WO1998025112A2 - Seat occupant sensing system - Google Patents
Seat occupant sensing system Download PDFInfo
- Publication number
- WO1998025112A2 WO1998025112A2 PCT/US1997/017327 US9717327W WO9825112A2 WO 1998025112 A2 WO1998025112 A2 WO 1998025112A2 US 9717327 W US9717327 W US 9717327W WO 9825112 A2 WO9825112 A2 WO 9825112A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- variable resistance
- resistance force
- seat
- force sensor
- sensing system
- Prior art date
Links
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims description 27
- 239000000126 substance Substances 0.000 claims description 10
- 239000007769 metal material Substances 0.000 claims description 8
- 230000004913 activation Effects 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 9
- 230000036316 preload Effects 0.000 description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 5
- 239000000976 ink Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- QXDDUAGHAWNZHJ-UHFFFAOYSA-N [C].[Mo](=S)=S Chemical compound [C].[Mo](=S)=S QXDDUAGHAWNZHJ-UHFFFAOYSA-N 0.000 description 1
- 229920005822 acrylic binder Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920001821 foam rubber Polymers 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- -1 metal oxide compounds Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229920006259 thermoplastic polyimide Polymers 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/08—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for incorporation in vehicles
- G01G19/12—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for incorporation in vehicles having electrical weight-sensitive devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
-
- 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
- B60R21/01512—Passenger detection systems
- B60R21/01516—Passenger detection systems using force or pressure sensing means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/08—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for incorporation in vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/40—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight
- G01G19/413—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means
- G01G19/414—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only
- G01G19/4142—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only for controlling activation of safety devices, e.g. airbag systems
Definitions
- the present invention relates to an apparatus for sensing the presence and weight of an occupant of a vehicle seat.
- a seat is unoccupied or is occupied by a person of a particular size, it may not be necessary to activate a safety device associated with that seat. Furthermore, if a seat is occupied by a person of a particular size the manner in which a safety device is employed may be varied accordingly.
- One indicator of the size of a seat occupant is his or her weight. In the case of an infant, the combined weight of the infant and an infant safety seat is useful as an indicator of occupant size.
- Fig. 1 is an exploded view of a vehicle seat equipped with an occupant sensing apparatus in accordance with the present invention
- Fig. 2 is a front elevation view of a vehicle seat equipped with an occupant sensing apparatus in accordance with the present invention
- Fig. 3 is a side elevation view of a vehicle seat equipped with an occupant sensing apparatus in accordance with the present invention
- Fig. 4 is a top view of a vehicle seat equipped with an occupant sensing apparatus in accordance with the present invention
- Fig. 5 is an enlarged fragmentary view of a variable resistance force sensor located between rigid components of a vehicle seat equipped with an occupant sensing apparatus in accordance with the present invention
- Fig. 5A is an enlarged fragmentary view of a variable resistance force sensor located between rigid components of a vehicle seat equipped with an occupant sensing apparatus in accordance an alternative embodiment with the present invention
- Fig. 6 is a schematic view of an occupant sensing apparatus in accordance with the present invention
- Fig. 7 is a perspective view of a variable resistance force sensor suitable for use in the practice of the present invention
- Fig. 8 is an exploded view of another variable resistance force sensor suitable for use in the practice of the present invention
- Fig. 9 is an exploded view of another variable resistance force sensor suitable for use in the practice of the present invention.
- Fig. 10 is a side elevation view of a another vehicle seat equipped with an occupant sensing apparatus in accordance with the present invention
- Fig. 11 is an enlarged fragmentary view of a variable resistance force sensor located adjacent to the floor of a vehicle between and a rigid support member of a vehicle seat equipped in accordance with the present invention
- Figs. 12, 13 and 14 are plan views of variable resistance force sensors suitable for use in the practice of the present invention.
- Figs. 1 through 4 there are shown exploded, front elevation, side elevation and top view, respectively, of a vehicle seat equipped with an occupant sensing apparatus in accordance with the present invention.
- a vehicle seat equipped with an occupant sensing apparatus in accordance with the present invention.
- the design of various structural components of a vehicle seat can vary from one make and model of vehicle to another, with the vehicle seat shown being merely exemplary of a vehicle seat that may be employed in the practice of the present invention.
- the present invention does, however, apply to seats in general and may be employed not only with vehicle seats but also any seat where it is desired to ascertain whether or not the seat is occupied and the weight of a seat occupant.
- a rigid seat pan member 18 supports the seat cushion 10, which is adapted to be secured thereto by having bottom side that is contoured to be complementary to the rigid seat pan member.
