WO2000026606A1 - Circuit and method for detonating a priming cap - Google Patents
Circuit and method for detonating a priming cap Download PDFInfo
- Publication number
- WO2000026606A1 WO2000026606A1 PCT/DE1999/003541 DE9903541W WO0026606A1 WO 2000026606 A1 WO2000026606 A1 WO 2000026606A1 DE 9903541 W DE9903541 W DE 9903541W WO 0026606 A1 WO0026606 A1 WO 0026606A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ignition
- safing
- squib
- transistor
- switch
- Prior art date
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.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE59905952T DE59905952D1 (en) | 1998-11-04 | 1999-11-04 | CIRCUIT AND METHOD FOR IGNITING AN IGNITION BALL |
EP99962048A EP1127242B1 (en) | 1998-11-04 | 1999-11-04 | Circuit and method for detonating a priming cap |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19850868A DE19850868C1 (en) | 1998-11-04 | 1998-11-04 | Detonator capsule detonation circuit |
DE19850868.9 | 1998-11-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000026606A1 true WO2000026606A1 (en) | 2000-05-11 |
Family
ID=7886691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1999/003541 WO2000026606A1 (en) | 1998-11-04 | 1999-11-04 | Circuit and method for detonating a priming cap |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1127242B1 (en) |
DE (2) | DE19850868C1 (en) |
WO (1) | WO2000026606A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011014892A2 (en) * | 2009-07-30 | 2011-02-03 | Detnet South Africa (Pty) Ltd | Detonator firing circuit |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3931527A (en) * | 1973-07-06 | 1976-01-06 | Nippon Soken, Inc. | Ignition circuit for vehicle occupant protecting system |
GB2123122A (en) * | 1982-01-08 | 1984-01-25 | Hunting Eng Ltd | Explosive devices |
US5257816A (en) * | 1990-12-07 | 1993-11-02 | Honda Giken Kogyo Kabushiki Kaisha | Air bag apparatus for vehicle |
DE9416368U1 (en) * | 1994-10-11 | 1994-12-01 | Flash Art Gmbh | Device for igniting electric igniters to trigger pyrotechnic effects |
EP0842824A1 (en) * | 1996-11-11 | 1998-05-20 | TEMIC TELEFUNKEN microelectronic GmbH | Control method for a safety system in a motor vehicle |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3412798A1 (en) * | 1984-04-05 | 1985-10-17 | kabelmetal electro GmbH, 3000 Hannover | Circuit arrangement and method for triggering an explosive charge |
-
1998
- 1998-11-04 DE DE19850868A patent/DE19850868C1/en not_active Revoked
-
1999
- 1999-11-04 EP EP99962048A patent/EP1127242B1/en not_active Expired - Lifetime
- 1999-11-04 DE DE59905952T patent/DE59905952D1/en not_active Expired - Fee Related
- 1999-11-04 WO PCT/DE1999/003541 patent/WO2000026606A1/en active IP Right Grant
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3931527A (en) * | 1973-07-06 | 1976-01-06 | Nippon Soken, Inc. | Ignition circuit for vehicle occupant protecting system |
GB2123122A (en) * | 1982-01-08 | 1984-01-25 | Hunting Eng Ltd | Explosive devices |
US5257816A (en) * | 1990-12-07 | 1993-11-02 | Honda Giken Kogyo Kabushiki Kaisha | Air bag apparatus for vehicle |
DE9416368U1 (en) * | 1994-10-11 | 1994-12-01 | Flash Art Gmbh | Device for igniting electric igniters to trigger pyrotechnic effects |
EP0842824A1 (en) * | 1996-11-11 | 1998-05-20 | TEMIC TELEFUNKEN microelectronic GmbH | Control method for a safety system in a motor vehicle |
Also Published As
Publication number | Publication date |
---|---|
EP1127242A1 (en) | 2001-08-29 |
DE59905952D1 (en) | 2003-07-17 |
EP1127242B1 (en) | 2003-06-11 |
DE19850868C1 (en) | 2000-04-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1248714B1 (en) | System for controlling the operation of modules using information transmitted from a control device via a data bus, a trigger device and a test circuit | |
EP0691244B1 (en) | Test method for a passive safety device in motor vehicles | |
EP0284728B1 (en) | Circuit for actuating a protection device | |
EP0022146B1 (en) | Circuit for recording erroneous operation of at least one safety device protecting vehicle occupants in the event of an accident | |
DE3919376C2 (en) | IGNITION DEVICE FOR AN occupant protection device in a vehicle | |
DE3400533C2 (en) | Triggering device for safety devices in vehicles | |
WO1999050106A1 (en) | Method for transmitting power and data in a bus system provided for occupant protection devices | |
DE19547307B4 (en) | Passenger protection device and associated actuating device | |
EP1711775B1 (en) | Device and method for the disposal/disposal-firing of occupant protection devices/road user protection devices with pyrotechnic igniters | |
DE19752622C1 (en) | Motor vehicle occupant protection system with a plurality of squibs, and method for actuating an ignition circuit of such an occupant protection system | |
EP1127242B1 (en) | Circuit and method for detonating a priming cap | |
EP0724983A1 (en) | Safety device for electrical cable in vehicles | |
DE102013000116B4 (en) | Method for identifying pyrotechnic units in a motor vehicle | |
EP1035992B1 (en) | Ignition circuit and method for operating the same | |
EP1268238B1 (en) | Method and device for triggering at least one firing element for restraining means in a motor vehicle | |
DE19949842B4 (en) | Ignition device for a pyrotechnic occupant protection device | |
DE19546359A1 (en) | System with two spatially separate electrical circuits connected via cable, e.g. for motor vehicle airbag triggering, | |
DE19743914A1 (en) | Method of controlling motor vehicle occupant protection system | |
DE19813953A1 (en) | Control method and module for a safety system, in particular for occupant protection systems in motor vehicles | |
DE19641793B4 (en) | Restraint system for motor vehicles | |
DE10031467C2 (en) | Circuit arrangement for controlling an electrical switching element | |
DE19843074A1 (en) | Ignition circuit for release devices of passive passenger protection devices especially in cars | |
EP1292471B1 (en) | Electrical release circuit for a passenger protection system | |
DE10349888B4 (en) | Coded ignition unit for an airbag module and thus equipped airbag module for a motor vehicle airbag system | |
EP0525484A1 (en) | Control circuit for an electrically heated steering wheel in an automotive vehicle |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): JP KR US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1999962048 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 09831023 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 1999962048 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1999962048 Country of ref document: EP |