EP1791730A1 - Einrichtung zur erfassung einer kollision eines fahrzeug mit einem hindernis - Google Patents
Einrichtung zur erfassung einer kollision eines fahrzeug mit einem hindernisInfo
- Publication number
- EP1791730A1 EP1791730A1 EP05801366A EP05801366A EP1791730A1 EP 1791730 A1 EP1791730 A1 EP 1791730A1 EP 05801366 A EP05801366 A EP 05801366A EP 05801366 A EP05801366 A EP 05801366A EP 1791730 A1 EP1791730 A1 EP 1791730A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vehicle
- collision
- obstacle
- signal
- receiving unit
- 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- Withdrawn
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
- B60R21/0136—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 actual contact with an obstacle, e.g. to vehicle deformation, bumper displacement or bumper velocity relative to the vehicle
Definitions
- the invention relates to collision detection device for a vehicle according to the preamble of the main claim. It is already known to use ultrasonic sensors for distance measurement in vehicles.
- the ultrasonic sensors are preferably designed as transmitting and receiving units for ultrasonic signals.
- An ultrasonic signal is emitted by the ultrasonic transmitting and receiving unit and reflected by an obstacle in the vicinity of the vehicle.
- the reflected signal is resumed by the ultrasound transmitting and receiving unit.
- a distance of the obstacle to the ultrasonic sensor is determined.
- a warning device is operated which warns a driver of the vehicle from approaching obstacles too close.
- the ultrasound transmitting and receiving unit has an oscillatable diaphragm on which a piezoelectric element is arranged.
- the piezoelectric element is used in a first mode to stimulate the membrane to vibrate and thus the emission of ultrasonic signals. Furthermore, vibrations picked up by the diaphragm are also transmitted to the piezoelectric element, so that the oscillations cause a voltage corresponding to the oscillations to be tapped, amplified and evaluated at the piezoelectric element in order to determine the propagation time of the reflected signal and from there to the distance value receive.
- the resulting delay can be detected via the acceleration sensor.
- restraint devices may be deployed in the vehicle, e.g. a belt tensioner or an airbag.
- the device according to the invention for detecting a collision of a vehicle with an obstacle has the advantage that an ultrasonic receiving unit is used for detecting a collision with an obstacle.
- the receiving unit of the membrane is used to detect sound that is generated by a collision of the vehicle with an obstacle. If the vehicle collides with the obstacle, the body or body parts are deformed by this collision. This deformation generates sound that propagates through the air and especially through the vehicle. These sound waves also reach the ultrasonic receiving unit.
- the membrane of the ultrasonic receiving unit is generally designed to a certain ultrasonic frequency preferred, however, strong vibrations in this frequency range are triggered by a deformation caused by the collision.
- the ultrasonic sensor can detect the actual occurrence of a collision in an evaluation of these sound signals.
- the sound signals generated thereby can be detected, so that not first a high acceleration must occur in the vehicle, in which, for example, an acceleration sensor can only detect the occurrence of a collision.
- measured values of the acceleration sensor can be made plausible by the collision detection by means of the ultrasonic receiving unit. If e.g. only very strongly braked and there is no collision, e.g. the airbag does not trigger. On the other hand, the triggering process can be accelerated if there is actually a collision. As a result, the driving safety can be increased by an early detection of a collision with an obstacle, in particular with another vehicle.
- the measures listed in the dependent claims advantageous refinements and improvements of the main claim means for detecting a collision of a vehicle with an obstacle are possible.
- the ultrasonic receiving unit is thus as close as possible to the place where the sound produced in a collision is generated.
- the amplitude and / or duration of the generated sound signal can be used to determine information about the severity of a collision. This may be e.g. avoid unnecessary triggering of the airbag in smaller collisions.
- the ultrasound receiving unit so that it can generally also be used to determine the distances to obstacles in the surroundings of the vehicle in a known manner.
- this eliminates the need to install additional receiver units, on the other hand, an additional function for an ultrasonic distance measuring unit in the vehicle is possible, which can further increase driving safety.
- Figure 1 shows an inventive device for detecting a collision of a
- FIG. 2 shows an exemplary measurement signal for a distance measurement and for an inventive detection of a sound signal in the event of a collision.
- FIG. 3 shows an implementation of a method according to the invention for
- FIG. 1 shows the front region of a motor vehicle 1.
- Ultrasonic sensors 3 are arranged on the vehicle front side 2. Also on the left and the right side of the vehicle ultrasonic sensors 4 are arranged.