- the rigid seat pan member has a generally rectangular shape which may be adapted to the design of a particular seat cushion and seat frame. As shown in Fig. 1 the rigid seat pan member is substantially a flat frame, however, in some seat designs the perimeter of the rigid seat pan member may be bent to form peripheral walls which may, or may not, have a second horizontal portion associated therewith.
- the rigid seat support member 16 and the rigid seat pan member 18 are fastened to one another in a vertically juxtaposed relationship, as best shown in Figs. 5 and 5A.
- the means for fastening the rigid seat support member and the rigid seat pan member to one another are a plurality of bolts 24 and nuts 26.
- the bolts extend through openings 25 in the rigid seat support member 16 and openings 27 in the rigid seat pan member 18.
- variable resistance force sensors 20 are interposed between and adjacent to both the rigid seat support member 16 and the rigid seat pan member 18 with the force transferred from the rigid seat pan member to the floor of the vehicle passing through said variable resistance force sensors which sense the magnitude of the force transferred therethrough and generate a signal which is indicative of the force transferred therethrough.
- the rigid seat pan member 18 shown in the drawings has a generally rectangular shape and a variable resistance force sensor is located in the vicinity of each corner of the rigid seat pan member. That is to say, the variable resistance force sensors are disposed at the corners of a parallelogram at the corners of a rectangle.
- corner and “corners” are understood to have their common meaning of the position (s) at which two lines or surfaces meet.
- a significant preload was placed on the force sensors.
- the result of this preload was a significant reduction in system resolution as the force sensors were subjected to a preload, or clamp load, on the order of 1,000 pounds while the seat occupant sensing system is trying to detect a seat occupant load of only about 66 pounds (approximately 17 pounds per force sensor) .
- a spring loaded fastening means comprising a shoulder bolt 24, a coil spring 19 disposed circumferentially about the should bolt and located between the head of the bolt an a rigid member 16 or 18, a washer and a nut.
- This preferred structure allows the force sensors to remain in the load path while being subjected to only a nominal preload provided by the spring load and the weight of the seat structure. While a coil spring is shown in the example, it is understood that any other suitable method of reducing the preloading on the sensors may be employed in the practice of the present invention.
- Each variable resistance force sensor 20 has a plurality of electrical leads 23 extending therefrom for communicating with a device which processes the signal from each variable resistance force sensor to determine the weight that the rigid seat pan is bearing.
- Fig. 6 there is shown a schematic view of an occupant sensing apparatus in accordance with the present invention. Signals from the variable resistance force sensors are conveyed, through an amplifier, or any other suitable signal conditioning electronics, to a device, such as a microprocessor which processes the signals, to determine the weight that the rigid seat pan member is bearing. Algorithms to translate a signal from an electronic sensor to a weight are well known. The algorithm must take into account the weight of the seat structure located above the sensors in determining the weight of the seat occupant. Of course if the weight of the seat occupant is determined to be zero, the seat is unoccupied.
- the temperature correction factor for the variable resistance force sensors disclosed herein can be modeled as :
- T is the temperature in degrees Fahrenheit
- M is a constant characterizing the sensor Generally speaking, the constant will be a function of the force sensitivity of the sensor.
- the spring preloading of the sensors disclosed above reduces, but does not completely eliminate, the preloading of the sensors .
- the preloading can change because of temperature variations. Therefore, in order for the seat occupant sensing system to be calibrated, and remain in calibration, the preload values must either remain constant or the calibration model must be updated repeatedly to account for changes in the preload value.
- the preload values were found to vary by as much as twenty-five pounds during normal seat usage. It is necessary to determine when a seat is vacated (unloaded) by an occupant so that the system can read and update the preload values accordingly.
- the force (weight) on the sensors changes most drastically when an occupant sits down or gets up from a . seat . Based on this distinctive rate of loading change, the state of the seat can be determined and the preloading adjusted accordingly.
- a working prototype of a vehicle seat equipped with an occupant sensing apparatus in accordance with the present invention employed four sensors 20, as shown in Figs. 7 and 12, which were obtained from
- variable resistance force sensors may be conventional force sensors, for example made in accordance with US 5,086,652 and US 5,222,399, which are incorporated herein by reference, and may be from 0.002 to 0.005 inches in thickness.
- the variable resistance force sensors each comprise a pair of thin backing sheets, each having an electrode 54,53 thereon disposed in a confronting pattern and a force sensitive material 50 therebetween, the resistance of the force sensitive material changing with changes in the force applied against said variable resistance force sensor which generates a signal which is indicative of the force transferred therethrough.
- the thin backing sheets are a plastic material, such as a polyester film.
