EP3047239A1 - Sensor for emitting an electrical signal based on a path to be detected - Google Patents
Sensor for emitting an electrical signal based on a path to be detectedInfo
- Publication number
- EP3047239A1 EP3047239A1 EP14808824.8A EP14808824A EP3047239A1 EP 3047239 A1 EP3047239 A1 EP 3047239A1 EP 14808824 A EP14808824 A EP 14808824A EP 3047239 A1 EP3047239 A1 EP 3047239A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- field
- sensor
- shaft
- rotation
- angle
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
Links
- 238000011156 evaluation Methods 0.000 claims abstract description 32
- 230000001419 dependent effect Effects 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000000053 physical method Methods 0.000 abstract description 3
- 238000011161 development Methods 0.000 description 7
- 230000018109 developmental process Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229910001047 Hard ferrite Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000006249 magnetic particle Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Classifications
-
- 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
Definitions
- a sensor for outputting an electrical signal based on a path to be detected
- the invention relates to a sensor for outputting an electrical signal based on a path to be detected, in particular an angle and a method for producing a sensor, in particular of the angle sensor.
- WO 2006/029 946 A1 discloses a sensor with a field transmitter element in the form of a transmitter magnet and an evaluation circuit for detecting a magnetic field emitted by the transmitter magnet.
- the transmitter magnet can be moved over a path to be detected, such as a rotation angle, wherein the evaluation circuit detects the rotation angle based on the magnetic field emitted by the encoder magnet and outputs in an output signal.
- the sensor is therefore also called an angle sensor.
- a sensor for outputting an output signal dependent on a rotation angle comprises a shaft rotatable about the rotation angle, a rim encoder element rotationally fixed to one axial end of the shaft for outputting a physical measurement field and an evaluation circuit arranged at an air gap at a distance from the field sensor element for generating the output signal based on the physical measuring field, wherein the rim encoder element is designed such that the air gap is variable in dependence on the rotation angle.
- the specified sensor is based on the consideration that the field-sensor element could be formed in a circle around an axis of rotation of the shaft. In this way, in each rotation angle of the shaft, a part of the field-generating element and thus of the
- CONFIRMATION COPY physical measuring field are directed to the evaluation circuit, so that the rotation angle of the shaft would be detectable in principle over a complete rotation of the shaft.
- the physical measuring field of a single range is sufficient
- Feldpols which is emitted by the field element, not so that the evaluation circuit can detect the rotation angle of the shaft based on the physical field of view, because the physical field of view would have to change depending on the angle of rotation.
- a dipole such as a magnet could be used as a field sensor element, in which the physical measuring field is composed of a superposition of two sub-fields, which are delivered from one field pole.
- a field pole with its subfield dominates the physical measuring field so strongly that the other subfield no longer has any influence on the physical measuring field.
- the physical measuring field can therefore continue to change in these rotation angle ranges depending on the angle of rotation, so that no clear detection of the rotation angle is possible.
- a variable air gap between the field generator element and the evaluation circuit is used as a function of the angle of rotation within the scope of the specified sensor.
- the evaluation circuit can generate an output signal which is dependent on the angle of rotation independently of whether or not the physical measuring field changes as a function of the angle of rotation.
- variable air gap is defined as a function of the angle of rotation as the shortest distance between the field sensor element and the evaluation circuit.
- the specified sensor includes the Field sensor element in the circumferential direction to the angle of rotation considered two, for example, the aforementioned field poles, wherein the variable air gap is the lowest, when one of the two field poles lies on a line through a rotation axis of the shaft and the evaluation circuit.
- the largest signal jumps can be achieved in the evaluation signal depending on the rotation angle, so that the rotation angle can be detected with a maximum sensitivity.
- variable air gap can be arbitrarily formed, for example, by an axially helical field transmitter element.
- the variable air gap is formed by the use of at least one radially and / or axially protruding from the field sensor element projection.
- the variable air gap should be realized by geometrical measures on the field-emitting element and / or on the evaluation circuit, which is technically feasible in terms of cost and time.
- variable air gap is formed by at least two projections projecting radially and / or axially from the field generator element, which are arranged point-symmetrically with respect to each other. In this way, a symmetrical output signal can be output via the rotation angle, which is particularly easy to evaluate in terms of computation.
- the projection in the direction of the angle of rotation is substantially equal to a detection range of the evaluation circuit in the direction of the angle of rotation. In this way, the occurrence of a constant output signal over a range of values of the rotation angle can be avoided even better.
