WO2009010026A1 - Control system and method for controlling at least one component of an occupant protection system of a motor vehicle - Google Patents
Control system and method for controlling at least one component of an occupant protection system of a motor vehicle Download PDFInfo
- Publication number
- WO2009010026A1 WO2009010026A1 PCT/DE2008/000668 DE2008000668W WO2009010026A1 WO 2009010026 A1 WO2009010026 A1 WO 2009010026A1 DE 2008000668 W DE2008000668 W DE 2008000668W WO 2009010026 A1 WO2009010026 A1 WO 2009010026A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sensor signal
- component
- filter
- bandpass
- motor vehicle
- Prior art date
Links
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
- 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
- B60R21/01332—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 by frequency or waveform analysis
- B60R21/01336—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 by frequency or waveform analysis using filtering
-
- 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
-
- 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
- B60R2021/01129—Problems or faults
- B60R2021/0117—Noise
-
- 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
- B60R2021/01302—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 monitoring vehicle body vibrations or noise
Definitions
- the present invention relates to a control system according to claim 1 and a method for controlling at least one component of an occupant protection system of a motor vehicle according to claim 8.
- 03/003022 A1 discloses a housing realization in which the frequency-selective forwarding of the useful frequency components to the acceleration sensors in the housing is made possible, while at the same time the Forwarding of Störfrequenzanmaschine is attenuated.
- the disadvantage of this implementation is the correspondingly complex production process as well as the production method deviating from known plastic production methods according to the prior art.
- a filter device which filters resonant vibrations of the vehicle structure, in particular at an installation location of a sensor of the safety system.
- the filter device may be a bandpass filter and / or a bandstop filter.
- control system having the features of claim 1 and a method for controlling at least one component of an occupant protection system of a motor vehicle having the features of claim 8. Further embodiments of the invention are the subject of the dependent claims.
- interference frequency components can not only be suppressed by a special housing shape, but that the interference frequency components can also be suppressed by bandpass filtering of the recorded acceleration signals, in particular adapted specifically to the interference signatures.
- the invention offers the advantage that now a simpler producible housing form for encapsulation the acceleration sensors can be used, but at the same time also the Störfrequenzanmaschine can be reliably suppressed.
- a variation of the filtering behavior by different design of a bandpass filter used to suppress interference can be done. This allows a significantly simplified production, since standard components can be used.
- the bandpass filter has a filter characteristic by which a frequency range of the sensor signal at a working frequency of a component of a
- Vehicle stabilization system is attenuated, wherein the operating frequency of the component of the driving stabilization system is defined by activating and deactivating this component. This allows especially the strong knocking sounds of ABS controls or ESP (Electronic Stability Program) control valves as components of the
- Controlling at least one component of an occupant protection system of a motor vehicle comprising: an acceleration sensor, which is designed to detect accelerations and / or vibrations of the motor vehicle and to output a corresponding sensor signal; a bandpass filter connected to the acceleration sensor and configured to band pass the sensor signal and thereby attenuate a defined frequency range of the sensor signal; and an evaluation unit connected to the bandpass filter and configured to activate the at least one component of the occupant protection system in response to the bandpass filtered sensor signal.
- the bandpass filter has a filter characteristic by which a frequency range of the sensor signal at a working frequency of a component of a driving stabilization system is attenuated, wherein the operating frequency of the component of the driving stabilization system is defined by activating and deactivating this component.
- Bandpass filter include a variable filter characteristic. This offers the advantage that the band-pass filter can be flexibly adjusted to specific (depending on the environmental situation) interference signatures.
- the bandpass filter may be a digital filter, wherein the evaluation unit is further configured to determine the filter coefficients of the bandpass filter and to transmit these into the bandpass filter.
- the evaluation unit is further configured to determine the filter coefficients of the bandpass filter and to transmit these into the bandpass filter.
- the evaluation unit is designed to activate the component of the driving stabilization system with a first operating frequency and a second operating frequency different from the first operating frequency, wherein the evaluation unit is further configured to determine the filter characteristic such that the frequency components the sensor signal caused by the activation and deactivation of the component of the driving stabilization system with the first and / or second operating frequency.
- the evaluation unit may comprise a vibration sensor configured to detect vibrations of the motor of the motor vehicle during operation, to determine filter coefficients of the bandpass filter in response to a signal supplied by the vibration sensor and to transmit them to the bandpass filter the bandpass filter is adapted to attenuate frequency ranges of the sensor signal caused by vibrations in operation of the motor of the motor vehicle based on the transmitted filter coefficients.
