WO2011014892A2 - Circuit de déclenchement de détonateur - Google Patents

Circuit de déclenchement de détonateur Download PDF

Info

Publication number
WO2011014892A2
WO2011014892A2 PCT/ZA2010/000039 ZA2010000039W WO2011014892A2 WO 2011014892 A2 WO2011014892 A2 WO 2011014892A2 ZA 2010000039 W ZA2010000039 W ZA 2010000039W WO 2011014892 A2 WO2011014892 A2 WO 2011014892A2
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
circuit
controller
firing
initiating element
Prior art date
Application number
PCT/ZA2010/000039
Other languages
English (en)
Other versions
WO2011014892A3 (fr
Inventor
Andre Koekemoer
Albertus Abraham Labuschagne
Original Assignee
Detnet South Africa (Pty) Ltd
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 Detnet South Africa (Pty) Ltd filed Critical Detnet South Africa (Pty) Ltd
Publication of WO2011014892A2 publication Critical patent/WO2011014892A2/fr
Publication of WO2011014892A3 publication Critical patent/WO2011014892A3/fr
Priority to ZA2011/02956A priority Critical patent/ZA201102956B/en

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
    • F42D1/042—Logic explosive circuits, e.g. with explosive diodes

Definitions

  • An electronic detonator includes an initiating element which is ignited by the application of a current in excess of a predetermined value. During the test phase steps must be taken to ensure that the current through the initiating element, and the energy which is dissipated by the initiating element, are limited to safe levels, for example by using a resistor, to ensure that ignition of the element does not take place. When the element is to be ignited however the resistor again acts to limit the current and the energy which is available to ignite the element is thus restricted.
  • the igniting of the element can be reliably achieved.
  • the time which elapses between generating a firing signal and the instant at which ignition takes place can vary from element to element. In many applications the variation is of no consequence.
  • a practical difficulty which arises in this respect is that the initiating element is small and has a low thermal mass. Consequently its capacity to generate heat is restricted and an explosive, to which the element is exposed, is ignited after a time interval once the firing signal is generated. The duration of the time interval is however neither predictable nor repeatable due to the aforementioned factors.
  • the invention provides a circuit for firing an initiating element of a detonator, the circuit including an integrated circuit controller which operates at a first voltage, an energy storage device, and a switch, at least under the control of the controller, is operable to allow a test current to pass through the initiating element and, thereafter, is operable to pass a firing current through the initiating element, and wherein the firing current is produced by the energy storage device which is operated at a second voltage which is greater than the first voltage.
  • the circuit preferably includes a voltage reduction circuit which reduces the voltage of an electrical supply to the first voltage.
  • the voltage of the electrical supply may be greater than, or substantially equal to, the second voltage.
  • the switch is responsive to the controller and may be connected in series with the initiating element and a current limiting component e.g. a resistor.
  • the switch may be operable by a signal from the controller which is transferred through a fire interface module which protects, additionally, the controller against an over- voltage at the switch.
  • the voltage reduction circuit may include a voltage clamping circuit and one or more components which limit the voltage applied to the controller.
  • the energy storage device is preferably a capacitor.
  • the circuit includes terminals 12 and 14 for connection, via a detonating harness, to a blasting control unit (not shown) of a blasting system.
  • the control unit can output a relatively low voltage of, say, less than 12 volts and a relatively high voltage of, say, 50 volts on the harness, as may be required.
  • the terminals 12 and 14 extend to an integrated circuit controller 16 which is constructed using conventional techniques. As is known this type of circuit can only function at a low voltage of, say, less than 12 volts. The circuit would be destroyed if a high voltage e.g. of more than 12 volts were to be applied to the circuit.
  • a voltage reduction circuit 18 is interposed between the terminals 12 and 14 on the one hand and the controller 16 on the other hand.
  • the voltage reduction circuit includes series components 20 and 22 respectively, for example resistors, and a voltage clamping circuit 24.
  • the net effect of the voltage reduction circuit is to reduce the voltage across the terminals 12 and 14, typically 50 volts, to a lower voltage (not more than 12 volts, say) which is the operating voltage of the controller.
  • These voltage levels are illustrative only and are non limiting.
  • An electronic switch 30 is connected to an output terminal of the controller 16 through a fire interface module 32.
  • the switch is in series with a current limiting component 34, such as a resistor, and an initiating element 36 of an electronic detonator. Further components of the detonator, which are known in the art, are not shown nor described herein.
  • a storage capacitor 40 is connected in parallel to the series components 30, 34 and 36.
  • a diode 42 is connected in series with the terminal 12 and the capacitor, and an opposing side of the capacitor is connected to the terminal 14.
  • the capacitor 40 is thereby charged to a voltage level (50 volts) which is substantially in excess of the operating voltage (less than 12 volts) of the controller. During this process the controller is protected against damage by the voltage reduction circuit 18.
  • voltage levels are exemplary only and are non-limiting.
  • the initiating element 36 When the initiating element 36 is to be ignited a control signal is applied to the switch 30 through the interface module 32.
  • This module protects the controller 16 from the high voltage which prevails across the terminals 12 and 14, and the parallel module of the capacitor 40 and the series components 30, 34 and 36.
  • the interface circuit could for example be an optical isolator, or it could include voltage limiting and voltage clamping circuits similar to those employed between the controller and the terminals 12 and 14.
  • the controller 16 thus works at a first voltage but the initiating element 36 is ignited by energy released from the capacitor 40 which functions at a second voltage which is meaningfully greater than the first voltage.

