WO2009069021A1 - Sensor device for detecting movement - Google Patents

Sensor device for detecting movement Download PDF

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Publication number
WO2009069021A1
WO2009069021A1 PCT/IB2008/054343 IB2008054343W WO2009069021A1 WO 2009069021 A1 WO2009069021 A1 WO 2009069021A1 IB 2008054343 W IB2008054343 W IB 2008054343W WO 2009069021 A1 WO2009069021 A1 WO 2009069021A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensor
sensor device
incremental encoder
temperature
anyone
Prior art date
Application number
PCT/IB2008/054343
Other languages
French (fr)
Inventor
Torsten Philipp
Bernd Baranski
Original Assignee
Nxp B.V.
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 B.V. filed Critical Nxp B.V.
Publication of WO2009069021A1 publication Critical patent/WO2009069021A1/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
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/443—Devices characterised by the use of electric or magnetic means for measuring angular speed mounted in bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0097—Electrical control of supply of combustible mixture or its constituents using means for generating speed signals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
    • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
    • F02D41/28—Interface circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/489—Digital circuits therefor

Definitions

  • the present invention relates to a sensor device for detecting movement of an element comprising an incremental encoder and a method for manufacturing such a sensor device and a system comprising such a sensor device.
  • the document US 7,168,422 Bl shows a control apparatus for an internal combustion engine, which can avoid overreaction at a lean side of air fuel ratio learning correction by unburnt fuel in a blowby gas. It is described that a temperature detecting section detects the temperature of the engine based on signals of various sensors.
  • the invention provides a sensor device comprising: an incremental encoder for detecting movement of an element; a further sensor for detecting a further characteristics of the element; whereas the incremental encoder and the further sensor have a common interface to provide the measurements. Further, the invention provides a method for manufacturing a sensor device, whereas an already existing incremental encoder is replaced by a sensor device according to anyone of the claims 1 to 8. Furthermore, the invention provides a system comprising: a sensor device according to anyone of the claims 1 to 8; and an element, especially gear wheel, whereas the incremental encoder is adapted to measure the movement, especially rotation, of the element; whereas the further sensor is adapted to measure a further characteristics of the element, especially the temperature.
  • the sensor device is adapted that at different times the incremental encoder or the further device are measuring. This enables to use the same sensor equipment for different applications.
  • the sensor device is adapted that the further sensor is measuring during the incremental encoder is not measuring.
  • an incremental encoder is characterised by periods which could be used for further applications of measurement.
  • the incremental encoder is a magnetic encoder or a magneto -resistive encoder.
  • the further sensor is a temperature sensor.
  • the temperature sensor is adapted to initiate a signal, if the temperature is not in the operating range of the temperature sensor.
  • the sensor device comprises an integrated circuit. Especially with the application of a integrated circuit it is possible to use the equipment of a sensor device for gathering different measurement values.
  • the incremental sensor and the further sensor have a common case.
  • the assembly of the sensor device is easier.
  • the replacement of single-tasking sensor devices with multi-tasking sensor devices will be uncomplex.
  • a gist of the present invention may be seen as a gist of the present invention to provide a speed sensor that is able to signalize the temperature additionally to the speed information.
  • This sensor device will be used in automotive applications to ease control of combustion engines especially at start up reducing uncombusted exhaust gas and pollution.
  • this sensor device fits into existing mechanical arrangement replacing other sensors with fewer capability.
  • System integration can be done easily by software adoption.
  • Fig. 1 shows an embodiment of the invention in principle arrangement
  • Fig. 2 shows an embodiment in principle.
  • a speed sensor is proposed that is able to signalize the temperature additionally to the speed information incremental speed sensor with temperature measurement.
  • the sensor is proposed to be used in automotive applications to ease control of combustion engines especially at start up reducing uncombusted exhaust gas and pollution.
  • the sensor fits into existing mechanical arrangement replacing other sensors with fewer capability. System integration can be done easily by software adoption.
  • Fig. 1 shows a moving encoder 101, whereas the signals of these encoder will be converted in electrical values by the electric converter 102. Further there is a evaluation of the signal by the signal evaluation 103. The signal will then be pushed to the interface driver, which prepares the signal for the transmission by the interface 106
  • Fig. 2 shows an arrangement for measuring of temperature between two subsequent incidents (tooth flanks). Calculation of mean value or gliding mean value over a number of incidents could be performed, if necessary.
  • the original signal is depicted as reference sign 201.
  • the arrows 202 show the incident (tooth flank).
  • the reference sign 203 depicts the line coding.
  • the temperature should be measured and outputted. It should be the whole working area of the sensor (-40...150°) be covered, be measured and outputted. The accuracy should be 1°.
  • the sensor can be used as an addition as well as replacement and reduction of present sensors.
  • the analyze of the signal concerning the above-mentioned parameters should be executed already in the sensor device and only a condensed representation should be transmitted, which is as far as possible compatible to well-known systems.
  • Enhancement of the function of a for example already present electronic (especially mono lit hically) integrated circuit which evaluates signals of an especially magneto-sensor and for transmission of information especially on a line.
  • the sensor device can be provided comprising an integrated solution (monolithic, hybrid, SIP, etc.) with an electrical signal transformer, signal processing, an especially electrical interface as well as means for transmission of signals.
  • the embodiments according to the invention have several advantages: Addition of an already present sensor in a car (especially a crank shaft sensor or wheel speed sensor) which provides further kinds of signals. Use of already present network of the car (no additional mounting of a further sensor, cable, electronic control unit, etc.). A further advantage with increasing importance: There are no additional sensors in the car necessary, which detect the further values. Therefore, problems because of crosstalk or EMC problems will not be caused.
  • the invention may be applied for recognition and signalization of absolute values and changes of fixed movement conditions in (car) drives (gears, motors, wheels) or in other industrial applications (elevator, rope guides, etc.). Further applications could be motor revolution measurement (and if a further reference signs examination is performed additional a determination of the angle of rotation is possible) as an input value for controlling systems for motors, especially for the combustion motors and electrical drives. Further possibilities to use as a simple speedometer with outdoor temperature as well as motorbike ABS wheel revolution sensor. It should be noted that the term 'comprising' does not exclude other elements or steps and the 'a' or 'an' does not exclude a plurality. Also elements described in association with the different embodiments may be combined.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