- the field-transmitting element is elliptical in the axial and / or radial direction as viewed from the shaft for the evaluation circuit.
- the elliptical field generator element forms an output signal as a function of the angle of rotation, which approximates a sinusoidal shape and is largely free of harmonics. From such a sinusoidal signal, the rotation angle can be derived in a technically particularly simple manner.
- the physical measuring field can be designed as desired.
- the physical measuring field is a magnetic field.
- the field-emitting element is therefore a magnet which can be used as a permanent magnet without electrical power supply in the sensor.
- the field-emitting element is arranged axially spaced from the shaft and radially spaced from a rotational axis of the shaft, which can be represented on a particularly small space.
- a method for producing a sensor configured for outputting an output signal dependent on a rotational angle comprises the steps of providing a shaft rotatable about the rotational angle injection molding of a device arranged to output a physical measuring field
- Field encoder element to an axial end of the shaft, and arranging an evaluation circuit viewed from the shaft axially in front of the field generator element, which is adapted based on the physical measuring field to produce the output signal.
- the specified method comprises the step of forming an anti-twist device at the axial end prior to injection of the field-transmitting element.
- a material of the field sensor element sprayed onto the shaft comprises a filler in which magnetic particles are accommodated.
- the senor is for output an output dependent on a rotation angle output signal one of the specified methods.
- FIG. 1 is a schematic view of a vehicle with a chassis control system
- FIG. 2 shows a sensor for detecting an acceleration between a wheel and a chassis in the vehicle of FIG. 1, FIG.
- FIG. 3 is a perspective view of part of the sensor of FIG. 2;
- FIG. Fig. 4 in a partial sectional view of a part of a shaft into which a field sensor element for the sensor of FIG. 2 is injectable, and
- Fig. 5 in a partial sectional view of the part of the shaft of Fig. 4, to which the field-emitting element is molded for the sensor of Fig. 2, show.
- Fig. 1 shows a schematic view of a vehicle 2 with a chassis control system 4.
- the suspension control system in a manner known for example from DE 10 2005 060 173 AI a control device 14, which receives in the present embodiment arranged on each wheel 8 angle sensors 16 rotation angle 18, which is a relative position of the corresponding wheel 8 against describe the chassis 6.
- the angles of rotation 18 are transmitted in non-referenced output signals between the angle sensors 16 and the control device 14. Based on the differences of these angles of rotation 18, the control device 14 determines whether the chassis 6 moves in the vertical axis 10, that is, performs a lifting movement, or whether the chassis 6 wobbles or nods and controls.
- control device 14 calculates one of these lifting, rolling and / or pitching counteracting counter-movement and controls with appropriate control signals 20 arranged on the wheels 8 active struts 22 to compensate with the chassis 6, this counter-movement.
- active struts 22 for example, known from DE 101 22 542 B4 struts can be used.
- a suitable nominal value 24 can be supplied to the control device.
- FIG. 2 an example of an angle sensor 16 of FIG. 1 is shown.
- the angle sensor 16 has a circuit housing 26 that can be connected in a stationary manner to the chassis 6 in the vertical axis 10.
- a circuit housing 26 that can be connected in a stationary manner to the chassis 6 in the vertical axis 10.
- not further visible mounting holes 27 are formed on the circuit housing 26 through which a not further shown fastening means, such as a screw can be performed.
- an evaluation circuit 28 housed in the form of a to be described from a donor element in the form of a Magnet 30 receives a physical field in the form of a magnetic field 32. The magnet 30 is rejected by the evaluation circuit 28 with an air gap 31, which is dependent on the rotation angle 18 in the present embodiment. This will be discussed later.
- the moving magnetic field 32 thus changes in dependence of the rotation angle 18 relative to the evaluation circuit 28 in its magnetic field strength, which detects the evaluation circuit 28 metrologically, for example via a known per se Hall element in the evaluation circuit 28 and at an output interface 46 in an angle of rotation 18 carrying not further shown output signal in the manner shown in Fig. 1 to the control device 14 can be transmitted.
- the angle sensor 16 will be explained below with reference to FIG. 3 in more detail.
- the magnet 30 in the present embodiment is elliptical.
- the magnet 30 is constructed elliptical in the axis of rotation 37 of the encoder shaft 38 seen both in an axial cross section and in a radial cross section.
