EP1104540B1 - Zündelement mit einer laserlichtquelle - Google Patents
Zündelement mit einer laserlichtquelle Download PDFInfo
- Publication number
- EP1104540B1 EP1104540B1 EP99944343A EP99944343A EP1104540B1 EP 1104540 B1 EP1104540 B1 EP 1104540B1 EP 99944343 A EP99944343 A EP 99944343A EP 99944343 A EP99944343 A EP 99944343A EP 1104540 B1 EP1104540 B1 EP 1104540B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- laser light
- laser
- explosive
- ignition
- ignition element
- 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.)
- Expired - Lifetime
Links
Images
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
- F42B3/113—Initiators therefor activated by optical means, e.g. laser, flashlight
Definitions
- the invention relates to an ignition element with a laser light source according to the Preamble of the first claim.
- Ignition elements are known in which the one which triggers the initial ignition Explosive is ignited by means of a laser light source.
- the laser light source is placed outside the room containing the explosive.
- the laser light will either through an optical fiber or through a through-channel to the explosive fed to the initial spark.
- laser optics is usually required to get the laser light in to focus on the explosive at the intensity required for ignition.
- the Explosion of the initial detonator ignites the charge of a detonation body, for example a floor.
- the detonation body can also be a Contain a charge with an explosive, for the ignition of which the energy of the Laser light is sufficient so that no initial ignition is required.
- the laser light is transmitted from the Laser light source supplied to the explosive of the ignition element. It is between coupling optics to the light guide and the explosive of the ignition element connected.
- the laser light source is like this arranged that the laser light through an opening in a sign that the Separates the laser light source from the explosive of the ignition element, and one on it subsequent insulated pipe containing the filter and amplifier optics onto the Explosive of the ignition element is conducted.
- the known ignition elements have the disadvantage that the light guide with its coupling optics or the Laser and light source filter and amplifier optics complex are.
- the transmission of laser light by means of optical Equipment or fiber optic transmission and coupling losses.
- An ignition element for an airbag is known from US Pat. No. 5,660,413.
- the Explosive is from the laser diode through a gap and an attached to it subsequent biconcave glass seal separated.
- DE 38 38 896 A1 describes a storage layer known laser-initiable ignition / ignition element. It has a window through which the Laser light can reach the explosive. The window is with one light-absorbing storage layer occupied by which the laser pulses in temporally stretched heat pulses are converted.
- the object of the present invention is an ignition element with a laser light source to introduce, which is easier and cheaper to manufacture and the above mentioned Does not have disadvantages.
- the Laser light source is a laser diode that is only for single use is determined.
- the explosive to be ignited can be directly on the for the Laser light permeable part of the housing of the laser diode, the exit surface of the Laser lights, lie on.
- the manufacture of ignition elements is simplified and cheaper itself, as there is no coupling of the laser light through optics or a light guide is required. In addition, transmission and coupling losses are avoided.
- the explosive to be ignited facing part of the housing of the laser diode which is permeable to the laser light be occupied by a substance that the absorption of laser light, especially the Infrared portion, improved. This increases the effect of the laser light.
- Carbon or black metal oxides, such as copper, iron and Manganese oxides absorb infrared light particularly well.
- the absorption of the Materials that improve laser light are added to the explosive to be ignited his.
- the prerequisite is that the intended effect of the Explosive is not affected.
- the admixture makes it unnecessary separate operation to cover the laser diode with the absorbent.
- the laser diode can be embedded in the explosive to be ignited, it is expedient if their electrical connections are exposed. At a embedded laser diode is used to initiate the energy required for ignition a larger surface area is available.
- the explosive and the laser diode be surrounded by a common housing. This allows especially with initial fuses, the explosive and the laser diode as Ignition device summarized in a one-piece component of small dimensions become.
- Versions in which the explosive and the laser diode in one Housings are summarized are particularly suitable for gas generators, such as they are used, for example, in airbags or belt tensioners.
- FIG. 1 shows an ignition element 1 in a detonation body 2 as a sectional view.
- the Ignition element 1 in the present exemplary embodiment consists of a laser diode 3, which together with the explosive 4 triggering the initial ignition in one common housing 5 is housed.
- This ignition element 1 is in the Housing 6 of the detonation body 2 is used and extends into its explosive or Powder charge 7.
- the connections 9 protrude from the housing 8 of the laser diode 3 Power supply to the control chip 10 of the laser diode 3.
- the housing 12 of the laser diode 3 is transparent to the laser light 13.
- the one Explosive 4 for the initial ignition part of the laser light 13 permeable housing part 12 forms a window 14 in the common housing 5 of laser diode 3 and explosive 4.
- the laser light 13 occurs at a certain angle in the Rule between 20 ° and 30 ° from which the laser 11 strikes the explosive 4 and ignite him.
- the energy density of the laser light 13 is dependent on the type of Laser diode 3 and thus its output power, from the exit angle of the laser light 13 and the distance between the laser 11 and the explosive 4.
