WO2001060663A1 - Procede et dispositif pour controler un dispositif de detection, notamment un dispositif de detection d'acceleration contenu dans un systeme de protection pour passagers de vehicules - Google Patents

Procede et dispositif pour controler un dispositif de detection, notamment un dispositif de detection d'acceleration contenu dans un systeme de protection pour passagers de vehicules Download PDF

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Publication number
WO2001060663A1
WO2001060663A1 PCT/DE2001/000448 DE0100448W WO0160663A1 WO 2001060663 A1 WO2001060663 A1 WO 2001060663A1 DE 0100448 W DE0100448 W DE 0100448W WO 0160663 A1 WO0160663 A1 WO 0160663A1
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WO
WIPO (PCT)
Prior art keywords
signal
test
sensor device
output signal
test output
Prior art date
Application number
PCT/DE2001/000448
Other languages
German (de)
English (en)
Inventor
Telmo Glaser
Gerhard Mader
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2001060663A1 publication Critical patent/WO2001060663A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R21/0132—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to vehicle motion parameters, e.g. to vehicle longitudinal or transversal deceleration or speed value
    • 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
    • G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
    • G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
    • G01P15/125—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by capacitive pick-up
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R2021/01122—Prevention of malfunction
    • B60R2021/01184—Fault detection or diagnostic circuits
    • B60R2021/0119—Plausibility check

