EP1127242A1 - Circuit et procede pour allumer une amorce - Google Patents

Circuit et procede pour allumer une amorce

Info

Publication number
EP1127242A1
EP1127242A1 EP99962048A EP99962048A EP1127242A1 EP 1127242 A1 EP1127242 A1 EP 1127242A1 EP 99962048 A EP99962048 A EP 99962048A EP 99962048 A EP99962048 A EP 99962048A EP 1127242 A1 EP1127242 A1 EP 1127242A1
Authority
EP
European Patent Office
Prior art keywords
ignition
safing
squib
transistor
switch
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
EP99962048A
Other languages
German (de)
English (en)
Other versions
EP1127242B1 (fr
Inventor
Christian Zelger
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1127242A1 publication Critical patent/EP1127242A1/fr
Application granted granted Critical
Publication of EP1127242B1 publication Critical patent/EP1127242B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/04—Arrangements for ignition
    • F42D1/045—Arrangements for electric ignition
    • F42D1/05—Electric circuits for blasting

Definitions

  • the invention relates to a circuit for igniting a squib according to the preamble of the main claim, and a corresponding ignition method.
  • the invention has for its object to develop a generic circuit in such a way that increased functional reliability is given, and to specify a corresponding method.
  • the squib can only be ignited if a safing pulse is present at the same time as the firing pulse, which switches the safing switch connected to the squib on.
  • Fig. 1 is a block diagram of a circuit
  • FIG. 2 shows a block diagram of a modified embodiment of a circuit.
  • a slave unit 4 is connected to a bus line system 2 and is used to ignite a squib 6.
  • the bus line system 2 contains a first line 8, which carries a first supply voltage, and a second line 10, which carries a second, advantageously different from the first supply voltage. In the case of different supply voltages, their difference can be taken off via an optionally available rectifier 12 and forms a further supply voltage.
  • the bus line system 2 thus serves for the transmission of information and commands and for the voltage supply of the slave unit 4.
  • the slave unit 4 contains an ignition voltage unit 14 which generates a voltage which is used to ignite the squib 6.
  • the ignition voltage is at an ignition voltage output 16 of the slave unit 4.
  • the slave unit 4 has a safety output 18, the function of which is explained below and which is controlled by the second line 10 via the line 19 .
  • An input 20 of the slave unit 4 is connected to an ignition transistor 22 which, after receiving a coded ignition command on the bus line system 2, is controlled by a decoder (not shown) via line 23 and connected to ground via an output 25 is.
  • the ignition voltage output 16 is connected via the squib 6 to a safing transistor 24 which is connected in series between the squib 6 and the input 20.
  • a charging capacitor 27 is connected in parallel to the output 16 and the output 18 and a smoothing capacitor 28 is located at the output 18.
  • a pull-down resistor 30 is connected to the connection between the Zener diode 26 and the safing transistor 24.
  • the further electronics or microelectronic range arranged in the slave unit 4 is known per se and is therefore not described.
  • the safing transistor 24 is normally blocked because the voltage at the output 18 is lower than the breakdown voltage of the zener diode 26. Neither a short circuit in the ignition transistor 22 nor an inadvertent activation of the ignition transistor 22 via the line 23 result in this state to ignite the squib 6.
  • an ignition command generated by a control circuit is first transmitted via the bus line system 2, which activates the ignition transistor 22 via the line 23 or makes it conductive.
  • the bus voltage and thus the voltage at the safing output 18 is then increased, so that the zener diode 26 becomes conductive and the safing transistor 24 is activated or switched to its conductive state.
  • Both transistors 24 and 22 are now conductive, so that the squib 6 is ignited via the ignition voltage at the ignition voltage output 16.
  • Adequate ignition energy is ensured by the capacitor 27.
  • the circuit can be modified in many ways.
  • the rectifier 12 may be missing.
  • the capacitor 28 may be missing.
  • the transistors 22 and 24 and the Zener diode 26 can be replaced by components with a similar effect. Instead of activating the safing transistor 24 via the bus voltage, the sampling transistor 24 can be activated via an additional coded bus command which differs from the bus command for the ignition transistor 22.
  • a resistor 34 with associated switch 36 and a resistor 38 with associated double switch 40 are shown in dashed lines.
  • the resistor 34 can be connected in parallel with the safing transistor 24 and the resistor 38 can be connected in the sense of a limiting resistor for the current through the ignition transistor 22.
  • the switches 36 and 40 are used for diagnostic purposes so as not to interfere with the primer electronics during a diagnosis.
  • Resistor 34 disables the normally blocked safing transistor 24 and resistor 38 limits the current in the event of a possible short circuit of the ignition transistor 22. If the diagnostic current remains below the ignition threshold of the squib 6, this is not ignited.
  • the components 36, 38 and 40 are missing and only the resistor 34 is present.
  • the resistor 34 is then used to carry out a continuity test of the squib 6 even when the safety switch or safing transistor is open.
  • the size of the resistor 34 is to be chosen at least so high that the current through the
  • Ignition cap 6 does not lead to ignition when the ignition transistor 22 is short-circuited.
  • the safing transistor can also be connected in parallel with the squib 6 and is then normally switched through, so that the squib is short-circuited. If an accident is detected, the control circuit generates in addition to the ignition mando a signal causing the opening of the safing transistor, for example by increasing the voltage of line 10, so that the safing transistor goes into the blocking state.
  • the safing transistor can be designed as a depletion FET, the gate of which is connected in the same way as in FIG. 1.
  • the difference between the embodiment according to FIG. 2 and that of FIG. 1 is that the safing transistors 24a and 24b are connected differently.
  • the safing transistor 24a is connected between the ignition voltage output 16 and the squib 6.
  • the safing transistor 24b is connected between the output 25 and ground.
  • the control lines of the safing transistors 24a and 24b have connections 42a and 42b which are connected in a manner not shown to the free connection 42c of the zener diode 26.
  • the circuit according to the invention which forms an ignition stage for squibs, is not limited to activation via bus line systems.
  • Safing transistor redundancy is created with which a high level of security against false tripping is achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)

