EP0179201A2 - Safety circuit for an electric primer - Google Patents

Safety circuit for an electric primer Download PDF

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Publication number
EP0179201A2
EP0179201A2 EP85108803A EP85108803A EP0179201A2 EP 0179201 A2 EP0179201 A2 EP 0179201A2 EP 85108803 A EP85108803 A EP 85108803A EP 85108803 A EP85108803 A EP 85108803A EP 0179201 A2 EP0179201 A2 EP 0179201A2
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EP
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Prior art keywords
ignition
current
ignition means
triggering
circuit
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Granted
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EP85108803A
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German (de)
French (fr)
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EP0179201B1 (en
EP0179201A3 (en
Inventor
Friedrich Dr. Heinemeyer
Winfried Nass
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Dynamit Nobel AG
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Dynamit Nobel AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/40—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected electrically

Definitions

  • the invention relates to a safety circuit of the type specified in the preamble of claim 1.
  • the invention is therefore based on the object of further increasing the safety of electrical ignition means with downstream detonable charges, such as detonator, transfer charge and actual explosive charge.
  • a safety circuit which is designed in accordance with the characterizing part of claim 1. This advantageously makes it possible to restore handling safety in the case of ignition means of the type mentioned, the intended triggering of which has not been successful due to interruptions in the electrical system, by establishing a defined short-circuit connection in parallel with the ignition means. Such interruptions are critical because they can be unstable so that after their disappearance an unwanted triggering by eg stray currents would be possible. The actual existence of the short final connection can be checked by measuring the ignition circuit.
  • this short-circuit connection e.g. Semiconductor resistors are used, which can be destroyed with a current of corresponding voltage so that a short circuit is formed.
  • the use of sintered tantalum capacitors in which targeted electrical breakdowns always result in a short circuit is particularly advantageous. The energy for generating this short-circuit connection is not so great that the entire component is destroyed.
  • an additional fuse can be arranged according to claim 3 in a supply line, which can be blown by means of a current that is greater than the maximum ignition current for 100% ignition.
  • a current that is greater than the maximum ignition current for 100% ignition.
  • the two aforementioned measures can also be combined with one another in such a way that - seen from the supply side of the ignition energy - the component producing the short-circuit connection is arranged in front of the additional fuse. With this circuit it is then possible to blow the fuse first and then generate a defined short circuit.
  • This fuse element is a short-circuit bridge, which is preferably designed as a wire soldered between the two supply lines, which can be selectively destroyed by means of a current of corresponding size and polarity due to a downstream blocking semiconductor element, preferably a blocking diode, without triggering the ignition means becomes.
  • a wire bridge e.g. a thin conductor track that burns or a low-resistance resistor that is interrupted can also be provided.
  • This short-circuit element represents an additional pre-safety device that is only canceled immediately before the intended triggering by means of a corresponding electrical current. Before this, it is possible to measure the ignition lines separately via this short-circuit element with regard to compliance with the required resistance data. After eliminating this pre-release, the entire ignition circuit can then be measured again in order to determine its perfect condition or a possible interruption or short circuit.
  • the safety circuit according to the invention is preferably integrated directly into the ignition device arrangement, but it can also be arranged close to it.
  • the safety circuit according to the invention is shown in the drawing in an exemplary embodiment and is explained in more detail below with reference to this.
  • the ignition means 1 with a downstream detonation-capable charge, not shown, can be connected via the feed lines 2 and 3 to an electrical power source, not shown.
  • the supply lines are shown interrupted at 2 1 and 3 'to indicate that the safety circuit explained in more detail below can also be arranged at a distance from the ignition means 1.
  • the component 4, preferably a sintered tantalum capacitor, which enables a targeted short circuit is arranged between the two supply lines 2 and 3.
  • the fuse 5 is also arranged, which enables a targeted interruption of the feed line 2 in the event of a short circuit.
  • the short-circuit bridge 7 parallel to the ignition means 1, the short-circuit bridge 7 is provided with a low-resistance fuse 7 ', which is symbolically indicated here.
  • the bridge 7 is preferably a wire bridge soldered directly between the two supply lines 2 and 3. Seen from the supply side of the ignition energy, the blocking diode 8 is finally arranged behind the short-circuit bridge 7 in the feed line 2, which is designed here so that it blocks against a negative current.
  • the resistor 9 can then be provided parallel to the ignition means 1 in order to achieve a current branch.
  • component 10 which can be a resistor or a choke coil, can also be provided in the feed line 2 in a manner known per se.
  • strong interference voltages can occur, for example, when blasting in the vicinity of transformer stations, radar systems, high-voltage lines or areas prone to lightning, where extremely high stray current is safe is required.
  • the short-circuit bridge 7 turns a sensitive ignition device into a highly insensitive one.
  • the functioning of the safety circuit is as follows:
  • the short-circuit bridge 7 is deliberately destroyed by a negative voltage applied to the lead 2, possibly after measuring the ignition lines beforehand, the blocking diode 8 preventing the ignition means 1 from being influenced. After removal of the short-circuit bridge 7, the entire ignition circuit can then optionally be measured. If it should be found that the resistance is infinite or at least significantly too large, a short circuit can be produced in a targeted manner in parallel with the ignition means 1 via the component 4 by means of a current of appropriate size.
  • the supply line 2 can be specifically interrupted by interrupting the fuse 5 by means of a positive voltage applied to the supply line 2, so that the handling safety is again ensured here. Possibly.
  • an additional defined short circuit can also be generated via the component 4 by means of a positive voltage on the feed line 2.
  • the intended triggering of the ignition means 1 with a downstream detonable charge takes place, if no faulty states of the ignition circuit have been determined, by applying a positive voltage of the appropriate size to the lead 2.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Automotive Seat Belt Assembly (AREA)

