WO1995013204A1 - Appareil electronique destine a commander un chauffage de siege - Google Patents
Appareil electronique destine a commander un chauffage de siege Download PDFInfo
- Publication number
- WO1995013204A1 WO1995013204A1 PCT/DE1994/001254 DE9401254W WO9513204A1 WO 1995013204 A1 WO1995013204 A1 WO 1995013204A1 DE 9401254 W DE9401254 W DE 9401254W WO 9513204 A1 WO9513204 A1 WO 9513204A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electronic device
- seat
- connection
- heating element
- transistor
- Prior art date
Links
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
- G01G19/40—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
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/62—Accessories for chairs
- A47C7/72—Adaptations for incorporating lamps, radio sets, bars, telephones, ventilation, heating or cooling arrangements or the like
- A47C7/74—Adaptations for incorporating lamps, radio sets, bars, telephones, ventilation, heating or cooling arrangements or the like for ventilation, heating or cooling
- A47C7/748—Adaptations for incorporating lamps, radio sets, bars, telephones, ventilation, heating or cooling arrangements or the like for ventilation, heating or cooling for heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
- B60H1/00742—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models by detection of the vehicle occupants' presence; by detection of conditions relating to the body of occupants, e.g. using radiant heat detectors
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- 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
- B60N2/56—Heating or ventilating devices
- B60N2/5678—Heating or ventilating devices characterised by electrical systems
- B60N2/5685—Resistance
-
- 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
- B60R21/0153—Passenger detection systems using field detection presence sensors
- B60R21/01532—Passenger detection systems using field detection presence sensors using electric or capacitive field sensors
-
- 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
- B60R21/0153—Passenger detection systems using field detection presence sensors
- B60R21/0154—Passenger detection systems using field detection presence sensors in combination with seat heating
Definitions
- the invention relates to an electronic device for controlling a seat heater according to the preamble of claim 1.
- a vehicle seat heatable To increase vehicle comfort, it is known to make a vehicle seat heatable. For this purpose, it has a heating coil integrated into the seat surface, which can be connected to the vehicle's battery as required or automatically, depending on the temperature, by interposing a switch.
- the negative pole of the heating winding is due to ground potential.
- the positive pole is in series with a temperature controller. On some vehicles, the positive pole is additionally provided with an on-off switch.
- means for seat occupancy detection can expediently serve to determine whether the respective vehicle occupant is in a system-appropriate seating position or not. In the event of an accident, this determination can be used as a decision criterion for whether an airbag system is triggered at all or possibly only a little later, in order to prevent or at least reduce a possible risk of injury to the vehicle occupant as a result of an incorrect seating position. Even in the run-up to an accident situation, however, an incorrect seating position could be displayed using suitable display means, such as a warning lamp or a signal generator.
- a vehicle seat which has a load-dependent switch arranged in the seat surface.
- this switch changes its switching state and can, for example, close a circuit.
- This switch is a component that is independent of seat heating.
- a capacitive measurement with oscillators from DE-OS 3044 789 is known in order to recognize people in the closing area of doors.
- the person moves between the capacitance electrodes of an air capacitor and thereby increases the capacitance of the oscillator capacitor.
- the oscillator frequency decreases.
- a device is also known in a vehicle, which makes it possible to wear a seat belt check.
- This device provides a seat electrode and one or two belt electrodes.
- An occupied seat is recognized by an increase in capacity between the seat electrode and belt electrode or an increase in capacity between the two belt electrodes.
- the oscillation frequency of the oscillating circuit depends on the occupancy of the seat by a vehicle occupant.
- the electrode arranged in the vehicle seat is not part of a seat heater.
- the capacitor increases its capacity through a passenger.
- the oscillator lowers its frequency.
- a counter memory is provided which counts the oscillator pulses for a fixed time of 0.1 sec and serially forwards them to the microcomputer via the memory. It is not the absolute capacity that is evaluated, but rather its current change.
- a vehicle seat with seat heating is also known, in which the seat heating serves as a sensor for a seat occupancy detection circuit in a double function.
- the electronic device with the characterizing features of claim 1 has numerous advantages.
- the fact that at least parts of an already existing seat heater serve as a means of recognizing the seat occupancy makes it possible to implement a particularly simple and therefore inexpensive construction of a vehicle seat.
- the electronic device also has the advantage that the heating element and the relay circuit connecting the heating element to the electronic device or the current source are faulty can be monitored; in particular, it is also possible to record the relay pull-in time.