Abstract

Selon l'invention, un circuit servant à allumer une amorce (6) comprend une unité d'application de tension d'allumage (14) montée en série avec l'amorce et avec un transistor d'allumage (22) qui est commuté, par l'intermédiaire d'une commande d'allumage, de manière à être conducteur. Un commutateur de sûreté (24), monté en série avec l'amorce et avec le transistor d'allumage, est commuté, par l'intermédiaire d'une commande de sûreté qui lui est propre, de manière à être conducteur, pendant l'application d'une impulsion d'allumage. La commande de sûreté et la commande d'allumage sont acheminées au circuit par l'intermédiaire d'un système de lignes de bus (2). L'invention permet d'obtenir une sécurité élevée vis-à-vis de défauts d'allumage de l'amorce.
EP99962048A 1998-11-04 1999-11-04 Circuit et procede pour allumer une amorce Expired - Lifetime EP1127242B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19850868A DE19850868C1 (de) 1998-11-04 1998-11-04 Schaltung und Verfahren zum Zünden einer Zündpille
DE19850868 1998-11-04
PCT/DE1999/003541 WO2000026606A1 (fr) 1998-11-04 1999-11-04 Circuit et procede pour allumer une amorce

Publications (2)

Publication Number Publication Date
EP1127242A1 true EP1127242A1 (fr) 2001-08-29
EP1127242B1 EP1127242B1 (fr) 2003-06-11

Family

ID=7886691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99962048A Expired - Lifetime EP1127242B1 (fr) 1998-11-04 1999-11-04 Circuit et procede pour allumer une amorce

Country Status (3)

Country Link
EP (1) EP1127242B1 (fr)
DE (2) DE19850868C1 (fr)
WO (1) WO2000026606A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011014892A2 (fr) * 2009-07-30 2011-02-03 Detnet South Africa (Pty) Ltd Circuit de déclenchement de détonateur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5321586B2 (fr) * 1973-07-06 1978-07-04
GB2123122A (en) * 1982-01-08 1984-01-25 Hunting Eng Ltd Explosive devices
DE3412798A1 (de) * 1984-04-05 1985-10-17 kabelmetal electro GmbH, 3000 Hannover Schaltungsanordnung und verfahren zum ausloesen einer sprengladung
US5257816A (en) * 1990-12-07 1993-11-02 Honda Giken Kogyo Kabushiki Kaisha Air bag apparatus for vehicle
DE9416368U1 (de) * 1994-10-11 1994-12-01 Flash-Art GmbH, 33604 Bielefeld Vorrichtung zur Zündung von Elektrozündern zur Auslösung von pyrotechnischen Effekten
DE19646387A1 (de) * 1996-11-11 1998-05-20 Telefunken Microelectron Steuerverfahren für ein System, insbesondere für ein Sicherheitssystem in Kraftfahrzeugen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0026606A1 *