- the ultrasonic sensors 3, 4 are designed as ultrasonic transmitting and receiving units. For the operation of the collision detection device according to the invention, however, ultrasonic sensors which only operate as ultrasonic receiving units are sufficient.
- the ultrasonic sensors 3, 4 are preferably arranged in a bumper of the vehicle. Alternatively, the laterally arranged ultrasonic sensors 4 may also be mounted in a side region of the vehicle body.
- the ultrasonic sensors 3, 4 are connected to an evaluation unit 5 via a data bus 6.
- sound signals are transmitted directly to the evaluation unit 5 by the ultrasonic sensors 3, 4.
- the received sound signals can also be evaluated directly in the ultrasonic sensors to what extent there is a distance to an obstacle or if there is a collision.
- a result signal is transmitted to the evaluation unit 5 for further evaluation.
- a binarized sound signal is transmitted. This binarized sound signal is obtained by setting the binarized evaluation signal to the value 1 when a predetermined amplitude value is exceeded. If the detected amplitude amount is below this value, the signal is set to the value 0.
- the binarized evaluation signal is then further processed by the evaluation unit.
- the evaluation unit 5 in the embodiment described here on a first processing unit 7 for distance determination.
- the evaluation unit has at least one evaluation unit for collision determination.
- the evaluation units 7, 8 are combined in an evaluation unit 5. However, they can also be arranged separately in the vehicle.
- the evaluation unit 5 is connected in a first embodiment with output units for driver warning.
- a display 9 which warns the driver of a collision with obstacles.
- a warning symbol is preferably displayed when the vehicle is too close to an obstacle.
- a current distance value can also be represented numerically or symbolically.
- the evaluation unit 5 is connected to a loudspeaker 10 which emits beeps as a function of the distance of the vehicle to an obstacle.
- an output of warnings via the output unit 9, 10 in general no longer makes sense, since the driver can no longer respond.
- a collision is detected by the evaluation unit 5
- corresponding information is transmitted via a second data bus 11, e.g. a CAN bus, transferred to restraints in the vehicle.
- a second data bus e.g. a CAN bus
- an air bag 12 and / or a belt tensioner 13 is connected to the data bus.
- further retaining means may be connected to the data bus. This can e.g. be further airbag units in the vehicle, e.g. a side airbag.
- FIG. 2 An inventive mode of operation of the collision warning device according to FIG. 1 will be explained with reference to FIG.
- a time characteristic of a sound signal received by an ultrasonic receiving unit is plotted over time.
- a binarized evaluation signal generated by the ultrasonic receiving unit as a function of this received sound signal is likewise shown over time.
- the ultrasound receiving unit receives only jamming signals, e.g. be generated by the driving movement of the vehicle.
- the binarized evaluation signal is at the value 0.
- the ultrasonic sensor emits a signal.
- the membrane is excited to vibrate.
- the binarized evaluation signal is set to the value 1 here.
- the third time interval 24 corresponds to the time that the sound signal takes to be reflected by the obstacle.
- the fourth time interval 25 the reflected sound signal whose amplitude is significantly lower than that of the emitted sound signal is finally received. This is due to the fact that the emitted sound signal is attenuated during the reflection process.
- the ultrasonic sensor is operated without a signal being emitted.
- a collision occurs. Due to the deformation of the body, a sound signal is generated with a random pattern in which a binarized Evaluation signal is generated in a stochastic signal sequence without a signal has been sent out. In contrast to the regular patterns or to individual, rarely occurring misdetections of the ultrasonic signal can be concluded from the stochastic pattern of the received sound signal to a collision.
- FIG. 3 shows a collision detection method according to the invention.
- the receiving unit is operated by being checked at regular intervals by the evaluation unit 5 in a first test step 31, whether a binarized evaluation signal of one of the ultrasonic receiving units has been set to the value 1. If this is not the case, then branching back to the measuring step 30 to repeat a query. If an evaluation signal is measured, it is checked in a second test step 32 whether a transmission signal was previously transmitted for which no echo has yet been received. If this is the case, a branch evaluation step 33 is branched, in which the distance is determined from the transit time of the transmitted, reflected signal.
- a warning corresponding to the distance that is to say preferably an optical and / or acoustic signal, is output to the driver.
- branching back to the measuring step 30 takes place.
- a branch is made to a third test step.