- control system further comprises a second acceleration sensor, which is designed to detect accelerations and / or vibrations of the motor vehicle and to output a corresponding second sensor signal, wherein the second acceleration sensor is mounted on a side of the motor vehicle the side opposite to which the first acceleration sensor is attached; a second bandpass filter connected to the second acceleration sensor and configured to bandpass the second sensor signal and thereby attenuate a defined frequency range of the second sensor signal, wherein a
- Filter characteristic of the bandpass filter is equal to a filter characteristic of the second bandpass filter; wherein the evaluation unit is connected to the bandpass filter and the second bandpass filter and adapted to activate the at least one component of the occupant protection system in response to the bandpass filtered sensor signal and the bandpass filtered second sensor signal when the bandpass filtered sensor signal and the bandpass filtered sensor signal
- Bandpass filtered second sensor signal in a frequency range outside the frequency range to be attenuated by the first or second bandpass filter is above a predefined threshold value.
- the evaluation unit not only evaluates the (bandpass-filtered) signal of a single acceleration sensor, but takes into account two such filtered signals. The fact that the two acceleration sensors are arranged offset from one another, the influence of the Störsignatur is relativized and the signal components outside of the filtered out frequency range of the bandpass-filtered sensor signals receive a higher weight.
- the evaluation unit is configured not to activate the occupant protection system component when either the bandpass filtered sensor signal or the bandpass filtered second sensor signal is in a frequency range to be damped by the first or second bandpass filter. is above a predetermined threshold.
- the present invention relates to a method for controlling at least one
- Component of an occupant protection system of a motor vehicle comprising the following steps:
- Bandpass filtering the sensor signal by means of a bandpass filter connected to the acceleration sensor to thereby attenuate a defined frequency range of the sensor signal; and responsive to the bandpass-filtered sensor signal, activating the at least one component of the occupant protection system by means of an evaluation unit connected to the band-pass filter.
- the bandpass filter has a filter characteristic by which a frequency range of the sensor signal at a working frequency of a component of a driving stabilization system is attenuated, wherein the operating frequency of the component of the driving stabilization system is defined by activating and deactivating this component.
- the present invention relates to a computer program for carrying out the above-mentioned method when the computer program is executed on a computer.
- the step of bandpass filtering (for example, by a digital filter) and the step of activating the component of the occupant protection system by the evaluation unit may be carried out by means of a computer.
- FIG. 1 is a block diagram representation of an embodiment of the control system according to the invention.
- Figure 2 is a flow diagram of an embodiment of the method according to the invention.
- a motor vehicle 10 for example a passenger car, comprises a first acceleration sensor 121 and a second acceleration sensor 122.
- the first acceleration sensor 121 is connected to a first bandpass filter 141 (for transmitting a first bandpass filtered sensor signal 151) is connected to the evaluation unit 16.
- the second acceleration sensor 122 is connected (for transmission of a second sensor signal 132) to a second bandpass filter 142, which is also connected to the evaluation unit 16 (for the purpose of transmitting a second bandpass filtered sensor signal 152).
- the first and second acceleration sensors 121 and 122 may be, for example, crash sensors for detecting an impact of the motor vehicle 10 on an obstacle.
- the evaluation unit 16 for example a central processing unit of the motor vehicle 10, is further configured to activate respective occupant protection system components 181 and 182 (eg, an air bag or rollover system) responsive to the signals provided by the acceleration sensors 121 and 122 and the signals filtered by the band pass filters 141 and 142, respectively.
- occupant protection system components 181 and 182 eg, an air bag or rollover system
- these components 181, 182 are shown only as lateral components, but they can also be arranged at any other locations of the motor vehicle 10.
- the motor vehicle 10 also includes components of a driving stabilization system 201, 202, 203 and 204, which are for example an ABS regulator or a component of an ESP system. These components 201, 202, 203 and 204 can also be controlled by the central unit 16, for example. If these components 201, 202, 203 and 204 are activated, this leads to a typical stutter noise, which as strong vibrations and thus interference signature by the central unit 16, for example. If these components 201, 202, 203 and 204 are activated, this leads to a typical stutter noise, which as strong vibrations and thus interference signature by the
- Acceleration sensors 121 and 122 is detected. If now the first and second bandpass filters 141 and 142 are adjusted such that the interference signature of the activation of the components of the driving stabilization system is damped or suppressed, the evaluation unit 16 can be set much more sensitive for the detection of crash-relevant acceleration signals. In particular, if different activation frequencies of the ABS control valves 201 to 204 are predetermined by the evaluation unit (or central unit) 16 depending on the driving speed of the motor vehicle 10, a favorable readjustment of the (for example digital) bandpass filters 141 or 142 to different
- Damping filter characteristics are performed. This can be done, for example, by determining the new filter coefficients in the central unit 16 and transmitting them to the bandpass filters 141 and 142, respectively.
- the algorithms known to those skilled in the art of digital signal processing can be used.
