WO1995013204A1 - Electronic device for controlling a seat-heating system - Google Patents

Electronic device for controlling a seat-heating system Download PDF

Info

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
Application number
PCT/DE1994/001254
Other languages
German (de)
French (fr)
Inventor
Georg Haubner
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to DE4498618T priority Critical patent/DE4498618D2/en
Publication of WO1995013204A1 publication Critical patent/WO1995013204A1/en

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
    • 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.

Abstract

The proposed electronic device (4) for controlling heating in a vehicle seat (heating element 1) is connected via a first control input (9) with an airbag control device (6) and via a second control input to a temperature regulator (2). The heating element (1) in addition to its heating function acts as a sensor to detect seat occupancy.

Description

Elektronisches Gerät für die Ansteuerung einer SitzheizungElectronic device for controlling seat heating
Stand der TechnikState of the art
Die Erfindung betrifft ein elektronisches Gerät für die Ansteuerung einer Sitzheizung nach dem Oberbegriff des Anspruchs 1.The invention relates to an electronic device for controlling a seat heater according to the preamble of claim 1.
Zwecks Erhöhung des Fahrzeugkomforts ist es bekannt, einen Fahrzeug- sitz beheizbar auszugestalten. Er verfügt dazu über eine in die Sitzfläche integrierte Heizwicklung, die gegebenenfalls unter Zwischenschaltung eines Schalters nach Bedarf oder automatisch, in Abhängigkeit von der Temperatur, mit der Batterie des Fahrzeugs verbindbar ist. Der Minuspol der Heizwicklung liegt an Massepoten¬ tial. Der Pluspol liegt in Reihe mit einem Temperaturregler Bei einigen Fahrzeugen ist der Pluspol zusätzlich mit einem Ein-Aus-Schalter versehen.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.
Insbesondere in Verbindung mit Rückhaltemitteln für Fahrzeug¬ insassen, wie zum Beispiel Gurten und/oder Airbag-Systemen, sind weiter Mittel zur Feststellung der Anwesenheit eines Fahrzeug¬ insassen bekannt. Derartige Einrichtungen sind von besonderer Bedeutung bei mit sogenannten passiven Rückhaltemitteln, wie bei¬ spielsweise einem Airbag-System, ausgestatteten Fahrzeugen, die im Gefahrenfall ohne menschliches Zutun aktiviert werden. Eine Akti- vierung ist auch im Gefahrenfall nämlich nur dann notwendig, wenn der betreffende Fahrzeugsitz tatsächlich von einem Fahrzeuginsassen eingenommen ist. Ein überflüssiges Auslösen eines beispielsweise für einen Beifahrer vorgesehenen Airbag-Systems bei leerem Beifahrersitz würde zu erheblichen Kosten im Zusammenhang mit der Wiederinstand¬ setzung der Airbag-Bauelemente führen.Particularly in connection with restraint devices for vehicle occupants, such as, for example, belts and / or airbag systems, means are also known for determining the presence of a vehicle occupant. Devices of this type are of particular importance in vehicles equipped with so-called passive restraint devices, such as an airbag system, which are activated without human intervention in the event of danger. An act In the event of danger, crossing is only necessary if the vehicle seat in question is actually occupied by a vehicle occupant. Unnecessary triggering of an airbag system intended for a passenger, for example, when the front passenger seat is empty, would lead to considerable costs in connection with the repair of the airbag components.
Auch bei einem belegten Fahrzeugsitz können Mittel zur Sitzbele¬ gungserkennung zweckmäßig zur Feststellung dienen, ob der jeweilige Fahrzeuginsasse eine systemgerechte Sitzposition innehat oder nicht. Diese Feststellung kann im Falle eines Unfalls als Entscheidungs- kriterium dafür herangezogen werden, ob ein Airbag-System überhaupt oder gegebenenfalls erst etwas später ausgelöst wird, um eine mög¬ liche Verletzungsgefahr des Fahrzeuginsassen infolge einer falschen Sitzposition zu verhindern oder zumindest zu reduzieren. Schon im Vorfeld einer Unfallsituation könnte jedoch eine falsche Sitz¬ position über geeignete Anzeigemittel, wie beispielsweise eine Warn¬ lampe oder einen Signalgenerator angezeigt werden.Even with an occupied vehicle seat, 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.
Aus US-AI -3 863 209 ist ein Fahrzeugsitz bekannt, der einen in der Sitzfläche angeordneten lastabhängigen Schalter aufweist. Bei Belegung des Sitzes mit einem Fahrzeuginsassen ändert dieser Schalter seinen Schaltzustand und kann beispielsweise einen Strom¬ kreis schließen. Bei diesem Schalter handelt es sich um ein von einer Sitzheizung unabhängiges Bauelement.From US-AI -3 863 209 a vehicle seat is known which has a load-dependent switch arranged in the seat surface. When the seat is occupied by a vehicle occupant, this switch changes its switching state and can, for example, close a circuit. This switch is a component that is independent of seat heating.
Um Personen im Schließbereich von Türen zu erkennen, ist eine kapa¬ zitive Messung mit Oszillatoren aus DE-OS 3044 789 bekannt. Die Person begibt sich zwischen die Kapazitätselektroden eines Luftkon¬ densators und erhöht dadurch die Kapazität des Oszillatorkondensa¬ tors. Die Oszillatorfrequenz nimmt ab.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.
Aus US-AI -4 885 566 ist weiter eine Einrichtung bei einem Fahrzeug bekannt, die es ermöglicht, das Anlegen eines Sicherheitsgurts zu überprüfen. Diese Einrichtung sieht eine Sitzelektrode und eine bzw. zwei Gurtelektroden vor. Ein belegter Sitz wird durch Kapazitäts- erhδhung zwischen Sitzelektrode und Gurtelektrode bzw. Kapazitäts- erhöhung zwischen den beiden Gurtelektroden erkannt. Die Schwin¬ gungsfrequenz des Schwingkreises ist von der Sitzbelegung durch einen Fahrzeuginsassen abhängig. Auch bei dieser bekannten Einrichtung ist die in dem Fahrzeugsitz angeordnete Elektrode kein Bestandteil einer Sitzheizung.From US-AI -4 885 566 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. In this known device, too, the electrode arranged in the vehicle seat is not part of a seat heater.