- the third test step 34 it is checked whether the detected signal is a single interference signal, ie a possible misdetection. If no further sound signals arrive within a predetermined period of time, for example one millisecond, then this is probably a false signal and branching back to the measuring step 30 takes place. However, if more signals with varying width and with varying time intervals, so there is probably a collision.
- a collision warning step 35 a corresponding collision warning is forwarded to a drive unit of restraint devices in the vehicle.
- the retaining devices can thus be switched at least into an alarm state.
- Other collision detection devices can be made plausible with regard to a possible collision detected by them.
- a retention device in the vehicle can also be triggered directly.
- any other devices such as an automatic emergency transmitter, a brake booster, an automatic door unlocking or a device for capping the gasoline supply, automatically take into account the received signal and exercise the function provided in the event of a collision.
- the evaluation unit selects the received binarized evaluation signals in such a way that it determines the severity of a collision on the basis of the duration of individual signals and the duration of the signal transmission.
- a collision is the more difficult, the more signals are received and the longer the signals persist, since in this case, the deformation of the body is heavier and thus a more intense sound signal is generated.
- the evaluation unit 5 can also determine the severity of a collision and transmit corresponding information about the severity of the collision to the restraint device in the vehicle.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Air Bags (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004043597A DE102004043597A1 (de) | 2004-09-06 | 2004-09-06 | Einrichtung zur Erfassung einer Kollision eines Fahrzeugs mit einem Hindernis |
PCT/EP2005/053731 WO2006027293A1 (de) | 2004-09-06 | 2005-08-01 | Einrichtung zur erfassung einer kollision eines fahrzeug mit einem hindernis |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1791730A1 true EP1791730A1 (de) | 2007-06-06 |
Family
ID=35469471
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05801366A Withdrawn EP1791730A1 (de) | 2004-09-06 | 2005-08-01 | Einrichtung zur erfassung einer kollision eines fahrzeug mit einem hindernis |
Country Status (5)
Country | Link |
---|---|
US (1) | US7958962B2 (de) |
EP (1) | EP1791730A1 (de) |
CN (1) | CN101010223B (de) |
DE (1) | DE102004043597A1 (de) |
WO (1) | WO2006027293A1 (de) |
Families Citing this family (21)
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DE102006030847B3 (de) * | 2006-07-04 | 2007-10-04 | Siemens Ag | Verfahren und Vorrichtung zum Erkennen eines Aufpralls eines Objekts auf ein Kraftfahrzeug und Kraftfahrzeug |
DE102007002737A1 (de) | 2007-01-18 | 2008-07-24 | Robert Bosch Gmbh | Verfahren zur Plausibilisierung eines Unfallereignisses in Fahrzeugen |
DE102007046982B3 (de) * | 2007-10-01 | 2009-03-05 | Fendt, Günter | Einrichtung zur Erfassung einer Unfallsituation und Verfahren zum Erkennen einer Unfallsituation und/oder zum Steuern eines Personschutzsystems |
JP2010071881A (ja) * | 2008-09-19 | 2010-04-02 | Denso Corp | 障害物検知システム |
JP5518655B2 (ja) * | 2010-09-17 | 2014-06-11 | 株式会社ケーヒン | 車両衝突判定装置 |
EP2484567B1 (de) * | 2011-02-08 | 2017-12-27 | Volvo Car Corporation | Borderkennungssystem |
EP2562053B1 (de) * | 2011-08-25 | 2016-04-27 | Volvo Car Corporation | Verfahren, Computerprogrammprodukt und System zum Feststellen, ob es notwendig ist, eine Fahrzeugsicherheitsausrüstung zu verwenden, und diese umfassendes Fahrzeug |