- the device also enables the seat heating to be switched on and operated over any period of time, and the frequency measurement of an oscillator whose oscillation frequency is influenced by the heating element. This makes it possible to determine in a simple manner whether or not the vehicle seat is occupied by a vehicle occupant. All of these diverse control functions are made possible with only a single connecting line which connects the electronic device to a central control device (airbag control device).
- Figure 1 shows the block diagram of a system that includes the heating element of the seat heater, an electronic device, a temperature controller and a central control unit;
- Figure 2 shows the circuit diagram of a first embodiment of the electronic device;
- FIG. 3 shows a second exemplary embodiment in the form of a block diagram and
- FIG. 4 shows the circuit diagram of the second exemplary embodiment of an electronic device.
- reference number 1 denotes the heating element of an electric seat heater, which is connected to voltage via contacts that can be controlled by an electronic device 4, in particular relay contacts 3, when the seat is occupied.
- the heating element 1 is switched on and off at the control command of a temperature controller 2 connected to the electronic device 4.
- the heating element 1 is, preferably with a tap 5, at a connection of the electronic one Device 4.
- the electronic device 4 is still connected to the airbag control device 6 via a line 9.
- the electronic device 4 briefly switches off the heating element via the contacts 3 in order to determine a seat occupancy and measures the frequency of an oscillator whose oscillation frequency is influenced by the heating element 1.
- a repeated connection of the heating element 1 by means of the contacts 3 takes place only if the measurement has shown that the seat is occupied.
- FIG. 2 shows the circuit diagram of a first exemplary embodiment of the electronic device.
- Reference number 1 denotes a heating element for the seat heating of a vehicle, which is divided into two sub-elements 1a, 1b.
- One end connection of the partial element 1b is connected to the ground connection, while the other end connection of the partial element 1b is connected to a first relay contact Rel1, the other connection of which is connected to the first end piece of the second partial element 1a.
- the second connection of the sub-element 1a is on the one hand connected to a first relay contact Rel2, the other connection of which is connected to the positive operating voltage connection ÜB.
- the first relay contact of Rel2 is connected via a resistor R17 to the inverting input connection of a circuit (operational amplifier) IC1 / 2.
- the inverting input terminal is also connected to ground via a capacitor C4 and a diode D6 and, on the other hand, to the operating voltage U1 via a diode D5.
- the inverting input terminal is connected to the output terminal of the circuit IC1 / 2 via the resistor R14.
- the non-inverting input connection of this circuit is in turn connected to the ground connection via a resistor R16, to the operating voltage connection U1 via a resistor R15 and finally to the output connection of the circuit IC1 / 2 via a further resistor R13.
- the output terminal of the circuit IC1 / 2 is connected via a resistor R9 to the gate terminal of a transistor T1, the source terminal of which is connected to ground and the drain terminal of which is led to the junction of two resistors R2, R3.
- this connection point is connected to ground via a Zener diode D1.
- the other connection of the resistor R2 is connected to the operating voltage U1 via a further resistor R1 and on the other hand to a connection of the airbag control unit 6.
- the other connection of the resistor R3 leads to the inverting input connection of a circuit IC 1/1, which continues to have a capacitor C1 is grounded.
- the non-inverting input connection of the circuit IC 1/1 is connected on the one hand via a resistor R4 to the ground connection, on the other hand via the resistor R5 to the operating voltage connection U1 and finally via a resistor R6 to the output connection of the circuit IC 1/1.
- This output connection is also connected to the operating voltage connection U1 via a resistor R7.
- the output terminal of the circuit IC 1/1 leads to the gate terminal of a second transistor T2, the source terminal of which is connected to the drain terminal of a third transistor T3.
- the source connection of this third transistor T3 is connected to ground, while its gate connection is connected to ground on the one hand via a Zener diode D7 and on the other hand is connected to a connection of a temperature controller 2 via a resistor R11.
- the connection of the temperature controller 2 is still connected to ground via a resistor R10.
- In the drain circuit of transistor T2 is a winding of a relay Rel, which is connected to a diode D2 in parallel.
- the connection of the relay winding remote from the transistor T2 is connected via a diode 3 to the positive operating voltage source UB, which in turn is connected to ground via a capacitor C2.
- the connection point between the diode D3 and the relay winding is via a resistor R8 at the operating voltage connection U1 is in turn connected to the ground connection via a Zener diode D4 on the one hand and a capacitor C3 on the other hand.