Also Published As

Publication number Publication date
DE59905952D1 (de) 2003-07-17
WO2000026606A1 (fr) 2000-05-11
EP1127242B1 (fr) 2003-06-11
DE19850868C1 (de) 2000-04-20

Similar Documents

Publication Publication Date Title
EP1248714B1 (fr) Systeme pour commander le fonctionnement de modules au moyen d'une transmission d'informations effectuee par un appareil de commande par l'intermediaire d'un bus de donnees, appareil d'amorcage et circuit de controle
EP0284728B1 (fr) Circuit pour déclencher un dispositif de protection
DE3919376C2 (de) Zuendeinrichtung fuer eine insassen-schutzvorrichtung in einem fahrzeug
EP0022146B1 (fr) Circuit pour enregistrer le déclenchement erroné d'au moins une installation de sécurité servant à la protection des occupants d'un véhicule lors d'un accident
EP0691244A2 (fr) Méthode de test pour un dispositif de sécurité dans des véhicules automobiles
DE3925594A1 (de) Elektronische einrichtung und betriebsverfahren
DE3400533C2 (de) Auslösevorrichtung für Sicherheitsvorrichtungen in Fahrzeugen
DE3506487C2 (de) Spannungsversorgungseinrichtung für eine Insassenschutzvorrichtung in einem Fahrzeug
DE4409019A1 (de) Zündschaltung für einen Zünder in einem Airbag eines Fahrzeuges
WO1999050106A1 (fr) Procede de transmission d'energie et de donnees dans un systeme de bus destine a des dispositifs de protection des occupants
EP0684163B1 (fr) Procédé pour l'activation d'un étage amplificateur de sortie d'un dispositif de sécurité pour véhicule
EP1711775B1 (fr) Dispositif et procede de destruction/ d'initiation de destruction de dispositifs de protection de passagers / dispositifs de protection d'usagers de la route, comprenant des systemes d'initiation pyrotechniques
DE19752622C1 (de) Kraftfahrzeug-Insassenschutzsystem mit mehreren Zündpillen, und Verfahren zum Ansteuern eines Zündkreises eines solchen Insassenschutzsystems
EP1127242B1 (fr) Circuit et procede pour allumer une amorce
EP0724983A1 (fr) Dispositif de sécurité pour un cable électrique dans des véhicules
EP1035992B1 (fr) Circuit d'allumage et procede permettant de le faire fonctionner
DE102013000116B4 (de) Verfahren zur Identifikation von pyrotechnischen Einheiten in einem Kraftfahrzeug
EP1268238B1 (fr) Procede et dispositif pour allumer au moins un element d'allumage d'un moyen de retenue dans un vehicule
DE19949842B4 (de) Zündeinrichtung für eine pyrotechnische Insassenschutzeinrichtung
DE19743914A1 (de) Verfahren zur Steuerung eines Insassenschutzsystems
DE10031467C2 (de) Schaltungsanordnung zur Ansteuerung eines elektrischen Schaltelements
DE19813953A1 (de) Steuerverfahren und Modul für ein Sicherheitssystem, insbesondere für Insassenschutzsysteme in Kraftfahrzeugen
DE19641793B4 (de) Rückhaltesystem für Kraftfahrzeuge
DE19843074A1 (de) Zündstromkreis für Auslösemittel passiver Insassenschutzeinrichtungen
EP1292471B1 (fr) Circuit de validation electrique d'un systeme de protection de passagers

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20010330

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17Q First examination report despatched

Effective date: 20020426

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 59905952

Country of ref document: DE

Date of ref document: 20030717

Kind code of ref document: P

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040312

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20081121

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20081122

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20081113

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20081117

Year of fee payment: 10

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20091104

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100730

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100601

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091104