Abstract

Die Erfindung befaßt sich mit einer Sicherheitsschaltung für ein elektrisches Zündmittel mit nachgeordneter detonationsfähiger Ladung und zwei elektrischen Zuleitungen. Um die Sicherheit eines solchen Zündmittels gegen ungewollte Auslösung noch weiter zu erhöhen, ist vorgesehen, parallel zum Zündmittel zwischen den beiden Zuleitungen ein elektrisches Bauteil, insbesondere einen gesinterten Tantalkondensator, zu schalten, das in seinem Ausgangszustand zumindest im wesentlichen elektrisch nicht leitend ist, jedoch durch einen Strom mit einer Spannung oberhalb der für die Auslösung des Zündmittels vorgesehenen maximalen Zündspannung in einen Endzustand überführbar ist, in dem es einen Kurzschluß parallel zum Zündmittel bildet. Damit kann der Möglichkeit von mehr oder weniger undefinierten Unterbrechungen im elektrischen System des Zündmittels Rechnung getragen werden. Im Hinblick auf eventuelle Kurzschlüsse kann in einer Zuleitung eine Sicherung angeordnet werden, die durch einen Strom mit einer Stromstärke größer als der für die Auslösung des Zündmittels vorgesehenen maximalen Stromstärke zerstörbar ist. Zur Erhöhung der Streustromfestigkeit kann schließlich noch zwischen beiden Zuleitungen eine diese verbindende Kurzschlußbrücke angeordnet sein, die von einem Strom ohne Auslösung des Zündmittels gezielt zerstörbar ist.The invention relates to a safety circuit for an electrical ignition device with a downstream detonatable charge and two electrical leads. In order to further increase the security of such an ignition means against unwanted triggering, provision is made for an electrical component, in particular a sintered tantalum capacitor, to be connected in parallel with the ignition means between the two supply lines, which in its initial state is at least essentially electrically non-conductive, but by a current with a voltage above the maximum ignition voltage provided for triggering the ignition means can be converted into a final state in which it forms a short circuit in parallel with the ignition means. The possibility of more or less undefined interruptions in the electrical system of the ignition means can thus be taken into account. With regard to possible short circuits, a fuse can be arranged in a feed line, which fuse can be destroyed by a current with a current greater than the maximum current provided for triggering the ignition means. To increase the stray current resistance, a short-circuit bridge connecting them can finally be arranged between the two feed lines, which short circuit can be deliberately destroyed by a current without triggering the ignition means.

Description

Die Erfindung befaßt sich mit einer Sicherheitsschaltung der im Oberbegriff des Anspruchs 1 angegebenen Art.The invention relates to a safety circuit of the type specified in the preamble of claim 1.