Landscapes

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

Abstract

L'invention concerne un circuit de déclenchement d'un élément d'un détonateur, ce circuit comprenant un contrôleur de circuit intégré qui fonctionne à une première tension, un dispositif de stockage d'énergie et un commutateur qui, au moins sous la commande du contrôleur, peut être activé pour permettre à un courant de test de traverser l'élément de déclenchement et qui est ensuite activé pour faire passer un courant de déclenchement dans l'élément correspondant, le courant de déclenchement étant produit par le dispositif de stockage d'énergie qui est activé à une seconde tension supérieure à la première.
PCT/ZA2010/000039 2009-07-30 2010-07-28 Circuit de déclenchement de détonateur WO2011014892A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ZA2011/02956A ZA201102956B (en) 2009-07-30 2011-04-20 Detonator firing circuit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2009/05307 2009-07-30
ZA200905307 2009-07-30

Publications (2)

Publication Number Publication Date
WO2011014892A2 true WO2011014892A2 (fr) 2011-02-03
WO2011014892A3 WO2011014892A3 (fr) 2011-03-31

Family

ID=43430979

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/ZA2010/000039 WO2011014892A2 (fr) 2009-07-30 2010-07-28 Circuit de déclenchement de détonateur
PCT/ZA2010/000038 WO2011014891A2 (fr) 2009-07-30 2010-07-28 Circuit de déclenchement de détonateur

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/ZA2010/000038 WO2011014891A2 (fr) 2009-07-30 2010-07-28 Circuit de déclenchement de détonateur

Country Status (3)

Country Link
AR (2) AR077785A1 (fr)
WO (2) WO2011014892A2 (fr)
ZA (2) ZA201102956B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101931266B1 (ko) * 2018-06-21 2018-12-20 윤순덕 회로 시험기 일체형 발파기
CN114945796A (zh) * 2019-11-21 2022-08-26 狩猎巨人公司 带起爆器检测和起爆器电阻测量的可寻址开关

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3033402B1 (fr) 2015-03-04 2017-04-07 Davey Bickford Systeme de commande d'au moins un detonateur electronique
US10359264B2 (en) 2016-08-11 2019-07-23 Austin Star Detonator Company Electronic detonator, electronic ignition module (EIM) and firing circuit for enhanced blasting safety
CN108709466B (zh) * 2018-05-23 2019-12-10 中国电子科技集团公司第五十四研究所 一种电子雷管信号接收电路

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3842917C1 (en) * 1988-12-21 1989-11-30 Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De Fuze device for detonating a pyrotechnic charge
EP0396465B1 (fr) * 1989-05-02 1994-06-15 Schlumberger Limited Système allumeur pour perforateur à charge creuse
WO1996003614A1 (fr) * 1994-07-28 1996-02-08 Asahi Kasei Kogyo Kabushiki Kaisha Allumeur electronique a retard et detonateur electrique
DE19850868C1 (de) * 1998-11-04 2000-04-20 Siemens Ag Schaltung und Verfahren zum Zünden einer Zündpille
KR100616019B1 (ko) * 2000-03-17 2006-08-25 인싸인-빅포드 에어로스페이스 엔드 디펜스 캄파니 화기 점화 시스템
AR050428A1 (es) * 2004-07-21 2006-10-25 Detnet Internat Ltd Un detonador electronico y metodo para ajustar el voltaje de no-disparo de dicho detonador

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101931266B1 (ko) * 2018-06-21 2018-12-20 윤순덕 회로 시험기 일체형 발파기
CN114945796A (zh) * 2019-11-21 2022-08-26 狩猎巨人公司 带起爆器检测和起爆器电阻测量的可寻址开关

Also Published As

Publication number Publication date
WO2011014891A2 (fr) 2011-02-03
AR077784A1 (es) 2011-09-21
WO2011014891A3 (fr) 2011-03-31
AR077785A1 (es) 2011-09-21
ZA201102955B (en) 2012-06-27
ZA201102956B (en) 2012-06-26
WO2011014892A3 (fr) 2011-03-31

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