CN102686980B - For detecting the magnetic field sensor device of motor element displacement - Google Patents
For detecting the magnetic field sensor device of motor element displacement Download PDFInfo
- Publication number
- CN102686980B CN102686980B CN201080058122.6A CN201080058122A CN102686980B CN 102686980 B CN102686980 B CN 102686980B CN 201080058122 A CN201080058122 A CN 201080058122A CN 102686980 B CN102686980 B CN 102686980B
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- China
- Prior art keywords
- magnetic field
- magnetic
- magnet
- sensor device
- field sensor
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 88
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 27
- 230000033001 locomotion Effects 0.000 claims abstract description 22
- 239000004615 ingredient Substances 0.000 claims abstract 2
- 230000005415 magnetization Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000010409 thin film Substances 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
- 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
- G01D5/22—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 differentially influencing two coils
- G01D5/2291—Linear or rotary variable differential transformers (LVDTs/RVDTs) having a single primary coil and two secondary coils
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Abstract
The present invention relates to the magnetic field sensor device of a kind of displacement for detecting on motor element, wherein, the change direction in displacement range (6) to be detected in the magnetic field of the magnetic systems on motor element, thus can correspondingly detect the position of its sensor (5) fixing relative to position. Rectilinear motion or the element that moves with other degree of freedom there is at least one magnet (3,4; 7; 11,12; 14) as the ingredient of magnetic systems or there is other a magnetics, the periphery of at least one magnet described or other magnetics is opposed to be configured with the sensor (5) that magnetic direction is sensitive that at least one position is fixing within a predetermined distance, wherein, magnet (3,4; 7; 11,12; 14) preferred orientations in magnetic field is with the oriented at predetermined angles between 0 ° to 90 ° of the displacement (6) relative to described motor element.
Description
Technical field
The present invention relates to the magnetic field sensor device of a kind of displacement for detecting rotation and/or rectilinear motion element, in this magnetic field sensor device, according to the feature as described in the preamble of claim 1, the spatial component in magnetic field changes in displacement range to be detected and can correspondingly be detected.
Background technology
It is known that, such as at speed probe and position sensor, as be used for controlling electromotor be also used in the transmission mechanism control of motor vehicles or driving dynamics control in sensor in, rotary motion or change in location are detected by changes of magnetic field corresponding with rotary motion or change in location. Here, it is common to use Magnetic Sensor known per se, according to application scenario and use field, they can be Hall element, AMR sensor, GMR, TMR sensor or be typically XMR sensor.
Such as, learn from EP00997706B1, in order to detect magnet and in the direction of magnetization linear position between sensor to magnetic-field-sensitive, by magnet configurations in the trend of displacement to be detected so that this magnet has that be distributed over its length and is the magnetic line of force of angle changing with the direction of motion. Thus can determine that sensor is relative to magnet location according to magnetic direction at that time.
Additionally learning from DE19937206C2, one has multiple single magnet relative to the scale of magnetic-field-sensitive sensors motion, and the north and south poles of these magnets points to different directions along scale.
Up to now, these sensor devices are generally used for relatively long measurement displacement detecting, and wherein, or the measurement displacement that sensor ratio has along measuring the measuring cell that displacement is arranged in order is long, or measuring Displacement Ratio sensor to grow relatively. Problem is usually there will be in both cases, as when being installed in motor vehicles when loading a narrower space, for instance, when to brake pedal or gas pedal loading PTS, may often be such that this situation.
Summary of the invention
Therefore, the task of the present invention is, it is achieved can spatially best the sensor unit being used for detecting displacement be installed to inside different operating mechanisms. Therefore, the present invention is starting point for the magnetic field sensor device of detection motor element displacement, wherein, magnetics on motor element or can change direction in the spatial component in the magnetic field of magnetic systems displacement range to be detected on magnetics, thus can correspondingly detect the relative position with sensor. According to the present invention, the element of substantially straight line or also rotary motion is provided with at least one magnet or magnetics, its periphery is opposed to be configured with the sensor of the fixing magnetic-field-sensitive at least one position with previously given distance, wherein, the magnetic field of magnetics is directed at a predetermined angle, this predetermined angular the direction of motion relative to moving component axially and radially between. Here, the angular range of detectable magnetic direction is maximum up to 200 ° in movement detection process.
Such as, when the pedal travel being used for motor vehicles according to the magnetic field sensor device of the present invention is detected, magnetized members may be mounted on operating element, such as it is arranged in motor vehicle braking system, this operating element, on another axis except rectilinear direction to be detected, is rotary motion or with another kind of degree of freedom motion under most cases. Therefore, the present invention installation situation that to be also suitable in motor vehicles narrow, the various application scenarios outside motor vehicle braking system can also be used in but then.