Elektrische Zündmittel, wie Spalt- oder Brückenzündmittel, sind um so empfindlicher gegenüber unbeabsichtigte Zündungen, z.B. durch Streuströme oder Hochfrequenz-Einstreuungen, desto kleiner der für die Auslösung erforderliche Zündstrom ist. Um diese Zündmittel gegen ungewollte Zündung sicherer zu machen, sind verschiedene Maßnahmen bekannt. So werden z.B. Widerstände oder Kurzschlußsteckverbindungen parallel zu den Zündmitteln angeordnet. Aufgrund der durch den parallel geschalteten Widerstand bedingten Stromverzweigung wird zwar eine Verkleinerung des über das Zündmittel fließenden Stromes und damit wiederum eine gewisse Erhöhung der Sicherheit erreicht, die aber noch immer nicht zufriedenstellt. Kurzschlußsteckverbindungen müssen vor der gewollten Auslösung der Zündmittel von Hand herausgezogen werden, so daß für einen mehr oder weniger langen Zeitraum keine Schutzwirkung besteht.Electrical ignition devices, such as gap or bridge ignition devices, are all the more sensitive to unintended ignitions, e.g. due to stray currents or high-frequency interference, the smaller the ignition current required for tripping. Various measures are known to make these ignition means safer against unwanted ignition. For example, Resistors or short-circuit plug connections arranged parallel to the ignition means. Due to the current branching caused by the parallel connection of the resistor, a reduction in the current flowing through the ignition means and thus in turn a certain increase in safety is achieved, but is still unsatisfactory. Short-circuit plug connections must be pulled out manually before the intended triggering of the ignition means, so that there is no protective effect for a more or less long period.

Diese Möglichkeit einer ungewollten Zündung ist insbesondere dann kritisch, wenn bei Funktionstests des Zündmittels mit nachgeordneter detonationsfähiger Ladung oder auch beim Einsatz solcher Zündmittel in der Praxis unerwartete Störungen auftreten. Bei Funktionstests, die stichprobenartig durchgeführt werden, werden die Zündmittel mit nachgeordneter Ladung extremen Beanspruchungen ausgesetzt, die bis an die Grenze der Belastbarkeit gehen. Dabei handelt es sich insbesondere um Vibrationsbeanspruchungen, Falltests, Temperaturwechselbeanspruchungen und Feuchtigkeitstests. Durch solche extremen Belastungen bei Funktionstests oder auch beim praktischen Einsatz kann es zu Kontaktschwierigkeiten in der mechanischen Anordnung des Zündmittels mit nachgeordneter Ladung kommen.This possibility of an unwanted ignition is particularly critical when unexpected malfunctions occur in practice during functional tests of the ignition device with a downstream detonatable charge or when such ignition devices are used. Function tests, which are carried out on a random basis, expose the ignition devices with a subsequent charge to extreme loads that go to the limit of their resilience. These are in particular vibration stresses, drop tests, temperature change stresses and moisture tests. Such extreme loads during function tests or during practical use can lead to contact difficulties in the mechanical arrangement of the ignition device with a downstream charge.

Der Erfindung liegt daher die Aufgabe zugrunde, die Sicherheit von elektrischen Zündmitteln mit nachgeordneten detonationsfähigen Ladungen, wie Detonator, Übertragungsladung und eigentliche Sprengladung, noch weiter zu erhöhen.The invention is therefore based on the object of further increasing the safety of electrical ignition means with downstream detonable charges, such as detonator, transfer charge and actual explosive charge.

Diese Aufgabe wird erfindungsgemäß durch eine Sicherheitsschaltung gelöst, die entsprechend dem Kennzeichen des Anspruchs 1 ausgebildet ist. Damit ist es in vorteilhafter Weise möglich, bei Zündmitteln der genannten Art, deren gewollte Auslösung aufgrund von Unterbrechungen im elektrischen System nicht gelungen ist, die Handhabungssicherheit wieder herzustellen, indem parallel zum Zündmittel eine definierte Kurzschlußverbindung hergestellt wird. Solche Unterbrechungen sind deshalb kritisch, da sie instabil sein können so nach deren Wiederverschwinden dann eine ungewollte Auslösung durch z.B. Streuströme möglich wäre. Die tatsächliche Existenz der Kurzschlußverbindung kann durch Ausmessen des Zündkreises kontrolliert werden.This object is achieved according to the invention by a safety circuit which is designed in accordance with the characterizing part of claim 1. This advantageously makes it possible to restore handling safety in the case of ignition means of the type mentioned, the intended triggering of which has not been successful due to interruptions in the electrical system, by establishing a defined short-circuit connection in parallel with the ignition means. Such interruptions are critical because they can be unstable so that after their disappearance an unwanted triggering by eg stray currents would be possible. The actual existence of the short final connection can be checked by measuring the ignition circuit.