The invention provides a sensor device comprising: an incremental encoder (101) for detecting movement of an element; a further sensor for detecting a further characteristics of the element; whereas the incremental encoder (101) and the further sensor have a common interface (106) to provide the measurements. Further it is provided a method for manufacturing a corresponding sensor device and a system, which comprises such a system.

Description

SENSOR DEVICE FOR DETECTING MOVEMENT
DESCRIPTION
Field of the Invention
The present invention relates to a sensor device for detecting movement of an element comprising an incremental encoder and a method for manufacturing such a sensor device and a system comprising such a sensor device.
Background of the Invention
The document US 7,168,422 Bl shows a control apparatus for an internal combustion engine, which can avoid overreaction at a lean side of air fuel ratio learning correction by unburnt fuel in a blowby gas. It is described that a temperature detecting section detects the temperature of the engine based on signals of various sensors.
Summary of the Invention
To fulfil the above-mentioned features several sensors and a huge amount of connections and cables are necessary. Therefore, it needs a considerable technical equipment to arrive at the demanded features.
Therefore, it would be desirable to provide an improved sensor device which would lead to a reduced amount of technical equipment.
The invention provides a sensor device comprising: an incremental encoder for detecting movement of an element; a further sensor for detecting a further characteristics of the element; whereas the incremental encoder and the further sensor have a common interface to provide the measurements. Further, the invention provides a method for manufacturing a sensor device, whereas an already existing incremental encoder is replaced by a sensor device according to anyone of the claims 1 to 8. Furthermore, the invention provides a system comprising: a sensor device according to anyone of the claims 1 to 8; and an element, especially gear wheel, whereas the incremental encoder is adapted to measure the movement, especially rotation, of the element; whereas the further sensor is adapted to measure a further characteristics of the element, especially the temperature.
Further embodiments are incorporated in the dependent claims. It should be noted that the following described exemplary embodiments of the invention apply also for the method, the device and the system.
According to an exemplary embodiment the sensor device is adapted that at different times the incremental encoder or the further device are measuring. This enables to use the same sensor equipment for different applications.
According to an exemplary embodiment the sensor device is adapted that the further sensor is measuring during the incremental encoder is not measuring. Especially an incremental encoder is characterised by periods which could be used for further applications of measurement. According to an exemplary embodiment the incremental encoder is a magnetic encoder or a magneto -resistive encoder.
According to an exemplary embodiment the further sensor is a temperature sensor.
According to an exemplary embodiment the temperature sensor is adapted to initiate a signal, if the temperature is not in the operating range of the temperature sensor.
According to an exemplary embodiment the sensor device comprises an integrated circuit. Especially with the application of a integrated circuit it is possible to use the equipment of a sensor device for gathering different measurement values.
According to an exemplary embodiment the incremental sensor and the further sensor have a common case. In case of a common case the assembly of the sensor device is easier. Further, the replacement of single-tasking sensor devices with multi-tasking sensor devices will be uncomplex.
It may be seen as a gist of the present invention to provide a speed sensor that is able to signalize the temperature additionally to the speed information. This sensor device will be used in automotive applications to ease control of combustion engines especially at start up reducing uncombusted exhaust gas and pollution.
Advantageously, this sensor device fits into existing mechanical arrangement replacing other sensors with fewer capability. System integration can be done easily by software adoption.
It should be noted that the above features may also be combined. The combination of the above features may also lead to synergetic effects, even if not explicitly described in detail.
These and other aspects of the present invention will become apparent from and elucidated with reference to the embodiments described hereinafter.
Brief Description of the Drawings Exemplary embodiments of the present invention will be described in the following with reference to the following drawings.
Fig. 1 shows an embodiment of the invention in principle arrangement; Fig. 2 shows an embodiment in principle.
Detailed Description of Exemplary Embodiments
