WO2007012609A1 - Capteur capacitif permettant une discrimination morphologique d'un occupant dans un siège automobile - Google Patents
Capteur capacitif permettant une discrimination morphologique d'un occupant dans un siège automobile Download PDFInfo
- Publication number
- WO2007012609A1 WO2007012609A1 PCT/EP2006/064505 EP2006064505W WO2007012609A1 WO 2007012609 A1 WO2007012609 A1 WO 2007012609A1 EP 2006064505 W EP2006064505 W EP 2006064505W WO 2007012609 A1 WO2007012609 A1 WO 2007012609A1
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- WO
- WIPO (PCT)
- Prior art keywords
- electrode
- electrodes
- main
- seat
- sensors
- Prior art date
Links
- 230000000877 morphologic effect Effects 0.000 title description 4
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 12
- 230000005684 electric field Effects 0.000 claims description 28
- 238000005259 measurement Methods 0.000 claims description 15
- 210000001217 buttock Anatomy 0.000 claims description 3
- 210000000689 upper leg Anatomy 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 239000012815 thermoplastic material Substances 0.000 claims description 2
- 238000007792 addition Methods 0.000 claims 1
- 238000009826 distribution Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 238000002513 implantation Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 241000826860 Trapezium Species 0.000 description 1
- 230000009102 absorption Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
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- 238000013270 controlled release Methods 0.000 description 1
- 230000034994 death Effects 0.000 description 1
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- 238000000151 deposition Methods 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
- G01D5/2405—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by varying dielectric
Definitions
- the present invention relates to the field of sensors.
- the present invention relates to the field of capacitive sensors.
- the present invention relates to a capacitive sensor adapted to allow morphological discrimination of a passenger in a car seat.
- the present invention finds in particular, but not exclusively, application in the control of trigger airbags or "airbags" according to English terminology, in a motor vehicle.
- empty seat includes 1) the case of an unoccupied seat or occupied by a child seat (with or without children) and 2) the case of a seat occupied by a child. under 6 years old.
- the 5th percentile (46-53 kg / 1.4-1.65 m) corresponding mainly to women and persons of small diverence,. the 50th percentiles (68-73 kg / 1.7-1.8 m) corresponding to the majority of the population and. the 95th percentiles (94-98 kg / 1.83-1.93 m) including those of high body build.
- the senor generally comprises coplanar electrodes placed below the cap of the seat.
- the presence of an individual in a car seat changes the surrounding permittivity thus changing the value of the sensor's capacitance.
- Patent WO-A-00/25098 describes an example of such a sensor coupled to a charge detection system.
- the means described in this document can detect the presence or position of a passenger in a seat. This type of sensor generally gives satisfaction.
- it has some disadvantages in the presence of wet element placed on the seat or when the seat foam is impregnated with water vapor.
- the main object of the present invention is to propose a new detection device which allows a more reliable detection of the morphology of an individual or of an object placed on a motor vehicle seat.
- a detection assembly comprising in combination on the one hand a sensor comprising three electrodes: two main electrodes covering different areas of the space and the third auxiliary electrode, surrounding quasi -totally the two main electrodes, and secondly treatment means connected to the electrodes for supplying them under controlled voltage levels, exploiting the signals taken from them in the form of ratios between two signals and delivering for one part of the binary information representative of the recovery or non-recovery of a main electrode by comparison of the signal taken from it with a predetermined threshold and, on the other hand, of the information analog representative of the percentage of overlap of at least one electrode.
- ratios between two signals makes it possible to overcome possible drifts depending on the temperature or the humidity level of the environment.
- the present invention also relates to seats equipped with aforementioned detection assemblies as well as the sensors themselves involved in these sets.
- FIG. 1 schematically represents the modeling of a human body by geometric projection
- FIGS. 2a and 2b show a statistical population distribution
- FIG. 3 represents a plan view of a sensor according to a first embodiment of the present invention
- FIG. 4 represents a plan view of a sensor according to a second embodiment of the present invention
- FIGS. 5 and 6 show schematically the implantation of sensors on the base or seat and on the back of a motor vehicle seat
- FIG. 7 represents the response curves obtained at the output of sensors according to the present invention for different power supply or operating configurations
- FIG. 8 represents a table summarizing the signal supply and exploitation sequence according to a preferred implementation of the present invention.
- the approach that led the inventors to conceive the present invention is as follows.
- the drift of a capacitive sensor is proportional to the value of the vacuum capacity called "offset capacity". Therefore, it is desirable, in order to minimize the sensor drifts, to shorten the length of the capacitive probe electrodes.