Aus DE 36 35 644 C2 ist eine Sitzelektrode bekannt, die mit der Fahrzeugkarosserie als Gegenelektrode (•= Masse) einen Kondensator darstellt. Der Kondensator erhöht durch einen Beifahrer seine Kapazität. Der Oszillator erniedrigt bei belegtem Sitz seine Frequenz. Es ist ein Zähler-Speicher vorgesehen, der während einer festen Zeit von 0.1 sek die Oszillatorimpulse zählt und über den Speicher seriell an den Mikrocomputer weitergibt. Es wird nicht die absolute Kapazität, sondern deren momentane Änderung ausgewertet.From DE 36 35 644 C2 a seat electrode is known which, together with the vehicle body as a counter electrode (• = ground), represents a capacitor. The capacitor increases its capacity through a passenger. When the seat is occupied, 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.
Aus DE 41 10 702 AI ist weiter ein Fahrzeugsitz mit Sitzheizung bekannt, bei dem die Sitzheizung in Doppelfunktion als Sensor für eine Sitzbelegungserkennungsschaltung dient.From DE 41 10 702 AI 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.
Vorteile der ErfindungAdvantages of the invention
Das elektronische Gerät mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber zahlreiche Vorteile. Dadurch, daß zumindest Teile einer bereits vorhandenen Sitzheizung als Mittel zur Erkennung der Sitzbelegung dienen, läßt sich ein besonders einfacher und damit auch preiswerter konstruktiver Aufbau eines Fahrzeugsitzes realisieren. Das elektronisches Gerät bietet weiterhin den Vorteil, daß das Heizelement und die das Heizelement mit dem elektronischen Gerät, bzw. der Stromquelle verbindende Relaisschaltung auf Fehler überwacht werden können; insbesondere ist auch eine Erfassung der Anzugszeit des Relais möglich. Das Gerät ermöglicht weiterhin die Zuschaltung der Sitzheizung und deren Betrieb über eine beliebige Zeitdauer sowie die Frequenzmessung eines Oszillators, dessen Schwingfrequenz von dem Heizelement beeinflußt wird. Dadurch ist auf einfache Weise die Feststellung möglich, ob der Fahrzeugsitz von einem Fahrzeuginsassen besetzt ist oder nicht. Alle diese viel¬ fältigen Steuerungsfunktionen werden mit nur einer einzigen Ver¬ bindungsleitung ermöglicht, die das elektronische Gerät mit einem zentralen Steuergerät (Airbag-Steuergerät) verbindet.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).
Zeichnungdrawing
Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Figur 1 zeigt dabei das Blockschaltbild einer Anlage, die das Heizelement der Sitzheizung, ein elektronisches Gerät, einen Temperaturregler und ein zentrales Steuergerät umfaßt; Figur 2 zeigt den Stromlaufplan eines ersten Ausführungsbeispiels des elektronischen Geräts; Figur 3 zeigt in Gestalt eines Blockschaltbildes ein zweites Ausführungs- beispiel und Figur 4 zeigt den Stromlaufplan des zweiten Aus- führungsbeispiels eines elektronischen Gerätes.Embodiments of the invention are shown in the drawing and explained in more detail in the following description. 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.
Beschreibung der AusführungsbeispieleDescription of the embodiments
In Figur 1 ist mit Bezugsziffer 1 das Heizelement einer elektrischen Sitzheizung bezeichnet, das über von einem elektronischen Gerät 4 steuerbare Kontakte, insbesondere Relaiskontakte 3, bei belegtem Sitz an Spannung liegt. Das Zu- und Abschalten des Heizelements 1 erfolgt auf den Steuerbefehl eines mit dem elektronischen Gerät 4 verbundenen Temperaturreglers 2. Das Heizelement 1 liegt, vorzugs¬ weise mit einem Abgriff 5, an einem Anschluß des elektronischen Gerätes 4. Das elektronische Gerät 4 ist weiterhin über eine Leitung 9 mit dem Airbagsteuergerät 6 verbunden. Bei Beginn einer durch den Temperaturregler 2 angeforderten Heizphase schaltet das elektro¬ nische Gerät 4 zwecks Ermittlung einer Sitzbelegung kurzzeitig über die Kontakte 3 das Heizelement ab und mißt die Frequenz eines Oszillators, dessen Schwingungsfrequenz von dem Heizelement 1 beeinflußt ist. Ein wiederholtes Zuschalten des Heizelements 1 vermittels der Kontakte 3 erfolgt nur, wenn die Messung ergeben hat, daß der Sitz belegt ist.In FIG. 1, 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. When a heating phase requested by the temperature controller 2 begins, 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.
In Figur 2 ist der Stromlaufplan eines ersten Ausführungsbeispiels des elektronischen Geräts dargestellt. Mit Bezugsziffer 1 ist ein Heizelement für die Sitzheizung eines Fahrzeugs bezeichnet, das in zwei Teilelemente 1a, 1b unterteilt ist. Ein Endanschluß des Teil¬ elements 1b ist mit dem Masseanschluß verbunden, während der andere Endanschluß des Teilelements 1b an einen ersten Relaiskontakt Rel1 geführt ist, dessen anderer Anschluß mit dem ersten Endstück des zweiten Teilements 1a verbunden ist. Der zweite Anschluß des Teilelements 1a schließlich ist einerseits an einen ersten Relais- kontakt Rel2 gelegt, dessen anderer Anschluß an dem positiven Betriebsspannungsanschluß ÜB liegt. Andererseits ist der erste Relaiskontakt von Rel2 über einen Widerstand R17 mit dem invertie¬ renden Eingangsanschluß eines Schaltkreises (Operationsverstärker) IC1/2 verbunden. Der invertierende Eingangsanschluß liegt weiterhin über einen Kondensator C4 und eine Diode D6 an Masse und anderer¬ seits über eine Diode D5 an der Betriebsspannung U1. Weiterhin ist der invertierende Eingangsanschluß über den Widerstand R14 mit dem Ausgangsanschluß des Schaltkreises IC1/2 verbunden. Der nicht- invertierende Eingangsanschluß dieses Schaltkreises ist seinerseits über einen Widerstand R16 mit dem Masseanschluß, über einen Wider¬ stand R15 mit dem Betriebsspannungsanschluß U1 und schließlich über einen weiteren Widerstand R13 mit dem Ausgangsanschluß des Schalt¬ kreises IC1/2 verbunden. Weiterhin liegt der Ausgangsanschluß des Schaltkreises IC1/2 über einen Widerstand R12 an der Betriebs¬ spannung U1. Weiterhin ist der Ausgangsanschluß des Schaltkreises IC1/2 über einen Widerstand R9 mit dem Gate-Anschluß eines Transistors T1 verbunden, dessen Source-Anschluß an Masse liegt und dessen Drain-Anschluß an die Verbindungsstelle von zwei Widerständen R2, R3 geführt ist. Diese Verbindungsstelle liegt andererseits über eine Zenerdiode D1 an Masse. Der andere Anschluß des Widerstands R2 liegt über einen weiteren Widerstand R1 an der Betriebsspannung U1 und andererseits an einem Anschluß des Airbag-Steuergerätes 6. Der andere Anschluß des Widerstands R3 führt zu dem invertierenden Eingangsanschluß eines Schaltkreises IC 1/1 , der weiterhin über einen Kondensator C1 an Masse liegt. Der nichtinvertierende Eingangsanschluß des Schaltkreises IC 1/1 ist einerseits über einen Widerstand