EP1030158A1 - Elektrischer, pyrortechnischer Anzünder mit integrierter Elektronik - Google Patents

Elektrischer, pyrortechnischer Anzünder mit integrierter Elektronik Download PDF

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Publication number
EP1030158A1
EP1030158A1 EP00400194A EP00400194A EP1030158A1 EP 1030158 A1 EP1030158 A1 EP 1030158A1 EP 00400194 A EP00400194 A EP 00400194A EP 00400194 A EP00400194 A EP 00400194A EP 1030158 A1 EP1030158 A1 EP 1030158A1
Authority
EP
European Patent Office
Prior art keywords
pyrotechnic
electro
igniter according
pyrotechnic igniter
electronic card
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00400194A
Other languages
English (en)
French (fr)
Other versions
EP1030158B1 (de
Inventor
Jean-René Duguet
Jean-Pierre Vedel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Livbag SAS
Original Assignee
Livbag SAS
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 Livbag SAS filed Critical Livbag SAS
Publication of EP1030158A1 publication Critical patent/EP1030158A1/de
Application granted granted Critical
Publication of EP1030158B1 publication Critical patent/EP1030158B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F42B3/12—Bridge initiators
    • F42B3/121—Initiators with incorporated integrated circuit

Definitions

  • the present invention relates to the field of automotive safety and relates more particularly to a electro-pyrotechnic igniter.
  • electro-pyrotechnic igniters have, on the one hand, pins metallic connected to an electric current source and between which a core of ferrite, and on the other hand, a resistive heating element which is attached to said metal pins and which is covered with a pyrotechnic priming composition.
  • the resistive element heater can consist of a resistive strip heater integrated in a printed sub-circuit.
  • the skilled person is therefore always looking electro-pyrotechnic igniters capable of being integrated in a cable network connected to a central processing unit control and with similar external dimensions to that of traditional lighters.
  • the means of dialogue and trigger will be a specific integrated circuit and the coded information which circulates between the central unit control and said means of dialogue and trigger will consist of pulse trains specific electrical.
  • the coded information will include both information constituting the trigger orders for different igniters and information allowing the central control unit to ensure the reliability of electronic components contained in each igniter.
  • the means of dialogue and trigger is placed on one of the two sides planes of the electronic card and storage medium of electrical energy is placed on the other flat face.
  • the dividing transverse wall is carried out using a metal part bearing several perforations, each of these perforations having a glass side wall.
  • the metal part carries two perforations and the electrical connection means are constituted by two metal connection pins, each being inserted into one of the two perforations carried by the metal part and having a first end attached to the resistive element heating and a second end welded to the tracks conductive.
  • This dividing transverse wall therefore ensures sealing between the chamber upstream and downstream chamber before and after operation from the igniter but also to electrically isolate the metal connection pins to each other.
  • the electronic card is arranged perpendicular to the transverse wall separator.
  • the resistive heating element consists of a thin layer resistive bridge resting on the metal part, said resistive bridge in thin layer consisting of tantalum nitride whose thickness is between 0.01 ⁇ m and 1 ⁇ m.
  • the resistive bridge could also consist for example in a layer of a nickel / chromium alloy.
  • the pyrotechnic composition priming is a lacquer based on trinitrorésorcinate of lead which covers the resistive bridge. Said initiating pyrotechnic composition can also consist for example of salts of dinitrobenzofuroxane.
  • the external electrodes are formed by external metallic pins which are arranged in line with the map which are parallel to this card.
  • the storage means of electrical energy consists of a capacitor.
  • the invention also relates to the use of such electro-pyrotechnic igniters in gas generators for air bag modules connected in a motor vehicle via a bus-type cable network to a central control unit.
  • Figure 1 is a partial sectional view longitudinal of an electro-pyrotechnic igniter according to the preferred embodiment of the invention with omission of electronic components and part of the coating.
  • Figure 2 is a cutaway perspective view of the igniter partially shown in Figure 1 with omission of the coating.
  • Figure 3 is a diagram of a wired network of bus type in which four air-bag modules are integrated each containing an electro-pyrotechnic igniter shown in Figures 1 and 2
  • an electro-pyrotechnic igniter 1 consists of a cap 2 which is provided a side wall 6 ending, on the one hand, with a bottom 4, and on the other hand, by a free end 33, and in which a liner 3 is first inserted cylindrical.
  • the latter has a first end resting against the bottom 4 of the cap 2 and a wall lateral 5 whose external surface is in contact with a part of the internal surface of the side wall 6 of the cap 2.
  • a pyrotechnic ignition composition 7 in the form of a powdery substance is then inserted in the cap 2.
  • a set, described below, is finally slipped into said cap 2.
  • This set is made from a glass passage which comprises, on the one hand, a piece discoid metal B with an upstream face and a downstream face to which a resistive element is attached heating 11, and on the other hand, two connection pins 13, 14 metallic.
  • the piece metallic discoid B has two perforations each comprising a side wall 9, 10 made of glass, the two metallic connection pins 13, 14 are each introduced into one of the two perforations and said pins 13, 14 each have a first end fixed by welding to the resistive element heating 11.