- an elementary sensor of sufficiently small size to be considered as an "elementary pixel" so as to obtain a binary detection information: presence or absence of a passenger covering the elementary sensor.
- the inventors modeled the human body, as shown diagrammatically in FIG. 1, by geometric projections and from various databases, in particular databases of automobile manufacturers from different countries reflecting the statistical distribution of the populations. as for example: 1) that emitted by the "Highway safety research of Michigan” entitled “Highway safety research of Michigan on 1977 including infants, children and youths to age 18", 2) that issued by the PSA group, more precisely the Laboratory of physiology and biomechanics of the association Peugeot-Renault, and 3) that emitted by the SAE called "Caesar" which concerns the American population from 18 to 79 years.
- the present invention makes it possible to minimize the number of sensors required and therefore overcomes these disadvantages.
- the present invention also makes it possible to minimize the drifts of offset parasitic capacitances.
- FIG. 1 An attached example of a sensor according to the present invention is illustrated in FIG. 1
- FIG. 3 shows a sensor 100 comprising three electrodes 110, 120 and 130.
- the present invention is not limited to sensors comprising three electrodes.
- the present invention is applicable to sensors comprising a greater number of electrodes.
- the electrodes 110 and 120 which will be called principal, are intended essentially to perform a pixellisation, that is to say an all or nothing detection of presence or absence, at their level.
- the electrode 130 which will be called auxiliary, is intended essentially to perform an analog type of detection, that is to say provide information representative of the percentage of its recovery by an individual or an object.
- Each of the main electrodes 110 and 120 comprises, according to FIG. 3, a rectilinear main strand 112, 122. The strands 112 and 122 are aligned.
- the main strands 112 and 122 could have a different geometry, for example a sinusoidal, trapezoidal geometry, etc.
- the main strands 112, 122 are provided with connecting sections 114, 124. These are generally orthogonal to the main strands 112, 122.
- the electrodes 110 and 120 thus each have an overall "L" geometry.
- the two electrodes 110 and 120 have a symmetry with respect to a median plane referenced A in FIG. 3.
- This plane A is perpendicular to the main strands 112, 122 and parallel to the connection sections 114, 124.
- the auxiliary electrode 130 has the general form of an open loop 132 which almost completely surrounds the main electrodes 110, 120.
- the open loop 132 is itself provided at one of its ends with a connecting section 134, parallel to the aforementioned sections 114 and 124
- the auxiliary electrode 130 thus has the general shape of a "T" whose foot is composed of the link section 134 while the head is composed of the open loop 132. More precisely, the loop 132 is composed of three straight sections.
- the sections 1320, 1322, 1323 interconnected, in pairs, by curved sections 1321 and 1324.
- the sections 1320 and 1323 have lengths substantially identical to the main strands 112, 122 of the main electrodes 1 10, 120.
- the section 1322 has a length substantially equal to twice that of the main strands 112, 122.
- the sensor composed of the three electrodes 110, 120 and 130 thus has a general symmetry with respect to a plane B, parallel to the above-mentioned plane A, and passing through the median connection section 124 associated with the electrode 120.
- the electrodes 110, 120 and 130 are in respective known surface ratios.
- the three electrodes 110, 120 and 130 have identical widths e
- the main strands 112 and 122 have identical lengths L and the distances separating the different electrode elements 112, 122, 132, and 114, 124 and 134 are identical and constant.
- main electrodes 110 and 120 of the same surface and main electrodes 110, 120 which have a surface equal to one quarter of that of the auxiliary electrode 130.
- Other electrode geometries 110, 120 and 130 may however be retained within the scope of the present invention.
- electrodes 110 and 120 having identical surfaces, but of different width and length, for example an electrode 110 having a width twice that of the electrode 120, but a length that is two times smaller.
- electrodes 110 and 120 of different surfaces in a known ratio, for example an electrode 110 having a double surface of the electrode 120.
- the main strands 112, 122 of the main electrodes 110, 120 may have lengths of the order of 35 mm to 150 mm.
- the sensor 100 illustrated in FIG. 3 and previously described thus comprises 3 inputs 114, 124 and 134 respectively connected to 3 electrodes 110, 120 and 130.
- these three electrodes will be referred to respectively for the electrode 110 "pixel C1
- connection sections 114, 124 and 134 are used to connect the electrodes 110, 120 and 130 to supply and processing means shown diagrammatically at 200 in FIG. 3.
- These means 200 preferably comprise feed means and charging in accordance with the teaching of WO-A-00/25098.
- the means 200 preferably comprise power supply means capable of delivering a controlled amplitude DC voltage, an integrator stage comprising a capacitance switching system and control means adapted to define cyclically, at a controlled frequency, a sequence of two sequences:
- the sensor 100 can be made using any appropriate technology.