- the electrodes 53,54 may be silver or any other suitable material, and may be screen printed on the backing sheets or applied using any other suitable manufacturing technique.
- An air passage 55 is left between the force sensitive material 50 and the atmosphere to prevent back pressure problems.
- the electrodes 53,54 are conductively attached to a fitting 21 which has connection means, such as pins 49, which facilitate the conduction of signal from the sensor via electrical leads 23.
- a force sensitive material 50 is deposited by screen printing, or any other suitable manufacturing technique, and is interposed between the confronting electrodes .
- the force sensitive material in the sensor of Figs. 7 and 12 is configured in an annular ring of substantially constant width with an aperture 40 through the thin backing sheets in the center of the annular ring.
- the aperture facilitates the passage of a fastening means, such as bolt, therethrough to fasten seat components to one another or the seat to the vehicle floor.
- the force sensitive material may be any suitable material such as a carbon-molybdenum disulfide material in an acrylic binder.
- the force sensitive material is a carbon-free force sensing ink having a resistance which varies as a function of the force applied thereagainst, said force sensing ink being usable in force sensing applications at temperatures up to 150° Fahrenheit and pressures of up to 10,000 pounds per square inch.
- the preferred ink includes a thermoplastic polyimide binder, conductive particles, intrinsically semi-conductive particles, and dielectric particles, all of an average particle size of 1.0 micron or less.
- the preferred semi- conductive particles are molybdenum disulfide, ferric and ferrous oxide particles .
- the preferred conductive particles are conductive metal oxide compounds that deviate from stoichiometry based on an oxygen value of two, such as conductive tin oxide, Fe 3 0 4 iron oxide, and mixtures of them.
- the preferred dielectric particles are silica.
- the binder is present in an amount of 20% to 80% by volume.
- Buttons 51,52 of force sensitive material are connected by narrower conductors 56,57 of the same force sensitive material, or any suitable conductor, to form circular arrays with an aperture 40 through the thin backing sheets in the center of the circular array. It is understood that the exact configuration of the force sensitive material may be varied in accordance with good engineering practices to suit a particular application without varying from the scope of the present invention .
- variable resistance force sensors are sandwiched between layers of materials, such as polymeric substances or metallic materials, which not only aid in reducing contamination of the sensors with abrasive particles but also serve to distribute the load across the entire surface area of the force sensitive material.
- Fig. 8 there is shown an exploded view of another variable resistance force sensor suitable for use in the practice of the present invention.
- the variable resistance force sensor 20 is sandwiched between layers 29,29 of a metallic material, such as aluminum.
- a metallic material such as aluminum.
- variable resistance force sensor 20 To facilitate the assembly of the variable resistance force sensor 20 with the layers 29,29 of metallic material pins 44 extend from one metallic layer, extend through apertures 41 in the thin backing sheets and fit into complementary apertures 45 in the other metallic layer.
- the metallic layers 29 have central apertures 42,43 which align with the central aperture 40 in the sensor to facilitate passage of a fastening means, such as a bolt, therethrough.
- a fastening means such as a bolt
- variable resistance force sensor being sandwiched between layers 31,31 of an elastomeric substance, such as neoprene, with a layer 29 of a metallic material located on a side of each of the layers of an elastomeric substance which is distal from the variable resistance force sensor.
- the layers 31 of an elastomeric substance are provided with slots 47, or any other suitable structural feature, to accommodate the mating of the metallic layers with one another.
- the layers of elastomeric material are also provided with apertures 46 therethrough to facilitate passage of a fastening means, such as a bolt, therethrough.
- the variable resistance force sensor may be sandwiched only between layers 31 of an elastomeric substance. Referring next to Figs. 10 and 11 Fig.
- variable resistance force sensor is located adjacent to the floor 33 or seat receiving member of a vehicle.
- a plurality of variable resistance force sensors are interposed between a rigid seat support member 14, which may be for example a seat leg or guide rail, and the floor of the vehicle in a location adjacent to the floor of the vehicle with the force transferred from the rigid seat pan member to the floor of the vehicle passing through the variable resistance force sensors.
- a rigid seat support member 14 which may be for example a seat leg or guide rail
- Other aspects of the invention described above, including the spring preloading of the sensors and various sensor structures may be employed in the practice of this embodiment .
- the device such as a microprocessor which determines the weight that the rigid seat pan is bearing is preferably a controller which controls the activation of at least one safety device for an occupant of the seat based upon said weight.
- the controller controls, for example, the activation of an inflatable vehicle occupant restraint or a seat belt pretensioner.
- the controller may control the manner in which an activated safety device operates, for example controlling the speed at which an airbag is inflated or the amount of seat belt slack which is to be taken up by a pretensioner.