- a vibration sensor in the region of the engine of the motor vehicle 10 can be provided, which receives vibrations of the engine during its operation. Especially in diesel engines, this makes sense, therefore, this class of engines over other engines produces higher knocking noise and thus stronger Störsignaturen.
- the signals of these vibration sensors may then be taken into account in the evaluation of the acceleration sensor signals or taken into account in the readjustment of the bandpass filter coefficients such that the vibrations caused by the operation of the engine are damped or suppressed.
- bandpass filters 141 and 142 can be arranged at any desired position between the first acceleration sensor 121 and the evaluation unit 16 or the second acceleration sensor 122 and the evaluation unit 16.
- the first bandpass filter 141 may also be integrated into the first acceleration sensor 121, but may also be integrated into the evaluation unit 16.
- the second bandpass filter 142 can also be interpreted as a bandstop filter, which should attenuate or suppress the correspondingly to be filtered out Störsignatur.
- analog bandpass filters can also be considered, since these require less implementation effort.
- the present invention also includes a method for controlling at least one component of an occupant protection system a motor vehicle, as shown in Fig. 2 in the form of a schematic flow diagram.
- the method comprises a first step of detecting 50 accelerations and / or vibrations of the motor vehicle 10 by means of an acceleration sensor 121 or 122 and outputting a corresponding sensor signal 131 or 132.
- a bandpass filtering 52 of the sensor signal 131 or 132 by means of a bandpass filter 141 or 142 connected to the acceleration sensor 121 or 122, in order to attenuate thereby a defined frequency range of the sensor signal 131 or 132.
- an activation 54 of the at least one component 181 or 182 of the occupant protection system takes place by means of the evaluation unit 16 which is connected to the bandpass filter 141 or 142.
- the invention relates in particular to a method for suppressing unwanted or unwanted ABS / ESP interference signatures, which could disturb the function of the algorithm for an occupant protection system (airbag, rollover system).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112008002663T DE112008002663A5 (en) | 2007-07-19 | 2008-04-15 | A control system and method for controlling at least one component of an occupant protection system of a motor vehicle |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007033639A DE102007033639A1 (en) | 2007-07-19 | 2007-07-19 | A control system and method for controlling at least one component of an occupant protection system of a motor vehicle |
DE102007033639.1 | 2007-07-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009010026A1 true WO2009010026A1 (en) | 2009-01-22 |
Family
ID=39760997
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2008/000668 WO2009010026A1 (en) | 2007-07-19 | 2008-04-15 | Control system and method for controlling at least one component of an occupant protection system of a motor vehicle |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE102007033639A1 (en) |
WO (1) | WO2009010026A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201317257D0 (en) * | 2013-09-28 | 2013-11-13 | Quartix Ltd | Low-impact crash detection system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005018084A1 (en) * | 2005-04-19 | 2006-10-26 | Robert Bosch Gmbh | Safety system, for vehicle passengers, has filter device for filtering output signal of sensor, and control device for processing output signal of sensor, where output signal represents resonance vibrations of vehicle structure |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2990381B2 (en) * | 1991-01-29 | 1999-12-13 | 本田技研工業株式会社 | Collision judgment circuit |
DE10131424A1 (en) | 2001-06-29 | 2003-01-09 | Conti Temic Microelectronic | Housing for an electrical assembly with an acceleration sensor |
DE10309227B4 (en) * | 2003-03-03 | 2006-05-11 | Siemens Ag | Method and device for detecting an impact |
DE10351146B4 (en) * | 2003-11-03 | 2007-05-10 | Bayerische Motoren Werke Ag | Fastening device for an acceleration-dependent sensor assembly in motor vehicles |
DE102004021648B4 (en) * | 2004-05-03 | 2016-06-30 | Bayerische Motoren Werke Aktiengesellschaft | Method and device for interference correction of an acceleration-dependent sensor signal |
DE102005026188A1 (en) * | 2005-06-06 | 2006-12-07 | Daimlerchrysler Ag | Control method for an accident prevention device in a vehicle |
-
2007
- 2007-07-19 DE DE102007033639A patent/DE102007033639A1/en not_active Withdrawn
-
2008
- 2008-04-15 DE DE112008002663T patent/DE112008002663A5/en not_active Withdrawn
- 2008-04-15 WO PCT/DE2008/000668 patent/WO2009010026A1/en active Application Filing
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005018084A1 (en) * | 2005-04-19 | 2006-10-26 | Robert Bosch Gmbh | Safety system, for vehicle passengers, has filter device for filtering output signal of sensor, and control device for processing output signal of sensor, where output signal represents resonance vibrations of vehicle structure |
Also Published As
Publication number | Publication date |
---|---|
DE102007033639A1 (en) | 2009-01-22 |
DE112008002663A5 (en) | 2010-07-01 |
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