- magnet 30 it would also be possible to magnet 30 but only in a radial or axial cross-section form elliptical.
- the field poles which include a north pole 50 and a south pole 52 in the magnet 30, are separated in the present embodiment by the minor axes of the elliptical cross sections, so that the field poles 50, 52 in the present embodiment in the main vertex points 54 of the elliptically shaped magnet 30th lie.
- the field poles could also be separated by the major axes of the elliptical cross sections.
- the axis of rotation 37 of the encoder shaft 38 from the magnet 30 jump out. Accordingly, two projections 58 are formed by the elliptical formation of the magnet 30 in a radial cross section, which project in the axial direction of the axis of rotation 37 from the magnet 30 from. Due to the elliptical design of the magnet 30, the field poles 50, 52 are formed point-symmetrical to a point of symmetry 59 on the axis of rotation 37.
- variable air gap 31 By the projections 56, 58 of the air gap 31 is formed variable in dependence of the rotation angle 18. This means that the shortest distance between the magnet 30 and the evaluation circuit 28 varies as a function of the angle of rotation 18.
- the variable air gap 31 causes the magnetic field strength of the magnetic field 32 of the magnet 30 to be changed not only by the movement of the magnet 30 itself but also by this varying air gap 31 as a function of the angle of rotation 18.
- the rotation angle 18 in the output signal output from the evaluation circuit 28 can be generated not only based on the movement of the magnet 30 itself but also based on the variation of the air gap 31.
- the protruding projection 58 in the axial direction should fit in the circumferential direction of the rotation axis 37 and thus in the direction of the rotation angle 18 as accurately as possible in a detection range 60 of the evaluation circuit 28, in which the Magnetic field 32 of the magnet 30 is detected. In this way it is ensured that the variable air gap 31 changes in each position based on a change in the rotation angle 18 and leads to a change in the output signal from the evaluation circuit 28.
- the magnet 30 may be molded onto the axial end 39 of the encoder shaft 38. 4, in which the encoder shaft 38 is shown in a state before the magnet 30 is molded onto the encoder shaft 38.
- an elliptical and keptholtes retaining element 62 is formed in the present embodiment in which two walls 64 are added, which are to serve as rotation for the magnet 30.
- a magnetic material is injected.
- a magnetic material for example, as a filler, a plastic such as polyamide,
- Polyphenylene sulfide or the like can be used.
- a magnet powder for example based on hard ferrite or NdFeB-based, may be embedded in this plastic.
- the magnetization of the injected material can be done directly during the injection or after the injection process is completed.
- a magnet prepared beforehand for example, by sintering may be fastened, for example by gluing.
- FIG. 5 an example of a molded magnet 30 is shown, in which the magnet 30 has an axially directed projection 58.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201310218734 DE102013218734A1 (en) | 2013-09-18 | 2013-09-18 | A sensor for outputting an electrical signal based on a path to be detected |
PCT/EP2014/002532 WO2015039754A1 (en) | 2013-09-18 | 2014-09-18 | Sensor for emitting an electrical signal based on a path to be detected |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3047239A1 true EP3047239A1 (en) | 2016-07-27 |
Family
ID=52013987
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14808824.8A Ceased EP3047239A1 (en) | 2013-09-18 | 2014-09-18 | Sensor for emitting an electrical signal based on a path to be detected |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3047239A1 (en) |
CN (1) | CN105556252A (en) |
DE (1) | DE102013218734A1 (en) |
WO (1) | WO2015039754A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016120638B4 (en) * | 2016-10-28 | 2018-10-18 | Preh Gmbh | Input device with actuating part and magnetic measuring field for determining a position parameter of the actuating part |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4612503A (en) * | 1980-10-21 | 1986-09-16 | Kabushiki Kaisha S G | Rotation speed detection device having a rotation angle detector of inductive type |
DE10122542C5 (en) | 2000-07-26 | 2017-01-12 | Continental Teves Ag & Co. Ohg | Device for controlling movements of the construction of motor vehicles and spring strut for motor vehicles |
EP1260787A1 (en) * | 2001-05-21 | 2002-11-27 | ruf electronics gmbh | Angle sensor with magnetoresistive sensing elements |