- the seat occupant sensing system disclosed herein may determine the presence or absence of an object or person on a seat cushion, and the weight of the person or object on a seat cushion and based upon those determinations may activate one or more safety devices, and/or the manner in which an activated safety device should operate.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9910878A GB2335750B (en) | 1996-11-22 | 1997-09-26 | Seat occupant sensing system |
DE19782111T DE19782111T1 (en) | 1996-11-22 | 1997-09-26 | Seat occupancy detection system |
JP52555598A JP2002516631A (en) | 1996-11-22 | 1997-09-26 | Device to detect a sitting person |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/755,272 US5991676A (en) | 1996-11-22 | 1996-11-22 | Seat occupant sensing system |
US755,272 | 1996-11-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1998025112A2 true WO1998025112A2 (en) | 1998-06-11 |
WO1998025112A3 WO1998025112A3 (en) | 1999-08-26 |
Family
ID=25038446
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1997/017327 WO1998025112A2 (en) | 1996-11-22 | 1997-09-26 | Seat occupant sensing system |
Country Status (6)
Country | Link |
---|---|
US (1) | US5991676A (en) |
JP (1) | JP2002516631A (en) |
KR (1) | KR100411925B1 (en) |
DE (1) | DE19782111T1 (en) |
GB (1) | GB2335750B (en) |
WO (1) | WO1998025112A2 (en) |
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0919426A1 (en) * | 1997-11-28 | 1999-06-02 | TEMIC TELEFUNKEN microelectronic GmbH | Arrangement and method for seat occupancy recognition in a vehicle seat |
EP0962362A2 (en) * | 1998-06-05 | 1999-12-08 | Takata Corporation | A seat weight measuring apparatus |
LU90287B1 (en) * | 1998-09-16 | 2000-03-17 | Iee Sarl | Motor vehicle seat with integrated occupancy detection |
DE19925662A1 (en) * | 1999-06-04 | 2000-12-07 | Volkswagen Ag | Device for determining the weight and / or seat position of a vehicle occupant |
EP0950560A3 (en) * | 1998-04-16 | 2000-12-27 | Takata Corporation | A seat weight measuring apparatus |
DE10053917A1 (en) * | 1999-11-04 | 2001-09-13 | Takata Corp | Seat weight measuring device |
US6412357B2 (en) | 1998-09-16 | 2002-07-02 | I.E.E. International Electronics & Engineering S.A.R.L. | Motor vehicle seat with integrated occupation detector |
WO2002086434A2 (en) * | 2001-04-21 | 2002-10-31 | Robert Bosch Gmbh | Device and method for calibrating a sensor |
US6476514B1 (en) | 2000-03-29 | 2002-11-05 | Ford Global Technologies, Inc. | Occupant detection sensor assembly for seats |
GB2360097B (en) * | 1998-11-17 | 2003-04-23 | Automotive Tech Int | Apparatus and method for measuring weight of an occupying item of a seat |
US6653577B2 (en) | 1995-06-07 | 2003-11-25 | Automotive Technologies | Apparatus and method for measuring weight of an occupying item of a seat |
US6689962B2 (en) | 1995-06-07 | 2004-02-10 | Automotive Technologies International, Inc | Weight measuring system and method used with a spring system of a seat |
US6782316B2 (en) | 1995-06-07 | 2004-08-24 | Automotive Technologies International, Inc. | Apparatus and method for adjusting a steering wheel |
US6786104B1 (en) | 1999-11-04 | 2004-09-07 | Takata Corporation | Seat weight measuring apparatus |
US6792342B2 (en) * | 1995-06-07 | 2004-09-14 | Automotive Technologies International, Inc. | Apparatus and method for controlling a vehicular component |
EP1503190A2 (en) * | 2003-07-31 | 2005-02-02 | Texas Instruments Incorporated | Seat occupant weight sensor, method for making and system therefor |
US6958451B2 (en) | 1995-06-07 | 2005-10-25 | Automotive Technologies International, Inc. | Apparatus and method for measuring weight of an occupying item of a seat |
DE10242256B4 (en) * | 2002-09-12 | 2007-05-24 | Robert Bosch Gmbh | force sensor |
US7243945B2 (en) | 1992-05-05 | 2007-07-17 | Automotive Technologies International, Inc. | Weight measuring systems and methods for vehicles |
US7387183B2 (en) | 1995-06-07 | 2008-06-17 | Automotive Technologies International, Inc. | Weight measuring systems and methods for vehicles |