  • the latter is advantageously carried out at using a thin-film resistive bridge consisting of tantalum nitride, the thickness of which is approximately 0.5 ⁇ m.
  • a printed circuit support in the form a rectangular electronic card 17 having a upper flat face 26 and a lower flat face 27 on which are arranged conductive tracks 18, 19, is attached to connection pins 13, 14. More specifically, the second end 24, 25 of each of two connection pins 13, 14 is fixed by welding to the conductive tracks 18, 19 on the flat face upper 26 so that edge 28 of the rectangular electronic card 17 either in contact with the upstream face of the discoid metal part 8.
  • a electrical energy storage means 20 consisting of a capacitor as well as protection means 21, 22 against electrostatic discharge and against electromagnetic disturbances are connected to conductive tracks 18, 19 on the upper flat face 26 and a means of dialogue and triggering of a specific electrical pulse train is connected to the conductive tracks 18, 19 on the flat face lower 27.
  • the electronic card 17 rectangular is further extended by three external metal pins 29 to 31 each having one end fixed by welding on the tracks conductive 18, 19, said external pins 29, 30 being fixed on the upper flat face 26 and intended to be integrated into a cable network of the type bus attached to a central control unit and the external pin 31 being fixed on the flat face lower 27 and ensuring grounding.
  • a 12-pyrotechnic initiation composition the form of a lacquer based on trinitrorésorcinate lead is deposited on the resistive heating element 11 and the assembly as described above is introduced in the cap 2, the discoid metal part 8 being placed on the second end of the liner 3 cylindrical.
  • a plastic part 32 is inserted into the cap 2 and the free end 33 of the latter is set on part 32.
  • a thermosetting polymer coating is then injected through a hole presented by the part 32 so as to fill the interior of the Exhibit 32.
  • An electro-pyrotechnic igniter 1 as described previously presents an operating diagram next.
  • the means of storage 20 of electrical energy constituted here by a capacitor, is regularly supplied with current low intensity emitted by the central unit of control and transmitted to said capacitor via external pins 29 and 30.
  • the unit control center issues a trip order under the flour of a train of electric pulses specific which can only be detected by means of dialogue and trigger included in the igniter 1.
  • This means of dialogue and triggering then makes it possible to apply the capacitor which is therefore caused to free, in the two connection pins 13, 14 and therefore in the resistive heating element 11, the quantity of electrical energy that was stored.
  • Said element resistive heater 11 then causes, by Joule effect, initiation of the pyrotechnic initiation composition 12, and consequently, the initiation into combustion of the ignition pyrotechnic composition 7, which has effect of fracturing the bottom 4 of the cap 2.
  • an advantage important is that when activating of igniter 1, the various electronic components are not damaged by the resulting pressure wave the initiation of the pyrotechnic composition boot 12, and the means of dialogue and trigger is then still able to exchange information with the central control unit in the following milliseconds, especially to signify it for example that the triggering of igniter 1 has been correctly executed.
  • FIG. 3 we observe a diagram showing an example of a wired bus network in which a central control unit is integrated 110 as well as four air bag modules 111a, 111b, 111c and 111d, the two airbag modules 111b and 111c being able to example each contain a gas generator intended for inflate a frontal protection cushion, and both other airbag modules 111a and 111d which can for example each contain a gas generator intended to inflate a side protection cushion.
  • the gas generator included in each of these different modules contain an electro-pyrotechnic igniter as previously described which presents so three external pins 114 to 116 metallic, the two external pins 114 and 115 being intended to be connected to a first supply conductor electric 112 attached to the central control unit 110 and the external pin 116 being intended to be connected to a second electrical conductor 113 attached also to the central control unit 110 and serving grounding.
  • the central control unit 110 delivers periodically a low intensity electric current in the first power supply conductor 112, and this electric current is transmitted by means of electrical energy storage of the igniter included in each of the four air-bag modules 111a, 111b, 111c and 111d via external pins 114 and 115.
  • the central control unit 110 delivers in the first power supply conductor 112 a train of specific electrical pulses constituting a trigger order for the module igniter airbag 111c.
  • This train of electrical pulses is transmitted to each igniter by through external pins 114 and 115 but only the means of dialogue and trigger included in the igniter of the air bag module 111c is able to detect and analyze it.
  • the means of energy storage electric associated with dialogue and trigger included in the air bag module igniter 111c is then requested and it causes the initiation of the pyrotechnic initiation composition as described previously.
  • the unit command center 110 then delivers in the first power supply conductor 112 trains specific electrical impulses intended for the igniter included in each of the 111a air-bag modules and 111b.
  • the operation of each of the two igniters is then analogous to that analyzed above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
EP00400194A 1999-02-18 2000-01-26 Elektrischer, pyrotechnischer Anzünder mit integrierter Elektronik Expired - Lifetime EP1030158B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9901949A FR2790077B1 (fr) 1999-02-18 1999-02-18 Allumeur electro-pyrotechnique a electronique integree
FR9901949 1999-02-18

Publications (2)