Für die Erzeugung dieser Kurzschlußverbindung können z.B. Halbleiterwiderstände verwendet werden, die mit einem Strom entsprechender Spannung so zerstört werden können, daß sich ein Kurzschluß bildet. Besonders vorteilhaft ist jedoch gemäß Anspruch 2 die Verwendung von gesinterten Tantalkondensatoren, bei denen gezielte elektrische Durchschläge immer einen Kurzschluß zur Folge haben. Die Energie für die Erzeugung dieser Kurzschlußverbindung ist dabei aber nicht so groß, daß das gesamte Bauteil zerstört wird.For the creation of this short-circuit connection, e.g. Semiconductor resistors are used, which can be destroyed with a current of corresponding voltage so that a short circuit is formed. However, the use of sintered tantalum capacitors in which targeted electrical breakdowns always result in a short circuit is particularly advantageous. The energy for generating this short-circuit connection is not so great that the entire component is destroyed.

Um der Möglichkeit Rechnung zu tragen, daß es durch die vorgenannten Belastungen auch zu instabilen Kurzschlüssen z.B. in der Kontaktierung, in den Zuführungen oder im Zündmittel selbst kommen kann, kann gemäß Anspruch 3 in einer Zuleitung eine zusätzliche Sicherung angeordnet werden, die mittels eines Stromes durchgebrannt werden kann, der größer ist als der maximale Zündstrom für 100 %ige Zündung. Auch hier kann wieder vor der Handhabung des Zündmittels durch Ausmessen des Zündkreises überprüft werden, ob die Sicherung tatsächlich durchgebrannt und damit die Zuleitung unterbrochen worden ist.To take into account the possibility that the aforementioned loads can also lead to unstable short-circuits e.g. can come in the contact, in the feeds or in the ignition means itself, an additional fuse can be arranged according to claim 3 in a supply line, which can be blown by means of a current that is greater than the maximum ignition current for 100% ignition. Here too, before handling the ignition means, it can be checked by measuring the ignition circuit whether the fuse has actually blown and the supply line has been interrupted.

Für besonders hohe Sicherheitsanforderungen können auch beide vorgenannten Maßnahmen in der Weise miteinander kombiniert werden, daß - von der Zuführungsseite der Zündenergie her gesehen - das die Kurzschlußverbindung erzeugende Bauteil vor der zusätzlichen Sicherung angeordnet ist. Mit dieser Schaltung ist es dann möglich, zunächst die Sicherung durchzubrennen und dann einen definierten Kurzschluß zu erzeugen.For particularly high safety requirements, the two aforementioned measures can also be combined with one another in such a way that - seen from the supply side of the ignition energy - the component producing the short-circuit connection is arranged in front of the additional fuse. With this circuit it is then possible to blow the fuse first and then generate a defined short circuit.

Um schließlich noch der Möglichkeit Rechnung zu tragen, daß auch bei ordnungsgemäßen Zustand des Zündkreises eine Auslösung durch Streuströme oder Hochfrequenz-Einstreuungen möglich ist, kann noch gemäß Anspruch 4 ein weiteres Sicherungselement vorgesehen werden. Bei diesem Sicherungselement handelt es sich um eine Kurzschlußbrücke, die vorzugsweise als ein zwischen den beiden Zuleitungen eingelöteter Draht ausgebildet ist, der aufgrund eines nachgeordneten sperrenden Halbleiterelementes, vorzugsweise einer Sperrdiode, mittels eines Stromes entsprechender Größe und Polarität gezielt zerstörbar ist, ohne daß das Zündmittel ausgelöst wird. Anstelle der Drahtbrücke kann aber z.B. auch eine dünne Leiterbahn, die verbrennt,oder ein niederohmiger Widerstand, der unterbrochen wird, vorgesehen werden.Finally, in order to take into account the possibility that triggering by stray currents or high-frequency interference is possible even when the ignition circuit is in proper condition, a further securing element can be provided. This fuse element is a short-circuit bridge, which is preferably designed as a wire soldered between the two supply lines, which can be selectively destroyed by means of a current of corresponding size and polarity due to a downstream blocking semiconductor element, preferably a blocking diode, without triggering the ignition means becomes. Instead of the wire bridge, e.g. a thin conductor track that burns or a low-resistance resistor that is interrupted can also be provided.

