EP0932015A1 - Detonator - Google Patents
Detonator Download PDFInfo
- Publication number
- EP0932015A1 EP0932015A1 EP99100536A EP99100536A EP0932015A1 EP 0932015 A1 EP0932015 A1 EP 0932015A1 EP 99100536 A EP99100536 A EP 99100536A EP 99100536 A EP99100536 A EP 99100536A EP 0932015 A1 EP0932015 A1 EP 0932015A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- detonator
- bridge
- ignition
- smd
- housing base
- 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
Links
- 238000010304 firing Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000005476 soldering Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 230000037452 priming Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 210000004508 polar body Anatomy 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
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
- F42B3/12—Bridge initiators
- F42B3/124—Bridge initiators characterised by the configuration or material of the bridge
Definitions
- the invention relates to a detonator according to the Preamble of claim 1.
- EP 0 248 977 A1 describes a carrier for one electric bridge igniter and a method for its Manufacturing known.
- the bridge igniter is for ignition of priming, delay and pyrotechnic Mixtures as well as for the ignition of primary igniters and rates provided.
- This well-known electrical Bridge igniter consists of one in a metallic Outer ring inserted ceramic body with a hole or with several holes. There is one in each hole solid or tubular contact pin as power supply firmly and tightly fitted. Each hole is one electrically conductive layer surrounded flat. Is located between the electrically conductive layers the ignition bridge.
- the ignition bridge can be replaced by a Atomization or by means of a vapor deposition technique in a vacuum or generated by a screen printing process.
- An electric bridge igniter with one versus one metallic housing insulates built-in glow bridge wire is known from DE 36 13 134 A1.
- An unwanted one voltage dependent response due to electrostatic charge shifts on both sides parasitic arcing lines with simple to avoid manufacturing technical means
- Wire ends of the glow plug wire including the Surrounding areas of their attachment points on the Terminal poles of the bridge igniter with an insulating layer made of insulating varnish, which after a dive from arcuate bridge wire center area expires or the is dripped onto the area surrounding the attachment points.
- DE 42 36 729 A1 describes a squib with an insulating pole body with electrically conductive Longitudinal stripes, with one arranged on the polar body Glow plug and with connecting wires, the glow plug and the connecting wires each with the longitudinal strips over Solder points are connected, and with at least one Detonator and an outer top coat that matches the detonator covered.
- detonators work after that electrothermal principle. I.e. that by feeding electrical energy the detonator's ignition bridge is usually strongly heated until evaporation. Here becomes the one in contact with the ignition bridge Ignition charge warms up beyond its initiation limit and ignition of the primer initiated.
- Known detonators often have a very low resistance Ignition bridge on. Such low-resistance ignition bridges are however, is difficult to control electronically.
- the same detonators are known in which the ignition bridge is one has moderate resistance.
- Such ignition bridges the latter type are better electronic controllable, due to the small geometries of the Ignition bridges, e.g. of the wire diameter, however, they are relatively difficult to manufacture.
- Another shortcoming known detonators is that the Resistance value of your ignition bridge always with large Resistance tolerances is affected. For example, the Resistance tolerance of a known detonator with a Resistance value of its ignition bridge of 15 ohms in the range of ⁇ 4 ohms, i.e. the resistance tolerance is on the order of ⁇ 20%.
- a bridge wire or a bridge layer element for the ignition bridge is replaced by a miniature SMD resistor (Surface Mounted Device).
- SMD resistors are readily available on the market at low cost.
- the resistance value can advantageously be freely selected within wide limits regardless of the particular design of the SMD resistor. Resistance values between ⁇ 1 Ohm and> kOhm are available in almost all sizes of such SMD resistors.