R4 mit dem Masseanschluß, andererseits über den Wider¬ stand R5 mit dem Betriebsspannungsanschluß U1 und schließlich über einen Widerstand R6 mit dem Ausgangsanschluß des Schaltkreises IC 1/1 verbunden. Dieser Aus angsanschluß ist ebenfalls über einen Widerstand R7 mit dem Betriebsspannungsanschluß U1 verbunden. Weiterhin führt der Ausgangsanschluß des Schaltkreises IC 1/1 an den Gate-Anschluß eines zweiten Transistors T2, dessen Source-Anschluß mit dem Drain-Anschluß eines dritten Transistors T3 verbunden ist. Der Source-Anschluß dieses dritten Transistors T3 ist mit Masse verbunden, während sein Gate-Anschluß einerseits über eine Zener¬ diode D7 an Masse liegt und andererseits über einen Widerstand R11 mit einem Anschluß eines Temperaturreglers 2 verbunden ist. Der Anschluß des Temperaturreglers 2 liegt weiterhin über einen Wider¬ stand R10 an Masse. Im Drain-Kreis des Transistors T2 liegt eine Wicklung eines Relais Rel, der eine Diode D2 parallel geschaltet ist. Der dem Transistor T2 fernliegende Anschluß der Relaiswicklung liegt über eine Diode 3 an der positiven Betriebsspannungsquelle ÜB, die wiederum über einen Kondensator C2 an Masse gelegt ist. Der Verbindungspunkt zwischen der Diode D3 und der Relaiswicklung liegt über einen Widerstand R8 an dem Betriebsspannungsanschluß U1 , der wiederum über eine Zenerdiode D4 einerseits und einen Kondensator C3 andererseits mit dem Masseanschluß verbunden ist.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. Finally, 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. On the other hand, 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. Furthermore, 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. Furthermore, the output connection of the Circuit IC1 / 2 via a resistor R12 to the operating voltage U1. Furthermore, 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. On the other hand, 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. Furthermore, 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.
Sofern ein Heizleistungsbedarf beispielsweise durch einen mit dem Temperaturregler 2 in Wirkverbindung stehenden Temperatursensor festgestellt wird, steuert der Temperaturregler 2 über den Wider¬ stand R11 den Transistor T3 in den leitenden Zustand. Die Heizung kann nun für eine beliebige Zeitdauer in Betrieb gesetzt werden, wenn auch das Steuergerät 6 einen entsprechenden AnSteuerimpuls ausgibt, der über den Schaltkreis IC1/1 auch den Transistor T2 in den leitenden Zustand versetzt, der daraufhin die Wicklung des Relais Rel aktiviert und die Relaiskontakte Rel1 und Rel2 schließt. Dadurch werden beide Teilelemente 1a, 1b des Heizelementes 1 an die Betriebsspannung gelegt und von Strom durchflössen. Der Schaltkreis IC1/2 mit Peripheriebeschaltung stellt einen Oszillator dar, dessen Schwingungsfrequenz von einer Kapazität beeinflußbar ist, die aus mindestens einem Teilelement 1a, 1b des Heizelements 1 einerseits und beispielsweise der Fahrzeugmasse andererseits besteht. Diese Kapazität ändert sich beispielsweise dadurch, daß der Fahrzeugsitz von einem Fahrzeugpassagier besetzt wird. Durch kurzzeitiges Auf¬ trennen des Heiz-Kreises mittels der Relaiskontakte Rell und Rel2 kann eine vom Heizvorgang ungestörte Messung der Sitzkapazität erfolgen, wodurch feststellbar ist, ob ein Sitz besetzt ist oder nicht. Falls der Sitz nicht besetzt ist, besteht keine Notwendigkeit für die Heizung des Sitzes, so daß durch Nichtansteuerung des Transistors T2 ein weiterer Heizvorgang unterbunden wird. Zugleich wird die Nichtbelegung des Sitzes auch von dem Airba -Steuergerät 6 registriert. Diese Information wird dahingehend weiterverarbeitet, daß ein beispielsweise für die Beifahrerseite vorgesehener Airbag im Falle der Nichtbelegung des Sitzes nicht aktiviert wird. Zugleich dient diese Maßnahme auch einem verstärkten Sicherungsbedürfnis, da auch fehlerhafte Sitzpositionen feststellbar sind, die bei sorg¬ fältiger Abwägung der Risiken vorzugsweise nicht zu der Auslösung eines Airbags führen sollten. Diese Schaltung ermöglicht weiterhin, die Erfassung der Anzugszeit des Relais Rel und die Feststellung von Fehlern wie beispielsweise Kurzschlüssen oder Leitungsuhterbrechungen im Heizkreis.If 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. As a result, 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. By briefly disconnecting the heating circuit by means of the relay contacts Rell and Rel2, 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. At the same time, 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. At the same time, 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.
Ein weiteres Ausführungsbeispiel des elektronischen Geräts ist als Blockschaltbild in Figur 3 und als Stromlaufplan in Figur 4 dar¬ gestellt. Bei dem Ausführungsbeispiel gemäß Figur 4 ist der Steuer¬ eingang 9 des elektronischen Gerätes 4 über einen Widerstand R3 mit dem Steueranschluß eines Transistors T2 verbunden, dessen Source-An- schluß an Masse liegt und dessen Drain-Anschluß einerseits über einen Widerstand R4 an Betriebsspannung und andererseits an dem Steueranschluß eines zweiten Transistors T3 liegt. Der Steuer¬ anschluß des Transistors T2 ist weiterhin über einen Kondensator C1 mit Masse verbunden. Der Steuereingang des elektronischen Gerätes 4 ist weiterhin über einen Widerstand R2 mit der Betriebsspannung und über eine Verbindungsleitung mit dem Ausgangsanschluß eines Oszillators 10 verbunden, der wiederum über einen Steuereingang 10', wie auch in Figur 3 dargestellt, zumindest mit einem Teil des Heizelementes 1, 1a, 1b verbunden ist. Im Lastkreis des Transistors T3 ist ein Relais Rel angeordnet, das Kontakte zur Verbindung des Heizelements 1 (Figur 3) mit der Betriebsspannungsquelle steuert. Der Source-Anschluß des Transistors T3 ist mit Masse verbunden. Der Steueranschluß des Transistors T3 ist mit dem Drain-Anschluß eines weiteren Transistors T4 verbunden, dessen Source-Anschluß an Masse liegt. Der Steueranschluß des Transistors T4 ist mit dem Ausgangsanschluß eines Temperataurreglers 2 verbunden. Another exemplary embodiment of the electronic device is shown as a block diagram in FIG. 3 and as a circuit diagram in FIG. In the exemplary embodiment according to FIG. 4, 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. 3, to at least part of the heating element 1, 1a, 1b is connected. 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.