- the electrodes 110, 120 and 130 are deposited by screen printing on a flexible and thin substrate of thermoplastic material adapted to be integrated into a motor vehicle seat.
- the aforesaid flexible substrate is formed of polyethylene terephthalate (PET) or of any other similar support having a relatively low dielectric constant, typically ⁇ ⁇ 4 and stable in temperature and humidity, as well as a very low porosity to avoid the absorptions of water.
- PET polyethylene terephthalate
- the sealing of the sensor can be ensured by any appropriate means, for example by depositing a waterproof film on the entire surface of the sensor, or by coating it in a material or a waterproof foam such as polyethylene (PE) which presents a relatively low dielectric constant ⁇ ⁇ 4 and stable in temperature and humidity.
- PE polyethylene
- the means 200 define a sequence of steps of feeding the electrodes 110, 120 and 130 and taking signals on these electrodes, adapted to obtain elemental or combined pixelation information and / or analog information.
- the means 200 thus define a measurement sequence comprising steps denoted Cl, C2, U, ClU, C2U, UCl, UC2, UC1C2 and C1 + C2.
- the information C1 of the first pixel is obtained by applying an electric field between C1 and U, ie between the electrodes 110 and 130, and by measuring the electrical charges on Cl (electrode 110) with respect to U (electrode 130), the pixel C2 (electrode 120) being connected to ground.
- the information C2 of the second pixel is obtained by applying an electric field between C2 and U, ie between the electrodes 120 and 130, and by measuring the electrical charges on C2 (electrode 120) with respect to U (electrode 130), the pixel C1 (electrode 110) being connected to ground.
- the analogical information U is obtained by applying an electric field on the electrode U, ie the electrode 130, with respect to the electrodes C1 and C2, ie the electrodes 110 and 120, connected to ground and measuring the electrical charges on U (electrode 130).
- the pixel information ClU is obtained by applying an electric field between C1 and U, ie between the electrodes 110 and 130, and by measuring the electrical charges on Cl (electrode 110) with respect to U
- Electrode 130 the pixel C2 (electrode 120) being connected to the electric field to neutralize its influence.
- Electrode 130 the pixel C1 (electrode 110) being connected to the electric field to neutralize its influence.
- the analogical information UCl is obtained by applying an electric field on the electrode U, ie 130, relative to C1, or 110, and by measuring the electrical charges on U (electrode 130), the pixel C2
- Electrode 120 being connected to the electric field to neutralize its influence.
- the analog information UC2 is obtained by applying an electric field on the electrode U, ie 130, with respect to C2, or 120, and by measuring the electrical charges on U (electrode 130), the pixel C1
- Electrode 110 being connected to the electric field to neutralize its influence.
- the analog information UC1C2 is obtained by applying an electric field on the electrodes U, Cl and C2, ie 130, 110 and 120, and by measuring the electrical charges on U (electrode 130). This measurement directly reflects the capacitance between the U electrode and a target (for example a passenger).
- the senor according to the present invention makes it possible to obtain either information known as rasterization, all or nothing, presence or absence of individual or object vertically electrodes C1, C2 concerned or analog measurements representative of the percentage of overlap of the electrodes. Moreover, the sensor according to the present invention makes it possible to obtain, with only three inputs 114, 124 and 134, pixel information C1, C2, ClU, C2U, C1 + C2 and 4 analogical informations U, UCl, UC2 and UC1C2. or more derived information.
- the responses thus obtained allow the means 200 to morphologically discriminate certain classes of passengers. Indeed the combination of the information thus obtained from the different sensors placed on a seat (and a preferred configuration will be described later with reference to Figures 5 and 6) allows to determine in particular the position of the passenger (and if necessary correct gross measurements obtained if offset lateral positioning of the passenger is shifted) and an order of magnitude of the width of the thighs and buttocks, the width of the shoulders and the gluteal-shoulder height, determining parameters as previously indicated to discriminate .
- the different responses obtained using the previously described sensor according to the present invention are simulated in the appended FIG.
- the curves illustrated in FIG. 7 correspond to the responses obtained for the various steps of the sequence previously described, progressively recovering the electrodes using an object of length equal to the total length of the sensor and coming from the left.
- the seat of the seat preferably the seat of the seat, and if necessary the back of it, are equipped with several sensors according to the present invention. A preferred embodiment of these different sensors will be described later.
- the means 200 are adapted to reiterate an additional sequence of measurements, called “global”, comprising steps similar to the previously described steps C1, C2, U, ClU, C2U, UCl, UC2, UC1C2 and C1 + C2 (called “normal” sequences), respectively on each of these sensors, while carrying the other sensors simultaneously not to the ground, but to the measurement potential.