Definitions

  • the invention relates to a method and a device for checking a sensor device, in particular an acceleration sensor device contained in a vehicle mass protection system.
  • Sensor devices in particular acceleration sensor devices, used in vehicle occupant protection systems generally have integrated signal processing in which, for example, an amplifier and a low-pass filter are combined to form an electronic assembly together with the sensor.
  • an active self-test of the acceleration sensor device and further elements of the occupant protection system are usually carried out.
  • a piezoelectric acceleration sensor or a capacitively operating acceleration sensor is brought electrostatically into a state corresponding to an acceleration by applying an electrical field or a voltage.
  • the output of the sensor device thus responds to the applied voltage with an output signal that corresponds to the sensation of an acceleration.
  • This output signal becomes static, i. H. with regard to its maximum value, evaluated in order to check the function of the sensor and the associated signal processing.
  • the invention is based on the object of specifying a method and a device for checking a sensor device, in particular an acceleration sensor device, which permits a check that is as meaningful as possible.
  • the dynamics of the test output signal of the sensor device triggered by a test signal is checked.
  • This dynamic check allows statements to be made about errors in dynamic signal processing which are caused by fitting the sensor device with an incorrect component, by errors in the component itself or by changes in the sensor.
  • Claim 7 characterizes the basic structure of a device for solving the relevant part of the object of the invention.
  • the device according to the invention is further developed in an advantageous manner with the features of subclaims 9 and 10.
  • the invention can be applied to all types of sensor devices in which the dynamics, ie the time course with which the sensor device responds to an event to be sensed, plays a role.
  • This also includes sensor devices for non-mechanical giants, which respond, for example, to rapid changes in temperature, changes in light intensity, etc.
  • the invention is advantageously suitable for checking sensor devices with sensors for detecting rapidly changing mechanical variables, such as linear or angular accelerations.
  • This also includes rotation rate sensors, such as those used not only in occupant protection systems for rollover detection, but also in driving stability systems.
  • Fig. 1 is a block diagram of a system for checking an acceleration sensor device
  • Fig. 2 shows a detail of Fig. 1 in more detail
  • Fig. 3 waveforms to explain the operation of the system according to the invention.
  • an acceleration sensor device designated overall by 2 is connected to an electronic control device 4.
  • the acceleration sensor device 2 contains an acceleration sensor 6 and one downstream of the sensor 6
  • the electronic control unit 4 contains a microprocessor 10, a memory device 12, a comparison device 14 and a signal generator 16.
  • An output 18 of the control device 4 connected to the signal generator 16 is connected to a test circuit 19 of the acceleration sensor device 2.
  • An output 20 of the encumbrance sensor device 2, at which an output signal generated by the sensor 6 and processed in the signal processing unit 8 is present, is fed to an input 22 of the control device 4.
  • the sensor 6 contains an inertial mass 30 which is movable against the force of a spring 28 and on which a capacitor plate 32 lying on the ground is formed.
  • Two fixed capacitor plates 34 and 36 are arranged opposite the capacitor plate 32, the capacitor plate 34 being connected to the test port 19 and the capacitor plate 36 being connected to the signal processing unit 8. Applying voltage to the capacitor plate 19 acts on the inertial mass 30 like a gem.
  • Fig. 2 perpendicular acceleration.
  • the signal processing unit 8 contains an amplifier 38, which is followed by a resistor 40, which is connected to the output 20 and a capacitor 42.
  • the capacitor 42 forms a low-pass filter together with the resistor 40.
  • the signal processing unit 8 can be provided with a test circuit 19 shown in dashed lines, by which the signal processing unit 8 or its amplifier circuit can be acted upon directly with a test signal which bypasses the sensor 6 and which only checks the signal processing unit 8 allows.
  • the operation of the described device is explained with reference to FIG. 3.
  • the dashed rectangular curve represents a test signal P which can be generated by the signal generator 16.
  • the curve S represents a target test output signal with which an intact acceleration sensor device 2 responds to the test signal P.
  • Curves Ai and A 2 represent test output signals from faulty sensor devices.
  • the target test output signal S with which an intact acceleration sensor device 2 responds to a test signal P, is stored in the memory device 12 of the control device 4 in its chronological course, starting with the rising edge of the test signal P at time t 0 .
  • the signal generator 16 When the vehicle is started up, for example when the ignition is switched on, which is detected by an input 24 of the control unit 4, the signal generator 16 generates a test signal P.
  • the acceleration sensor device 2 responds with a test output signal which is fed to the control unit 4 via the input 22 and is compared in the comparison device 14 with the test output signal S stored in the memory device 12.
  • the comparison takes place within two time windows, a first time window ti to t 2 , in which the target test output signal S is essentially given by the connection of the signal processing device 8, for example with a low-pass filter, compared to the rising edge of the Test signal P is a time-delayed rise, and a time interval t 3 to t 4 , in which the target output signal S has essentially assumed its maximum value.
  • the acceleration sensor device is rated as OK.
  • the test output signal A 2 lies within the dynamic time window ti, t 2 , outside the tolerance box I, that is to say the rise or filter characteristic of the test output signal A 2 and thus its dynamic behavior lies outside the tolerance box I.
  • the control device 4 then generates an error signal at its output 26.
  • the test output signal Ai lies outside the tolerance ranges I and II both in the dynamic time window ti, t 2 and in the static time window t 3 , t 4.
  • the excessively high maximum value indicates a change in sensitivity of the sensor 6 itself or an error in one amplifier hm contained in the signal processing device 8.
  • the control device 4 also generates an error signal. It goes without saying that the error signals can differ depending on whether the unauthorized deviation lies in the dynamic window or in the static window.
  • the desired test output signal S does not necessarily have to be recorded, but can be calculated for different test signals P on the basis of the data from the sensor 6 and the wiring of the signal processing device 8.
  • the dynamic evaluation can take place in such a way that the test output signal is normalized to a predetermined maximum value.
  • the time window ti, t 2 is advantageously such that the target test output signal has a value of over 30% and less than 70% of its maximum value during the time window.
  • the evaluation of the test output signal can also be carried out in such a way that the circuit parameters are calculated from its rise behavior and compared with setpoints of the circuit parameters.
  • the dynamic evaluation or test does not have to be in the increasing range of the signals acc. Fig. 3 take place, but can be done in an analogous manner in their descending area.
  • the sensor 6 and the signal processing unit 8 can be integrated into one unit; the signal processing unit 8 can also be formed separately from the sensor 6.
  • the acceleration sensor 6 does not have to contain a capacitively operating inertial mass or otherwise detected with regard to its deflection; it can be designed, for example, as a piezoelectric sensor.
  • the control device 4 can be the control device of the occupant protection system and can have one or more further outputs 28 which control occupant protection means, for example an airbag.
  • test signals that are not square-wave signals can also be used to test the sensor device 2, corresponding to which ⁇ other desired test output signals result.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

Selon l'invention, afin de contrôler un dispositif de détection d'accélération, la courbe temporelle d'un signal de sortie de vérification (A1,A2) avec lequel le dispositif de détection d'accélération (2) répond à un signal d'essai (P) déposé sur son détecteur (6) est comparée à un signal de sortie d'essai (S) avec lequel le dispositif de détection d'accélération intact répond au signal d'essai. Une comparaison des écarts dynamiques entre le signal de sortie d'essai théorique et le signal de sortie d'essai et une comparaison de leurs valeurs maximales statistiques permettent d'identifier de manière fiable des erreurs intervenues dans le dispositif de détection d'accélération.
PCT/DE2001/000448 2000-02-18 2001-02-06 Procede et dispositif pour controler un dispositif de detection, notamment un dispositif de detection d'acceleration contenu dans un systeme de protection pour passagers de vehicules WO2001060663A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10007422A DE10007422C2 (de) 2000-02-18 2000-02-18 Verfahren und Vorrichtung zum Überprüfen einer Sensoreneinrichtung, insbesondere einer in einem Fahrzeuginsassen-Schutzsystem enthaltenen Beschleunigungssensoreinrichtung
DE10007422.7 2000-02-18