A speed sensor is proposed that is able to signalize the temperature additionally to the speed information incremental speed sensor with temperature measurement. The sensor is proposed to be used in automotive applications to ease control of combustion engines especially at start up reducing uncombusted exhaust gas and pollution. Advantageously the sensor fits into existing mechanical arrangement replacing other sensors with fewer capability. System integration can be done easily by software adoption. It is provided an arrangement for measurement of rotary- or movement velocities of a sensor device relative to an incremental encoder with or without reference sign, whereas the movement of the incremental encoder will be detected and preferably shown as a binary switching signal per increment (tooth incident), whereas the temperature is determined, whereas the temperature is in the range of —40 to 1500C, if necessary it is to limit: the voltage- or current value, whereas the tooth incident and the temperature signal are both coded or modulated as binary values. Further the data value for the average temperature signal can be outputted above several tooth incidents, whereas a recognized reference sign can be in the encodement, whereas the arrangement has means for configuration of the behaviour. For these applications especially a magneto-, magneto -resistant movement sensor can be used.
Well-known systems for detection of the revolution speed generate a mostly binary and intensely varying temporary electrical representation of a moving incremental encoder. The high border frequency for the tooth incident should be 20 kHz.
Fig. 1 shows a moving encoder 101, whereas the signals of these encoder will be converted in electrical values by the electric converter 102. Further there is a evaluation of the signal by the signal evaluation 103. The signal will then be pushed to the interface driver, which prepares the signal for the transmission by the interface 106
(e.g. a line).
Fig. 2 shows an arrangement for measuring of temperature between two subsequent incidents (tooth flanks). Calculation of mean value or gliding mean value over a number of incidents could be performed, if necessary. The original signal is depicted as reference sign 201. The arrows 202 show the incident (tooth flank). The reference sign 203 depicts the line coding.
For reduction and as an alternative for present sensors, as well as further information (for example brake systems, ABS) the temperature should be measured and outputted. It should be the whole working area of the sensor (-40...150°) be covered, be measured and outputted. The accuracy should be 1°. The sensor can be used as an addition as well as replacement and reduction of present sensors.
According to the invention the analyze of the signal concerning the above-mentioned parameters should be executed already in the sensor device and only a condensed representation should be transmitted, which is as far as possible compatible to well-known systems.
Enhancement of the function of a for example already present electronic (especially mono lit hically) integrated circuit, which evaluates signals of an especially magneto-sensor and for transmission of information especially on a line.
The sensor device can be provided comprising an integrated solution (monolithic, hybrid, SIP, etc.) with an electrical signal transformer, signal processing, an especially electrical interface as well as means for transmission of signals.
The embodiments according to the invention have several advantages: Addition of an already present sensor in a car (especially a crank shaft sensor or wheel speed sensor) which provides further kinds of signals. Use of already present network of the car (no additional mounting of a further sensor, cable, electronic control unit, etc.). A further advantage with increasing importance: There are no additional sensors in the car necessary, which detect the further values. Therefore, problems because of crosstalk or EMC problems will not be caused.
It should be noted that the invention may be applied for recognition and signalization of absolute values and changements of fixed movement conditions in (car) drives (gears, motors, wheels) or in other industrial applications (elevator, rope guides, etc.). Further applications could be motor revolution measurement (and if a further reference signs examination is performed additional a determination of the angle of rotation is possible) as an input value for controlling systems for motors, especially for the combustion motors and electrical drives. Further possibilities to use as a simple speedometer with outdoor temperature as well as motorbike ABS wheel revolution sensor. It should be noted that the term 'comprising' does not exclude other elements or steps and the 'a' or 'an' does not exclude a plurality. Also elements described in association with the different embodiments may be combined.
It should be noted that the reference signs in the claims shall not be construed as limiting the scope of the claims.
List of reference signs:
101 moving encoder
102 electric converter 103 signal evaluation
104 interface driver
105 sensor
106 interface (e.g. line) 201 signal 202 incident (tooth flank)
203 line coding