Claims

Ansprüche Expectations
1. Elektronisches Gerät für die Ansteuerung der Heizung eines Fahrzeugsitzes mit einem Heizelement und Schaltmitteln zur Verbindung des Heizelementes mit einer Spannungsquelle, bei dem das Heizelement zugleich als Sensor für eine Sitzbelegungserkennung dient, mit einem Oszillator, dessen Schwingungsfrequenz von dem Heizelement beeinflußbar ist, dadurch gekennzeichnet, daß das elektronische Gerät (4) einen Steueranschluß (9) aufweist, über den es mit einem Airbag-Steuergerät (6) verbindbar ist und daß über diesen Steuergang einerseits das Heizelement (1, 1a, 1b) an die Betriebsspannungsquelle (ÜB) schaltbar und andererseits der Schwingungszustand des Oszillators (10) erfaßbar ist.1. Electronic device for controlling the heating of a vehicle seat with a heating element and switching means for connecting the heating element to a voltage source, in which the heating element also serves as a sensor for seat occupancy detection, with an oscillator, the oscillation frequency of which can be influenced by the heating element, characterized that the electronic device (4) has a control connection (9) via which it can be connected to an airbag control unit (6) and that the heating element (1, 1a, 1b) can be switched to the operating voltage source (ÜB) via this control gear and on the other hand the oscillation state of the oscillator (10) can be detected.
2. Elektronisches Gerät nach Anspruch 1, dadurch gekennzeichnet, daß der Steuereingang (9) des elektronischen Gerätes (4) über eine Serienschaltung von Widerständen (R2, R3) mit dem invertierenden Eingangsanschluß eines ersten integrierten Schaltkreises (IC1/1) verbunden ist, dessen Ausgangsanschluß mit dem Steueranschluß eines ein Relais (Rel) steuernden Transistors (T2) verbunden ist.2. Electronic device according to claim 1, characterized in that the control input (9) of the electronic device (4) is connected via a series circuit of resistors (R2, R3) to the inverting input terminal of a first integrated circuit (IC1 / 1), the Output connection is connected to the control connection of a transistor (T2) controlling a relay (Rel).
3. Elektronisches Gerät nach einem der Ansprüche 1, 2, dadurch gekennzeichnet, daß in Serie zu dem Transistor (T2) ein weiterer - O -3. Electronic device according to one of claims 1, 2, characterized in that in series with the transistor (T2) another - O -
Transistor (T3) geschaltet ist, dessen Steueranschluß mit dem Aus angsanschluß eines Temperaturreglers (2) verbunden ist.Transistor (T3) is connected, the control terminal of which is connected to the output terminal of a temperature controller (2).
4. Elektronisches Gerät nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Aus angsanschluß des Oszillators (10) mit dem Steueranschluß eines Transistors (Tl ) verbunden ist, dessen Drainanschluß an den Verbindungspunkt der Widerstände (R2, R3) geführt ist.4. Electronic device according to one of claims 1 to 3, characterized in that the output terminal of the oscillator (10) is connected to the control terminal of a transistor (Tl), the drain terminal of which is led to the connection point of the resistors (R2, R3).
5. Elektronisches Gerät nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Oszillator (10) einen elektronischen Schaltkreis (IC1/2) umfaßt, dessen invertierender Eingangsanschluß mit dem Heizelement (1) verbunden ist. 5. Electronic device according to one of claims 1 to 4, characterized in that the oscillator (10) comprises an electronic circuit (IC1 / 2) whose inverting input terminal is connected to the heating element (1).
PCT/DE1994/001254 1993-11-10 1994-10-27 Electronic device for controlling a seat-heating system WO1995013204A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4498618T DE4498618D2 (en) 1993-11-10 1994-10-27 Electronic device for controlling seat heating