Dieses Kurzschlußelement stellt eine zusätzliche Vorentsicherung dar, die erst unmittelbar vor dem gewollten Auslösen mittels eines entsprechenden elektrischen Stromes aufgehoben wird. Zuvor ist es möglich, die Zündleitungen über dieses Kurzschlußelement separat bezüglich der Einhaltung der geforderten Widerstandsdaten auszumessen. Nach Beseitigen dieser Vorentsicherung kann dann der gesamte Zündkreis nochmals ausgemessen werden, um seinen einwandfreien Zustand oder eine evtl. Unterbrechung bzw. einen Kurzschluß feststellen zu können.This short-circuit element represents an additional pre-safety device that is only canceled immediately before the intended triggering by means of a corresponding electrical current. Before this, it is possible to measure the ignition lines separately via this short-circuit element with regard to compliance with the required resistance data. After eliminating this pre-release, the entire ignition circuit can then be measured again in order to determine its perfect condition or a possible interruption or short circuit.

Die erfindungsgemäße Sicherheitsschaltung ist bevorzugt direkt in die Zündmittelanordnung integriert, sie kann aber auch nahe bei ihr angeordnet sein.The safety circuit according to the invention is preferably integrated directly into the ignition device arrangement, but it can also be arranged close to it.

Die erfindungsgemäße Sicherheitsschaltung ist in der Zeichnung in einem Ausführungsbeispiel gezeigt und wird anhand dieses nachstehend noch näher erläutert.The safety circuit according to the invention is shown in the drawing in an exemplary embodiment and is explained in more detail below with reference to this.

Das Zündmittel 1 mit nicht gezeigter nachgeordneter detonationsfähiger Ladung ist über die Zuleitungen 2 und 3 mit einer nicht gezeigten elektrischen Stromquelle verbindbar. Die Zuleitungen sind bei 21 und 3' unterbrochen dargestellt, um anzudeuten, daß die nachstehend näher erläuterte Sicherheitsschaltung auch im Abstand vom Zündmittel 1 angeordnet sein kann. Zwischen den beiden Zuleitungen 2 und 3 ist das einen gezielten Kurzschluß ermöglichende Bauteil 4, vorzugsweise ein gesinterter Tantalkondensator, angeordnet. In der Zuleitung 2 ist weiterhin die Sicherung 5 angeordnet, welche im Kurzschlußfall eine gezielte Unterbrechung der Zuleitung 2 ermöglicht. Parallel zum Zündmittel 1 ist schließlich noch die Kurzschlußbrücke 7 mit einer hier symbolisch angedeuteten niederohmigen Sicherung 7' vorgesehen. Bevorzugt handelt es sich bei der Brücke 7 um eine zwischen den beiden Zuleitungen 2 und 3 direkt eingelötete Drahtbrücke. Von der Zuführungsseite der Zündenergie her gesehen ist hinter der Kurzschlußbrücke 7 in der Zuleitung 2 schließlich noch die Sperrdiode 8 angeordnet, die hier so ausgebildet ist, daß sie gegen einen negativen Strom sperrt.The ignition means 1 with a downstream detonation-capable charge, not shown, can be connected via the feed lines 2 and 3 to an electrical power source, not shown. The supply lines are shown interrupted at 2 1 and 3 'to indicate that the safety circuit explained in more detail below can also be arranged at a distance from the ignition means 1. The component 4, preferably a sintered tantalum capacitor, which enables a targeted short circuit is arranged between the two supply lines 2 and 3. In the feed line 2, the fuse 5 is also arranged, which enables a targeted interruption of the feed line 2 in the event of a short circuit. Finally, parallel to the ignition means 1, the short-circuit bridge 7 is provided with a low-resistance fuse 7 ', which is symbolically indicated here. The bridge 7 is preferably a wire bridge soldered directly between the two supply lines 2 and 3. Seen from the supply side of the ignition energy, the blocking diode 8 is finally arranged behind the short-circuit bridge 7 in the feed line 2, which is designed here so that it blocks against a negative current.

In bekannter Weise kann dann noch parallel zum Zündmittel 1 der Widerstand 9 zwecks Erreichung einer Stromverzweigung vorgesehen sein. Zum weiteren Schutz gegenüber starken Streuströmen oder Hochfrequenz-Einstreuungen kann in an sich bekannter Weise in der Zuleitung 2 auch noch das Bauteil 10 vorgesehen sein, bei dem es sich um einen Widerstand oder eine Drosselspule handeln kann. Solche starken Störspannungen können z.B. bei der Sprengung in der Nähe von Transformatorenstationen, Radaranlagen, Hochspannungsleitungen oder blitzgefährdeten Gebieten auftreten, wo eine extrem hohe Streustromsicherheit gefordert wird. Die Kurzschlußbrücke 7 macht dabei aus einem empfindlichen Zündmittel ein hochunempfindliches.In a known manner, the resistor 9 can then be provided parallel to the ignition means 1 in order to achieve a current branch. For further protection against strong stray currents or high-frequency interference, component 10, which can be a resistor or a choke coil, can also be provided in the feed line 2 in a manner known per se. Such strong interference voltages can occur, for example, when blasting in the vicinity of transformer stations, radar systems, high-voltage lines or areas prone to lightning, where extremely high stray current is safe is required. The short-circuit bridge 7 turns a sensitive ignition device into a highly insensitive one.