Publication Number Publication Date
EP1030158A1 true EP1030158A1 (de) 2000-08-23
EP1030158B1 EP1030158B1 (de) 2002-10-30

Family

ID=9542158

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00400194A Expired - Lifetime EP1030158B1 (de) 1999-02-18 2000-01-26 Elektrischer, pyrotechnischer Anzünder mit integrierter Elektronik

Country Status (7)

Country Link
US (1) US6418853B1 (de)
EP (1) EP1030158B1 (de)
JP (1) JP3294582B2 (de)
AT (1) ATE227016T1 (de)
DE (1) DE60000668T2 (de)
ES (1) ES2184680T3 (de)
FR (1) FR2790077B1 (de)

Cited By (4)

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Publication number Priority date Publication date Assignee Title
FR2814804A1 (fr) * 2000-10-04 2002-04-05 Denis Dubois Dispositif de securite electronique sans desalignement de chaine pyrotechnique
WO2003091077A1 (fr) * 2002-04-25 2003-11-06 Daicel Chemical Industries, Ltd. Procede de determination de la capacite de charge de condensateur
US7155353B2 (en) 2002-04-25 2006-12-26 Daicel Chemical Industries, Ltd. Method for determining charging capacitance of capacitor
WO2010094243A1 (zh) * 2009-02-23 2010-08-26 北京铱钵隆芯科技有限责任公司 点火头

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US6341562B1 (en) * 2000-02-22 2002-01-29 Autoliv Asp, Inc. Initiator assembly with activation circuitry
US6584907B2 (en) * 2000-03-17 2003-07-01 Ensign-Bickford Aerospace & Defense Company Ordnance firing system
FR2813118B1 (fr) * 2000-08-17 2003-03-07 Livbag Snc Allumeur electro-pyrotechnique a deux tetes d'allumage et utilisation en securite automobile
US7752970B2 (en) 2000-09-06 2010-07-13 Ps/Emc West, Llc Networked electronic ordnance system
US7644661B1 (en) * 2000-09-06 2010-01-12 Ps/Emc West, Llc Networked electronic ordnance system
DE10123284A1 (de) 2001-05-12 2002-11-14 Conti Temic Microelectronic Pyrotechnische Zündeinrichtung mit integrierter Elektronikbaugruppe
DE10123282A1 (de) 2001-05-12 2002-11-14 Conti Temic Microelectronic Pyrotechnische Zündeinrichtung mit integrierter Elektronikbaugruppe
DE10123285A1 (de) * 2001-05-12 2002-11-14 Conti Temic Microelectronic Zündelement für pyrotechnische Wirkmassen auf einer Schaltungsträgeranordnung mit einer Zündelektronikbaugruppe
US6820557B2 (en) 2002-01-25 2004-11-23 Daicel Chemical Industries, Ltd. Igniter for air bag system
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FR2672675A1 (fr) * 1991-02-12 1992-08-14 Davey Bickford Module d'allumage pour detonateur a retard electronique integre, ensemble de tir comportant des detonateurs associes a de tels modules d'allumage et procede de chargement d'un ensemble de modules de ce type.
EP0520360A1 (de) * 1991-06-26 1992-12-30 Expert Explosives (Proprietary) Limited Bestandteil eines elektronischen Detonators und Methode zum Zusammenbau eines elektronischen Detonators
FR2710404A1 (fr) * 1992-09-17 1995-03-31 Davey Bickford Procédé de commande de détonateurs du type à module d'allumage électronique à retard intégré, ensemble codé de commande de tir et module d'allumage codé pour sa mise en Óoeuvre.
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WO1997021067A1 (en) * 1995-12-06 1997-06-12 Orica Trading Pty Ltd Electronic explosives initiating device
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FR2760525A1 (fr) 1997-03-07 1998-09-11 Livbag Snc Initiateur electro-pyrotechnique constitue autour d'un circuit imprime complet
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2814804A1 (fr) * 2000-10-04 2002-04-05 Denis Dubois Dispositif de securite electronique sans desalignement de chaine pyrotechnique
WO2003091077A1 (fr) * 2002-04-25 2003-11-06 Daicel Chemical Industries, Ltd. Procede de determination de la capacite de charge de condensateur
US7155353B2 (en) 2002-04-25 2006-12-26 Daicel Chemical Industries, Ltd. Method for determining charging capacitance of capacitor
US7309079B2 (en) 2002-04-25 2007-12-18 Daicel Chemical Industries, Ltd. Method of determining charging capacitance of capacitor
WO2010094243A1 (zh) * 2009-02-23 2010-08-26 北京铱钵隆芯科技有限责任公司 点火头

Also Published As

Publication number Publication date
DE60000668D1 (de) 2002-12-05
ES2184680T3 (es) 2003-04-16
JP2000241098A (ja) 2000-09-08
JP3294582B2 (ja) 2002-06-24
US6418853B1 (en) 2002-07-16
FR2790077B1 (fr) 2001-12-28
DE60000668T2 (de) 2003-06-12
FR2790077A1 (fr) 2000-08-25
EP1030158B1 (de) 2002-10-30
ATE227016T1 (de) 2002-11-15

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