JP3938501B2 (en) * | 2001-10-16 | 2007-06-27 | 三菱電機株式会社 | Rotation angle detection device, permanent magnet type rotating electrical machine using the same, and electric power steering device using permanent magnet type rotating electrical machine |
JP4391065B2 (en) * | 2002-08-23 | 2009-12-24 | 愛三工業株式会社 | Throttle opening detection device |
US20050194967A1 (en) * | 2004-03-03 | 2005-09-08 | Arquimedes Godoy | Apparatus for sensing angular positions of an object |
WO2006029946A1 (en) | 2004-09-16 | 2006-03-23 | Siemens Aktiengesellschaft | Control device for a motor vehicle gearbox |
DE102005060173A1 (en) | 2004-12-15 | 2006-07-13 | Continental Teves Ag & Co. Ohg | Sensor system for detecting movement in a motor vehicle's structure has a vertical acceleration sensor and two angular acceleration sensors |
DE102005021300B4 (en) * | 2005-05-09 | 2007-08-16 | Vs Sensorik Gmbh | encoders |
JP4068653B2 (en) * | 2006-05-31 | 2008-03-26 | 山洋電気株式会社 | Rotor for motor |
CN201517919U (en) * | 2009-07-08 | 2010-06-30 | 南京奥联汽车电子电器有限公司 | Rotation angle measuring mechanism with Hall integrated circuit |
-
2013
- 2013-09-18 DE DE201310218734 patent/DE102013218734A1/en not_active Withdrawn
-
2014
- 2014-09-18 EP EP14808824.8A patent/EP3047239A1/en not_active Ceased
- 2014-09-18 WO PCT/EP2014/002532 patent/WO2015039754A1/en active Application Filing
- 2014-09-18 CN CN201480051359.XA patent/CN105556252A/en active Pending
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2015039754A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2015039754A1 (en) | 2015-03-26 |
DE102013218734A1 (en) | 2015-03-19 |
CN105556252A (en) | 2016-05-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3075061B1 (en) | Sensor arrangement and use of the sensor arrangement in a motor vehicle control device | |
EP3309557B1 (en) | Method for manufacturing an angle sensor | |
DE112011101375B4 (en) | Magnet and holder assembly with improved rotational and axial stability | |
DE102017109972A1 (en) | Non-rotating mounting of a wheel speed sensor using a differential magnetoresistive sensor | |
EP2864797B1 (en) | Brake system, vehicle therewith and braking method | |
EP2943798B1 (en) | Sensor device for speed measurement on a wheel of a vehicle, brake system for a vehicle and vehicle therewith, and use of the sensor device for speed measurement on a wheel of a vehicle | |
DE102017222677A1 (en) | sensor device | |
DE102017212903A1 (en) | Method and device for monitoring the movement of a wheel of a bicycle | |
EP2888559A1 (en) | Sensor arrangement for detecting angles of rotation on a rotated component | |
DE102019112429A1 (en) | Sensor device and method for current modulation switching using a two-wire current interface | |
WO2020104593A2 (en) | Angle sensor having a multi-pole magnet for a motor vehicle steering system | |
WO2019122384A2 (en) | Rotational speed sensor with enhanced resolution and multiple switching thresholds | |
DE10360613B4 (en) | Process for producing a magnetic multipole encoder | |
WO2015039754A1 (en) | Sensor for emitting an electrical signal based on a path to be detected | |
DE102018217278A1 (en) | Wheel hub assembly with dual angular position sensors | |
DE102011111846A1 (en) | Device for determining rotational torque and steering angle of steering system in motor car during steering maneuvers, has sensors for detecting part of magnetic field and overlapping of two magnetic fields to determine torque and angle | |
DE102018217283A1 (en) | Angle sensor | |
EP3591362A1 (en) | Method for measurement of a torque of a drive unit | |
WO2018095899A1 (en) | Measuring device for measuring an articulation angle and vehicle combination | |
DE102014207761A1 (en) | Torque detection with differential angle sensor in bottom bracket | |
EP1773647A1 (en) | Device and method for determining the steering wheel angle | |
WO2010003801A1 (en) | System for detecting a rotating magnetic field | |
EP3884506B1 (en) | Permanent magnet encoder for a sensor apparatus, sensor apparatus and control device for controlling a vehicle | |
DE102017222020A1 (en) | Sensor arrangement for determining at least one rotational property of an element rotating about at least one axis of rotation | |
WO2018224335A1 (en) | Device and method for reporting a change in the position of a signalling wheel |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20160418 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20170802 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R003 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
18R | Application refused |
Effective date: 20180120 |