1 (en) | 2019-09-12 | 2023-05-03 | TE Connectivity Belgium BVBA | Sensor device for measuring the rotational position of an element |
| US11692887B2 (en) * | 2020-06-11 | 2023-07-04 | Kyocera Avx Components (Werne) Gmbh | Torque sensing device and method |
| DE102020214492A1 (en) * | 2020-11-18 | 2022-05-19 | Robert Bosch Gesellschaft mit beschränkter Haftung | Sensor system for determining at least one rotational property of a rotating element |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106996738B (en) | 2020-11-20 |
| DE102015220624A1 (en) | 2017-04-27 |
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