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4338285.1 1993-11-10
DE19934338285 DE4338285A1 (en) 1993-11-10 1993-11-10 Electronic device for controlling seat heating

Publications (1)

Publication Number Publication Date
WO1995013204A1 true WO1995013204A1 (en) 1995-05-18

Family

ID=6502193

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1994/001254 WO1995013204A1 (en) 1993-11-10 1994-10-27 Electronic device for controlling a seat-heating system

Country Status (2)

Country Link
DE (2) DE4338285A1 (en)
WO (1) WO1995013204A1 (en)

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002006083A1 (en) * 2000-07-17 2002-01-24 Kongsberg Automotive Ab Vehicle seat heating arrangement
FR2841841A1 (en) * 2002-07-03 2004-01-09 Faurecia Sieges Automobile DEVICE AND METHOD FOR HEATING SEATS OF A MOTOR VEHICLE
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 (en) * 2009-12-30 2011-07-07 Takata-Petri Ag, 63743 Capacitive sensor module
DE102009055426A1 (en) * 2009-12-30 2011-07-07 Takata-Petri Ag, 63743 Capacitive sensor module
EP2368771A1 (en) 2010-03-25 2011-09-28 Iee International Electronics & Engineering S.A. Seat heater and capacitive occupancy sensor combination
EP2368772A1 (en) 2010-03-25 2011-09-28 Iee International Electronics & Engineering S.A. Combined seat heater and capacitive occupancy sensor
US8091960B2 (en) 2008-05-01 2012-01-10 Delphi Technologies, Inc. Seat assembly having seat heating and occupant detection
WO2012080066A1 (en) 2010-12-17 2012-06-21 Iee International Electronics & Engineering S.A. Seat heater usable as antenna electrode
US8219286B2 (en) 2010-04-28 2012-07-10 Delphi Technologies, Inc. Noise reduction for occupant detection system and method
WO2012093080A1 (en) 2011-01-07 2012-07-12 Iee International Electronics & Engineering S.A. Capacitive occupant sensor including resonant network
US8237455B2 (en) 2008-04-28 2012-08-07 Delphi Technologies, Inc. Occupant detection system with environmental compensation
WO2012113795A1 (en) 2011-02-21 2012-08-30 Iee International Electronics & Engineering S.A. Heating element operated as capacitive sensing electrode
WO2013007541A1 (en) 2011-07-08 2013-01-17 Iee International Electronics & Engineering S.A. Seat heater and capacitive occupancy sensor combination
WO2013007540A1 (en) 2011-07-08 2013-01-17 Iee International Electronics & Engineering S.A. Seat heater and capacitive occupancy sensor combination
EP2548762A1 (en) 2011-07-20 2013-01-23 Iee International Electronics & Engineering S.A. Plural-frequency capacitive occupancy sensing system
US8400323B2 (en) 2009-12-21 2013-03-19 Delphi Technologies, Inc. Capacitive occupant sensing system and method
EP2572929A1 (en) 2011-09-21 2013-03-27 Iee International Electronics & Engineering S.A. Capacitive sensing system using a heating element as antenna electrode
EP2572942A1 (en) 2011-09-21 2013-03-27 Iee International Electronics & Engineering S.A. Capacitive sensing system using heating element as antenna electrode
EP2572943A1 (en) 2011-09-21 2013-03-27 Iee International Electronics & Engineering S.A. Combined heating and capacitive seat occupant sensing system
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 (en) 2013-04-09 2014-10-16 Iee International Electronics & Engineering S.A. Capacitive sensing device
US9126502B2 (en) 2012-08-14 2015-09-08 Delphi Technologies, Inc. Dual electrode occupant detection system and method
WO2016055667A1 (en) 2014-10-10 2016-04-14 Iee International Electronics & Engineering S.A. Capacitive sensing device
US9650064B2 (en) 2011-03-15 2017-05-16 Takata AG Occupancy detection device for detecting occupancy of a seat in a motor vehicle
DE112016005110T5 (en) 2015-11-06 2018-08-02 Iee International Electronics & Engineering S.A. Optimized electrode shape for a capacitive occupant classification system
WO2018141773A1 (en) 2017-01-31 2018-08-09 Iee International Electronics & Engineering S.A. Robust, low-cost capacitive measurement system
DE112016005734T5 (en) 2015-12-15 2018-10-04 Iee International Electronics & Engineering S.A. Capacitive occupant detection system with Isofix distinction
WO2018229263A1 (en) 2017-06-15 2018-12-20 Iee International Electronics & Engineering S.A. Capacitive occupant detection system with improved discrimination capability
WO2018229172A1 (en) 2017-06-15 2018-12-20 Iee International Electronics & Engineering S.A. Capacitive occupant detection system with improved isofix discrimination
CN109996701A (en) * 2016-11-25 2019-07-09 奥迪股份公司 The equipment of the normal wearing state of safety belt for identification
WO2022096672A1 (en) 2020-11-06 2022-05-12 Iee International Electronics & Engineering S.A. Method of Furnishing Three-Dimensional Objects with Electrically Conductive Structures having Low Topography and Low Surface Roughness
LU102265B1 (en) 2020-12-03 2022-06-03 Iee Sa Method of Furnishing Three-Dimensional Objects with Electrically Conductive Structures having Low Topography and Low Surface Roughness
DE112014001890B4 (en) 2013-04-09 2022-07-21 Iee International Electronics & Engineering S.A. Capacitive sensing device