Die Funktionsweise der Sicherheitsschaltung ist wie folgt: Durch eine an die Zuleitung 2 angelegte negative Spannung wird, ggf. nach vorherigem Ausmessen der Zündleitungen, die Kurzschlußbrücke 7 gezielt zerstört, wobei die Sperrdiode 8 eine Beeinflussung des Zündmittels 1 verhindert. Nach Beseitigen der Kurzschlußbrücke 7 kann dann ggf. der gesamte Zündkreis ausgemessen werden. Sollte sich hierbei ergeben, daß der Widerstand unendlich oder doch wesentlich zu groß ist, so kann mittels eines Stromes entsprechender Größe über das Bauteil 4 gezielt ein Kurzschluß parallel zum Zündmittel 1 hergestellt werden. Sollte dagegen die Ausmessung des Zündkreises einen Kurzschluß oder einen kurzschlußähnlichen Zustand ergeben haben, so kann durch Unterbrechen der Sicherung 5 mittels einer an die Zuleitung 2 angelegten positiven Spannung die Zuleitung 2 gezielt unterbrochen werden, so daß auch hier wiederum die Handhabungssicherheit gewährleistet ist. Ggf. kann auch zur noch weiter erhöhten Sicherheit mittels einer positiven Spannung an der Zuleitung 2 auch noch über das Bauteil 4 ein zusätzlicher definierter Kurzschluß erzeugt werden.The functioning of the safety circuit is as follows: The short-circuit bridge 7 is deliberately destroyed by a negative voltage applied to the lead 2, possibly after measuring the ignition lines beforehand, the blocking diode 8 preventing the ignition means 1 from being influenced. After removal of the short-circuit bridge 7, the entire ignition circuit can then optionally be measured. If it should be found that the resistance is infinite or at least significantly too large, a short circuit can be produced in a targeted manner in parallel with the ignition means 1 via the component 4 by means of a current of appropriate size. If, on the other hand, the measurement of the ignition circuit has resulted in a short circuit or a condition similar to a short circuit, the supply line 2 can be specifically interrupted by interrupting the fuse 5 by means of a positive voltage applied to the supply line 2, so that the handling safety is again ensured here. Possibly. For further increased safety, an additional defined short circuit can also be generated via the component 4 by means of a positive voltage on the feed line 2.

Die gewollte Auslösung des Zündmittels 1 mit.nachgeordneter detonationsfähiger Ladung erfolgt, wenn keine Fehlzustände des Zündkreises festgestellt wurden, durch Anlegen einer positiven Spannung entsprechender Größe an die Zuleitung 2.The intended triggering of the ignition means 1 with a downstream detonable charge takes place, if no faulty states of the ignition circuit have been determined, by applying a positive voltage of the appropriate size to the lead 2.

Claims (4)

