EP1863678A2 - Device and method for differentiating between a person and an object on a vehicle seat - Google Patents
Device and method for differentiating between a person and an object on a vehicle seatInfo
- Publication number
- EP1863678A2 EP1863678A2 EP06725355A EP06725355A EP1863678A2 EP 1863678 A2 EP1863678 A2 EP 1863678A2 EP 06725355 A EP06725355 A EP 06725355A EP 06725355 A EP06725355 A EP 06725355A EP 1863678 A2 EP1863678 A2 EP 1863678A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- seat
- weight
- sensors
- vehicle
- signals
- 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- Withdrawn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
- 238000000034 method Methods 0.000 title claims description 32
- 238000011156 evaluation Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims description 9
- 230000004913 activation Effects 0.000 claims description 2
- 230000000452 restraining effect Effects 0.000 description 6
- 230000001960 triggered effect Effects 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 3
- 210000001217 buttock Anatomy 0.000 description 2
- 101100495256 Caenorhabditis elegans mat-3 gene Proteins 0.000 description 1
- 241001494479 Pecora Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 210000002414 leg Anatomy 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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
- B60R21/015—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 the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
- B60R21/01512—Passenger detection systems
- B60R21/01516—Passenger detection systems using force or pressure sensing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/002—Seats provided with an occupancy detection means mounted therein or thereon
-
- 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
- B60R21/015—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 the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
- B60R21/01556—Child-seat detection systems
Definitions
- the invention relates to an apparatus for discriminating whether a person is on the seat surface of a vehicle seat be ⁇ or an object having at least one substantially flat supporting surface which is disposed over a large part of the seating surface including a central area.
- the device comprises a vehicle seat, a seat mat with weight sensors distributed in a planar manner on the seat surface of the vehicle seat, and an evaluation unit to which the signals of the weight sensors are fed.
- occupancy by occupants is an important input. This especially applies sat restraint systems for in ⁇ whose efficient, ie injury to persons avoidant, use of occupant restraint means is often dependent on the seating position of the occupant.
- an occupant restraining means assigned to the respective vehicle seat generally has to be suppressed in the event of a vehicle accident if a child seat, in particular a rear-facing child seat facing the direction of travel, is recognized by the seat occupancy recognition.
- systems for detecting seat occupancy on a vehicle seat using only the sensor signals of a sensor seat mat can only poorly distinguish, for example, a child seat from a very light person, for example a so-called 5% woman, ie a woman who is lighter and smaller as 95% of a representative peer group is adopted by women.
- the airbag should normally be triggered.
- the release of particular airbag should be omitted, as this could injure a child in the child seat; ,
- transponders in a child seat and transmitting and receiving antennas in the vehicle seat on which the child seat has been mounted.
- the child seat can be clearly detected.
- Such an additional detection system for detecting an object on a vehicle seat makes an occupant protection system, however technically for expenditures ended, which is usually higher costs for an occupant protection system and the probability of default un ⁇ ter circumstances is increased.
- Object of the present invention is to provide a simple device and a simple method for distinguishing whether a person on the seat of a vehicle seat is ⁇ or finds an object with an at least largely flat support surface, in particular a child seat to sheep ⁇ fen.
- This object is achieved by an apparatus according to ⁇ demanding 1.
- This apparatus is for discriminating whether a person is on the seat surface of a vehicle seat or an object, in particular a child's seat, with Minim ⁇ least a substantially flat supporting surface which is arranged over a large part of the seating surface including a central area.
- the apparatus comprises a vehicle seat, a seating mat surface on the seat surface of the vehicle seat arranged distributed weight sensors and ei ⁇ ne evaluation unit to which the signals of the weight sensors are guided to ⁇ .
- the central area of the seating surface is concavely shaped in the direction of the vehicle floor, so that at least one first weight sensor arranged there is arranged closer to the vehicle floor than a plurality of second weight sensors arranged outside the central area in the area of the seating area covered by the object are.
- the invention utilizes the fact that the weight of a vehicle in ⁇ sat at normal sitting posture anotomie impart distributed quite differently applied to the seat surface than the weight of an article having a substantially flat support surface.
- a vehicle occupant usually places most of his weight in a central region of the seat over his buttocks on the vehicle seat;
- an object with a largely flat bearing surface can apply its weight evenly distributed over the flat bearing surface on the seat, especially if this seat is also largely flat.
- the curvature of the seat surface of the vehicle seat is designed such that less than 5%, preferably less, of the first weight sensor or the first weight sensors acting as 30% or even less than 50% of the weight load by the object, as on at least ⁇ a second weight sensor, which is completely covered by the object.
- the first weight sensor or the first weight sensors experience no weight load by such an object.
- the distinction of the signals of loaded second weight sensors is that of an unloaded first weight sensor or several unloaded first weight sensors particularly simple.