- a heating power requirement is determined, for example, by a temperature sensor that is operatively connected to the temperature controller 2, the temperature controller 2 controls the transistor T3 into the conductive state via the resistor R11.
- the heater can now be put into operation for any period of time if the control unit 6 also outputs a corresponding control pulse, which also switches the transistor T2 into the conductive state via the circuit IC1 / 1, which then activates the winding of the relay Rel and the Relay contacts Rel1 and Rel2 close.
- both sub-elements 1a, 1b of the heating element 1 are connected to the operating voltage and current flows through them.
- the circuit IC1 / 2 with peripheral circuitry represents an oscillator whose oscillation frequency can be influenced by a capacitance consisting of at least one partial element 1a, 1b of the heating element 1 on the one hand and, for example, the vehicle mass on the other hand.
- This capacity changes, for example, in that the vehicle seat is occupied by a vehicle passenger.
- the seat capacity can be measured without being disturbed by the heating process, whereby it can be determined whether a seat is occupied or not. If the seat is not occupied, there is no need for heating the seat, so that a further heating process is prevented by not actuating the transistor T2.
- the non-occupancy of the seat is also registered by the Airba control unit 6.
- This information is further processed in such a way that an airbag provided for the passenger side, for example, is not activated if the seat is not occupied.
- this measure also serves to increase the need for security, since it is also possible to detect faulty seating positions which, if the risks are carefully weighed up, should preferably not lead to the deployment of an airbag.
- This circuit also enables the acquisition time of the relay Rel and the detection of errors such as short circuits or wire breaks in the heating circuit.
- FIG. 3 Another exemplary embodiment of the electronic device is shown as a block diagram in FIG. 3 and as a circuit diagram in FIG.
- the control input 9 of the electronic device 4 is connected via a resistor R3 to the control connection of a transistor T2, the source connection of which is connected to ground and the drain connection of the operating voltage and the resistor R4 on the other hand is connected to the control terminal of a second transistor T3.
- the control terminal of transistor T2 is also connected to ground via a capacitor C1.
- the control input of the electronic device 4 is also connected via a resistor R2 to the operating voltage and via a connecting line to the output connection of an oscillator 10, which in turn is connected via a control input 10 ', as also shown in FIG.
- a relay Rel is arranged in the load circuit of the transistor T3, which controls contacts for connecting the heating element 1 (FIG. 3) to the operating voltage source.
- the source terminal of transistor T3 is connected to ground.
- the control terminal of transistor T3 is connected to the drain terminal of a further transistor T4, the source terminal of which is connected to ground.
- the control terminal of the transistor T4 is connected to the output terminal of a temperature regulator 2.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Thermal Sciences (AREA)
- Air Bags (AREA)
- Control Of Resistance Heating (AREA)
Abstract
Appareil électronique (4) destiné à commander le chauffage d'un siège automobile (élément chauffant 1), raccordé à un dispositif de commande de coussin gonflable (airbag) (6), au moyen d'une première entrée de commande (9), et à un thermorégulateur (2) au moyen d'une seconde entrée de commande. L'élément chauffant (1) assure non seulement le chauffage mais permet également de détecter si le siège est occupé ou non.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4498618T DE4498618D2 (de) | 1993-11-10 | 1994-10-27 | Elektronisches Gerät für die Ansteuerung einer Sitzheizung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19934338285 DE4338285A1 (de) | 1993-11-10 | 1993-11-10 | Elektronisches Gerät für die Ansteuerung einer Sitzheizung |
DEP4338285.1 | 1993-11-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1995013204A1 true WO1995013204A1 (fr) | 1995-05-18 |
Family
ID=6502193
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1994/001254 WO1995013204A1 (fr) | 1993-11-10 | 1994-10-27 | Appareil electronique destine a commander un chauffage de siege |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE4338285A1 (fr) |