- the sequence of steps thus produced is shown schematically on the bottom of FIG. 8. These steps are referenced CIg, C2g, Ug, ClUg, C2Ug, UCIg, UC2g, UClC2g and Clg + C2g.
- the sensor variant 100 illustrated in FIG. 4 will now be described.
- This electrode 130 which has the general shape of a T comprises a foot composed of the rectilinear connection section 134 and a head composed of two open loops 132a, 132b symmetrical with respect to the plane C.
- Each of the loops 132a, 132b is composed of two rectilinear sections 1320a, 1320b, 1322a, 1322b, perpendicular to the plane of symmetry C, connected by curved sections 1321a, 1321b.
- the main electrodes 110, 120 each have an L shape.
- Each main electrode 110, 120 comprises a main section 112, 122, preferably rectilinear (although a sinusoidal shape, trapezium or other is possible), and an orthogonal connection section 114, 124.
- the main strands 112, 122 are preferably aligned with each other, orthogonal to the plane C and extend in opposite directions from it. They are furthermore surrounded respectively by one of the loops 132a, 132b.
- the link sections 114, 124 are parallel to the plane of symmetry C and to the link sections 134.
- FIG. 5 shows the seat 200 of a motor vehicle seat comprising a central part 210 and side parts
- the seat 200 of the seat is preferably equipped with:
- a sensor 100S4 of length equal to the width of the central portion 210 between the seams 221, 223 and placed towards the front of the seat at 1/3 of the length thereof taken between the front and the 'back.
- the seat back is also equipped with sensors.
- the implantation of the sensors on the backrest is identical to the implantation on the seat.
- FIG. 6 thus shows a seat back 250 comprising a central portion 260 and lateral portions 270, 272, separated from the central portion 260 by seams 271, 273.
- the lateral portions 270, 272 are generally called "bolsters". ".
- This folder 250 is equipped with: sensors 100Sl, 100S6, on each of the two lateral portions 270, 272, perpendicular to the seams 271, 273, substantially 2/3 of the backrest upwards,
- 100S6, comprises three electrodes 110, 120, 130 in accordance with the arrangements previously described.
- all the sensors 100Sl, 100S2, 100S3, 100S4, 100S5, 100S6 are connected to common processing means 200.
- the means 200 can easily determine the typical morphology of the individual detected on the seat by comparing the pixel and analog information obtained on the basis of the processing of the signals taken from the electrodes 110, 120 and 130 with information contained in a reference file. , to control accordingly an airbag or airbag.
- the present invention enables accurate detection allowing discrimination in the morphology of different passengers, with a low number of sensors and therefore a reduced cost.
- the present invention is not limited to the particular embodiments which have just been described, but extends to any variant within its spirit.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Seats For Vehicles (AREA)
- Air Bags (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0802751A GB2443765B (en) | 2005-07-28 | 2006-07-21 | Capacitive sensor for morphological discrimination of a motor vehicle seat occupant |
JP2008523336A JP4943431B2 (ja) | 2005-07-28 | 2006-07-21 | 自動車座席占有者の形態識別用静電容量センサ |
DE112006001964T DE112006001964T5 (de) | 2005-07-28 | 2006-07-21 | Kapazitiver Sensor zur morphologischen Unterscheidung von Insassen auf einem Fahrzeugsitz |
US11/996,960 US8033182B2 (en) | 2005-07-28 | 2006-07-21 | Capacitive sensor for morphological discrimination of a motor vehicle seat occupant |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0508072A FR2889304B1 (fr) | 2005-07-28 | 2005-07-28 | Capteur capacitif permettant une discrimination morphologique d'un occupant dans un siege automobile |
FR05/08072 | 2005-07-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007012609A1 true WO2007012609A1 (fr) | 2007-02-01 |
Family
ID=36096324
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2006/064505 WO2007012609A1 (fr) | 2005-07-28 | 2006-07-21 | Capteur capacitif permettant une discrimination morphologique d'un occupant dans un siège automobile |