Claims

1. Sensor device comprising: an incremental encoder (101) for detecting movement of an element; a further sensor for detecting a further characteristics of the element; whereas the incremental encoder (101) and the further sensor have a common interface (106) to provide the measurements.
2. Sensor device according to claim 1, whereas the sensor device is adapted that at different times the incremental encoder (101) or the further device are measuring.
3. Sensor device according to anyone of the claims 1 or 2, whereas the sensor device is adapted that the further sensor is measuring during the incremental encoder ( 101 ) is not measuring.
4. Sensor device according to anyone of the claims 1 to 3, whereas the incremental encoder (101) is a magnetic encoder or a magneto -resistive encoder.
5. Sensor device according to anyone of the claims 1 to 4, whereas the further sensor is a temperature sensor.
6. Sensor device according to claim 5, whereas the temperature sensor is adapted to initiate a signal, if the temperature is not in the operating range of the temperature sensor.
7. Sensor device according to anyone of the claims 1 to 6, whereas the sensor device comprises an integrated circuit.
8. Sensor device according to anyone of the claims 1 to 7, whereas the incremental encoder (101) and the further sensor have a common case.
9. Method for manufacturing a sensor device, whereas an already existing incremental encoder (101) is replaced by a sensor device according to anyone of the claims 1 to 8.
10. System comprising: a sensor device according to anyone of the claims 1 to 8; and an element, especially gear wheel, whereas the incremental encoder (101) is adapted to measure the movement, especially rotation, of the element; whereas the further sensor is adapted to measure a further characteristics of the element, especially the temperature.
PCT/IB2008/054343 2007-11-28 2008-10-22 Sensor device for detecting movement WO2009069021A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07121816 2007-11-28
EP07121816.8 2007-11-28

Publications (1)

Publication Number Publication Date
WO2009069021A1 true WO2009069021A1 (en) 2009-06-04

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19650935A1 (en) * 1996-12-07 1998-06-10 Teves Gmbh Alfred Method and circuit arrangement for the transmission of speed information and additional data
DE10150760A1 (en) * 2000-12-06 2002-08-14 Continental Teves Ag & Co Ohg Measurement of wheel rotational velocity and tire pressure for use in a motor vehicle control system, with velocity and pressure signals transmitted over the same interface so that additional hardware is not required
JP2003013948A (en) * 2001-06-26 2003-01-15 Nsk Ltd Rotary bearing device with sensor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19650935A1 (en) * 1996-12-07 1998-06-10 Teves Gmbh Alfred Method and circuit arrangement for the transmission of speed information and additional data
DE10150760A1 (en) * 2000-12-06 2002-08-14 Continental Teves Ag & Co Ohg Measurement of wheel rotational velocity and tire pressure for use in a motor vehicle control system, with velocity and pressure signals transmitted over the same interface so that additional hardware is not required
JP2003013948A (en) * 2001-06-26 2003-01-15 Nsk Ltd Rotary bearing device with sensor

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