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 PDF

Info

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
Authority
CN
China
Prior art keywords
magnetic
sensor
motor
magnet
displacement
Prior art date
Application number
CN201080058122.6A
Other languages
Chinese (zh)
Other versions
CN102686980A (en
Inventor
W·威尔施
M·克莱恩克内希特
M·基默勒
K·瓦特
J·基斯纳
J·西登托夫
Original Assignee
罗伯特·博世有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE200910055104 priority Critical patent/DE102009055104A1/en
Priority to DE102009055104.2 priority
Application filed by 罗伯特·博世有限公司 filed Critical 罗伯特·博世有限公司
Priority to PCT/EP2010/065925 priority patent/WO2011085833A2/en
Publication of CN102686980A publication Critical patent/CN102686980A/en
Application granted granted Critical
Publication of CN102686980B publication Critical patent/CN102686980B/en

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING 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
    • G01D5/00Mechanical 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
    • G01D5/12Mechanical 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
    • G01D5/14Mechanical 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
    • G01D5/20Mechanical 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
    • G01D5/22Mechanical 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
    • G01D5/2291Linear or rotary variable differential transformers (LVDTs/RVDTs) having a single primary coil and two secondary coils

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

For detecting the magnetic field sensor device of motor element displacement

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.
CN201080058122.6A 2009-12-21 2010-10-22 For detecting the magnetic field sensor device of motor element displacement CN102686980B (en)

Priority Applications (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

Applications Claiming Priority (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

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
CN201080058122.6A CN102686980B (en) 2009-12-21 2010-10-22 For detecting the magnetic field sensor device of motor element displacement
CN201510867247.8A CN105509775B (en) 2009-12-21 2010-10-22 For detecting the magnetic field sensor device of motor element displacement

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN201510867247.8A 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) CN102686980B (en)
DE (1) DE102009055104A1 (en)
WO (1) WO2011085833A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
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

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
CN107966982A (en) * 2016-10-18 2018-04-27 苏州宝时得电动工具有限公司 Collide trigger device and grass trimmer
DE102017202365A1 (en) 2017-02-15 2018-08-16 Robert Bosch Gmbh Sensor 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

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06258006A (en) * 1993-03-02 1994-09-16 Seiko Epson Corp Displacement sensor
AU4055299A (en) * 1998-06-22 2000-01-10 Koninklijke Philips Electronics N.V. Magnetic position detector
DE19849613A1 (en) * 1998-10-28 2000-05-04 Philips Corp Intellectual Pty Arrangement for measuring a relative linear position
EP1074818A3 (en) * 1999-08-06 2001-10-31 Siemens Aktiengesellschaft Position sensor
DE19937206C2 (en) 1999-06-11 2003-05-08 Siemens Ag Position determination device and use of a position determination device and method for producing a scale for such a device
JP2001280908A (en) * 2000-03-29 2001-10-10 Sony Precision Technology Inc Position detector
US6577123B2 (en) * 2001-06-04 2003-06-10 Delphi Technologies, Inc. Linear position sensor assembly
EP1595114B1 (en) * 2003-02-14 2014-11-12 BEI Sensors & Systems Company, Inc. Position sensor utilizing a linear hall-effect sensor
DE102004011809A1 (en) * 2004-03-11 2005-09-29 Robert Bosch Gmbh The magnetic sensor system
DE102004063539A1 (en) * 2004-03-11 2005-09-29 Robert Bosch Gmbh Magnet sensor for use in gradiometer has two magnetic field sensors on plate bridging V-shaped groove in permanent magnet, arranged so that offset of sensor output is minimized
DE102004057909A1 (en) * 2004-11-30 2006-06-01 Bourns, Inc., Riverside Linear position sensor
JP4776619B2 (en) * 2005-04-19 2011-09-21 パナソニック株式会社 Position sensor, optical head device, head moving mechanism, information recording / reproducing device, and position control system
JP4787601B2 (en) * 2005-11-08 2011-10-05 株式会社東海理化電機製作所 Position detection device
FR2894023B1 (en) * 2005-11-29 2008-02-22 Electricfil Automotive Soc Par Magnetic position sensor for a mobile with a limited linear race
JP4831813B2 (en) * 2006-01-30 2011-12-07 株式会社村上開明堂 Position detecting device and mirror angle detecting device for automobile mirror
RU2460044C2 (en) * 2006-12-21 2012-08-27 Микро-Эпсилон Месстехник Гмбх Унд Ко. Кг Method and measuring device for determining position and/or measuring position of measuring object relative detecting element
DE102009055104A1 (en) * 2009-12-21 2011-06-22 Robert Bosch GmbH, 70469 Magnetic field sensor arrangement for path detection on moving components

Cited By (2)

* Cited by examiner, † Cited by third party
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
DE102009055104A1 (en) 2011-06-22
JP2013515234A (en) 2013-05-02
CN102686980A (en) 2012-09-19
CN105509775A (en) 2016-04-20
WO2011085833A3 (en) 2011-09-15
JP5606550B2 (en) 2014-10-15
EP2516967A2 (en) 2012-10-31
CN105509775B (en) 2018-06-12
WO2011085833A2 (en) 2011-07-21

Similar Documents

Publication Publication Date Title
US10338159B2 (en) Magnetic-field sensor with a back-bias magnet arrangement
US8589105B2 (en) Rotating field sensor
US8729892B2 (en) Differential magnetic field sensor structure for orientation independent measurement
KR101597639B1 (en) Absolute encoder device and motor
EP2944924B1 (en) Multi-turn absolute magnetic encoder
US9097509B2 (en) Rotation angle sensor
US6498474B1 (en) Rotational velocity and direction sensing system
US9103657B2 (en) Magnetic field sensor system with a biasing magnet producing a spatially symmetric magnetic field within a plane being defined by magnetoresistive sensor elements
EP1989505B1 (en) Position sensor with variable direction of magnetization and method of production
US9018944B2 (en) Hall-effect sensor arrangement
CN101929834B (en) Rotational angle-measurement apparatus and rotational speed-measurement apparatus
US8604780B2 (en) Rotating field sensor
CN102177414B (en) Hall effect measuring device
US8421453B2 (en) Magnetic field sensor array for measuring spatial components of a magnetic field
US7557569B2 (en) State measuring apparatus for rotary machine
DE19818799C2 (en) Method and device for measuring angles
EP1969305B1 (en) Position and torque sensor
US8909489B2 (en) Rotating field sensor
US9719771B2 (en) Rotation angle sensor for absolute rotation angle determination even upon multiple revolutions
CN100520303C (en) Magnet sensor arrangement
DE102008008835B4 (en) Device for determining a torque
JP5189206B2 (en) Magnetic position sensor using measured values of magnetic field direction and flux collector
US9347799B2 (en) Magnetic field sensor system with a magnetic wheel rotatable around a wheel axis and with magnetic sensor elements being arranged within a plane perpendicular to the wheel axis
EP0857292B1 (en) Measuring device for contactless capture of the angle of rotation
US5998989A (en) Device including magnet-biased magnetoresistive sensor and rotatable, magnetized encoder for detecting rotary movements

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant