EP1234367A1 - Dispositif et procede pour detecter une situation de coincement au niveau de surfaces d'automobile - Google Patents

Dispositif et procede pour detecter une situation de coincement au niveau de surfaces d'automobile

Info

Publication number
EP1234367A1
EP1234367A1 EP01982158A EP01982158A EP1234367A1 EP 1234367 A1 EP1234367 A1 EP 1234367A1 EP 01982158 A EP01982158 A EP 01982158A EP 01982158 A EP01982158 A EP 01982158A EP 1234367 A1 EP1234367 A1 EP 1234367A1
Authority
EP
European Patent Office
Prior art keywords
input signal
comparison value
drive
analog sensors
rotational acceleration
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP01982158A
Other languages
German (de)
English (en)
Inventor
Marcus Meyer
Markus G. Kliffken
Stefan Kotthaus
Joerg Wolf
Michael Soellner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1234367A1 publication Critical patent/EP1234367A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
    • H02H7/0851—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load for motors actuating a movable member between two end positions, e.g. detecting an end position or obstruction by overload signal
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/006—Calibration or setting of parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/093—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against increase beyond, or decrease below, a predetermined level of rotational speed

Definitions

  • the electric drives are therefore equipped with an anti-trap device. Tightening legal regulations state that the drive must be reversed before a preselectable maximum force occurs when pinching in order to release the pinched body again.
  • DC motors are usually used to move the windows or sunroofs on worm gear.
  • the rotational speed is determined as the time which elapses between two changes in the signal of a sensor working as a Hall element.
  • the direction of rotation of the drive motor and the drive shaft results from the sequence of the edges of the pulses of the further sensor element.
  • the increased scanning can also lead to numerical problems, which are due to the number representation of finite word length in electronic computers.
  • gearwheels Another option for generating and scanning signals would be the use of gearwheels, but the space available is generally not sufficient for their installation.
  • analog sensors which is followed by a simple signal evaluation by means of two differentiations with direct decision-making via a comparison operation.
  • analog sensors that take up little installation space, such as analog magnetic resistors, means that digitally operating Hall sensors, which have only a limited resolution, can be dispensed with.
  • Analog sensors such as magnetic resistors, for example, have better temperature stability and also deliver a larger output signal.
  • the higher sensitivity results in an achievable accuracy which has a resolution of the angular positions of a drive element - be it a drive motor or a drive shaft - of ⁇ ⁇ 1 °. Such a resolution is to be regarded as completely sufficient for the detection of a pinching situation.
  • the motor angle or the drive shaft angle ⁇ can be measured extremely inexpensively, from whose two differentiations the rotational acceleration can be determined. This avoids a considerably more complex and expensive direct measurement of the rotational speed or the rotational acceleration of the drive shaft and drive motor.
  • the adapted comparison value is preferably determined taking into account the input signal ⁇ , the motor temperature ⁇ -, the window or roof position x and the applied voltage U A. The comparison value thus bears both the operating parameters on the drive motor as well as environmental influences such as the outside temperature.
  • the input signal ⁇ is recorded by means of analog sensors before the input signal ⁇ is present in digital form after an analog / digital conversion and is subjected to signal processing in which the input signal ⁇ undergoes two differentiations.
  • the rotational acceleration obtained in this way is compared with an adapted comparison value. If the rotational acceleration obtained is less than the comparison value, there is a pinching situation, so that the respective drive motor is reversed and the pinching situation is eliminated.
  • Fig. 1 the drive and control components for moving Fenst ER 'and roof surfaces of a motor vehicle
  • Fig. 3 shows a signal processing for determining the rotational acceleration from a
  • Fig. 4 is a quantized angle measurement
  • Fig. 5 shows a digital signal processing using quantized angle measurement.
  • FIG. 1 shows the drive and control components that are used for moving window surfaces and sunroofs in motor vehicles.
  • a drive motor 1 is connected via a drive shaft 3 to a gear 2, which can be designed, for example, as a self-locking worm gear.
  • the transmission 2 transmits the rotary movement of the drive motor 1 to the respective window pane or the respective sunroof, which then moves in a translatory manner.
  • the signals detected by the sensors 5, 6 are fed to a signal processing system which consists of an evaluation unit 7 and electronics 8 connected downstream thereof.
  • the sensor element 5 serves to determine the rotational speed, while the direction of rotation of the drive components, such as drive shaft 3 and drive motor 1, can be detected by means of the further sensor element 6.
  • a signal processing according to the Invention is shown, in which the rotational acceleration from an input signal 13, the angle of rotation ⁇ is determined. Since neither the rotational acceleration nor the rotational speed of drive components such as drive shaft 3 and drive motor 1 can be directly measured inexpensively, the angle of rotation ⁇ is measured according to the invention.
  • the input signal 13 rotation angle ⁇ is compared after two differentiations 18, 19 as rotational acceleration 24 in a comparison unit with an adapted threshold value 23.
  • the formation of this threshold value 23 takes into account the input signal 13, namely the rotation angle ⁇ , the engine temperature ⁇ and the applied one Voltage U A , designated by reference reference numeral 21.
  • the adapted comparison value 23, formed taking into account the variables mentioned above, is regarded as a fixed comparison value 23 with an ideally accurate angle measurement and ideally continuous signal processing as sufficiently precise.
  • FIG. 4 shows the typical profile of the applied voltage 21 U A , plotted against the angle of rotation ⁇ of the drive motor 1, for an analog magnetic resistance, which according to the invention can be directly assigned to the drive shaft under the drive motor 1 as sensor element 5, 6.
  • the quantized angle measurement that can be implemented with such analog sensors 5, 6 permits a resolution of less than 1 °, that is, ⁇ ⁇ 1 °.
  • the magnetic resistors used as sensor elements 5, 6 have, in addition to a resolution of less than 1 °, better temperature stability and a greater resolution. Furthermore, a better resolution is given by a lower dependence on the air gap between sensors 5, 6 and the magnet 4 on the respective drive component 1 or 3.
  • the resolution of ⁇ ⁇ 1 ° which can be achieved by means of the magnetic resistance used as sensor elements 5, 6 is sufficient for reliable detection of a pinching situation, provided that the angle signal 13, namely ⁇ , has a suitable band limitation due to a low-pass filter.
  • the accuracy that can be determined by a sensor 5, 6 by output signal ⁇ d there is a linear relationship between the accuracy that can be determined by a sensor 5, 6 by output signal ⁇ d , taking into account the quantization ⁇ d of an A / D converter 14, which is supplied with the analog input signal 13 ⁇ and the sampling time 17 which can be set on the sample / hold element 15.
  • the bandwidth decreases, which in turn increases the available sampling time.
  • the relationship between the resolution at the sensor 5, 6 and the sampling time 17 can best be illustrated using the following comparison:
  • the input signal 13, namely the angle of rotation ⁇ is quantized from analog to digital in an A / D converter 14,... From which the digital signal 16 is sent to a first differentiation stage 18 and can also be supplied to a comparison unit 23, which determines an adapted comparison value 23 with which the rotational acceleration 24 resulting from repeated differentiation 19 is compared.
  • the comparison unit 23 the temperature ⁇ . as well as the applied motor voltage U A , which permit a determination of a respectively adapted comparison value 23 with which the digital signal 24 resulting from the two differentiations 18, 19 representing the rotational acceleration ' can be compared.

Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Window Of Vehicle (AREA)
  • Power-Operated Mechanisms For Wings (AREA)

Abstract

L'invention concerne un dispositif et un procédé permettant de détecter une situation de coincement au niveau de surfaces de véhicules, pouvant être déplacées par des mécanismes d'entraînement (1). Des éléments de détection (5, 6) sont associés aux éléments d'entraînement (1, 3), qui détectent la vitesse de rotation et le sens de rotation des éléments d'entraînement (1, 3) et transmettent des signaux à une unité d'évaluation (7, 8). Les éléments de détection (5, 6) se présentent sous forme de détecteurs analogiques dont les signaux angulaires (13) sont comparés à une valeur de comparaison (23) adaptée, après une double différenciation (18, 19).
EP01982158A 2000-09-30 2001-09-27 Dispositif et procede pour detecter une situation de coincement au niveau de surfaces d'automobile Withdrawn EP1234367A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2000148602 DE10048602A1 (de) 2000-09-30 2000-09-30 Vorrichtung und Verfahren zur Detektion einer Einklemmsituation bei bewegten Flächen am Kraftfahrzeug
DE10048602 2000-09-30
PCT/DE2001/003714 WO2002029951A1 (fr) 2000-09-30 2001-09-27 Dispositif et procede pour detecter une situation de coincement au niveau de surfaces d'automobile

Publications (1)

Publication Number Publication Date
EP1234367A1 true EP1234367A1 (fr) 2002-08-28

Family

ID=7658301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01982158A Withdrawn EP1234367A1 (fr) 2000-09-30 2001-09-27 Dispositif et procede pour detecter une situation de coincement au niveau de surfaces d'automobile

Country Status (3)

Country Link
EP (1) EP1234367A1 (fr)
DE (1) DE10048602A1 (fr)
WO (1) WO2002029951A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10231450A1 (de) * 2002-07-11 2004-01-29 Robert Bosch Gmbh Hochauflösende Drehwinkelsensorik für Gleichstrommotoren
DE102005062235B3 (de) 2005-12-22 2007-09-13 Rausch & Pausch Gmbh Lastabhängige Betätigungsanordnung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4000730A1 (de) * 1990-01-12 1991-08-01 Bosch Gmbh Robert Verfahren und vorrichtung zum betreiben von fremdkraftbetaetigten teilen mit einklemmgefahr
US5483135A (en) * 1994-06-06 1996-01-09 Ford Motor Company Adaptive system and method for controlling vehicle window operation
DE19618219B4 (de) * 1996-05-07 2004-04-29 Robert Bosch Gmbh Vorrichtung zur elektronischen Überwachung eines Verstellantriebs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0229951A1 *

Also Published As

Publication number Publication date
WO2002029951A1 (fr) 2002-04-11
DE10048602A1 (de) 2002-04-11

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