WO (1) | WO1995013204A1 (fr) |
Cited By (36)
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WO2002006083A1 (fr) * | 2000-07-17 | 2002-01-24 | Kongsberg Automotive Ab | Dispositif de chauffage pour siege automobile |
FR2841841A1 (fr) * | 2002-07-03 | 2004-01-09 | Faurecia Sieges Automobile | Dispositif et procede de chauffe de sieges de vehicule automobile |
US7876106B2 (en) | 2008-04-28 | 2011-01-25 | Delphi Technologies, Inc. | System and method for detecting an object at a location |
US7880480B2 (en) | 2008-04-28 | 2011-02-01 | Delphi Technologies, Inc. | Occupant detection system and method for calibrating |
DE102009055424A1 (de) * | 2009-12-30 | 2011-07-07 | Takata-Petri Ag, 63743 | Kapazitive Sensorbaugruppe |
DE102009055426A1 (de) * | 2009-12-30 | 2011-07-07 | Takata-Petri Ag, 63743 | Kapazitive Sensorbaugruppe |
EP2368771A1 (fr) | 2010-03-25 | 2011-09-28 | Iee International Electronics & Engineering S.A. | Combinaison de chauffage pour siège et de capteur de présence capacitif |
EP2368772A1 (fr) | 2010-03-25 | 2011-09-28 | Iee International Electronics & Engineering S.A. | Chauffage pour siège et capteur de présence capacitif combinés |
US8091960B2 (en) | 2008-05-01 | 2012-01-10 | Delphi Technologies, Inc. | Seat assembly having seat heating and occupant detection |
WO2012080066A1 (fr) | 2010-12-17 | 2012-06-21 | Iee International Electronics & Engineering S.A. | Chauffage de siège utilisable comme électrode d'antenne |
US8219286B2 (en) | 2010-04-28 | 2012-07-10 | Delphi Technologies, Inc. | Noise reduction for occupant detection system and method |
WO2012093080A1 (fr) | 2011-01-07 | 2012-07-12 | Iee International Electronics & Engineering S.A. | Capteur d'occupant capacitif comprenant un réseau résonant |
US8237455B2 (en) | 2008-04-28 | 2012-08-07 | Delphi Technologies, Inc. | Occupant detection system with environmental compensation |
WO2012113795A1 (fr) | 2011-02-21 | 2012-08-30 | Iee International Electronics & Engineering S.A. | Élément chauffant servant d'électrode de détection capacitive |
WO2013007541A1 (fr) | 2011-07-08 | 2013-01-17 | Iee International Electronics & Engineering S.A. | Combinaison d'appareil de chauffage de siège et de détecteur de présence capacitif |
WO2013007540A1 (fr) | 2011-07-08 | 2013-01-17 | Iee International Electronics & Engineering S.A. | Combinaison d'appareil de chauffage de siège et de détecteur de présence capacitif |
EP2548762A1 (fr) | 2011-07-20 | 2013-01-23 | Iee International Electronics & Engineering S.A. | Système de détection de présence capacitif à plusieurs fréquences |
US8400323B2 (en) | 2009-12-21 | 2013-03-19 | Delphi Technologies, Inc. | Capacitive occupant sensing system and method |
EP2572942A1 (fr) | 2011-09-21 | 2013-03-27 | Iee International Electronics & Engineering S.A. | Système de détection capacitif utilisant un élément chauffant comme électrode d'antenne |
EP2572929A1 (fr) | 2011-09-21 | 2013-03-27 | Iee International Electronics & Engineering S.A. | Système de détection capacitif utilisant un élément chauffant comme électrode d'antenne |
EP2572943A1 (fr) | 2011-09-21 | 2013-03-27 | Iee International Electronics & Engineering S.A. | Système combiné de chauffage et de détection capacitive d'occupation de siège |
US8456177B2 (en) | 2009-12-08 | 2013-06-04 | Delphi Technologies, Inc. | System and method of occupant detection with a resonant frequency |
US8500194B2 (en) | 2009-11-20 | 2013-08-06 | Delphi Technologies, Inc. | Seat occupant detection circuit isolation from seat heating circuit using a common mode choke |
WO2014166780A1 (fr) | 2013-04-09 | 2014-10-16 | Iee International Electronics & Engineering S.A. | Dispositif de détection capacitif |
US9126502B2 (en) | 2012-08-14 | 2015-09-08 | Delphi Technologies, Inc. | Dual electrode occupant detection system and method |
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WO2018229172A1 (fr) | 2017-06-15 | 2018-12-20 | Iee International Electronics & Engineering S.A. | Système de détection d'occupant capacitif avec discrimination isofix améliorée |
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DE102012217140A1 (de) | 2012-09-24 | 2014-06-12 | Bayerische Motoren Werke Aktiengesellschaft | Sitzbelegungserkennungsvorrichtung |
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KR102081430B1 (ko) | 2013-05-15 | 2020-02-25 | 젠썸 캐나다 유엘씨 | 콤비네이션 히터 및 센서 |
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Also Published As
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DE4338285A1 (de) | 1995-05-11 |
DE4498618D2 (de) | 1996-11-14 |
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