EP2031362A1 (en) * | 2007-08-30 | 2009-03-04 | Hill-Rom Industries SA | Sensor for detecting and measuring pressure including at least one force-detecting resistive cell |
US7620521B2 (en) | 1995-06-07 | 2009-11-17 | Automotive Technologies International, Inc. | Dynamic weight sensing and classification of vehicular occupants |
US7779956B2 (en) | 1995-06-07 | 2010-08-24 | Automotive Technologies International, Inc.. | Vehicular seats with weight sensing capability |
US7900736B2 (en) | 1995-06-07 | 2011-03-08 | Automotive Technologies International, Inc. | Vehicular seats with fluid-containing weight sensing system |
CN103091008A (en) * | 2011-10-31 | 2013-05-08 | 爱信精机株式会社 | Load detection device for vehicle seat |
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US6784379B2 (en) | 1995-06-07 | 2004-08-31 | Automotive Technologies International, Inc. | Arrangement for obtaining information about an occupying item of a seat |
US6833516B2 (en) | 1995-06-07 | 2004-12-21 | Automotive Technologies International, Inc. | Apparatus and method for controlling a vehicular component |
US7523803B2 (en) * | 1995-06-07 | 2009-04-28 | Automotive Technologies International, Inc. | Weight determining systems and methods for vehicular seats |
US20090046538A1 (en) * | 1995-06-07 | 2009-02-19 | Automotive Technologies International, Inc. | Apparatus and method for Determining Presence of Objects in a Vehicle |
US7976060B2 (en) | 1995-06-07 | 2011-07-12 | Automotive Technologies International, Inc. | Seat load or displacement measuring system for occupant restraint system control |
US7762582B2 (en) * | 1995-06-07 | 2010-07-27 | Automotive Technologies International, Inc. | Vehicle component control based on occupant morphology |
US20080189053A1 (en) * | 1995-06-07 | 2008-08-07 | Automotive Technologies International, Inc. | Apparatus and Method for Analyzing Weight of an Occupying Item of a Vehicular Seat |
US8054203B2 (en) * | 1995-06-07 | 2011-11-08 | Automotive Technologies International, Inc. | Apparatus and method for determining presence of objects in a vehicle |
US7770920B2 (en) * | 1995-06-07 | 2010-08-10 | Automotive Technologies International, Inc. | Vehicular seats with fluid-containing weight sensing system |
US20070135982A1 (en) | 1995-06-07 | 2007-06-14 | Automotive Technologies International, Inc. | Methods for Sensing Weight of an Occupying Item in a Vehicular Seat |
EP1839930B1 (en) * | 1999-01-14 | 2010-09-29 | Toyota Jidosha Kabushiki Kaisha | Sitting passenger detecting apparatus and sitting passenger detecting method |
DE10005445C2 (en) * | 1999-02-08 | 2002-08-14 | Takata Corp | Diagnostic method for a seat load measuring device |
US6557424B1 (en) * | 1999-02-24 | 2003-05-06 | Siemens Vdo Automotive Corporation | Method and apparatus for sensing seat occupant weight |
US6342683B1 (en) * | 1999-05-20 | 2002-01-29 | Takata Corporation | Weight sensor for vehicle occupant |
JP2001074543A (en) | 1999-09-06 | 2001-03-23 | Toyota Motor Corp | Seating occupant detecting device |
US6301977B1 (en) | 2000-05-02 | 2001-10-16 | Stojan Stojanovski | Vehicle seat belt transducer for child's seat |
US6735508B2 (en) * | 2000-07-12 | 2004-05-11 | Siemens Ag | Hardware independent mapping of multiple sensor configurations for classification of persons |
DE10035483B4 (en) * | 2000-07-21 | 2005-07-21 | Sartorius Hamburg Gmbh | Force transducer for a vehicle seat |
JP3694450B2 (en) * | 2000-09-18 | 2005-09-14 | アルプス電気株式会社 | Load sensor |
JP2002144936A (en) * | 2000-11-08 | 2002-05-22 | Nhk Spring Co Ltd | Sitting sensing device for automobile seat |
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Also Published As
Publication number | Publication date |
---|---|
GB2335750B (en) | 2001-02-07 |
US5991676A (en) | 1999-11-23 |
JP2002516631A (en) | 2002-06-04 |
GB2335750A8 (en) | 1999-11-04 |
DE19782111T1 (en) | 1999-12-23 |
GB2335750A (en) | 1999-09-29 |
GB9910878D0 (en) | 1999-07-07 |
KR100411925B1 (en) | 2003-12-18 |
WO1998025112A3 (en) | 1999-08-26 |
KR20000057196A (en) | 2000-09-15 |
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