- the desired resistance value within the standard series (eg E24, E48 or E96) can be selected in a sufficiently finely graduated manner; and that the resistance tolerance of the resistance value of an SMD resistor forming the ignition bridge with values of ⁇ 1% can be selected from the standard program of the SMD resistors, and that the responsiveness, ie the peak power for igniting the firing rate of the detonator by selecting the design or
- the size of the SMD resistor can be freely selected within wide limits; and that the ignition sensitivity can be influenced reproducibly within wide limits by the selection of the resistance technology (such as thick-film or thin-film resistance) and by the treatment of the resistance layer (with or without coating).
- a size 0402 SMD resistor has a continuous power loss of the order of 50 to 60 mW.
- the temperatures required to initiate the detonator's firing rate of up to 400 ° C can be reached with a short delay time.
- Larger sizes, such as 0603, 0805 or 1206, have correspondingly higher power losses and therefore also require correspondingly higher peak powers in order to reach the initiation temperature at the boundary layer with the detonator's priming charge.
- the inventive use of known SMD resistors as the ignition bridge of the detonator makes it possible in an advantageous manner while maintaining the known mounting conditions for such SMD resistors, for example on printed circuit boards, ceramic substrates, transistor bases, IC packages or the like.
- the response sensitivity as desired to vary on the order of a decade, to be able to freely select the resistance value of the SMD resistor forming the ignition bridge within five decades as desired, and to be able to specify the resistance tolerance of the SMD resistor ⁇ as 1%.
- Another very special advantage of using one known SMD resistor for the ignition bridge of the Detonator according to the invention consists in the possibility easily two or more than two "heating elements" per To be able to use detonator or flame igniter.
- the SMD resistors are expedient interconnected on one side. This common connection and the associated with the individual SMD resistors second connectors are from the housing of the detonator led out to create the opportunity at High reliability applications with redundant ignition to be able to apply.
- the figure shows a training in a sectional view of the detonator 10, which is made on a housing base 12 electrically insulating material contact surfaces 14 has that in thick or thin film technology are realized.
- the contact surfaces 14 are with Connection pins 16 electrically connected, which itself extend through the housing base 12.
- the contact surfaces 14 on the inside of the housing base 12 form connection contacts for SMD resistors 18.
- the SMD resistors 18 form an ignition bridge 20 for one Ignition charge 22 of the detonator 10.
- the ignition charge 22 is on the SMD resistors 18 or on the housing base 12 pressed on.
- the detonator 10 has a housing 24 which is surrounded by a Housing sleeve 26 and a cover member 28 is formed. In there is a space 30 enclosed by the housing 24 Amplifier set 32 of the detonator 10.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Air Bags (AREA)
- Automotive Seat Belt Assembly (AREA)
Abstract
Description
Bspw. besitzt ein SMD-Widerstand der Baugröße 0402 eine Dauerverlustleistung von größenordnungsmäßig 50 bis 60 mW. Durch eine definierte Ansteuerung eines solchen SMD-Widerstandes mit einer Spitzenleistung im Bereich einiger 10 W sind die für die Initiierung des Anzündsatzes des Detonators erforderlichen Temperaturen von größenordnungsmäßig bis 400°C mit kurzer Verzögerungszeit erreichbar. Größere Baugrößen wie bspw. 0603, 0805 oder 1206 besitzen entsprechend höhere Bauverlustleistungen und erfordern daher auch entsprechend höhere Spitzenleistungen, um die Initiierungstemperatur an der Grenzschicht zum Anzündsatz des Detonators zu erreichen.