1. Sicherheitsschaltung für ein elektrisches Zündmittel mit nachgeordneter detonationsfähiger Ladung und zwei elektrischen Zuleitungen, dadurch ge- kennzeichnet, daß parallel zum Zündmittel (1) zwischen den beiden Zuleitungen (2, 3) ein elektrisches Bauteil (4) geschaltet ist, das in seinem Ausgangszustand zumindest im wesentlichen elektrisch nicht leitend ist, jedoch durch einen Strom mit einer Spannung oberhalb der für die Auslösung des Zündmittels (1) vorgesehenen maximalen Zündspannung in einen Endzustand überführbar ist, in dem es einen Kurzschluß parallel zum Zündmittel (1) bildet.1. Safety circuit for an electrical ignition device with a downstream detonatable charge and two electrical feed lines, characterized in that an electrical component (4) is connected in parallel to the ignition device (1) between the two feed lines (2, 3), which in its initial state is at least essentially electrically non-conductive, but can be converted into a final state by a current with a voltage above the maximum ignition voltage provided for triggering the ignition means (1), in which it forms a short circuit parallel to the ignition means (1). 2. Sicherheitsschaltung nach Anspruch 1, dadurch gekennzeichnet, daß das Bauteil (4) ein gesinterter Tantalkondensator ist.2. Safety circuit according to claim 1, characterized in that the component (4) is a sintered tantalum capacitor. 3. Sicherheitsschaltung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß in einer Zuleitung (2) eine Sicherung (5) angeordnet ist, die durch einen Strom mit einer Stromstärke größer als der für die Auslösung des Zündmittels (1) vorgesehenen maximalen Stromstärke zerstörbar ist.3. Safety circuit according to claim 1 or 2, characterized in that a fuse (5) is arranged in a feed line (2) which can be destroyed by a current with a current greater than the maximum current provided for triggering the ignition means (1) . 4. Sicherheitsschaltung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß in einer Zuleitung (2) ein den Stromfluß in einer Richtung sperrendes Halbleiterelement (8) und - von der Zuführungsseite der Zündenergie her gesehen - vor dem Halbleiterelement (8) eine beide Zuleitungen (2, 3) verbindende Kurzschlußbrücke (7) angeordnet ist, die von einem Strom, gegenüber dem das Halbleiterelement (8) sperrt, ohne Auslösung des Zündmittels (1) zerstörbar ist.4. Safety circuit according to one of claims 1 to 3, characterized in that in a feed line (2) a current flow in one direction blocking semiconductor element (8) and - seen from the supply side of the ignition energy - in front of the semiconductor element (8) both Short-circuit bridge (7) connecting leads (2, 3) is arranged, which can be destroyed by a current against which the semiconductor element (8) blocks without triggering the ignition means (1).
EP85108803A 1984-08-30 1985-07-13 Safety circuit for an electric primer Expired - Lifetime EP0179201B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843431818 DE3431818A1 (en) 1984-08-30 1984-08-30 SAFETY CIRCUIT FOR AN ELECTRIC FUEL
DE3431818 1984-08-30

Publications (3)

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EP0179201A2 true EP0179201A2 (en) 1986-04-30
EP0179201A3 EP0179201A3 (en) 1990-03-07
EP0179201B1 EP0179201B1 (en) 1992-03-04

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EP85108803A Expired - Lifetime EP0179201B1 (en) 1984-08-30 1985-07-13 Safety circuit for an electric primer

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US (1) US4769734A (en)
EP (1) EP0179201B1 (en)
DE (2) DE3431818A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3637988A1 (en) * 1986-11-07 1988-05-11 Diehl Gmbh & Co IGNITION COMPONENT
CN103411486A (en) * 2013-08-21 2013-11-27 南通迅翔自动化设备有限公司 AC/DC (alternative current/direct current) withstand voltage protective device of digital electronic detonator

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3638084A1 (en) * 1986-11-07 1988-05-19 Diehl Gmbh & Co MULTIPLE CONNECTOR FOR ELECTRICALLY CONTROLLABLE IGNITION AGENTS
US4967665A (en) * 1989-07-24 1990-11-06 The United States Of America As Represented By The Secretary Of The Navy RF and DC desensitized electroexplosive device
DE4225330C1 (en) * 1992-07-31 1993-11-04 Bergwerksverband Gmbh DEVICE FOR THE SEQUENTIAL ENDING OF ELECTRIC LITERS
US5367428A (en) * 1992-12-18 1994-11-22 Raymond Engineering Inc. Integrated safety discharge module
US6199484B1 (en) 1997-01-06 2001-03-13 The Ensign-Bickford Company Voltage-protected semiconductor bridge igniter elements
US5992326A (en) * 1997-01-06 1999-11-30 The Ensign-Bickford Company Voltage-protected semiconductor bridge igniter elements
US6729240B1 (en) * 2002-11-26 2004-05-04 The Boeing Company Ignition isolating interrupt circuit
US7286333B2 (en) * 2004-10-28 2007-10-23 The Boeing Company Switch card apparatus and methods
US7568429B2 (en) * 2005-03-18 2009-08-04 Orica Explosives Technology Pty Ltd Wireless detonator assembly, and methods of blasting
CN101711340B (en) * 2007-03-12 2013-06-12 戴诺·诺贝尔公司 Detonator ignition protection circuit
US20220258103A1 (en) 2013-07-18 2022-08-18 DynaEnergetics Europe GmbH Detonator positioning device
CA2941648C (en) 2014-03-07 2022-08-16 Dynaenergetics Gmbh & Co. Kg Device and method for positioning a detonator within a perforating gun assembly
CN106468761B (en) * 2016-09-22 2019-03-26 中国运载火箭技术研究院 A kind of aircraft priming system short-circuit protection circuit and state switching method
US11307011B2 (en) 2017-02-05 2022-04-19 DynaEnergetics Europe GmbH Electronic initiation simulator
US9915513B1 (en) * 2017-02-05 2018-03-13 Dynaenergetics Gmbh & Co. Kg Electronic ignition circuit and method for use
KR102334153B1 (en) * 2017-07-07 2021-12-02 지멘스 악티엔게젤샤프트 electrical short circuit device
US11408279B2 (en) 2018-08-21 2022-08-09 DynaEnergetics Europe GmbH System and method for navigating a wellbore and determining location in a wellbore
US11661824B2 (en) 2018-05-31 2023-05-30 DynaEnergetics Europe GmbH Autonomous perforating drone
US11808093B2 (en) 2018-07-17 2023-11-07 DynaEnergetics Europe GmbH Oriented perforating system
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3295447A (en) * 1965-04-06 1967-01-03 Atlas Chem Ind Electric match assembly and electric explosion initiators made therewith
DE2259378A1 (en) * 1972-12-05 1974-06-12 Messerschmitt Boelkow Blohm ELECTRIC IGNITER
FR2341836A1 (en) * 1976-02-18 1977-09-16 Gevelot Sa Combined electric and pyrotechnical initiator for explosives - has dielectric plug protecting electrodes against arcing due to static electricity
US4061088A (en) * 1975-11-13 1977-12-06 Toyota Jidosha Kogyo Kabushiki Kaisha Electric detonating fuse assembly
GB2083174A (en) * 1980-07-16 1982-03-17 Nippon Oils & Fats Co Ltd Electric detonator
US4380958A (en) * 1980-12-17 1983-04-26 The United States Of America As Represented By The Secretary Of The Army Electrostatic safe electric match