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29500749U1 (en) * 1995-01-18 1996-05-15 Peters Rolf Seat sensor and device with a seat sensor and an evaluation unit
DE19547333A1 (en) * 1995-12-19 1997-06-26 Telefunken Microelectron Occupant protection system for vehicle used for conveying people
DE19606526B4 (en) * 1996-02-22 2004-11-11 Conti Temic Microelectronic Gmbh Method for determining the resistance value of a resistor arrangement
DE19609644A1 (en) * 1996-03-12 1997-09-18 Cherry Mikroschalter Gmbh Locking mechanism with control function
DE19701958C2 (en) * 1997-01-22 2003-10-30 Valeo Schalter & Sensoren Gmbh Power stage operated at a higher frequency for a seat heating circuit
DE19717273C1 (en) * 1997-04-24 1998-07-30 Volkswagen Ag Foil pressure sensor for seat occupancy determination in motor vehicle
DE29708959U1 (en) * 1997-05-21 1997-07-24 Siemens Ag Motor vehicle seat
DE19722085A1 (en) * 1997-05-27 1998-12-03 Volkswagen Ag Method and device for seat occupancy detection in a motor vehicle
DE19741451B4 (en) * 1997-09-19 2005-07-21 Volkswagen Ag Method and device for seat occupancy recognition of a vehicle seat
DE19852541C1 (en) * 1998-11-05 2000-03-23 Brose Fahrzeugteile Method and device for identifying occupancy of a motor vehicle seat activates an electrical driving mechanism to trigger an adjustment device for disengaging if it identifies an unoccupied seat.
DE10009128C1 (en) * 2000-02-26 2001-08-16 Wet Automotive Systems Ag Device for aerating a vehicle seat has one or more fans fitted in a vehicle seat to be controlled by a central seat control transmitting control signals through a data line to control electronics in a fan casing
DE10026656A1 (en) * 2000-05-29 2001-12-13 Siemens Ag Climate conditioner for a motor vehicle seat has built in sensors and control unit for seat temperature elements
US20040173028A1 (en) * 2001-04-27 2004-09-09 Robert Rix Electroconductive textile sensor
DE10254622A1 (en) * 2002-11-22 2004-09-02 Hueck Folien Gesellschaft M.B.H. Heavy duty, durable, flexible film
DE10311132A1 (en) * 2003-03-12 2004-09-23 Continental Teves Ag & Co. Ohg Occupant sensor for motor vehicle seat airbag uses heating wire for seat heater as sensing electrode for passenger
US7521940B2 (en) 2006-01-26 2009-04-21 Tk Holdings Inc. Capacitive sensing isolation using reversed biased diodes
DE102006031899B3 (en) * 2006-04-20 2007-06-21 W.E.T. Automotive Systems Ag Interior component e.g. seat, surface air conditioning system for motor vehicle, has coating layer that is connected with air conditioning layer such that insertion case is formed, and detector device that is inserted into case
DE102006034466B4 (en) * 2006-07-26 2008-11-13 Audi Ag motor vehicle
DE102007045344A1 (en) 2007-09-22 2009-04-02 Daimler Ag Controller for operating electrical load of vehicle, has fuse element provided for interrupting voltage supply units during short-circuit, and two transistors designed as bipolar transistor or FET
DE102008005387B4 (en) * 2007-12-14 2014-03-06 W.E.T. Automotive Systems Ag Detector device with sensor string
DE102009016965B4 (en) 2008-04-11 2022-07-28 Volkswagen Ag Flexible fabric, seat device with heating and seat occupancy detection and method for operating a flexible fabric
DE102010053435A1 (en) * 2009-12-07 2011-06-09 Hirschmann Automotive Gmbh Method for capacitive seat occupancy detection
DE102012217140A1 (en) 2012-09-24 2014-06-12 Bayerische Motoren Werke Aktiengesellschaft Seat occupancy detection device
DE102012223342A1 (en) * 2012-12-17 2014-07-03 Bayerische Motoren Werke Aktiengesellschaft Device for recognizing occupancy of seat by person using seat heater in motor car, has processing unit recognizing seat occupancy based on characteristics of electric current and voltage through and at heating element
WO2014184743A1 (en) 2013-05-15 2014-11-20 Gentherm Canada Ltd. Conductive heater having sensing capabilities
DE102018115214A1 (en) * 2018-06-25 2020-01-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Electrical circuit, method for an electrical circuit and computer program

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9111479U1 (en) * 1991-09-14 1991-11-14 F + G Megamos Sicherheitselektronik Gmbh, 5250 Engelskirchen, De
DE4110936A1 (en) * 1991-04-02 1992-10-08 Megamos F & G Sicherheit Vehicle seat occupation detecting circuit - has electrodes in seat back or squab and device for measuring capacitance between them

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4110936A1 (en) * 1991-04-02 1992-10-08 Megamos F & G Sicherheit Vehicle seat occupation detecting circuit - has electrodes in seat back or squab and device for measuring capacitance between them
DE9111479U1 (en) * 1991-09-14 1991-11-14 F + G Megamos Sicherheitselektronik Gmbh, 5250 Engelskirchen, De