Durch die erfindungsgemäße Anwendung an sich bekannter SMD-Widerstände als Zündbrücke des Detonators ist es in vorteilhafter Weise möglich, unter Beibehaltung der an sich bekannten Montagebedingungen für solche SMD-Widerstände bspw. auf Leiterplatten, Keramiksubstraten, Transistorsockeln, IC-Gehäusen o.dgl. die Ansprechempfindlichkeit wunschgemäß um größenordungsmäßig eine Dekade zu variieren, den Widerstandswert des die Zündbrücke bildenden SMD-Widerstandes innerhalb von fünf Dekaden wunschgemäß frei wählen zu können, und die Widerstandstoleranz des SMD-Widerstandes < als 1% spezifizieren zu können. In weiterer vorteilhafter Weise ist es möglich, den die Zündbrücke des Detonators bildenden SMD-Widerstand auf Standard-SMD-Bestückungsmaschinen bestücken und mit Standardverfahren der SMD-Technik auf dem Gehäuseboden des Detonators elektrisch leitend fixieren zu können. Diese Fixierung erfolgt zweckmäßigerweise durch Löten, bei dem es sich um ein Reflow-Löten, um ein Vaporphase-Löten o.dgl. handeln kann. Aufgrund dieser an sich bekannten Technologie sind die Herstellungskosten zur Realisierung der Zündbrücke des erfindungsgemäßen Detonators vergleichsweise klein.
- 10
- Detonator
- 12
- Gehäuseboden
- 14
- Kontaktfläche
- 16
- Anschlußpin
- 18
- SMD-Widerstand
- 20
- Zündbrücke
- 22
- Anzündsatz
- 24
- Gehäuse
- 26
- Gehäusehülse
- 28
- Deckelelement
- 30
- Gehäuse-Innenraum
- 32
- Verstärkersatz
Claims (4)
- Detonator mit einem eine Zündbrücke (20) für einen Anzündsatz (22) bildenden elektrischen Widerstand, der an einem Gehäuseboden (12) für ein Detonator-Gehäuse (24) vorgesehen ist,
dadurch gekennzeichnet,
daß der die Zündbrücke (20) bildende elektrische Widerstand von mindestens einem an sich bekannten SMD-Widerstand (18) gebildet ist, der auf dem mit Anschlußkontakten (14) versehenen Gehäuseboden (12) elektrisch leitend fixiert ist. - Detonator nach Anspruch 1,
dadurch gekennzeichnet,
daß der Anzündsatz (22) auf den auf dem Gehäuseboden (12) fixierten mindestens einen SMD-Widerstand (18) gepreßt ist. - Detonator nach Anspruch 2,
dadurch gekennzeichnet,
daß der Anzündsatz (22) mit einem Verstärkersatz (32) kombiniert ist. - Detonator nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß mindestens zwei SMD-Widerstände (18) einseitig zusammengeschaltet sind, wobei der gemeinsame Anschluß (16) und die zu den SMD-Widerständen zugehörigen Einzelanschlüsse (16) mit den entsprechenden Anschlußkontakten (14) des Gehäusebodens (12) kontaktiert sind.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19802432 | 1998-01-23 | ||
| DE19802432A DE19802432A1 (de) | 1998-01-23 | 1998-01-23 | Detonator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0932015A1 true EP0932015A1 (de) | 1999-07-28 |
| EP0932015B1 EP0932015B1 (de) | 2001-08-16 |
Family
ID=7855407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99100536A Expired - Lifetime EP0932015B1 (de) | 1998-01-23 | 1999-01-13 | Detonator |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0932015B1 (de) |
| DE (2) | DE19802432A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004076960A1 (de) * | 2003-02-27 | 2004-09-10 | Dynitec Gmbh | Elektrischer detonator |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004004668A1 (de) * | 2004-01-30 | 2005-08-25 | Dynitec Gmbh | Zünd- und Anzündelemente |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3292537A (en) * | 1965-06-15 | 1966-12-20 | Jr Frank A Goss | Multi-signal explosive detonator |