- the ignition behavior of the cargo can be significantly improved if the window 14 of the laser diode 3 is coated with a substance 15, which absorbs the laser light 13, especially the infrared portion, improved.
- FIG 2 shows another embodiment of the invention.
- the embodiment of the laser diode does not differ in its construction from that Laser diode in the embodiment of Figure 1. For this reason matching components designated with the same reference numerals.
- the ignition element 101 in the present exemplary embodiment consists of the Laser diode 3 directly in the explosive charge 107 of the detonation body 102 is inserted and by him, except for the electrical connections 9, completely is surrounded.
- the charge 107 does not require any in the present exemplary embodiment Initial spark.
- the energy by the laser light 13 from the laser diode 3 in the Charge 107 is introduced is sufficient to ignite it.
- the housing 106 of the Detonation body 102 encloses both charge 107 and that Ignition element 101.
- a substance 115 is direct to the explosive of charge 107 admixed, the absorption of the laser light 13, in particular his Infrared portion, improved.
- Ignition elements Because of their simple structure and small size, they are suitable Ignition elements according to the invention in particular for installation in gas generators used in airbags and belt tensioners.
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Semiconductor Lasers (AREA)
- Air Bags (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Optical Couplings Of Light Guides (AREA)
Description
- Figur 1
- einen Schnitt durch einen Detonationskörper, bei dem die Laserdiode und der Explosivstoff von einem gemeinsamen Gehäuse umgeben sind und ein zur Initialzündung vorgesehenes Zündelement bilden, und
- Figur 2
- einen Schnitt durch einen Detonationskörper, bei dem die Laserdiode in den zu zündenden Explosivstoff direkt eingebettet ist.
Claims (6)
- Zündelement (1) mit einer Laserlichtquelle (3) zur Zündung des Explosivstoffs (4, 107) in einem Detonationskörper (2) wobei die Laserlichtquelle eine Laserdiode (3) ist, dadurch gekennzeichnet, dass der zu zündende Explosivstoff (4, 107) unmittelbar auf dem für das Laserlicht (13) durchlässigen Teil (12) des Gehäuses (8) der Laserdiode (3) angeordnet ist.
- Zündelement nach Anspruch 1, dadurch gekennzeichnet, daß der für das Laserlicht (13) durchlässige Teil (12) des Gehäuses (8) der Laserdiode (3) mit einem die Absorption des Laserlichts (13), insbesondere des Infrarotanteils, verbessernden Stoff (15) belegt ist.
- Zündelement nach Anspruch 1, dadurch gekennzeichnet, daß dem mittels des Laserlichts (13) zu zündende Explosivstoff (107) ein die Absorption des Laserlichts (13), insbesondere des infrarotanteils, verbessernder Stoff (115) zugemischt ist.
- Zündelement nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Explosivstoff (4, 107) und die Laserdiode (3) von einem gemeinsamen Gehäuse (5, 106) umgeben sind.
- Zündelement nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Laserdiode (3) in dem Explosivstoff (107) eingebettet ist.
- Zündelement nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß es in Gasgeneratoren eingesetzt wird, die insbesondere in Airbags und Gurtstraffern Verwendung finden.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19837839 | 1998-08-20 | ||
DE19837839A DE19837839A1 (de) | 1998-08-20 | 1998-08-20 | Zündelement mit einer Laserlichtquelle |
PCT/EP1999/005719 WO2000011428A1 (de) | 1998-08-20 | 1999-08-07 | Zündelement mit einer laserlichtquelle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1104540A1 EP1104540A1 (de) | 2001-06-06 |
EP1104540B1 true EP1104540B1 (de) | 2003-04-09 |
Family
ID=7878175
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99944343A Expired - Lifetime EP1104540B1 (de) | 1998-08-20 | 1999-08-07 | Zündelement mit einer laserlichtquelle |
Country Status (7)
Country | Link |
---|---|
US (1) | US6499404B1 (de) |
EP (1) | EP1104540B1 (de) |
JP (1) | JP2002537534A (de) |
AT (1) | ATE237119T1 (de) |
DE (2) | DE19837839A1 (de) |
ES (1) | ES2196850T3 (de) |
WO (1) | WO2000011428A1 (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE518183C2 (sv) * | 2001-03-14 | 2002-09-03 | Bofors Bepab Ab | Sätt och anordning för initiering av explosivämnesladdningar |