DE102012215350A1 (de) * | 2012-08-29 | 2014-03-06 | Continental Automotive Gmbh | Multisensuelle Aufmerksamkeitslenkung |
KR101428237B1 (ko) * | 2012-12-04 | 2014-08-08 | 현대자동차주식회사 | 외장에어백 전개방법 |
KR101526668B1 (ko) * | 2013-06-10 | 2015-06-05 | 현대자동차주식회사 | 차량의 접촉사고 감지 장치 및 그 방법 |
US11167755B2 (en) | 2015-02-07 | 2021-11-09 | Hella Kgaa Hueck & Co. | Method for at least partially automatically controlling a motor vehicle |
DE102015001638A1 (de) * | 2015-02-07 | 2016-08-11 | Hella Kgaa Hueck & Co. | Verfahren zum zumindest teilweise selbstständigen Steuern eines Kraftfahrzeuges |
DE102015213576A1 (de) * | 2015-05-11 | 2016-11-17 | Robert Bosch Gmbh | Verfahren zur Ansteuerung von Rückhaltemitteln für ein Fahrzeug, Computerprogramm, elektronisches Speichermedium und Vorrichtung Ansteuerung von Rückhaltemitteln für ein Fahrzeug |
GB2562662A (en) * | 2015-12-30 | 2018-11-21 | Thmgrp | Multipurpose event detection sensor and payload alert system |
DE102016202037B4 (de) * | 2016-02-11 | 2023-02-23 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Ultraschallsensors und Einrichtung zur Erkennung eines Crashfalls |
CN110696716A (zh) * | 2018-07-09 | 2020-01-17 | 上海擎感智能科技有限公司 | 车辆报警方法、车辆报警系统、车载终端、及车辆 |
CN113246893A (zh) * | 2020-02-13 | 2021-08-13 | 宁波吉利汽车研究开发有限公司 | 一种车辆碰撞处理方法及系统 |
CN113246894B (zh) * | 2020-02-13 | 2022-11-22 | 宁波吉利汽车研究开发有限公司 | 一种车辆碰撞检测方法及装置 |
CN112277936B (zh) * | 2020-10-10 | 2021-08-06 | 广州亚美智造科技有限公司 | 车辆碰撞检测处理方法、装置、车载终端和存储介质 |
CN114670769A (zh) * | 2020-12-24 | 2022-06-28 | 宝能汽车集团有限公司 | 车辆及其碰撞事件识别方法、装置和存储介质 |
CN113479239A (zh) * | 2021-06-24 | 2021-10-08 | 中车株洲电力机车有限公司 | 一种轨道车辆及其障碍物检测方法与系统 |
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DE19742606B4 (de) | 1997-09-26 | 2005-09-15 | Volkswagen Ag | Verfahren und Einrichtung zur Aktivierung von Insassenschutzsystemen in Kraftfahrzeugen |
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US7278657B1 (en) * | 2000-02-01 | 2007-10-09 | Trw Automotive U.S. Llc | Method and apparatus for controlling an actuatable occupant protection device using an ultrasonic sensor |
US6810313B2 (en) * | 2001-07-02 | 2004-10-26 | Trw Inc. | Combined occupant characteristic and acoustic crash sensor arrangement |
DE10140119C1 (de) * | 2001-08-16 | 2003-03-20 | Bosch Gmbh Robert | Vorrichtung zur Aufprallerkennung in einem Fahrzeug |
DE10206351B4 (de) | 2002-02-14 | 2004-08-05 | Daimlerchrysler Ag | Verfahren und Vorrichtung zum Personen- und Kollisionsschutz an einem Fahrzeug |
DE10227061A1 (de) * | 2002-06-18 | 2004-01-08 | Robert Bosch Gmbh | Rückhaltesystem |
US7231803B2 (en) * | 2004-06-11 | 2007-06-19 | Robert Bosch Gmbh | Hybrid impact sensor |
JP4534856B2 (ja) * | 2005-04-27 | 2010-09-01 | 株式会社デンソー | サイドドア衝突検出システム |
JP2007127537A (ja) * | 2005-11-04 | 2007-05-24 | Denso Corp | 車両用衝突検知システム |
US7675820B2 (en) * | 2007-04-17 | 2010-03-09 | Delphi Technologies, Inc. | Method of characterizing a vehicle crash event based on shear waves in the vehicle frame |
-
2004
- 2004-09-06 DE DE102004043597A patent/DE102004043597A1/de not_active Withdrawn
-
2005
- 2005-08-01 CN CN200580029681.3A patent/CN101010223B/zh not_active Expired - Fee Related
- 2005-08-01 EP EP05801366A patent/EP1791730A1/de not_active Withdrawn
- 2005-08-01 US US11/661,718 patent/US7958962B2/en not_active Expired - Fee Related
- 2005-08-01 WO PCT/EP2005/053731 patent/WO2006027293A1/de active Application Filing
Non-Patent Citations (1)
Title |
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See references of WO2006027293A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20090188742A1 (en) | 2009-07-30 |
WO2006027293A1 (de) | 2006-03-16 |
CN101010223B (zh) | 2013-01-09 |
US7958962B2 (en) | 2011-06-14 |
CN101010223A (zh) | 2007-08-01 |
DE102004043597A1 (de) | 2006-03-09 |
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