Cited By (67)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002006083A1 (en) * 2000-07-17 2002-01-24 Kongsberg Automotive Ab Vehicle seat heating arrangement
US7134715B1 (en) 2000-07-17 2006-11-14 Kongsberg Automotive Ab Vehicle seat heating arrangement
FR2841841A1 (en) * 2002-07-03 2004-01-09 Faurecia Sieges Automobile DEVICE AND METHOD FOR HEATING SEATS OF A MOTOR VEHICLE
US6812431B2 (en) 2002-07-03 2004-11-02 Faurecia Sieges D'automobile S.A. Apparatus and a method for heating motor vehicle seats
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
US8237455B2 (en) 2008-04-28 2012-08-07 Delphi Technologies, Inc. Occupant detection system with environmental compensation
US8091960B2 (en) 2008-05-01 2012-01-10 Delphi Technologies, Inc. Seat assembly having seat heating and occupant detection
US8154394B2 (en) 2008-05-01 2012-04-10 Delphi Technologies, Inc. Occupant seat detection system and method
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
US8456177B2 (en) 2009-12-08 2013-06-04 Delphi Technologies, Inc. System and method of occupant detection with a resonant frequency
US8400323B2 (en) 2009-12-21 2013-03-19 Delphi Technologies, Inc. Capacitive occupant sensing system and method
DE102009055424A1 (en) * 2009-12-30 2011-07-07 Takata-Petri Ag, 63743 Capacitive sensor module
DE102009055426A1 (en) * 2009-12-30 2011-07-07 Takata-Petri Ag, 63743 Capacitive sensor module
US8970231B2 (en) 2009-12-30 2015-03-03 Takata AG Capacitive sensor assembly
US8970232B2 (en) 2009-12-30 2015-03-03 Takata AG Capacitive sensor assembly
EP2368771A1 (en) 2010-03-25 2011-09-28 Iee International Electronics & Engineering S.A. Seat heater and capacitive occupancy sensor combination
WO2011117237A1 (en) 2010-03-25 2011-09-29 Iee International Electronics & Engineering S.A. Combined seat heater and capacitive occupancy sensor
DE112011101042B4 (en) * 2010-03-25 2020-09-17 Iee International Electronics & Engineering S.A. Combination of seat heating and capacitive occupancy sensor
DE112011101042T5 (en) 2010-03-25 2013-01-10 Iee International Electronics & Engineering S.A. Combination of seat heating and capacitive occupancy sensor
DE112011101041T5 (en) 2010-03-25 2013-01-10 Iee International Electronics & Engineering S.A. Seat heating and capacitive occupancy sensor in combination
DE112011101041B4 (en) * 2010-03-25 2020-09-17 Iee International Electronics & Engineering S.A. Seat heating and capacitive occupancy sensor in combination
US8729430B2 (en) 2010-03-25 2014-05-20 Iee International Electronics & Engineering S.A. Seat heater and capacitive occupancy sensor combination
EP2368772A1 (en) 2010-03-25 2011-09-28 Iee International Electronics & Engineering S.A. Combined seat heater and capacitive occupancy sensor
US9006618B2 (en) 2010-03-25 2015-04-14 Iee International Electronics & Engineering S.A. Combined seat heater and capacitive occupancy sensor
WO2011117238A1 (en) 2010-03-25 2011-09-29 Iee International Electronics & Engineering S.A. Seat heater and capacitive occupancy sensor combination
US8219286B2 (en) 2010-04-28 2012-07-10 Delphi Technologies, Inc. Noise reduction for occupant detection system and method
WO2012080066A1 (en) 2010-12-17 2012-06-21 Iee International Electronics & Engineering S.A. Seat heater usable as antenna electrode
DE112011104407T5 (en) 2010-12-17 2013-09-19 Iee International Electronics & Engineering S.A. Seat heating, usable as antenna electrode
US9764669B2 (en) 2010-12-17 2017-09-19 Iee International Electronics & Engineering S.A. Seat heater usable as antenna electrode
WO2012093080A1 (en) 2011-01-07 2012-07-12 Iee International Electronics & Engineering S.A. Capacitive occupant sensor including resonant network
US9061641B2 (en) 2011-01-07 2015-06-23 Iee International Electronics & Engineering S.A. Capacitive sensor including resonant network
DE112012000923T5 (en) 2011-02-21 2013-11-28 Iee International Electronics & Engineering S.A. As a capacitive detection electrode operated heating element
DE112012000923B4 (en) * 2011-02-21 2021-06-24 Iee International Electronics & Engineering S.A. Heating element operated as a capacitive detection electrode
WO2012113795A1 (en) 2011-02-21 2012-08-30 Iee International Electronics & Engineering S.A. Heating element operated as capacitive sensing electrode
US9656575B2 (en) 2011-02-21 2017-05-23 IEE International Elecrtonics & Engineering S.A. Heating element operated as capacitive sensing electrode
US9650064B2 (en) 2011-03-15 2017-05-16 Takata AG Occupancy detection device for detecting occupancy of a seat in a motor vehicle
US9332592B2 (en) 2011-07-08 2016-05-03 Iee International Electronics & Engineering S.A. Seat heater and capacitive occupancy sensor combination
WO2013007541A1 (en) 2011-07-08 2013-01-17 Iee International Electronics & Engineering S.A. Seat heater and capacitive occupancy sensor combination
WO2013007540A1 (en) 2011-07-08 2013-01-17 Iee International Electronics & Engineering S.A. Seat heater and capacitive occupancy sensor combination
US8994385B2 (en) 2011-07-20 2015-03-31 Iee International Electronics & Engineering S.A. Plural-frequency capacitive occupancy sensing system
EP2548762A1 (en) 2011-07-20 2013-01-23 Iee International Electronics & Engineering S.A. Plural-frequency capacitive occupancy sensing system
US9132850B2 (en) 2011-09-21 2015-09-15 Iee International Electronics & Engineering S.A. Capacitive sensing system configured for using heating element as antenna electrode
US10118522B2 (en) 2011-09-21 2018-11-06 Iee International Electronics & Engineering S.A. Combined heating and capacitive seat occupant sensing system
US9000331B2 (en) 2011-09-21 2015-04-07 Iee International Electronics & Engineering S.A. Capacitive sensing system able of using heating element as antenna electrode
EP2572929A1 (en) 2011-09-21 2013-03-27 Iee International Electronics & Engineering S.A. Capacitive sensing system using a heating element as antenna electrode
EP2572943A1 (en) 2011-09-21 2013-03-27 Iee International Electronics & Engineering S.A. Combined heating and capacitive seat occupant sensing system
EP2572942A1 (en) 2011-09-21 2013-03-27 Iee International Electronics & Engineering S.A. Capacitive sensing system using heating element as antenna electrode
US9126502B2 (en) 2012-08-14 2015-09-08 Delphi Technologies, Inc. Dual electrode occupant detection system and method
DE112014001880B4 (en) 2013-04-09 2022-07-07 Iee International Electronics & Engineering S.A. Capacitive sensing device
DE112014001890B4 (en) 2013-04-09 2022-07-21 Iee International Electronics & Engineering S.A. Capacitive sensing device
WO2014166780A1 (en) 2013-04-09 2014-10-16 Iee International Electronics & Engineering S.A. Capacitive sensing device
US10065590B2 (en) 2014-10-10 2018-09-04 Iee International Electronics & Engineering S.A. Capacitive sensing device
WO2016055667A1 (en) 2014-10-10 2016-04-14 Iee International Electronics & Engineering S.A. Capacitive sensing device
DE112016005110T5 (en) 2015-11-06 2018-08-02 Iee International Electronics & Engineering S.A. Optimized electrode shape for a capacitive occupant classification system
DE112016005734T5 (en) 2015-12-15 2018-10-04 Iee International Electronics & Engineering S.A. Capacitive occupant detection system with Isofix distinction
CN109996701A (en) * 2016-11-25 2019-07-09 奥迪股份公司 The equipment of the normal wearing state of safety belt for identification
DE112018000249T5 (en) 2017-01-31 2019-09-12 Iee International Electronics & Engineering S.A. Robust, cost-effective capacitive measuring system
US11193797B2 (en) 2017-01-31 2021-12-07 Iee International Electronics & Engineering S.A. Robust, low-cost capacitive measurement system
WO2018141773A1 (en) 2017-01-31 2018-08-09 Iee International Electronics & Engineering S.A. Robust, low-cost capacitive measurement system
US10946769B2 (en) 2017-06-15 2021-03-16 Iee International Electronics & Engineering S.A. Capacitive occupant detection system with improved discrimination capability
WO2018229172A1 (en) 2017-06-15 2018-12-20 Iee International Electronics & Engineering S.A. Capacitive occupant detection system with improved isofix discrimination
US11214172B2 (en) 2017-06-15 2022-01-04 Iee International Electronics & Engineeering S.A. Capacitive occupant detection system with improved isofix discrimination
WO2018229263A1 (en) 2017-06-15 2018-12-20 Iee International Electronics & Engineering S.A. Capacitive occupant detection system with improved discrimination capability
WO2022096672A1 (en) 2020-11-06 2022-05-12 Iee International Electronics & Engineering S.A. Method of Furnishing Three-Dimensional Objects with Electrically Conductive Structures having Low Topography and Low Surface Roughness
DE112021005835T5 (en) 2020-11-06 2023-09-07 Iee International Electronics & Engineering S.A. Process for equipping three-dimensional objects with electrically conductive structures with a low topography and low surface roughness
LU102265B1 (en) 2020-12-03 2022-06-03 Iee Sa Method of Furnishing Three-Dimensional Objects with Electrically Conductive Structures having Low Topography and Low Surface Roughness