US7201103B1 (en) | 2002-02-25 | 2007-04-10 | Bofors Bepab Ab | Method for initiation and ignition of explosive charges through self-destruction of a laser source |
FR2888234B1 (fr) * | 2005-07-05 | 2008-05-02 | Saint Louis Inst | Composition energetique dopee optiquement |
NZ579641A (en) * | 2007-03-16 | 2012-10-26 | Orica Explosives Tech Pty Ltd | Initiation of explosives materials with a laser delivered by a fibre optic |
GB2448771A (en) * | 2007-04-28 | 2008-10-29 | S Rafi Ahmad | Means for achieving low order detonation of a device filled with a metal oxyanion / bidentate fuel ligand complex by means of a low power diode laser |
JP2009008325A (ja) * | 2007-06-28 | 2009-01-15 | Ihi Aerospace Co Ltd | 爆発物の処理方法 |
US7942097B1 (en) * | 2008-03-06 | 2011-05-17 | Sandia Corporation | Modular initiator with integrated optical diagnostic |
PE20130833A1 (es) * | 2010-05-07 | 2013-08-17 | Orica Int Pte Ltd | Sistema, dispositivo y metodo de explosion |
FR2978762B1 (fr) * | 2011-08-01 | 2013-08-02 | Nexter Munitions | Detonateur de securite |
US11131530B2 (en) | 2018-01-29 | 2021-09-28 | Lawrence Livermore National Security, Llc | Opto-thermal laser detonator |
US11407378B2 (en) * | 2019-03-18 | 2022-08-09 | Andras Fenyves | Airbag system and related methods of inflating an airbag |
CN111121545A (zh) * | 2019-12-10 | 2020-05-08 | 南京理工大学 | 一种光纤式激光点火器及点火系统 |
US11209257B2 (en) * | 2019-12-12 | 2021-12-28 | Northrop Grumman Systems Corporation | Voltage polarity immunity using reverse parallel laser diodes |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3362329A (en) | 1963-12-10 | 1968-01-09 | Epstein Sidney | Electro-explosive devices |
US4343242A (en) * | 1980-04-28 | 1982-08-10 | Gould Inc. | Laser-triggered chemical actuator for high voltage isolation |
US4660472A (en) * | 1985-10-07 | 1987-04-28 | Morton Thiokol Inc. | Optical through bulkhead initiator and safe-arm device |
DE3542447C2 (de) * | 1985-11-30 | 1993-11-18 | Diehl Gmbh & Co | Laserempfindliche Anzündmischung |
EP0289184B1 (de) * | 1987-04-30 | 1991-12-27 | Nippon Oil And Fats Company, Limited | Mittels eines Laserstrahles zündbare Sprengkapsel |
DE3838896C2 (de) * | 1988-11-17 | 1999-07-01 | Dynamit Nobel Ag | Mit einer Speicherschicht versehenes laserinitiierbares Zünd-/Anzündelement |
DE3909952A1 (de) * | 1989-03-25 | 1990-09-27 | Dynamit Nobel Ag | Laserinitiierbares zuend-/anzuendmittel |
US5206455A (en) * | 1991-03-28 | 1993-04-27 | Quantic Industries, Inc. | Laser initiated ordnance systems |
US5204490A (en) * | 1991-06-21 | 1993-04-20 | Mcdonnell Douglas Corporation | Laser diode apparatus for initiation of explosive devices |
US5212339A (en) * | 1992-03-27 | 1993-05-18 | The United States Of America As Represented By The United States Department Of Energy | Explosive laser light initiation of propellants |
GB2267330A (en) * | 1992-05-23 | 1993-12-01 | Secr Defence | Laser ignition of gas generators |
US5660413A (en) * | 1995-08-24 | 1997-08-26 | Trw Vehicle Safety Systems Inc. | Air bag inflator with laser diode initiator |
US5756924A (en) * | 1995-09-28 | 1998-05-26 | The Regents Of The University Of California | Multiple laser pulse ignition method and apparatus |
FR2796142B1 (fr) * | 1999-07-06 | 2002-08-09 | Saint Louis Inst | Detonateur optique a deux etages et a transition choc-detonation |
-
1998
- 1998-08-20 DE DE19837839A patent/DE19837839A1/de not_active Withdrawn
-
1999
- 1999-08-07 US US09/763,193 patent/US6499404B1/en not_active Expired - Fee Related
- 1999-08-07 AT AT99944343T patent/ATE237119T1/de not_active IP Right Cessation
- 1999-08-07 WO PCT/EP1999/005719 patent/WO2000011428A1/de active IP Right Grant
- 1999-08-07 DE DE59904975T patent/DE59904975D1/de not_active Expired - Fee Related
- 1999-08-07 EP EP99944343A patent/EP1104540B1/de not_active Expired - Lifetime
- 1999-08-07 JP JP2000566638A patent/JP2002537534A/ja not_active Withdrawn
- 1999-08-07 ES ES99944343T patent/ES2196850T3/es not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US6499404B1 (en) | 2002-12-31 |
EP1104540A1 (de) | 2001-06-06 |
ES2196850T3 (es) | 2003-12-16 |
JP2002537534A (ja) | 2002-11-05 |
ATE237119T1 (de) | 2003-04-15 |
DE19837839A1 (de) | 2000-02-24 |
WO2000011428A1 (de) | 2000-03-02 |
DE59904975D1 (de) | 2003-05-15 |
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