WO2009087504A1 - Dispositif de capteur - Google Patents

Dispositif de capteur Download PDF

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Publication number
WO2009087504A1
WO2009087504A1 PCT/IB2008/054556 IB2008054556W WO2009087504A1 WO 2009087504 A1 WO2009087504 A1 WO 2009087504A1 IB 2008054556 W IB2008054556 W IB 2008054556W WO 2009087504 A1 WO2009087504 A1 WO 2009087504A1
Authority
WO
WIPO (PCT)
Prior art keywords
signal
acceleration
sensor device
linear
speed
Prior art date
Application number
PCT/IB2008/054556
Other languages
English (en)
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 WO2009087504A1 publication Critical patent/WO2009087504A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/16—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by evaluating the time-derivative of a measured speed signal
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/16—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by evaluating the time-derivative of a measured speed signal
    • G01P15/165—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by evaluating the time-derivative of a measured speed signal for measuring angular accelerations
    • 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 invention relates to a sensor device to measure the speed and to determine acceleration of a linear moving element or of a rotating element as claimed in claim 1 and to a method according to claim 13.
  • Rotating elements or linear moving elements are known in the prior art such as a crank shaft of a combustion engine of a vehicle. Therefore sensor device exist which measure the rotation of the element or the speed of a linear moving element.
  • An example for the use of a sensor for measuring the speed of the rotating element is the measurement of speed of a crankshaft of a combustion engine for the control of ignition and fuel injection of Diesel engines.
  • Another example for the use of such sensors is the switch- off of air and fuel supply to combustion engines in special vehicle or engine work situations.
  • Another example for such an use is the measurement of the rotation of the wheels of a vehicle.
  • EP 0 128 582 Bl discloses an anti-locking regulation system for vehicles having wheel speed sensors, wherein a wheel speed sensor is used to measure the wheel speed to control the brake of the vehicle.
  • EP 1 010 984 A2 discloses an acceleration detection method and apparatus using a gear wheel.
  • a sensor device for measuring the linear or rotational speed and for determining the linear or rotational acceleration of a linear moving or rotating element, especially of a crank shaft of a combustion engine, comprising an encoder and a sensor element for detecting the movement or rotation of the encoder and furthermore comprising a converter to convert the signal of the sensor element to a digital signal, wherein a signal evaluator determines the linear or rotational acceleration and generates a linear or rotational acceleration signal from the linear or rotational speed signal and comprising an interface driver and an interface allowing to output the signal of the linear or rotational speed and linear or rotational acceleration.
  • Such a sensor device creates a speed signal and determines an acceleration signal based on the speed signal data which then are transferred to a control unit e.g. of the vehicle.
  • a control unit e.g. of the vehicle.
  • the encoder comprises an encoder disk comprising a modulated circumferential area. It is of advantage that the circumferential area comprises teeth and/or a magnetic modulation.
  • the speed signal and the acceleration signal are generated as separate signals.
  • the speed signal and the acceleration signal are generated as one single combined signal.
  • the acceleration signal may be added to the speed signal or the acceleration signal and the speed signal can be processed to generate an acceleration modulated speed signal or to generate a speed modulated acceleration signal. Accordingly it is another object of the invention to create a method of generating an acceleration signal and a speed signal using an above mentioned sensor device.
  • Fig. 1 shows a schematic view of the inventive sensor device
  • Fig. 2 shows a diagram
  • FIG. 1 shows a schematic view of the inventive sensor device 1.
  • the sensor device consists of an encoder 2 which is mounted on a rotating or rotatable element e.g. of a combustion engine of e.g. a motor vehicle. Since combustions engines especially of motor vehicles are commonly well known, the combustion engine is not further described in detail here.
  • the sensor device 1 furthermore comprises a sensor element 3 which measures or detects the rotation and/or the position of the encoder 2.
  • the sensor element 3 comprises a converter 4, a signal evaluator 5, an interface driver 6 and an interface 7.
  • the converter 4 converts the analogue signal to a digital signal and the signal evaluator evaluates the digital signal from the output of the converter and calculates the acceleration signal on the basis of the digital speed signal.
  • the driver 6 and the interface are responsible to allow other electronic devices to receive the signal information.
  • the encoder 2 is or comprises preferably an encoder disk with or without a reference mark.
  • the encoder may have teeth such that the time of the teeth or the time between the teeth can be measured to obtain a signal representing the rotational speed of the encoder. Since the measured signal will be an analogue signal the analogue-to-digital converter (ADC) converts the analogue signal to a digital signal.
  • the digital signal will be a binary frequency signal. Through comparison between the binary frequency signal with a time signal e.g. from an oscillator a change of the frequency signal may be derivable and as such identified as an acceleration signal of the rotating element.
  • the evaluation of the acceleration signal may be performed based on a plurality of periods of the speed signal. Accordingly it may be advantageous to use a full turning cycle of the encoder to evaluate the acceleration signal. According to the invention it is possible to change or configure the number of periods of the speed signal to generate the acceleration signal.
  • the two signals may be combined to a single signal comprising the signal information of the speed signal and of the acceleration signal. Accordingly it is advantageous to use the sign of the acceleration signal only and to add this information to the speed signal.
  • Another inventive solution uses the speed and the acceleration signal to create a modulated or encoded signal comprising both types of signal information. This combined signal might be a digital signal.
  • the signal might include an acceleration signal, a speed signal and possibly the signal of the identification of the reference mark.
  • the encoder may be a gear wheel or a magnetic encoder disk with a modulated magnetic behaviour along the circumference of the disk. Accordingly the sensing device of the analogue-to-digital converter (ADC) is able to measure the time of the teeth or the space between the teeth or the space of the magnetic modulation when the encoder disk is turning.
  • ADC analogue-to-digital converter
  • Figure 2 shows a diagram 10 to explain the function of the inventive sensor device.
  • the signal curve 11 is displayed in the upper part of the diagram 10.
  • the curve shows an almost the shape of a sine-function which is however modulated with regard to the frequency.
  • the arrows 12 shown at the middle part of the diagram 10 are displaying the time at which the sine-function is zero. Therefore the distance between the arrows 12 is a measure for the frequency or time period of the function 11.
  • the general behaviour of the function In the time window 13 an increasing speed is detected, while in the time window 14 the speed is almost constant, whereas the speed is decreasing in the time window 15.
  • the invention is not limited to the use of measuring crank shafts of an engine but may be used to measure the rotation of other rotating mechanical elements like axles, wheel or the like.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

