WO2009016593A3 - Sensor for detecting a moving direction - Google Patents

Sensor for detecting a moving direction Download PDF

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Publication number
WO2009016593A3
WO2009016593A3 PCT/IB2008/053054 IB2008053054W WO2009016593A3 WO 2009016593 A3 WO2009016593 A3 WO 2009016593A3 IB 2008053054 W IB2008053054 W IB 2008053054W WO 2009016593 A3 WO2009016593 A3 WO 2009016593A3
Authority
WO
WIPO (PCT)
Prior art keywords
voltages
sample
vibration
target wheel
detecting
Prior art date
Application number
PCT/IB2008/053054
Other languages
French (fr)
Other versions
WO2009016593A2 (en
Original Assignee
Nxp Bv
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
Application filed by Nxp Bv filed Critical Nxp Bv
Publication of WO2009016593A2 publication Critical patent/WO2009016593A2/en
Publication of WO2009016593A3 publication Critical patent/WO2009016593A3/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P13/00—Indicating or recording presence, absence, or direction, of movement
    • G01P13/02—Indicating direction only, e.g. by weather vane
    • G01P13/04—Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement

Abstract

It is described a sensor and a method for detecting a moving direction as well as vibration of for example a target wheel. It is disclosed, that the substraction of voltages U1 and U2 (speed signal) from the magnetoresistive bridge will be amplified and converted into a pulse train. A bottom path is used to sum up the two half-bridge signals. A sample and hold element 25 is controlled by the internal state machine 24 and used to sample the addition of voltages U1 and U2 (sum signal) as the transitions of the substraction of voltages U1 and U2 (speed signal). A comparator 27 determines, whether the addition of voltages U1 and U2 (sum signal) is within the hysteresis window around the value held by the sample and hold element 25 or outside of this window. This information is used by the state machine 24 in order to detect a possible vibration of the target wheel. If no vibration is detected, the sign of the comparator output gives the direction of the target wheel.
PCT/IB2008/053054 2007-08-02 2008-07-30 Sensor for detecting a moving direction WO2009016593A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07113690.7 2007-08-02
EP07113690 2007-08-02

Publications (2)

Publication Number Publication Date
WO2009016593A2 WO2009016593A2 (en) 2009-02-05
WO2009016593A3 true WO2009016593A3 (en) 2009-03-26

Family

ID=40149816

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/053054 WO2009016593A2 (en) 2007-08-02 2008-07-30 Sensor for detecting a moving direction

Country Status (1)

Country Link
WO (1) WO2009016593A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0544424A1 (en) * 1991-11-27 1993-06-02 Lucas Industries Public Limited Company Apparatus for detecting movement
DE19717364C1 (en) * 1997-04-24 1998-08-27 Siemens Ag Method for identifying direction of rotation of wheel using Hall effect probes
US20050024042A1 (en) * 2002-05-25 2005-02-03 Ruediger Block Method and device for the detection of the movement of an element
US20050278136A1 (en) * 2004-05-26 2005-12-15 Infineon Technologies Ag Method for detecting disturbances when determining the rotational speed of a rotor and evaluation circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0544424A1 (en) * 1991-11-27 1993-06-02 Lucas Industries Public Limited Company Apparatus for detecting movement
DE19717364C1 (en) * 1997-04-24 1998-08-27 Siemens Ag Method for identifying direction of rotation of wheel using Hall effect probes
US20050024042A1 (en) * 2002-05-25 2005-02-03 Ruediger Block Method and device for the detection of the movement of an element
US20050278136A1 (en) * 2004-05-26 2005-12-15 Infineon Technologies Ag Method for detecting disturbances when determining the rotational speed of a rotor and evaluation circuit

Also Published As

Publication number Publication date
WO2009016593A2 (en) 2009-02-05

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