In an advantageous manner, in order to measure the spatial component in magnetic field, using the sensor utilizing XMR effect or Hall element as magnetic field sensor, these sensors detect the change direction in magnetic field respectively in linear motion or in the motor process of other degree of freedom.
According in the magnetic field sensor device of the present invention, in a kind of preferred embodiment, and the angle between the linear movement direction of rotary motion element is advantageously in the scope of 45 °. Therefore, magnetic circuit has at least one direction of magnetization, and the described direction of magnetization is different from the axis of the direction of motion, but is not perpendicular to the axis of the direction of motion. Generating a magnetic field on a sensor by this so-called magnetic field incline direction, this magnetic field has a relatively wide measurement scope in the detectable direction difference of the line of force. But, when using at least two pieces of magnets, between the magnetic direction of these magnets, still suffer from deviation.
If motor element has a toroidal magnet, then this magnetic circuit is implemented as rotational symmetric, thus is can rotate around the axis of the direction of motion, but the magnetic direction not resulted on the sensor detected when rotating changes.
For according to the magnetic circuit of the magnetic field sensor of the present invention it is preferred to also can be made up of around the magnet that the axis of linear movement direction rotates at least one, this magnet generates a magnetic field, and magnetic field stably changes magnetic direction continuously within the scope of straight-line displacement to be measured with dullness. Therefore, when particularly in the measurement displacement grown, magnetic systems can be shorter than measuring displacement.
A relatively short magnetic field sensor and simultaneously also relatively short magnetic systems can be realized by the present invention, but a relatively long measurement displacement (magnetic field sensor and magnetic systems are all short than measuring displacement) can also be realized for the application scenario that structure space is narrow. While it is true, magnetic circuit as described herein generates the magnetic direction change that can detect that as far as possible in measurement displacement.
The present invention can pass through in number of magnets, the direction of magnetization (individually or combinedly) magnetic systems flexibly and realize, and can be used in different structure spaces, different application scenario and have different measurement displacements.
Accompanying drawing explanation
By accompanying drawing, the enforcement example of the present invention is described in detail below. In accompanying drawing:
Fig. 1 is illustrated so-called oblique magnetized schematic diagram by the sensor of two single magnets and a detection magnetic direction;
Fig. 2 is illustrated so-called oblique magnetized schematic diagram by the sensor of a single magnet and a detection magnetic direction;
Fig. 3 illustrates that it has the magnetic field sensor device according to the present invention in the motor vehicle for measuring the embodiment of the device of pedal travel;
Fig. 4 illustrates the detailed view of a toroidal magnet of the magnetic field sensor device shown in Fig. 3.
Detailed description of the invention
In FIG for explaining that the magnetic circuit that the present invention schematically shows is made up of magnet 1 and 2 two pieces single, what wherein diagrammatically illustrate these two pieces of magnets here tilts, along preferred orientations, the magnetic line of force 3 and 4 extended.The magnetic line of force 3 or 4 intersects (being that the magnetic line of force 3 intersects here in the present case) with sensor 5 with a sensor 5 to magnetic-field-sensitive, there it can be seen that the direction of each magnetic line of force 3 or 4 and sensor 5 are relevant just at which relative position in the straight-line displacement section 6 of magnetic circuit. If using a sensor 5, such as, XMR sensor (thin-film magnetoresistive sensor) or Hall element, and the output signal of described sensor is just relevant with the direction of the magnetic line of force 3 or 4 intersected, then utilize this theory structure to may determine that the relative position between the magnetic circuit and sensor 5 being made up of magnet 1,2.
Fig. 2 illustrates another program, carry out this position by a single magnet 7 along preferred orientations skewed magnetization to determine so that the magnetic line of force 8 of this magnet here can determine the relative position between magnet 7 and sensor 5 according to the direction of the magnetic line of force 8 intersected in the way of identical with Fig. 1.
Fig. 3 has illustrated the embodiment of the magnetic field sensor device according to the present invention, the magnetic field sensor device such as measured for pedal travel in motor vehicle braking system, wherein, magnetic-field-sensitive sensors (being equivalent to the sensor 5 in aforementioned figures) is positioned in sensor housing 10. Magnetic circuit has two toroidal magnets 11 and 12, and they can rotate on rotating shaft 13 and can do rectilinear motion along rotating shaft 13.
Fig. 4 illustrates toroidal magnet 11 (or correspondingly 12) as detailed embodiment, and this magnet is here along preferred orientations 14 skewed magnetization, for instance magnetized in 45 ° relative to the rotating shaft 13 according to Fig. 3.
Claims (7)
1. one kind for detecting the magnetic field sensor device of the displacement on motor element, wherein, the spatial component in the magnetic field of the magnetic systems on motor element changes direction in displacement (6) scope to be detected, it is possible to correspondingly detect the position of its sensor (5) fixing relative to position, it is characterized in that, rectilinear motion and the element with an other degree of freedom motion are provided with at least one magnet (3,4; 7; 11,12; 14) as the ingredient of magnetic systems or be provided with other a magnetics, the periphery of at least one magnet described or other magnetics is opposed to be configured with the sensor (5) that magnetic direction is sensitive that at least one position is fixing within a predetermined distance, wherein, magnet (3,4; 7; 11,12; 14) predetermined angular in magnetic field relative to the displacement (6) of described motor element between 0 ° to 90 °.
2. magnetic field sensor device according to claim 1, it is characterised in that described other degree of freedom includes the rotary motion of the rotation axis (13) around motor element.
3. magnetic field sensor device according to claim 1 and 2, it is characterised in that magnet (3,4; 7; 11,12; 14) predetermined angular in magnetic field is 45 °.
4. magnetic field sensor device according to claim 1, it is characterised in that in order to measure the spatial component in magnetic field, at least one magnetic field sensor is the sensor (5) or the Hall element that utilize XMR effect.
5. magnetic field sensor device according to claim 1, it is characterised in that multiple in its magnetization also directed different single magnet be arranged on the periphery of motor element.
6. magnetic field sensor device according to claim 1, it is characterized in that, motor element is arranged at least one toroidal magnet (11,12), this magnet walks upwards to have a magnetic direction at its circumference, the predetermined angular of this magnetic direction relative to the displacement (6) of described motor element between 0 ° to 90 °.
7. according to the application of magnetic field sensor device in any one of the preceding claims wherein, it is characterised in that described magnetic field sensor device is used to the pedal travel in motor vehicles and measures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510867247.8A CN105509775B (en) | 2009-12-21 | 2010-10-22 | For detecting the magnetic field sensor device of motor element displacement |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200910055104 DE102009055104A1 (en) | 2009-12-21 | 2009-12-21 | Magnetic field sensor arrangement for path detection on moving components |
| DE102009055104.2 | 2009-12-21 | ||
| PCT/EP2010/065925 WO2011085833A2 (en) | 2009-12-21 | 2010-10-22 | Magnetic field sensor assembly for capturing travel on movable parts |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510867247.8A Division CN105509775B (en) | 2009-12-21 | 2010-10-22 | For detecting the magnetic field sensor device of motor element displacement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102686980A CN102686980A (en) | 2012-09-19 |
| CN102686980B true CN102686980B (en) | 2016-06-15 |
Family
ID=44149001
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510867247.8A Expired - Fee Related CN105509775B (en) | 2009-12-21 | 2010-10-22 | For detecting the magnetic field sensor device of motor element displacement |
| CN201080058122.6A Expired - Fee Related CN102686980B (en) | 2009-12-21 | 2010-10-22 | For detecting the magnetic field sensor device of motor element displacement |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510867247.8A Expired - Fee Related CN105509775B (en) | 2009-12-21 | 2010-10-22 | For detecting the magnetic field sensor device of motor element displacement |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2516967A2 (en) |
| JP (1) | JP5606550B2 (en) |
| CN (2) | CN105509775B (en) |
| DE (1) | DE102009055104A1 (en) |
| WO (1) | WO2011085833A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509775A (en) * | 2009-12-21 | 2016-04-20 | 罗伯特·博世有限公司 | Magnetic field sensor assembly for capturing travel on movable parts |
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|---|---|---|---|---|
| US9448087B2 (en) * | 2011-10-10 | 2016-09-20 | Methode Electronics, Inc. | Contactless magnetic linear position sensor |
| DE102012214916A1 (en) | 2012-08-22 | 2014-03-20 | Robert Bosch Gmbh | Sensor arrangement for detecting rotational angles on a rotating component |