- the object is further achieved by a method according to claim 6 for distinguishing whether a person on the
- Seat of a vehicle seat is located or an object with at least a substantially flat support surface, which is arranged over a large part of the seat including a central region, which is the method of a device with a vehicle seat, a seat mat with flat on the seat of Vehicle seat distributed ⁇ assigned weight sensors and with an evaluation unit, which are fed to the signals of the weight sensors, uses.
- the following procedural steps take place: the signal of at least one first signal is transmitted
- Detected weight sensor which is arranged in the central region of the Wegflä ⁇ che; Furthermore, the signals of a plurality of second weight sensors are detected which are arranged in the region of the seat surface covered by the object but outside the central region; the signal or signals of the first or the first weight sensors are compared with the signals of the second weight sensors; Detecting the object when the signal of the first Ge ⁇ weight sensors or the signals of the first weight sensors, for example, individually or in total, less than 5% of the Sig ⁇ Nals at least one signal is of a second weight sensor, preferably less than 30%, in particular less than 50%.
- the comparison of the signals of the weight sensors can be carried out, for example, as a comparison of a first weight sensor with an average value of the signals of the second weight sensors.
- an average of the signals of the first weight sensors may also be used for the comparison.
- the signals of the first and second weight sensors can also be compared with each other individually, possibly also combined with a comparison of mean values. The recognition of the object takes place on the basis of the result from this comparison or these comparisons of the signals of the weight sensors.
- FIG. 1 shows a device according to the invention with a motor vehicle seat with a seat line and a seat surface in plan view
- FIG. 2 shows the motor vehicle seat from FIG. 1 in cross section with a child seat on its seat surface
- FIG. 3 shows a vehicle seat as in Figure 2, but with a person on the seat and
- FIG. 4 shows a method according to the invention.
- Figure 1 shows a an embodiment of a device according OF INVENTION ⁇ dung with a motor vehicle seat 1 including a seat back 11 and a seat 2 in plan view; thereon a seat mat 3 is arranged, the weight-sensitive Senso ⁇ ren S R, S M has, on each of which a sensor signal can be picked up by an evaluation unit 7, which informs Ü about the forces acting on the sensors S R and S M weight forces are.
- a bordered area provided with the reference symbol M represents a surface-centered area of the seat surface 2, in which area-centered weight sensors S M are arranged.
- the evaluation unit 7 is verbun ⁇ with a trip unit 8, which can cause the triggering of an occupant protection means 9 ⁇ example of a front airbag, if the Signa ⁇ le of (not shown) impact sensors, for example, acceleration or pressure sensors, are characteristic of a collision accident.
- a dashed square area 10 on the seat 2 represents the largely flat Auflageflä- Depending on the imple mentation of the child seat 4, the largely flat support surface does not necessarily occupy the entire closed surface 10.
- the flat surface 10 may be interrupted by a recess.
- FIG 2 shows the motor vehicle seat 1 of Figure 1 in cross section along the cross-sectional line AA.
- a child 5 is located on the seat 2 of the child seat 4 arranged, in which a child 5 is located.
- the seat In the central region M, the seat is concavely shaped concavely in the direction of the vehicle floor.
- the flat support surface 10 of the child seat 4 covers much more than the region M of the curved seat 2, so that the weight of the child seat only acts on those areas of the seat 2, which lie outside the arched area M.
- the weight of the child seat 4 and the child 5 is therefore detected only by weight sensors S R outside this central area M. Only these weight sensors S R therefore each provide a weight-dependent signal measurable by the evaluation unit 7.
- the sensors S M in the central region M are not acted on by the weight of the child seat 4 and of the child 5 or only very slightly in comparison to the majority of the weight sensors S R outside this central region M.
- Figure 3 shows a person 6 on the vehicle seat 1.
- the buttocks of the person 6 loads the central region M of the seat 2 of the vehicle seat 1 much more than the surrounding peripheral parts of the seat 2.
- Another part of the weight of the person 6 is usually the floor of the vehicle interior, since there are üb ⁇ Licher way the legs of the person; Furthermore, the seat back 11 takes on weight, since the person 6 übli ⁇ chally based on the seat back 11. Often, the armrests, the steering wheel, etc. take on a portion of the weight of the vehicle occupant, as this there preferably his arms off ⁇ lays or holds etc.
- FIG. 4 shows an exemplary embodiment of a method according to the invention.
- a weight value GWM is derived from these sensor signals, which is characteristic of the weight loading on the area-centered area M of the seat surface 2. For example, an average weighting of the sensor signals of the area-weighted weight sensors S M may be formed become.
- the value obtained is compared in GWM ei ⁇ nem further method step 800 with a threshold value TH.
- a second process step II the offset same time or for the first process stage I saufin ⁇ det, 400 ', the sensor signals of the second weight sensors S R outside the central area M of the seat 2 is determined in a method step and the sensor signals of the first weight sensors, if not already done in step 400.
- a value GWM derived from the signals of the first weight sensors which is characteristic of the weight load on the center of the area.
- a corresponding value GWR is determined from the signals of the second weight sensors S R , which is characteristic of the weight load outside the central region M of the seat 2.
- a next method step 800 the difference between the two values GWM and GWR is compared with a threshold value TH 1 .