Also Published As

Publication number Publication date
DE4338285A1 (en) 1995-05-11
DE4498618D2 (en) 1996-11-14

Similar Documents

Publication Publication Date Title
WO1995013204A1 (en) Electronic device for controlling a seat-heating system
EP0577686B1 (en) Vehicle seat
EP0870646B1 (en) Electronic blinker
EP0400002B1 (en) Process for operating a safety device for vehicle passengers
DE19505334C2 (en) Electronic device
DE4301000A1 (en) Capacitive detector system, e.g. for safety belt controller, - contains central electrode between earth and sensor electrodes with potential matching device
DE4432444A1 (en) System for protecting the occupants of vehicles
EP0999956B1 (en) System and method for testing a circuit device for controlling an automobile passenger protection mechanism
EP0881132A1 (en) Method and apparatus for seat occupancy recognition in a vehicle
DE19541998B4 (en) Airbag system for a motor vehicle
DE3237164C2 (en) Testing device for electrical circuits in a motor vehicle
EP0197197B1 (en) Device for controlling electrical consumers in motor vehicles
DE10345560B4 (en) Occupant detection device for a vehicle
WO2007006620A1 (en) Device for triggering an electromagnetic actuator, and method for testing a first inductor of an electromagnetic actuator
EP0820391B1 (en) Arrangement for triggering a personal protection system
DE4139580C2 (en) Seat heating device for motor vehicles
EP0885786B1 (en) Trace circuit for seat belts
WO1999037508A1 (en) Circuit for monitoring the ignition system for a safety device in an automobile
EP1117570A1 (en) Circuit configuration consisting of a deployment element for a belt-tensioner and a belt operation sensor
DE3809580A1 (en) ELECTRONIC DEVICE
DE19539070C2 (en) Arrangement for controlling a triggering device of a restraint system
DE10030389C2 (en) Circuit arrangement for measuring the capacitance of the ignition capacitor for an occupant protection agent
EP0525484B1 (en) Control circuit for an electrically heated steering wheel in an automotive vehicle
EP1320474B1 (en) Arrangement for control of a passenger protection system and method for testing a passenger protection system
DE19737506C1 (en) Automobile passenger restraint system release control

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): DE JP SE US

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
REF Corresponds to

Ref document number: 4498618

Country of ref document: DE

Date of ref document: 19961114

WWE Wipo information: entry into national phase

Ref document number: 4498618

Country of ref document: DE