Country Status (6)
Country | Link |
---|---|
US (1) | US8033182B2 (fr) |
JP (1) | JP4943431B2 (fr) |
DE (1) | DE112006001964T5 (fr) |
FR (1) | FR2889304B1 (fr) |
GB (1) | GB2443765B (fr) |
WO (1) | WO2007012609A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010096743A (ja) * | 2008-09-19 | 2010-04-30 | Denso Corp | 静電式乗員検知装置の調整方法及び静電式乗員検知装置 |
US8033182B2 (en) | 2005-07-28 | 2011-10-11 | Hitachi Computer Products (Europe) S.A.S. | Capacitive sensor for morphological discrimination of a motor vehicle seat occupant |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1857329A1 (fr) * | 2006-05-17 | 2007-11-21 | Hitachi Computer Products (Europe) S.A.S. | Procédé pour améliorer la localisation d'un objet en regard d'un capteur |
EP1857330B1 (fr) * | 2006-05-17 | 2009-11-25 | Hitachi Computer Products (Europe) S.A.S. | Procédé pour déterminer la morphologie d'un occupant dans un siège de véhicule à l'aide d'un capteur capacitif |
US20110273189A1 (en) * | 2010-05-06 | 2011-11-10 | Steve Gerber | Sensing apparatus for and associated methods |
US9266454B2 (en) | 2013-05-15 | 2016-02-23 | Gentherm Canada Ltd | Conductive heater having sensing capabilities |
KR101799842B1 (ko) | 2013-10-11 | 2017-11-21 | 젠썸 캐나다 유엘씨 | 히팅장치에 의한 탑승자 감지 |
US10183667B2 (en) | 2015-09-15 | 2019-01-22 | Deere & Company | Human presence detection on a mobile machine |
DE102017215333A1 (de) * | 2017-09-01 | 2019-03-07 | Witte Automotive Gmbh | Kapazitive Sensoranordnung und Fahrzeugaußengriff |
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EP0257724A2 (fr) * | 1986-08-27 | 1988-03-02 | Ohmatoi Naoyuki | Capteur à trois électrodes pour comparaison de phase et circuit pour ajuster la phase d'impulsion pour ce capteur |
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WO2000025098A2 (fr) * | 1998-10-23 | 2000-05-04 | Claude Launay | Dispositif de mesure capacitif |
EP1103796A1 (fr) * | 1999-11-19 | 2001-05-30 | ESEC Trading S.A. | Capteur pour la détection d'un niveau prédéterminé dans un récipient |
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JP2006010490A (ja) * | 2004-06-25 | 2006-01-12 | Denso Corp | 静電容量式センサおよび乗員検知システム |
FR2889304B1 (fr) | 2005-07-28 | 2007-09-21 | Hitachi Comp Products Europ Sa | Capteur capacitif permettant une discrimination morphologique d'un occupant dans un siege automobile |
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-
2005
- 2005-07-28 FR FR0508072A patent/FR2889304B1/fr not_active Expired - Fee Related
-
2006
- 2006-07-21 DE DE112006001964T patent/DE112006001964T5/de not_active Withdrawn
- 2006-07-21 WO PCT/EP2006/064505 patent/WO2007012609A1/fr active Application Filing
- 2006-07-21 US US11/996,960 patent/US8033182B2/en not_active Expired - Fee Related
- 2006-07-21 JP JP2008523336A patent/JP4943431B2/ja not_active Expired - Fee Related
- 2006-07-21 GB GB0802751A patent/GB2443765B/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0257724A2 (fr) * | 1986-08-27 | 1988-03-02 | Ohmatoi Naoyuki | Capteur à trois électrodes pour comparaison de phase et circuit pour ajuster la phase d'impulsion pour ce capteur |
US5446391A (en) * | 1992-04-23 | 1995-08-29 | Aisin Seiki Kabushiki Kaisha | Dielectric detecting device |
WO2000025098A2 (fr) * | 1998-10-23 | 2000-05-04 | Claude Launay | Dispositif de mesure capacitif |
EP1103796A1 (fr) * | 1999-11-19 | 2001-05-30 | ESEC Trading S.A. | Capteur pour la détection d'un niveau prédéterminé dans un récipient |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8033182B2 (en) | 2005-07-28 | 2011-10-11 | Hitachi Computer Products (Europe) S.A.S. | Capacitive sensor for morphological discrimination of a motor vehicle seat occupant |
JP2010096743A (ja) * | 2008-09-19 | 2010-04-30 | Denso Corp | 静電式乗員検知装置の調整方法及び静電式乗員検知装置 |
Also Published As
Publication number | Publication date |
---|---|
GB2443765A (en) | 2008-05-14 |
US8033182B2 (en) | 2011-10-11 |
GB0802751D0 (en) | 2008-03-26 |
JP4943431B2 (ja) | 2012-05-30 |
GB2443765B (en) | 2010-09-15 |
JP2009502616A (ja) | 2009-01-29 |
US20080211213A1 (en) | 2008-09-04 |
FR2889304B1 (fr) | 2007-09-21 |
DE112006001964T5 (de) | 2008-05-29 |
FR2889304A1 (fr) | 2007-02-02 |
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