| DE102012220139A1 (en) | 2012-11-06 | 2014-05-08 | Robert Bosch Gmbh | Magnetic measuring arrangement and corresponding sensor arrangement for detecting the movement of a moving component |
| KR101801536B1 (en) | 2013-05-13 | 2017-11-27 | 주식회사 만도 | Installation structure for pedal stroke sensor |
| JP5946796B2 (en) * | 2013-05-29 | 2016-07-06 | ファナック株式会社 | Rotation detector for detecting rotation of rotating machine, and system including rotation detector |
| CN104667427B (en) * | 2013-11-29 | 2019-02-01 | 上海联影医疗科技有限公司 | The leaf position monitoring device of multi-leaf optical grating, multi-leaf optical grating, radiotherapy apparatus |
| DE102014205566A1 (en) | 2014-03-26 | 2015-10-01 | Robert Bosch Gmbh | Sensor arrangement for path detection on a moving component |
| CN105526852B (en) * | 2014-09-30 | 2019-07-12 | 泰科电子(上海)有限公司 | Neutral gear is reversed gear position sensing sensor and system |
| CN105270559A (en) * | 2014-10-22 | 2016-01-27 | 天津比沃科技有限公司 | Detection mechanism of speed change mechanism of electric bicycle, and speed changing method of electric bicycle |
| DE102014116115A1 (en) | 2014-11-05 | 2016-05-12 | Pierburg Gmbh | Magnet-based measuring system for detecting a movement and / or angular position of a component |
| DE102015205390A1 (en) | 2015-03-25 | 2016-09-29 | Robert Bosch Gmbh | Sensor arrangement for speed detection of a rotating component |
| CN105852872B (en) * | 2016-03-25 | 2019-09-20 | 京东方科技集团股份有限公司 | A kind of sensor device and artificial limb system applied to joint |
| CN107966982B (en) * | 2016-10-18 | 2021-02-09 | 苏州宝时得电动工具有限公司 | Collision trigger device and lawn mower |
| DE102017222676A1 (en) * | 2016-12-29 | 2018-07-05 | Robert Bosch Gmbh | displacement sensor |
| DE102017202365A1 (en) | 2017-02-15 | 2018-08-16 | Robert Bosch Gmbh | sensor device |
| DE102017206025A1 (en) * | 2017-04-07 | 2018-10-11 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Magnetic arrangement for detecting relative movements or relative positions |
| EP3428582B1 (en) * | 2017-07-11 | 2020-03-04 | Sick Ag | Sensor |
| DE102017222063A1 (en) * | 2017-12-06 | 2019-06-06 | Dr. Johannes Heidenhain Gmbh | Inductive position measuring device |
| DE102018220639A1 (en) * | 2018-11-29 | 2020-06-04 | TE Connectivity Sensors Germany GmbH | Device for measuring a position of an object that is linearly movable along a direction of movement, in particular a brake pedal sensor |
| DE102019112572A1 (en) * | 2019-05-14 | 2020-11-19 | HELLA GmbH & Co. KGaA | Device and method for the contactless determination of a position of a pedal |
| CN111163372A (en) * | 2019-12-28 | 2020-05-15 | Oppo广东移动通信有限公司 | Network device |
| CN113587793B (en) * | 2020-04-30 | 2023-11-07 | 财团法人金属工业研究发展中心 | Measuring system of fastener forming machine |
| CN112880539A (en) * | 2021-01-19 | 2021-06-01 | 天津中科华誉科技有限公司 | Non-contact position detection device |
| JP7444143B2 (en) | 2021-07-20 | 2024-03-06 | Tdk株式会社 | magnetic sensor device |
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| JPH06258006A (en) * | 1993-03-02 | 1994-09-16 | Seiko Epson Corp | Displacement sensor |
| EP1031038A1 (en) * | 1998-06-22 | 2000-08-30 | Koninklijke Philips Electronics N.V. | Magnetic position detector |
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| DE102009055104A1 (en) * | 2009-12-21 | 2011-06-22 | Robert Bosch GmbH, 70469 | Magnetic field sensor arrangement for path detection on moving components |
-
2009
- 2009-12-21 DE DE200910055104 patent/DE102009055104A1/en not_active Ceased
-
2010
- 2010-10-22 WO PCT/EP2010/065925 patent/WO2011085833A2/en active Application Filing
- 2010-10-22 JP JP2012543543A patent/JP5606550B2/en not_active Expired - Fee Related
- 2010-10-22 EP EP10768240A patent/EP2516967A2/en not_active Withdrawn
- 2010-10-22 CN CN201510867247.8A patent/CN105509775B/en not_active Expired - Fee Related
- 2010-10-22 CN CN201080058122.6A patent/CN102686980B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509775A (en) * | 2009-12-21 | 2016-04-20 | 罗伯特·博世有限公司 | Magnetic field sensor assembly for capturing travel on movable parts |
| CN105509775B (en) * | 2009-12-21 | 2018-06-12 | 罗伯特·博世有限公司 | For detecting the magnetic field sensor device of motor element displacement |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2516967A2 (en) | 2012-10-31 |
| DE102009055104A1 (en) | 2011-06-22 |
| CN105509775A (en) | 2016-04-20 |
| CN105509775B (en) | 2018-06-12 |
| WO2011085833A2 (en) | 2011-07-21 |
| CN102686980A (en) | 2012-09-19 |
| JP2013515234A (en) | 2013-05-02 |
| JP5606550B2 (en) | 2014-10-15 |
| WO2011085833A3 (en) | 2011-09-15 |
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Granted publication date: 20160615 Termination date: 20201022 |