L'invention porte sur un dispositif de capteur (1) servant à mesurer la vitesse linéaire ou la vitesse de rotation et à déterminer l'accélération linéaire ou l'accélération de rotation d'un élément se déplaçant de façon linéaire ou en tournant, en particulier d'un vilebrequin d'un moteur à combustion. Le dispositif de capteur comporte un codeur (2) et un élément de capteur (3) pour détecter le mouvement ou la rotation du codeur (2). De plus, le dispositif comporte un convertisseur (4) pour convertir le signal de l'élément de capteur en un signal numérique ; un évaluateur de signal (5) déterminant l'accélération linéaire ou de rotation, générant un signal d'accélération linéaire ou de rotation à partir du signal de vitesse linéaire ou de rotation, et comprenant un dispositif de commande d'interface (6) et une interface (7) permettant de délivrer en sortie le signal de la vitesse et de l'accélération linéaire ou de rotation.
PCT/IB2008/054556 2008-01-04 2008-11-03 Dispositif de capteur WO2009087504A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP08100102 2008-01-04
EP08100102.6 2008-01-04

Publications (1)

Publication Number Publication Date
WO2009087504A1 true WO2009087504A1 (fr) 2009-07-16

Family

ID=40568279

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/054556 WO2009087504A1 (fr) 2008-01-04 2008-11-03 Dispositif de capteur

Country Status (1)

Country Link
WO (1) WO2009087504A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11104314B2 (en) 2018-10-23 2021-08-31 Nxp Usa, Inc. Sensor circuit compensation for supply voltage transients

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3746925A (en) * 1972-05-31 1973-07-17 Itt Method and apparatus for determining certain accelerations in an antiskid system
DE2437432A1 (de) * 1973-08-03 1975-02-27 Motorola Inc Digitale zaehl- und steuerlogikschaltung
US3892952A (en) * 1973-03-22 1975-07-01 Nippon Denso Co Digital differentiation circuit
US3943345A (en) * 1974-07-16 1976-03-09 Nippon Soken, Inc. Digital acceleration detecting system
GB1518571A (en) * 1977-04-05 1978-07-19 Reyrolle Parsons Ltd Speed and acceleration measurement
JPS5815159A (ja) * 1981-07-21 1983-01-28 Fanuc Ltd デイジタル速度検出方式
EP0128582A2 (fr) * 1983-06-14 1984-12-19 Robert Bosch Gmbh Système de réglage à antiblocage
US4884227A (en) * 1987-12-11 1989-11-28 Toyota Jidosha Kabushiki Kaisha Speed detecting apparatus for a vehicle
US5740083A (en) * 1996-04-01 1998-04-14 Ford Motor Company Delta time measurement circuit for determining parameter derivatives of a rotational velocity sensor signal
WO1999049322A1 (fr) * 1998-03-20 1999-09-30 Continental Teves Ag & Co. Ohg Ensemble capteur destine a la detection de mouvements
EP1010984A2 (fr) * 1998-12-18 2000-06-21 General Motors Corporation Procédé et dispositif de détection de l'accélération

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3746925A (en) * 1972-05-31 1973-07-17 Itt Method and apparatus for determining certain accelerations in an antiskid system
US3892952A (en) * 1973-03-22 1975-07-01 Nippon Denso Co Digital differentiation circuit
DE2437432A1 (de) * 1973-08-03 1975-02-27 Motorola Inc Digitale zaehl- und steuerlogikschaltung
US3943345A (en) * 1974-07-16 1976-03-09 Nippon Soken, Inc. Digital acceleration detecting system
GB1518571A (en) * 1977-04-05 1978-07-19 Reyrolle Parsons Ltd Speed and acceleration measurement
JPS5815159A (ja) * 1981-07-21 1983-01-28 Fanuc Ltd デイジタル速度検出方式
EP0128582A2 (fr) * 1983-06-14 1984-12-19 Robert Bosch Gmbh Système de réglage à antiblocage
US4884227A (en) * 1987-12-11 1989-11-28 Toyota Jidosha Kabushiki Kaisha Speed detecting apparatus for a vehicle
US5740083A (en) * 1996-04-01 1998-04-14 Ford Motor Company Delta time measurement circuit for determining parameter derivatives of a rotational velocity sensor signal
WO1999049322A1 (fr) * 1998-03-20 1999-09-30 Continental Teves Ag & Co. Ohg Ensemble capteur destine a la detection de mouvements
EP1010984A2 (fr) * 1998-12-18 2000-06-21 General Motors Corporation Procédé et dispositif de détection de l'accélération

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11104314B2 (en) 2018-10-23 2021-08-31 Nxp Usa, Inc. Sensor circuit compensation for supply voltage transients

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