| US3695178A (en) * | 1970-11-09 | 1972-10-03 | Robert E Betts | Delta squib circuit |
| US3906858A (en) * | 1974-07-30 | 1975-09-23 | Us Eneregy Research And Dev Ad | Miniature igniter |
| DE3537820A1 (de) * | 1985-10-24 | 1987-04-30 | Dynamit Nobel Ag | Elektronischer zuender |
| DE3613134A1 (de) | 1986-04-18 | 1987-10-22 | Diehl Gmbh & Co | Elektrischer brueckenzuender |
| EP0248977A1 (de) | 1986-02-27 | 1987-12-16 | Dynamit Nobel Aktiengesellschaft | Elektrisches Anzündelement und Verfahren zu seiner Herstellung |
| US4729315A (en) * | 1986-12-17 | 1988-03-08 | Quantic Industries, Inc. | Thin film bridge initiator and method therefor |
| US4831933A (en) * | 1988-04-18 | 1989-05-23 | Honeywell Inc. | Integrated silicon bridge detonator |
| DE4236729A1 (de) | 1992-10-30 | 1994-05-05 | Dynamit Nobel Ag | Zünd- bzw. Anzündpille |
| WO1996030714A1 (fr) * | 1995-03-31 | 1996-10-03 | Davey Bickford | Initiateur electropyrotechnique, procede de realisation d'un tel initiateur et systeme de securite pour vehicule |
| US5682008A (en) * | 1994-05-31 | 1997-10-28 | State Of Israel Rafael - Armament Development Authority | Monolithic semiconductor igniter for explosives and pyrotechnic mixtures and a process for manufacturing therefore |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL270122A (de) * | 1961-10-05 | |||
| DE2747163A1 (de) * | 1977-10-20 | 1979-04-26 | Dynamit Nobel Ag | Elektrisches anzuendelement |
| JPH0792358B2 (ja) * | 1987-09-14 | 1995-10-09 | 日本工機株式会社 | 電気式点火装置用点火器 |
-
1998
- 1998-01-23 DE DE19802432A patent/DE19802432A1/de not_active Withdrawn
-
1999
- 1999-01-13 EP EP99100536A patent/EP0932015B1/de not_active Expired - Lifetime
- 1999-01-13 DE DE59900192T patent/DE59900192D1/de not_active Expired - Fee Related
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3292537A (en) * | 1965-06-15 | 1966-12-20 | Jr Frank A Goss | Multi-signal explosive detonator |
| US3695178A (en) * | 1970-11-09 | 1972-10-03 | Robert E Betts | Delta squib circuit |
| US3906858A (en) * | 1974-07-30 | 1975-09-23 | Us Eneregy Research And Dev Ad | Miniature igniter |
| DE3537820A1 (de) * | 1985-10-24 | 1987-04-30 | Dynamit Nobel Ag | Elektronischer zuender |
| EP0248977A1 (de) | 1986-02-27 | 1987-12-16 | Dynamit Nobel Aktiengesellschaft | Elektrisches Anzündelement und Verfahren zu seiner Herstellung |
| DE3613134A1 (de) | 1986-04-18 | 1987-10-22 | Diehl Gmbh & Co | Elektrischer brueckenzuender |
| US4729315A (en) * | 1986-12-17 | 1988-03-08 | Quantic Industries, Inc. | Thin film bridge initiator and method therefor |
| US4831933A (en) * | 1988-04-18 | 1989-05-23 | Honeywell Inc. | Integrated silicon bridge detonator |
| DE4236729A1 (de) | 1992-10-30 | 1994-05-05 | Dynamit Nobel Ag | Zünd- bzw. Anzündpille |
| US5682008A (en) * | 1994-05-31 | 1997-10-28 | State Of Israel Rafael - Armament Development Authority | Monolithic semiconductor igniter for explosives and pyrotechnic mixtures and a process for manufacturing therefore |
| WO1996030714A1 (fr) * | 1995-03-31 | 1996-10-03 | Davey Bickford | Initiateur electropyrotechnique, procede de realisation d'un tel initiateur et systeme de securite pour vehicule |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004076960A1 (de) * | 2003-02-27 | 2004-09-10 | Dynitec Gmbh | Elektrischer detonator |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0932015B1 (de) | 2001-08-16 |
| DE59900192D1 (de) | 2001-09-20 |
| DE19802432A1 (de) | 1999-08-26 |
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