- This difference exceeds the threshold value TH 1, wherein ⁇ game example by 5%, 30%, 50% or even more, so this is an indication that a person located on the seat 6 are 2 and could no object. If the value GWM also exceeds the threshold value TH, this is a further indication of a person 6 on the vehicle seat.
- these two instructions are logically linked to one another and as a result, in a further method step 1100 ⁇ , the presence of a person 6 on the Wegflä ⁇ che 2 detected.
- Step 1000 these two pieces of information are logically linked to one another and the presence of a nes child seat 4 on the seat 2 detected in a further step 1200.
- the Al ⁇ rithm of the evaluation unit also crash signals are supplied from suitable crash sensors, which can be evaluated by the algorithm. Based on this assessment, the information is in the evaluation of whether a clergysi ⁇ situation is present or not.
- the evaluation unit 17 separates in a further method step 1600 that no ignition of the airbag occurs.
- the evaluation unit 7 decides, in a further procedural ⁇ rens intimid 1700 that an air bag should be triggered.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Air Bags (AREA)
- Seats For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005014515A DE102005014515A1 (en) | 2005-03-30 | 2005-03-30 | Apparatus and method for distinguishing a person from an object on a vehicle seat |
PCT/EP2006/061091 WO2006103229A2 (en) | 2005-03-30 | 2006-03-28 | Device and method for differentiating between a person and an object on a vehicle seat |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1863678A2 true EP1863678A2 (en) | 2007-12-12 |
Family
ID=36930211
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06725355A Withdrawn EP1863678A2 (en) | 2005-03-30 | 2006-03-28 | Device and method for differentiating between a person and an object on a vehicle seat |
Country Status (5)
Country | Link |
---|---|
US (1) | US20080306659A1 (en) |
EP (1) | EP1863678A2 (en) |
JP (1) | JP2008534366A (en) |
DE (1) | DE102005014515A1 (en) |
WO (1) | WO2006103229A2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014202130A1 (en) * | 2014-02-06 | 2015-08-06 | Robert Bosch Gmbh | Device and method for detecting a non-effectively applied webbing and associated restraint system |
US9888756B2 (en) * | 2014-02-24 | 2018-02-13 | Nolo Holdings Llc | Item and luggage loss prevention system |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1318043B1 (en) * | 1999-01-27 | 2009-02-25 | The Furukawa Electric Co., Ltd. | Occupant detecting device |
DE10132110B4 (en) * | 2000-07-05 | 2011-06-30 | DENSO CORPORATION, Aichi-pref. | A method of calibrating the sensitivity of pressure sensing cells of a vehicle passenger seat |
DE10143326A1 (en) * | 2001-09-05 | 2003-03-27 | Bosch Gmbh Robert | Device for weight classification of persons, especially motor vehicle seat occupants has an array of seat pressure sensors that are joined into groups |
DE10239604A1 (en) * | 2002-04-19 | 2003-11-13 | Visual Analysis Ag | Seat occupation detection method for vehicle passenger seat identifying seated person or object for corresponding control of airbag device |
US7402769B2 (en) * | 2004-10-27 | 2008-07-22 | Lear Corporation | Vehicle occupant sensing system having a retention member for a biasing member |
DE502004003237D1 (en) * | 2004-11-25 | 2007-04-26 | Delphi Tech Inc | Device and method for detecting the occupancy of a seat |
DE102005014526A1 (en) * | 2005-03-30 | 2006-10-05 | Siemens Ag | Apparatus and method for distinguishing a person from an object on a vehicle seat |
US7519461B2 (en) * | 2005-11-02 | 2009-04-14 | Lear Corporation | Discriminate input system for decision algorithm |
-
2005
- 2005-03-30 DE DE102005014515A patent/DE102005014515A1/en not_active Ceased
-
2006
- 2006-03-28 WO PCT/EP2006/061091 patent/WO2006103229A2/en active Application Filing
- 2006-03-28 JP JP2008503498A patent/JP2008534366A/en not_active Withdrawn
- 2006-03-28 US US11/910,284 patent/US20080306659A1/en not_active Abandoned
- 2006-03-28 EP EP06725355A patent/EP1863678A2/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2006103229A2 * |
Also Published As
Publication number | Publication date |
---|---|
US20080306659A1 (en) | 2008-12-11 |
WO2006103229A3 (en) | 2006-12-21 |
WO2006103229A2 (en) | 2006-10-05 |
DE102005014515A1 (en) | 2006-10-05 |
JP2008534366A (en) | 2008-08-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20070906 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): FR LU |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: GEYER, MANFRED Inventor name: WINKLER, GERD |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: WINKLER, GERD Inventor name: GEYER, MANFRED |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: VDO AUTOMOTIVE AG |
|
RBV | Designated contracting states (corrected) |
Designated state(s): FR LU |
|
DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: CONTINENTAL AUTOMOTIVE GMBH |
|
17Q | First examination report despatched |
Effective date: 20111027 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20120307 |