Publications (1)

Publication Number Publication Date
WO2001060663A1 true WO2001060663A1 (fr) 2001-08-23

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PCT/DE2001/000448 WO2001060663A1 (fr) 2000-02-18 2001-02-06 Procede et dispositif pour controler un dispositif de detection, notamment un dispositif de detection d'acceleration contenu dans un systeme de protection pour passagers de vehicules

Country Status (2)

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DE (1) DE10007422C2 (fr)
WO (1) WO2001060663A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6681196B2 (en) * 1999-12-16 2004-01-20 Siemens Aktiengesellschaft Method and device for determining the absolute angle of rotation of an object that is rotating about an approximately horizontal rotational axis
EP2163861A1 (fr) * 2008-09-12 2010-03-17 Siemens Aktiengesellschaft Appareil de mesure de processus
JP2013521484A (ja) * 2010-03-02 2013-06-10 タカタ アーゲー 電子機器のテスト方法及びデバイス

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10216460B4 (de) * 2002-04-12 2004-06-09 Ops Automation Ag Selbstüberwachender piezoelektrischer Sensor
DE10308652A1 (de) * 2003-02-27 2004-09-09 Siemens Ag Plausibilitätsüberprüfung eines elektrischen Beschleunigungssignals
JP2004268717A (ja) * 2003-03-07 2004-09-30 Calsonic Kansei Corp ロールオーバ検出器試験装置
DE10334235A1 (de) * 2003-07-28 2005-02-17 Robert Bosch Gmbh Aufprallsensor und Verfahren zum Testen eines Aufprallsensors
DE102006011138B4 (de) * 2006-01-16 2022-09-29 Continental Automotive Technologies GmbH Verfahren zur Funktionsprüfung einer Baugruppe
DE102008022808A1 (de) 2008-05-08 2009-11-12 Enerday Gmbh Brennstoffzellensystem für ein Fahrzeug
DE102009031182A1 (de) * 2009-06-29 2010-12-30 Brüel & Kjaer Vibro GmbH Verfahren und Vorrichtung zur Überwachung eines piezoelektrischen Sensorsystems
DE102011103248A1 (de) * 2011-06-03 2012-12-06 Volkswagen Aktiengesellschaft Sensoreinrichtung und Verfahren zur Überwachung einer Sensoreinrichtung

Citations (3)

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US4950914A (en) * 1987-03-30 1990-08-21 Honda Giken Kogyo Kabushiki Kaisha Collision detection system for a vehicle
DE4414952A1 (de) * 1993-04-28 1994-11-03 Hitachi Ltd Beschleunigungsmesser und Airbagsystem, das diesen verwendet
US5506454A (en) * 1991-03-20 1996-04-09 Hitachi, Ltd. System and method for diagnosing characteristics of acceleration sensor

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Publication number Priority date Publication date Assignee Title
AU7530994A (en) * 1993-08-24 1995-03-21 A/S Bruel & Kjaer An apparatus for detecting the malfunctioning of an accelerometer
DE19606826A1 (de) * 1996-02-23 1997-08-28 Knorr Bremse Electronic Gmbh Verfahren und Vorrichtung zur Überprüfung eines Sensors

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4950914A (en) * 1987-03-30 1990-08-21 Honda Giken Kogyo Kabushiki Kaisha Collision detection system for a vehicle
US5506454A (en) * 1991-03-20 1996-04-09 Hitachi, Ltd. System and method for diagnosing characteristics of acceleration sensor
DE4414952A1 (de) * 1993-04-28 1994-11-03 Hitachi Ltd Beschleunigungsmesser und Airbagsystem, das diesen verwendet

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6681196B2 (en) * 1999-12-16 2004-01-20 Siemens Aktiengesellschaft Method and device for determining the absolute angle of rotation of an object that is rotating about an approximately horizontal rotational axis
EP2163861A1 (fr) * 2008-09-12 2010-03-17 Siemens Aktiengesellschaft Appareil de mesure de processus
JP2013521484A (ja) * 2010-03-02 2013-06-10 タカタ アーゲー 電子機器のテスト方法及びデバイス
US9733298B2 (en) 2010-03-02 2017-08-15 Takata AG Method and device for testing an electronic appliance

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Publication number Publication date
DE10007422A1 (de) 2001-09-06
DE10007422C2 (de) 2001-12-06

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