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3793535A (en) * 1972-12-06 1974-02-19 Gen Electric Circuit for protecting semiconductors against transient voltages
GB1496652A (en) * 1973-09-27 1977-12-30 Edwards Ltd C Fire protection apparatus
US3934175A (en) * 1973-12-03 1976-01-20 General Semiconductor Industries, Inc. Power surge protection system
SU630697A1 (en) * 1977-06-20 1978-10-30 Предприятие П/Я Г-4377 Arrangement for overvoltage protection of electric plant
DE2747163A1 (en) * 1977-10-20 1979-04-26 Dynamit Nobel Ag ELECTRICAL ELEMENT
DE3029491C2 (en) * 1980-08-02 1983-05-11 Diehl GmbH & Co, 8500 Nürnberg Method for continuously feeding a load on a floor
DE3231143C2 (en) * 1982-08-21 1984-08-23 Robert Bosch Gmbh, 7000 Stuttgart Reverse polarity and overvoltage protection circuit for electronic consumers
US4587588A (en) * 1984-03-02 1986-05-06 Perma Power Electronics, Inc. Power line transient surge suppressor
US4563720A (en) * 1984-04-17 1986-01-07 General Semiconductor Industries, Inc. Hybrid AC line transient suppressor
US4584622A (en) * 1984-07-09 1986-04-22 Gte Products Corporation Transient voltage surge suppressor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3295447A (en) * 1965-04-06 1967-01-03 Atlas Chem Ind Electric match assembly and electric explosion initiators made therewith
DE2259378A1 (en) * 1972-12-05 1974-06-12 Messerschmitt Boelkow Blohm ELECTRIC IGNITER
US4061088A (en) * 1975-11-13 1977-12-06 Toyota Jidosha Kogyo Kabushiki Kaisha Electric detonating fuse assembly
FR2341836A1 (en) * 1976-02-18 1977-09-16 Gevelot Sa Combined electric and pyrotechnical initiator for explosives - has dielectric plug protecting electrodes against arcing due to static electricity
GB2083174A (en) * 1980-07-16 1982-03-17 Nippon Oils & Fats Co Ltd Electric detonator
US4380958A (en) * 1980-12-17 1983-04-26 The United States Of America As Represented By The Secretary Of The Army Electrostatic safe electric match

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3637988A1 (en) * 1986-11-07 1988-05-11 Diehl Gmbh & Co IGNITION COMPONENT
CN103411486A (en) * 2013-08-21 2013-11-27 南通迅翔自动化设备有限公司 AC/DC (alternative current/direct current) withstand voltage protective device of digital electronic detonator

Also Published As

Publication number Publication date
EP0179201B1 (en) 1992-03-04
EP0179201A3 (en) 1990-03-07
US4769734A (en) 1988-09-06
DE3585487D1 (en) 1992-04-09
DE3431818A1 (en) 1986-03-13

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